drivers/gpu/drm/radeon/radeon_fb.c - linux - Git at Google

 /*
  * 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 <linux/module.h>
 #include <linux/slab.h>
 #include <linux/pm_runtime.h>

 #include <drm/drmP.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_crtc_helper.h>
 #include <drm/radeon_drm.h>
 #include "radeon.h"

 #include <drm/drm_fb_helper.h>

 #include <linux/vga_switcheroo.h>

 /* object hierarchy -
  * this contains a helper + a radeon fb
  * the helper contains a pointer to radeon framebuffer baseclass.
  */
 struct radeon_fbdev {
 	struct drm_fb_helper helper;
 	struct radeon_framebuffer rfb;
 	struct radeon_device *rdev;
 };

 static int
 radeonfb_open(struct fb_info *info, int user)
 {
 	struct radeon_fbdev *rfbdev = info->par;
 	struct radeon_device *rdev = rfbdev->rdev;
 	int ret = pm_runtime_get_sync(rdev->ddev->dev);
 	if (ret < 0 && ret != -EACCES) {
 		pm_runtime_mark_last_busy(rdev->ddev->dev);
 		pm_runtime_put_autosuspend(rdev->ddev->dev);
 		return ret;
 	}
 	return 0;
 }

 static int
 radeonfb_release(struct fb_info *info, int user)
 {
 	struct radeon_fbdev *rfbdev = info->par;
 	struct radeon_device *rdev = rfbdev->rdev;

 	pm_runtime_mark_last_busy(rdev->ddev->dev);
 	pm_runtime_put_autosuspend(rdev->ddev->dev);
 	return 0;
 }

 static struct fb_ops radeonfb_ops = {
 	.owner = THIS_MODULE,
 	DRM_FB_HELPER_DEFAULT_OPS,
 	.fb_open = radeonfb_open,
 	.fb_release = radeonfb_release,
 	.fb_fillrect = drm_fb_helper_cfb_fillrect,
 	.fb_copyarea = drm_fb_helper_cfb_copyarea,
 	.fb_imageblit = drm_fb_helper_cfb_imageblit,
 };


 int radeon_align_pitch(struct radeon_device *rdev, int width, int cpp, bool tiled)
 {
 	int aligned = width;
 	int align_large = (ASIC_IS_AVIVO(rdev)) || tiled;
 	int pitch_mask = 0;

 	switch (cpp) {
 	case 1:
 		pitch_mask = align_large ? 255 : 127;
 		break;
 	case 2:
 		pitch_mask = align_large ? 127 : 31;
 		break;
 	case 3:
 	case 4:
 		pitch_mask = align_large ? 63 : 15;
 		break;
 	}

 	aligned += pitch_mask;
 	aligned &= ~pitch_mask;
 	return aligned * cpp;
 }

 static void radeonfb_destroy_pinned_object(struct drm_gem_object *gobj)
 {
 	struct radeon_bo *rbo = gem_to_radeon_bo(gobj);
 	int ret;

 	ret = radeon_bo_reserve(rbo, false);
 	if (likely(ret == 0)) {
 		radeon_bo_kunmap(rbo);
 		radeon_bo_unpin(rbo);
 		radeon_bo_unreserve(rbo);
 	}
 	drm_gem_object_unreference_unlocked(gobj);
 }

 static int radeonfb_create_pinned_object(struct radeon_fbdev *rfbdev,
 					 struct drm_mode_fb_cmd2 *mode_cmd,
 					 struct drm_gem_object **gobj_p)
 {
 	struct radeon_device *rdev = rfbdev->rdev;
 	struct drm_gem_object *gobj = NULL;
 	struct radeon_bo *rbo = NULL;
 	bool fb_tiled = false; /* useful for testing */
 	u32 tiling_flags = 0;
 	int ret;
 	int aligned_size, size;
 	int height = mode_cmd->height;
 	u32 cpp;

 	cpp = drm_format_plane_cpp(mode_cmd->pixel_format, 0);

