/* $OpenBSD: intel_pm.c,v 1.40 2015/12/31 13:01:00 kettenis Exp $ */ /* * Copyright © 2012 Intel Corporation * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS * IN THE SOFTWARE. * * Authors: * Eugeni Dodonov * */ #include "i915_drv.h" #include "intel_drv.h" #include /** * RC6 is a special power stage which allows the GPU to enter an very * low-voltage mode when idle, using down to 0V while at this stage. This * stage is entered automatically when the GPU is idle when RC6 support is * enabled, and as soon as new workload arises GPU wakes up automatically as well. * * There are different RC6 modes available in Intel GPU, which differentiate * among each other with the latency required to enter and leave RC6 and * voltage consumed by the GPU in different states. * * The combination of the following flags define which states GPU is allowed * to enter, while RC6 is the normal RC6 state, RC6p is the deep RC6, and * RC6pp is deepest RC6. Their support by hardware varies according to the * GPU, BIOS, chipset and platform. RC6 is usually the safest one and the one * which brings the most power savings; deeper states save more power, but * require higher latency to switch to and wake up. */ #define INTEL_RC6_ENABLE (1<<0) #define INTEL_RC6p_ENABLE (1<<1) #define INTEL_RC6pp_ENABLE (1<<2) /* FBC, or Frame Buffer Compression, is a technique employed to compress the * framebuffer contents in-memory, aiming at reducing the required bandwidth * during in-memory transfers and, therefore, reduce the power packet. * * The benefits of FBC are mostly visible with solid backgrounds and * variation-less patterns. * * FBC-related functionality can be enabled by the means of the * i915.i915_enable_fbc parameter */ static void i8xx_disable_fbc(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; u32 fbc_ctl; /* Disable compression */ fbc_ctl = I915_READ(FBC_CONTROL); if ((fbc_ctl & FBC_CTL_EN) == 0) return; fbc_ctl &= ~FBC_CTL_EN; I915_WRITE(FBC_CONTROL, fbc_ctl); /* Wait for compressing bit to clear */ if (wait_for((I915_READ(FBC_STATUS) & FBC_STAT_COMPRESSING) == 0, 10)) { DRM_DEBUG_KMS("FBC idle timed out\n"); return; } DRM_DEBUG_KMS("disabled FBC\n"); } static void i8xx_enable_fbc(struct drm_crtc *crtc) { struct drm_device *dev = crtc->dev; struct drm_i915_private *dev_priv = dev->dev_private; struct drm_framebuffer *fb = crtc->fb; struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb); struct drm_i915_gem_object *obj = intel_fb->obj; struct intel_crtc *intel_crtc = to_intel_crtc(crtc); int cfb_pitch; int plane, i; u32 fbc_ctl; cfb_pitch = dev_priv->fbc.size / FBC_LL_SIZE; if (fb->pitches[0] < cfb_pitch) cfb_pitch = fb->pitches[0]; /* FBC_CTL wants 32B or 64B units */ if (IS_GEN2(dev)) cfb_pitch = (cfb_pitch / 32) - 1; else cfb_pitch = (cfb_pitch / 64) - 1; plane = intel_crtc->plane == 0 ? FBC_CTL_PLANEA : FBC_CTL_PLANEB; /* Clear old tags */ for (i = 0; i < (FBC_LL_SIZE / 32) + 1; i++) I915_WRITE(FBC_TAG + (i * 4), 0); if (IS_GEN4(dev)) { u32 fbc_ctl2; /* Set it up... */ fbc_ctl2 = FBC_CTL_FENCE_DBL | FBC_CTL_IDLE_IMM | FBC_CTL_CPU_FENCE; fbc_ctl2 |= plane; I915_WRITE(FBC_CONTROL2, fbc_ctl2); I915_WRITE(FBC_FENCE_OFF, crtc->y); } /* enable it... */ fbc_ctl = I915_READ(FBC_CONTROL); fbc_ctl &= 0x3fff << FBC_CTL_INTERVAL_SHIFT; fbc_ctl |= FBC_CTL_EN | FBC_CTL_PERIODIC; if (IS_I945GM(dev)) fbc_ctl |= FBC_CTL_C3_IDLE; /* 945 needs special SR handling */ fbc_ctl |= (cfb_pitch & 0xff) << FBC_CTL_STRIDE_SHIFT; fbc_ctl |= obj->fence_reg; I915_WRITE(FBC_CONTROL, fbc_ctl); DRM_DEBUG_KMS("enabled FBC, pitch %d, yoff %d, plane %c, ", cfb_pitch, crtc->y, plane_name(intel_crtc->plane)); } static bool i8xx_fbc_enabled(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; return I915_READ(FBC_CONTROL) & FBC_CTL_EN; } static void g4x_enable_fbc(struct drm_crtc *crtc) { struct drm_device *dev = crtc->dev; struct drm_i915_private *dev_priv = dev->dev_private; struct drm_framebuffer *fb = crtc->fb; struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb); struct drm_i915_gem_object *obj = intel_fb->obj; struct intel_crtc *intel_crtc = to_intel_crtc(crtc); int plane = intel_crtc->plane == 0 ? DPFC_CTL_PLANEA : DPFC_CTL_PLANEB; u32 dpfc_ctl; dpfc_ctl = plane | DPFC_SR_EN | DPFC_CTL_LIMIT_1X; dpfc_ctl |= DPFC_CTL_FENCE_EN | obj->fence_reg; I915_WRITE(DPFC_CHICKEN, DPFC_HT_MODIFY); I915_WRITE(DPFC_FENCE_YOFF, crtc->y); /* enable it... */ I915_WRITE(DPFC_CONTROL, I915_READ(DPFC_CONTROL) | DPFC_CTL_EN); DRM_DEBUG_KMS("enabled fbc on plane %c\n", plane_name(intel_crtc->plane)); } static void g4x_disable_fbc(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; u32 dpfc_ctl; /* Disable compression */ dpfc_ctl = I915_READ(DPFC_CONTROL); if (dpfc_ctl & DPFC_CTL_EN) { dpfc_ctl &= ~DPFC_CTL_EN; I915_WRITE(DPFC_CONTROL, dpfc_ctl); DRM_DEBUG_KMS("disabled FBC\n"); } } static bool g4x_fbc_enabled(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; return I915_READ(DPFC_CONTROL) & DPFC_CTL_EN; } static void sandybridge_blit_fbc_update(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; u32 blt_ecoskpd; /* Make sure blitter notifies FBC of writes */ /* Blitter is part of Media powerwell on VLV. No impact of * his param in other platforms for now */ gen6_gt_force_wake_get(dev_priv, FORCEWAKE_MEDIA); blt_ecoskpd = I915_READ(GEN6_BLITTER_ECOSKPD); blt_ecoskpd |= GEN6_BLITTER_FBC_NOTIFY << GEN6_BLITTER_LOCK_SHIFT; I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd); blt_ecoskpd |= GEN6_BLITTER_FBC_NOTIFY; I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd); blt_ecoskpd &= ~(GEN6_BLITTER_FBC_NOTIFY << GEN6_BLITTER_LOCK_SHIFT); I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd); POSTING_READ(GEN6_BLITTER_ECOSKPD); gen6_gt_force_wake_put(dev_priv, FORCEWAKE_MEDIA); } static void ironlake_enable_fbc(struct drm_crtc *crtc) { struct drm_device *dev = crtc->dev; struct drm_i915_private *dev_priv = dev->dev_private; struct drm_framebuffer *fb = crtc->fb; struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb); struct drm_i915_gem_object *obj = intel_fb->obj; struct intel_crtc *intel_crtc = to_intel_crtc(crtc); int plane = intel_crtc->plane == 0 ? DPFC_CTL_PLANEA : DPFC_CTL_PLANEB; u32 dpfc_ctl; dpfc_ctl = I915_READ(ILK_DPFC_CONTROL); dpfc_ctl &= DPFC_RESERVED; dpfc_ctl |= (plane | DPFC_CTL_LIMIT_1X); /* Set persistent mode for front-buffer rendering, ala X. */ dpfc_ctl |= DPFC_CTL_PERSISTENT_MODE; dpfc_ctl |= DPFC_CTL_FENCE_EN; if (IS_GEN5(dev)) dpfc_ctl |= obj->fence_reg; I915_WRITE(ILK_DPFC_CHICKEN, DPFC_HT_MODIFY); I915_WRITE(ILK_DPFC_FENCE_YOFF, crtc->y); I915_WRITE(ILK_FBC_RT_BASE, i915_gem_obj_ggtt_offset(obj) | ILK_FBC_RT_VALID); /* enable it... */ I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN); if (IS_GEN6(dev)) { I915_WRITE(SNB_DPFC_CTL_SA, SNB_CPU_FENCE_ENABLE | obj->fence_reg); I915_WRITE(DPFC_CPU_FENCE_OFFSET, crtc->y); sandybridge_blit_fbc_update(dev); } DRM_DEBUG_KMS("enabled fbc on plane %c\n", plane_name(intel_crtc->plane)); } static void ironlake_disable_fbc(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; u32 dpfc_ctl; /* Disable compression */ dpfc_ctl = I915_READ(ILK_DPFC_CONTROL); if (dpfc_ctl & DPFC_CTL_EN) { dpfc_ctl &= ~DPFC_CTL_EN; I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl); DRM_DEBUG_KMS("disabled FBC\n"); } } static bool ironlake_fbc_enabled(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; return I915_READ(ILK_DPFC_CONTROL) & DPFC_CTL_EN; } static void gen7_enable_fbc(struct drm_crtc *crtc) { struct drm_device *dev = crtc->dev; struct drm_i915_private *dev_priv = dev->dev_private; struct drm_framebuffer *fb = crtc->fb; struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb); struct drm_i915_gem_object *obj = intel_fb->obj; struct intel_crtc *intel_crtc = to_intel_crtc(crtc); I915_WRITE(IVB_FBC_RT_BASE, i915_gem_obj_ggtt_offset(obj)); I915_WRITE(ILK_DPFC_CONTROL, DPFC_CTL_EN | DPFC_CTL_LIMIT_1X | IVB_DPFC_CTL_FENCE_EN | intel_crtc->plane << IVB_DPFC_CTL_PLANE_SHIFT); if (IS_IVYBRIDGE(dev)) { /* WaFbcAsynchFlipDisableFbcQueue:ivb */ I915_WRITE(ILK_DISPLAY_CHICKEN1, ILK_FBCQ_DIS); } else { /* WaFbcAsynchFlipDisableFbcQueue:hsw */ I915_WRITE(HSW_PIPE_SLICE_CHICKEN_1(intel_crtc->pipe), HSW_BYPASS_FBC_QUEUE); } I915_WRITE(SNB_DPFC_CTL_SA, SNB_CPU_FENCE_ENABLE | obj->fence_reg); I915_WRITE(DPFC_CPU_FENCE_OFFSET, crtc->y); sandybridge_blit_fbc_update(dev); DRM_DEBUG_KMS("enabled fbc on plane %c\n", plane_name(intel_crtc->plane)); } bool intel_fbc_enabled(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; if (!dev_priv->display.fbc_enabled) return false; return dev_priv->display.fbc_enabled(dev); } static void intel_fbc_work_fn(struct work_struct *__work) { struct intel_fbc_work *work = container_of(to_delayed_work(__work), struct intel_fbc_work, work); struct drm_device *dev = work->crtc->dev; struct drm_i915_private *dev_priv = dev->dev_private; mutex_lock(&dev->struct_mutex); if (work == dev_priv->fbc.fbc_work) { /* Double check that we haven't switched fb without cancelling * the prior work. */ if (work->crtc->fb == work->fb) { dev_priv->display.enable_fbc(work->crtc); dev_priv->fbc.plane = to_intel_crtc(work->crtc)->plane; dev_priv->fbc.fb_id = work->crtc->fb->base.id; dev_priv->fbc.y = work->crtc->y; } dev_priv->fbc.fbc_work = NULL; } mutex_unlock(&dev->struct_mutex); kfree(work); } static void intel_cancel_fbc_work(struct drm_i915_private *dev_priv) { if (dev_priv->fbc.fbc_work == NULL) return; DRM_DEBUG_KMS("cancelling pending FBC enable\n"); /* Synchronisation is provided by struct_mutex and checking of * dev_priv->fbc.fbc_work, so we can perform the cancellation * entirely asynchronously. */ if (cancel_delayed_work(&dev_priv->fbc.fbc_work->work)) /* tasklet was killed before being run, clean up */ kfree(dev_priv->fbc.fbc_work); /* Mark the work as no longer wanted so that if it does * wake-up (because the work was already running and waiting * for our mutex), it will discover that is no longer * necessary to run. */ dev_priv->fbc.fbc_work = NULL; } static void intel_enable_fbc(struct drm_crtc *crtc) { struct intel_fbc_work *work; struct drm_device *dev = crtc->dev; struct drm_i915_private *dev_priv = dev->dev_private; if (!dev_priv->display.enable_fbc) return; intel_cancel_fbc_work(dev_priv); work = kzalloc(sizeof(*work), GFP_KERNEL); if (work == NULL) { DRM_ERROR("Failed to allocate FBC work structure\n"); dev_priv->display.enable_fbc(crtc); return; } work->crtc = crtc; work->fb = crtc->fb; INIT_DELAYED_WORK(&work->work, intel_fbc_work_fn); dev_priv->fbc.fbc_work = work; /* Delay the actual enabling to let pageflipping cease and the * display to settle before starting the compression. Note that * this delay also serves a second purpose: it allows for a * vblank to pass after disabling the FBC before we attempt * to modify the control registers. * * A more complicated solution would involve tracking vblanks * following the termination of the page-flipping sequence * and indeed performing the enable as a co-routine and not * waiting synchronously upon the vblank. * * WaFbcWaitForVBlankBeforeEnable:ilk,snb */ schedule_delayed_work(&work->work, msecs_to_jiffies(50)); } void intel_disable_fbc(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; intel_cancel_fbc_work(dev_priv); if (!dev_priv->display.disable_fbc) return; dev_priv->display.disable_fbc(dev); dev_priv->fbc.plane = -1; } static bool set_no_fbc_reason(struct drm_i915_private *dev_priv, enum no_fbc_reason reason) { if (dev_priv->fbc.no_fbc_reason == reason) return false; dev_priv->fbc.no_fbc_reason = reason; return true; } /** * intel_update_fbc - enable/disable FBC as needed * @dev: the drm_device * * Set up the framebuffer compression hardware at mode set time. We * enable it if possible: * - plane A only (on pre-965) * - no pixel mulitply/line duplication * - no alpha buffer discard * - no dual wide * - framebuffer <= max_hdisplay in width, max_vdisplay in height * * We can't assume that any compression will take place (worst case), * so the compressed buffer has to be the same size as the uncompressed * one. It also must reside (along with the line length buffer) in * stolen memory. * * We need to enable/disable FBC on a global basis. */ void intel_update_fbc(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; struct drm_crtc *crtc = NULL, *tmp_crtc; struct intel_crtc *intel_crtc; struct drm_framebuffer *fb; struct intel_framebuffer *intel_fb; struct drm_i915_gem_object *obj; const struct drm_display_mode *adjusted_mode; unsigned int max_width, max_height; if (!HAS_FBC(dev)) { set_no_fbc_reason(dev_priv, FBC_UNSUPPORTED); return; } if (!i915_powersave) { if (set_no_fbc_reason(dev_priv, FBC_MODULE_PARAM)) DRM_DEBUG_KMS("fbc disabled per module param\n"); return; } /* * If FBC is already on, we just have to verify that we can * keep it that way... * Need to disable if: * - more than one pipe is active * - changing FBC params (stride, fence, mode) * - new fb is too large to fit in compressed buffer * - going to an unsupported config (interlace, pixel multiply, etc.) */ list_for_each_entry(tmp_crtc, &dev->mode_config.crtc_list, head) { if (intel_crtc_active(tmp_crtc) && to_intel_crtc(tmp_crtc)->primary_enabled) { if (crtc) { if (set_no_fbc_reason(dev_priv, FBC_MULTIPLE_PIPES)) DRM_DEBUG_KMS("more than one pipe active, disabling compression\n"); goto out_disable; } crtc = tmp_crtc; } } if (!crtc || crtc->fb == NULL) { if (set_no_fbc_reason(dev_priv, FBC_NO_OUTPUT)) DRM_DEBUG_KMS("no output, disabling\n"); goto out_disable; } intel_crtc = to_intel_crtc(crtc); fb = crtc->fb; intel_fb = to_intel_framebuffer(fb); obj = intel_fb->obj; adjusted_mode = &intel_crtc->config.adjusted_mode; if (i915_enable_fbc < 0 && INTEL_INFO(dev)->gen <= 7 && !IS_HASWELL(dev)) { if (set_no_fbc_reason(dev_priv, FBC_CHIP_DEFAULT)) DRM_DEBUG_KMS("disabled per chip default\n"); goto out_disable; } if (!i915_enable_fbc) { if (set_no_fbc_reason(dev_priv, FBC_MODULE_PARAM)) DRM_DEBUG_KMS("fbc disabled per module param\n"); goto out_disable; } if ((adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE) || (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)) { if (set_no_fbc_reason(dev_priv, FBC_UNSUPPORTED_MODE)) DRM_DEBUG_KMS("mode incompatible with compression, " "disabling\n"); goto out_disable; } if (IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5) { max_width = 4096; max_height = 2048; } else { max_width = 2048; max_height = 1536; } if (intel_crtc->config.pipe_src_w > max_width || intel_crtc->config.pipe_src_h > max_height) { if (set_no_fbc_reason(dev_priv, FBC_MODE_TOO_LARGE)) DRM_DEBUG_KMS("mode too large for compression, disabling\n"); goto out_disable; } if ((INTEL_INFO(dev)->gen < 4 || IS_HASWELL(dev)) && intel_crtc->plane != PLANE_A) { if (set_no_fbc_reason(dev_priv, FBC_BAD_PLANE)) DRM_DEBUG_KMS("plane not A, disabling compression\n"); goto out_disable; } /* The use of a CPU fence is mandatory in order to detect writes * by the CPU to the scanout and trigger updates to the FBC. */ if (obj->tiling_mode != I915_TILING_X || obj->fence_reg == I915_FENCE_REG_NONE) { if (set_no_fbc_reason(dev_priv, FBC_NOT_TILED)) DRM_DEBUG_KMS("framebuffer not tiled or fenced, disabling compression\n"); goto out_disable; } /* If the kernel debugger is active, always disable compression */ if (in_dbg_master()) goto out_disable; if (i915_gem_stolen_setup_compression(dev, intel_fb->obj->base.size)) { if (set_no_fbc_reason(dev_priv, FBC_STOLEN_TOO_SMALL)) DRM_DEBUG_KMS("framebuffer too large, disabling compression\n"); goto out_disable; } /* If the scanout has not changed, don't modify the FBC settings. * Note that we make the fundamental assumption that the fb->obj * cannot be unpinned (and have its GTT offset and fence revoked) * without first being decoupled from the scanout and FBC disabled. */ if (dev_priv->fbc.plane == intel_crtc->plane && dev_priv->fbc.fb_id == fb->base.id && dev_priv->fbc.y == crtc->y) return; if (intel_fbc_enabled(dev)) { /* We update FBC along two paths, after changing fb/crtc * configuration (modeswitching) and after page-flipping * finishes. For the latter, we know that not only did * we disable the FBC at the start of the page-flip * sequence, but also more than one vblank has passed. * * For the former case of modeswitching, it is possible * to switch between two FBC valid configurations * instantaneously so we do need to disable the FBC * before we can modify its control registers. We also * have to wait for the next vblank for that to take * effect. However, since we delay enabling FBC we can * assume that a vblank has passed since disabling and * that we can safely alter the registers in the deferred * callback. * * In the scenario that we go from a valid to invalid * and then back to valid FBC configuration we have * no strict enforcement that a vblank occurred since * disabling the FBC. However, along all current pipe * disabling paths we do need to wait for a vblank at * some point. And we wait before enabling FBC anyway. */ DRM_DEBUG_KMS("disabling active FBC for update\n"); intel_disable_fbc(dev); } intel_enable_fbc(crtc); dev_priv->fbc.no_fbc_reason = FBC_OK; return; out_disable: /* Multiple disables should be harmless */ if (intel_fbc_enabled(dev)) { DRM_DEBUG_KMS("unsupported config, disabling FBC\n"); intel_disable_fbc(dev); } i915_gem_stolen_cleanup_compression(dev); } static void i915_pineview_get_mem_freq(struct drm_device *dev) { drm_i915_private_t *dev_priv = dev->dev_private; u32 tmp; tmp = I915_READ(CLKCFG); switch (tmp & CLKCFG_FSB_MASK) { case CLKCFG_FSB_533: dev_priv->fsb_freq = 533; /* 133*4 */ break; case CLKCFG_FSB_800: dev_priv->fsb_freq = 800; /* 200*4 */ break; case CLKCFG_FSB_667: dev_priv->fsb_freq = 667; /* 167*4 */ break; case CLKCFG_FSB_400: dev_priv->fsb_freq = 400; /* 100*4 */ break; } switch (tmp & CLKCFG_MEM_MASK) { case CLKCFG_MEM_533: dev_priv->mem_freq = 533; break; case CLKCFG_MEM_667: dev_priv->mem_freq = 667; break; case CLKCFG_MEM_800: dev_priv->mem_freq = 800; break; } /* detect pineview DDR3 setting */ tmp = I915_READ(CSHRDDR3CTL); dev_priv->is_ddr3 = (tmp & CSHRDDR3CTL_DDR3) ? 