drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c - kernel/msm-4.19 - Gitiles

 /*
  * 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/amdgpu_drm.h>
 #include "amdgpu.h"
 #include "cikd.h"

 #include <drm/drm_fb_helper.h>

 #include <linux/vga_switcheroo.h>

 /* object hierarchy -
    this contains a helper + a amdgpu fb
    the helper contains a pointer to amdgpu framebuffer baseclass.
 */
 struct amdgpu_fbdev {
 	struct drm_fb_helper helper;
 	struct amdgpu_framebuffer rfb;
 	struct amdgpu_device *adev;
 };

 static int
 amdgpufb_open(struct fb_info *info, int user)
 {
 	struct amdgpu_fbdev *rfbdev = info->par;
 	struct amdgpu_device *adev = rfbdev->adev;
 	int ret = pm_runtime_get_sync(adev->ddev->dev);
 	if (ret < 0 && ret != -EACCES) {
 		pm_runtime_mark_last_busy(adev->ddev->dev);
 		pm_runtime_put_autosuspend(adev->ddev->dev);
 		return ret;
 	}
 	return 0;
 }

 static int
 amdgpufb_release(struct fb_info *info, int user)
 {
 	struct amdgpu_fbdev *rfbdev = info->par;
 	struct amdgpu_device *adev = rfbdev->adev;

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

 static struct fb_ops amdgpufb_ops = {
 	.owner = THIS_MODULE,
 	DRM_FB_HELPER_DEFAULT_OPS,
 	.fb_open = amdgpufb_open,
 	.fb_release = amdgpufb_release,
 	.fb_fillrect = drm_fb_helper_cfb_fillrect,
 	.fb_copyarea = drm_fb_helper_cfb_copyarea,
 	.fb_imageblit = drm_fb_helper_cfb_imageblit,
 };


 int amdgpu_align_pitch(struct amdgpu_device *adev, int width, int cpp, bool tiled)
 {
 	int aligned = width;
 	int pitch_mask = 0;

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

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

 static void amdgpufb_destroy_pinned_object(struct drm_gem_object *gobj)
 {
 	struct amdgpu_bo *abo = gem_to_amdgpu_bo(gobj);
 	int ret;

 	ret = amdgpu_bo_reserve(abo, true);
 	if (likely(ret == 0)) {
 		amdgpu_bo_kunmap(abo);
 		amdgpu_bo_unpin(abo);
 		amdgpu_bo_unreserve(abo);
 	}
 	drm_gem_object_unreference_unlocked(gobj);
 }

 static int amdgpufb_create_pinned_object(struct amdgpu_fbdev *rfbdev,
 					 struct drm_mode_fb_cmd2 *mode_cmd,
 					 struct drm_gem_object **gobj_p)
 {
 	struct amdgpu_device *adev = rfbdev->adev;
 	struct drm_gem_object *gobj = NULL;
 	struct amdgpu_bo *abo = 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] = amdgpu_align_pitch(adev, mode_cmd->width, cpp,
 						  fb_tiled);

 	height = ALIGN(mode_cmd->height, 8);
 	size = mode_cmd->pitches[0] * height;
 	aligned_size = ALIGN(size, PAGE_SIZE);
 	ret = amdgpu_gem_object_create(adev, aligned_size, 0,
 				       AMDGPU_GEM_DOMAIN_VRAM,
 				       AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED |
 				       AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS |
 				       AMDGPU_GEM_CREATE_VRAM_CLEARED,
 				       true, &gobj);
 	if (ret) {
 		pr_err("failed to allocate framebuffer (%d)\n", aligned_size);
 		return -ENOMEM;
 	}
 	abo = gem_to_amdgpu_bo(gobj);

 	if (fb_tiled)
 		tiling_flags = AMDGPU_TILING_SET(ARRAY_MODE, GRPH_ARRAY_2D_TILED_THIN1);

 	ret = amdgpu_bo_reserve(abo, false);
 	if (unlikely(ret != 0))
 		goto out_unref;

 	if (tiling_flags) {
 		ret = amdgpu_bo_set_tiling_flags(abo,
 						 tiling_flags);
 		if (ret)
 			dev_err(adev->dev, "FB failed to set tiling flags\n");
 	}


 	ret = amdgpu_bo_pin(abo, AMDGPU_GEM_DOMAIN_VRAM, NULL);
 	if (ret) {
 		amdgpu_bo_unreserve(abo);
 		goto out_unref;
 	}
 	ret = amdgpu_bo_kmap(abo, NULL);
 	amdgpu_bo_unreserve(abo);
 	if (ret) {
 		goto out_unref;
 	}

