drm/kms: move driver specific fb common code to helper functions (v2)

Initially I always meant this code to be shared, but things
ran away from me before I got to it.

This refactors the i915 and radeon kms fbdev interaction layers
out into generic helpers + driver specific pieces.

It moves all the panic/sysrq enhancements to the core file,
and stores a linked list of kernel fbs. This could possibly be
improved to only store the fb which has fbcon on it for panics
etc.

radeon retains some specific codes used for a big endian
workaround.

changes:
fix oops in v1
fix freeing path for crtc_info
Reviewed-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: NDave Airlie <airlied@redhat.com>

drivers/gpu/drm/Makefile

@@ -11,7 +11,8 @@ drm-y       :=	drm_auth.o drm_bufs.o drm_cache.o \
 		drm_agpsupport.o drm_scatter.o ati_pcigart.o drm_pci.o \
 		drm_sysfs.o drm_hashtab.o drm_sman.o drm_mm.o \
 		drm_crtc.o drm_crtc_helper.o drm_modes.o drm_edid.o \
-		drm_info.o drm_debugfs.o drm_encoder_slave.o
+		drm_info.o drm_debugfs.o drm_encoder_slave.o \
+		drm_fb_helper.o
 
 drm-$(CONFIG_COMPAT) += drm_ioc32.o
 

drivers/gpu/drm/drm_fb_helper.c

+/*
+ * 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 <linux/sysrq.h>
+#include <linux/fb.h>
+#include "drmP.h"
+#include "drm_crtc.h"
+#include "drm_fb_helper.h"
+#include "drm_crtc_helper.h"
+
+static LIST_HEAD(kernel_fb_helper_list);
+
+bool drm_fb_helper_force_kernel_mode(void)
+{
+	int i = 0;
+	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) {
+		for (i = 0; i < helper->crtc_count; i++) {
+			struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set;
+			ret = drm_crtc_helper_set_config(mode_set);
+			if (ret)
+				error = true;
+		}
+	}
+	return error;
+}
+
+int drm_fb_helper_panic(struct notifier_block *n, unsigned long ununsed,
+			void *panic_str)
+{
+	DRM_ERROR("panic occurred, switching back to text console\n");
+	return drm_fb_helper_force_kernel_mode();
+	return 0;
+}
+EXPORT_SYMBOL(drm_fb_helper_panic);
+
+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");
+}
+EXPORT_SYMBOL(drm_fb_helper_restore);
+
+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, struct tty_struct *dummy3)
+{
+	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",
+};
+
+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_encoder *encoder;
+	int i;
+
+	/*
+	 * For each CRTC in this fb, turn the crtc on then,
+	 * find all associated encoders and turn them on.
+	 */
+	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+		struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
+
+		for (i = 0; i < fb_helper->crtc_count; i++) {
+			if (crtc->base.id == fb_helper->crtc_info[i].crtc_id)
+				break;
+		}
+
+		mutex_lock(&dev->mode_config.mutex);
+		crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
+		mutex_unlock(&dev->mode_config.mutex);
+
+		/* Found a CRTC on this fb, now find encoders */
+		list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
+			if (encoder->crtc == crtc) {
+				struct drm_encoder_helper_funcs *encoder_funcs;
+
+				encoder_funcs = encoder->helper_private;
+				mutex_lock(&dev->mode_config.mutex);
+				encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
+				mutex_unlock(&dev->mode_config.mutex);
+			}
+		}
+	}
+}
+
+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_encoder *encoder;
+	int i;
+
+	/*
+	 * For each CRTC in this fb, find all associated encoders
+	 * and turn them off, then turn off the CRTC.
+	 */
+	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+		struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
+
+		for (i = 0; i < fb_helper->crtc_count; i++) {
+			if (crtc->base.id == fb_helper->crtc_info[i].crtc_id)
+				break;
+		}
+
+		/* Found a CRTC on this fb, now find encoders */
+		list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
+			if (encoder->crtc == crtc) {
+				struct drm_encoder_helper_funcs *encoder_funcs;
+
+				encoder_funcs = encoder->helper_private;
+				mutex_lock(&dev->mode_config.mutex);
+				encoder_funcs->dpms(encoder, dpms_mode);
+				mutex_unlock(&dev->mode_config.mutex);
+			}
+		}
+		if (dpms_mode == DRM_MODE_DPMS_OFF) {
+			mutex_lock(&dev->mode_config.mutex);
+			crtc_funcs->dpms(crtc, dpms_mode);
+			mutex_unlock(&dev->mode_config.mutex);
+		}
+	}
+}
+
+int drm_fb_helper_blank(int blank, struct fb_info *info)
+{
+	switch (blank) {
+	case FB_BLANK_UNBLANK:
+		drm_fb_helper_on(info);
+		break;
+	case FB_BLANK_NORMAL:
+		drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
+		break;
+	case FB_BLANK_HSYNC_SUSPEND:
+		drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
+		break;
+	case FB_BLANK_VSYNC_SUSPEND:
+		drm_fb_helper_off(info, DRM_MODE_DPMS_SUSPEND);
+		break;
+	case FB_BLANK_POWERDOWN:
+		drm_fb_helper_off(info, DRM_MODE_DPMS_OFF);
+		break;
+	}
+	return 0;
+}