1 : 0; } static void i915_ironlake_get_mem_freq(struct drm_device *dev) { drm_i915_private_t *dev_priv = dev->dev_private; u16 ddrpll, csipll; ddrpll = I915_READ16(DDRMPLL1); csipll = I915_READ16(CSIPLL0); switch (ddrpll & 0xff) { case 0xc: dev_priv->mem_freq = 800; break; case 0x10: dev_priv->mem_freq = 1066; break; case 0x14: dev_priv->mem_freq = 1333; break; case 0x18: dev_priv->mem_freq = 1600; break; default: DRM_DEBUG_DRIVER("unknown memory frequency 0x%02x\n", ddrpll & 0xff); dev_priv->mem_freq = 0; break; } dev_priv->ips.r_t = dev_priv->mem_freq; switch (csipll & 0x3ff) { case 0x00c: dev_priv->fsb_freq = 3200; break; case 0x00e: dev_priv->fsb_freq = 3733; break; case 0x010: dev_priv->fsb_freq = 4266; break; case 0x012: dev_priv->fsb_freq = 4800; break; case 0x014: dev_priv->fsb_freq = 5333; break; case 0x016: dev_priv->fsb_freq = 5866; break; case 0x018: dev_priv->fsb_freq = 6400; break; default: DRM_DEBUG_DRIVER("unknown fsb frequency 0x%04x\n", csipll & 0x3ff); dev_priv->fsb_freq = 0; break; } if (dev_priv->fsb_freq == 3200) { dev_priv->ips.c_m = 0; } else if (dev_priv->fsb_freq > 3200 && dev_priv->fsb_freq <= 4800) { dev_priv->ips.c_m = 1; } else { dev_priv->ips.c_m = 2; } } static const struct cxsr_latency cxsr_latency_table[] = { {1, 0, 800, 400, 3382, 33382, 3983, 33983}, /* DDR2-400 SC */ {1, 0, 800, 667, 3354, 33354, 3807, 33807}, /* DDR2-667 SC */ {1, 0, 800, 800, 3347, 33347, 3763, 33763}, /* DDR2-800 SC */ {1, 1, 800, 667, 6420, 36420, 6873, 36873}, /* DDR3-667 SC */ {1, 1, 800, 800, 5902, 35902, 6318, 36318}, /* DDR3-800 SC */ {1, 0, 667, 400, 3400, 33400, 4021, 34021}, /* DDR2-400 SC */ {1, 0, 667, 667, 3372, 33372, 3845, 33845}, /* DDR2-667 SC */ {1, 0, 667, 800, 3386, 33386, 3822, 33822}, /* DDR2-800 SC */ {1, 1, 667, 667, 6438, 36438, 6911, 36911}, /* DDR3-667 SC */ {1, 1, 667, 800, 5941, 35941, 6377, 36377}, /* DDR3-800 SC */ {1, 0, 400, 400, 3472, 33472, 4173, 34173}, /* DDR2-400 SC */ {1, 0, 400, 667, 3443, 33443, 3996, 33996}, /* DDR2-667 SC */ {1, 0, 400, 800, 3430, 33430, 3946, 33946}, /* DDR2-800 SC */ {1, 1, 400, 667, 6509, 36509, 7062, 37062}, /* DDR3-667 SC */ {1, 1, 400, 800, 5985, 35985, 6501, 36501}, /* DDR3-800 SC */ {0, 0, 800, 400, 3438, 33438, 4065, 34065}, /* DDR2-400 SC */ {0, 0, 800, 667, 3410, 33410, 3889, 33889}, /* DDR2-667 SC */ {0, 0, 800, 800, 3403, 33403, 3845, 33845}, /* DDR2-800 SC */ {0, 1, 800, 667, 6476, 36476, 6955, 36955}, /* DDR3-667 SC */ {0, 1, 800, 800, 5958, 35958, 6400, 36400}, /* DDR3-800 SC */ {0, 0, 667, 400, 3456, 33456, 4103, 34106}, /* DDR2-400 SC */ {0, 0, 667, 667, 3428, 33428, 3927, 33927}, /* DDR2-667 SC */ {0, 0, 667, 800, 3443, 33443, 3905, 33905}, /* DDR2-800 SC */ {0, 1, 667, 667, 6494, 36494, 6993, 36993}, /* DDR3-667 SC */ {0, 1, 667, 800, 5998, 35998, 6460, 36460}, /* DDR3-800 SC */ {0, 0, 400, 400, 3528, 33528, 4255, 34255}, /* DDR2-400 SC */ {0, 0, 400, 667, 3500, 33500, 4079, 34079}, /* DDR2-667 SC */ {0, 0, 400, 800, 3487, 33487, 4029, 34029}, /* DDR2-800 SC */ {0, 1, 400, 667, 6566, 36566, 7145, 37145}, /* DDR3-667 SC */ {0, 1, 400, 800, 6042, 36042, 6584, 36584}, /* DDR3-800 SC */ }; static const struct cxsr_latency *intel_get_cxsr_latency(int is_desktop, int is_ddr3, int fsb, int mem) { const struct cxsr_latency *latency; int i; if (fsb == 0 || mem == 0) return NULL; for (i = 0; i < ARRAY_SIZE(cxsr_latency_table); i++) { latency = &cxsr_latency_table[i]; if (is_desktop == latency->is_desktop && is_ddr3 == latency->is_ddr3 && fsb == latency->fsb_freq && mem == latency->mem_freq) return latency; } DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n"); return NULL; } static void pineview_disable_cxsr(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; /* deactivate cxsr */ I915_WRITE(DSPFW3, I915_READ(DSPFW3) & ~PINEVIEW_SELF_REFRESH_EN); } /* * Latency for FIFO fetches is dependent on several factors: * - memory configuration (speed, channels) * - chipset * - current MCH state * It can be fairly high in some situations, so here we assume a fairly * pessimal value. It's a tradeoff between extra memory fetches (if we * set this value too high, the FIFO will fetch frequently to stay full) * and power consumption (set it too low to save power and we might see * FIFO underruns and display "flicker"). * * A value of 5us seems to be a good balance; safe for very low end * platforms but not overly aggressive on lower latency configs. */ static const int latency_ns = 5000; static int i9xx_get_fifo_size(struct drm_device *dev, int plane) { struct drm_i915_private *dev_priv = dev->dev_private; uint32_t dsparb = I915_READ(DSPARB); int size; size = dsparb & 0x7f; if (plane) size = ((dsparb >> DSPARB_CSTART_SHIFT) & 0x7f) - size; DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb, plane ? "B" : "A", size); return size; } static int i830_get_fifo_size(struct drm_device *dev, int plane) { struct drm_i915_private *dev_priv = dev->dev_private; uint32_t dsparb = I915_READ(DSPARB); int size; size = dsparb & 0x1ff; if (plane) size = ((dsparb >> DSPARB_BEND_SHIFT) & 0x1ff) - size; size >>= 1; /* Convert to cachelines */ DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb, plane ? "B" : "A", size); return size; } static int i845_get_fifo_size(struct drm_device *dev, int plane) { struct drm_i915_private *dev_priv = dev->dev_private; uint32_t dsparb = I915_READ(DSPARB); int size; size = dsparb & 0x7f; size >>= 2; /* Convert to cachelines */ DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb, plane ? "B" : "A", size); return size; } /* Pineview has different values for various configs */ static const struct intel_watermark_params pineview_display_wm = { PINEVIEW_DISPLAY_FIFO, PINEVIEW_MAX_WM, PINEVIEW_DFT_WM, PINEVIEW_GUARD_WM, PINEVIEW_FIFO_LINE_SIZE }; static const struct intel_watermark_params pineview_display_hplloff_wm = { PINEVIEW_DISPLAY_FIFO, PINEVIEW_MAX_WM, PINEVIEW_DFT_HPLLOFF_WM, PINEVIEW_GUARD_WM, PINEVIEW_FIFO_LINE_SIZE }; static const struct intel_watermark_params pineview_cursor_wm = { PINEVIEW_CURSOR_FIFO, PINEVIEW_CURSOR_MAX_WM, PINEVIEW_CURSOR_DFT_WM, PINEVIEW_CURSOR_GUARD_WM, PINEVIEW_FIFO_LINE_SIZE, }; static const struct intel_watermark_params pineview_cursor_hplloff_wm = { PINEVIEW_CURSOR_FIFO, PINEVIEW_CURSOR_MAX_WM, PINEVIEW_CURSOR_DFT_WM, PINEVIEW_CURSOR_GUARD_WM, PINEVIEW_FIFO_LINE_SIZE }; static const struct intel_watermark_params g4x_wm_info = { G4X_FIFO_SIZE, G4X_MAX_WM, G4X_MAX_WM, 2, G4X_FIFO_LINE_SIZE, }; static const struct intel_watermark_params g4x_cursor_wm_info = { I965_CURSOR_FIFO, I965_CURSOR_MAX_WM, I965_CURSOR_DFT_WM, 2, G4X_FIFO_LINE_SIZE, }; static const struct intel_watermark_params valleyview_wm_info = { VALLEYVIEW_FIFO_SIZE, VALLEYVIEW_MAX_WM, VALLEYVIEW_MAX_WM, 2, G4X_FIFO_LINE_SIZE, }; static const struct intel_watermark_params valleyview_cursor_wm_info = { I965_CURSOR_FIFO, VALLEYVIEW_CURSOR_MAX_WM, I965_CURSOR_DFT_WM, 2, G4X_FIFO_LINE_SIZE, }; static const struct intel_watermark_params i965_cursor_wm_info = { I965_CURSOR_FIFO, I965_CURSOR_MAX_WM, I965_CURSOR_DFT_WM, 2, I915_FIFO_LINE_SIZE, }; static const struct intel_watermark_params i945_wm_info = { I945_FIFO_SIZE, I915_MAX_WM, 1, 2, I915_FIFO_LINE_SIZE }; static const struct intel_watermark_params i915_wm_info = { I915_FIFO_SIZE, I915_MAX_WM, 1, 2, I915_FIFO_LINE_SIZE }; static const struct intel_watermark_params i830_wm_info = { I855GM_FIFO_SIZE, I915_MAX_WM, 1, 2, I830_FIFO_LINE_SIZE }; static const struct intel_watermark_params i845_wm_info = { I830_FIFO_SIZE, I915_MAX_WM, 1, 2, I830_FIFO_LINE_SIZE }; /** * intel_calculate_wm - calculate watermark level * @clock_in_khz: pixel clock * @wm: chip FIFO params * @pixel_size: display pixel size * @latency_ns: memory latency for the platform * * Calculate the watermark level (the level at which the display plane will * start fetching from memory again). Each chip has a different display * FIFO size and allocation, so the caller needs to figure that out and pass * in the correct intel_watermark_params structure. * * As the pixel clock runs, the FIFO will be drained at a rate that depends * on the pixel size. When it reaches the watermark level, it'll start * fetching FIFO line sized based chunks from memory until the FIFO fills * past the watermark point. If the FIFO drains completely, a FIFO underrun * will occur, and a display engine hang could result. */ static unsigned long intel_calculate_wm(unsigned long clock_in_khz, const struct intel_watermark_params *wm, int fifo_size, int pixel_size, unsigned long latency_ns) { long entries_required, wm_size; /* * Note: we need to make sure we don't overflow for various clock & * latency values. * clocks go from a few thousand to several hundred thousand. * latency is usually a few thousand */ entries_required = ((clock_in_khz / 1000) * pixel_size * latency_ns) / 1000; entries_required = DIV_ROUND_UP(entries_required, wm->cacheline_size); DRM_DEBUG_KMS("FIFO entries required for mode: %ld\n", entries_required); wm_size = fifo_size - (entries_required + wm->guard_size); DRM_DEBUG_KMS("FIFO watermark level: %ld\n", wm_size); /* Don't promote wm_size to unsigned... */ if (wm_size > (long)wm->max_wm) wm_size = wm->max_wm; if (wm_size <= 0) wm_size = wm->default_wm; return wm_size; } static struct drm_crtc *single_enabled_crtc(struct drm_device *dev) { struct drm_crtc *crtc, *enabled = NULL; list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { if (intel_crtc_active(crtc)) { if (enabled) return NULL; enabled = crtc; } } return enabled; } static void pineview_update_wm(struct drm_crtc *unused_crtc) { struct drm_device *dev = unused_crtc->dev; struct drm_i915_private *dev_priv = dev->dev_private; struct drm_crtc *crtc; const struct cxsr_latency *latency; u32 reg; unsigned long wm; latency = intel_get_cxsr_latency(IS_PINEVIEW_G(dev), dev_priv->is_ddr3, dev_priv->fsb_freq, dev_priv->mem_freq); if (!latency) { DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n"); pineview_disable_cxsr(dev); return; } crtc = single_enabled_crtc(dev); if (crtc) { const struct drm_display_mode *adjusted_mode; int pixel_size = crtc->fb->bits_per_pixel / 8; int clock; adjusted_mode = &to_intel_crtc(crtc)->config.adjusted_mode; clock = adjusted_mode->crtc_clock; /* Display SR */ wm = intel_calculate_wm(clock, &pineview_display_wm, pineview_display_wm.fifo_size, pixel_size, latency->display_sr); reg = I915_READ(DSPFW1); reg &= ~DSPFW_SR_MASK; reg |= wm << DSPFW_SR_SHIFT; I915_WRITE(DSPFW1, reg); DRM_DEBUG_KMS("DSPFW1 register is %x\n", reg); /* cursor SR */ wm = intel_calculate_wm(clock, &pineview_cursor_wm, pineview_display_wm.fifo_size, pixel_size, latency->cursor_sr); reg = I915_READ(DSPFW3); reg &= ~DSPFW_CURSOR_SR_MASK; reg |= (wm & 0x3f) << DSPFW_CURSOR_SR_SHIFT; I915_WRITE(DSPFW3, reg); /* Display HPLL off SR */ wm = intel_calculate_wm(clock, &pineview_display_hplloff_wm, pineview_display_hplloff_wm.fifo_size, pixel_size, latency->display_hpll_disable); reg = I915_READ(DSPFW3); reg &= ~DSPFW_HPLL_SR_MASK; reg |= wm & DSPFW_HPLL_SR_MASK; I915_WRITE(DSPFW3, reg); /* cursor HPLL off SR */ wm = intel_calculate_wm(clock, &pineview_cursor_hplloff_wm, pineview_display_hplloff_wm.fifo_size, pixel_size, latency->cursor_hpll_disable); reg = I915_READ(DSPFW3); reg &= ~DSPFW_HPLL_CURSOR_MASK; reg |= (wm & 0x3f) << DSPFW_HPLL_CURSOR_SHIFT; I915_WRITE(DSPFW3, reg); DRM_DEBUG_KMS("DSPFW3 register is %x\n", reg); /* activate cxsr */ I915_WRITE(DSPFW3, I915_READ(DSPFW3) | PINEVIEW_SELF_REFRESH_EN); DRM_DEBUG_KMS("Self-refresh is enabled\n"); } else { pineview_disable_cxsr(dev); DRM_DEBUG_KMS("Self-refresh is disabled\n"); } } static bool g4x_compute_wm0(struct drm_device *dev, int plane, const struct intel_watermark_params *display, int display_latency_ns, const struct intel_watermark_params *cursor, int cursor_latency_ns, int *plane_wm, int *cursor_wm) { struct drm_crtc *crtc; const struct drm_display_mode *adjusted_mode; int htotal, hdisplay, clock, pixel_size; int line_time_us, line_count; int entries, tlb_miss; crtc = intel_get_crtc_for_plane(dev, plane); if (!intel_crtc_active(crtc)) { *cursor_wm = cursor->guard_size; *plane_wm = display->guard_size; return false; } adjusted_mode = &to_intel_crtc(crtc)->config.adjusted_mode; clock = adjusted_mode->crtc_clock; htotal = adjusted_mode->crtc_htotal; hdisplay = to_intel_crtc(crtc)->config.pipe_src_w; pixel_size = crtc->fb->bits_per_pixel / 8; /* Use the small buffer method to calculate plane watermark */ entries = ((clock * pixel_size / 1000) * display_latency_ns) / 1000; tlb_miss = display->fifo_size*display->cacheline_size - hdisplay * 8; if (tlb_miss > 0) entries += tlb_miss; entries = DIV_ROUND_UP(entries, display->cacheline_size); *plane_wm = entries + display->guard_size; if (*plane_wm > (int)display->max_wm) *plane_wm = display->max_wm; /* Use the large buffer method to calculate cursor watermark */ line_time_us = ((htotal * 1000) / clock); line_count = (cursor_latency_ns / line_time_us + 1000) / 1000; entries = line_count * 64 * pixel_size; tlb_miss = cursor->fifo_size*cursor->cacheline_size - hdisplay * 8; if (tlb_miss > 0) entries += tlb_miss; entries = DIV_ROUND_UP(entries, cursor->cacheline_size); *cursor_wm = entries + cursor->guard_size; if (*cursor_wm > (int)cursor->max_wm) *cursor_wm = (int)cursor->max_wm; return true; } /* * Check the wm result. * * If any calculated watermark values is larger than the maximum value that * can be programmed into the associated watermark register, that watermark * must be disabled. */ static bool g4x_check_srwm(struct drm_device *dev, int display_wm, int cursor_wm, const struct intel_watermark_params *display, const struct intel_watermark_params *cursor) { DRM_DEBUG_KMS("SR watermark: display plane %d, cursor %d\n", display_wm, cursor_wm); if (display_wm > display->max_wm) { DRM_DEBUG_KMS("display watermark is too large(%d/%ld), disabling\n", display_wm, display->max_wm); return false; } if (cursor_wm > cursor->max_wm) { DRM_DEBUG_KMS("cursor watermark is too large(%d/%ld), disabling\n", cursor_wm, cursor->max_wm); return false; } if (!(display_wm || cursor_wm)) { DRM_DEBUG_KMS("SR latency is 0, disabling\n"); return false; } return true; } static bool g4x_compute_srwm(struct drm_device *dev, int plane, int latency_ns, const struct intel_watermark_params *display, const struct intel_watermark_params *cursor, int *display_wm, int *cursor_wm) { struct drm_crtc *crtc; const struct drm_display_mode *adjusted_mode; int hdisplay, htotal, pixel_size, clock; unsigned long line_time_us; int line_count, line_size; int small, large; int entries; if (!latency_ns) { *display_wm = *cursor_wm = 0; return false; } crtc = intel_get_crtc_for_plane(dev, plane); adjusted_mode = &to_intel_crtc(crtc)->config.adjusted_mode; clock = adjusted_mode->crtc_clock; htotal = adjusted_mode->crtc_htotal; hdisplay = to_intel_crtc(crtc)->config.pipe_src_w; pixel_size = crtc->fb->bits_per_pixel / 8; line_time_us = (htotal * 1000) / clock; line_count = (latency_ns / line_time_us + 1000) / 1000; line_size = hdisplay * pixel_size; /* Use the minimum of the small and large buffer method for primary */ small = ((clock * pixel_size / 1000) * latency_ns) / 1000; large = line_count * line_size; entries = DIV_ROUND_UP(min(small, large), display->cacheline_size); *display_wm = entries + display->guard_size; /* calculate the self-refresh watermark for display cursor */ entries = line_count * pixel_size * 64; entries = DIV_ROUND_UP(entries, cursor->cacheline_size); *cursor_wm = entries + cursor->guard_size; return g4x_check_srwm(dev, *display_wm, *cursor_wm, display, cursor); } static bool vlv_compute_drain_latency(struct drm_device *dev, int plane, int *plane_prec_mult, int *plane_dl, int *cursor_prec_mult, int *cursor_dl) { struct drm_crtc *crtc; int clock, pixel_size; int entries; crtc = intel_get_crtc_for_plane(dev, plane); if (!intel_crtc_active(crtc)) return false; clock = to_intel_crtc(crtc)->config.adjusted_mode.crtc_clock; pixel_size = crtc->fb->bits_per_pixel / 8; /* BPP */ entries = (clock / 1000) * pixel_size; *plane_prec_mult = (entries > 256) ? DRAIN_LATENCY_PRECISION_32 : DRAIN_LATENCY_PRECISION_16; *plane_dl = (64 * (*plane_prec_mult) * 4) / ((clock / 1000) * pixel_size); entries = (clock / 1000) * 4; /* BPP is always 4 for cursor */ *cursor_prec_mult = (entries > 256) ? DRAIN_LATENCY_PRECISION_32 : DRAIN_LATENCY_PRECISION_16; *cursor_dl = (64 * (*cursor_prec_mult) * 4) / ((clock / 1000) * 4); return true; } /* * Update drain latency registers of memory arbiter * * Valleyview SoC has a new memory arbiter and needs drain latency registers * to be programmed. Each plane has a drain latency multiplier and a drain * latency value. */ static void vlv_update_drain_latency(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; int planea_prec, planea_dl, planeb_prec, planeb_dl; int cursora_prec, cursora_dl, cursorb_prec, cursorb_dl; int plane_prec_mult, cursor_prec_mult; /* Precision multiplier is either 16 or 32 */ /* For plane A, Cursor A */ if (vlv_compute_drain_latency(dev, 0, &plane_prec_mult, &planea_dl, &cursor_prec_mult, &cursora_dl)) { cursora_prec = (cursor_prec_mult == DRAIN_LATENCY_PRECISION_32) ? DDL_CURSORA_PRECISION_32 : DDL_CURSORA_PRECISION_16; planea_prec = (plane_prec_mult == DRAIN_LATENCY_PRECISION_32) ? DDL_PLANEA_PRECISION_32 : DDL_PLANEA_PRECISION_16; I915_WRITE(VLV_DDL1, cursora_prec | (cursora_dl << DDL_CURSORA_SHIFT) | planea_prec | planea_dl); } /* For plane B, Cursor B */ if (vlv_compute_drain_latency(dev, 1, &plane_prec_mult, &planeb_dl, &cursor_prec_mult, &cursorb_dl)) { cursorb_prec = (cursor_prec_mult == DRAIN_LATENCY_PRECISION_32) ? DDL_CURSORB_PRECISION_32 : DDL_CURSORB_PRECISION_16; planeb_prec = (plane_prec_mult == DRAIN_LATENCY_PRECISION_32) ? DDL_PLANEB_PRECISION_32 : DDL_PLANEB_PRECISION_16; I915_WRITE(VLV_DDL2, cursorb_prec | (cursorb_dl << DDL_CURSORB_SHIFT) | planeb_prec | planeb_dl); } } #define single_plane_enabled(mask) is_power_of_2(mask) static void valleyview_update_wm(struct drm_crtc *crtc) { struct drm_device *dev = crtc->dev; static const int sr_latency_ns = 12000; struct drm_i915_private *dev_priv = dev->dev_private; int planea_wm, planeb_wm, cursora_wm, cursorb_wm; int plane_sr, cursor_sr; int ignore_plane_sr, ignore_cursor_sr; unsigned int enabled = 0; vlv_update_drain_latency(dev); if (g4x_compute_wm0(dev, PIPE_A, &valleyview_wm_info, latency_ns, &valleyview_cursor_wm_info, latency_ns, &planea_wm, &cursora_wm)) enabled |= 1 << PIPE_A; if (g4x_compute_wm0(dev, PIPE_B, &valleyview_wm_info, latency_ns, &valleyview_cursor_wm_info, latency_ns, &planeb_wm, &cursorb_wm)) enabled |= 1 << PIPE_B; if (single_plane_enabled(enabled) && g4x_compute_srwm(dev, ffs(enabled) - 1, sr_latency_ns, &valleyview_wm_info, &valleyview_cursor_wm_info, &plane_sr, &ignore_cursor_sr) && g4x_compute_srwm(dev, ffs(enabled) - 1, 2*sr_latency_ns, &valleyview_wm_info, &valleyview_cursor_wm_info, &ignore_plane_sr, &cursor_sr)) { I915_WRITE(FW_BLC_SELF_VLV, FW_CSPWRDWNEN); } else { I915_WRITE(FW_BLC_SELF_VLV, I915_READ(FW_BLC_SELF_VLV) & ~FW_CSPWRDWNEN); plane_sr = cursor_sr = 0; } DRM_DEBUG_KMS("Setting FIFO watermarks - A: plane=%d, cursor=%d, B: plane=%d, cursor=%d, SR: plane=%d, cursor=%d\n", planea_wm, cursora_wm, planeb_wm, cursorb_wm, plane_sr, cursor_sr); I915_WRITE(DSPFW1, (plane_sr << DSPFW_SR_SHIFT) | (cursorb_wm << DSPFW_CURSORB_SHIFT) | (planeb_wm << DSPFW_PLANEB_SHIFT) | planea_wm); I915_WRITE(DSPFW2, (I915_READ(DSPFW2) & ~DSPFW_CURSORA_MASK) | (cursora_wm << DSPFW_CURSORA_SHIFT)); I915_WRITE(DSPFW3, (I915_READ(DSPFW3) & ~DSPFW_CURSOR_SR_MASK) | (cursor_sr << DSPFW_CURSOR_SR_SHIFT)); } static void g4x_update_wm(struct drm_crtc *crtc) { struct drm_device *dev = crtc->dev; static const int sr_latency_ns = 12000; struct drm_i915_private *dev_priv = dev->dev_private; int planea_wm, planeb_wm, cursora_wm, cursorb_wm; int plane_sr, cursor_sr; unsigned int enabled = 0; if (g4x_compute_wm0(dev, PIPE_A, &g4x_wm_info, latency_ns, &g4x_cursor_wm_info, latency_ns, &planea_wm, &cursora_wm)) enabled |= 1 << PIPE_A; if (g4x_compute_wm0(dev, PIPE_B, &g4x_wm_info, latency_ns, &g4x_cursor_wm_info, latency_ns, &planeb_wm, &cursorb_wm)) enabled |= 1 << PIPE_B; if (single_plane_enabled(enabled) && g4x_compute_srwm(dev, ffs(enabled) - 