[deliverable/linux.git] / drivers / gpu / drm / tegra / fb.c

/*
 * Copyright (C) 2012-2013 Avionic Design GmbH
 * Copyright (C) 2012 NVIDIA CORPORATION.  All rights reserved.
 *
 * Based on the KMS/FB CMA helpers
 *   Copyright (C) 2012 Analog Device Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include "drm.h"
#include "gem.h"

static inline struct tegra_fb *to_tegra_fb(struct drm_framebuffer *fb)
{
	return container_of(fb, struct tegra_fb, base);
}

#ifdef CONFIG_DRM_TEGRA_FBDEV
static inline struct tegra_fbdev *to_tegra_fbdev(struct drm_fb_helper *helper)
{
	return container_of(helper, struct tegra_fbdev, base);
}
#endif

struct tegra_bo *tegra_fb_get_plane(struct drm_framebuffer *framebuffer,
				    unsigned int index)
{
	struct tegra_fb *fb = to_tegra_fb(framebuffer);

	if (index >= drm_format_num_planes(framebuffer->pixel_format))
		return NULL;

	return fb->planes[index];
}

bool tegra_fb_is_bottom_up(struct drm_framebuffer *framebuffer)
{
	struct tegra_fb *fb = to_tegra_fb(framebuffer);

	if (fb->planes[0]->flags & TEGRA_BO_BOTTOM_UP)
		return true;

	return false;
}

int tegra_fb_get_tiling(struct drm_framebuffer *framebuffer,
			struct tegra_bo_tiling *tiling)
{
	struct tegra_fb *fb = to_tegra_fb(framebuffer);

	/* TODO: handle YUV formats? */
	*tiling = fb->planes[0]->tiling;

	return 0;
}

static void tegra_fb_destroy(struct drm_framebuffer *framebuffer)
{
	struct tegra_fb *fb = to_tegra_fb(framebuffer);
	unsigned int i;

	for (i = 0; i < fb->num_planes; i++) {
		struct tegra_bo *bo = fb->planes[i];

		if (bo) {
			if (bo->pages && bo->vaddr)
				vunmap(bo->vaddr);

			drm_gem_object_unreference_unlocked(&bo->gem);
		}
	}

	drm_framebuffer_cleanup(framebuffer);
	kfree(fb->planes);
	kfree(fb);
}

static int tegra_fb_create_handle(struct drm_framebuffer *framebuffer,
				  struct drm_file *file, unsigned int *handle)
{
	struct tegra_fb *fb = to_tegra_fb(framebuffer);

	return drm_gem_handle_create(file, &fb->planes[0]->gem, handle);
}

static struct drm_framebuffer_funcs tegra_fb_funcs = {
	.destroy = tegra_fb_destroy,
	.create_handle = tegra_fb_create_handle,
};

static struct tegra_fb *tegra_fb_alloc(struct drm_device *drm,
				       struct drm_mode_fb_cmd2 *mode_cmd,
				       struct tegra_bo **planes,
				       unsigned int num_planes)
{
	struct tegra_fb *fb;
	unsigned int i;
	int err;

	fb = kzalloc(sizeof(*fb), GFP_KERNEL);
	if (!fb)
		return ERR_PTR(-ENOMEM);

	fb->planes = kzalloc(num_planes * sizeof(*planes), GFP_KERNEL);
	if (!fb->planes) {
		kfree(fb);
		return ERR_PTR(-ENOMEM);
	}

	fb->num_planes = num_planes;

	drm_helper_mode_fill_fb_struct(&fb->base, mode_cmd);

	for (i = 0; i < fb->num_planes; i++)
		fb->planes[i] = planes[i];

	err = drm_framebuffer_init(drm, &fb->base, &tegra_fb_funcs);
	if (err < 0) {
		dev_err(drm->dev, "failed to initialize framebuffer: %d\n",
			err);
		kfree(fb->planes);
		kfree(fb);
		return ERR_PTR(err);
	}

	return fb;
}

struct drm_framebuffer *tegra_fb_create(struct drm_device *drm,
					struct drm_file *file,
					struct drm_mode_fb_cmd2 *cmd)
{
	unsigned int hsub, vsub, i;
	struct tegra_bo *planes[4];
	struct drm_gem_object *gem;
	struct tegra_fb *fb;
	int err;

	hsub = drm_format_horz_chroma_subsampling(cmd->pixel_format);
	vsub = drm_format_vert_chroma_subsampling(cmd->pixel_format);

