add the rest of intel_fb.c

5 files changed, 1857 insertions, 9 deletions

diff --git a/sys/dev/pci/drm/drm_fb_helper.c b/sys/dev/pci/drm/drm_fb_helper.c
new file mode 100644
index 00000000000..f4fac2b3f67
--- /dev/null
+++ b/sys/dev/pci/drm/drm_fb_helper.c
@@ -0,0 +1,1570 @@
+/*
+ * Copyright (c) 2006-2009 Red Hat Inc.
+ * Copyright (c) 2006-2008 Intel Corporation
+ * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
+ *
+ * DRM framebuffer helper functions
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting documentation, and
+ * that the name of the copyright holders not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  The copyright holders make no representations
+ * about the suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ *
+ * Authors:
+ *      Dave Airlie <airlied@linux.ie>
+ *      Jesse Barnes <jesse.barnes@intel.com>
+ */
+
+#include "drmP.h"
+#include "drm_crtc.h"
+#include "drm_fb_helper.h"
+#include "drm_crtc_helper.h"
+
+long simple_strtol(const char *, char **, int);
+
+static DRM_LIST_HEAD(kernel_fb_helper_list);
+
+/* simple single crtc case helper function */
+int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper)
+{
+	struct drm_device *dev = fb_helper->dev;
+	struct drm_connector *connector;
+
+	TAILQ_FOREACH(connector, &dev->mode_config.connector_list, head) {
+		struct drm_fb_helper_connector *fb_helper_connector;
+
+		fb_helper_connector = malloc(
+		    sizeof(struct drm_fb_helper_connector), M_DRM,
+		    M_WAITOK | M_ZERO);
+
+		fb_helper_connector->connector = connector;
+		fb_helper->connector_info[fb_helper->connector_count++] = fb_helper_connector;
+	}
+	return 0;
+}
+
+const char *fb_mode_option;
+
+/**
+ * drm_fb_helper_connector_parse_command_line - parse command line for connector
+ * @connector - connector to parse line for
+ * @mode_option - per connector mode option
+ *
+ * This parses the connector specific then generic command lines for
+ * modes and options to configure the connector.
+ *
+ * This uses the same parameters as the fb modedb.c, except for extra
+ *	<xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd]
+ *
+ * enable/enable Digital/disable bit at the end
+ */
+static bool drm_fb_helper_connector_parse_command_line(struct drm_fb_helper_connector *fb_helper_conn,
+						       const char *mode_option)
+{
+	const char *name;
+	unsigned int namelen;
+	int res_specified = 0, bpp_specified = 0, refresh_specified = 0;
+	unsigned int xres = 0, yres = 0, bpp = 32, refresh = 0;
+	int yres_specified = 0, cvt = 0, rb = 0, interlace = 0, margins = 0;
+	int i;
+	enum drm_connector_force force = DRM_FORCE_UNSPECIFIED;
+	struct drm_fb_helper_cmdline_mode *cmdline_mode;
+	struct drm_connector *connector;
+
+	if (!fb_helper_conn)
+		return false;
+	connector = fb_helper_conn->connector;
+
+	cmdline_mode = &fb_helper_conn->cmdline_mode;
+	if (!mode_option)
+		mode_option = fb_mode_option;
+
+	if (!mode_option) {
+		cmdline_mode->specified = false;
+		return false;
+	}
+
+	name = mode_option;
+	namelen = strlen(name);
+	for (i = namelen-1; i >= 0; i--) {
+		switch (name[i]) {
+		case '@':
+			namelen = i;
+			if (!refresh_specified && !bpp_specified &&
+			    !yres_specified) {
+				refresh = simple_strtol(&name[i+1], NULL, 10);
+				refresh_specified = 1;
+				if (cvt || rb)
+					cvt = 0;
+			} else
+				goto done;
+			break;
+		case '-':
+			namelen = i;
+			if (!bpp_specified && !yres_specified) {
+				bpp = simple_strtol(&name[i+1], NULL, 10);
+				bpp_specified = 1;
+				if (cvt || rb)
+					cvt = 0;
+			} else
+				goto done;
+			break;
+		case 'x':
+			if (!yres_specified) {
+				yres = simple_strtol(&name[i+1], NULL, 10);
+				yres_specified = 1;
+			} else
+				goto done;
+		case '0' ... '9':
+			break;
+		case 'M':
+			if (!yres_specified)
+				cvt = 1;
+			break;
+		case 'R':
+			if (cvt)
+				rb = 1;
+			break;
+		case 'm':
+			if (!cvt)
+				margins = 1;
+			break;
+		case 'i':
+			if (!cvt)
+				interlace = 1;
+			break;
+		case 'e':
+			force = DRM_FORCE_ON;
+			break;
+		case 'D':
+			if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) &&
+			    (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB))
+				force = DRM_FORCE_ON;
+			else
+				force = DRM_FORCE_ON_DIGITAL;
+			break;
+		case 'd':
+			force = DRM_FORCE_OFF;
+			break;
+		default:
+			goto done;
+		}
+	}
+	if (i < 0 && yres_specified) {
+		xres = simple_strtol(name, NULL, 10);
+		res_specified = 1;
+	}
+done:
+
+	DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n",
+		drm_get_connector_name(connector), xres, yres,
+		(refresh) ? refresh : 60, (rb) ? " reduced blanking" :
+		"", (margins) ? " with margins" : "", (interlace) ?
+		" interlaced" : "");
+
+	if (force) {
+		const char *s;
+		switch (force) {
+		case DRM_FORCE_OFF: s = "OFF"; break;
+		case DRM_FORCE_ON_DIGITAL: s = "ON - dig"; break;
+		default:
+		case DRM_FORCE_ON: s = "ON"; break;
+		}
+
+		printf("forcing %s connector %s\n",
+			 drm_get_connector_name(connector), s);
+		connector->force = force;
+	}
+
+	if (res_specified) {
+		cmdline_mode->specified = true;
+		cmdline_mode->xres = xres;
+		cmdline_mode->yres = yres;
+	}
+
+	if (refresh_specified) {
+		cmdline_mode->refresh_specified = true;
+		cmdline_mode->refresh = refresh;
+	}
+
+	if (bpp_specified) {
+		cmdline_mode->bpp_specified = true;
+		cmdline_mode->bpp = bpp;
+	}
+	cmdline_mode->rb = rb ? true : false;
+	cmdline_mode->cvt = cvt  ? true : false;
+	cmdline_mode->interlace = interlace ? true : false;
+
+	return true;
+}
+
+static int
+fb_get_options(const char *connector_name, char **option)
+{
+
+	return (1);
+}
+
+static int drm_fb_helper_parse_command_line(struct drm_fb_helper *fb_helper)
+{
+	struct drm_fb_helper_connector *fb_helper_conn;
+	int i;
+
+	for (i = 0; i < fb_helper->connector_count; i++) {
+		char *option = NULL;
+
+		fb_helper_conn = fb_helper->connector_info[i];
+
+		/* do something on return - turn off connector maybe */
+		if (fb_get_options(drm_get_connector_name(fb_helper_conn->connector), &option))
+			continue;
+
+		drm_fb_helper_connector_parse_command_line(fb_helper_conn, option);
+	}
+	return 0;
+}
+
+#if 0
+static void drm_fb_helper_save_lut_atomic(struct drm_crtc *crtc, struct drm_fb_helper *helper)
+{
+	uint16_t *r_base, *g_base, *b_base;
+	int i;
+
+	r_base = crtc->gamma_store;
+	g_base = r_base + crtc->gamma_size;
+	b_base = g_base + crtc->gamma_size;
+
+	for (i = 0; i < crtc->gamma_size; i++)
+		helper->funcs->gamma_get(crtc, &r_base[i], &g_base[i], &b_base[i], i);
+}
+
+static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc)
+{
+	uint16_t *r_base, *g_base, *b_base;
+
+	r_base = crtc->gamma_store;
+	g_base = r_base + crtc->gamma_size;
+	b_base = g_base + crtc->gamma_size;
+
+	crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size);
+}
+#endif
+
+#if 0
+int drm_fb_helper_debug_enter(struct fb_info *info)
+{
+	struct drm_fb_helper *helper = info->par;
+	struct drm_crtc_helper_funcs *funcs;
+	int i;