1, sr_latency_ns, &g4x_wm_info, &g4x_cursor_wm_info, &plane_sr, &cursor_sr)) { I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN); } else { I915_WRITE(FW_BLC_SELF, I915_READ(FW_BLC_SELF) & ~FW_BLC_SELF_EN); plane_sr = cursor_sr = 0; } DRM_DEBUG_KMS("Setting FIFO watermarks - A: plane=%d, cursor=%d, B: plane=%d, cursor=%d, SR: plane=%d, cursor=%d\n", planea_wm, cursora_wm, planeb_wm, cursorb_wm, plane_sr, cursor_sr); I915_WRITE(DSPFW1, (plane_sr << DSPFW_SR_SHIFT) | (cursorb_wm << DSPFW_CURSORB_SHIFT) | (planeb_wm << DSPFW_PLANEB_SHIFT) | planea_wm); I915_WRITE(DSPFW2, (I915_READ(DSPFW2) & ~DSPFW_CURSORA_MASK) | (cursora_wm << DSPFW_CURSORA_SHIFT)); /* HPLL off in SR has some issues on G4x... disable it */ I915_WRITE(DSPFW3, (I915_READ(DSPFW3) & ~(DSPFW_HPLL_SR_EN | DSPFW_CURSOR_SR_MASK)) | (cursor_sr << DSPFW_CURSOR_SR_SHIFT)); } static void i965_update_wm(struct drm_crtc *unused_crtc) { struct drm_device *dev = unused_crtc->dev; struct drm_i915_private *dev_priv = dev->dev_private; struct drm_crtc *crtc; int srwm = 1; int cursor_sr = 16; /* Calc sr entries for one plane configs */ crtc = single_enabled_crtc(dev); if (crtc) { /* self-refresh has much higher latency */ static const int sr_latency_ns = 12000; const struct drm_display_mode *adjusted_mode = &to_intel_crtc(crtc)->config.adjusted_mode; int clock = adjusted_mode->crtc_clock; int htotal = adjusted_mode->crtc_htotal; int hdisplay = to_intel_crtc(crtc)->config.pipe_src_w; int pixel_size = crtc->fb->bits_per_pixel / 8; unsigned long line_time_us; int entries; line_time_us = ((htotal * 1000) / clock); /* Use ns/us then divide to preserve precision */ entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) * pixel_size * hdisplay; entries = DIV_ROUND_UP(entries, I915_FIFO_LINE_SIZE); srwm = I965_FIFO_SIZE - entries; if (srwm < 0) srwm = 1; srwm &= 0x1ff; DRM_DEBUG_KMS("self-refresh entries: %d, wm: %d\n", entries, srwm); entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) * pixel_size * 64; entries = DIV_ROUND_UP(entries, i965_cursor_wm_info.cacheline_size); cursor_sr = i965_cursor_wm_info.fifo_size - (entries + i965_cursor_wm_info.guard_size); if (cursor_sr > i965_cursor_wm_info.max_wm) cursor_sr = i965_cursor_wm_info.max_wm; DRM_DEBUG_KMS("self-refresh watermark: display plane %d " "cursor %d\n", srwm, cursor_sr); if (IS_CRESTLINE(dev)) I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN); } else { /* Turn off self refresh if both pipes are enabled */ if (IS_CRESTLINE(dev)) I915_WRITE(FW_BLC_SELF, I915_READ(FW_BLC_SELF) & ~FW_BLC_SELF_EN); } DRM_DEBUG_KMS("Setting FIFO watermarks - A: 8, B: 8, C: 8, SR %d\n", srwm); /* 965 has limitations... */ I915_WRITE(DSPFW1, (srwm << DSPFW_SR_SHIFT) | (8 << 16) | (8 << 8) | (8 << 0)); I915_WRITE(DSPFW2, (8 << 8) | (8 << 0)); /* update cursor SR watermark */ I915_WRITE(DSPFW3, (cursor_sr << DSPFW_CURSOR_SR_SHIFT)); } static void i9xx_update_wm(struct drm_crtc *unused_crtc) { struct drm_device *dev = unused_crtc->dev; struct drm_i915_private *dev_priv = dev->dev_private; const struct intel_watermark_params *wm_info; uint32_t fwater_lo; uint32_t fwater_hi; int cwm, srwm = 1; int fifo_size; int planea_wm, planeb_wm; struct drm_crtc *crtc, *enabled = NULL; if (IS_I945GM(dev)) wm_info = &i945_wm_info; else if (!IS_GEN2(dev)) wm_info = &i915_wm_info; else wm_info = &i830_wm_info; fifo_size = dev_priv->display.get_fifo_size(dev, 0); crtc = intel_get_crtc_for_plane(dev, 0); if (intel_crtc_active(crtc)) { const struct drm_display_mode *adjusted_mode; int cpp = crtc->fb->bits_per_pixel / 8; if (IS_GEN2(dev)) cpp = 4; adjusted_mode = &to_intel_crtc(crtc)->config.adjusted_mode; planea_wm = intel_calculate_wm(adjusted_mode->crtc_clock, wm_info, fifo_size, cpp, latency_ns); enabled = crtc; } else planea_wm = fifo_size - wm_info->guard_size; fifo_size = dev_priv->display.get_fifo_size(dev, 1); crtc = intel_get_crtc_for_plane(dev, 1); if (intel_crtc_active(crtc)) { const struct drm_display_mode *adjusted_mode; int cpp = crtc->fb->bits_per_pixel / 8; if (IS_GEN2(dev)) cpp = 4; adjusted_mode = &to_intel_crtc(crtc)->config.adjusted_mode; planeb_wm = intel_calculate_wm(adjusted_mode->crtc_clock, wm_info, fifo_size, cpp, latency_ns); if (enabled == NULL) enabled = crtc; else enabled = NULL; } else planeb_wm = fifo_size - wm_info->guard_size; DRM_DEBUG_KMS("FIFO watermarks - A: %d, B: %d\n", planea_wm, planeb_wm); if (IS_I915GM(dev) && enabled) { struct intel_framebuffer *fb; fb = to_intel_framebuffer(enabled->fb); /* self-refresh seems busted with untiled */ if (fb->obj->tiling_mode == I915_TILING_NONE) enabled = NULL; } /* * Overlay gets an aggressive default since video jitter is bad. */ cwm = 2; /* Play safe and disable self-refresh before adjusting watermarks. */ if (IS_I945G(dev) || IS_I945GM(dev)) I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN_MASK | 0); else if (IS_I915GM(dev)) I915_WRITE(INSTPM, _MASKED_BIT_DISABLE(INSTPM_SELF_EN)); /* Calc sr entries for one plane configs */ if (HAS_FW_BLC(dev) && enabled) { /* self-refresh has much higher latency */ static const int sr_latency_ns = 6000; const struct drm_display_mode *adjusted_mode = &to_intel_crtc(enabled)->config.adjusted_mode; int clock = adjusted_mode->crtc_clock; int htotal = adjusted_mode->crtc_htotal; int hdisplay = to_intel_crtc(enabled)->config.pipe_src_w; int pixel_size = enabled->fb->bits_per_pixel / 8; unsigned long line_time_us; int entries; line_time_us = (htotal * 1000) / clock; /* Use ns/us then divide to preserve precision */ entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) * pixel_size * hdisplay; entries = DIV_ROUND_UP(entries, wm_info->cacheline_size); DRM_DEBUG_KMS("self-refresh entries: %d\n", entries); srwm = wm_info->fifo_size - entries; if (srwm < 0) srwm = 1; if (IS_I945G(dev) || IS_I945GM(dev)) I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_FIFO_MASK | (srwm & 0xff)); else if (IS_I915GM(dev)) I915_WRITE(FW_BLC_SELF, srwm & 0x3f); } DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d, B: %d, C: %d, SR %d\n", planea_wm, planeb_wm, cwm, srwm); fwater_lo = ((planeb_wm & 0x3f) << 16) | (planea_wm & 0x3f); fwater_hi = (cwm & 0x1f); /* Set request length to 8 cachelines per fetch */ fwater_lo = fwater_lo | (1 << 24) | (1 << 8); fwater_hi = fwater_hi | (1 << 8); I915_WRITE(FW_BLC, fwater_lo); I915_WRITE(FW_BLC2, fwater_hi); if (HAS_FW_BLC(dev)) { if (enabled) { if (IS_I945G(dev) || IS_I945GM(dev)) I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN_MASK | FW_BLC_SELF_EN); else if (IS_I915GM(dev)) I915_WRITE(INSTPM, _MASKED_BIT_ENABLE(INSTPM_SELF_EN)); DRM_DEBUG_KMS("memory self refresh enabled\n"); } else DRM_DEBUG_KMS("memory self refresh disabled\n"); } } static void i845_update_wm(struct drm_crtc *unused_crtc) { struct drm_device *dev = unused_crtc->dev; struct drm_i915_private *dev_priv = dev->dev_private; struct drm_crtc *crtc; const struct drm_display_mode *adjusted_mode; uint32_t fwater_lo; int planea_wm; crtc = single_enabled_crtc(dev); if (crtc == NULL) return; adjusted_mode = &to_intel_crtc(crtc)->config.adjusted_mode; planea_wm = intel_calculate_wm(adjusted_mode->crtc_clock, &i845_wm_info, dev_priv->display.get_fifo_size(dev, 0), 4, latency_ns); fwater_lo = I915_READ(FW_BLC) & ~0xfff; fwater_lo |= (3<<8) | planea_wm; DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d\n", planea_wm); I915_WRITE(FW_BLC, fwater_lo); } static uint32_t ilk_pipe_pixel_rate(struct drm_device *dev, struct drm_crtc *crtc) { struct intel_crtc *intel_crtc = to_intel_crtc(crtc); uint32_t pixel_rate; pixel_rate = intel_crtc->config.adjusted_mode.crtc_clock; /* We only use IF-ID interlacing. If we ever use PF-ID we'll need to * adjust the pixel_rate here. */ if (intel_crtc->config.pch_pfit.enabled) { uint64_t pipe_w, pipe_h, pfit_w, pfit_h; uint32_t pfit_size = intel_crtc->config.pch_pfit.size; pipe_w = intel_crtc->config.pipe_src_w; pipe_h = intel_crtc->config.pipe_src_h; pfit_w = (pfit_size >> 16) & 0xFFFF; pfit_h = pfit_size & 0xFFFF; if (pipe_w < pfit_w) pipe_w = pfit_w; if (pipe_h < pfit_h) pipe_h = pfit_h; pixel_rate = div_u64((uint64_t) pixel_rate * pipe_w * pipe_h, pfit_w * pfit_h); } return pixel_rate; } /* latency must be in 0.1us units. */ static uint32_t ilk_wm_method1(uint32_t pixel_rate, uint8_t bytes_per_pixel, uint32_t latency) { uint64_t ret; if (WARN(latency == 0, "Latency value missing\n")) return UINT_MAX; ret = (uint64_t) pixel_rate * bytes_per_pixel * latency; ret = DIV_ROUND_UP_ULL(ret, 64 * 10000) + 2; return ret; } /* latency must be in 0.1us units. */ static uint32_t ilk_wm_method2(uint32_t pixel_rate, uint32_t pipe_htotal, uint32_t horiz_pixels, uint8_t bytes_per_pixel, uint32_t latency) { uint32_t ret; if (WARN(latency == 0, "Latency value missing\n")) return UINT_MAX; ret = (latency * pixel_rate) / (pipe_htotal * 10000); ret = (ret + 1) * horiz_pixels * bytes_per_pixel; ret = DIV_ROUND_UP(ret, 64) + 2; return ret; } static uint32_t ilk_wm_fbc(uint32_t pri_val, uint32_t horiz_pixels, uint8_t bytes_per_pixel) { return DIV_ROUND_UP(pri_val * 64, horiz_pixels * bytes_per_pixel) + 2; } struct ilk_pipe_wm_parameters { bool active; uint32_t pipe_htotal; uint32_t pixel_rate; struct intel_plane_wm_parameters pri; struct intel_plane_wm_parameters spr; struct intel_plane_wm_parameters cur; }; struct ilk_wm_maximums { uint16_t pri; uint16_t spr; uint16_t cur; uint16_t fbc; }; /* used in computing the new watermarks state */ struct intel_wm_config { unsigned int num_pipes_active; bool sprites_enabled; bool sprites_scaled; }; /* * For both WM_PIPE and WM_LP. * mem_value must be in 0.1us units. */ static uint32_t ilk_compute_pri_wm(const struct ilk_pipe_wm_parameters *params, uint32_t mem_value, bool is_lp) { uint32_t method1, method2; if (!params->active || !params->pri.enabled) return 0; method1 = ilk_wm_method1(params->pixel_rate, params->pri.bytes_per_pixel, mem_value); if (!is_lp) return method1; method2 = ilk_wm_method2(params->pixel_rate, params->pipe_htotal, params->pri.horiz_pixels, params->pri.bytes_per_pixel, mem_value); return min(method1, method2); } /* * For both WM_PIPE and WM_LP. * mem_value must be in 0.1us units. */ static uint32_t ilk_compute_spr_wm(const struct ilk_pipe_wm_parameters *params, uint32_t mem_value) { uint32_t method1, method2; if (!params->active || !params->spr.enabled) return 0; method1 = ilk_wm_method1(params->pixel_rate, params->spr.bytes_per_pixel, mem_value); method2 = ilk_wm_method2(params->pixel_rate, params->pipe_htotal, params->spr.horiz_pixels, params->spr.bytes_per_pixel, mem_value); return min(method1, method2); } /* * For both WM_PIPE and WM_LP. * mem_value must be in 0.1us units. */ static uint32_t ilk_compute_cur_wm(const struct ilk_pipe_wm_parameters *params, uint32_t mem_value) { if (!params->active || !params->cur.enabled) return 0; return ilk_wm_method2(params->pixel_rate, params->pipe_htotal, params->cur.horiz_pixels, params->cur.bytes_per_pixel, mem_value); } /* Only for WM_LP. */ static uint32_t ilk_compute_fbc_wm(const struct ilk_pipe_wm_parameters *params, uint32_t pri_val) { if (!params->active || !params->pri.enabled) return 0; return ilk_wm_fbc(pri_val, params->pri.horiz_pixels, params->pri.bytes_per_pixel); } static unsigned int ilk_display_fifo_size(const struct drm_device *dev) { if (INTEL_INFO(dev)->gen >= 8) return 3072; else if (INTEL_INFO(dev)->gen >= 7) return 768; else return 512; } /* Calculate the maximum primary/sprite plane watermark */ static unsigned int ilk_plane_wm_max(const struct drm_device *dev, int level, const struct intel_wm_config *config, enum intel_ddb_partitioning ddb_partitioning, bool is_sprite) { unsigned int fifo_size = ilk_display_fifo_size(dev); unsigned int max; /* if sprites aren't enabled, sprites get nothing */ if (is_sprite && !config->sprites_enabled) return 0; /* HSW allows LP1+ watermarks even with multiple pipes */ if (level == 0 || config->num_pipes_active > 1) { fifo_size /= INTEL_INFO(dev)->num_pipes; /* * For some reason the non self refresh * FIFO size is only half of the self * refresh FIFO size on ILK/SNB. */ if (INTEL_INFO(dev)->gen <= 6) fifo_size /= 2; } if (config->sprites_enabled) { /* level 0 is always calculated with 1:1 split */ if (level > 0 && ddb_partitioning == INTEL_DDB_PART_5_6) { if (is_sprite) fifo_size *= 5; fifo_size /= 6; } else { fifo_size /= 2; } } /* clamp to max that the registers can hold */ if (INTEL_INFO(dev)->gen >= 8) max = level == 0 ? 255 : 2047; else if (INTEL_INFO(dev)->gen >= 7) /* IVB/HSW primary/sprite plane watermarks */ max = level == 0 ? 127 : 1023; else if (!is_sprite) /* ILK/SNB primary plane watermarks */ max = level == 0 ? 127 : 511; else /* ILK/SNB sprite plane watermarks */ max = level == 0 ? 63 : 255; return min(fifo_size, max); } /* Calculate the maximum cursor plane watermark */ static unsigned int ilk_cursor_wm_max(const struct drm_device *dev, int level, const struct intel_wm_config *config) { /* HSW LP1+ watermarks w/ multiple pipes */ if (level > 0 && config->num_pipes_active > 1) return 64; /* otherwise just report max that registers can hold */ if (INTEL_INFO(dev)->gen >= 7) return level == 0 ? 63 : 255; else return level == 0 ? 31 : 63; } /* Calculate the maximum FBC watermark */ static unsigned int ilk_fbc_wm_max(struct drm_device *dev) { /* max that registers can hold */ if (INTEL_INFO(dev)->gen >= 8) return 31; else return 15; } static void ilk_compute_wm_maximums(struct drm_device *dev, int level, const struct intel_wm_config *config, enum intel_ddb_partitioning ddb_partitioning, struct ilk_wm_maximums *max) { max->pri = ilk_plane_wm_max(dev, level, config, ddb_partitioning, false); max->spr = ilk_plane_wm_max(dev, level, config, ddb_partitioning, true); max->cur = ilk_cursor_wm_max(dev, level, config); max->fbc = ilk_fbc_wm_max(dev); } static bool ilk_validate_wm_level(int level, const struct ilk_wm_maximums *max, struct intel_wm_level *result) { bool ret; /* already determined to be invalid? */ if (!result->enable) return false; result->enable = result->pri_val <= max->pri && result->spr_val <= max->spr && result->cur_val <= max->cur; ret = result->enable; /* * HACK until we can pre-compute everything, * and thus fail gracefully if LP0 watermarks * are exceeded... */ if (level == 0 && !result->enable) { if (result->pri_val > max->pri) DRM_DEBUG_KMS("Primary WM%d too large %u (max %u)\n", level, result->pri_val, max->pri); if (result->spr_val > max->spr) DRM_DEBUG_KMS("Sprite WM%d too large %u (max %u)\n", level, result->spr_val, max->spr); if (result->cur_val > max->cur) DRM_DEBUG_KMS("Cursor WM%d too large %u (max %u)\n", level, result->cur_val, max->cur); result->pri_val = min_t(uint32_t, result->pri_val, max->pri); result->spr_val = min_t(uint32_t, result->spr_val, max->spr); result->cur_val = min_t(uint32_t, result->cur_val, max->cur); result->enable = true; } return ret; } static void ilk_compute_wm_level(struct drm_i915_private *dev_priv, int level, const struct ilk_pipe_wm_parameters *p, struct intel_wm_level *result) { uint16_t pri_latency = dev_priv->wm.pri_latency[level]; uint16_t spr_latency = dev_priv->wm.spr_latency[level]; uint16_t cur_latency = dev_priv->wm.cur_latency[level]; /* WM1+ latency values stored in 0.5us units */ if (level > 0) { pri_latency *= 5; spr_latency *= 5; cur_latency *= 5; } result->pri_val = ilk_compute_pri_wm(p, pri_latency, level); result->spr_val = ilk_compute_spr_wm(p, spr_latency); result->cur_val = ilk_compute_cur_wm(p, cur_latency); result->fbc_val = ilk_compute_fbc_wm(p, result->pri_val); result->enable = true; } static uint32_t hsw_compute_linetime_wm(struct drm_device *dev, struct drm_crtc *crtc) { struct drm_i915_private *dev_priv = dev->dev_private; struct intel_crtc *intel_crtc = to_intel_crtc(crtc); struct drm_display_mode *mode = &intel_crtc->config.adjusted_mode; u32 linetime, ips_linetime; if (!intel_crtc_active(crtc)) return 0; /* The WM are computed with base on how long it takes to fill a single * row at the given clock rate, multiplied by 8. * */ linetime = DIV_ROUND_CLOSEST(mode->crtc_htotal * 1000 * 8, mode->crtc_clock); ips_linetime = DIV_ROUND_CLOSEST(mode->crtc_htotal * 1000 * 8, intel_ddi_get_cdclk_freq(dev_priv)); return PIPE_WM_LINETIME_IPS_LINETIME(ips_linetime) | PIPE_WM_LINETIME_TIME(linetime); } static void intel_read_wm_latency(struct drm_device *dev, uint16_t wm[5]) { struct drm_i915_private *dev_priv = dev->dev_private; if (IS_HASWELL(dev) || IS_BROADWELL(dev)) { uint64_t sskpd = I915_READ64(MCH_SSKPD); wm[0] = (sskpd >> 56) & 0xFF; if (wm[0] == 0) wm[0] = sskpd & 0xF; wm[1] = (sskpd >> 4) & 0xFF; wm[2] = (sskpd >> 12) & 0xFF; wm[3] = (sskpd >> 20) & 0x1FF; wm[4] = (sskpd >> 32) & 0x1FF; } else if (INTEL_INFO(dev)->gen >= 6) { uint32_t sskpd = I915_READ(MCH_SSKPD); wm[0] = (sskpd >> SSKPD_WM0_SHIFT) & SSKPD_WM_MASK; wm[1] = (sskpd >> SSKPD_WM1_SHIFT) & SSKPD_WM_MASK; wm[2] = (sskpd >> SSKPD_WM2_SHIFT) & SSKPD_WM_MASK; wm[3] = (sskpd >> SSKPD_WM3_SHIFT) & SSKPD_WM_MASK; } else if (INTEL_INFO(dev)->gen >= 5) { uint32_t mltr = I915_READ(MLTR_ILK); /* ILK primary LP0 latency is 700 ns */ wm[0] = 7; wm[1] = (mltr >> MLTR_WM1_SHIFT) & ILK_SRLT_MASK; wm[2] = (mltr >> MLTR_WM2_SHIFT) & ILK_SRLT_MASK; } } static void intel_fixup_spr_wm_latency(struct drm_device *dev, uint16_t wm[5]) { /* ILK sprite LP0 latency is 1300 ns */ if (INTEL_INFO(dev)->gen == 5) wm[0] = 13; } static void intel_fixup_cur_wm_latency(struct drm_device *dev, uint16_t wm[5]) { /* ILK cursor LP0 latency is 1300 ns */ if (INTEL_INFO(dev)->gen == 5) wm[0] = 13; /* WaDoubleCursorLP3Latency:ivb */ if (IS_IVYBRIDGE(dev)) wm[3] *= 2; } static int ilk_wm_max_level(const struct drm_device *dev) { /* how many WM levels are we expecting */ if (IS_HASWELL(dev) || IS_BROADWELL(dev)) return 4; else if (INTEL_INFO(dev)->gen >= 6) return 3; else return 2; } static void intel_print_wm_latency(struct drm_device *dev, const char *name, const uint16_t wm[5]) { int level, max_level = ilk_wm_max_level(dev); for (level = 0; level <= max_level; level++) { unsigned int latency = wm[level]; if (latency == 0) { DRM_ERROR("%s WM%d latency not provided\n", name, level); continue; } /* WM1+ latency values in 0.5us units */ if (level > 0) latency *= 5; DRM_DEBUG_KMS("%s WM%d latency %u (%u.