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

 static int amdgpufb_create(struct drm_fb_helper *helper,
 			   struct drm_fb_helper_surface_size *sizes)
 {
 	struct amdgpu_fbdev *rfbdev = (struct amdgpu_fbdev *)helper;
 	struct amdgpu_device *adev = rfbdev->adev;
 	struct fb_info *info;
 	struct drm_framebuffer *fb = NULL;
 	struct drm_mode_fb_cmd2 mode_cmd;
 	struct drm_gem_object *gobj = NULL;
 	struct amdgpu_bo *abo = NULL;
 	int ret;
 	unsigned long tmp;

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

 	if (sizes->surface_bpp == 24)
 		sizes->surface_bpp = 32;

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

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

 	abo = gem_to_amdgpu_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;
 	}

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

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

 	fb = &rfbdev->rfb.base;

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

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

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

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

 	tmp = amdgpu_bo_gpu_offset(abo) - adev->mc.vram_start;
 	info->fix.smem_start = adev->mc.aper_base + tmp;
 	info->fix.smem_len = amdgpu_bo_size(abo);
 	info->screen_base = abo->kptr;
 	info->screen_size = amdgpu_bo_size(abo);

 	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 = adev->ddev->mode_config.fb_base;
 	info->apertures->ranges[0].size = adev->mc.aper_size;

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

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

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

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

 out:
 	if (abo) {

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

 void amdgpu_fb_output_poll_changed(struct amdgpu_device *adev)
 {
 	if (adev->mode_info.rfbdev)
 		drm_fb_helper_hotplug_event(&adev->mode_info.rfbdev->helper);
 }

 static int amdgpu_fbdev_destroy(struct drm_device *dev, struct amdgpu_fbdev *rfbdev)
 {
 	struct amdgpu_framebuffer *rfb = &rfbdev->rfb;

 	drm_fb_helper_unregister_fbi(&rfbdev->helper);

 	if (rfb->obj) {
 		amdgpufb_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;
 }

 /** Sets the color ramps on behalf of fbcon */
 static void amdgpu_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 				      u16 blue, int regno)
 {
 	struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);

 	amdgpu_crtc->lut_r[regno] = red >> 6;
 	amdgpu_crtc->lut_g[regno] = green >> 6;
 	amdgpu_crtc->lut_b[regno] = blue >> 6;
 }

 /** Gets the color ramps on behalf of fbcon */
 static void amdgpu_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
 				      u16 *blue, int regno)
 {
 	struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);

 	*red = amdgpu_crtc->lut_r[regno] << 6;
 	*green = amdgpu_crtc->lut_g[regno] << 6;
 	*blue = amdgpu_crtc->lut_b[regno] << 6;
 }

 static const struct drm_fb_helper_funcs amdgpu_fb_helper_funcs = {
 	.gamma_set = amdgpu_crtc_fb_gamma_set,
 	.gamma_get = amdgpu_crtc_fb_gamma_get,
 	.fb_probe = amdgpufb_create,
 };

 int amdgpu_fbdev_init(struct amdgpu_device *adev)
 {
 	struct amdgpu_fbdev *rfbdev;
 	int bpp_sel = 32;
 	int ret;

 	/* don't init fbdev on hw without DCE */
 	if (!adev->mode_info.mode_config_initialized)
 		return 0;

 	/* don't init fbdev if there are no connectors */
 	if (list_empty(&adev->ddev->mode_config.connector_list))
 		return 0;