+
+	if (list_empty(&kernel_fb_helper_list))
+		return false;
+
+	list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) {
+		for (i = 0; i < helper->crtc_count; i++) {
+			struct drm_mode_set *mode_set =
+				&helper->crtc_info[i].mode_set;
+
+			if (!mode_set->crtc->enabled)
+				continue;
+
+			funcs =	mode_set->crtc->helper_private;
+			drm_fb_helper_save_lut_atomic(mode_set->crtc, helper);
+			funcs->mode_set_base_atomic(mode_set->crtc,
+						    mode_set->fb,
+						    mode_set->x,
+						    mode_set->y,
+						    ENTER_ATOMIC_MODE_SET);
+		}
+	}
+
+	return 0;
+}
+#endif
+
+#if 0
+/* Find the real fb for a given fb helper CRTC */
+static struct drm_framebuffer *drm_mode_config_fb(struct drm_crtc *crtc)
+{
+	struct drm_device *dev = crtc->dev;
+	struct drm_crtc *c;
+
+	list_for_each_entry(c, &dev->mode_config.crtc_list, head) {
+		if (crtc->base.id == c->base.id)
+			return c->fb;
+	}
+
+	return NULL;
+}
+#endif
+
+#if 0
+int drm_fb_helper_debug_leave(struct fb_info *info)
+{
+	struct drm_fb_helper *helper = info->par;
+	struct drm_crtc *crtc;
+	struct drm_crtc_helper_funcs *funcs;
+	struct drm_framebuffer *fb;
+	int i;
+
+	for (i = 0; i < helper->crtc_count; i++) {
+		struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set;
+		crtc = mode_set->crtc;
+		funcs = crtc->helper_private;
+		fb = drm_mode_config_fb(crtc);
+
+		if (!crtc->enabled)
+			continue;
+
+		if (!fb) {
+			DRM_ERROR("no fb to restore??\n");
+			continue;
+		}
+
+		drm_fb_helper_restore_lut_atomic(mode_set->crtc);
+		funcs->mode_set_base_atomic(mode_set->crtc, fb, crtc->x,
+					    crtc->y, LEAVE_ATOMIC_MODE_SET);
+	}
+
+	return 0;
+}
+#endif
+
+bool drm_fb_helper_restore_fbdev_mode(struct drm_fb_helper *fb_helper)
+{
+	bool error = false;
+	int i, ret;
+	for (i = 0; i < fb_helper->crtc_count; i++) {
+		struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set;
+		ret = drm_crtc_helper_set_config(mode_set);
+		if (ret)
+			error = true;
+	}
+	return error;
+}
+
+#if 0
+bool drm_fb_helper_force_kernel_mode(void)
+{
+	bool ret, error = false;
+	struct drm_fb_helper *helper;
+
+	if (list_empty(&kernel_fb_helper_list))
+		return false;
+
+	list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) {
+		if (helper->dev->switch_power_state == DRM_SWITCH_POWER_OFF)
+			continue;
+
+		ret = drm_fb_helper_restore_fbdev_mode(helper);
+		if (ret)
+			error = true;
+	}
+	return error;
+}
+#endif
+
+#if 0
+int drm_fb_helper_panic(struct notifier_block *n, unsigned long ununsed,
+			void *panic_str)
+{
+	printf("panic occurred, switching back to text console\n");
+	return drm_fb_helper_force_kernel_mode();
+	return 0;
+}
+
+static struct notifier_block paniced = {
+	.notifier_call = drm_fb_helper_panic,
+};
+
+/**
+ * drm_fb_helper_restore - restore the framebuffer console (kernel) config
+ *
+ * Restore's the kernel's fbcon mode, used for lastclose & panic paths.
+ */
+void drm_fb_helper_restore(void)
+{
+	bool ret;
+	ret = drm_fb_helper_force_kernel_mode();
+	if (ret == true)
+		DRM_ERROR("Failed to restore crtc configuration\n");
+}
+
+#ifdef CONFIG_MAGIC_SYSRQ
+static void drm_fb_helper_restore_work_fn(struct work_struct *ignored)
+{
+	drm_fb_helper_restore();
+}
+static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn);
+
+static void drm_fb_helper_sysrq(int dummy1)
+{
+	schedule_work(&drm_fb_helper_restore_work);
+}
+
+static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = {
+	.handler = drm_fb_helper_sysrq,
+	.help_msg = "force-fb(V)",
+	.action_msg = "Restore framebuffer console",
+};
+#else
+static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { };
+#endif
+#endif
+
+#if 0
+static void drm_fb_helper_on(struct fb_info *info)
+{
+	struct drm_fb_helper *fb_helper = info->par;
+	struct drm_device *dev = fb_helper->dev;
+	struct drm_crtc *crtc;
+	struct drm_crtc_helper_funcs *crtc_funcs;
+	struct drm_connector *connector;
+	struct drm_encoder *encoder;
+	int i, j;
+
+	/*
+	 * For each CRTC in this fb, turn the crtc on then,
+	 * find all associated encoders and turn them on.
+	 */
+	mtx_enter(&dev->mode_config.mutex);
+	for (i = 0; i < fb_helper->crtc_count; i++) {
+		crtc = fb_helper->crtc_info[i].mode_set.crtc;
+		crtc_funcs = crtc->helper_private;
+
+		if (!crtc->enabled)
+			continue;
+
+		crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
+
+		/* Walk the connectors & encoders on this fb turning them on */
+		for (j = 0; j < fb_helper->connector_count; j++) {
+			connector = fb_helper->connector_info[j]->connector;
+			connector->dpms = DRM_MODE_DPMS_ON;
+			drm_connector_property_set_value(connector,
+							 dev->mode_config.dpms_property,
+							 DRM_MODE_DPMS_ON);
+		}
+		/* Found a CRTC on this fb, now find encoders */
+		TAILQ_FOREACH(encoder, &dev->mode_config.encoder_list, head) {
+			if (encoder->crtc == crtc) {
+				struct drm_encoder_helper_funcs *encoder_funcs;
+
+				encoder_funcs = encoder->helper_private;
+				encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
+			}
+		}
+	}
+	mtx_leave(&dev->mode_config.mutex);
+}
+#endif
+
+#if 0
+static void drm_fb_helper_off(struct fb_info *info, int dpms_mode)
+{
+	struct drm_fb_helper *fb_helper = info->par;
+	struct drm_device *dev = fb_helper->dev;
+	struct drm_crtc *crtc;
+	struct drm_crtc_helper_funcs *crtc_funcs;
+	struct drm_connector *connector;
+	struct drm_encoder *encoder;
+	int i, j;
+
+	/*
+	 * For each CRTC in this fb, find all associated encoders
+	 * and turn them off, then turn off the CRTC.
+	 */
+	mtx_enter(&dev->mode_config.mutex)
+	for (i = 0; i < fb_helper->crtc_count; i++) {
+		crtc = fb_helper->crtc_info[i].mode_set.crtc;
+		crtc_funcs = crtc->helper_private;
+
+		if (!crtc->enabled)
+			continue;
+
+		/* Walk the connectors on this fb and mark them off */
+		for (j = 0; j < fb_helper->connector_count; j++) {
+			connector = fb_helper->connector_info[j]->connector;
+			connector->dpms = dpms_mode;
+			drm_connector_property_set_value(connector,
+							 dev->mode_config.dpms_property,
+							 dpms_mode);
+		}
+		/* Found a CRTC on this fb, now find encoders */
+		TAILQ_FOREACH(encoder, &dev->mode_config.encoder_list, head) {
+			if (encoder->crtc == crtc) {
+				struct drm_encoder_helper_funcs *encoder_funcs;
+
+				encoder_funcs = encoder->helper_private;
+				encoder_funcs->dpms(encoder, dpms_mode);
+			}
+		}
+		crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
+	}
+	mtx_leave(&dev->mode_config.mutex);
+}
+#endif
+
+#if 0
+int drm_fb_helper_blank(int blank, struct fb_info *info)
+{
+	switch (blank) {
+	/* Display: On; HSync: On, VSync: On */
+	case FB_BLANK_UNBLANK:
+		drm_fb_helper_on(info);
+		break;
+	/* Display: Off; HSync: On, VSync: On */
+	case FB_BLANK_NORMAL:
+		drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
+		break;
+	/* Display: Off; HSync: Off, VSync: On */
+	case FB_BLANK_HSYNC_SUSPEND:
+		drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
+		break;
+	/* Display: Off; HSync: On, VSync: Off */