%u usec)\n", name, level, wm[level], latency / 10, latency % 10); } } static void intel_setup_wm_latency(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; intel_read_wm_latency(dev, dev_priv->wm.pri_latency); memcpy(dev_priv->wm.spr_latency, dev_priv->wm.pri_latency, sizeof(dev_priv->wm.pri_latency)); memcpy(dev_priv->wm.cur_latency, dev_priv->wm.pri_latency, sizeof(dev_priv->wm.pri_latency)); intel_fixup_spr_wm_latency(dev, dev_priv->wm.spr_latency); intel_fixup_cur_wm_latency(dev, dev_priv->wm.cur_latency); intel_print_wm_latency(dev, "Primary", dev_priv->wm.pri_latency); intel_print_wm_latency(dev, "Sprite", dev_priv->wm.spr_latency); intel_print_wm_latency(dev, "Cursor", dev_priv->wm.cur_latency); } static void ilk_compute_wm_parameters(struct drm_crtc *crtc, struct ilk_pipe_wm_parameters *p, struct intel_wm_config *config) { struct drm_device *dev = crtc->dev; struct intel_crtc *intel_crtc = to_intel_crtc(crtc); enum pipe pipe = intel_crtc->pipe; struct drm_plane *plane; p->active = intel_crtc_active(crtc); if (p->active) { p->pipe_htotal = intel_crtc->config.adjusted_mode.crtc_htotal; p->pixel_rate = ilk_pipe_pixel_rate(dev, crtc); p->pri.bytes_per_pixel = crtc->fb->bits_per_pixel / 8; p->cur.bytes_per_pixel = 4; p->pri.horiz_pixels = intel_crtc->config.pipe_src_w; p->cur.horiz_pixels = 64; /* TODO: for now, assume primary and cursor planes are always enabled. */ p->pri.enabled = true; p->cur.enabled = true; } list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) config->num_pipes_active += intel_crtc_active(crtc); list_for_each_entry(plane, &dev->mode_config.plane_list, head) { struct intel_plane *intel_plane = to_intel_plane(plane); if (intel_plane->pipe == pipe) p->spr = intel_plane->wm; config->sprites_enabled |= intel_plane->wm.enabled; config->sprites_scaled |= intel_plane->wm.scaled; } } /* Compute new watermarks for the pipe */ static bool intel_compute_pipe_wm(struct drm_crtc *crtc, const struct ilk_pipe_wm_parameters *params, struct intel_pipe_wm *pipe_wm) { struct drm_device *dev = crtc->dev; struct drm_i915_private *dev_priv = dev->dev_private; int level, max_level = ilk_wm_max_level(dev); /* LP0 watermark maximums depend on this pipe alone */ struct intel_wm_config config = { .num_pipes_active = 1, .sprites_enabled = params->spr.enabled, .sprites_scaled = params->spr.scaled, }; struct ilk_wm_maximums max; /* LP0 watermarks always use 1/2 DDB partitioning */ ilk_compute_wm_maximums(dev, 0, &config, INTEL_DDB_PART_1_2, &max); /* ILK/SNB: LP2+ watermarks only w/o sprites */ if (INTEL_INFO(dev)->gen <= 6 && params->spr.enabled) max_level = 1; /* ILK/SNB/IVB: LP1+ watermarks only w/o scaling */ if (params->spr.scaled) max_level = 0; for (level = 0; level <= max_level; level++) ilk_compute_wm_level(dev_priv, level, params, &pipe_wm->wm[level]); if (IS_HASWELL(dev) || IS_BROADWELL(dev)) pipe_wm->linetime = hsw_compute_linetime_wm(dev, crtc); /* At least LP0 must be valid */ return ilk_validate_wm_level(0, &max, &pipe_wm->wm[0]); } /* * Merge the watermarks from all active pipes for a specific level. */ static void ilk_merge_wm_level(struct drm_device *dev, int level, struct intel_wm_level *ret_wm) { const struct intel_crtc *intel_crtc; list_for_each_entry(intel_crtc, &dev->mode_config.crtc_list, base.head) { const struct intel_wm_level *wm = &intel_crtc->wm.active.wm[level]; if (!wm->enable) return; ret_wm->pri_val = max(ret_wm->pri_val, wm->pri_val); ret_wm->spr_val = max(ret_wm->spr_val, wm->spr_val); ret_wm->cur_val = max(ret_wm->cur_val, wm->cur_val); ret_wm->fbc_val = max(ret_wm->fbc_val, wm->fbc_val); } ret_wm->enable = true; } /* * Merge all low power watermarks for all active pipes. */ static void ilk_wm_merge(struct drm_device *dev, const struct intel_wm_config *config, const struct ilk_wm_maximums *max, struct intel_pipe_wm *merged) { int level, max_level = ilk_wm_max_level(dev); /* ILK/SNB/IVB: LP1+ watermarks only w/ single pipe */ if ((INTEL_INFO(dev)->gen <= 6 || IS_IVYBRIDGE(dev)) && config->num_pipes_active > 1) return; /* ILK: FBC WM must be disabled always */ merged->fbc_wm_enabled = INTEL_INFO(dev)->gen >= 6; /* merge each WM1+ level */ for (level = 1; level <= max_level; level++) { struct intel_wm_level *wm = &merged->wm[level]; ilk_merge_wm_level(dev, level, wm); if (!ilk_validate_wm_level(level, max, wm)) break; /* * The spec says it is preferred to disable * FBC WMs instead of disabling a WM level. */ if (wm->fbc_val > max->fbc) { merged->fbc_wm_enabled = false; wm->fbc_val = 0; } } /* ILK: LP2+ must be disabled when FBC WM is disabled but FBC enabled */ /* * FIXME this is racy. FBC might get enabled later. * What we should check here is whether FBC can be * enabled sometime later. */ if (IS_GEN5(dev) && !merged->fbc_wm_enabled && intel_fbc_enabled(dev)) { for (level = 2; level <= max_level; level++) { struct intel_wm_level *wm = &merged->wm[level]; wm->enable = false; } } } static int ilk_wm_lp_to_level(int wm_lp, const struct intel_pipe_wm *pipe_wm) { /* LP1,LP2,LP3 levels are either 1,2,3 or 1,3,4 */ return wm_lp + (wm_lp >= 2 && pipe_wm->wm[4].enable); } /* The value we need to program into the WM_LPx latency field */ static unsigned int ilk_wm_lp_latency(struct drm_device *dev, int level) { struct drm_i915_private *dev_priv = dev->dev_private; if (IS_HASWELL(dev) || IS_BROADWELL(dev)) return 2 * level; else return dev_priv->wm.pri_latency[level]; } static void ilk_compute_wm_results(struct drm_device *dev, const struct intel_pipe_wm *merged, enum intel_ddb_partitioning partitioning, struct ilk_wm_values *results) { struct intel_crtc *intel_crtc; int level, wm_lp; results->enable_fbc_wm = merged->fbc_wm_enabled; results->partitioning = partitioning; /* LP1+ register values */ for (wm_lp = 1; wm_lp <= 3; wm_lp++) { const struct intel_wm_level *r; level = ilk_wm_lp_to_level(wm_lp, merged); r = &merged->wm[level]; if (!r->enable) break; results->wm_lp[wm_lp - 1] = WM3_LP_EN | (ilk_wm_lp_latency(dev, level) << WM1_LP_LATENCY_SHIFT) | (r->pri_val << WM1_LP_SR_SHIFT) | r->cur_val; if (INTEL_INFO(dev)->gen >= 8) results->wm_lp[wm_lp - 1] |= r->fbc_val << WM1_LP_FBC_SHIFT_BDW; else results->wm_lp[wm_lp - 1] |= r->fbc_val << WM1_LP_FBC_SHIFT; if (INTEL_INFO(dev)->gen <= 6 && r->spr_val) { WARN_ON(wm_lp != 1); results->wm_lp_spr[wm_lp - 1] = WM1S_LP_EN | r->spr_val; } else results->wm_lp_spr[wm_lp - 1] = r->spr_val; } /* LP0 register values */ list_for_each_entry(intel_crtc, &dev->mode_config.crtc_list, base.head) { enum pipe pipe = intel_crtc->pipe; const struct intel_wm_level *r = &intel_crtc->wm.active.wm[0]; if (WARN_ON(!r->enable)) continue; results->wm_linetime[pipe] = intel_crtc->wm.active.linetime; results->wm_pipe[pipe] = (r->pri_val << WM0_PIPE_PLANE_SHIFT) | (r->spr_val << WM0_PIPE_SPRITE_SHIFT) | r->cur_val; } } /* Find the result with the highest level enabled. Check for enable_fbc_wm in * case both are at the same level. Prefer r1 in case they're the same. */ static struct intel_pipe_wm *ilk_find_best_result(struct drm_device *dev, struct intel_pipe_wm *r1, struct intel_pipe_wm *r2) { int level, max_level = ilk_wm_max_level(dev); int level1 = 0, level2 = 0; for (level = 1; level <= max_level; level++) { if (r1->wm[level].enable) level1 = level; if (r2->wm[level].enable) level2 = level; } if (level1 == level2) { if (r2->fbc_wm_enabled && !r1->fbc_wm_enabled) return r2; else return r1; } else if (level1 > level2) { return r1; } else { return r2; } } /* dirty bits used to track which watermarks need changes */ #define WM_DIRTY_PIPE(pipe) (1 << (pipe)) #define WM_DIRTY_LINETIME(pipe) (1 << (8 + (pipe))) #define WM_DIRTY_LP(wm_lp) (1 << (15 + (wm_lp))) #define WM_DIRTY_LP_ALL (WM_DIRTY_LP(1) | WM_DIRTY_LP(2) | WM_DIRTY_LP(3)) #define WM_DIRTY_FBC (1 << 24) #define WM_DIRTY_DDB (1 << 25) static unsigned int ilk_compute_wm_dirty(struct drm_device *dev, const struct ilk_wm_values *old, const struct ilk_wm_values *new) { unsigned int dirty = 0; enum pipe pipe; int wm_lp; for_each_pipe(pipe) { if (old->wm_linetime[pipe] != new->wm_linetime[pipe]) { dirty |= WM_DIRTY_LINETIME(pipe); /* Must disable LP1+ watermarks too */ dirty |= WM_DIRTY_LP_ALL; } if (old->wm_pipe[pipe] != new->wm_pipe[pipe]) { dirty |= WM_DIRTY_PIPE(pipe); /* Must disable LP1+ watermarks too */ dirty |= WM_DIRTY_LP_ALL; } } if (old->enable_fbc_wm != new->enable_fbc_wm) { dirty |= WM_DIRTY_FBC; /* Must disable LP1+ watermarks too */ dirty |= WM_DIRTY_LP_ALL; } if (old->partitioning != new->partitioning) { dirty |= WM_DIRTY_DDB; /* Must disable LP1+ watermarks too */ dirty |= WM_DIRTY_LP_ALL; } /* LP1+ watermarks already deemed dirty, no need to continue */ if (dirty & WM_DIRTY_LP_ALL) return dirty; /* Find the lowest numbered LP1+ watermark in need of an update... */ for (wm_lp = 1; wm_lp <= 3; wm_lp++) { if (old->wm_lp[wm_lp - 1] != new->wm_lp[wm_lp - 1] || old->wm_lp_spr[wm_lp - 1] != new->wm_lp_spr[wm_lp - 1]) break; } /* ...and mark it and all higher numbered LP1+ watermarks as dirty */ for (; wm_lp <= 3; wm_lp++) dirty |= WM_DIRTY_LP(wm_lp); return dirty; } static bool _ilk_disable_lp_wm(struct drm_i915_private *dev_priv, unsigned int dirty) { struct ilk_wm_values *previous = &dev_priv->wm.hw; bool changed = false; if (dirty & WM_DIRTY_LP(3) && previous->wm_lp[2] & WM1_LP_SR_EN) { previous->wm_lp[2] &= ~WM1_LP_SR_EN; I915_WRITE(WM3_LP_ILK, previous->wm_lp[2]); changed = true; } if (dirty & WM_DIRTY_LP(2) && previous->wm_lp[1] & WM1_LP_SR_EN) { previous->wm_lp[1] &= ~WM1_LP_SR_EN; I915_WRITE(WM2_LP_ILK, previous->wm_lp[1]); changed = true; } if (dirty & WM_DIRTY_LP(1) && previous->wm_lp[0] & WM1_LP_SR_EN) { previous->wm_lp[0] &= ~WM1_LP_SR_EN; I915_WRITE(WM1_LP_ILK, previous->wm_lp[0]); changed = true; } /* * Don't touch WM1S_LP_EN here. * Doing so could cause underruns. */ return changed; } /* * The spec says we shouldn't write when we don't need, because every write * causes WMs to be re-evaluated, expending some power. */ static void ilk_write_wm_values(struct drm_i915_private *dev_priv, struct ilk_wm_values *results) { struct drm_device *dev = dev_priv->dev; struct ilk_wm_values *previous = &dev_priv->wm.hw; unsigned int dirty; uint32_t val; dirty = ilk_compute_wm_dirty(dev, previous, results); if (!dirty) return; _ilk_disable_lp_wm(dev_priv, dirty); if (dirty & WM_DIRTY_PIPE(PIPE_A)) I915_WRITE(WM0_PIPEA_ILK, results->wm_pipe[0]); if (dirty & WM_DIRTY_PIPE(PIPE_B)) I915_WRITE(WM0_PIPEB_ILK, results->wm_pipe[1]); if (dirty & WM_DIRTY_PIPE(PIPE_C)) I915_WRITE(WM0_PIPEC_IVB, results->wm_pipe[2]); if (dirty & WM_DIRTY_LINETIME(PIPE_A)) I915_WRITE(PIPE_WM_LINETIME(PIPE_A), results->wm_linetime[0]); if (dirty & WM_DIRTY_LINETIME(PIPE_B)) I915_WRITE(PIPE_WM_LINETIME(PIPE_B), results->wm_linetime[1]); if (dirty & WM_DIRTY_LINETIME(PIPE_C)) I915_WRITE(PIPE_WM_LINETIME(PIPE_C), results->wm_linetime[2]); if (dirty & WM_DIRTY_DDB) { if (IS_HASWELL(dev) || IS_BROADWELL(dev)) { val = I915_READ(WM_MISC); if (results->partitioning == INTEL_DDB_PART_1_2) val &= ~WM_MISC_DATA_PARTITION_5_6; else val |= WM_MISC_DATA_PARTITION_5_6; I915_WRITE(WM_MISC, val); } else { val = I915_READ(DISP_ARB_CTL2); if (results->partitioning == INTEL_DDB_PART_1_2) val &= ~DISP_DATA_PARTITION_5_6; else val |= DISP_DATA_PARTITION_5_6; I915_WRITE(DISP_ARB_CTL2, val); } } if (dirty & WM_DIRTY_FBC) { val = I915_READ(DISP_ARB_CTL); if (results->enable_fbc_wm) val &= ~DISP_FBC_WM_DIS; else val |= DISP_FBC_WM_DIS; I915_WRITE(DISP_ARB_CTL, val); } if (dirty & WM_DIRTY_LP(1) && previous->wm_lp_spr[0] != results->wm_lp_spr[0]) I915_WRITE(WM1S_LP_ILK, results->wm_lp_spr[0]); if (INTEL_INFO(dev)->gen >= 7) { if (dirty & WM_DIRTY_LP(2) && previous->wm_lp_spr[1] != results->wm_lp_spr[1]) I915_WRITE(WM2S_LP_IVB, results->wm_lp_spr[1]); if (dirty & WM_DIRTY_LP(3) && previous->wm_lp_spr[2] != results->wm_lp_spr[2]) I915_WRITE(WM3S_LP_IVB, results->wm_lp_spr[2]); } if (dirty & WM_DIRTY_LP(1) && previous->wm_lp[0] != results->wm_lp[0]) I915_WRITE(WM1_LP_ILK, results->wm_lp[0]); if (dirty & WM_DIRTY_LP(2) && previous->wm_lp[1] != results->wm_lp[1]) I915_WRITE(WM2_LP_ILK, results->wm_lp[1]); if (dirty & WM_DIRTY_LP(3) && previous->wm_lp[2] != results->wm_lp[2]) I915_WRITE(WM3_LP_ILK, results->wm_lp[2]); dev_priv->wm.hw = *results; } static bool ilk_disable_lp_wm(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; return _ilk_disable_lp_wm(dev_priv, WM_DIRTY_LP_ALL); } static void ilk_update_wm(struct drm_crtc *crtc) { struct intel_crtc *intel_crtc = to_intel_crtc(crtc); struct drm_device *dev = crtc->dev; struct drm_i915_private *dev_priv = dev->dev_private; struct ilk_wm_maximums max; struct ilk_pipe_wm_parameters params = {}; struct ilk_wm_values results = {}; enum intel_ddb_partitioning partitioning; struct intel_pipe_wm pipe_wm = {}; struct intel_pipe_wm lp_wm_1_2 = {}, lp_wm_5_6 = {}, *best_lp_wm; struct intel_wm_config config = {}; ilk_compute_wm_parameters(crtc, ¶ms, &config); intel_compute_pipe_wm(crtc, ¶ms, &pipe_wm); if (!memcmp(&intel_crtc->wm.active, &pipe_wm, sizeof(pipe_wm))) return; intel_crtc->wm.active = pipe_wm; ilk_compute_wm_maximums(dev, 1, &config, INTEL_DDB_PART_1_2, &max); ilk_wm_merge(dev, &config, &max, &lp_wm_1_2); /* 5/6 split only in single pipe config on IVB+ */ if (INTEL_INFO(dev)->gen >= 7 && config.num_pipes_active == 1 && config.sprites_enabled) { ilk_compute_wm_maximums(dev, 1, &config, INTEL_DDB_PART_5_6, &max); ilk_wm_merge(dev, &config, &max, &lp_wm_5_6); best_lp_wm = ilk_find_best_result(dev, &lp_wm_1_2, &lp_wm_5_6); } else { best_lp_wm = &lp_wm_1_2; } partitioning = (best_lp_wm == &lp_wm_1_2) ? INTEL_DDB_PART_1_2 : INTEL_DDB_PART_5_6; ilk_compute_wm_results(dev, best_lp_wm, partitioning, &results); ilk_write_wm_values(dev_priv, &results); } static void ilk_update_sprite_wm(struct drm_plane *plane, struct drm_crtc *crtc, uint32_t sprite_width, int pixel_size, bool enabled, bool scaled) { struct drm_device *dev = plane->dev; struct intel_plane *intel_plane = to_intel_plane(plane); intel_plane->wm.enabled = enabled; intel_plane->wm.scaled = scaled; intel_plane->wm.horiz_pixels = sprite_width; intel_plane->wm.bytes_per_pixel = pixel_size; /* * IVB workaround: must disable low power watermarks for at least * one frame before enabling scaling. LP watermarks can be re-enabled * when scaling is disabled. * * WaCxSRDisabledForSpriteScaling:ivb */ if (IS_IVYBRIDGE(dev) && scaled && ilk_disable_lp_wm(dev)) intel_wait_for_vblank(dev, intel_plane->pipe); ilk_update_wm(crtc); } static void ilk_pipe_wm_get_hw_state(struct drm_crtc *crtc) { struct drm_device *dev = crtc->dev; struct drm_i915_private *dev_priv = dev->dev_private; struct ilk_wm_values *hw = &dev_priv->wm.hw; struct intel_crtc *intel_crtc = to_intel_crtc(crtc); struct intel_pipe_wm *active = &intel_crtc->wm.active; enum pipe pipe = intel_crtc->pipe; static const unsigned int wm0_pipe_reg[] = { [PIPE_A] = WM0_PIPEA_ILK, [PIPE_B] = WM0_PIPEB_ILK, [PIPE_C] = WM0_PIPEC_IVB, }; hw->wm_pipe[pipe] = I915_READ(wm0_pipe_reg[pipe]); if (IS_HASWELL(dev) || IS_BROADWELL(dev)) hw->wm_linetime[pipe] = I915_READ(PIPE_WM_LINETIME(pipe)); if (intel_crtc_active(crtc)) { u32 tmp = hw->wm_pipe[pipe]; /* * For active pipes LP0 watermark is marked as * enabled, and LP1+ watermaks as disabled since * we can't really reverse compute them in case * multiple pipes are active. */ active->wm[0].enable = true; active->wm[0].pri_val = (tmp & WM0_PIPE_PLANE_MASK) >> WM0_PIPE_PLANE_SHIFT; active->wm[0].spr_val = (tmp & WM0_PIPE_SPRITE_MASK) >> WM0_PIPE_SPRITE_SHIFT; active->wm[0].cur_val = tmp & WM0_PIPE_CURSOR_MASK; active->linetime = hw->wm_linetime[pipe]; } else { int level, max_level = ilk_wm_max_level(dev); /* * For inactive pipes, all watermark levels * should be marked as enabled but zeroed, * which is what we'd compute them to. */ for (level = 0; level <= max_level; level++) active->wm[level].enable = true; } } void ilk_wm_get_hw_state(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; struct ilk_wm_values *hw = &dev_priv->wm.hw; struct drm_crtc *crtc; list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) ilk_pipe_wm_get_hw_state(crtc); hw->wm_lp[0] = I915_READ(WM1_LP_ILK); hw->wm_lp[1] = I915_READ(WM2_LP_ILK); hw->wm_lp[2] = I915_READ(WM3_LP_ILK); hw->wm_lp_spr[0] = I915_READ(WM1S_LP_ILK); hw->wm_lp_spr[1] = I915_READ(WM2S_LP_IVB); hw->wm_lp_spr[2] = I915_READ(WM3S_LP_IVB); if (IS_HASWELL(dev) || IS_BROADWELL(dev)) hw->partitioning = (I915_READ(WM_MISC) & WM_MISC_DATA_PARTITION_5_6) ? INTEL_DDB_PART_5_6 : INTEL_DDB_PART_1_2; else if (IS_IVYBRIDGE(dev)) hw->partitioning = (I915_READ(DISP_ARB_CTL2) & DISP_DATA_PARTITION_5_6) ? INTEL_DDB_PART_5_6 : INTEL_DDB_PART_1_2; hw->enable_fbc_wm = !(I915_READ(DISP_ARB_CTL) & DISP_FBC_WM_DIS); } /** * intel_update_watermarks - update FIFO watermark values based on current modes * * Calculate watermark values for the various WM regs based on current mode * and plane configuration. * * There are several cases to deal with here: * - normal (i.e. non-self-refresh) * - self-refresh (SR) mode * - lines are large relative to FIFO size (buffer can hold up to 2) * - lines are small relative to FIFO size (buffer can hold more than 2 * lines), so need to account for TLB latency * * The normal calculation is: * watermark = dotclock * bytes per pixel * latency * where latency is platform & configuration dependent (we assume pessimal * values here). * * The SR calculation is: * watermark = (trunc(latency/line time)+1) * surface width * * bytes per pixel * where * line time = htotal / dotclock * surface width = hdisplay for normal plane and 64 for cursor * and latency is assumed to be high, as above. * * The final value programmed to the register should always be rounded up, * and include an extra 2 entries to account for clock crossings. * * We don't use the sprite, so we can ignore that. And on Crestline we have * to set the non-SR watermarks to 8. */ void intel_update_watermarks(struct drm_crtc *crtc) { struct drm_i915_private *dev_priv = crtc->dev->dev_private; if (dev_priv->display.update_wm) dev_priv->display.update_wm(crtc); } void intel_update_sprite_watermarks(struct drm_plane *plane, struct drm_crtc *crtc, uint32_t sprite_width, int pixel_size, bool enabled, bool scaled) { struct drm_i915_private *dev_priv = plane->dev->dev_private; if (dev_priv->display.update_sprite_wm) dev_priv->display.update_sprite_wm(plane, crtc, sprite_width, pixel_size, enabled, scaled); } static struct drm_i915_gem_object * intel_alloc_context_page(struct drm_device *dev) { struct drm_i915_gem_object *ctx; int ret; WARN_ON(!mutex_is_locked(&dev->struct_mutex)); ctx = i915_gem_alloc_object(dev, 4096); if (!ctx) { DRM_DEBUG("failed to alloc power context, RC6 disabled\n"); return NULL; } ret = i915_gem_obj_ggtt_pin(ctx, 4096, true, false); if (ret) { DRM_ERROR("failed to pin power context: %d\n", ret); goto err_unref; } ret = i915_gem_object_set_to_gtt_domain(ctx, 1); if (ret) { DRM_ERROR("failed to set-domain on power context: %d\n", ret); goto err_unpin; } return ctx; err_unpin: i915_gem_object_unpin(ctx); err_unref: drm_gem_object_unreference(&ctx->base); return NULL; } /** * Lock protecting IPS related data structures */ DEFINE_SPINLOCK(mchdev_lock); /* Global for IPS driver to get at the current i915 device. Protected by * mchdev_lock. */ static struct drm_i915_private *i915_mch_dev; bool ironlake_set_drps(struct drm_device *dev, u8 val) { struct drm_i915_private *dev_priv = dev->dev_private; u16 rgvswctl; assert_spin_locked(&mchdev_lock); rgvswctl = I915_READ16(MEMSWCTL); if (rgvswctl & MEMCTL_CMD_STS) { DRM_DEBUG("gpu busy, RCS change rejected\n"); return false; /* still busy with another command */ } rgvswctl = (MEMCTL_CMD_CHFREQ << MEMCTL_CMD_SHIFT) | (val << MEMCTL_FREQ_SHIFT) | MEMCTL_SFCAVM; I915_WRITE16(MEMSWCTL, rgvswctl); POSTING_READ16(MEMSWCTL); rgvswctl |= MEMCTL_CMD_STS; I915_WRITE16(MEMSWCTL, rgvswctl); return true; } static void ironlake_enable_drps(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; u32 rgvmodectl = I915_READ(MEMMODECTL); u8 fmax, fmin, fstart, vstart; spin_lock_irq(&mchdev_lock); /* Enable temp reporting */ I915_WRITE16(PMMISC, I915_READ(PMMISC) | MCPPCE_EN); I915_WRITE16(TSC1, I915_READ(TSC1) | TSE); /* 100ms RC evaluation intervals */ I915_WRITE(RCUPEI, 