+EXPORT_SYMBOL(drm_fb_helper_blank);
+
+static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper)
+{
+	int i;
+
+	for (i = 0; i < helper->crtc_count; i++)
+		kfree(helper->crtc_info[i].mode_set.connectors);
+	kfree(helper->crtc_info);
+}
+
+int drm_fb_helper_init_crtc_count(struct drm_fb_helper *helper, int crtc_count, int max_conn_count)
+{
+	struct drm_device *dev = helper->dev;
+	struct drm_crtc *crtc;
+	int ret = 0;
+	int i;
+
+	helper->crtc_info = kcalloc(crtc_count, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL);
+	if (!helper->crtc_info)
+		return -ENOMEM;
+
+	helper->crtc_count = crtc_count;
+
+	for (i = 0; i < crtc_count; i++) {
+		helper->crtc_info[i].mode_set.connectors =
+			kcalloc(max_conn_count,
+				sizeof(struct drm_connector *),
+				GFP_KERNEL);
+
+		if (!helper->crtc_info[i].mode_set.connectors) {
+			ret = -ENOMEM;
+			goto out_free;
+		}
+		helper->crtc_info[i].mode_set.num_connectors = 0;
+	}
+
+	i = 0;
+	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+		helper->crtc_info[i].crtc_id = crtc->base.id;
+		helper->crtc_info[i].mode_set.crtc = crtc;
+		i++;
+	}
+	helper->conn_limit = max_conn_count;
+	return 0;
+out_free:
+	drm_fb_helper_crtc_free(helper);
+	return -ENOMEM;
+}
+EXPORT_SYMBOL(drm_fb_helper_init_crtc_count);
+
+int drm_fb_helper_setcolreg(unsigned regno,
+			    unsigned red,
+			    unsigned green,
+			    unsigned blue,
+			    unsigned transp,
+			    struct fb_info *info)
+{
+	struct drm_fb_helper *fb_helper = info->par;
+	struct drm_device *dev = fb_helper->dev;
+	struct drm_crtc *crtc;
+	int i;
+
+	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+		struct drm_framebuffer *fb = fb_helper->fb;
+
+		for (i = 0; i < fb_helper->crtc_count; i++) {
+			if (crtc->base.id == fb_helper->crtc_info[i].crtc_id)
+				break;
+		}
+		if (i == fb_helper->crtc_count)
+			continue;
+
+		if (regno > 255)
+			return 1;
+
+		if (fb->depth == 8) {
+			fb_helper->funcs->gamma_set(crtc, red, green, blue, regno);
+			return 0;
+		}
+
+		if (regno < 16) {
+			switch (fb->depth) {
+			case 15:
+				fb->pseudo_palette[regno] = ((red & 0xf800) >> 1) |
+					((green & 0xf800) >>  6) |
+					((blue & 0xf800) >> 11);
+				break;
+			case 16:
+				fb->pseudo_palette[regno] = (red & 0xf800) |
+					((green & 0xfc00) >>  5) |
+					((blue  & 0xf800) >> 11);
+				break;
+			case 24:
+			case 32:
+				fb->pseudo_palette[regno] =
+					(((red >> 8) & 0xff) << info->var.red.offset) |
+					(((green >> 8) & 0xff) << info->var.green.offset) |
+					(((blue >> 8) & 0xff) << info->var.blue.offset);
+				break;
+			}
+		}
+	}
+	return 0;
+}
+EXPORT_SYMBOL(drm_fb_helper_setcolreg);
+
+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 == -1 || !var->pixclock)
+		return -EINVAL;
+
+	/* Need to resize the fb object !!! */
+	if (var->xres > fb->width || var->yres > fb->height) {
+		DRM_ERROR("Requested width/height is greater than current fb "
+			   "object %dx%d > %dx%d\n", var->xres, var->yres,
+			   fb->width, fb->height);
+		DRM_ERROR("Need resizing code.\n");
+		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;
+}
+EXPORT_SYMBOL(drm_fb_helper_check_var);
+
+/* 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 != -1) {
+		DRM_ERROR("PIXEL CLCOK SET\n");
+		return -EINVAL;
+	}
+
+	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+
+		for (i = 0; i < fb_helper->crtc_count; i++) {
+			if (crtc->base.id == fb_helper->crtc_info[i].crtc_id)
+				break;
+		}
+		if (i == fb_helper->crtc_count)
+			continue;
+
+		if (crtc->fb == fb_helper->crtc_info[i].mode_set.fb) {
+			mutex_lock(&dev->mode_config.mutex);
+			ret = crtc->funcs->set_config(&fb_helper->crtc_info->mode_set);
+			mutex_unlock(&dev->mode_config.mutex);
+			if (ret)
+				return ret;
+		}
+	}
+	return 0;
+}
+EXPORT_SYMBOL(drm_fb_helper_set_par);
+
+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;
+
+	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+		for (i = 0; i < fb_helper->crtc_count; i++) {
+			if (crtc->base.id == fb_helper->crtc_info[i].crtc_id)
+				break;
+		}
+
+		if (i == fb_helper->crtc_count)
+			continue;
+
+		modeset = &fb_helper->crtc_info[i].mode_set;
+
+		modeset->x = var->xoffset;
+		modeset->y = var->yoffset;
+
+		if (modeset->num_connectors) {
+			mutex_lock(&dev->mode_config.mutex);
+			ret = crtc->funcs->set_config(modeset);
+			mutex_unlock(&dev->mode_config.mutex);
+			if (!ret) {
+				info->var.xoffset = var->xoffset;
+				info->var.yoffset = var->yoffset;
+			}
+		}
+	}
+	return ret;
+}
+EXPORT_SYMBOL(drm_fb_helper_pan_display);
+
+int drm_fb_helper_single_fb_probe(struct drm_device *dev,
+				  int (*fb_create)(struct drm_device *dev,
+						   uint32_t fb_width,
+						   uint32_t fb_height,
+						   uint32_t surface_width,
+						   uint32_t surface_height,
+						   struct drm_framebuffer **fb_ptr))