+	case FB_BLANK_VSYNC_SUSPEND:
+		drm_fb_helper_off(info, DRM_MODE_DPMS_SUSPEND);
+		break;
+	/* Display: Off; HSync: Off, VSync: Off */
+	case FB_BLANK_POWERDOWN:
+		drm_fb_helper_off(info, DRM_MODE_DPMS_OFF);
+		break;
+	}
+	return 0;
+}
+#endif
+
+static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper)
+{
+	int i;
+
+	for (i = 0; i < helper->connector_count; i++)
+		free(helper->connector_info[i], M_DRM);
+	free(helper->connector_info, M_DRM);
+	for (i = 0; i < helper->crtc_count; i++)
+		free(helper->crtc_info[i].mode_set.connectors, M_DRM);
+	free(helper->crtc_info, M_DRM);
+}
+
+int drm_fb_helper_init(struct drm_device *dev,
+		       struct drm_fb_helper *fb_helper,
+		       int crtc_count, int max_conn_count)
+{
+	struct drm_crtc *crtc;
+	int i;
+
+	fb_helper->dev = dev;
+
+	INIT_LIST_HEAD(&fb_helper->kernel_fb_list);
+
+	fb_helper->crtc_info = malloc(crtc_count *
+	    sizeof(struct drm_fb_helper_crtc), M_DRM, M_WAITOK | M_ZERO);
+
+	fb_helper->crtc_count = crtc_count;
+	fb_helper->connector_info = malloc(dev->mode_config.num_connector *
+	    sizeof(struct drm_fb_helper_connector *), M_DRM,
+	    M_WAITOK | M_ZERO);
+	fb_helper->connector_count = 0;
+
+	for (i = 0; i < crtc_count; i++) {
+		fb_helper->crtc_info[i].mode_set.connectors =
+			malloc(max_conn_count * sizeof(struct drm_connector *),
+			    M_DRM, M_WAITOK | M_ZERO);
+
+		fb_helper->crtc_info[i].mode_set.num_connectors = 0;
+	}
+
+	i = 0;
+	TAILQ_FOREACH(crtc, &dev->mode_config.crtc_list, head) {
+		fb_helper->crtc_info[i].crtc_id = crtc->base.id;
+		fb_helper->crtc_info[i].mode_set.crtc = crtc;
+		i++;
+	}
+	fb_helper->conn_limit = max_conn_count;
+	return 0;
+}
+
+void drm_fb_helper_fini(struct drm_fb_helper *fb_helper)
+{
+	if (!list_empty(&fb_helper->kernel_fb_list)) {
+		list_del(&fb_helper->kernel_fb_list);
+		if (list_empty(&kernel_fb_helper_list)) {
+#if 0
+			printk(KERN_INFO "drm: unregistered panic notifier\n");
+			atomic_notifier_chain_unregister(&panic_notifier_list,
+							 &paniced);
+			unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op);
+#endif
+		}
+	}
+
+	drm_fb_helper_crtc_free(fb_helper);
+
+}
+
+#if 0
+static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green,
+		     u16 blue, u16 regno, struct fb_info *info)
+{
+	struct drm_fb_helper *fb_helper = info->par;
+	struct drm_framebuffer *fb = fb_helper->fb;
+	int pindex;
+
+	if (info->fix.visual == FB_VISUAL_trueCOLOR) {
+		u32 *palette;
+		u32 value;
+		/* place color in psuedopalette */
+		if (regno > 16)
+			return -EINVAL;
+		palette = (u32 *)info->pseudo_palette;
+		red >>= (16 - info->var.red.length);
+		green >>= (16 - info->var.green.length);
+		blue >>= (16 - info->var.blue.length);
+		value = (red << info->var.red.offset) |
+			(green << info->var.green.offset) |
+			(blue << info->var.blue.offset);
+		if (info->var.transp.length > 0) {
+			u32 mask = (1 << info->var.transp.length) - 1;
+			mask <<= info->var.transp.offset;
+			value |= mask;
+		}
+		palette[regno] = value;
+		return 0;
+	}
+
+	pindex = regno;
+
+	if (fb->bits_per_pixel == 16) {
+		pindex = regno << 3;
+
+		if (fb->depth == 16 && regno > 63)
+			return -EINVAL;
+		if (fb->depth == 15 && regno > 31)
+			return -EINVAL;
+
+		if (fb->depth == 16) {
+			u16 r, g, b;
+			int i;
+			if (regno < 32) {
+				for (i = 0; i < 8; i++)
+					fb_helper->funcs->gamma_set(crtc, red,
+						green, blue, pindex + i);
+			}
+
+			fb_helper->funcs->gamma_get(crtc, &r,
+						    &g, &b,
+						    pindex >> 1);
+
+			for (i = 0; i < 4; i++)
+				fb_helper->funcs->gamma_set(crtc, r,
+							    green, b,
+							    (pindex >> 1) + i);
+		}
+	}
+
+	if (fb->depth != 16)
+		fb_helper->funcs->gamma_set(crtc, red, green, blue, pindex);
+	return 0;
+}
+#endif
+
+#if 0
+int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info)
+{
+	struct drm_fb_helper *fb_helper = info->par;
+	struct drm_crtc_helper_funcs *crtc_funcs;
+	u16 *red, *green, *blue, *transp;
+	struct drm_crtc *crtc;
+	int i, j, rc = 0;
+	int start;
+
+	for (i = 0; i < fb_helper->crtc_count; i++) {
+		crtc = fb_helper->crtc_info[i].mode_set.crtc;
+		crtc_funcs = crtc->helper_private;
+
+		red = cmap->red;
+		green = cmap->green;
+		blue = cmap->blue;
+		transp = cmap->transp;
+		start = cmap->start;
+
+		for (j = 0; j < cmap->len; j++) {
+			u16 hred, hgreen, hblue, htransp = 0xffff;
+
+			hred = *red++;
+			hgreen = *green++;
+			hblue = *blue++;
+
+			if (transp)
+				htransp = *transp++;
+
+			rc = setcolreg(crtc, hred, hgreen, hblue, start++, info);
+			if (rc)
+				return rc;
+		}
+		crtc_funcs->load_lut(crtc);
+	}
+	return rc;
+}
+#endif
+
+#if 0
+int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
+			    struct fb_info *info)
+{
+	struct drm_fb_helper *fb_helper = info->par;
+	struct drm_framebuffer *fb = fb_helper->fb;
+	int depth;
+
+	if (var->pixclock != 0 || in_dbg_master())
+		return -EINVAL;
+
+	/* Need to resize the fb object !!! */
+	if (var->bits_per_pixel > fb->bits_per_pixel ||
+	    var->xres > fb->width || var->yres > fb->height ||
+	    var->xres_virtual > fb->width || var->yres_virtual > fb->height) {
+		DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb "
+			  "request %dx%d-%d (virtual %dx%d) > %dx%d-%d\n",
+			  var->xres, var->yres, var->bits_per_pixel,
+			  var->xres_virtual, var->yres_virtual,
+			  fb->width, fb->height, fb->bits_per_pixel);
+		return -EINVAL;
+	}
+
+	switch (var->bits_per_pixel) {
+	case 16:
+		depth = (var->green.length == 6) ? 16 : 15;
+		break;
+	case 32:
+		depth = (var->transp.length > 0) ? 32 : 24;
+		break;
+	default:
+		depth = var->bits_per_pixel;
+		break;
+	}
+
+	switch (depth) {
+	case 8:
+		var->red.offset = 0;
+		var->green.offset = 0;
+		var->blue.offset = 0;
+		var->red.length = 8;
+		var->green.length = 8;
+		var->blue.length = 8;
+		var->transp.length = 0;
+		var->transp.offset = 0;
+		break;
+	case 15:
+		var->red.offset = 10;
+		var->green.offset = 5;
+		var->blue.offset = 0;
+		var->red.length = 5;
+		var->green.length = 5;
+		var->blue.length = 5;
+		var->transp.length = 1;
+		var->transp.offset = 15;
+		break;
+	case 16:
+		var->red.offset = 11;
+		var->green.offset = 5;
+		var->blue.offset = 0;
+		var->red.length = 5;
+		var->green.length = 6;
+		var->blue.length = 5;
+		var->transp.length = 0;
+		var->transp.offset = 0;
+		break;
+	case 24:
+		var->red.offset = 16;
+		var->green.offset = 8;
+		var->blue.offset = 0;
+		var->red.length = 8;
+		var->green.length = 8;
+		var->blue.length = 8;
+		var->transp.length = 0;
+		var->transp.offset = 0;
+		break;
+	case 32:
+		var->red.offset = 16;
+		var->green.offset = 8;
+		var->blue.offset = 0;
+		var->red.length = 8;
+		var->green.length = 8;
+		var->blue.length = 8;
+		var->transp.length = 8;
+		var->transp.offset = 24;
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+#endif
+
+#if 0
+/* this will let fbcon do the mode init */
+int drm_fb_helper_set_par(struct fb_info *info)
+{
+	struct drm_fb_helper *fb_helper = info->par;