 	/* need to align pitch with crtc limits */
 	mode_cmd->pitches[0] = radeon_align_pitch(rdev, mode_cmd->width, cpp,
 						  fb_tiled);

 	if (rdev->family >= CHIP_R600)
 		height = ALIGN(mode_cmd->height, 8);
 	size = mode_cmd->pitches[0] * height;
 	aligned_size = ALIGN(size, PAGE_SIZE);
 	ret = radeon_gem_object_create(rdev, aligned_size, 0,
 				       RADEON_GEM_DOMAIN_VRAM,
 				       0, true, &gobj);
 	if (ret) {
 		printk(KERN_ERR "failed to allocate framebuffer (%d)\n",
 		       aligned_size);
 		return -ENOMEM;
 	}
 	rbo = gem_to_radeon_bo(gobj);

 	if (fb_tiled)
 		tiling_flags = RADEON_TILING_MACRO;

 #ifdef __BIG_ENDIAN
 	switch (cpp) {
 	case 4:
 		tiling_flags |= RADEON_TILING_SWAP_32BIT;
 		break;
 	case 2:
 		tiling_flags |= RADEON_TILING_SWAP_16BIT;
 	default:
 		break;
 	}
 #endif

 	if (tiling_flags) {
 		ret = radeon_bo_set_tiling_flags(rbo,
 						 tiling_flags | RADEON_TILING_SURFACE,
 						 mode_cmd->pitches[0]);
 		if (ret)
 			dev_err(rdev->dev, "FB failed to set tiling flags\n");
 	}


 	ret = radeon_bo_reserve(rbo, false);
 	if (unlikely(ret != 0))
 		goto out_unref;
 	/* Only 27 bit offset for legacy CRTC */
 	ret = radeon_bo_pin_restricted(rbo, RADEON_GEM_DOMAIN_VRAM,
 				       ASIC_IS_AVIVO(rdev) ? 0 : 1 << 27,
 				       NULL);
 	if (ret) {
 		radeon_bo_unreserve(rbo);
 		goto out_unref;
 	}
 	if (fb_tiled)
 		radeon_bo_check_tiling(rbo, 0, 0);
 	ret = radeon_bo_kmap(rbo, NULL);
 	radeon_bo_unreserve(rbo);
 	if (ret) {
 		goto out_unref;
 	}

 	*gobj_p = gobj;
 	return 0;
 out_unref:
 	radeonfb_destroy_pinned_object(gobj);
 	*gobj_p = NULL;
 	return ret;
 }

 static int radeonfb_create(struct drm_fb_helper *helper,
 			   struct drm_fb_helper_surface_size *sizes)
 {
 	struct radeon_fbdev *rfbdev =
 		container_of(helper, struct radeon_fbdev, helper);
 	struct radeon_device *rdev = rfbdev->rdev;
 	struct fb_info *info;
 	struct drm_framebuffer *fb = NULL;
 	struct drm_mode_fb_cmd2 mode_cmd;
 	struct drm_gem_object *gobj = NULL;
 	struct radeon_bo *rbo = NULL;
 	int ret;
 	unsigned long tmp;

 	mode_cmd.width = sizes->surface_width;
 	mode_cmd.height = sizes->surface_height;

 	/* avivo can't scanout real 24bpp */
 	if ((sizes->surface_bpp == 24) && ASIC_IS_AVIVO(rdev))
 		sizes->surface_bpp = 32;

 	mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 							  sizes->surface_depth);

 	ret = radeonfb_create_pinned_object(rfbdev, &mode_cmd, &gobj);
 	if (ret) {
 		DRM_ERROR("failed to create fbcon object %d\n", ret);
 		return ret;
 	}

 	rbo = gem_to_radeon_bo(gobj);

 	/* okay we have an object now allocate the framebuffer */
 	info = drm_fb_helper_alloc_fbi(helper);
 	if (IS_ERR(info)) {
 		ret = PTR_ERR(info);
 		goto out_unref;
 	}

 	info->par = rfbdev;
 	info->skip_vt_switch = true;

 	ret = radeon_framebuffer_init(rdev->ddev, &rfbdev->rfb, &mode_cmd, gobj);
 	if (ret) {
 		DRM_ERROR("failed to initialize framebuffer %d\n", ret);
 		goto out_destroy_fbi;
 	}

 	fb = &rfbdev->rfb.base;

