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/*
* Copyright © 2006 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:
* Eric Anholt <eric@anholt.net>
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "xf86.h"
#include "i830.h"
#include "i830_bios.h"
/**
* Sets the power state for the panel.
*/
static void
i830SetLVDSPanelPower(ScrnInfoPtr pScrn, Bool on)
{
I830Ptr pI830 = I830PTR(pScrn);
CARD32 pp_status, pp_control;
CARD32 blc_pwm_ctl;
int backlight_duty_cycle;
blc_pwm_ctl = INREG (BLC_PWM_CTL);
backlight_duty_cycle = blc_pwm_ctl & BACKLIGHT_DUTY_CYCLE_MASK;
if (backlight_duty_cycle)
pI830->backlight_duty_cycle = backlight_duty_cycle;
if (on) {
OUTREG(PP_STATUS, INREG(PP_STATUS) | PP_ON);
OUTREG(PP_CONTROL, INREG(PP_CONTROL) | POWER_TARGET_ON);
do {
pp_status = INREG(PP_STATUS);
pp_control = INREG(PP_CONTROL);
} while (!(pp_status & PP_ON) && !(pp_control & POWER_TARGET_ON));
OUTREG(BLC_PWM_CTL,
(blc_pwm_ctl & ~BACKLIGHT_DUTY_CYCLE_MASK) |
pI830->backlight_duty_cycle);
} else {
OUTREG(BLC_PWM_CTL,
(blc_pwm_ctl & ~BACKLIGHT_DUTY_CYCLE_MASK));
OUTREG(PP_STATUS, INREG(PP_STATUS) & ~PP_ON);
OUTREG(PP_CONTROL, INREG(PP_CONTROL) & ~POWER_TARGET_ON);
do {
pp_status = INREG(PP_STATUS);
pp_control = INREG(PP_CONTROL);
} while ((pp_status & PP_ON) || (pp_control & POWER_TARGET_ON));
}
}
static void
i830_lvds_dpms(ScrnInfoPtr pScrn, I830OutputPtr output, int mode)
{
if (mode == DPMSModeOn)
i830SetLVDSPanelPower(pScrn, TRUE);
else
i830SetLVDSPanelPower(pScrn, FALSE);
}
static void
i830_lvds_save(ScrnInfoPtr pScrn, I830OutputPtr output)
{
I830Ptr pI830 = I830PTR(pScrn);
pI830->savePFIT_CONTROL = INREG(PFIT_CONTROL);
pI830->savePP_ON = INREG(LVDSPP_ON);
pI830->savePP_OFF = INREG(LVDSPP_OFF);
pI830->saveLVDS = INREG(LVDS);
pI830->savePP_CONTROL = INREG(PP_CONTROL);
pI830->savePP_CYCLE = INREG(PP_CYCLE);
pI830->saveBLC_PWM_CTL = INREG(BLC_PWM_CTL);
pI830->backlight_duty_cycle = (pI830->saveBLC_PWM_CTL &
BACKLIGHT_DUTY_CYCLE_MASK);
/*
* If the light is off at server startup, just make it full brightness
*/
if (pI830->backlight_duty_cycle == 0) {
pI830->backlight_duty_cycle =
(pI830->saveBLC_PWM_CTL & BACKLIGHT_MODULATION_FREQ_MASK) >>
BACKLIGHT_MODULATION_FREQ_SHIFT;
}
}
static void
i830_lvds_restore(ScrnInfoPtr pScrn, I830OutputPtr output)
{
I830Ptr pI830 = I830PTR(pScrn);
OUTREG(BLC_PWM_CTL, pI830->saveBLC_PWM_CTL);
OUTREG(LVDSPP_ON, pI830->savePP_ON);
OUTREG(LVDSPP_OFF, pI830->savePP_OFF);
OUTREG(PP_CYCLE, pI830->savePP_CYCLE);
OUTREG(PFIT_CONTROL, pI830->savePFIT_CONTROL);
OUTREG(LVDS, pI830->saveLVDS);
OUTREG(PP_CONTROL, pI830->savePP_CONTROL);
if (pI830->savePP_CONTROL & POWER_TARGET_ON)
i830SetLVDSPanelPower(pScrn, TRUE);
else
i830SetLVDSPanelPower(pScrn, FALSE);
}
static int
i830_lvds_mode_valid(ScrnInfoPtr pScrn, I830OutputPtr output,
DisplayModePtr pMode)
{
return MODE_OK;
}
static void
i830_lvds_pre_set_mode(ScrnInfoPtr pScrn, I830OutputPtr output,
DisplayModePtr pMode)
{
/* Always make sure the LVDS is off before we play with DPLLs and pipe
* configuration. We can skip this in some cases (for example, going
* between hi-res modes with automatic panel scaling are fine), but be
* conservative for now.
*/
i830SetLVDSPanelPower(pScrn, FALSE);
}
static void
i830_lvds_post_set_mode(ScrnInfoPtr pScrn, I830OutputPtr output,
DisplayModePtr pMode)
{
I830Ptr pI830 = I830PTR(pScrn);
CARD32 pfit_control;
/* Enable automatic panel scaling so that non-native modes fill the
* screen. Should be enabled before the pipe is enabled, according to
* register description.