+	struct drm_device *dev = fb_helper->dev;
+	struct fb_var_screeninfo *var = &info->var;
+	struct drm_crtc *crtc;
+	int ret;
+	int i;
+
+	if (var->pixclock != 0) {
+		DRM_ERROR("PIXEL CLOCK SET\n");
+		return -EINVAL;
+	}
+
+	mutex_lock(&dev->mode_config.mutex);
+	for (i = 0; i < fb_helper->crtc_count; i++) {
+		crtc = fb_helper->crtc_info[i].mode_set.crtc;
+		ret = crtc->funcs->set_config(&fb_helper->crtc_info[i].mode_set);
+		if (ret) {
+			mutex_unlock(&dev->mode_config.mutex);
+			return ret;
+		}
+	}
+	mutex_unlock(&dev->mode_config.mutex);
+
+	if (fb_helper->delayed_hotplug) {
+		fb_helper->delayed_hotplug = false;
+		drm_fb_helper_hotplug_event(fb_helper);
+	}
+	return 0;
+}
+#endif
+
+#if 0
+int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
+			      struct fb_info *info)
+{
+	struct drm_fb_helper *fb_helper = info->par;
+	struct drm_device *dev = fb_helper->dev;
+	struct drm_mode_set *modeset;
+	struct drm_crtc *crtc;
+	int ret = 0;
+	int i;
+
+	mutex_lock(&dev->mode_config.mutex);
+	for (i = 0; i < fb_helper->crtc_count; i++) {
+		crtc = fb_helper->crtc_info[i].mode_set.crtc;
+
+		modeset = &fb_helper->crtc_info[i].mode_set;
+
+		modeset->x = var->xoffset;
+		modeset->y = var->yoffset;
+
+		if (modeset->num_connectors) {
+			ret = crtc->funcs->set_config(modeset);
+			if (!ret) {
+				info->var.xoffset = var->xoffset;
+				info->var.yoffset = var->yoffset;
+			}
+		}
+	}
+	mutex_unlock(&dev->mode_config.mutex);
+	return ret;
+}
+#endif
+
+int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper,
+				  int preferred_bpp)
+{
+	int new_fb = 0;
+	int crtc_count = 0;
+	int i;
+#if 0
+	struct fb_info *info;
+#endif
+	struct drm_fb_helper_surface_size sizes;
+	int gamma_size = 0;
+
+	memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size));
+	sizes.surface_depth = 24;
+	sizes.surface_bpp = 32;
+	sizes.fb_width = (unsigned)-1;
+	sizes.fb_height = (unsigned)-1;
+
+	/* if driver picks 8 or 16 by default use that
+	   for both depth/bpp */
+	if (preferred_bpp != sizes.surface_bpp) {
+		sizes.surface_depth = sizes.surface_bpp = preferred_bpp;
+	}
+	/* first up get a count of crtcs now in use and new min/maxes width/heights */
+	for (i = 0; i < fb_helper->connector_count; i++) {
+		struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i];
+		struct drm_fb_helper_cmdline_mode *cmdline_mode;
+
+		cmdline_mode = &fb_helper_conn->cmdline_mode;
+
+		if (cmdline_mode->bpp_specified) {
+			switch (cmdline_mode->bpp) {
+			case 8:
+				sizes.surface_depth = sizes.surface_bpp = 8;
+				break;
+			case 15:
+				sizes.surface_depth = 15;
+				sizes.surface_bpp = 16;
+				break;
+			case 16:
+				sizes.surface_depth = sizes.surface_bpp = 16;
+				break;
+			case 24:
+				sizes.surface_depth = sizes.surface_bpp = 24;
+				break;
+			case 32:
+				sizes.surface_depth = 24;
+				sizes.surface_bpp = 32;
+				break;
+			}
+			break;
+		}
+	}
+
+	crtc_count = 0;
+	for (i = 0; i < fb_helper->crtc_count; i++) {
+		struct drm_display_mode *desired_mode;
+		desired_mode = fb_helper->crtc_info[i].desired_mode;
+
+		if (desired_mode) {
+			if (gamma_size == 0)
+				gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size;
+			if (desired_mode->hdisplay < sizes.fb_width)
+				sizes.fb_width = desired_mode->hdisplay;
+			if (desired_mode->vdisplay < sizes.fb_height)
+				sizes.fb_height = desired_mode->vdisplay;
+			if (desired_mode->hdisplay > sizes.surface_width)
+				sizes.surface_width = desired_mode->hdisplay;
+			if (desired_mode->vdisplay > sizes.surface_height)
+				sizes.surface_height = desired_mode->vdisplay;
+			crtc_count++;
+		}
+	}
+
+	if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) {
+		/* hmm everyone went away - assume VGA cable just fell out
+		   and will come back later. */
+		printf("Cannot find any crtc or sizes - going 1024x768\n");
+		sizes.fb_width = sizes.surface_width = 1024;
+		sizes.fb_height = sizes.surface_height = 768;
+	}
+
+	/* push down into drivers */
+	new_fb = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes);
+	if (new_fb < 0)
+		return new_fb;
+
+#if 0
+	info = fb_helper->fbdev;
+#endif
+
+	/* set the fb pointer */
+	for (i = 0; i < fb_helper->crtc_count; i++) {
+		fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb;
+	}
+
+#if 0
+	if (new_fb) {
+		info->var.pixclock = 0;
+		if (register_framebuffer(info) < 0) {
+			return -EINVAL;
+		}
+
+		printf("fb%d: %s frame buffer device\n", info->node,
+		       info->fix.id);
+
+	} else {
+		drm_fb_helper_set_par(info);
+	}
+
+	/* Switch back to kernel console on panic */
+	/* multi card linked list maybe */
+	if (list_empty(&kernel_fb_helper_list)) {
+		printf("drm: registered panic notifier\n");
+		atomic_notifier_chain_register(&panic_notifier_list,
+					       &paniced);
+	}
+	if (new_fb)
+		list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list);
+#endif
+
+	return 0;
+}
+
+#if 0
+void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
+			    uint32_t depth)
+{
+	info->fix.type = FB_TYPE_PACKED_PIXELS;
+	info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR :
+		FB_VISUAL_trueCOLOR;
+	info->fix.mmio_start = 0;
+	info->fix.mmio_len = 0;
+	info->fix.type_aux = 0;
+	info->fix.xpanstep = 1; /* doing it in hw */
+	info->fix.ypanstep = 1; /* doing it in hw */
+	info->fix.ywrapstep = 0;
+	info->fix.accel = FB_ACCEL_NONE;
+	info->fix.type_aux = 0;
+
+	info->fix.line_length = pitch;
+	return;
+}
+
+void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper,
+			    uint32_t fb_width, uint32_t fb_height)
+{
+	struct drm_framebuffer *fb = fb_helper->fb;
+	info->pseudo_palette = fb_helper->pseudo_palette;
+	info->var.xres_virtual = fb->width;
+	info->var.yres_virtual = fb->height;
+	info->var.bits_per_pixel = fb->bits_per_pixel;
+	info->var.accel_flags = FB_ACCELF_TEXT;
+	info->var.xoffset = 0;
+	info->var.yoffset = 0;
+	info->var.activate = FB_ACTIVATE_NOW;
+	info->var.height = -1;
+	info->var.width = -1;
+
+	switch (fb->depth) {
+	case 8:
+		info->var.red.offset = 0;
+		info->var.green.offset = 0;
+		info->var.blue.offset = 0;
+		info->var.red.length = 8; /* 8bit DAC */
+		info->var.green.length = 8;
+		info->var.blue.length = 8;
+		info->var.transp.offset = 0;
+		info->var.transp.length = 0;
+		break;
+	case 15:
+		info->var.red.offset = 10;
+		info->var.green.offset = 5;
+		info->var.blue.offset = 0;
+		info->var.red.length = 5;
+		info->var.green.length = 5;
+		info->var.blue.length = 5;
+		info->var.transp.offset = 15;
+		info->var.transp.length = 1;
+		break;
+	case 16:
+		info->var.red.offset = 11;
+		info->var.green.offset = 5;
+		info->var.blue.offset = 0;
+		info->var.red.length = 5;
+		info->var.green.length = 6;
+		info->var.blue.length = 5;
+		info->var.transp.offset = 0;
+		break;
+	case 24:
+		info->var.red.offset = 16;
+		info->var.green.offset = 8;
+		info->var.blue.offset = 0;
+		info->var.red.length = 8;
+		info->var.green.length = 8;
+		info->var.blue.length = 8;