100000); I915_WRITE(RCDNEI, 100000); /* Set max/min thresholds to 90ms and 80ms respectively */ I915_WRITE(RCBMAXAVG, 90000); I915_WRITE(RCBMINAVG, 80000); I915_WRITE(MEMIHYST, 1); /* Set up min, max, and cur for interrupt handling */ fmax = (rgvmodectl & MEMMODE_FMAX_MASK) >> MEMMODE_FMAX_SHIFT; fmin = (rgvmodectl & MEMMODE_FMIN_MASK); fstart = (rgvmodectl & MEMMODE_FSTART_MASK) >> MEMMODE_FSTART_SHIFT; vstart = (I915_READ(PXVFREQ_BASE + (fstart * 4)) & PXVFREQ_PX_MASK) >> PXVFREQ_PX_SHIFT; dev_priv->ips.fmax = fmax; /* IPS callback will increase this */ dev_priv->ips.fstart = fstart; dev_priv->ips.max_delay = fstart; dev_priv->ips.min_delay = fmin; dev_priv->ips.cur_delay = fstart; DRM_DEBUG_DRIVER("fmax: %d, fmin: %d, fstart: %d\n", fmax, fmin, fstart); I915_WRITE(MEMINTREN, MEMINT_CX_SUPR_EN | MEMINT_EVAL_CHG_EN); /* * Interrupts will be enabled in ironlake_irq_postinstall */ I915_WRITE(VIDSTART, vstart); POSTING_READ(VIDSTART); rgvmodectl |= MEMMODE_SWMODE_EN; I915_WRITE(MEMMODECTL, rgvmodectl); if (wait_for_atomic((I915_READ(MEMSWCTL) & MEMCTL_CMD_STS) == 0, 10)) DRM_ERROR("stuck trying to change perf mode\n"); mdelay(1); ironlake_set_drps(dev, fstart); dev_priv->ips.last_count1 = I915_READ(0x112e4) + I915_READ(0x112e8) + I915_READ(0x112e0); dev_priv->ips.last_time1 = jiffies_to_msecs(jiffies); dev_priv->ips.last_count2 = I915_READ(0x112f4); getrawmonotonic(&dev_priv->ips.last_time2); spin_unlock_irq(&mchdev_lock); } static void ironlake_disable_drps(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; u16 rgvswctl; spin_lock_irq(&mchdev_lock); rgvswctl = I915_READ16(MEMSWCTL); /* Ack interrupts, disable EFC interrupt */ I915_WRITE(MEMINTREN, I915_READ(MEMINTREN) & ~MEMINT_EVAL_CHG_EN); I915_WRITE(MEMINTRSTS, MEMINT_EVAL_CHG); I915_WRITE(DEIER, I915_READ(DEIER) & ~DE_PCU_EVENT); I915_WRITE(DEIIR, DE_PCU_EVENT); I915_WRITE(DEIMR, I915_READ(DEIMR) | DE_PCU_EVENT); /* Go back to the starting frequency */ ironlake_set_drps(dev, dev_priv->ips.fstart); mdelay(1); rgvswctl |= MEMCTL_CMD_STS; I915_WRITE(MEMSWCTL, rgvswctl); mdelay(1); spin_unlock_irq(&mchdev_lock); } /* There's a funny hw issue where the hw returns all 0 when reading from * GEN6_RP_INTERRUPT_LIMITS. Hence we always need to compute the desired value * ourselves, instead of doing a rmw cycle (which might result in us clearing * all limits and the gpu stuck at whatever frequency it is at atm). */ static u32 gen6_rps_limits(struct drm_i915_private *dev_priv, u8 val) { u32 limits; /* Only set the down limit when we've reached the lowest level to avoid * getting more interrupts, otherwise leave this clear. This prevents a * race in the hw when coming out of rc6: There's a tiny window where * the hw runs at the minimal clock before selecting the desired * frequency, if the down threshold expires in that window we will not * receive a down interrupt. */ limits = dev_priv->rps.max_delay << 24; if (val <= dev_priv->rps.min_delay) limits |= dev_priv->rps.min_delay << 16; return limits; } static void gen6_set_rps_thresholds(struct drm_i915_private *dev_priv, u8 val) { int new_power; new_power = dev_priv->rps.power; switch (dev_priv->rps.power) { case LOW_POWER: if (val > dev_priv->rps.rpe_delay + 1 && val > dev_priv->rps.cur_delay) new_power = BETWEEN; break; case BETWEEN: if (val <= dev_priv->rps.rpe_delay && val < dev_priv->rps.cur_delay) new_power = LOW_POWER; else if (val >= dev_priv->rps.rp0_delay && val > dev_priv->rps.cur_delay) new_power = HIGH_POWER; break; case HIGH_POWER: if (val < (dev_priv->rps.rp1_delay + dev_priv->rps.rp0_delay) >> 1 && val < dev_priv->rps.cur_delay) new_power = BETWEEN; break; } /* Max/min bins are special */ if (val == dev_priv->rps.min_delay) new_power = LOW_POWER; if (val == dev_priv->rps.max_delay) new_power = HIGH_POWER; if (new_power == dev_priv->rps.power) return; /* Note the units here are not exactly 1us, but 1280ns. */ switch (new_power) { case LOW_POWER: /* Upclock if more than 95% busy over 16ms */ I915_WRITE(GEN6_RP_UP_EI, 12500); I915_WRITE(GEN6_RP_UP_THRESHOLD, 11800); /* Downclock if less than 85% busy over 32ms */ I915_WRITE(GEN6_RP_DOWN_EI, 25000); I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 21250); I915_WRITE(GEN6_RP_CONTROL, GEN6_RP_MEDIA_TURBO | GEN6_RP_MEDIA_HW_NORMAL_MODE | GEN6_RP_MEDIA_IS_GFX | GEN6_RP_ENABLE | GEN6_RP_UP_BUSY_AVG | GEN6_RP_DOWN_IDLE_AVG); break; case BETWEEN: /* Upclock if more than 90% busy over 13ms */ I915_WRITE(GEN6_RP_UP_EI, 10250); I915_WRITE(GEN6_RP_UP_THRESHOLD, 9225); /* Downclock if less than 75% busy over 32ms */ I915_WRITE(GEN6_RP_DOWN_EI, 25000); I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 18750); I915_WRITE(GEN6_RP_CONTROL, GEN6_RP_MEDIA_TURBO | GEN6_RP_MEDIA_HW_NORMAL_MODE | GEN6_RP_MEDIA_IS_GFX | GEN6_RP_ENABLE | GEN6_RP_UP_BUSY_AVG | GEN6_RP_DOWN_IDLE_AVG); break; case HIGH_POWER: /* Upclock if more than 85% busy over 10ms */ I915_WRITE(GEN6_RP_UP_EI, 8000); I915_WRITE(GEN6_RP_UP_THRESHOLD, 6800); /* Downclock if less than 60% busy over 32ms */ I915_WRITE(GEN6_RP_DOWN_EI, 25000); I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 15000); I915_WRITE(GEN6_RP_CONTROL, GEN6_RP_MEDIA_TURBO | GEN6_RP_MEDIA_HW_NORMAL_MODE | GEN6_RP_MEDIA_IS_GFX | GEN6_RP_ENABLE | GEN6_RP_UP_BUSY_AVG | GEN6_RP_DOWN_IDLE_AVG); break; } dev_priv->rps.power = new_power; dev_priv->rps.last_adj = 0; } void gen6_set_rps(struct drm_device *dev, u8 val) { struct drm_i915_private *dev_priv = dev->dev_private; WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock)); WARN_ON(val > dev_priv->rps.max_delay); WARN_ON(val < dev_priv->rps.min_delay); if (val == dev_priv->rps.cur_delay) return; gen6_set_rps_thresholds(dev_priv, val); if (IS_HASWELL(dev)) I915_WRITE(GEN6_RPNSWREQ, HSW_FREQUENCY(val)); else I915_WRITE(GEN6_RPNSWREQ, GEN6_FREQUENCY(val) | GEN6_OFFSET(0) | GEN6_AGGRESSIVE_TURBO); /* Make sure we continue to get interrupts * until we hit the minimum or maximum frequencies. */ I915_WRITE(GEN6_RP_INTERRUPT_LIMITS, gen6_rps_limits(dev_priv, val)); POSTING_READ(GEN6_RPNSWREQ); dev_priv->rps.cur_delay = val; trace_intel_gpu_freq_change(val * 50); } void gen6_rps_idle(struct drm_i915_private *dev_priv) { struct drm_device *dev = dev_priv->dev; mutex_lock(&dev_priv->rps.hw_lock); if (dev_priv->rps.enabled) { if (IS_VALLEYVIEW(dev)) valleyview_set_rps(dev_priv->dev, dev_priv->rps.min_delay); else gen6_set_rps(dev_priv->dev, dev_priv->rps.min_delay); dev_priv->rps.last_adj = 0; } mutex_unlock(&dev_priv->rps.hw_lock); } void gen6_rps_boost(struct drm_i915_private *dev_priv) { struct drm_device *dev = dev_priv->dev; mutex_lock(&dev_priv->rps.hw_lock); if (dev_priv->rps.enabled) { if (IS_VALLEYVIEW(dev)) valleyview_set_rps(dev_priv->dev, dev_priv->rps.max_delay); else gen6_set_rps(dev_priv->dev, dev_priv->rps.max_delay); dev_priv->rps.last_adj = 0; } mutex_unlock(&dev_priv->rps.hw_lock); } void valleyview_set_rps(struct drm_device *dev, u8 val) { struct drm_i915_private *dev_priv = dev->dev_private; WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock)); WARN_ON(val > dev_priv->rps.max_delay); WARN_ON(val < dev_priv->rps.min_delay); DRM_DEBUG_DRIVER("GPU freq request from %d MHz (%u) to %d MHz (%u)\n", vlv_gpu_freq(dev_priv, dev_priv->rps.cur_delay), dev_priv->rps.cur_delay, vlv_gpu_freq(dev_priv, val), val); if (val == dev_priv->rps.cur_delay) return; vlv_punit_write(dev_priv, PUNIT_REG_GPU_FREQ_REQ, val); dev_priv->rps.cur_delay = val; trace_intel_gpu_freq_change(vlv_gpu_freq(dev_priv, val)); } static void gen6_disable_rps_interrupts(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; I915_WRITE(GEN6_PMINTRMSK, 0xffffffff); I915_WRITE(GEN6_PMIER, I915_READ(GEN6_PMIER) & ~GEN6_PM_RPS_EVENTS); /* Complete PM interrupt masking here doesn't race with the rps work * item again unmasking PM interrupts because that is using a different * register (PMIMR) to mask PM interrupts. The only risk is in leaving * stale bits in PMIIR and PMIMR which gen6_enable_rps will clean up. */ spin_lock_irq(&dev_priv->irq_lock); dev_priv->rps.pm_iir = 0; spin_unlock_irq(&dev_priv->irq_lock); I915_WRITE(GEN6_PMIIR, GEN6_PM_RPS_EVENTS); } static void gen6_disable_rps(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; I915_WRITE(GEN6_RC_CONTROL, 0); I915_WRITE(GEN6_RPNSWREQ, 1 << 31); gen6_disable_rps_interrupts(dev); } static void valleyview_disable_rps(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; I915_WRITE(GEN6_RC_CONTROL, 0); gen6_disable_rps_interrupts(dev); if (dev_priv->vlv_pctx) { drm_gem_object_unreference(&dev_priv->vlv_pctx->base); dev_priv->vlv_pctx = NULL; } } static void intel_print_rc6_info(struct drm_device *dev, u32 mode) { if (IS_GEN6(dev)) DRM_DEBUG_DRIVER("Sandybridge: deep RC6 disabled\n"); if (IS_HASWELL(dev)) DRM_DEBUG_DRIVER("Haswell: only RC6 available\n"); DRM_INFO("Enabling RC6 states: RC6 %s, RC6p %s, RC6pp %s\n", (mode & GEN6_RC_CTL_RC6_ENABLE) ? "on" : "off", (mode & GEN6_RC_CTL_RC6p_ENABLE) ? "on" : "off", (mode & GEN6_RC_CTL_RC6pp_ENABLE) ? "on" : "off"); } int intel_enable_rc6(const struct drm_device *dev) { /* No RC6 before Ironlake */ if (INTEL_INFO(dev)->gen < 5) return 0; /* Respect the kernel parameter if it is set */ if (i915_enable_rc6 >= 0) return i915_enable_rc6; /* Disable RC6 on Ironlake */ if (INTEL_INFO(dev)->gen == 5) return 0; if (IS_HASWELL(dev)) return INTEL_RC6_ENABLE; /* snb/ivb have more than one rc6 state. */ if (INTEL_INFO(dev)->gen == 6) return INTEL_RC6_ENABLE; return (INTEL_RC6_ENABLE | INTEL_RC6p_ENABLE); } static void gen6_enable_rps_interrupts(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; u32 enabled_intrs; spin_lock_irq(&dev_priv->irq_lock); WARN_ON(dev_priv->rps.pm_iir); snb_enable_pm_irq(dev_priv, GEN6_PM_RPS_EVENTS); I915_WRITE(GEN6_PMIIR, GEN6_PM_RPS_EVENTS); spin_unlock_irq(&dev_priv->irq_lock); /* only unmask PM interrupts we need. Mask all others. */ enabled_intrs = GEN6_PM_RPS_EVENTS; /* IVB and SNB hard hangs on looping batchbuffer * if GEN6_PM_UP_EI_EXPIRED is masked. */ if (INTEL_INFO(dev)->gen <= 7 && !IS_HASWELL(dev)) enabled_intrs |= GEN6_PM_RP_UP_EI_EXPIRED; I915_WRITE(GEN6_PMINTRMSK, ~enabled_intrs); } static void gen8_enable_rps(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; struct intel_ring_buffer *ring; uint32_t rc6_mask = 0, rp_state_cap; int unused; /* 1a: Software RC state - RC0 */ I915_WRITE(GEN6_RC_STATE, 0); /* 1c & 1d: Get forcewake during program sequence. Although the driver * hasn't enabled a state yet where we need forcewake, BIOS may have.*/ gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL); /* 2a: Disable RC states. */ I915_WRITE(GEN6_RC_CONTROL, 0); rp_state_cap = I915_READ(GEN6_RP_STATE_CAP); /* 2b: Program RC6 thresholds.*/ I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 40 << 16); I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000); /* 12500 * 1280ns */ I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25); /* 25 * 1280ns */ for_each_ring(ring, dev_priv, unused) I915_WRITE(RING_MAX_IDLE(ring->mmio_base), 10); I915_WRITE(GEN6_RC_SLEEP, 0); I915_WRITE(GEN6_RC6_THRESHOLD, 50000); /* 50/125ms per EI */ /* 3: Enable RC6 */ if (intel_enable_rc6(dev) & INTEL_RC6_ENABLE) rc6_mask = GEN6_RC_CTL_RC6_ENABLE; DRM_INFO("RC6 %s\n", (rc6_mask & GEN6_RC_CTL_RC6_ENABLE) ? "on" : "off"); I915_WRITE(GEN6_RC_CONTROL, GEN6_RC_CTL_HW_ENABLE | GEN6_RC_CTL_EI_MODE(1) | rc6_mask); /* 4 Program defaults and thresholds for RPS*/ I915_WRITE(GEN6_RPNSWREQ, HSW_FREQUENCY(10)); /* Request 500 MHz */ I915_WRITE(GEN6_RC_VIDEO_FREQ, HSW_FREQUENCY(12)); /* Request 600 MHz */ /* NB: Docs say 1s, and 1000000 - which aren't equivalent */ I915_WRITE(GEN6_RP_DOWN_TIMEOUT, 100000000 / 128); /* 1 second timeout */ /* Docs recommend 900MHz, and 300 MHz respectively */ I915_WRITE(GEN6_RP_INTERRUPT_LIMITS, dev_priv->rps.max_delay << 24 | dev_priv->rps.min_delay << 16); I915_WRITE(GEN6_RP_UP_THRESHOLD, 7600000 / 128); /* 76ms busyness per EI, 90% */ I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 31300000 / 128); /* 313ms busyness per EI, 70%*/ I915_WRITE(GEN6_RP_UP_EI, 66000); /* 84.48ms, XXX: random? */ I915_WRITE(GEN6_RP_DOWN_EI, 350000); /* 448ms, XXX: random? */ I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10); /* 5: Enable RPS */ I915_WRITE(GEN6_RP_CONTROL, GEN6_RP_MEDIA_TURBO | GEN6_RP_MEDIA_HW_NORMAL_MODE | GEN6_RP_MEDIA_IS_GFX | GEN6_RP_ENABLE | GEN6_RP_UP_BUSY_AVG | GEN6_RP_DOWN_IDLE_AVG); /* 6: Ring frequency + overclocking (our driver does this later */ gen6_set_rps(dev, (I915_READ(GEN6_GT_PERF_STATUS) & 0xff00) >> 8); gen6_enable_rps_interrupts(dev); gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL); } static void gen6_enable_rps(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; struct intel_ring_buffer *ring; u32 rp_state_cap; u32 gt_perf_status; u32 rc6vids, pcu_mbox, rc6_mask = 0; u32 gtfifodbg; int rc6_mode; int i, ret; WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock)); /* Here begins a magic sequence of register writes to enable * auto-downclocking. * * Perhaps there might be some value in exposing these to * userspace... */ I915_WRITE(GEN6_RC_STATE, 0); /* Clear the DBG now so we don't confuse earlier errors */ if ((gtfifodbg = I915_READ(GTFIFODBG))) { DRM_ERROR("GT fifo had a previous error %x\n", gtfifodbg); I915_WRITE(GTFIFODBG, gtfifodbg); } gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL); rp_state_cap = I915_READ(GEN6_RP_STATE_CAP); gt_perf_status = I915_READ(GEN6_GT_PERF_STATUS); /* In units of 50MHz */ dev_priv->rps.hw_max = dev_priv->rps.max_delay = rp_state_cap & 0xff; dev_priv->rps.min_delay = (rp_state_cap >> 16) & 0xff; dev_priv->rps.rp1_delay = (rp_state_cap >> 8) & 0xff; dev_priv->rps.rp0_delay = (rp_state_cap >> 0) & 0xff; dev_priv->rps.rpe_delay = dev_priv->rps.rp1_delay; dev_priv->rps.cur_delay = 0; /* disable the counters and set deterministic thresholds */ I915_WRITE(GEN6_RC_CONTROL, 0); I915_WRITE(GEN6_RC1_WAKE_RATE_LIMIT, 1000 << 16); I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 40 << 16 | 30); I915_WRITE(GEN6_RC6pp_WAKE_RATE_LIMIT, 30); I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000); I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25); for_each_ring(ring, dev_priv, i) I915_WRITE(RING_MAX_IDLE(ring->mmio_base), 10); I915_WRITE(GEN6_RC_SLEEP, 0); I915_WRITE(GEN6_RC1e_THRESHOLD, 1000); if (IS_IVYBRIDGE(dev)) I915_WRITE(GEN6_RC6_THRESHOLD, 125000); else I915_WRITE(GEN6_RC6_THRESHOLD, 50000); I915_WRITE(GEN6_RC6p_THRESHOLD, 150000); I915_WRITE(GEN6_RC6pp_THRESHOLD, 64000); /* unused */ /* Check if we are enabling RC6 */ rc6_mode = intel_enable_rc6(dev_priv->dev); if (rc6_mode & INTEL_RC6_ENABLE) rc6_mask |= GEN6_RC_CTL_RC6_ENABLE; /* We don't use those on Haswell */ if (!IS_HASWELL(dev)) { if (rc6_mode & INTEL_RC6p_ENABLE) rc6_mask |= GEN6_RC_CTL_RC6p_ENABLE; if (rc6_mode & INTEL_RC6pp_ENABLE) rc6_mask |= GEN6_RC_CTL_RC6pp_ENABLE; } intel_print_rc6_info(dev, rc6_mask); I915_WRITE(GEN6_RC_CONTROL, rc6_mask | GEN6_RC_CTL_EI_MODE(1) | GEN6_RC_CTL_HW_ENABLE); /* Power down if completely idle for over 50ms */ I915_WRITE(GEN6_RP_DOWN_TIMEOUT, 50000); I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10); ret = sandybridge_pcode_write(dev_priv, GEN6_PCODE_WRITE_MIN_FREQ_TABLE, 0); if (!ret) { pcu_mbox = 0; ret = sandybridge_pcode_read(dev_priv, GEN6_READ_OC_PARAMS, &pcu_mbox); if (!ret && (pcu_mbox & (1<<31))) { /* OC supported */ DRM_DEBUG_DRIVER("Overclocking supported. Max: %dMHz, Overclock max: %dMHz\n", (dev_priv->rps.max_delay & 0xff) * 50, (pcu_mbox & 0xff) * 50); dev_priv->rps.hw_max = pcu_mbox & 0xff; } } else { DRM_DEBUG_DRIVER("Failed to set the min frequency\n"); } dev_priv->rps.power = HIGH_POWER; /* force a reset */ gen6_set_rps(dev_priv->dev, dev_priv->rps.min_delay); gen6_enable_rps_interrupts(dev); rc6vids = 0; ret = sandybridge_pcode_read(dev_priv, GEN6_PCODE_READ_RC6VIDS, &rc6vids); if (IS_GEN6(dev) && ret) { DRM_DEBUG_DRIVER("Couldn't check for BIOS workaround\n"); } else if (IS_GEN6(dev) && (GEN6_DECODE_RC6_VID(rc6vids & 0xff) < 450)) { DRM_DEBUG_DRIVER("You should update your BIOS. Correcting minimum rc6 voltage (%dmV->%dmV)\n", GEN6_DECODE_RC6_VID(rc6vids & 0xff), 450); rc6vids &= 0xffff00; rc6vids |= GEN6_ENCODE_RC6_VID(450); ret = sandybridge_pcode_write(dev_priv, GEN6_PCODE_WRITE_RC6VIDS, rc6vids); if (ret) DRM_ERROR("Couldn't fix incorrect rc6 voltage\n"); } gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL); } void gen6_update_ring_freq(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; int min_freq = 15; unsigned int gpu_freq; unsigned int max_ia_freq, min_ring_freq; int scaling_factor = 180; #ifdef notyet struct cpufreq_policy *policy; #endif WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock)); #ifdef notyet policy = cpufreq_cpu_get(0); if (policy) { max_ia_freq = policy->cpuinfo.max_freq; cpufreq_cpu_put(policy); } else { /* * Default to measured freq if none found, PCU will ensure we * don't go over */ max_ia_freq = tsc_khz; } #else /* XXX we ideally want the max not cpuspeed... */ max_ia_freq = cpuspeed; #endif /* Convert from kHz to MHz */ max_ia_freq /= 1000; min_ring_freq = I915_READ(DCLK) & 0xf; /* convert DDR frequency from units of 266.6MHz to bandwidth */ min_ring_freq = mult_frac(min_ring_freq, 8, 3); /* * For each potential GPU frequency, load a ring frequency we'd like * to use for memory access. We do this by specifying the IA frequency * the PCU should use as a reference to determine the ring frequency. */ for (gpu_freq = dev_priv->rps.max_delay; gpu_freq >= dev_priv->rps.min_delay; gpu_freq--) { int diff = dev_priv->rps.max_delay - gpu_freq; unsigned int ia_freq = 0, ring_freq = 0; if (INTEL_INFO(dev)->gen >= 8) { /* max(2 * GT, DDR). NB: GT is 50MHz units */ ring_freq = max(min_ring_freq, gpu_freq); } else if (IS_HASWELL(dev)) { ring_freq = mult_frac(gpu_freq, 5, 4); ring_freq = max(min_ring_freq, ring_freq); /* leave ia_freq as the default, chosen by cpufreq */ } else { /* On older processors, there is no separate ring * clock domain, so in order to boost the bandwidth * of the ring, we need to upclock the CPU (ia_freq). * * For GPU frequencies less than 750MHz, * just use the lowest ring freq. */ if (gpu_freq < min_freq) ia_freq = 800; else ia_freq = max_ia_freq - ((diff * scaling_factor) / 2); ia_freq = DIV_ROUND_CLOSEST(ia_freq, 100); } sandybridge_pcode_write(dev_priv, GEN6_PCODE_WRITE_MIN_FREQ_TABLE, ia_freq << GEN6_PCODE_FREQ_IA_RATIO_SHIFT | ring_freq << GEN6_PCODE_FREQ_RING_RATIO_SHIFT | gpu_freq); } } int valleyview_rps_max_freq(struct drm_i915_private *dev_priv) { u32 val, rp0; val = vlv_nc_read(dev_priv, IOSF_NC_FB_GFX_FREQ_FUSE); rp0 = (val & FB_GFX_MAX_FREQ_FUSE_MASK) >> FB_GFX_MAX_FREQ_FUSE_SHIFT; /* Clamp to max */ rp0 = min_t(u32, rp0, 0xea); return rp0; } static int valleyview_rps_rpe_freq(struct drm_i915_private *dev_priv) { u32 val, rpe; val = vlv_nc_read(dev_priv, IOSF_NC_FB_GFX_FMAX_FUSE_LO); rpe = (val & FB_FMAX_VMIN_FREQ_LO_MASK) >> FB_FMAX_VMIN_FREQ_LO_SHIFT; val = vlv_nc_read(dev_priv, IOSF_NC_FB_GFX_FMAX_FUSE_HI); rpe |= (val & FB_FMAX_VMIN_FREQ_HI_MASK) << 5; return rpe; } int valleyview_rps_min_freq(struct drm_i915_private *dev_priv) { return vlv_punit_read(dev_priv, PUNIT_REG_GPU_LFM) & 0xff; } static void