 	/* select 8 bpp console on low vram cards */
 	if (adev->mc.real_vram_size <= (32*1024*1024))
 		bpp_sel = 8;

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

 	rfbdev->adev = adev;
 	adev->mode_info.rfbdev = rfbdev;

 	drm_fb_helper_prepare(adev->ddev, &rfbdev->helper,
 			&amdgpu_fb_helper_funcs);

 	ret = drm_fb_helper_init(adev->ddev, &rfbdev->helper,
 				 AMDGPUFB_CONN_LIMIT);
 	if (ret) {
 		kfree(rfbdev);
 		return ret;
 	}

 	drm_fb_helper_single_add_all_connectors(&rfbdev->helper);

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

 	drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
 	return 0;
 }

 void amdgpu_fbdev_fini(struct amdgpu_device *adev)
 {
 	if (!adev->mode_info.rfbdev)
 		return;

 	amdgpu_fbdev_destroy(adev->ddev, adev->mode_info.rfbdev);
 	kfree(adev->mode_info.rfbdev);
 	adev->mode_info.rfbdev = NULL;
 }

 void amdgpu_fbdev_set_suspend(struct amdgpu_device *adev, int state)
 {
 	if (adev->mode_info.rfbdev)
 		drm_fb_helper_set_suspend(&adev->mode_info.rfbdev->helper,
 			state);
 }

 int amdgpu_fbdev_total_size(struct amdgpu_device *adev)
 {
 	struct amdgpu_bo *robj;
 	int size = 0;

 	if (!adev->mode_info.rfbdev)
 		return 0;

 	robj = gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.obj);
 	size += amdgpu_bo_size(robj);
 	return size;
 }

 bool amdgpu_fbdev_robj_is_fb(struct amdgpu_device *adev, struct amdgpu_bo *robj)
 {
 	if (!adev->mode_info.rfbdev)
 		return false;
 	if (robj == gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.obj))
 		return true;
 	return false;
 }

 void amdgpu_fbdev_restore_mode(struct amdgpu_device *adev)
 {
 	struct amdgpu_fbdev *afbdev = adev->mode_info.rfbdev;
 	struct drm_fb_helper *fb_helper;
 	int ret;

 	if (!afbdev)
 		return;

 	fb_helper = &afbdev->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/amdgpu_drm.h>
	#include "amdgpu.h"
	#include "cikd.h"

	#include <drm/drm_fb_helper.h>

	#include <linux/vga_switcheroo.h>

	/* object hierarchy -
	this contains a helper + a amdgpu fb
	the helper contains a pointer to amdgpu framebuffer baseclass.
	*/
	struct amdgpu_fbdev {
	struct drm_fb_helper helper;
	struct amdgpu_framebuffer rfb;
	struct amdgpu_device *adev;
	};

	static int
	amdgpufb_open(struct fb_info *info, int user)
	{
	struct amdgpu_fbdev *rfbdev = info->par;
	struct amdgpu_device *adev = rfbdev->adev;
	int ret = pm_runtime_get_sync(adev->ddev->dev);
	if (ret < 0 && ret != -EACCES) {
	pm_runtime_mark_last_busy(adev->ddev->dev);
	pm_runtime_put_autosuspend(adev->ddev->dev);
	return ret;
	}
	return 0;
	}

	static int
	amdgpufb_release(struct fb_info *info, int user)
	{
	struct amdgpu_fbdev *rfbdev = info->par;
	struct amdgpu_device *adev = rfbdev->adev;

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

	static struct fb_ops amdgpufb_ops = {
	.owner = THIS_MODULE,
	DRM_FB_HELPER_DEFAULT_OPS,
	.fb_open = amdgpufb_open,
	.fb_release = amdgpufb_release,
	.fb_fillrect = drm_fb_helper_cfb_fillrect,
	.fb_copyarea = drm_fb_helper_cfb_copyarea,
	.fb_imageblit = drm_fb_helper_cfb_imageblit,
	};


	int amdgpu_align_pitch(struct amdgpu_device *adev, int width, int cpp, bool tiled)
	{
	int aligned = width;
	int pitch_mask = 0;