+		info->var.transp.offset = 0;
+		info->var.transp.length = 0;
+		break;
+	case 32:
+		info->var.red.offset = 16;
+		info->var.green.offset = 8;
+		info->var.blue.offset = 0;
+		info->var.red.length = 8;
+		info->var.green.length = 8;
+		info->var.blue.length = 8;
+		info->var.transp.offset = 24;
+		info->var.transp.length = 8;
+		break;
+	default:
+		break;
+	}
+
+	info->var.xres = fb_width;
+	info->var.yres = fb_height;
+}
+#endif
+
+static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper,
+					       uint32_t maxX,
+					       uint32_t maxY)
+{
+	struct drm_connector *connector;
+	int count = 0;
+	int i;
+
+	for (i = 0; i < fb_helper->connector_count; i++) {
+		connector = fb_helper->connector_info[i]->connector;
+		count += connector->funcs->fill_modes(connector, maxX, maxY);
+	}
+
+	return count;
+}
+
+static struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height)
+{
+	struct drm_display_mode *mode;
+
+	TAILQ_FOREACH(mode, &fb_connector->connector->modes, head) {
+		if (drm_mode_width(mode) > width ||
+		    drm_mode_height(mode) > height)
+			continue;
+		if (mode->type & DRM_MODE_TYPE_PREFERRED)
+			return mode;
+	}
+	return NULL;
+}
+
+static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector)
+{
+	struct drm_fb_helper_cmdline_mode *cmdline_mode;
+	cmdline_mode = &fb_connector->cmdline_mode;
+	return cmdline_mode->specified;
+}
+
+static struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn,
+						      int width, int height)
+{
+	printf("%s stub\n", __func__);
+	return (NULL);
+#ifdef notyet
+	struct drm_cmdline_mode *cmdline_mode;
+	struct drm_display_mode *mode = NULL;
+
+	cmdline_mode = &fb_helper_conn->cmdline_mode1;
+	if (cmdline_mode->specified == false &&
+	    !drm_fetch_cmdline_mode_from_kenv(fb_helper_conn->connector,
+	    cmdline_mode))
+			return (NULL);
+
+	/* attempt to find a matching mode in the list of modes
+	 *  we have gotten so far, if not add a CVT mode that conforms
+	 */
+	if (cmdline_mode->rb || cmdline_mode->margins)
+		goto create_mode;
+
+	TAILQ_FOREACH(mode, &fb_helper_conn->connector->modes, head) {
+		/* check width/height */
+		if (mode->hdisplay != cmdline_mode->xres ||
+		    mode->vdisplay != cmdline_mode->yres)
+			continue;
+
+		if (cmdline_mode->refresh_specified) {
+			if (mode->vrefresh != cmdline_mode->refresh)
+				continue;
+		}
+
+		if (cmdline_mode->interlace) {
+			if (!(mode->flags & DRM_MODE_FLAG_INTERLACE))
+				continue;
+		}
+		return mode;
+	}
+
+create_mode:
+	if (cmdline_mode->cvt)
+		mode = drm_cvt_mode(fb_helper_conn->connector->dev,
+				    cmdline_mode->xres, cmdline_mode->yres,
+				    cmdline_mode->refresh_specified ? cmdline_mode->refresh : 60,
+				    cmdline_mode->rb, cmdline_mode->interlace,
+				    cmdline_mode->margins);
+	else
+		mode = drm_gtf_mode(fb_helper_conn->connector->dev,
+				    cmdline_mode->xres, cmdline_mode->yres,
+				    cmdline_mode->refresh_specified ? cmdline_mode->refresh : 60,
+				    cmdline_mode->interlace,
+				    cmdline_mode->margins);
+	drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
+	TAILQ_INSERT_TAIL(&fb_helper_conn->connector->modes, mode, head);
+	return mode;
+#endif
+}
+
+static bool drm_connector_enabled(struct drm_connector *connector, bool strict)
+{
+	bool enable;
+
+	if (strict) {
+		enable = connector->status == connector_status_connected;
+	} else {
+		enable = connector->status != connector_status_disconnected;
+	}
+	return enable;
+}
+
+static void drm_enable_connectors(struct drm_fb_helper *fb_helper,
+				  bool *enabled)
+{
+	bool any_enabled = false;
+	struct drm_connector *connector;
+	int i = 0;
+
+	for (i = 0; i < fb_helper->connector_count; i++) {
+		connector = fb_helper->connector_info[i]->connector;
+		enabled[i] = drm_connector_enabled(connector, true);
+		DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id,
+			  enabled[i] ? "yes" : "no");
+		any_enabled |= enabled[i];
+	}
+
+	if (any_enabled)
+		return;
+
+	for (i = 0; i < fb_helper->connector_count; i++) {
+		connector = fb_helper->connector_info[i]->connector;
+		enabled[i] = drm_connector_enabled(connector, false);
+	}
+}
+
+static bool drm_target_cloned(struct drm_fb_helper *fb_helper,
+			      struct drm_display_mode **modes,
+			      bool *enabled, int width, int height)
+{
+	int count, i, j;
+	bool can_clone = false;
+	struct drm_fb_helper_connector *fb_helper_conn;
+	struct drm_display_mode *dmt_mode, *mode;
+
+	/* only contemplate cloning in the single crtc case */
+	if (fb_helper->crtc_count > 1)
+		return false;
+
+	count = 0;
+	for (i = 0; i < fb_helper->connector_count; i++) {
+		if (enabled[i])
+			count++;
+	}
+
+	/* only contemplate cloning if more than one connector is enabled */
+	if (count <= 1)
+		return false;
+
+	/* check the command line or if nothing common pick 1024x768 */
+	can_clone = true;
+	for (i = 0; i < fb_helper->connector_count; i++) {
+		if (!enabled[i])
+			continue;
+		fb_helper_conn = fb_helper->connector_info[i];
+		modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height);
+		if (!modes[i]) {
+			can_clone = false;
+			break;
+		}
+		for (j = 0; j < i; j++) {
+			if (!enabled[j])
+				continue;
+			if (!drm_mode_equal(modes[j], modes[i]))
+				can_clone = false;
+		}
+	}
+
+	if (can_clone) {
+		DRM_DEBUG_KMS("can clone using command line\n");
+		return true;
+	}
+
+	/* try and find a 1024x768 mode on each connector */
+	can_clone = true;
+	dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60);
+
+	for (i = 0; i < fb_helper->connector_count; i++) {
+
+		if (!enabled[i])
+			continue;
+
+		fb_helper_conn = fb_helper->connector_info[i];
+		TAILQ_FOREACH(mode, &fb_helper_conn->connector->modes, head) {
+			if (drm_mode_equal(mode, dmt_mode))
+				modes[i] = mode;
+		}
+		if (!modes[i])
+			can_clone = false;
+	}
+
+	if (can_clone) {
+		DRM_DEBUG_KMS("can clone using 1024x768\n");
+		return true;
+	}
+	printf("kms: can't enable cloning when we probably wanted to.\n");
+	return false;
+}
+
+static bool drm_target_preferred(struct drm_fb_helper *fb_helper,
+				 struct drm_display_mode **modes,
+				 bool *enabled, int width, int height)
+{
+	struct drm_fb_helper_connector *fb_helper_conn;
+	int i;
+
+	for (i = 0; i < fb_helper->connector_count; i++) {
+		fb_helper_conn = fb_helper->connector_info[i];
+
+		if (enabled[i] == false)
+			continue;
+
+		DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n",
+			      fb_helper_conn->connector->base.id);
+
+		/* got for command line mode first */
+		modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height);
+		if (!modes[i]) {
+			DRM_DEBUG_KMS("looking for preferred mode on connector %d\n",
+				      fb_helper_conn->connector->base.id);
+			modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height);
+		}
+		/* No preferred modes, pick one off the list */
+		if (!modes[i] && !TAILQ_EMPTY(&fb_helper_conn->connector->modes)) {
+			TAILQ_FOREACH(modes[i], &fb_helper_conn->connector->modes, head)