 	/* setup helper */
 	rfbdev->helper.fb = fb;

 	memset_io(rbo->kptr, 0x0, radeon_bo_size(rbo));

 	strcpy(info->fix.id, "radeondrmfb");

 	drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth);

 	info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
 	info->fbops = &radeonfb_ops;

 	tmp = radeon_bo_gpu_offset(rbo) - rdev->mc.vram_start;
 	info->fix.smem_start = rdev->mc.aper_base + tmp;
 	info->fix.smem_len = radeon_bo_size(rbo);
 	info->screen_base = rbo->kptr;
 	info->screen_size = radeon_bo_size(rbo);

 	drm_fb_helper_fill_var(info, &rfbdev->helper, sizes->fb_width, sizes->fb_height);

 	/* setup aperture base/size for vesafb takeover */
 	info->apertures->ranges[0].base = rdev->ddev->mode_config.fb_base;
 	info->apertures->ranges[0].size = rdev->mc.aper_size;

 	/* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */

 	if (info->screen_base == NULL) {
 		ret = -ENOSPC;
 		goto out_destroy_fbi;
 	}

 	DRM_INFO("fb mappable at 0x%lX\n",  info->fix.smem_start);
 	DRM_INFO("vram apper at 0x%lX\n",  (unsigned long)rdev->mc.aper_base);
 	DRM_INFO("size %lu\n", (unsigned long)radeon_bo_size(rbo));
 	DRM_INFO("fb depth is %d\n", fb->format->depth);
 	DRM_INFO("   pitch is %d\n", fb->pitches[0]);

 	vga_switcheroo_client_fb_set(rdev->ddev->pdev, info);
 	return 0;

 out_destroy_fbi:
 	drm_fb_helper_release_fbi(helper);
 out_unref:
 	if (rbo) {

 	}
 	if (fb && ret) {
 		drm_gem_object_unreference_unlocked(gobj);
 		drm_framebuffer_unregister_private(fb);
 		drm_framebuffer_cleanup(fb);
 		kfree(fb);
 	}
 	return ret;
 }

 void radeon_fb_output_poll_changed(struct radeon_device *rdev)
 {
 	if (rdev->mode_info.rfbdev)
 		drm_fb_helper_hotplug_event(&rdev->mode_info.rfbdev->helper);
 }

 static int radeon_fbdev_destroy(struct drm_device *dev, struct radeon_fbdev *rfbdev)
 {
 	struct radeon_framebuffer *rfb = &rfbdev->rfb;

 	drm_fb_helper_unregister_fbi(&rfbdev->helper);
 	drm_fb_helper_release_fbi(&rfbdev->helper);

 	if (rfb->obj) {
 		radeonfb_destroy_pinned_object(rfb->obj);
 		rfb->obj = NULL;
 	}
 	drm_fb_helper_fini(&rfbdev->helper);
 	drm_framebuffer_unregister_private(&rfb->base);
 	drm_framebuffer_cleanup(&rfb->base);

 	return 0;
 }

 static const struct drm_fb_helper_funcs radeon_fb_helper_funcs = {
 	.gamma_set = radeon_crtc_fb_gamma_set,
 	.gamma_get = radeon_crtc_fb_gamma_get,
 	.fb_probe = radeonfb_create,
 };

 int radeon_fbdev_init(struct radeon_device *rdev)
 {
 	struct radeon_fbdev *rfbdev;
 	int bpp_sel = 32;
 	int ret;

 	/* don't enable fbdev if no connectors */
 	if (list_empty(&rdev->ddev->mode_config.connector_list))
 		return 0;

 	/* select 8 bpp console on RN50 or 16MB cards */
 	if (ASIC_IS_RN50(rdev) || rdev->mc.real_vram_size <= (32*1024*1024))
 		bpp_sel = 8;

 	rfbdev = kzalloc(sizeof(struct radeon_fbdev), GFP_KERNEL);
 	if (!rfbdev)
 		return -ENOMEM;

 	rfbdev->rdev = rdev;
 	rdev->mode_info.rfbdev = rfbdev;

 	drm_fb_helper_prepare(rdev->ddev, &rfbdev->helper,
 			      &radeon_fb_helper_funcs);

 	ret = drm_fb_helper_init(rdev->ddev, &rfbdev->helper,
 				 RADEONFB_CONN_LIMIT);
 	if (ret)
 		goto free;

 	ret = drm_fb_helper_single_add_all_connectors(&rfbdev->helper);
 	if (ret)
 		goto fini;