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

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

	static void amdgpufb_destroy_pinned_object(struct drm_gem_object *gobj)
	{
	struct amdgpu_bo *abo = gem_to_amdgpu_bo(gobj);
	int ret;

	ret = amdgpu_bo_reserve(abo, true);
	if (likely(ret == 0)) {
	amdgpu_bo_kunmap(abo);
	amdgpu_bo_unpin(abo);
	amdgpu_bo_unreserve(abo);
	}
	drm_gem_object_unreference_unlocked(gobj);
	}

	static int amdgpufb_create_pinned_object(struct amdgpu_fbdev *rfbdev,
	struct drm_mode_fb_cmd2 *mode_cmd,
	struct drm_gem_object **gobj_p)
	{
	struct amdgpu_device *adev = rfbdev->adev;
	struct drm_gem_object *gobj = NULL;
	struct amdgpu_bo *abo = 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] = amdgpu_align_pitch(adev, mode_cmd->width, cpp,
	fb_tiled);

	height = ALIGN(mode_cmd->height, 8);
	size = mode_cmd->pitches[0] * height;
	aligned_size = ALIGN(size, PAGE_SIZE);
	ret = amdgpu_gem_object_create(adev, aligned_size, 0,
	AMDGPU_GEM_DOMAIN_VRAM,
	AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED \|
	AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS \|
	AMDGPU_GEM_CREATE_VRAM_CLEARED,
	true, &gobj);
	if (ret) {
	pr_err("failed to allocate framebuffer (%d)\n", aligned_size);
	return -ENOMEM;
	}
	abo = gem_to_amdgpu_bo(gobj);

	if (fb_tiled)
	tiling_flags = AMDGPU_TILING_SET(ARRAY_MODE, GRPH_ARRAY_2D_TILED_THIN1);

	ret = amdgpu_bo_reserve(abo, false);
	if (unlikely(ret != 0))
	goto out_unref;

	if (tiling_flags) {
	ret = amdgpu_bo_set_tiling_flags(abo,
	tiling_flags);
	if (ret)
	dev_err(adev->dev, "FB failed to set tiling flags\n");
	}


	ret = amdgpu_bo_pin(abo, AMDGPU_GEM_DOMAIN_VRAM, NULL);
	if (ret) {
	amdgpu_bo_unreserve(abo);
	goto out_unref;
	}
	ret = amdgpu_bo_kmap(abo, NULL);
	amdgpu_bo_unreserve(abo);
	if (ret) {
	goto out_unref;
	}

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

	static int amdgpufb_create(struct drm_fb_helper *helper,
	struct drm_fb_helper_surface_size *sizes)
	{
	struct amdgpu_fbdev rfbdev = (struct amdgpu_fbdev )helper;
	struct amdgpu_device *adev = rfbdev->adev;
	struct fb_info *info;
	struct drm_framebuffer *fb = NULL;
	struct drm_mode_fb_cmd2 mode_cmd;
	struct drm_gem_object *gobj = NULL;
	struct amdgpu_bo *abo = NULL;
	int ret;
	unsigned long tmp;

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

	if (sizes->surface_bpp == 24)
	sizes->surface_bpp = 32;

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

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

	abo = gem_to_amdgpu_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;
	}

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

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

	fb = &rfbdev->rfb.base;

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

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

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

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

	tmp = amdgpu_bo_gpu_offset(abo) - adev->mc.vram_start;
	info->fix.smem_start = adev->mc.aper_base + tmp;
	info->fix.smem_len = amdgpu_bo_size(abo);
	info->screen_base = abo->kptr;
	info->screen_size = amdgpu_bo_size(abo);

	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 = adev->ddev->mode_config.fb_base;
	info->apertures->ranges[0].size = adev->mc.aper_size;