	for (i = 0; i < drm_format_num_planes(cmd->pixel_format); i++) {
		unsigned int width = cmd->width / (i ? hsub : 1);
		unsigned int height = cmd->height / (i ? vsub : 1);
		unsigned int size, bpp;

		gem = drm_gem_object_lookup(drm, file, cmd->handles[i]);
		if (!gem) {
			err = -ENXIO;
			goto unreference;
		}

		bpp = drm_format_plane_cpp(cmd->pixel_format, i);

		size = (height - 1) * cmd->pitches[i] +
		       width * bpp + cmd->offsets[i];

		if (gem->size < size) {
			err = -EINVAL;
			goto unreference;
		}

		planes[i] = to_tegra_bo(gem);
	}

	fb = tegra_fb_alloc(drm, cmd, planes, i);
	if (IS_ERR(fb)) {
		err = PTR_ERR(fb);
		goto unreference;
	}

	return &fb->base;

unreference:
	while (i--)
		drm_gem_object_unreference_unlocked(&planes[i]->gem);

	return ERR_PTR(err);
}

#ifdef CONFIG_DRM_TEGRA_FBDEV
static struct fb_ops tegra_fb_ops = {
	.owner = THIS_MODULE,
	.fb_fillrect = drm_fb_helper_sys_fillrect,
	.fb_copyarea = drm_fb_helper_sys_copyarea,
	.fb_imageblit = drm_fb_helper_sys_imageblit,
	.fb_check_var = drm_fb_helper_check_var,
	.fb_set_par = drm_fb_helper_set_par,
	.fb_blank = drm_fb_helper_blank,
	.fb_pan_display = drm_fb_helper_pan_display,
	.fb_setcmap = drm_fb_helper_setcmap,
};

static int tegra_fbdev_probe(struct drm_fb_helper *helper,
			     struct drm_fb_helper_surface_size *sizes)
{
	struct tegra_fbdev *fbdev = to_tegra_fbdev(helper);
	struct tegra_drm *tegra = helper->dev->dev_private;
	struct drm_device *drm = helper->dev;
	struct drm_mode_fb_cmd2 cmd = { 0 };
	unsigned int bytes_per_pixel;
	struct drm_framebuffer *fb;
	unsigned long offset;
	struct fb_info *info;
	struct tegra_bo *bo;
	size_t size;
	int err;

	bytes_per_pixel = DIV_ROUND_UP(sizes->surface_bpp, 8);

	cmd.width = sizes->surface_width;
	cmd.height = sizes->surface_height;
	cmd.pitches[0] = round_up(sizes->surface_width * bytes_per_pixel,
				  tegra->pitch_align);
	cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
						     sizes->surface_depth);

	size = cmd.pitches[0] * cmd.height;

	bo = tegra_bo_create(drm, size, 0);
	if (IS_ERR(bo))
		return PTR_ERR(bo);

	info = drm_fb_helper_alloc_fbi(helper);
	if (IS_ERR(info)) {
		dev_err(drm->dev, "failed to allocate framebuffer info\n");
		drm_gem_object_unreference_unlocked(&bo->gem);
		return PTR_ERR(info);
	}

	fbdev->fb = tegra_fb_alloc(drm, &cmd, &bo, 1);
	if (IS_ERR(fbdev->fb)) {
		err = PTR_ERR(fbdev->fb);
		dev_err(drm->dev, "failed to allocate DRM framebuffer: %d\n",
			err);
		drm_gem_object_unreference_unlocked(&bo->gem);
		goto release;
	}

	fb = &fbdev->fb->base;
	helper->fb = fb;
	helper->fbdev = info;

	info->par = helper;
	info->flags = FBINFO_FLAG_DEFAULT;
	info->fbops = &tegra_fb_ops;

	drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
	drm_fb_helper_fill_var(info, helper, fb->width, fb->height);

	offset = info->var.xoffset * bytes_per_pixel +
		 info->var.yoffset * fb->pitches[0];

	if (bo->pages) {
		bo->vaddr = vmap(bo->pages, bo->num_pages, VM_MAP,
				 pgprot_writecombine(PAGE_KERNEL));
		if (!bo->vaddr) {
			dev_err(drm->dev, "failed to vmap() framebuffer\n");
			err = -ENOMEM;
			goto destroy;
		}
	}