+{
+	struct drm_crtc *crtc;
+	struct drm_connector *connector;
+	unsigned int fb_width = (unsigned)-1, fb_height = (unsigned)-1;
+	unsigned int surface_width = 0, surface_height = 0;
+	int new_fb = 0;
+	int crtc_count = 0;
+	int ret, i, conn_count = 0;
+	struct fb_info *info;
+	struct drm_framebuffer *fb;
+	struct drm_mode_set *modeset = NULL;
+	struct drm_fb_helper *fb_helper;
+
+	/* first up get a count of crtcs now in use and new min/maxes width/heights */
+	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+		if (drm_helper_crtc_in_use(crtc)) {
+			if (crtc->desired_mode) {
+				if (crtc->desired_mode->hdisplay < fb_width)
+					fb_width = crtc->desired_mode->hdisplay;
+
+				if (crtc->desired_mode->vdisplay < fb_height)
+					fb_height = crtc->desired_mode->vdisplay;
+
+				if (crtc->desired_mode->hdisplay > surface_width)
+					surface_width = crtc->desired_mode->hdisplay;
+
+				if (crtc->desired_mode->vdisplay > surface_height)
+					surface_height = crtc->desired_mode->vdisplay;
+			}
+			crtc_count++;
+		}
+	}
+
+	if (crtc_count == 0 || fb_width == -1 || fb_height == -1) {
+		/* hmm everyone went away - assume VGA cable just fell out
+		   and will come back later. */
+		return 0;
+	}
+
+	/* do we have an fb already? */
+	if (list_empty(&dev->mode_config.fb_kernel_list)) {
+		ret = (*fb_create)(dev, fb_width, fb_height, surface_width,
+				   surface_height, &fb);
+		if (ret)
+			return -EINVAL;
+		new_fb = 1;
+	} else {
+		fb = list_first_entry(&dev->mode_config.fb_kernel_list,
+				      struct drm_framebuffer, filp_head);
+
+		/* if someone hotplugs something bigger than we have already allocated, we are pwned.
+		   As really we can't resize an fbdev that is in the wild currently due to fbdev
+		   not really being designed for the lower layers moving stuff around under it.
+		   - so in the grand style of things - punt. */
+		if ((fb->width < surface_width) ||
+		    (fb->height < surface_height)) {
+			DRM_ERROR("Framebuffer not large enough to scale console onto.\n");
+			return -EINVAL;
+		}
+	}
+
+	info = fb->fbdev;
+	fb_helper = info->par;
+
+	crtc_count = 0;
+	/* okay we need to setup new connector sets in the crtcs */
+	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+		modeset = &fb_helper->crtc_info[crtc_count].mode_set;
+		modeset->fb = fb;
+		conn_count = 0;
+		list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+			if (connector->encoder)
+				if (connector->encoder->crtc == modeset->crtc) {
+					modeset->connectors[conn_count] = connector;
+					conn_count++;
+					if (conn_count > fb_helper->conn_limit)
+						BUG();
+				}
+		}
+
+		for (i = conn_count; i < fb_helper->conn_limit; i++)
+			modeset->connectors[i] = NULL;
+
+		modeset->crtc = crtc;
+		crtc_count++;
+
+		modeset->num_connectors = conn_count;
+		if (modeset->crtc->desired_mode) {
+			if (modeset->mode)
+				drm_mode_destroy(dev, modeset->mode);
+			modeset->mode = drm_mode_duplicate(dev,
+							   modeset->crtc->desired_mode);
+		}
+	}
+	fb_helper->crtc_count = crtc_count;
+	fb_helper->fb = fb;
+
+	if (new_fb) {
+		info->var.pixclock = -1;
+		if (register_framebuffer(info) < 0)
+			return -EINVAL;
+	} else {
+		drm_fb_helper_set_par(info);
+	}
+	printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
+	       info->fix.id);
+
+	/* Switch back to kernel console on panic */
+	/* multi card linked list maybe */
+	if (list_empty(&kernel_fb_helper_list)) {
+		printk(KERN_INFO "registered panic notifier\n");
+		atomic_notifier_chain_register(&panic_notifier_list,
+					       &paniced);
+		register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op);
+	}
+	list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list);
+	return 0;
+}
+EXPORT_SYMBOL(drm_fb_helper_single_fb_probe);
+
+void drm_fb_helper_free(struct drm_fb_helper *helper)
+{
+	list_del(&helper->kernel_fb_list);
+	if (list_empty(&kernel_fb_helper_list)) {
+		printk(KERN_INFO "unregistered panic notifier\n");
+		atomic_notifier_chain_unregister(&panic_notifier_list,
+						 &paniced);
+		unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op);
+	}
+	drm_fb_helper_crtc_free(helper);
+}
+EXPORT_SYMBOL(drm_fb_helper_free);
+
+void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch)
+{
+	info->fix.type = FB_TYPE_PACKED_PIXELS;
+	info->fix.visual = FB_VISUAL_TRUECOLOR;
+	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_I830;
+	info->fix.type_aux = 0;
+
+	info->fix.line_length = pitch;
+	return;
+}
+EXPORT_SYMBOL(drm_fb_helper_fill_fix);
+
+void drm_fb_helper_fill_var(struct fb_info *info, struct drm_framebuffer *fb,
+			    uint32_t fb_width, uint32_t fb_height)
+{
+	info->pseudo_palette = fb->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.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;
+}
+EXPORT_SYMBOL(drm_fb_helper_fill_var);