 	/* disable all the possible outputs/crtcs before entering KMS mode */
 	drm_helper_disable_unused_functions(rdev->ddev);

 	ret = drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
 	if (ret)
 		goto fini;

 	return 0;

 fini:
 	drm_fb_helper_fini(&rfbdev->helper);
 free:
 	kfree(rfbdev);
 	return ret;
 }

 void radeon_fbdev_fini(struct radeon_device *rdev)
 {
 	if (!rdev->mode_info.rfbdev)
 		return;

 	radeon_fbdev_destroy(rdev->ddev, rdev->mode_info.rfbdev);
 	kfree(rdev->mode_info.rfbdev);
 	rdev->mode_info.rfbdev = NULL;
 }

 void radeon_fbdev_set_suspend(struct radeon_device *rdev, int state)
 {
 	if (rdev->mode_info.rfbdev)
 		drm_fb_helper_set_suspend(&rdev->mode_info.rfbdev->helper, state);
 }

 bool radeon_fbdev_robj_is_fb(struct radeon_device *rdev, struct radeon_bo *robj)
 {
 	if (!rdev->mode_info.rfbdev)
 		return false;

 	if (robj == gem_to_radeon_bo(rdev->mode_info.rfbdev->rfb.obj))
 		return true;
 	return false;
 }

 void radeon_fb_add_connector(struct radeon_device *rdev, struct drm_connector *connector)
 {
 	if (rdev->mode_info.rfbdev)
 		drm_fb_helper_add_one_connector(&rdev->mode_info.rfbdev->helper, connector);
 }

 void radeon_fb_remove_connector(struct radeon_device *rdev, struct drm_connector *connector)
 {
 	if (rdev->mode_info.rfbdev)
 		drm_fb_helper_remove_one_connector(&rdev->mode_info.rfbdev->helper, connector);
 }

 void radeon_fbdev_restore_mode(struct radeon_device *rdev)
 {
 	struct radeon_fbdev *rfbdev = rdev->mode_info.rfbdev;
 	struct drm_fb_helper *fb_helper;
 	int ret;

 	if (!rfbdev)
 		return;

 	fb_helper = &rfbdev->helper;

 	ret = drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper);
 	if (ret)
 		DRM_DEBUG("failed to restore crtc mode\n");
 }
	/*
	* 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 <linux/module.h>
	#include <linux/slab.h>
	#include <linux/pm_runtime.h>

	#include <drm/drmP.h>
	#include <drm/drm_crtc.h>
	#include <drm/drm_crtc_helper.h>
	#include <drm/radeon_drm.h>
	#include "radeon.h"

	#include <drm/drm_fb_helper.h>

	#include <linux/vga_switcheroo.h>

	/* object hierarchy -
	* this contains a helper + a radeon fb
	* the helper contains a pointer to radeon framebuffer baseclass.
	*/
	struct radeon_fbdev {
	struct drm_fb_helper helper;
	struct radeon_framebuffer rfb;
	struct radeon_device *rdev;
	};

	static int
	radeonfb_open(struct fb_info *info, int user)
	{
	struct radeon_fbdev *rfbdev = info->par;
	struct radeon_device *rdev = rfbdev->rdev;
	int ret = pm_runtime_get_sync(rdev->ddev->dev);
	if (ret < 0 && ret != -EACCES) {
	pm_runtime_mark_last_busy(rdev->ddev->dev);
	pm_runtime_put_autosuspend(rdev->ddev->dev);
	return ret;
	}
	return 0;
	}

	static int
	radeonfb_release(struct fb_info *info, int user)
	{
	struct radeon_fbdev *rfbdev = info->par;
	struct radeon_device *rdev = rfbdev->rdev;

	pm_runtime_mark_last_busy(rdev->ddev->dev);
	pm_runtime_put_autosuspend(rdev->ddev->dev);
	return 0;
	}