+				break;
+		}
+		DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name :
+			  "none");
+	}
+	return true;
+}
+
+static int drm_pick_crtcs(struct drm_fb_helper *fb_helper,
+			  struct drm_fb_helper_crtc **best_crtcs,
+			  struct drm_display_mode **modes,
+			  int n, int width, int height)
+{
+	int c, o;
+	struct drm_device *dev = fb_helper->dev;
+	struct drm_connector *connector;
+	struct drm_connector_helper_funcs *connector_funcs;
+	struct drm_encoder *encoder;
+	struct drm_fb_helper_crtc *best_crtc;
+	int my_score, best_score, score;
+	struct drm_fb_helper_crtc **crtcs, *crtc;
+	struct drm_fb_helper_connector *fb_helper_conn;
+
+	if (n == fb_helper->connector_count)
+		return 0;
+
+	fb_helper_conn = fb_helper->connector_info[n];
+	connector = fb_helper_conn->connector;
+
+	best_crtcs[n] = NULL;
+	best_crtc = NULL;
+	best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height);
+	if (modes[n] == NULL)
+		return best_score;
+
+	crtcs = malloc(dev->mode_config.num_connector *
+	    sizeof(struct drm_fb_helper_crtc *), M_DRM,
+	    M_WAITOK | M_ZERO);
+
+	my_score = 1;
+	if (connector->status == connector_status_connected)
+		my_score++;
+	if (drm_has_cmdline_mode(fb_helper_conn))
+		my_score++;
+	if (drm_has_preferred_mode(fb_helper_conn, width, height))
+		my_score++;
+
+	connector_funcs = connector->helper_private;
+	encoder = connector_funcs->best_encoder(connector);
+	if (!encoder)
+		goto out;
+
+	/* select a crtc for this connector and then attempt to configure
+	   remaining connectors */
+	for (c = 0; c < fb_helper->crtc_count; c++) {
+		crtc = &fb_helper->crtc_info[c];
+
+		if ((encoder->possible_crtcs & (1 << c)) == 0) {
+			continue;
+		}
+
+		for (o = 0; o < n; o++)
+			if (best_crtcs[o] == crtc)
+				break;
+
+		if (o < n) {
+			/* ignore cloning unless only a single crtc */
+			if (fb_helper->crtc_count > 1)
+				continue;
+
+			if (!drm_mode_equal(modes[o], modes[n]))
+				continue;
+		}
+
+		crtcs[n] = crtc;
+		memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *));
+		score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1,
+						  width, height);
+		if (score > best_score) {
+			best_crtc = crtc;
+			best_score = score;
+			memcpy(best_crtcs, crtcs,
+			       dev->mode_config.num_connector *
+			       sizeof(struct drm_fb_helper_crtc *));
+		}
+	}
+out:
+	free(crtcs, M_DRM);
+	return best_score;
+}
+
+static void drm_setup_crtcs(struct drm_fb_helper *fb_helper)
+{
+	struct drm_device *dev = fb_helper->dev;
+	struct drm_fb_helper_crtc **crtcs;
+	struct drm_display_mode **modes;
+	struct drm_encoder *encoder;
+	struct drm_mode_set *modeset;
+	bool *enabled;
+	int width, height;
+	int i, ret;
+
+	DRM_DEBUG_KMS("\n");
+
+	width = dev->mode_config.max_width;
+	height = dev->mode_config.max_height;
+
+	/* clean out all the encoder/crtc combos */
+	TAILQ_FOREACH(encoder, &dev->mode_config.encoder_list, head) {
+		encoder->crtc = NULL;
+	}
+
+	crtcs = malloc(dev->mode_config.num_connector *
+	    sizeof(struct drm_fb_helper_crtc *), M_DRM,
+	    M_WAITOK | M_ZERO);
+	modes = malloc(dev->mode_config.num_connector *
+	    sizeof(struct drm_display_mode *), M_DRM,
+	    M_WAITOK | M_ZERO);
+	enabled = malloc(dev->mode_config.num_connector *
+	    sizeof(bool), M_DRM, M_WAITOK | M_ZERO);
+
+	drm_enable_connectors(fb_helper, enabled);
+
+	ret = drm_target_cloned(fb_helper, modes, enabled, width, height);
+	if (!ret) {
+		ret = drm_target_preferred(fb_helper, modes, enabled, width, height);
+		if (!ret)
+			DRM_ERROR("Unable to find initial modes\n");
+	}
+
+	DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width, height);
+
+	drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height);
+
+	/* need to set the modesets up here for use later */
+	/* fill out the connector<->crtc mappings into the modesets */
+	for (i = 0; i < fb_helper->crtc_count; i++) {
+		modeset = &fb_helper->crtc_info[i].mode_set;
+		modeset->num_connectors = 0;
+	}
+
+	for (i = 0; i < fb_helper->connector_count; i++) {
+		struct drm_display_mode *mode = modes[i];
+		struct drm_fb_helper_crtc *fb_crtc = crtcs[i];
+		modeset = &fb_crtc->mode_set;
+
+		if (mode && fb_crtc) {
+			DRM_DEBUG_KMS("desired mode %s set on crtc %d\n",
+				      mode->name, fb_crtc->mode_set.crtc->base.id);
+			fb_crtc->desired_mode = mode;
+			if (modeset->mode)
+				drm_mode_destroy(dev, modeset->mode);
+			modeset->mode = drm_mode_duplicate(dev,
+							   fb_crtc->desired_mode);
+			modeset->connectors[modeset->num_connectors++] = fb_helper->connector_info[i]->connector;
+		}
+	}
+
+	free(crtcs, M_DRM);
+	free(modes, M_DRM);
+	free(enabled, M_DRM);
+}
+
+/**
+ * drm_helper_initial_config - setup a sane initial connector configuration
+ * @dev: DRM device
+ *
+ * LOCKING:
+ * Called at init time, must take mode config lock.
+ *
+ * Scan the CRTCs and connectors and try to put together an initial setup.
+ * At the moment, this is a cloned configuration across all heads with
+ * a new framebuffer object as the backing store.
+ *
+ * RETURNS:
+ * Zero if everything went ok, nonzero otherwise.
+ */
+bool drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel)
+{
+	struct drm_device *dev = fb_helper->dev;
+	int count = 0;
+
+	/* disable all the possible outputs/crtcs before entering KMS mode */
+	drm_helper_disable_unused_functions(fb_helper->dev);
+
+	drm_fb_helper_parse_command_line(fb_helper);
+
+	count = drm_fb_helper_probe_connector_modes(fb_helper,
+						    dev->mode_config.max_width,
+						    dev->mode_config.max_height);
+	/*
+	 * we shouldn't end up with no modes here.
+	 */
+	if (count == 0) {
+		printf("No connectors reported connected with modes\n");
+	}
+	drm_setup_crtcs(fb_helper);
+
+	return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
+}
+
+int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper)
+{
+	struct drm_device *dev = fb_helper->dev;
+	int count = 0;
+	u32 max_width, max_height, bpp_sel;
+	bool bound = false, crtcs_bound = false;
+	struct drm_crtc *crtc;
+
+	if (!fb_helper->fb)
+		return 0;
+
+	mtx_enter(&dev->mode_config.mutex);
+	TAILQ_FOREACH(crtc, &dev->mode_config.crtc_list, head) {
+		if (crtc->fb)
+			crtcs_bound = true;
+		if (crtc->fb == fb_helper->fb)
+			bound = true;
+	}
+
+	if (!bound && crtcs_bound) {
+		fb_helper->delayed_hotplug = true;
+		mtx_leave(&dev->mode_config.mutex);
+		return 0;
+	}
+	DRM_DEBUG_KMS("\n");
+
+	max_width = fb_helper->fb->width;
+	max_height = fb_helper->fb->height;
+	bpp_sel = fb_helper->fb->bits_per_pixel;
+
+	count = drm_fb_helper_probe_connector_modes(fb_helper, max_width,
+						    max_height);
+	mtx_leave(&dev->mode_config.mutex);
+
+	return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
+}
+
diff --git a/sys/dev/pci/drm/drm_fb_helper.h b/sys/dev/pci/drm/drm_fb_helper.h
index 8210c69b075..44b45df036f 100644
--- a/sys/dev/pci/drm/drm_fb_helper.h
+++ b/sys/dev/pci/drm/drm_fb_helper.h
@@ -30,8 +30,9 @@
 #ifndef DRM_FB_HELPER_H
 #define DRM_FB_HELPER_H
 