drivers/gpu/drm/i915/i915_dma.c

@@ -29,6 +29,7 @@
 #include "drmP.h"
 #include "drm.h"
 #include "drm_crtc_helper.h"
+#include "drm_fb_helper.h"
 #include "intel_drv.h"
 #include "i915_drm.h"
 #include "i915_drv.h"
@@ -1347,7 +1348,7 @@ void i915_driver_lastclose(struct drm_device * dev)
 	drm_i915_private_t *dev_priv = dev->dev_private;
 
 	if (!dev_priv || drm_core_check_feature(dev, DRIVER_MODESET)) {
-		intelfb_restore();
+		drm_fb_helper_restore();
 		return;
 	}
 

drivers/gpu/drm/i915/intel_display.c

@@ -3060,8 +3060,6 @@ static void intel_crtc_destroy(struct drm_crtc *crtc)
 {
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 
-	if (intel_crtc->mode_set.mode)
-		drm_mode_destroy(crtc->dev, intel_crtc->mode_set.mode);
 	drm_crtc_cleanup(crtc);
 	kfree(intel_crtc);
 }
@@ -3107,16 +3105,6 @@ static void intel_crtc_init(struct drm_device *dev, int pipe)
 	intel_crtc->cursor_addr = 0;
 	intel_crtc->dpms_mode = DRM_MODE_DPMS_OFF;
 	drm_crtc_helper_add(&intel_crtc->base, &intel_helper_funcs);
-
-	intel_crtc->mode_set.crtc = &intel_crtc->base;
-	intel_crtc->mode_set.connectors = (struct drm_connector **)(intel_crtc + 1);
-	intel_crtc->mode_set.num_connectors = 0;
-
-	if (i915_fbpercrtc) {
-
-
-
-	}
 }
 
 int intel_get_pipe_from_crtc_id(struct drm_device *dev, void *data,

drivers/gpu/drm/i915/intel_drv.h

@@ -96,9 +96,6 @@ struct intel_crtc {
 	uint32_t cursor_addr;
 	u8 lut_r[256], lut_g[256], lut_b[256];
 	int dpms_mode;
-	struct intel_framebuffer *fbdev_fb;
-	/* a mode_set for fbdev users on this crtc */
-	struct drm_mode_set mode_set;
 };
 
 #define to_intel_crtc(x) container_of(x, struct intel_crtc, base)

drivers/gpu/drm/radeon/radeon_display.c

@@ -158,9 +158,6 @@ static void radeon_crtc_destroy(struct drm_crtc *crtc)
 {
 	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
 
-	if (radeon_crtc->mode_set.mode) {
-		drm_mode_destroy(crtc->dev, radeon_crtc->mode_set.mode);
-	}
 	drm_crtc_cleanup(crtc);
 	kfree(radeon_crtc);
 }
@@ -189,9 +186,11 @@ static void radeon_crtc_init(struct drm_device *dev, int index)
 	radeon_crtc->crtc_id = index;
 	rdev->mode_info.crtcs[index] = radeon_crtc;
 
+#if 0
 	radeon_crtc->mode_set.crtc = &radeon_crtc->base;
 	radeon_crtc->mode_set.connectors = (struct drm_connector **)(radeon_crtc + 1);
 	radeon_crtc->mode_set.num_connectors = 0;
+#endif
 
 	for (i = 0; i < 256; i++) {
 		radeon_crtc->lut_r[i] = i << 2;

drivers/gpu/drm/radeon/radeon_fb.c

@@ -28,15 +28,7 @@
      */
 
 #include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/string.h>
-#include <linux/mm.h>
-#include <linux/tty.h>
-#include <linux/slab.h>
-#include <linux/delay.h>
 #include <linux/fb.h>
-#include <linux/init.h>
 
 #include "drmP.h"
 #include "drm.h"
@@ -45,93 +37,26 @@
 #include "radeon_drm.h"
 #include "radeon.h"
 
+#include "drm_fb_helper.h"
+
 struct radeon_fb_device {
-	struct radeon_device		*rdev;
-	struct drm_display_mode		*mode;
+	struct drm_fb_helper helper;
 	struct radeon_framebuffer	*rfb;
-	int				crtc_count;
-	/* crtc currently bound to this */
-	uint32_t			crtc_ids[2];
+	struct radeon_device		*rdev;
 };
 
-static int radeonfb_setcolreg(unsigned regno,
-			      unsigned red,
-			      unsigned green,
-			      unsigned blue,
-			      unsigned transp,
+static int radeon_fb_check_var(struct fb_var_screeninfo *var,
 			       struct fb_info *info)
 {
-	struct radeon_fb_device *rfbdev = info->par;
-	struct drm_device *dev = rfbdev->rdev->ddev;
-	struct drm_crtc *crtc;
-	int i;
-
-	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
-		struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
-		struct drm_mode_set *modeset = &radeon_crtc->mode_set;
-		struct drm_framebuffer *fb = modeset->fb;
-
-		for (i = 0; i < rfbdev->crtc_count; i++) {
-			if (crtc->base.id == rfbdev->crtc_ids[i]) {
-				break;
-			}
-		}
-		if (i == rfbdev->crtc_count) {
-			continue;
-		}
-		if (regno > 255) {
-			return 1;
-		}
-		if (fb->depth == 8) {
-			radeon_crtc_fb_gamma_set(crtc, red, green, blue, regno);
-			return 0;
-		}
-
-		if (regno < 16) {
-			switch (fb->depth) {
-			case 15:
-				fb->pseudo_palette[regno] = ((red & 0xf800) >> 1) |
-					((green & 0xf800) >>  6) |
-					((blue & 0xf800) >> 11);
-				break;
-			case 16:
-				fb->pseudo_palette[regno] = (red & 0xf800) |
-					((green & 0xfc00) >>  5) |
-					((blue  & 0xf800) >> 11);
-				break;
-			case 24:
-			case 32:
-				fb->pseudo_palette[regno] =
-					(((red >> 8) & 0xff) << info->var.red.offset) |
-					(((green >> 8) & 0xff) << info->var.green.offset) |
-					(((blue >> 8) & 0xff) << info->var.blue.offset);
-				break;
-			}
-		}
-	}
-	return 0;
-}
+	int ret;
+	ret = drm_fb_helper_check_var(var, info);
+	if (ret)
+		return ret;
 