*/
pfit_control = (PFIT_ENABLE |
VERT_AUTO_SCALE | HORIZ_AUTO_SCALE |
VERT_INTERP_BILINEAR | HORIZ_INTERP_BILINEAR);
if (pI830->panel_wants_dither)
pfit_control |= PANEL_8TO6_DITHER_ENABLE;
OUTREG(PFIT_CONTROL, pfit_control);
/* Disable the PLL before messing with LVDS enable */
OUTREG(FPB0, INREG(FPB0) & ~DPLL_VCO_ENABLE);
/* LVDS must be powered on before PLL is enabled and before power
* sequencing the panel.
*/
OUTREG(LVDS, INREG(LVDS) | LVDS_PORT_EN | LVDS_PIPEB_SELECT);
/* Re-enable the PLL */
OUTREG(FPB0, INREG(FPB0) | DPLL_VCO_ENABLE);
i830SetLVDSPanelPower(pScrn, TRUE);
}
/**
* Detect the LVDS connection.
*
* This always returns OUTPUT_STATUS_CONNECTED. This output should only have
* been set up if the LVDS was actually connected anyway.
*/
static enum detect_status
i830_lvds_detect(ScrnInfoPtr pScrn, I830OutputPtr output)
{
return OUTPUT_STATUS_CONNECTED;
}
/**
* Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
*/
static DisplayModePtr
i830_lvds_get_modes(ScrnInfoPtr pScrn, I830OutputPtr output)
{
I830Ptr pI830 = I830PTR(pScrn);
DisplayModePtr modes, new;
char stmp[32];
modes = i830_ddc_get_modes(pScrn, output);
if (modes != NULL)
return modes;
new = xnfcalloc(1, sizeof (DisplayModeRec));
sprintf(stmp, "%dx%d", pI830->PanelXRes, pI830->PanelYRes);
new->name = xnfalloc(strlen(stmp) + 1);
strcpy(new->name, stmp);
new->HDisplay = pI830->PanelXRes;
new->VDisplay = pI830->PanelYRes;
new->HSyncStart = pI830->panel_fixed_hactive + pI830->panel_fixed_hsyncoff;
new->HSyncEnd = new->HSyncStart + pI830->panel_fixed_hsyncwidth;
new->HTotal = new->HSyncEnd + 1;
new->VSyncStart = pI830->panel_fixed_vactive + pI830->panel_fixed_vsyncoff;
new->VSyncEnd = new->VSyncStart + pI830->panel_fixed_vsyncwidth;
new->VTotal = new->VSyncEnd + 1;
new->Clock = pI830->panel_fixed_clock;
new->type = M_T_PREFERRED;
return new;
}
void
i830_lvds_init(ScrnInfoPtr pScrn)
{
I830Ptr pI830 = I830PTR(pScrn);
/* Get the LVDS fixed mode out of the BIOS. We should support LVDS with
* the BIOS being unavailable or broken, but lack the configuration options
* for now.
*/
if (!i830GetLVDSInfoFromBIOS(pScrn))
return;
/* Blacklist machines with BIOSes that list an LVDS panel without actually
* having one.
*/
if (pI830->PciInfo->chipType == PCI_CHIP_I945_GM) {
if (pI830->PciInfo->subsysVendor == 0xa0a0) /* aopen mini pc */
return;
if ((pI830->PciInfo->subsysVendor == 0x8086) &&
(pI830->PciInfo->subsysCard == 0x7270)) {
/* It's a Mac Mini or Macbook Pro.
*
* Apple hardware is out to get us. The macbook pro has a real
* LVDS panel, but the mac mini does not, and they have the same
* device IDs. We'll distinguish by panel size, on the assumption
* that Apple isn't about to make any machines with an 800x600
* display.
*/
if (pI830->PanelXRes == 800 && pI830->PanelYRes == 600) {
xf86DrvMsg(pScrn->scrnIndex, X_INFO,
"Suspected Mac Mini, ignoring the LVDS\n");
return;
}
}
}
pI830->output[pI830->num_outputs].type = I830_OUTPUT_LVDS;
pI830->output[pI830->num_outputs].dpms = i830_lvds_dpms;
pI830->output[pI830->num_outputs].save = i830_lvds_save;
pI830->output[pI830->num_outputs].restore = i830_lvds_restore;
pI830->output[pI830->num_outputs].mode_valid = i830_lvds_mode_valid;
pI830->output[pI830->num_outputs].pre_set_mode = i830_lvds_pre_set_mode;
pI830->output[pI830->num_outputs].post_set_mode = i830_lvds_post_set_mode;
pI830->output[pI830->num_outputs].detect = i830_lvds_detect;
pI830->output[pI830->num_outputs].get_modes = i830_lvds_get_modes;
/* Set up the LVDS DDC channel. Most panels won't support it, but it can
* be useful if available.
*/
I830I2CInit(pScrn, &pI830->output[pI830->num_outputs].pDDCBus,
GPIOC, "LVDSDDC_C");
pI830->num_outputs++;
}
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