-struct drm_fb_helper;
+#include "drm_linux_list.h"
 
+struct drm_fb_helper;
 
 struct drm_fb_helper_crtc {
 	uint32_t crtc_id;
@@ -39,6 +40,20 @@ struct drm_fb_helper_crtc {
 	struct drm_display_mode *desired_mode;
 };
 
+/* mode specified on the command line */
+struct drm_fb_helper_cmdline_mode {
+	bool specified;
+	bool refresh_specified;
+	bool bpp_specified;
+	int xres, yres;
+	int bpp;
+	int refresh;
+	bool rb;
+	bool interlace;
+	bool cvt;
+	bool margins;
+};
+
 struct drm_fb_helper_surface_size {
 	u32 fb_width;
 	u32 fb_height;
@@ -59,8 +74,9 @@ struct drm_fb_helper_funcs {
 };
 
 struct drm_fb_helper_connector {
+	struct drm_fb_helper_cmdline_mode cmdline_mode;
+	struct drm_cmdline_mode cmdline_mode1;
 	struct drm_connector *connector;
-	struct drm_cmdline_mode cmdline_mode;
 };
 
 struct drm_fb_helper {
@@ -76,13 +92,16 @@ struct drm_fb_helper {
 	int conn_limit;
 	struct fb_info *fbdev;
 	u32 pseudo_palette[17];
-	// struct list_head kernel_fb_list;
+	struct list_head kernel_fb_list;
 
 	/* we got a hotplug but fbdev wasn't running the console
 	   delay until next set_par */
 	bool delayed_hotplug;
 };
 
+struct fb_var_screeninfo;
+struct fb_cmap;
+
 int drm_fb_helper_single_fb_probe(struct drm_fb_helper *helper,
 				  int preferred_bpp);
 
diff --git a/sys/dev/pci/drm/files.drm b/sys/dev/pci/drm/files.drm
index fdc8f4df4dc..9563cf6bab3 100644
--- a/sys/dev/pci/drm/files.drm
+++ b/sys/dev/pci/drm/files.drm
@@ -18,6 +18,7 @@ file   dev/pci/drm/drm_crtc.c		drm
 file   dev/pci/drm/drm_modes.c		drm
 file   dev/pci/drm/drm_crtc_helper.c	drm
 file   dev/pci/drm/drm_edid.c		drm
+file   dev/pci/drm/drm_fb_helper.c	drm
 
 device	inteldrm: drmbase
 attach	inteldrm at drmdev
diff --git a/sys/dev/pci/drm/intel_drv.h b/sys/dev/pci/drm/intel_drv.h
index 9bde726f1b7..dbd4db436d6 100644
--- a/sys/dev/pci/drm/intel_drv.h
+++ b/sys/dev/pci/drm/intel_drv.h
@@ -32,7 +32,7 @@
 #include "i915_drv.h"
 #include "drm_crtc.h"
 #include "drm_crtc_helper.h"
-//#include "drm_fb_helper.h"
+#include "drm_fb_helper.h"
 
 #define KHz(x) (1000*x)
 #define MHz(x) KHz(1000*x)
@@ -112,7 +112,7 @@ struct intel_framebuffer {
 };
 
 struct intel_fbdev {
-//	struct drm_fb_helper helper;
+	struct drm_fb_helper helper;
 	struct intel_framebuffer ifb;
 //	struct list_head fbdev_list;
 	struct drm_display_mode *our_mode;
diff --git a/sys/dev/pci/drm/intel_fb.c b/sys/dev/pci/drm/intel_fb.c
index ae12cd718b7..182eb65c588 100644
--- a/sys/dev/pci/drm/intel_fb.c
+++ b/sys/dev/pci/drm/intel_fb.c
@@ -1,15 +1,273 @@
+/*
+ * Copyright © 2007 David Airlie
+ *
+ * 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:
+ *     David Airlie
+ */
+
 #include "drmP.h"
 #include "drm.h"
+#include "drm_crtc.h"
+#include "drm_fb_helper.h"
+#include "i915_drm.h"
 #include "i915_drv.h"
 #include "intel_drv.h"
 