-static int radeonfb_check_var(struct fb_var_screeninfo *var,
-			      struct fb_info *info)
-{
-	struct radeon_fb_device *rfbdev = info->par;
-	struct radeon_framebuffer *rfb = rfbdev->rfb;
-	struct drm_framebuffer *fb = &rfb->base;
+	/* big endian override for radeon endian workaround */
+#ifdef __BIG_ENDIAN
+	{
 		int depth;
-
-	if (var->pixclock == -1 || !var->pixclock) {
-		return -EINVAL;
-	}
-	/* Need to resize the fb object !!! */
-	if (var->xres > fb->width || var->yres > fb->height) {
-		DRM_ERROR("Requested width/height is greater than current fb "
-			   "object %dx%d > %dx%d\n", var->xres, var->yres,
-			   fb->width, fb->height);
-		DRM_ERROR("Need resizing code.\n");
-		return -EINVAL;
-	}
-
 		switch (var->bits_per_pixel) {
 		case 16:
 			depth = (var->green.length == 6) ? 16 : 15;
@@ -143,7 +68,6 @@ static int radeonfb_check_var(struct fb_var_screeninfo *var,
 			depth = var->bits_per_pixel;
 			break;
 		}
-
 		switch (depth) {
 		case 8:
 			var->red.offset = 0;
@@ -155,48 +79,6 @@ static int radeonfb_check_var(struct fb_var_screeninfo *var,
 			var->transp.length = 0;
 			var->transp.offset = 0;
 			break;
-#ifdef __LITTLE_ENDIAN
-	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;
-#else
 		case 24:
 			var->red.offset = 8;
 			var->green.offset = 16;
@@ -217,203 +99,24 @@ static int radeonfb_check_var(struct fb_var_screeninfo *var,
 			var->transp.length = 8;
 			var->transp.offset = 0;
 			break;
-#endif
 		default:
 			return -EINVAL;
 		}
-	return 0;
-}
-
-/* this will let fbcon do the mode init */
-static int radeonfb_set_par(struct fb_info *info)
-{
-	struct radeon_fb_device *rfbdev = info->par;
-	struct drm_device *dev = rfbdev->rdev->ddev;
-	struct fb_var_screeninfo *var = &info->var;
-	struct drm_crtc *crtc;
-	int ret;
-	int i;
-
-	if (var->pixclock != -1) {
-		DRM_ERROR("PIXEL CLCOK SET\n");
-		return -EINVAL;
-	}
-
-	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
-		struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
-
-		for (i = 0; i < rfbdev->crtc_count; i++) {
-			if (crtc->base.id == rfbdev->crtc_ids[i]) {
-				break;
-			}
-		}
-		if (i == rfbdev->crtc_count) {
-			continue;
-		}
-		if (crtc->fb == radeon_crtc->mode_set.fb) {
-			mutex_lock(&dev->mode_config.mutex);
-			ret = crtc->funcs->set_config(&radeon_crtc->mode_set);
-			mutex_unlock(&dev->mode_config.mutex);
-			if (ret) {
-				return ret;
-			}
-		}
-	}
-	return 0;
-}
-
-static int radeonfb_pan_display(struct fb_var_screeninfo *var,
-				struct fb_info *info)
-{
-	struct radeon_fb_device *rfbdev = info->par;
-	struct drm_device *dev = rfbdev->rdev->ddev;
-	struct drm_mode_set *modeset;
-	struct drm_crtc *crtc;
-	struct radeon_crtc *radeon_crtc;
-	int ret = 0;
-	int i;
-
-	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
-		for (i = 0; i < rfbdev->crtc_count; i++) {
-			if (crtc->base.id == rfbdev->crtc_ids[i]) {
-				break;
-			}
-		}
-
-		if (i == rfbdev->crtc_count) {
-			continue;
-		}
-
-		radeon_crtc = to_radeon_crtc(crtc);
-		modeset = &radeon_crtc->mode_set;
-
-		modeset->x = var->xoffset;
-		modeset->y = var->yoffset;
-
-		if (modeset->num_connectors) {
-			mutex_lock(&dev->mode_config.mutex);
-			ret = crtc->funcs->set_config(modeset);
-			mutex_unlock(&dev->mode_config.mutex);
-			if (!ret) {
-				info->var.xoffset = var->xoffset;
-				info->var.yoffset = var->yoffset;
-			}
-		}
-	}
-	return ret;
-}
-
-static void radeonfb_on(struct fb_info *info)
-{
-	struct radeon_fb_device *rfbdev = info->par;
-	struct drm_device *dev = rfbdev->rdev->ddev;
-	struct drm_crtc *crtc;
-	struct drm_encoder *encoder;
-	int i;
-
-	/*
-	 * For each CRTC in this fb, find all associated encoders
-	 * and turn them off, then turn off the CRTC.
-	 */
-	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
-		struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
-
-		for (i = 0; i < rfbdev->crtc_count; i++) {
-			if (crtc->base.id == rfbdev->crtc_ids[i]) {
-				break;
-			}
-		}
-
-		mutex_lock(&dev->mode_config.mutex);
-		crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
-		mutex_unlock(&dev->mode_config.mutex);
-
-		/* Found a CRTC on this fb, now find encoders */
-		list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
-			if (encoder->crtc == crtc) {
-				struct drm_encoder_helper_funcs *encoder_funcs;
-
-				encoder_funcs = encoder->helper_private;
-				mutex_lock(&dev->mode_config.mutex);
-				encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
-				mutex_unlock(&dev->mode_config.mutex);
-			}
-		}
-	}
-}
-
-static void radeonfb_off(struct fb_info *info, int dpms_mode)
-{
-	struct radeon_fb_device *rfbdev = info->par;
-	struct drm_device *dev = rfbdev->rdev->ddev;
-	struct drm_crtc *crtc;
-	struct drm_encoder *encoder;
-	int i;
-
-	/*
-	 * For each CRTC in this fb, find all associated encoders
-	 * and turn them off, then turn off the CRTC.
-	 */
-	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
-		struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
-
-		for (i = 0; i < rfbdev->crtc_count; i++) {
-			if (crtc->base.id == rfbdev->crtc_ids[i]) {
-				break;
-			}
-		}
-
-		/* Found a CRTC on this fb, now find encoders */
-		list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
-			if (encoder->crtc == crtc) {
-				struct drm_encoder_helper_funcs *encoder_funcs;
-
-				encoder_funcs = encoder->helper_private;
-				mutex_lock(&dev->mode_config.mutex);
-				encoder_funcs->dpms(encoder, dpms_mode);
-				mutex_unlock(&dev->mode_config.mutex);
-			}
-		}
-		if (dpms_mode == DRM_MODE_DPMS_OFF) {
-			mutex_lock(&dev->mode_config.mutex);
-			crtc_funcs->dpms(crtc, dpms_mode);
-			mutex_unlock(&dev->mode_config.mutex);
-		}
-	}
-}
-
-int radeonfb_blank(int blank, struct fb_info *info)
-{
-	switch (blank) {
-	case FB_BLANK_UNBLANK:
-		radeonfb_on(info);
-		break;
-	case FB_BLANK_NORMAL:
-		radeonfb_off(info, DRM_MODE_DPMS_STANDBY);
-		break;
-	case FB_BLANK_HSYNC_SUSPEND:
-		radeonfb_off(info, DRM_MODE_DPMS_STANDBY);
-		break;
-	case FB_BLANK_VSYNC_SUSPEND:
-		radeonfb_off(info, DRM_MODE_DPMS_SUSPEND);
-		break;
-	case FB_BLANK_POWERDOWN:
-		radeonfb_off(info, DRM_MODE_DPMS_OFF);
-		break;
 	}
+#endif
 	return 0;
 }
 