	static struct fb_ops radeonfb_ops = {
	.owner = THIS_MODULE,
	DRM_FB_HELPER_DEFAULT_OPS,
	.fb_open = radeonfb_open,
	.fb_release = radeonfb_release,
	.fb_fillrect = drm_fb_helper_cfb_fillrect,
	.fb_copyarea = drm_fb_helper_cfb_copyarea,
	.fb_imageblit = drm_fb_helper_cfb_imageblit,
	};


	int radeon_align_pitch(struct radeon_device *rdev, int width, int cpp, bool tiled)
	{
	int aligned = width;
	int align_large = (ASIC_IS_AVIVO(rdev)) \|\| tiled;
	int pitch_mask = 0;

	switch (cpp) {
	case 1:
	pitch_mask = align_large ? 255 : 127;
	break;
	case 2:
	pitch_mask = align_large ? 127 : 31;
	break;
	case 3:
	case 4:
	pitch_mask = align_large ? 63 : 15;
	break;
	}

	aligned += pitch_mask;
	aligned &= ~pitch_mask;
	return aligned * cpp;
	}

	static void radeonfb_destroy_pinned_object(struct drm_gem_object *gobj)
	{
	struct radeon_bo *rbo = gem_to_radeon_bo(gobj);
	int ret;

	ret = radeon_bo_reserve(rbo, false);
	if (likely(ret == 0)) {
	radeon_bo_kunmap(rbo);
	radeon_bo_unpin(rbo);
	radeon_bo_unreserve(rbo);
	}
	drm_gem_object_unreference_unlocked(gobj);
	}

	static int radeonfb_create_pinned_object(struct radeon_fbdev *rfbdev,
	struct drm_mode_fb_cmd2 *mode_cmd,
	struct drm_gem_object **gobj_p)
	{
	struct radeon_device *rdev = rfbdev->rdev;
	struct drm_gem_object *gobj = NULL;
	struct radeon_bo *rbo = NULL;
	bool fb_tiled = false; /* useful for testing */
	u32 tiling_flags = 0;
	int ret;
	int aligned_size, size;
	int height = mode_cmd->height;
	u32 cpp;

	cpp = drm_format_plane_cpp(mode_cmd->pixel_format, 0);

	/* need to align pitch with crtc limits */
	mode_cmd->pitches[0] = radeon_align_pitch(rdev, mode_cmd->width, cpp,
	fb_tiled);

	if (rdev->family >= CHIP_R600)
	height = ALIGN(mode_cmd->height, 8);
	size = mode_cmd->pitches[0] * height;
	aligned_size = ALIGN(size, PAGE_SIZE);
	ret = radeon_gem_object_create(rdev, aligned_size, 0,
	RADEON_GEM_DOMAIN_VRAM,
	0, true, &gobj);
	if (ret) {
	printk(KERN_ERR "failed to allocate framebuffer (%d)\n",
	aligned_size);
	return -ENOMEM;
	}
	rbo = gem_to_radeon_bo(gobj);

	if (fb_tiled)
	tiling_flags = RADEON_TILING_MACRO;

	#ifdef __BIG_ENDIAN
	switch (cpp) {
	case 4:
	tiling_flags \|= RADEON_TILING_SWAP_32BIT;
	break;
	case 2:
	tiling_flags \|= RADEON_TILING_SWAP_16BIT;
	default:
	break;
	}
	#endif

	if (tiling_flags) {
	ret = radeon_bo_set_tiling_flags(rbo,
	tiling_flags \| RADEON_TILING_SURFACE,
	mode_cmd->pitches[0]);
	if (ret)
	dev_err(rdev->dev, "FB failed to set tiling flags\n");
	}


	ret = radeon_bo_reserve(rbo, false);
	if (unlikely(ret != 0))
	goto out_unref;
	/* Only 27 bit offset for legacy CRTC */
	ret = radeon_bo_pin_restricted(rbo, RADEON_GEM_DOMAIN_VRAM,
	ASIC_IS_AVIVO(rdev) ? 0 : 1 << 27,
	NULL);
	if (ret) {
	radeon_bo_unreserve(rbo);
	goto out_unref;
	}
	if (fb_tiled)
	radeon_bo_check_tiling(rbo, 0, 0);
	ret = radeon_bo_kmap(rbo, NULL);
	radeon_bo_unreserve(rbo);
	if (ret) {
	goto out_unref;
	}