-void intel_fb_output_poll_changed(struct drm_device *dev)
+static int intelfb_create(struct intel_fbdev *ifbdev,
+			  struct drm_fb_helper_surface_size *sizes)
+{
+	struct drm_device *dev = ifbdev->helper.dev;
+#if 0
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct fb_info *info;
+#endif
+	struct drm_framebuffer *fb;
+	struct drm_mode_fb_cmd2 mode_cmd;
+	struct drm_obj *obj;
+	struct inteldrm_obj *obj_priv;
+	int size, ret;
+
+	/* we don't do packed 24bpp */
+	if (sizes->surface_bpp == 24)
+		sizes->surface_bpp = 32;
+
+	mode_cmd.width = sizes->surface_width;
+	mode_cmd.height = sizes->surface_height;
+
+	mode_cmd.pitches[0] = roundup2(mode_cmd.width * ((sizes->surface_bpp + 7) /
+							 8), 64);
+	mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
+							  sizes->surface_depth);
+
+	size = mode_cmd.pitches[0] * mode_cmd.height;
+	size = roundup2(size, PAGE_SIZE);
+	obj = drm_gem_object_alloc(dev, size);
+	if (!obj) {
+		DRM_ERROR("failed to allocate framebuffer\n");
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	DRM_LOCK();
+
+	/* Flush everything out, we'll be doing GTT only from now on */
+	ret = intel_pin_and_fence_fb_obj(dev, obj, false);
+	if (ret) {
+		DRM_ERROR("failed to pin fb: %d\n", ret);
+		goto out_unref;
+	}
+
+#if 0
+	info = framebuffer_alloc(0, device);
+	if (!info) {
+		ret = -ENOMEM;
+		goto out_unpin;
+	}
+
+	info->par = ifbdev;
+#endif
+
+	obj_priv = (struct inteldrm_obj *)obj;
+	ret = intel_framebuffer_init(dev, &ifbdev->ifb, &mode_cmd, obj_priv);
+	if (ret)
+		goto out_unpin;
+
+	fb = &ifbdev->ifb.base;
+
+	ifbdev->helper.fb = fb;
+#if 0
+	ifbdev->helper.fbdev = info;
+
+	strlcpy(info->fix.id, "inteldrmfb", sizeof(info->fix.id));
+
+	info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
+	info->fbops = &intelfb_ops;
+
+	ret = fb_alloc_cmap(&info->cmap, 256, 0);
+	if (ret) {
+		ret = -ENOMEM;
+		goto out_unpin;
+	}
+	/* setup aperture base/size for vesafb takeover */
+	info->apertures = alloc_apertures(1);
+	if (!info->apertures) {
+		ret = -ENOMEM;
+		goto out_unpin;
+	}
+	info->apertures->ranges[0].base = dev->mode_config.fb_base;
+	info->apertures->ranges[0].size =
+		dev_priv->mm.gtt->gtt_mappable_entries << PAGE_SHIFT;
+
+	info->fix.smem_start = dev->mode_config.fb_base + obj->gtt_offset;
+	info->fix.smem_len = size;
+
+	info->screen_base = ioremap_wc(dev->agp->base + obj->gtt_offset, size);
+	if (!info->screen_base) {
+		ret = -ENOSPC;
+		goto out_unpin;
+	}
+	info->screen_size = size;
+
+//	memset(info->screen_base, 0, size);
+
+	drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
+	drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
+
+	/* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
+#endif
+
+	DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08x, bo %p\n",
+		      fb->width, fb->height,
+		      obj_priv->gtt_offset, obj);
+
+	DRM_UNLOCK();
+#if 1
+	printf("skipping call to vga_switcheroo_client_fb_set\n");
+#else
+	vga_switcheroo_client_fb_set(dev->pdev, info);
+#endif
+	return 0;
+
+out_unpin:
+	i915_gem_object_unpin(obj);
+out_unref:
+	drm_gem_object_unreference(obj);
+	DRM_UNLOCK();
+out:
+	return ret;
+}
+
+static int intel_fb_find_or_create_single(struct drm_fb_helper *helper,
+					  struct drm_fb_helper_surface_size *sizes)
 {
-	printf("%s stub\n", __func__);
+	struct intel_fbdev *ifbdev = (struct intel_fbdev *)helper;
+	int new_fb = 0;
+	int ret;
+
+	if (!helper->fb) {
+		ret = intelfb_create(ifbdev, sizes);
+		if (ret)
+			return ret;
+		new_fb = 1;
+	}
+	return new_fb;
+}
+
+static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
+	.gamma_set = intel_crtc_fb_gamma_set,
+	.gamma_get = intel_crtc_fb_gamma_get,
+	.fb_probe = intel_fb_find_or_create_single,
+};
+
+static void intel_fbdev_destroy(struct drm_device *dev,
+				struct intel_fbdev *ifbdev)
+{
+#if 0
+	struct fb_info *info;
+#endif
+	struct intel_framebuffer *ifb = &ifbdev->ifb;
+	struct drm_obj *obj;
+
+#if 0
+	if (ifbdev->helper.fbdev) {
+		info = ifbdev->helper.fbdev;
+		unregister_framebuffer(info);
+		iounmap(info->screen_base);
+		if (info->cmap.len)
+			fb_dealloc_cmap(&info->cmap);
+		framebuffer_release(info);
+	}
+#endif
+
+	drm_fb_helper_fini(&ifbdev->helper);
+
+	drm_framebuffer_cleanup(&ifb->base);
+	if (ifb->obj) {
+		obj = (struct drm_obj *)ifb->obj;
+		drm_gem_object_unreference(obj);
+		ifb->obj = NULL;
+	}
 }
 
 int intel_fbdev_init(struct drm_device *dev)
 {
-	printf("%s stub\n", __func__);
-	return EINVAL;
+printf("skipping %s\n", __func__);
+return -1;
+	struct intel_fbdev *ifbdev;
+	struct inteldrm_softc *dev_priv = dev->dev_private;
+	int ret;
+
+	ifbdev = malloc(sizeof(struct intel_fbdev), M_DRM,
+	    M_WAITOK | M_ZERO);
+
+	dev_priv->fbdev = ifbdev;
+	ifbdev->helper.funcs = &intel_fb_helper_funcs;
+
+	ret = drm_fb_helper_init(dev, &ifbdev->helper,
+				 dev_priv->num_pipe,
+				 INTELFB_CONN_LIMIT);
+	if (ret) {
+		free(ifbdev, M_DRM);
+		return ret;
+	}
+
+	drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
+	drm_fb_helper_initial_config(&ifbdev->helper, 32);
+	return 0;
+}
+
+void intel_fbdev_fini(struct drm_device *dev)
+{
+	struct inteldrm_softc *dev_priv = dev->dev_private;
+	if (!dev_priv->fbdev)
+		return;
+
+	intel_fbdev_destroy(dev, dev_priv->fbdev);
+	free(dev_priv->fbdev, M_DRM);
+	dev_priv->fbdev = NULL;
+}
+
+void intel_fb_output_poll_changed(struct drm_device *dev)
+{
+	struct inteldrm_softc *dev_priv = dev->dev_private;
+	drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
+}
+
+void intel_fb_restore_mode(struct drm_device *dev)
+{
+	int ret;
+	struct inteldrm_softc *dev_priv = dev->dev_private;
+	struct drm_mode_config *config = &dev->mode_config;
+	struct drm_plane *plane;
+
+	mtx_enter(&dev->mode_config.mutex);
+
+	ret = drm_fb_helper_restore_fbdev_mode(&dev_priv->fbdev->helper);
+	if (ret)
+		DRM_DEBUG("failed to restore crtc mode\n");
+
+	/* Be sure to shut off any planes that may be active */
+	TAILQ_FOREACH(plane, &config->plane_list, head)
+		plane->funcs->disable_plane(plane);
+
+	mtx_leave(&dev->mode_config.mutex);
 }