 static struct fb_ops radeonfb_ops = {
 	.owner = THIS_MODULE,
-	.fb_check_var = radeonfb_check_var,
-	.fb_set_par = radeonfb_set_par,
-	.fb_setcolreg = radeonfb_setcolreg,
+	.fb_check_var = radeon_fb_check_var,
+	.fb_set_par = drm_fb_helper_set_par,
+	.fb_setcolreg = drm_fb_helper_setcolreg,
 	.fb_fillrect = cfb_fillrect,
 	.fb_copyarea = cfb_copyarea,
 	.fb_imageblit = cfb_imageblit,
-	.fb_pan_display = radeonfb_pan_display,
-	.fb_blank = radeonfb_blank,
+	.fb_pan_display = drm_fb_helper_pan_display,
+	.fb_blank = drm_fb_helper_blank,
 };
 
 /**
@@ -456,21 +159,6 @@ int radeonfb_resize(struct drm_device *dev, struct drm_crtc *crtc)
 }
 EXPORT_SYMBOL(radeonfb_resize);
 
-static struct drm_mode_set panic_mode;
-
-int radeonfb_panic(struct notifier_block *n, unsigned long ununsed,
-		  void *panic_str)
-{
-	DRM_ERROR("panic occurred, switching back to text console\n");
-	drm_crtc_helper_set_config(&panic_mode);
-	return 0;
-}
-EXPORT_SYMBOL(radeonfb_panic);
-
-static struct notifier_block paniced = {
-	.notifier_call = radeonfb_panic,
-};
-
 static int radeon_align_pitch(struct radeon_device *rdev, int width, int bpp, bool tiled)
 {
 	int aligned = width;
@@ -495,11 +183,16 @@ static int radeon_align_pitch(struct radeon_device *rdev, int width, int bpp, bo
 	return aligned;
 }
 
-int radeonfb_create(struct radeon_device *rdev,
+static struct drm_fb_helper_funcs radeon_fb_helper_funcs = {
+	.gamma_set = radeon_crtc_fb_gamma_set,
+};
+
+int radeonfb_create(struct drm_device *dev,
 		    uint32_t fb_width, uint32_t fb_height,
 		    uint32_t surface_width, uint32_t surface_height,
-		    struct radeon_framebuffer **rfb_p)
+		    struct drm_framebuffer **fb_p)
 {
+	struct radeon_device *rdev = dev->dev_private;
 	struct fb_info *info;
 	struct radeon_fb_device *rfbdev;
 	struct drm_framebuffer *fb = NULL;
@@ -554,8 +247,8 @@ int radeonfb_create(struct radeon_device *rdev,
 
 	list_add(&fb->filp_head, &rdev->ddev->mode_config.fb_kernel_list);
 
+	*fb_p = fb;
 	rfb = to_radeon_framebuffer(fb);
-	*rfb_p = rfb;
 	rdev->fbdev_rfb = rfb;
 	rdev->fbdev_robj = robj;
 
@@ -564,7 +257,14 @@ int radeonfb_create(struct radeon_device *rdev,
 		ret = -ENOMEM;
 		goto out_unref;
 	}
+
 	rfbdev = info->par;
+	rfbdev->helper.funcs = &radeon_fb_helper_funcs;
+	rfbdev->helper.dev = dev;
+	ret = drm_fb_helper_init_crtc_count(&rfbdev->helper, 2,
+					    RADEONFB_CONN_LIMIT);
+	if (ret)
+		goto out_unref;
 
 	if (fb_tiled)
 		radeon_object_check_tiling(robj, 0, 0);
@@ -577,33 +277,19 @@ int radeonfb_create(struct radeon_device *rdev,
 	memset_io(fbptr, 0, aligned_size);
 