	*gobj_p = gobj;
	return 0;
	out_unref:
	radeonfb_destroy_pinned_object(gobj);
	*gobj_p = NULL;
	return ret;
	}

	static int radeonfb_create(struct drm_fb_helper *helper,
	struct drm_fb_helper_surface_size *sizes)
	{
	struct radeon_fbdev *rfbdev =
	container_of(helper, struct radeon_fbdev, helper);
	struct radeon_device *rdev = rfbdev->rdev;
	struct fb_info *info;
	struct drm_framebuffer *fb = NULL;
	struct drm_mode_fb_cmd2 mode_cmd;
	struct drm_gem_object *gobj = NULL;
	struct radeon_bo *rbo = NULL;
	int ret;
	unsigned long tmp;

	mode_cmd.width = sizes->surface_width;
	mode_cmd.height = sizes->surface_height;

	/* avivo can't scanout real 24bpp */
	if ((sizes->surface_bpp == 24) && ASIC_IS_AVIVO(rdev))
	sizes->surface_bpp = 32;

	mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
	sizes->surface_depth);

	ret = radeonfb_create_pinned_object(rfbdev, &mode_cmd, &gobj);
	if (ret) {
	DRM_ERROR("failed to create fbcon object %d\n", ret);
	return ret;
	}

	rbo = gem_to_radeon_bo(gobj);

	/* okay we have an object now allocate the framebuffer */
	info = drm_fb_helper_alloc_fbi(helper);
	if (IS_ERR(info)) {
	ret = PTR_ERR(info);
	goto out_unref;
	}

	info->par = rfbdev;
	info->skip_vt_switch = true;

	ret = radeon_framebuffer_init(rdev->ddev, &rfbdev->rfb, &mode_cmd, gobj);
	if (ret) {
	DRM_ERROR("failed to initialize framebuffer %d\n", ret);
	goto out_destroy_fbi;
	}

	fb = &rfbdev->rfb.base;

	/* setup helper */
	rfbdev->helper.fb = fb;

	memset_io(rbo->kptr, 0x0, radeon_bo_size(rbo));

	strcpy(info->fix.id, "radeondrmfb");

	drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth);

	info->flags = FBINFO_DEFAULT \| FBINFO_CAN_FORCE_OUTPUT;
	info->fbops = &radeonfb_ops;

	tmp = radeon_bo_gpu_offset(rbo) - rdev->mc.vram_start;
	info->fix.smem_start = rdev->mc.aper_base + tmp;
	info->fix.smem_len = radeon_bo_size(rbo);
	info->screen_base = rbo->kptr;
	info->screen_size = radeon_bo_size(rbo);

	drm_fb_helper_fill_var(info, &rfbdev->helper, sizes->fb_width, sizes->fb_height);

	/* setup aperture base/size for vesafb takeover */
	info->apertures->ranges[0].base = rdev->ddev->mode_config.fb_base;
	info->apertures->ranges[0].size = rdev->mc.aper_size;

	/* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */

	if (info->screen_base == NULL) {
	ret = -ENOSPC;
	goto out_destroy_fbi;
	}

	DRM_INFO("fb mappable at 0x%lX\n", info->fix.smem_start);
	DRM_INFO("vram apper at 0x%lX\n", (unsigned long)rdev->mc.aper_base);
	DRM_INFO("size %lu\n", (unsigned long)radeon_bo_size(rbo));
	DRM_INFO("fb depth is %d\n", fb->format->depth);
	DRM_INFO(" pitch is %d\n", fb->pitches[0]);

	vga_switcheroo_client_fb_set(rdev->ddev->pdev, info);
	return 0;

	out_destroy_fbi:
	drm_fb_helper_release_fbi(helper);
	out_unref:
	if (rbo) {

	}
	if (fb && ret) {
	drm_gem_object_unreference_unlocked(gobj);
	drm_framebuffer_unregister_private(fb);
	drm_framebuffer_cleanup(fb);
	kfree(fb);
	}
	return ret;
	}

	void radeon_fb_output_poll_changed(struct radeon_device *rdev)
	{
	if (rdev->mode_info.rfbdev)
	drm_fb_helper_hotplug_event(&rdev->mode_info.rfbdev->helper);
	}