valleyview_setup_pctx(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; struct drm_i915_gem_object *pctx; unsigned long pctx_paddr; u32 pcbr; int pctx_size = 24*1024; WARN_ON(!mutex_is_locked(&dev->struct_mutex)); pcbr = I915_READ(VLV_PCBR); if (pcbr) { /* BIOS set it up already, grab the pre-alloc'd space */ int pcbr_offset; pcbr_offset = (pcbr & (~4095)) - dev_priv->mm.stolen_base; pctx = i915_gem_object_create_stolen_for_preallocated(dev_priv->dev, pcbr_offset, I915_GTT_OFFSET_NONE, pctx_size); goto out; } /* * From the Gunit register HAS: * The Gfx driver is expected to program this register and ensure * proper allocation within Gfx stolen memory. For example, this * register should be programmed such than the PCBR range does not * overlap with other ranges, such as the frame buffer, protected * memory, or any other relevant ranges. */ pctx = i915_gem_object_create_stolen(dev, pctx_size); if (!pctx) { DRM_DEBUG("not enough stolen space for PCTX, disabling\n"); return; } pctx_paddr = dev_priv->mm.stolen_base + pctx->stolen->start; I915_WRITE(VLV_PCBR, pctx_paddr); out: dev_priv->vlv_pctx = pctx; } static void valleyview_enable_rps(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; struct intel_ring_buffer *ring; u32 gtfifodbg, val, rc6_mode = 0; int i; WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock)); if ((gtfifodbg = I915_READ(GTFIFODBG))) { DRM_DEBUG_DRIVER("GT fifo had a previous error %x\n", gtfifodbg); I915_WRITE(GTFIFODBG, gtfifodbg); } /* If VLV, Forcewake all wells, else re-direct to regular path */ gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL); I915_WRITE(GEN6_RP_UP_THRESHOLD, 59400); I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 245000); I915_WRITE(GEN6_RP_UP_EI, 66000); I915_WRITE(GEN6_RP_DOWN_EI, 350000); I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10); I915_WRITE(GEN6_RP_CONTROL, GEN6_RP_MEDIA_TURBO | GEN6_RP_MEDIA_HW_NORMAL_MODE | GEN6_RP_MEDIA_IS_GFX | GEN6_RP_ENABLE | GEN6_RP_UP_BUSY_AVG | GEN6_RP_DOWN_IDLE_CONT); I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 0x00280000); I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000); I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25); for_each_ring(ring, dev_priv, i) I915_WRITE(RING_MAX_IDLE(ring->mmio_base), 10); I915_WRITE(GEN6_RC6_THRESHOLD, 0x557); /* allows RC6 residency counter to work */ I915_WRITE(VLV_COUNTER_CONTROL, _MASKED_BIT_ENABLE(VLV_COUNT_RANGE_HIGH | VLV_MEDIA_RC6_COUNT_EN | VLV_RENDER_RC6_COUNT_EN)); if (intel_enable_rc6(dev) & INTEL_RC6_ENABLE) rc6_mode = GEN7_RC_CTL_TO_MODE | VLV_RC_CTL_CTX_RST_PARALLEL; intel_print_rc6_info(dev, rc6_mode); I915_WRITE(GEN6_RC_CONTROL, rc6_mode); val = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS); DRM_DEBUG_DRIVER("GPLL enabled? %s\n", val & 0x10 ? "yes" : "no"); DRM_DEBUG_DRIVER("GPU status: 0x%08x\n", val); dev_priv->rps.cur_delay = (val >> 8) & 0xff; DRM_DEBUG_DRIVER("current GPU freq: %d MHz (%u)\n", vlv_gpu_freq(dev_priv, dev_priv->rps.cur_delay), dev_priv->rps.cur_delay); dev_priv->rps.max_delay = valleyview_rps_max_freq(dev_priv); dev_priv->rps.hw_max = dev_priv->rps.max_delay; DRM_DEBUG_DRIVER("max GPU freq: %d MHz (%u)\n", vlv_gpu_freq(dev_priv, dev_priv->rps.max_delay), dev_priv->rps.max_delay); dev_priv->rps.rpe_delay = valleyview_rps_rpe_freq(dev_priv); DRM_DEBUG_DRIVER("RPe GPU freq: %d MHz (%u)\n", vlv_gpu_freq(dev_priv, dev_priv->rps.rpe_delay), dev_priv->rps.rpe_delay); dev_priv->rps.min_delay = valleyview_rps_min_freq(dev_priv); DRM_DEBUG_DRIVER("min GPU freq: %d MHz (%u)\n", vlv_gpu_freq(dev_priv, dev_priv->rps.min_delay), dev_priv->rps.min_delay); DRM_DEBUG_DRIVER("setting GPU freq to %d MHz (%u)\n", vlv_gpu_freq(dev_priv, dev_priv->rps.rpe_delay), dev_priv->rps.rpe_delay); valleyview_set_rps(dev_priv->dev, dev_priv->rps.rpe_delay); gen6_enable_rps_interrupts(dev); gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL); } void ironlake_teardown_rc6(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; if (dev_priv->ips.renderctx) { i915_gem_object_unpin(dev_priv->ips.renderctx); drm_gem_object_unreference(&dev_priv->ips.renderctx->base); dev_priv->ips.renderctx = NULL; } if (dev_priv->ips.pwrctx) { i915_gem_object_unpin(dev_priv->ips.pwrctx); drm_gem_object_unreference(&dev_priv->ips.pwrctx->base); dev_priv->ips.pwrctx = NULL; } } static void ironlake_disable_rc6(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; if (I915_READ(PWRCTXA)) { /* Wake the GPU, prevent RC6, then restore RSTDBYCTL */ I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) | RCX_SW_EXIT); wait_for(((I915_READ(RSTDBYCTL) & RSX_STATUS_MASK) == RSX_STATUS_ON), 50); I915_WRITE(PWRCTXA, 0); POSTING_READ(PWRCTXA); I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) & ~RCX_SW_EXIT); POSTING_READ(RSTDBYCTL); } } static int ironlake_setup_rc6(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; if (dev_priv->ips.renderctx == NULL) dev_priv->ips.renderctx = intel_alloc_context_page(dev); if (!dev_priv->ips.renderctx) return -ENOMEM; if (dev_priv->ips.pwrctx == NULL) dev_priv->ips.pwrctx = intel_alloc_context_page(dev); if (!dev_priv->ips.pwrctx) { ironlake_teardown_rc6(dev); return -ENOMEM; } return 0; } static void ironlake_enable_rc6(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; struct intel_ring_buffer *ring = &dev_priv->ring[RCS]; bool was_interruptible; int ret; /* rc6 disabled by default due to repeated reports of hanging during * boot and resume. */ if (!intel_enable_rc6(dev)) return; WARN_ON(!mutex_is_locked(&dev->struct_mutex)); ret = ironlake_setup_rc6(dev); if (ret) return; was_interruptible = dev_priv->mm.interruptible; dev_priv->mm.interruptible = false; /* * GPU can automatically power down the render unit if given a page * to save state. */ ret = intel_ring_begin(ring, 6); if (ret) { ironlake_teardown_rc6(dev); dev_priv->mm.interruptible = was_interruptible; return; } intel_ring_emit(ring, MI_SUSPEND_FLUSH | MI_SUSPEND_FLUSH_EN); intel_ring_emit(ring, MI_SET_CONTEXT); intel_ring_emit(ring, i915_gem_obj_ggtt_offset(dev_priv->ips.renderctx) | MI_MM_SPACE_GTT | MI_SAVE_EXT_STATE_EN | MI_RESTORE_EXT_STATE_EN | MI_RESTORE_INHIBIT); intel_ring_emit(ring, MI_SUSPEND_FLUSH); intel_ring_emit(ring, MI_NOOP); intel_ring_emit(ring, MI_FLUSH); intel_ring_advance(ring); /* * Wait for the command parser to advance past MI_SET_CONTEXT. The HW * does an implicit flush, combined with MI_FLUSH above, it should be * safe to assume that renderctx is valid */ ret = intel_ring_idle(ring); dev_priv->mm.interruptible = was_interruptible; if (ret) { DRM_ERROR("failed to enable ironlake power savings\n"); ironlake_teardown_rc6(dev); return; } I915_WRITE(PWRCTXA, i915_gem_obj_ggtt_offset(dev_priv->ips.pwrctx) | PWRCTX_EN); I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) & ~RCX_SW_EXIT); intel_print_rc6_info(dev, INTEL_RC6_ENABLE); } static unsigned long intel_pxfreq(u32 vidfreq) { unsigned long freq; int div = (vidfreq & 0x3f0000) >> 16; int post = (vidfreq & 0x3000) >> 12; int pre = (vidfreq & 0x7); if (!pre) return 0; freq = ((div * 133333) / ((1<ips.last_time1; /* Prevent division-by-zero if we are asking too fast. * Also, we don't get interesting results if we are polling * faster than once in 10ms, so just return the saved value * in such cases. */ if (diff1 <= 10) return dev_priv->ips.chipset_power; count1 = I915_READ(DMIEC); count2 = I915_READ(DDREC); count3 = I915_READ(CSIEC); total_count = count1 + count2 + count3; /* FIXME: handle per-counter overflow */ if (total_count < dev_priv->ips.last_count1) { diff = ~0UL - dev_priv->ips.last_count1; diff += total_count; } else { diff = total_count - dev_priv->ips.last_count1; } for (i = 0; i < ARRAY_SIZE(cparams); i++) { if (cparams[i].i == dev_priv->ips.c_m && cparams[i].t == dev_priv->ips.r_t) { m = cparams[i].m; c = cparams[i].c; break; } } diff = div_u64(diff, diff1); ret = ((m * diff) + c); ret = div_u64(ret, 10); dev_priv->ips.last_count1 = total_count; dev_priv->ips.last_time1 = now; dev_priv->ips.chipset_power = ret; return ret; } unsigned long i915_chipset_val(struct drm_i915_private *dev_priv) { unsigned long val; if (dev_priv->info->gen != 5) return 0; spin_lock_irq(&mchdev_lock); val = __i915_chipset_val(dev_priv); spin_unlock_irq(&mchdev_lock); return val; } unsigned long i915_mch_val(struct drm_i915_private *dev_priv) { unsigned long m, x, b; u32 tsfs; tsfs = I915_READ(TSFS); m = ((tsfs & TSFS_SLOPE_MASK) >> TSFS_SLOPE_SHIFT); x = I915_READ8(TR1); b = tsfs & TSFS_INTR_MASK; return ((m * x) / 127) - b; } static u16 pvid_to_extvid(struct drm_i915_private *dev_priv, u8 pxvid) { static const struct v_table { u16 vd; /* in .1 mil */ u16 vm; /* in .1 mil */ } v_table[] = { { 0, 0, }, { 375, 0, }, { 500, 0, }, { 625, 0, }, { 750, 0, }, { 875, 0, }, { 1000, 0, }, { 1125, 0, }, { 4125, 3000, }, { 4125, 3000, }, { 4125, 3000, }, { 4125, 3000, }, { 4125, 3000, }, { 4125, 3000, }, { 4125, 3000, }, { 4125, 3000, }, { 4125, 3000, }, { 4125, 3000, }, { 4125, 3000, }, { 4125, 3000, }, { 4125, 3000, }, { 4125, 3000, }, { 4125, 3000, }, { 4125, 3000, }, { 4125, 3000, }, { 4125, 3000, }, { 4125, 3000, }, { 4125, 3000, }, { 4125, 3000, }, { 4125, 3000, }, { 4125, 3000, }, { 4125, 3000, }, { 4250, 3125, }, { 4375, 3250, }, { 4500, 3375, }, { 4625, 3500, }, { 4750, 3625, }, { 4875, 3750, }, { 5000, 3875, }, { 5125, 4000, }, { 5250, 4125, }, { 5375, 4250, }, { 5500, 4375, }, { 5625, 4500, }, { 5750, 4625, }, { 5875, 4750, }, { 6000, 4875, }, { 6125, 5000, }, { 6250, 5125, }, { 6375, 5250, }, { 6500, 5375, }, { 6625, 5500, }, { 6750, 5625, }, { 6875, 5750, }, { 7000, 5875, }, { 7125, 6000, }, { 7250, 6125, }, { 7375, 6250, }, { 7500, 6375, }, { 7625, 6500, }, { 7750, 6625, }, { 7875, 6750, }, { 8000, 6875, }, { 8125, 7000, }, { 8250, 7125, }, { 8375, 7250, }, { 8500, 7375, }, { 8625, 7500, }, { 8750, 7625, }, { 8875, 7750, }, { 9000, 7875, }, { 9125, 8000, }, { 9250, 8125, }, { 9375, 8250, }, { 9500, 8375, }, { 9625, 8500, }, { 9750, 8625, }, { 9875, 8750, }, { 10000, 8875, }, { 10125, 9000, }, { 10250, 9125, }, { 10375, 9250, }, { 10500, 9375, }, { 10625, 9500, }, { 10750, 9625, }, { 10875, 9750, }, { 11000, 9875, }, { 11125, 10000, }, { 11250, 10125, }, { 11375, 10250, }, { 11500, 10375, }, { 11625, 10500, }, { 11750, 10625, }, { 11875, 10750, }, { 12000, 10875, }, { 12125, 11000, }, { 12250, 11125, }, { 12375, 11250, }, { 12500, 11375, }, { 12625, 11500, }, { 12750, 11625, }, { 12875, 11750, }, { 13000, 11875, }, { 13125, 12000, }, { 13250, 12125, }, { 13375, 12250, }, { 13500, 12375, }, { 13625, 12500, }, { 13750, 12625, }, { 13875, 12750, }, { 14000, 12875, }, { 14125, 13000, }, { 14250, 13125, }, { 14375, 13250, }, { 14500, 13375, }, { 14625, 13500, }, { 14750, 13625, }, { 14875, 13750, }, { 15000, 13875, }, { 15125, 14000, }, { 15250, 14125, }, { 15375, 14250, }, { 15500, 14375, }, { 15625, 14500, }, { 15750, 14625, }, { 15875, 14750, }, { 16000, 14875, }, { 16125, 15000, }, }; if (dev_priv->info->is_mobile) return v_table[pxvid].vm; else return v_table[pxvid].vd; } static void __i915_update_gfx_val(struct drm_i915_private *dev_priv) { struct timespec now, diff1; u64 diff; unsigned long diffms; u32 count; assert_spin_locked(&mchdev_lock); getrawmonotonic(&now); diff1 = timespec_sub(now, dev_priv->ips.last_time2); /* Don't divide by 0 */ diffms = diff1.tv_sec * 1000 + diff1.tv_nsec / 1000000; if (!diffms) return; count = I915_READ(GFXEC); if (count < dev_priv->ips.last_count2) { diff = ~0UL - dev_priv->ips.last_count2; diff += count; } else { diff = count - dev_priv->ips.last_count2; } dev_priv->ips.last_count2 = count; dev_priv->ips.last_time2 = now; /* More magic constants... */ diff = diff * 1181; diff = div_u64(diff, diffms * 10); dev_priv->ips.gfx_power = diff; } void i915_update_gfx_val(struct drm_i915_private *dev_priv) { if (dev_priv->info->gen != 5) return; spin_lock_irq(&mchdev_lock); __i915_update_gfx_val(dev_priv); spin_unlock_irq(&mchdev_lock); } static unsigned long __i915_gfx_val(struct drm_i915_private *dev_priv) { unsigned long t, corr, state1, corr2, state2; u32 pxvid, ext_v; assert_spin_locked(&mchdev_lock); pxvid = I915_READ(PXVFREQ_BASE + (dev_priv->rps.cur_delay * 4)); pxvid = (pxvid >> 24) & 0x7f; ext_v = pvid_to_extvid(dev_priv, pxvid); state1 = ext_v; t = i915_mch_val(dev_priv); /* Revel in the empirically derived constants */ /* Correction factor in 1/100000 units */ if (t > 80) corr = ((t * 2349) + 135940); else if (t >= 50) corr = ((t * 964) + 29317); else /* < 50 */ corr = ((t * 301) + 1004); corr = corr * ((150142 * state1) / 10000 - 78642); corr /= 100000; corr2 = (corr * dev_priv->ips.corr); state2 = (corr2 * state1) / 10000; state2 /= 100; /* convert to mW */ __i915_update_gfx_val(dev_priv); return dev_priv->ips.gfx_power + state2; } unsigned long i915_gfx_val(struct drm_i915_private *dev_priv) { unsigned long val; if (dev_priv->info->gen != 5) return 0; spin_lock_irq(&mchdev_lock); val = __i915_gfx_val(dev_priv); spin_unlock_irq(&mchdev_lock); return val; } /** * i915_read_mch_val - return value for IPS use * * Calculate and return a value for the IPS driver to use when deciding whether * we have thermal and power headroom to increase CPU or GPU power budget. */ unsigned long i915_read_mch_val(void) { struct drm_i915_private *dev_priv; unsigned long chipset_val, graphics_val, ret = 0; spin_lock_irq(&mchdev_lock); if (!i915_mch_dev) goto out_unlock; dev_priv = i915_mch_dev; chipset_val = __i915_chipset_val(dev_priv); graphics_val = __i915_gfx_val(dev_priv); ret = chipset_val + graphics_val; out_unlock: spin_unlock_irq(&mchdev_lock); return ret; } /** * i915_gpu_raise - raise GPU frequency limit * * Raise the limit; IPS indicates we have thermal headroom. */ bool i915_gpu_raise(void) { struct drm_i915_private *dev_priv; bool ret = true; spin_lock_irq(&mchdev_lock); if (!i915_mch_dev) { ret = false; goto out_unlock; } dev_priv = i915_mch_dev; if (dev_priv->ips.max_delay > dev_priv->ips.fmax) dev_priv->ips.max_delay--; out_unlock: spin_unlock_irq(&mchdev_lock); return ret; } /** * i915_gpu_lower - lower GPU frequency limit * * IPS indicates we're close to a thermal limit, so throttle back the GPU * frequency maximum. */ bool i915_gpu_lower(void) { struct drm_i915_private *dev_priv; bool ret = true; spin_lock_irq(&mchdev_lock); if (!i915_mch_dev) { ret = false; goto out_unlock; } dev_priv = i915_mch_dev; if (dev_priv->ips.max_delay < dev_priv->ips.min_delay) dev_priv->ips.max_delay++; out_unlock: spin_unlock_irq(&mchdev_lock); return ret; } /** * i915_gpu_busy - indicate GPU business to IPS * * Tell the IPS driver whether or not the GPU is busy. */ bool i915_gpu_busy(void) { struct drm_i915_private *dev_priv; struct intel_ring_buffer *ring; bool ret = false; int i; spin_lock_irq(&mchdev_lock); if (!i915_mch_dev) goto out_unlock; dev_priv = i915_mch_dev; for_each_ring(ring, dev_priv, i) ret |= !list_empty(&ring->request_list); out_unlock: spin_unlock_irq(&mchdev_lock); return ret; } /** * i915_gpu_turbo_disable - disable graphics turbo * * Disable graphics turbo by resetting the max frequency and setting the * current frequency to the default. */ bool i915_gpu_turbo_disable(void) { struct drm_i915_private *dev_priv; bool ret = true; spin_lock_irq(&mchdev_lock); if (!i915_mch_dev) { ret = false; goto out_unlock; } dev_priv = i915_mch_dev; dev_priv->ips.max_delay = dev_priv->ips.fstart; if (!ironlake_set_drps(dev_priv->dev, dev_priv->ips.fstart)) ret = false; out_unlock: spin_unlock_irq(&mchdev_lock); return ret; } /** * Tells the intel_ips driver that the i915 driver is now loaded, if * IPS got loaded first. * * This awkward dance is so that neither module has to depend on the * other in order for IPS to do the appropriate communication of * GPU turbo limits to i915. */ static void ips_ping_for_i915_load(void) { #ifdef notyet void (*link)(void); link = symbol_get(ips_link_to_i915_driver); if (link) { link(); symbol_put(ips_link_to_i915_driver); } #endif } void intel_gpu_ips_init(struct drm_i915_private *dev_priv) { /* We only register the i915 ips part with intel-ips once everything is * set up, to avoid intel-ips sneaking in and reading bogus values. */ spin_lock_irq(&mchdev_lock); i915_mch_dev = dev_priv; spin_unlock_irq(&mchdev_lock); ips_ping_for_i915_load(); } void intel_gpu_ips_teardown(void) { spin_lock_irq(&mchdev_lock); i915_mch_dev = NULL; spin_unlock_irq(&mchdev_lock); } static void intel_init_emon(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; u32 lcfuse; u8 pxw[16]; int i; /* Disable to program */ I915_WRITE(ECR, 0); POSTING_READ(ECR); /* Program energy weights for various events */ I915_WRITE(SDEW, 0x15040d00); I915_WRITE(CSIEW0, 0x007f0000); I915_WRITE(CSIEW1, 0x1e220004); I915_WRITE(CSIEW2, 0x04000004); for (i = 0; i < 5; i++) I915_WRITE(PEW + (i * 4), 0); for (i = 0; i < 3; i++) I915_WRITE(DEW + (i * 4), 0); /* Program P-state weights to account for frequency power adjustment */ for (i = 0; i < 16; i++) { u32 pxvidfreq = I915_READ(PXVFREQ_BASE + (i * 4)); unsigned long freq = intel_pxfreq(pxvidfreq); unsigned long vid = (pxvidfreq & PXVFREQ_PX_MASK) >> PXVFREQ_PX_SHIFT; unsigned long val; val = vid * vid; val *= (freq / 1000); val *= 255; val /= (127*127*900); if (val > 0xff) DRM_ERROR("bad pxval: %ld\n", val); pxw[i] = val; } /* Render standby states get 0 weight */ pxw[14] = 0; pxw[15] = 0; for (i = 0; i < 4; i++) { u32 val = (pxw[i*4] << 24) | (pxw[(i*4)+1] << 16) | (pxw[(i*4)+2] << 8) | (pxw[(i*4)+3]); I915_WRITE(PXW + (i * 4), val); } /* Adjust magic regs to magic values (more experimental results) */ I915_WRITE(OGW0, 0); I915_WRITE(OGW1, 0); I915_WRITE(EG0, 0x00007f00); I915_WRITE(EG1, 0x0000000e); I915_WRITE(EG2, 0x000e0000); I915_WRITE(EG3, 0x68000300); I915_WRITE(EG4, 0x42000000); I915_WRITE(EG5, 0x00140031); I915_WRITE(EG6, 0); I915_WRITE(EG7, 0); for (i = 0; i < 8; i++) I915_WRITE(PXWL + (i * 4), 0); /* Enable PMON + select events */ I915_WRITE(ECR, 0x80000019); lcfuse = I915_READ(LCFUSE02); dev_priv->ips.corr = (lcfuse & LCFUSE_HIV_MASK); } void intel_disable_gt_powersave(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; /* Interrupts should be disabled already to avoid re-arming. */ WARN_ON(dev->irq_enabled); if (IS_IRONLAKE_M(dev)) { ironlake_disable_drps(dev); ironlake_disable_rc6(dev); } else if (INTEL_INFO(dev)->gen >= 6) { cancel_delayed_work_sync(&dev_priv->rps.delayed_resume_work); cancel_work_sync(&dev_priv->rps.work); mutex_lock(&dev_priv->rps.hw_lock); if (IS_VALLEYVIEW(dev)) valleyview_disable_rps(dev); else gen6_disable_rps(dev); dev_priv->rps.enabled = false; mutex_unlock(&dev_priv->rps.hw_lock); } } static void intel_gen6_powersave_work(struct work_struct *work) { struct drm_i915_private *dev_priv = container_of(work, struct drm_i915_private, rps.delayed_resume_work.work); struct drm_device *dev = dev_priv->dev; mutex_lock(&dev_priv->rps.hw_lock); if (IS_VALLEYVIEW(dev)) { valleyview_enable_rps(dev); } else if (IS_BROADWELL(dev)) { gen8_enable_rps(dev); gen6_update_ring_freq(dev); } else { gen6_enable_rps(dev); gen6_update_ring_freq(dev); } dev_priv->rps.enabled = true; mutex_unlock(&dev_priv->rps.hw_lock); } void intel_enable_gt_powersave(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; if (IS_IRONLAKE_M(dev)) { ironlake_enable_drps(dev); ironlake_enable_rc6(dev); intel_init_emon(dev); } else if (IS_GEN6(dev) || IS_GEN7(dev)) { if (IS_VALLEYVIEW(dev)) valleyview_setup_pctx(dev); /* * PCU communication is slow and this doesn't need to be * done at any specific time, so do this out of our fast path * to make resume and init faster. */ schedule_delayed_work(&dev_priv->rps.delayed_resume_work, round_jiffies_up_relative(HZ)); } } static void ibx_init_clock_gating(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; /* * On Ibex Peak and Cougar Point, we need to disable clock * gating for the panel power sequencer or it will fail to * start up when no ports are active. */ I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE); } static void g4x_disable_trickle_feed(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; int pipe; for_each_pipe(pipe) { I915_WRITE(DSPCNTR(pipe), I915_READ(DSPCNTR(pipe)) | DISPPLANE_TRICKLE_FEED_DISABLE); intel_flush_primary_plane(dev_priv, pipe); } } static void ilk_init_lp_watermarks(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; I915_WRITE(WM3_LP_ILK, I915_READ(WM3_LP_ILK) & ~WM1_LP_SR_EN); I915_WRITE(WM2_LP_ILK, I915_READ(WM2_LP_ILK) & ~WM1_LP_SR_EN); I915_WRITE(WM1_LP_ILK, I915_READ(WM1_LP_ILK) & ~WM1_LP_SR_EN); /* * Don't touch WM1S_LP_EN here. * Doing so could cause underruns. */ } static void ironlake_init_clock_gating(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; uint32_t dspclk_gate = ILK_VRHUNIT_CLOCK_GATE_DISABLE; /* * Required for FBC * WaFbcDisableDpfcClockGating:ilk */ dspclk_gate |= ILK_DPFCRUNIT_CLOCK_GATE_DISABLE | ILK_DPFCUNIT_CLOCK_GATE_DISABLE | ILK_DPFDUNIT_CLOCK_GATE_ENABLE; I915_WRITE(PCH_3DCGDIS0, MARIUNIT_CLOCK_GATE_DISABLE | SVSMUNIT_CLOCK_GATE_DISABLE); I915_WRITE(PCH_3DCGDIS1, VFMUNIT_CLOCK_GATE_DISABLE); /* * According to the spec the following bits should be set in * order to enable memory self-refresh * The bit 22/21 of 0x42004 * The bit 5 of 0x42020 * The bit 15 of 0x45000 */ I915_WRITE(ILK_DISPLAY_CHICKEN2, (I915_READ(ILK_DISPLAY_CHICKEN2) | ILK_DPARB_GATE | ILK_VSDPFD_FULL)); dspclk_gate |= ILK_DPARBUNIT_CLOCK_GATE_ENABLE; I915_WRITE(DISP_ARB_CTL, (I915_READ(DISP_ARB_CTL) | DISP_FBC_WM_DIS)); ilk_init_lp_watermarks(dev); /* * Based on the document from hardware guys the following bits * should be set unconditionally in order to enable FBC. * The bit 22 of 0x42000 * The bit 22 of 0x42004 * The bit 7,8,9 of 0x42020. */ if (IS_IRONLAKE_M(dev)) { /* WaFbcAsynchFlipDisableFbcQueue:ilk */ I915_WRITE(ILK_DISPLAY_CHICKEN1, I915_READ(ILK_DISPLAY_CHICKEN1) | ILK_FBCQ_DIS); I915_WRITE(ILK_DISPLAY_CHICKEN2, I915_READ(ILK_DISPLAY_CHICKEN2) | ILK_DPARB_GATE); } I915_WRITE(ILK_DSPCLK_GATE_D, dspclk_gate); I915_WRITE(ILK_DISPLAY_CHICKEN2, I915_READ(ILK_DISPLAY_CHICKEN2) | ILK_ELPIN_409_SELECT); I915_WRITE(_3D_CHICKEN2, _3D_CHICKEN2_WM_READ_PIPELINED << 16 | _3D_CHICKEN2_WM_READ_PIPELINED); /* WaDisableRenderCachePipelinedFlush:ilk */ I915_WRITE(CACHE_MODE_0, _MASKED_BIT_ENABLE(CM0_PIPELINED_RENDER_FLUSH_DISABLE)); g4x_disable_trickle_feed(dev); ibx_init_clock_gating(dev); } static void cpt_init_clock_gating(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; int pipe; uint32_t val; /* * On Ibex Peak and Cougar Point, we need to disable clock * gating for the panel power sequencer or it will fail to * start up when no ports are active. */ I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE | PCH_DPLUNIT_CLOCK_GATE_DISABLE | PCH_CPUNIT_CLOCK_GATE_DISABLE); I915_WRITE(SOUTH_CHICKEN2, I915_READ(SOUTH_CHICKEN2) | DPLS_EDP_PPS_FIX_DIS); /* The below fixes the weird display corruption, a few pixels shifted * downward, on (only) LVDS of some HP laptops with IVY. */ for_each_pipe(pipe) { val = I915_READ(TRANS_CHICKEN2(pipe)); val |= TRANS_CHICKEN2_TIMING_OVERRIDE; val &= ~TRANS_CHICKEN2_FDI_POLARITY_REVERSED; if (dev_priv->vbt.fdi_rx_polarity_inverted) val |= TRANS_CHICKEN2_FDI_POLARITY_REVERSED; val &= ~TRANS_CHICKEN2_FRAME_START_DELAY_MASK; val &= ~TRANS_CHICKEN2_DISABLE_DEEP_COLOR_COUNTER; val &= ~TRANS_CHICKEN2_DISABLE_DEEP_COLOR_MODESWITCH; I915_WRITE(TRANS_CHICKEN2(pipe), val); } /* WADP0ClockGatingDisable */ for_each_pipe(pipe) { I915_WRITE(TRANS_CHICKEN1(pipe), TRANS_CHICKEN1_DP0UNIT_GC_DISABLE); } } static void gen6_check_mch_setup(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; uint32_t tmp; tmp = I915_READ(MCH_SSKPD); if ((tmp & MCH_SSKPD_WM0_MASK) != MCH_SSKPD_WM0_VAL) { DRM_INFO("Wrong MCH_SSKPD value: 0x%08x\n", tmp); DRM_INFO("This can cause pipe underruns and display issues.\n"); DRM_INFO("Please upgrade your BIOS to fix this.\n"); } } static void gen6_init_clock_gating(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; uint32_t dspclk_gate = ILK_VRHUNIT_CLOCK_GATE_DISABLE; I915_WRITE(ILK_DSPCLK_GATE_D, dspclk_gate); I915_WRITE(ILK_DISPLAY_CHICKEN2, I915_READ(ILK_DISPLAY_CHICKEN2) | ILK_ELPIN_409_SELECT); /* WaDisableHiZPlanesWhenMSAAEnabled:snb */ I915_WRITE(_3D_CHICKEN, _MASKED_BIT_ENABLE(_3D_CHICKEN_HIZ_PLANE_DISABLE_MSAA_4X_SNB)); /* WaSetupGtModeTdRowDispatch:snb */ if (IS_SNB_GT1(dev)) I915_WRITE(GEN6_GT_MODE, _MASKED_BIT_ENABLE(GEN6_TD_FOUR_ROW_DISPATCH_DISABLE)); ilk_init_lp_watermarks(dev); I915_WRITE(CACHE_MODE_0, _MASKED_BIT_DISABLE(CM0_STC_EVICT_DISABLE_LRA_SNB)); I915_WRITE(GEN6_UCGCTL1, I915_READ(GEN6_UCGCTL1) | GEN6_BLBUNIT_CLOCK_GATE_DISABLE | GEN6_CSUNIT_CLOCK_GATE_DISABLE); /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock * gating disable must be set. Failure to set it results in * flickering pixels due to Z write ordering failures after * some amount of runtime in the Mesa "fire" demo, and Unigine * Sanctuary and Tropics, and apparently anything else with * alpha test or pixel discard. * * According to the spec, bit 11 (RCCUNIT) must also be set, * but we didn't debug actual testcases to find it out. * * Also apply WaDisableVDSUnitClockGating:snb and * WaDisableRCPBUnitClockGating:snb. */ I915_WRITE(GEN6_UCGCTL2, GEN7_VDSUNIT_CLOCK_GATE_DISABLE | GEN6_RCPBUNIT_CLOCK_GATE_DISABLE | GEN6_RCCUNIT_CLOCK_GATE_DISABLE); /* Bspec says we need to always set all mask bits. */ I915_WRITE(_3D_CHICKEN3, (0xFFFF << 16) | _3D_CHICKEN3_SF_DISABLE_FASTCLIP_CULL); /* * According to the spec the following bits should be * set in order to enable memory self-refresh and fbc: * The bit21 and bit22 of 0x42000 * The bit21 and bit22 of 0x42004 * The bit5 and bit7 of 0x42020 * The bit14 of 0x70180 * The bit14 of 0x71180 * * WaFbcAsynchFlipDisableFbcQueue:snb */ I915_WRITE(ILK_DISPLAY_CHICKEN1, I915_READ(ILK_DISPLAY_CHICKEN1) | ILK_FBCQ_DIS | ILK_PABSTRETCH_DIS); I915_WRITE(ILK_DISPLAY_CHICKEN2, I915_READ(ILK_DISPLAY_CHICKEN2) | ILK_DPARB_GATE | ILK_VSDPFD_FULL); I915_WRITE(ILK_DSPCLK_GATE_D, I915_READ(ILK_DSPCLK_GATE_D) | ILK_DPARBUNIT_CLOCK_GATE_ENABLE | ILK_DPFDUNIT_CLOCK_GATE_ENABLE); g4x_disable_trickle_feed(dev); /* The default value should be 0x200 according to docs, but the two * platforms I checked have a 0 for this. (Maybe BIOS overrides?) */ I915_WRITE(GEN6_GT_MODE, _MASKED_BIT_DISABLE(0xffff)); I915_WRITE(GEN6_GT_MODE, _MASKED_BIT_ENABLE(GEN6_GT_MODE_HI)); cpt_init_clock_gating(dev); gen6_check_mch_setup(dev); } static void gen7_setup_fixed_func_scheduler(struct drm_i915_private *dev_priv) { uint32_t reg = I915_READ(GEN7_FF_THREAD_MODE); reg &= ~GEN7_FF_SCHED_MASK; reg |= GEN7_FF_TS_SCHED_HW; reg |= GEN7_FF_VS_SCHED_HW; reg |= GEN7_FF_DS_SCHED_HW; if (IS_HASWELL(dev_priv->dev)) reg &= ~GEN7_FF_VS_REF_CNT_FFME; I915_WRITE(GEN7_FF_THREAD_MODE, reg); } static void lpt_init_clock_gating(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; /* * TODO: this bit should only be enabled when really needed, then * disabled when not needed anymore in order to save power. */ if (dev_priv->pch_id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE) I915_WRITE(SOUTH_DSPCLK_GATE_D, I915_READ(SOUTH_DSPCLK_GATE_D) | PCH_LP_PARTITION_LEVEL_DISABLE); /* WADPOClockGatingDisable:hsw */ I915_WRITE(_TRANSA_CHICKEN1, I915_READ(_TRANSA_CHICKEN1) | TRANS_CHICKEN1_DP0UNIT_GC_DISABLE); } static void lpt_suspend_hw(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; if (dev_priv->pch_id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE) { uint32_t val = I915_READ(SOUTH_DSPCLK_GATE_D); val &= ~PCH_LP_PARTITION_LEVEL_DISABLE; I915_WRITE(SOUTH_DSPCLK_GATE_D, val); } } static void gen8_init_clock_gating(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; enum pipe i; I915_WRITE(WM3_LP_ILK, 0); I915_WRITE(WM2_LP_ILK, 0); I915_WRITE(WM1_LP_ILK, 0); /* FIXME(BDW): Check all the w/a, some might only apply to * pre-production hw. */ WARN(!i915_preliminary_hw_support, "GEN8_CENTROID_PIXEL_OPT_DIS not be needed for production\n"); /* WaDisablePartialInstShootdown:bdw */ /* WaDisableThreadStallDopClockGating:bdw */ I915_WRITE(GEN8_ROW_CHICKEN, _MASKED_BIT_ENABLE(PARTIAL_INSTRUCTION_SHOOTDOWN_DISABLE | STALL_DOP_GATING_DISABLE)); I915_WRITE(HALF_SLICE_CHICKEN3, _MASKED_BIT_ENABLE(GEN8_CENTROID_PIXEL_OPT_DIS)); I915_WRITE(HALF_SLICE_CHICKEN3, _MASKED_BIT_ENABLE(GEN8_SAMPLER_POWER_BYPASS_DIS)); I915_WRITE(GAMTARBMODE, _MASKED_BIT_ENABLE(ARB_MODE_BWGTLB_DISABLE)); I915_WRITE(_3D_CHICKEN3, _3D_CHICKEN_SDE_LIMIT_FIFO_POLY_DEPTH(2)); I915_WRITE(COMMON_SLICE_CHICKEN2, _MASKED_BIT_ENABLE(GEN8_CSC2_SBE_VUE_CACHE_CONSERVATIVE)); I915_WRITE(GEN7_HALF_SLICE_CHICKEN1, _MASKED_BIT_ENABLE(GEN7_SINGLE_SUBSCAN_DISPATCH_ENABLE)); /* WaSwitchSolVfFArbitrationPriority:bdw */ I915_WRITE(GAM_ECOCHK, I915_READ(GAM_ECOCHK) | HSW_ECOCHK_ARB_PRIO_SOL); /* WaPsrDPAMaskVBlankInSRD:bdw */ I915_WRITE(CHICKEN_PAR1_1, I915_READ(CHICKEN_PAR1_1) | DPA_MASK_VBLANK_SRD); /* WaPsrDPRSUnmaskVBlankInSRD:bdw */ for_each_pipe(i) { I915_WRITE(CHICKEN_PIPESL_1(i), I915_READ(CHICKEN_PIPESL_1(i)) | DPRS_MASK_VBLANK_SRD); } /* Use Force Non-Coherent whenever executing a 3D context. This is a * workaround for for a possible hang in the unlikely event a TLB * invalidation occurs during a PSD flush. */ I915_WRITE(HDC_CHICKEN0, I915_READ(HDC_CHICKEN0) | _MASKED_BIT_ENABLE(HDC_FORCE_NON_COHERENT)); /* WaVSRefCountFullforceMissDisable:bdw */ /* WaDSRefCountFullforceMissDisable:bdw */ I915_WRITE(GEN7_FF_THREAD_MODE, I915_READ(GEN7_FF_THREAD_MODE) & ~(GEN8_FF_DS_REF_CNT_FFME | GEN7_FF_VS_REF_CNT_FFME)); I915_WRITE(GEN6_RC_SLEEP_PSMI_CONTROL, _MASKED_BIT_ENABLE(GEN8_RC_SEMA_IDLE_MSG_DISABLE)); /* WaDisableSDEUnitClockGating:bdw */ I915_WRITE(GEN8_UCGCTL6, I915_READ(GEN8_UCGCTL6) | GEN8_SDEUNIT_CLOCK_GATE_DISABLE); } static void haswell_init_clock_gating(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; ilk_init_lp_watermarks(dev); /* According to the spec, bit 13 (RCZUNIT) must be set on IVB. * This implements the WaDisableRCZUnitClockGating:hsw workaround. */ I915_WRITE(GEN6_UCGCTL2, GEN6_RCZUNIT_CLOCK_GATE_DISABLE); /* Apply the WaDisableRHWOOptimizationForRenderHang:hsw workaround. */ I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1, GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC); /* WaApplyL3ControlAndL3ChickenMode:hsw */ I915_WRITE(GEN7_L3CNTLREG1, GEN7_WA_FOR_GEN7_L3_CONTROL); I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER, GEN7_WA_L3_CHICKEN_MODE); /* L3 caching of data atomics doesn't work -- disable it. */ I915_WRITE(HSW_SCRATCH1, HSW_SCRATCH1_L3_DATA_ATOMICS_DISABLE); I915_WRITE(HSW_ROW_CHICKEN3, _MASKED_BIT_ENABLE(HSW_ROW_CHICKEN3_L3_GLOBAL_ATOMICS_DISABLE)); /* This is required by WaCatErrorRejectionIssue:hsw */ I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG, I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) | GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB); /* WaVSRefCountFullforceMissDisable:hsw */ gen7_setup_fixed_func_scheduler(dev_priv); /* WaDisable4x2SubspanOptimization:hsw */ I915_WRITE(CACHE_MODE_1, _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE)); /* WaSwitchSolVfFArbitrationPriority:hsw */ I915_WRITE(GAM_ECOCHK, I915_READ(GAM_ECOCHK) | HSW_ECOCHK_ARB_PRIO_SOL); /* WaRsPkgCStateDisplayPMReq:hsw */ I915_WRITE(CHICKEN_PAR1_1, I915_READ(CHICKEN_PAR1_1) | FORCE_ARB_IDLE_PLANES); lpt_init_clock_gating(dev); } static void ivybridge_init_clock_gating(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; uint32_t snpcr; ilk_init_lp_watermarks(dev); I915_WRITE(ILK_DSPCLK_GATE_D, ILK_VRHUNIT_CLOCK_GATE_DISABLE); /* WaDisableEarlyCull:ivb */ I915_WRITE(_3D_CHICKEN3, _MASKED_BIT_ENABLE(_3D_CHICKEN_SF_DISABLE_OBJEND_CULL)); /* WaDisableBackToBackFlipFix:ivb */ I915_WRITE(IVB_CHICKEN3, CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE | CHICKEN3_DGMG_DONE_FIX_DISABLE); /* WaDisablePSDDualDispatchEnable:ivb */ if (IS_IVB_GT1(dev)) I915_WRITE(GEN7_HALF_SLICE_CHICKEN1, _MASKED_BIT_ENABLE(GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE)); else I915_WRITE(GEN7_HALF_SLICE_CHICKEN1_GT2, _MASKED_BIT_ENABLE(GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE)); /* Apply the WaDisableRHWOOptimizationForRenderHang:ivb workaround. */ I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1, GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC); /* WaApplyL3ControlAndL3ChickenMode:ivb */ I915_WRITE(GEN7_L3CNTLREG1, GEN7_WA_FOR_GEN7_L3_CONTROL); I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER, GEN7_WA_L3_CHICKEN_MODE); if (IS_IVB_GT1(dev)) I915_WRITE(GEN7_ROW_CHICKEN2, _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE)); else I915_WRITE(GEN7_ROW_CHICKEN2_GT2, _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE)); /* WaForceL3Serialization:ivb */ I915_WRITE(GEN7_L3SQCREG4, I915_READ(GEN7_L3SQCREG4) & ~L3SQ_URB_READ_CAM_MATCH_DISABLE); /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock * gating disable must be set. Failure to set it results in * flickering pixels due to Z write ordering failures after * some amount of runtime in the Mesa "fire" demo, and Unigine * Sanctuary and Tropics, and apparently anything else with * alpha test or pixel discard. * * According to the spec, bit 11 (RCCUNIT) must also be set, * but we didn't debug actual testcases to find it out. * * According to the spec, bit 13 (RCZUNIT) must be set on IVB. * This implements the WaDisableRCZUnitClockGating:ivb workaround. */ I915_WRITE(GEN6_UCGCTL2, GEN6_RCZUNIT_CLOCK_GATE_DISABLE | GEN6_RCCUNIT_CLOCK_GATE_DISABLE); /* This is required by WaCatErrorRejectionIssue:ivb */ I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG, I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) | GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB); g4x_disable_trickle_feed(dev); /* WaVSRefCountFullforceMissDisable:ivb */ gen7_setup_fixed_func_scheduler(dev_priv); /* WaDisable4x2SubspanOptimization:ivb */ I915_WRITE(CACHE_MODE_1, _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE)); snpcr = I915_READ(GEN6_MBCUNIT_SNPCR); snpcr &= ~GEN6_MBC_SNPCR_MASK; snpcr |= GEN6_MBC_SNPCR_MED; I915_WRITE(GEN6_MBCUNIT_SNPCR, snpcr); if (!HAS_PCH_NOP(dev)) cpt_init_clock_gating(dev); gen6_check_mch_setup(dev); } static void valleyview_init_clock_gating(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; u32 val; mutex_lock(&dev_priv->rps.hw_lock); val = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS); mutex_unlock(&dev_priv->rps.hw_lock); switch ((val >> 6) & 3) { case 0: dev_priv->mem_freq = 800; break; case 1: dev_priv->mem_freq = 1066; break; case 2: dev_priv->mem_freq = 1333; break; case 3: dev_priv->mem_freq = 1333; break; } DRM_DEBUG_DRIVER("DDR speed: %d MHz", dev_priv->mem_freq); I915_WRITE(DSPCLK_GATE_D, VRHUNIT_CLOCK_GATE_DISABLE); /* WaDisableEarlyCull:vlv */ I915_WRITE(_3D_CHICKEN3, _MASKED_BIT_ENABLE(_3D_CHICKEN_SF_DISABLE_OBJEND_CULL)); /* WaDisableBackToBackFlipFix:vlv */ I915_WRITE(IVB_CHICKEN3, CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE | CHICKEN3_DGMG_DONE_FIX_DISABLE); /* WaDisablePSDDualDispatchEnable:vlv */ I915_WRITE(GEN7_HALF_SLICE_CHICKEN1, _MASKED_BIT_ENABLE(GEN7_MAX_PS_THREAD_DEP | GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE)); /* Apply the WaDisableRHWOOptimizationForRenderHang:vlv workaround. */ I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1, GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC); /* WaApplyL3ControlAndL3ChickenMode:vlv */ I915_WRITE(GEN7_L3CNTLREG1, I915_READ(GEN7_L3CNTLREG1) | GEN7_L3AGDIS); I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER, GEN7_WA_L3_CHICKEN_MODE); /* WaForceL3Serialization:vlv */ I915_WRITE(GEN7_L3SQCREG4, I915_READ(GEN7_L3SQCREG4) & ~L3SQ_URB_READ_CAM_MATCH_DISABLE); /* WaDisableDopClockGating:vlv */ I915_WRITE(GEN7_ROW_CHICKEN2, _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE)); /* This is required by WaCatErrorRejectionIssue:vlv */ I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG, I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) | GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB); /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock * gating disable must be set. Failure to set it results in * flickering pixels due to Z write ordering failures after * some amount of runtime in the Mesa "fire" demo, and Unigine * Sanctuary and Tropics, and apparently anything else with * alpha test or pixel discard. * * According to the spec, bit 11 (RCCUNIT) must also be set, * but we didn't debug actual testcases to find it out. * * According to the spec, bit 13 (RCZUNIT) must be set on IVB. * This implements the WaDisableRCZUnitClockGating:vlv workaround. * * Also apply WaDisableVDSUnitClockGating:vlv and * WaDisableRCPBUnitClockGating:vlv. */ I915_WRITE(GEN6_UCGCTL2, GEN7_VDSUNIT_CLOCK_GATE_DISABLE | GEN7_TDLUNIT_CLOCK_GATE_DISABLE | GEN6_RCZUNIT_CLOCK_GATE_DISABLE | GEN6_RCPBUNIT_CLOCK_GATE_DISABLE | GEN6_RCCUNIT_CLOCK_GATE_DISABLE); I915_WRITE(GEN7_UCGCTL4, GEN7_L3BANK2X_CLOCK_GATE_DISABLE); I915_WRITE(MI_ARB_VLV, MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE); I915_WRITE(CACHE_MODE_1, _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE)); /* * WaDisableVLVClockGating_VBIIssue:vlv * Disable clock gating on th GCFG unit to prevent a delay * in the reporting of vblank events. */ I915_WRITE(VLV_GUNIT_CLOCK_GATE, 0xffffffff); /* Conservative clock gating settings for now */ I915_WRITE(0x9400, 0xffffffff); I915_WRITE(0x9404, 0xffffffff); I915_WRITE(0x9408, 0xffffffff); I915_WRITE(0x940c, 0xffffffff); I915_WRITE(0x9410, 0xffffffff); I915_WRITE(0x9414, 0xffffffff); I915_WRITE(0x9418, 0xffffffff); } static void g4x_init_clock_gating(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; uint32_t dspclk_gate; I915_WRITE(RENCLK_GATE_D1, 0); I915_WRITE(RENCLK_GATE_D2, VF_UNIT_CLOCK_GATE_DISABLE | GS_UNIT_CLOCK_GATE_DISABLE | CL_UNIT_CLOCK_GATE_DISABLE); I915_WRITE(RAMCLK_GATE_D, 0); dspclk_gate = VRHUNIT_CLOCK_GATE_DISABLE | OVRUNIT_CLOCK_GATE_DISABLE | OVCUNIT_CLOCK_GATE_DISABLE; if (IS_GM45(dev)) dspclk_gate |= DSSUNIT_CLOCK_GATE_DISABLE; I915_WRITE(DSPCLK_GATE_D, dspclk_gate); /* WaDisableRenderCachePipelinedFlush */ I915_WRITE(CACHE_MODE_0, _MASKED_BIT_ENABLE(CM0_PIPELINED_RENDER_FLUSH_DISABLE)); g4x_disable_trickle_feed(dev); } static void crestline_init_clock_gating(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; I915_WRITE(RENCLK_GATE_D1, I965_RCC_CLOCK_GATE_DISABLE); I915_WRITE(RENCLK_GATE_D2, 0); I915_WRITE(DSPCLK_GATE_D, 0); I915_WRITE(RAMCLK_GATE_D, 0); I915_WRITE16(DEUC, 