 	strcpy(info->fix.id, "radeondrmfb");
-	info->fix.type = FB_TYPE_PACKED_PIXELS;
-	info->fix.visual = FB_VISUAL_TRUECOLOR;
-	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;
+
+	drm_fb_helper_fill_fix(info, fb->pitch);
+
 	info->flags = FBINFO_DEFAULT;
 	info->fbops = &radeonfb_ops;
-	info->fix.line_length = fb->pitch;
+
 	tmp = fb_gpuaddr - rdev->mc.vram_location;
 	info->fix.smem_start = rdev->mc.aper_base + tmp;
 	info->fix.smem_len = size;
 	info->screen_base = fbptr;
 	info->screen_size = size;
-	info->pseudo_palette = fb->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.xoffset = 0;
-	info->var.yoffset = 0;
-	info->var.activate = FB_ACTIVATE_NOW;
-	info->var.height = -1;
-	info->var.width = -1;
-	info->var.xres = fb_width;
-	info->var.yres = fb_height;
+
+	drm_fb_helper_fill_var(info, fb, fb_width, fb_height);
 
 	/* setup aperture base/size for vesafb takeover */
 	info->aperture_base = rdev->ddev->mode_config.fb_base;
@@ -626,6 +312,9 @@ int radeonfb_create(struct radeon_device *rdev,
 	DRM_INFO("fb depth is %d\n", fb->depth);
 	DRM_INFO("   pitch is %d\n", fb->pitch);
 
+#ifdef __BIG_ENDIAN
+	/* fill var sets defaults for this stuff - override
+	   on big endian */
 	switch (fb->depth) {
 	case 8:
 		info->var.red.offset = 0;
@@ -637,47 +326,6 @@ int radeonfb_create(struct radeon_device *rdev,
 		info->var.transp.offset = 0;
 		info->var.transp.length = 0;
 		break;
-#ifdef __LITTLE_ENDIAN
-	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;
-#else
 	case 24:
 		info->var.red.offset = 8;
 		info->var.green.offset = 16;
@@ -699,9 +347,9 @@ int radeonfb_create(struct radeon_device *rdev,
 		info->var.transp.length = 8;
 		break;
 	default:
-#endif
 		break;
 	}
+#endif
 
 	fb->fbdev = info;
 	rfbdev->rfb = rfb;
@@ -726,145 +374,10 @@ int radeonfb_create(struct radeon_device *rdev,
 	return ret;
 }
 
-static int radeonfb_single_fb_probe(struct radeon_device *rdev)
-{
-	struct drm_crtc *crtc;
-	struct drm_connector *connector;
-	unsigned int fb_width = (unsigned)-1, fb_height = (unsigned)-1;
-	unsigned int surface_width = 0, surface_height = 0;
-	int new_fb = 0;
-	int crtc_count = 0;
-	int ret, i, conn_count = 0;
-	struct radeon_framebuffer *rfb;
-	struct fb_info *info;
-	struct radeon_fb_device *rfbdev;
-	struct drm_mode_set *modeset = NULL;
-
-	/* first up get a count of crtcs now in use and new min/maxes width/heights */
-	list_for_each_entry(crtc, &rdev->ddev->mode_config.crtc_list, head) {
-		if (drm_helper_crtc_in_use(crtc)) {
-			if (crtc->desired_mode) {
-				if (crtc->desired_mode->hdisplay < fb_width)
-					fb_width = crtc->desired_mode->hdisplay;
-
-				if (crtc->desired_mode->vdisplay < fb_height)
-					fb_height = crtc->desired_mode->vdisplay;
-
-				if (crtc->desired_mode->hdisplay > surface_width)
-					surface_width = crtc->desired_mode->hdisplay;
-
-				if (crtc->desired_mode->vdisplay > surface_height)
-					surface_height = crtc->desired_mode->vdisplay;
-			}
-			crtc_count++;
-		}
-	}
-
-	if (crtc_count == 0 || fb_width == -1 || fb_height == -1) {
-		/* hmm everyone went away - assume VGA cable just fell out
-		   and will come back later. */
-		return 0;
-	}
-
-	/* do we have an fb already? */
-	if (list_empty(&rdev->ddev->mode_config.fb_kernel_list)) {
-		/* create an fb if we don't have one */
-		ret = radeonfb_create(rdev, fb_width, fb_height, surface_width, surface_height, &rfb);
-		if (ret) {
-			return -EINVAL;
-		}
-		new_fb = 1;
-	} else {
-		struct drm_framebuffer *fb;
-		fb = list_first_entry(&rdev->ddev->mode_config.fb_kernel_list, struct drm_framebuffer, filp_head);
-		rfb = to_radeon_framebuffer(fb);
-
-		/* if someone hotplugs something bigger than we have already allocated, we are pwned.
-		   As really we can't resize an fbdev that is in the wild currently due to fbdev
-		   not really being designed for the lower layers moving stuff around under it.
-		   - so in the grand style of things - punt. */
-		if ((fb->width < surface_width) || (fb->height < surface_height)) {
-			DRM_ERROR("Framebuffer not large enough to scale console onto.\n");
-			return -EINVAL;
-		}
-	}
-
-	info = rfb->base.fbdev;
-	rdev->fbdev_info = info;
-	rfbdev = info->par;
-
-	crtc_count = 0;
-	/* okay we need to setup new connector sets in the crtcs */
-	list_for_each_entry(crtc, &rdev->ddev->mode_config.crtc_list, head) {
-		struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
-		modeset = &radeon_crtc->mode_set;
-		modeset->fb = &rfb->base;
-		conn_count = 0;
-		list_for_each_entry(connector, &rdev->ddev->mode_config.connector_list, head) {
-			if (connector->encoder)
-				if (connector->encoder->crtc == modeset->crtc) {
-					modeset->connectors[conn_count] = connector;
-					conn_count++;
-					if (conn_count > RADEONFB_CONN_LIMIT)
-						BUG();
-				}
-		}
-
-		for (i = conn_count; i < RADEONFB_CONN_LIMIT; i++)
-			modeset->connectors[i] = NULL;
-
-
-		rfbdev->crtc_ids[crtc_count++] = crtc->base.id;
-
-		modeset->num_connectors = conn_count;
-		if (modeset->crtc->desired_mode) {
-			if (modeset->mode) {
-				drm_mode_destroy(rdev->ddev, modeset->mode);
-			}
-			modeset->mode = drm_mode_duplicate(rdev->ddev,
-							   modeset->crtc->desired_mode);
-		}
-	}
-	rfbdev->crtc_count = crtc_count;
-
-	if (new_fb) {
-		info->var.pixclock = -1;
-		if (register_framebuffer(info) < 0)
-			return -EINVAL;
-	} else {
-		radeonfb_set_par(info);
-	}
-	printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
-	       info->fix.id);
-
-	/* Switch back to kernel console on panic */
-	panic_mode = *modeset;
-	atomic_notifier_chain_register(&panic_notifier_list, &paniced);
-	printk(KERN_INFO "registered panic notifier\n");
-
-	return 0;
-}
-
 int radeonfb_probe(struct drm_device *dev)
 {
 	int ret;
-
-	/* something has changed in the lower levels of hell - deal with it
-	   here */
-
-	/* two modes : a) 1 fb to rule all crtcs.
-	               b) one fb per crtc.
-	   two actions 1) new connected device
-	               2) device removed.
-	   case a/1 : if the fb surface isn't big enough - resize the surface fb.
-	              if the fb size isn't big enough - resize fb into surface.
-		      if everything big enough configure the new crtc/etc.
-	   case a/2 : undo the configuration
-	              possibly resize down the fb to fit the new configuration.
-           case b/1 : see if it is on a new crtc - setup a new fb and add it.
-	   case b/2 : teardown the new fb.
-	*/
-	ret = radeonfb_single_fb_probe(dev->dev_private);
+	ret = drm_fb_helper_single_fb_probe(dev, &radeonfb_create);
 	return ret;
 }
 EXPORT_SYMBOL(radeonfb_probe);
@@ -880,16 +393,17 @@ int radeonfb_remove(struct drm_device *dev, struct drm_framebuffer *fb)
 	}
 	info = fb->fbdev;
 	if (info) {
+		struct radeon_fb_device *rfbdev = info->par;
 		robj = rfb->obj->driver_private;
 		unregister_framebuffer(info);
 		radeon_object_kunmap(robj);
 		radeon_object_unpin(robj);
+		drm_fb_helper_free(&rfbdev->helper);
 		framebuffer_release(info);
 	}
 