	static int radeon_fbdev_destroy(struct drm_device dev, struct radeon_fbdev rfbdev)
	{
	struct radeon_framebuffer *rfb = &rfbdev->rfb;

	drm_fb_helper_unregister_fbi(&rfbdev->helper);
	drm_fb_helper_release_fbi(&rfbdev->helper);

	if (rfb->obj) {
	radeonfb_destroy_pinned_object(rfb->obj);
	rfb->obj = NULL;
	}
	drm_fb_helper_fini(&rfbdev->helper);
	drm_framebuffer_unregister_private(&rfb->base);
	drm_framebuffer_cleanup(&rfb->base);

	return 0;
	}

	static const struct drm_fb_helper_funcs radeon_fb_helper_funcs = {
	.gamma_set = radeon_crtc_fb_gamma_set,
	.gamma_get = radeon_crtc_fb_gamma_get,
	.fb_probe = radeonfb_create,
	};

	int radeon_fbdev_init(struct radeon_device *rdev)
	{
	struct radeon_fbdev *rfbdev;
	int bpp_sel = 32;
	int ret;

	/* don't enable fbdev if no connectors */
	if (list_empty(&rdev->ddev->mode_config.connector_list))
	return 0;

	/* select 8 bpp console on RN50 or 16MB cards */
	if (ASIC_IS_RN50(rdev) \|\| rdev->mc.real_vram_size <= (3210241024))
	bpp_sel = 8;

	rfbdev = kzalloc(sizeof(struct radeon_fbdev), GFP_KERNEL);
	if (!rfbdev)
	return -ENOMEM;

	rfbdev->rdev = rdev;
	rdev->mode_info.rfbdev = rfbdev;

	drm_fb_helper_prepare(rdev->ddev, &rfbdev->helper,
	&radeon_fb_helper_funcs);

	ret = drm_fb_helper_init(rdev->ddev, &rfbdev->helper,
	RADEONFB_CONN_LIMIT);
	if (ret)
	goto free;

	ret = drm_fb_helper_single_add_all_connectors(&rfbdev->helper);
	if (ret)
	goto fini;

	/* disable all the possible outputs/crtcs before entering KMS mode */
	drm_helper_disable_unused_functions(rdev->ddev);

	ret = drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
	if (ret)
	goto fini;

	return 0;

	fini:
	drm_fb_helper_fini(&rfbdev->helper);
	free:
	kfree(rfbdev);
	return ret;
	}

	void radeon_fbdev_fini(struct radeon_device *rdev)
	{
	if (!rdev->mode_info.rfbdev)
	return;

	radeon_fbdev_destroy(rdev->ddev, rdev->mode_info.rfbdev);
	kfree(rdev->mode_info.rfbdev);
	rdev->mode_info.rfbdev = NULL;
	}

	void radeon_fbdev_set_suspend(struct radeon_device *rdev, int state)
	{
	if (rdev->mode_info.rfbdev)
	drm_fb_helper_set_suspend(&rdev->mode_info.rfbdev->helper, state);
	}

	bool radeon_fbdev_robj_is_fb(struct radeon_device rdev, struct radeon_bo robj)
	{
	if (!rdev->mode_info.rfbdev)
	return false;

	if (robj == gem_to_radeon_bo(rdev->mode_info.rfbdev->rfb.obj))
	return true;
	return false;
	}

	void radeon_fb_add_connector(struct radeon_device rdev, struct drm_connector connector)
	{
	if (rdev->mode_info.rfbdev)
	drm_fb_helper_add_one_connector(&rdev->mode_info.rfbdev->helper, connector);
	}

	void radeon_fb_remove_connector(struct radeon_device rdev, struct drm_connector connector)
	{
	if (rdev->mode_info.rfbdev)
	drm_fb_helper_remove_one_connector(&rdev->mode_info.rfbdev->helper, connector);
	}

	void radeon_fbdev_restore_mode(struct radeon_device *rdev)
	{
	struct radeon_fbdev *rfbdev = rdev->mode_info.rfbdev;
	struct drm_fb_helper *fb_helper;
	int ret;

	if (!rfbdev)
	return;

	fb_helper = &rfbdev->helper;

	ret = drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper);
	if (ret)
	DRM_DEBUG("failed to restore crtc mode\n");
	}