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

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

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

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

	out:
	if (abo) {

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

	void amdgpu_fb_output_poll_changed(struct amdgpu_device *adev)
	{
	if (adev->mode_info.rfbdev)
	drm_fb_helper_hotplug_event(&adev->mode_info.rfbdev->helper);
	}

	static int amdgpu_fbdev_destroy(struct drm_device dev, struct amdgpu_fbdev rfbdev)
	{
	struct amdgpu_framebuffer *rfb = &rfbdev->rfb;

	drm_fb_helper_unregister_fbi(&rfbdev->helper);

	if (rfb->obj) {
	amdgpufb_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;
	}

	/** Sets the color ramps on behalf of fbcon */
	static void amdgpu_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
	u16 blue, int regno)
	{
	struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);

	amdgpu_crtc->lut_r[regno] = red >> 6;
	amdgpu_crtc->lut_g[regno] = green >> 6;
	amdgpu_crtc->lut_b[regno] = blue >> 6;
	}

	/** Gets the color ramps on behalf of fbcon */
	static void amdgpu_crtc_fb_gamma_get(struct drm_crtc crtc, u16 red, u16 *green,
	u16 *blue, int regno)
	{
	struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);

	*red = amdgpu_crtc->lut_r[regno] << 6;
	*green = amdgpu_crtc->lut_g[regno] << 6;
	*blue = amdgpu_crtc->lut_b[regno] << 6;
	}

	static const struct drm_fb_helper_funcs amdgpu_fb_helper_funcs = {
	.gamma_set = amdgpu_crtc_fb_gamma_set,
	.gamma_get = amdgpu_crtc_fb_gamma_get,
	.fb_probe = amdgpufb_create,
	};

	int amdgpu_fbdev_init(struct amdgpu_device *adev)
	{
	struct amdgpu_fbdev *rfbdev;
	int bpp_sel = 32;
	int ret;

	/* don't init fbdev on hw without DCE */
	if (!adev->mode_info.mode_config_initialized)
	return 0;

	/* don't init fbdev if there are no connectors */
	if (list_empty(&adev->ddev->mode_config.connector_list))
	return 0;

	/* select 8 bpp console on low vram cards */
	if (adev->mc.real_vram_size <= (3210241024))
	bpp_sel = 8;

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

	rfbdev->adev = adev;
	adev->mode_info.rfbdev = rfbdev;

	drm_fb_helper_prepare(adev->ddev, &rfbdev->helper,
	&amdgpu_fb_helper_funcs);

	ret = drm_fb_helper_init(adev->ddev, &rfbdev->helper,
	AMDGPUFB_CONN_LIMIT);
	if (ret) {
	kfree(rfbdev);
	return ret;
	}

	drm_fb_helper_single_add_all_connectors(&rfbdev->helper);

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

	drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
	return 0;
	}

	void amdgpu_fbdev_fini(struct amdgpu_device *adev)
	{
	if (!adev->mode_info.rfbdev)
	return;

	amdgpu_fbdev_destroy(adev->ddev, adev->mode_info.rfbdev);
	kfree(adev->mode_info.rfbdev);
	adev->mode_info.rfbdev = NULL;
	}

	void amdgpu_fbdev_set_suspend(struct amdgpu_device *adev, int state)
	{
	if (adev->mode_info.rfbdev)
	drm_fb_helper_set_suspend(&adev->mode_info.rfbdev->helper,
	state);
	}

	int amdgpu_fbdev_total_size(struct amdgpu_device *adev)
	{
	struct amdgpu_bo *robj;
	int size = 0;

	if (!adev->mode_info.rfbdev)
	return 0;

	robj = gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.obj);
	size += amdgpu_bo_size(robj);
	return size;
	}

	bool amdgpu_fbdev_robj_is_fb(struct amdgpu_device adev, struct amdgpu_bo robj)
	{
	if (!adev->mode_info.rfbdev)
	return false;
	if (robj == gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.obj))
	return true;
	return false;
	}

	void amdgpu_fbdev_restore_mode(struct amdgpu_device *adev)
	{
	struct amdgpu_fbdev *afbdev = adev->mode_info.rfbdev;
	struct drm_fb_helper *fb_helper;
	int ret;

	if (!afbdev)
	return;

	fb_helper = &afbdev->helper;

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