 	printk(KERN_INFO "unregistered panic notifier\n");
-	atomic_notifier_chain_unregister(&panic_notifier_list, &paniced);
-	memset(&panic_mode, 0, sizeof(struct drm_mode_set));
+
 	return 0;
 }
 EXPORT_SYMBOL(radeonfb_remove);

drivers/gpu/drm/radeon/radeon_mode.h

@@ -195,8 +195,6 @@ struct radeon_crtc {
 	bool enabled;
 	bool can_tile;
 	uint32_t crtc_offset;
-	struct radeon_framebuffer *fbdev_fb;
-	struct drm_mode_set mode_set;
 	struct drm_gem_object *cursor_bo;
 	uint64_t cursor_addr;
 	int cursor_width;

include/drm/drm_crtc.h

@@ -259,6 +259,8 @@ struct drm_framebuffer {
 	void *fbdev;
 	u32 pseudo_palette[17];
 	struct list_head filp_head;
+	/* if you are using the helper */
+	void *helper_private;
 };
 
 struct drm_property_blob {

include/drm/drm_fb_helper.h

+/*
+ * 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>
+ */
+#ifndef DRM_FB_HELPER_H
+#define DRM_FB_HELPER_H
+
+struct drm_fb_helper_crtc {
+	uint32_t crtc_id;
+	struct drm_mode_set mode_set;
+};
+
+struct drm_fb_helper_funcs {
+	void (*gamma_set)(struct drm_crtc *crtc, u16 red, u16 green,
+			  u16 blue, int regno);
+};
+
+struct drm_fb_helper {
+	struct drm_framebuffer *fb;
+	struct drm_device *dev;
+	struct drm_display_mode *mode;
+	int crtc_count;
+	struct drm_fb_helper_crtc *crtc_info;
+	struct drm_fb_helper_funcs *funcs;
+	int conn_limit;
+	struct list_head kernel_fb_list;
+};
+
+int drm_fb_helper_single_fb_probe(struct drm_device *dev,
+				  int (*fb_create)(struct drm_device *dev,
+						   uint32_t fb_width,
+						   uint32_t fb_height,
+						   uint32_t surface_width,
+						   uint32_t surface_height,
+						   struct drm_framebuffer **fb_ptr));
+int drm_fb_helper_init_crtc_count(struct drm_fb_helper *helper, int crtc_count,
+				  int max_conn);
+void drm_fb_helper_free(struct drm_fb_helper *helper);
+int drm_fb_helper_blank(int blank, struct fb_info *info);
+int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
+			      struct fb_info *info);
+int drm_fb_helper_set_par(struct fb_info *info);
+int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
+			    struct fb_info *info);
+int drm_fb_helper_setcolreg(unsigned regno,
+			    unsigned red,
+			    unsigned green,
+			    unsigned blue,
+			    unsigned transp,
+			    struct fb_info *info);
+
+void drm_fb_helper_restore(void);
+void drm_fb_helper_fill_var(struct fb_info *info, struct drm_framebuffer *fb,
+			    uint32_t fb_width, uint32_t fb_height);
+void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch);
+
+#endif