0); I915_WRITE(MI_ARB_STATE, _MASKED_BIT_ENABLE(MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE)); } static void broadwater_init_clock_gating(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; I915_WRITE(RENCLK_GATE_D1, I965_RCZ_CLOCK_GATE_DISABLE | I965_RCC_CLOCK_GATE_DISABLE | I965_RCPB_CLOCK_GATE_DISABLE | I965_ISC_CLOCK_GATE_DISABLE | I965_FBC_CLOCK_GATE_DISABLE); I915_WRITE(RENCLK_GATE_D2, 0); I915_WRITE(MI_ARB_STATE, _MASKED_BIT_ENABLE(MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE)); } static void gen3_init_clock_gating(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; u32 dstate = I915_READ(D_STATE); dstate |= DSTATE_PLL_D3_OFF | DSTATE_GFX_CLOCK_GATING | DSTATE_DOT_CLOCK_GATING; I915_WRITE(D_STATE, dstate); if (IS_PINEVIEW(dev)) I915_WRITE(ECOSKPD, _MASKED_BIT_ENABLE(ECO_GATING_CX_ONLY)); /* IIR "flip pending" means done if this bit is set */ I915_WRITE(ECOSKPD, _MASKED_BIT_DISABLE(ECO_FLIP_DONE)); } static void i85x_init_clock_gating(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; I915_WRITE(RENCLK_GATE_D1, SV_CLOCK_GATE_DISABLE); } static void i830_init_clock_gating(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; I915_WRITE(DSPCLK_GATE_D, OVRUNIT_CLOCK_GATE_DISABLE); } void intel_init_clock_gating(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; dev_priv->display.init_clock_gating(dev); } void intel_suspend_hw(struct drm_device *dev) { if (HAS_PCH_LPT(dev)) lpt_suspend_hw(dev); } #define for_each_power_well(i, power_well, domain_mask, power_domains) \ for (i = 0; \ i < (power_domains)->power_well_count && \ ((power_well) = &(power_domains)->power_wells[i]); \ i++) \ if ((power_well)->domains & (domain_mask)) #define for_each_power_well_rev(i, power_well, domain_mask, power_domains) \ for (i = (power_domains)->power_well_count - 1; \ i >= 0 && ((power_well) = &(power_domains)->power_wells[i]);\ i--) \ if ((power_well)->domains & (domain_mask)) /** * We should only use the power well if we explicitly asked the hardware to * enable it, so check if it's enabled and also check if we've requested it to * be enabled. */ static bool hsw_power_well_enabled(struct drm_device *dev, struct i915_power_well *power_well) { struct drm_i915_private *dev_priv = dev->dev_private; return I915_READ(HSW_PWR_WELL_DRIVER) == (HSW_PWR_WELL_ENABLE_REQUEST | HSW_PWR_WELL_STATE_ENABLED); } bool intel_display_power_enabled_sw(struct drm_device *dev, enum intel_display_power_domain domain) { struct drm_i915_private *dev_priv = dev->dev_private; struct i915_power_domains *power_domains; struct i915_power_well *power_well; bool is_enabled; int i; if (dev_priv->pm.suspended) return false; power_domains = &dev_priv->power_domains; is_enabled = true; for_each_power_well_rev(i, power_well, BIT(domain), power_domains) { if (power_well->always_on) continue; if (!power_well->count) { is_enabled = false; break; } } return is_enabled; } bool intel_display_power_enabled(struct drm_device *dev, enum intel_display_power_domain domain) { struct drm_i915_private *dev_priv = dev->dev_private; struct i915_power_domains *power_domains; struct i915_power_well *power_well; bool is_enabled; int i; power_domains = &dev_priv->power_domains; is_enabled = true; mutex_lock(&power_domains->lock); for_each_power_well_rev(i, power_well, BIT(domain), power_domains) { if (power_well->always_on) continue; if (!power_well->is_enabled(dev, power_well)) { is_enabled = false; break; } } mutex_unlock(&power_domains->lock); return is_enabled; } static void hsw_power_well_post_enable(struct drm_i915_private *dev_priv) { struct drm_device *dev = dev_priv->dev; unsigned long irqflags; /* * After we re-enable the power well, if we touch VGA register 0x3d5 * we'll get unclaimed register interrupts. This stops after we write * anything to the VGA MSR register. The vgacon module uses this * register all the time, so if we unbind our driver and, as a * consequence, bind vgacon, we'll get stuck in an infinite loop at * console_unlock(). So make here we touch the VGA MSR register, making * sure vgacon can keep working normally without triggering interrupts * and error messages. */ vga_get_uninterruptible(dev->pdev, VGA_RSRC_LEGACY_IO); #ifdef __linux__ outb(inb(VGA_MSR_READ), VGA_MSR_WRITE); #else outb(VGA_MSR_WRITE, inb(VGA_MSR_READ)); #endif vga_put(dev->pdev, VGA_RSRC_LEGACY_IO); if (IS_BROADWELL(dev)) { spin_lock_irqsave(&dev_priv->irq_lock, irqflags); I915_WRITE(GEN8_DE_PIPE_IMR(PIPE_B), dev_priv->de_irq_mask[PIPE_B]); I915_WRITE(GEN8_DE_PIPE_IER(PIPE_B), ~dev_priv->de_irq_mask[PIPE_B] | GEN8_PIPE_VBLANK); I915_WRITE(GEN8_DE_PIPE_IMR(PIPE_C), dev_priv->de_irq_mask[PIPE_C]); I915_WRITE(GEN8_DE_PIPE_IER(PIPE_C), ~dev_priv->de_irq_mask[PIPE_C] | GEN8_PIPE_VBLANK); POSTING_READ(GEN8_DE_PIPE_IER(PIPE_C)); spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); } } static void hsw_power_well_post_disable(struct drm_i915_private *dev_priv) { struct drm_device *dev = dev_priv->dev; enum pipe p; unsigned long irqflags; /* * After this, the registers on the pipes that are part of the power * well will become zero, so we have to adjust our counters according to * that. * * FIXME: Should we do this in general in drm_vblank_post_modeset? */ spin_lock_irqsave(&dev->vbl_lock, irqflags); for_each_pipe(p) if (p != PIPE_A) dev->vblank[p].last = 0; spin_unlock_irqrestore(&dev->vbl_lock, irqflags); } static void hsw_set_power_well(struct drm_device *dev, struct i915_power_well *power_well, bool enable) { struct drm_i915_private *dev_priv = dev->dev_private; bool is_enabled, enable_requested; uint32_t tmp; WARN_ON(dev_priv->pc8.enabled); tmp = I915_READ(HSW_PWR_WELL_DRIVER); is_enabled = tmp & HSW_PWR_WELL_STATE_ENABLED; enable_requested = tmp & HSW_PWR_WELL_ENABLE_REQUEST; if (enable) { if (!enable_requested) I915_WRITE(HSW_PWR_WELL_DRIVER, HSW_PWR_WELL_ENABLE_REQUEST); if (!is_enabled) { DRM_DEBUG_KMS("Enabling power well\n"); if (wait_for((I915_READ(HSW_PWR_WELL_DRIVER) & HSW_PWR_WELL_STATE_ENABLED), 20)) DRM_ERROR("Timeout enabling power well\n"); } hsw_power_well_post_enable(dev_priv); } else { if (enable_requested) { I915_WRITE(HSW_PWR_WELL_DRIVER, 0); POSTING_READ(HSW_PWR_WELL_DRIVER); DRM_DEBUG_KMS("Requesting to disable the power well\n"); hsw_power_well_post_disable(dev_priv); } } } static void __intel_power_well_get(struct drm_device *dev, struct i915_power_well *power_well) { struct drm_i915_private *dev_priv = dev->dev_private; if (!power_well->count++ && power_well->set) { hsw_disable_package_c8(dev_priv); power_well->set(dev, power_well, true); } } static void __intel_power_well_put(struct drm_device *dev, struct i915_power_well *power_well) { struct drm_i915_private *dev_priv = dev->dev_private; WARN_ON(!power_well->count); if (!--power_well->count && power_well->set && i915_disable_power_well) { power_well->set(dev, power_well, false); hsw_enable_package_c8(dev_priv); } } void intel_display_power_get(struct drm_device *dev, enum intel_display_power_domain domain) { struct drm_i915_private *dev_priv = dev->dev_private; struct i915_power_domains *power_domains; struct i915_power_well *power_well; int i; power_domains = &dev_priv->power_domains; mutex_lock(&power_domains->lock); for_each_power_well(i, power_well, BIT(domain), power_domains) __intel_power_well_get(dev, power_well); power_domains->domain_use_count[domain]++; mutex_unlock(&power_domains->lock); } void intel_display_power_put(struct drm_device *dev, enum intel_display_power_domain domain) { struct drm_i915_private *dev_priv = dev->dev_private; struct i915_power_domains *power_domains; struct i915_power_well *power_well; int i; power_domains = &dev_priv->power_domains; mutex_lock(&power_domains->lock); WARN_ON(!power_domains->domain_use_count[domain]); power_domains->domain_use_count[domain]--; for_each_power_well_rev(i, power_well, BIT(domain), power_domains) __intel_power_well_put(dev, power_well); mutex_unlock(&power_domains->lock); } static struct i915_power_domains *hsw_pwr; /* Display audio driver power well request */ void i915_request_power_well(void) { struct drm_i915_private *dev_priv; if (WARN_ON(!hsw_pwr)) return; dev_priv = container_of(hsw_pwr, struct drm_i915_private, power_domains); intel_display_power_get(dev_priv->dev, POWER_DOMAIN_AUDIO); } /* Display audio driver power well release */ void i915_release_power_well(void) { struct drm_i915_private *dev_priv; if (WARN_ON(!hsw_pwr)) return; dev_priv = container_of(hsw_pwr, struct drm_i915_private, power_domains); intel_display_power_put(dev_priv->dev, POWER_DOMAIN_AUDIO); } static struct i915_power_well i9xx_always_on_power_well[] = { { .name = "always-on", .always_on = 1, .domains = POWER_DOMAIN_MASK, }, }; static struct i915_power_well hsw_power_wells[] = { { .name = "always-on", .always_on = 1, .domains = HSW_ALWAYS_ON_POWER_DOMAINS, }, { .name = "display", .domains = POWER_DOMAIN_MASK & ~HSW_ALWAYS_ON_POWER_DOMAINS, .is_enabled = hsw_power_well_enabled, .set = hsw_set_power_well, }, }; static struct i915_power_well bdw_power_wells[] = { { .name = "always-on", .always_on = 1, .domains = BDW_ALWAYS_ON_POWER_DOMAINS, }, { .name = "display", .domains = POWER_DOMAIN_MASK & ~BDW_ALWAYS_ON_POWER_DOMAINS, .is_enabled = hsw_power_well_enabled, .set = hsw_set_power_well, }, }; #define set_power_wells(power_domains, __power_wells) ({ \ (power_domains)->power_wells = (__power_wells); \ (power_domains)->power_well_count = ARRAY_SIZE(__power_wells); \ }) int intel_power_domains_init(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; struct i915_power_domains *power_domains = &dev_priv->power_domains; rw_init(&power_domains->lock, "powdom"); /* * The enabling order will be from lower to higher indexed wells, * the disabling order is reversed. */ if (IS_HASWELL(dev)) { set_power_wells(power_domains, hsw_power_wells); hsw_pwr = power_domains; } else if (IS_BROADWELL(dev)) { set_power_wells(power_domains, bdw_power_wells); hsw_pwr = power_domains; } else { set_power_wells(power_domains, i9xx_always_on_power_well); } return 0; } void intel_power_domains_remove(struct drm_device *dev) { hsw_pwr = NULL; } static void intel_power_domains_resume(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; struct i915_power_domains *power_domains = &dev_priv->power_domains; struct i915_power_well *power_well; int i; mutex_lock(&power_domains->lock); for_each_power_well(i, power_well, POWER_DOMAIN_MASK, power_domains) { if (power_well->set) power_well->set(dev, power_well, power_well->count > 0); } mutex_unlock(&power_domains->lock); } /* * Starting with Haswell, we have a "Power Down Well" that can be turned off * when not needed anymore. We have 4 registers that can request the power well * to be enabled, and it will only be disabled if none of the registers is * requesting it to be enabled. */ void intel_power_domains_init_hw(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; /* For now, we need the power well to be always enabled. */ intel_display_set_init_power(dev, true); intel_power_domains_resume(dev); if (!(IS_HASWELL(dev) || IS_BROADWELL(dev))) return; /* We're taking over the BIOS, so clear any requests made by it since * the driver is in charge now. */ if (I915_READ(HSW_PWR_WELL_BIOS) & HSW_PWR_WELL_ENABLE_REQUEST) I915_WRITE(HSW_PWR_WELL_BIOS, 0); } /* Disables PC8 so we can use the GMBUS and DP AUX interrupts. */ void intel_aux_display_runtime_get(struct drm_i915_private *dev_priv) { hsw_disable_package_c8(dev_priv); } void intel_aux_display_runtime_put(struct drm_i915_private *dev_priv) { hsw_enable_package_c8(dev_priv); } #ifdef __linux__ void intel_runtime_pm_get(struct drm_i915_private *dev_priv) { struct drm_device *dev = dev_priv->dev; struct device *device = &dev->pdev->dev; if (!HAS_RUNTIME_PM(dev)) return; pm_runtime_get_sync(device); WARN(dev_priv->pm.suspended, "Device still suspended.\n"); } void intel_runtime_pm_put(struct drm_i915_private *dev_priv) { struct drm_device *dev = dev_priv->dev; struct device *device = &dev->pdev->dev; if (!HAS_RUNTIME_PM(dev)) return; pm_runtime_mark_last_busy(device); pm_runtime_put_autosuspend(device); } void intel_init_runtime_pm(struct drm_i915_private *dev_priv) { struct drm_device *dev = dev_priv->dev; struct device *device = &dev->pdev->dev; dev_priv->pm.suspended = false; if (!HAS_RUNTIME_PM(dev)) return; pm_runtime_set_active(device); pm_runtime_set_autosuspend_delay(device, 10000); /* 10s */ pm_runtime_mark_last_busy(device); pm_runtime_use_autosuspend(device); } void intel_fini_runtime_pm(struct drm_i915_private *dev_priv) { struct drm_device *dev = dev_priv->dev; struct device *device = &dev->pdev->dev; if (!HAS_RUNTIME_PM(dev)) return; /* Make sure we're not suspended first. */ pm_runtime_get_sync(device); pm_runtime_disable(device); } #else void intel_runtime_pm_get(struct drm_i915_private *dev_priv) { } void intel_runtime_pm_put(struct drm_i915_private *dev_priv) { } void intel_init_runtime_pm(struct drm_i915_private *dev_priv) { } void intel_fini_runtime_pm(struct drm_i915_private *dev_priv) { } #endif /* Set up chip specific power management-related functions */ void intel_init_pm(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; if (HAS_FBC(dev)) { if (INTEL_INFO(dev)->gen >= 7) { dev_priv->display.fbc_enabled = ironlake_fbc_enabled; dev_priv->display.enable_fbc = gen7_enable_fbc; dev_priv->display.disable_fbc = ironlake_disable_fbc; } else if (INTEL_INFO(dev)->gen >= 5) { dev_priv->display.fbc_enabled = ironlake_fbc_enabled; dev_priv->display.enable_fbc = ironlake_enable_fbc; dev_priv->display.disable_fbc = ironlake_disable_fbc; } else if (IS_GM45(dev)) { dev_priv->display.fbc_enabled = g4x_fbc_enabled; dev_priv->display.enable_fbc = g4x_enable_fbc; dev_priv->display.disable_fbc = g4x_disable_fbc; } else { dev_priv->display.fbc_enabled = i8xx_fbc_enabled; dev_priv->display.enable_fbc = i8xx_enable_fbc; dev_priv->display.disable_fbc = i8xx_disable_fbc; /* This value was pulled out of someone's hat */ I915_WRITE(FBC_CONTROL, 500 << FBC_CTL_INTERVAL_SHIFT); } } /* For cxsr */ if (IS_PINEVIEW(dev)) i915_pineview_get_mem_freq(dev); else if (IS_GEN5(dev)) i915_ironlake_get_mem_freq(dev); /* For FIFO watermark updates */ if (HAS_PCH_SPLIT(dev)) { intel_setup_wm_latency(dev); if ((IS_GEN5(dev) && dev_priv->wm.pri_latency[1] && dev_priv->wm.spr_latency[1] && dev_priv->wm.cur_latency[1]) || (!IS_GEN5(dev) && dev_priv->wm.pri_latency[0] && dev_priv->wm.spr_latency[0] && dev_priv->wm.cur_latency[0])) { dev_priv->display.update_wm = ilk_update_wm; dev_priv->display.update_sprite_wm = ilk_update_sprite_wm; } else { DRM_DEBUG_KMS("Failed to read display plane latency. " "Disable CxSR\n"); } if (IS_GEN5(dev)) dev_priv->display.init_clock_gating = ironlake_init_clock_gating; else if (IS_GEN6(dev)) dev_priv->display.init_clock_gating = gen6_init_clock_gating; else if (IS_IVYBRIDGE(dev)) dev_priv->display.init_clock_gating = ivybridge_init_clock_gating; else if (IS_HASWELL(dev)) dev_priv->display.init_clock_gating = haswell_init_clock_gating; else if (INTEL_INFO(dev)->gen == 8) dev_priv->display.init_clock_gating = gen8_init_clock_gating; } else if (IS_VALLEYVIEW(dev)) { dev_priv->display.update_wm = valleyview_update_wm; dev_priv->display.init_clock_gating = valleyview_init_clock_gating; } else if (IS_PINEVIEW(dev)) { if (!intel_get_cxsr_latency(IS_PINEVIEW_G(dev), dev_priv->is_ddr3, dev_priv->fsb_freq, dev_priv->mem_freq)) { DRM_INFO("failed to find known CxSR latency " "(found ddr%s fsb freq %d, mem freq %d), " "disabling CxSR\n", (dev_priv->is_ddr3 == 1) ? "3" : "2", dev_priv->fsb_freq, dev_priv->mem_freq); /* Disable CxSR and never update its watermark again */ pineview_disable_cxsr(dev); dev_priv->display.update_wm = NULL; } else dev_priv->display.update_wm = pineview_update_wm; dev_priv->display.init_clock_gating = gen3_init_clock_gating; } else if (IS_G4X(dev)) { dev_priv->display.update_wm = g4x_update_wm; dev_priv->display.init_clock_gating = g4x_init_clock_gating; } else if (IS_GEN4(dev)) { dev_priv->display.update_wm = i965_update_wm; if (IS_CRESTLINE(dev)) dev_priv->display.init_clock_gating = crestline_init_clock_gating; else if (IS_BROADWATER(dev)) dev_priv->display.init_clock_gating = broadwater_init_clock_gating; } else if (IS_GEN3(dev)) { dev_priv->display.update_wm = i9xx_update_wm; dev_priv->display.get_fifo_size = i9xx_get_fifo_size; dev_priv->display.init_clock_gating = gen3_init_clock_gating; } else if (IS_GEN2(dev)) { if (INTEL_INFO(dev)->num_pipes == 1) { dev_priv->display.update_wm = i845_update_wm; dev_priv->display.get_fifo_size = i845_get_fifo_size; } else { dev_priv->display.update_wm = i9xx_update_wm; dev_priv->display.get_fifo_size = i830_get_fifo_size; } if (IS_I85X(dev) || IS_I865G(dev)) dev_priv->display.init_clock_gating = i85x_init_clock_gating; else dev_priv->display.init_clock_gating = i830_init_clock_gating; } else { DRM_ERROR("unexpected fall-through in intel_init_pm\n"); } } int sandybridge_pcode_read(struct drm_i915_private *dev_priv, u8 mbox, u32 *val) { WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock)); if (I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) { DRM_DEBUG_DRIVER("warning: pcode (read) mailbox access failed\n"); return -EAGAIN; } I915_WRITE(GEN6_PCODE_DATA, *val); I915_WRITE(GEN6_PCODE_MAILBOX, GEN6_PCODE_READY | mbox); if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0, 500)) { DRM_ERROR("timeout waiting for pcode read (%d) to finish\n", mbox); return -ETIMEDOUT; } *val = I915_READ(GEN6_PCODE_DATA); I915_WRITE(GEN6_PCODE_DATA, 0); return 0; } int sandybridge_pcode_write(struct drm_i915_private *dev_priv, u8 mbox, u32 val) { WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock)); if (I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) { DRM_DEBUG_DRIVER("warning: pcode (write) mailbox access failed\n"); return -EAGAIN; } I915_WRITE(GEN6_PCODE_DATA, val); I915_WRITE(GEN6_PCODE_MAILBOX, GEN6_PCODE_READY | mbox); if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0, 500)) { DRM_ERROR("timeout waiting for pcode write (%d) to finish\n", mbox); return -ETIMEDOUT; } I915_WRITE(GEN6_PCODE_DATA, 0); return 0; } int vlv_gpu_freq(struct drm_i915_private *dev_priv, int val) { int div; /* 4 x czclk */ switch (dev_priv->mem_freq) { case 800: div = 10; break; case 1066: div = 12; break; case 1333: div = 16; break; default: return -1; } return DIV_ROUND_CLOSEST(dev_priv->mem_freq * (val + 6 - 0xbd), 4 * div); } int vlv_freq_opcode(struct drm_i915_private *dev_priv, int val) { int mul; /* 4 x czclk */ switch (dev_priv->mem_freq) { case 800: mul = 10; break; case 1066: mul = 12; break; case 1333: mul = 16; break; default: return -1; } return DIV_ROUND_CLOSEST(4 * mul * val, dev_priv->mem_freq) + 0xbd - 6; } void intel_pm_setup(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; rw_init(&dev_priv->rps.hw_lock, "rpshw"); rw_init(&dev_priv->pc8.lock, "pc8"); dev_priv->pc8.requirements_met = false; dev_priv->pc8.gpu_idle = false; dev_priv->pc8.irqs_disabled = false; dev_priv->pc8.enabled = false; dev_priv->pc8.disable_count = 2; /* requirements_met + gpu_idle */ INIT_DELAYED_WORK(&dev_priv->pc8.enable_work, hsw_enable_pc8_work); INIT_DELAYED_WORK(&dev_priv->rps.delayed_resume_work, intel_gen6_powersave_work); }