	drm->mode_config.fb_base = (resource_size_t)bo->paddr;
	info->screen_base = (void __iomem *)bo->vaddr + offset;
	info->screen_size = size;
	info->fix.smem_start = (unsigned long)(bo->paddr + offset);
	info->fix.smem_len = size;

	return 0;

destroy:
	drm_framebuffer_unregister_private(fb);
	tegra_fb_destroy(fb);
release:
	drm_fb_helper_release_fbi(helper);
	return err;
}

static const struct drm_fb_helper_funcs tegra_fb_helper_funcs = {
	.fb_probe = tegra_fbdev_probe,
};

static struct tegra_fbdev *tegra_fbdev_create(struct drm_device *drm)
{
	struct tegra_fbdev *fbdev;

	fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
	if (!fbdev) {
		dev_err(drm->dev, "failed to allocate DRM fbdev\n");
		return ERR_PTR(-ENOMEM);
	}

	drm_fb_helper_prepare(drm, &fbdev->base, &tegra_fb_helper_funcs);

	return fbdev;
}

static void tegra_fbdev_free(struct tegra_fbdev *fbdev)
{
	kfree(fbdev);
}

static int tegra_fbdev_init(struct tegra_fbdev *fbdev,
			    unsigned int preferred_bpp,
			    unsigned int num_crtc,
			    unsigned int max_connectors)
{
	struct drm_device *drm = fbdev->base.dev;
	int err;

	err = drm_fb_helper_init(drm, &fbdev->base, num_crtc, max_connectors);
	if (err < 0) {
		dev_err(drm->dev, "failed to initialize DRM FB helper: %d\n",
			err);
		return err;
	}

	err = drm_fb_helper_single_add_all_connectors(&fbdev->base);
	if (err < 0) {
		dev_err(drm->dev, "failed to add connectors: %d\n", err);
		goto fini;
	}

	err = drm_fb_helper_initial_config(&fbdev->base, preferred_bpp);
	if (err < 0) {
		dev_err(drm->dev, "failed to set initial configuration: %d\n",
			err);
		goto fini;
	}

	return 0;

fini:
	drm_fb_helper_fini(&fbdev->base);
	return err;
}

static void tegra_fbdev_exit(struct tegra_fbdev *fbdev)
{

	drm_fb_helper_unregister_fbi(&fbdev->base);
	drm_fb_helper_release_fbi(&fbdev->base);

	if (fbdev->fb) {
		drm_framebuffer_unregister_private(&fbdev->fb->base);
		drm_framebuffer_remove(&fbdev->fb->base);
	}

	drm_fb_helper_fini(&fbdev->base);
	tegra_fbdev_free(fbdev);
}

void tegra_fbdev_restore_mode(struct tegra_fbdev *fbdev)
{
	if (fbdev)
		drm_fb_helper_restore_fbdev_mode_unlocked(&fbdev->base);
}

void tegra_fb_output_poll_changed(struct drm_device *drm)
{
	struct tegra_drm *tegra = drm->dev_private;

	if (tegra->fbdev)
		drm_fb_helper_hotplug_event(&tegra->fbdev->base);
}
#endif

int tegra_drm_fb_prepare(struct drm_device *drm)
{
#ifdef CONFIG_DRM_TEGRA_FBDEV
	struct tegra_drm *tegra = drm->dev_private;

	tegra->fbdev = tegra_fbdev_create(drm);
	if (IS_ERR(tegra->fbdev))
		return PTR_ERR(tegra->fbdev);
#endif

	return 0;
}

void tegra_drm_fb_free(struct drm_device *drm)
{
#ifdef CONFIG_DRM_TEGRA_FBDEV
	struct tegra_drm *tegra = drm->dev_private;

	tegra_fbdev_free(tegra->fbdev);
#endif
}

int tegra_drm_fb_init(struct drm_device *drm)
{
#ifdef CONFIG_DRM_TEGRA_FBDEV
	struct tegra_drm *tegra = drm->dev_private;
	int err;

	err = tegra_fbdev_init(tegra->fbdev, 32, drm->mode_config.num_crtc,
			       drm->mode_config.num_connector);
	if (err < 0)
		return err;
#endif

	return 0;
}

void tegra_drm_fb_exit(struct drm_device *drm)
{
#ifdef CONFIG_DRM_TEGRA_FBDEV
	struct tegra_drm *tegra = drm->dev_private;

	tegra_fbdev_exit(tegra->fbdev);
#endif
}
Commit	Line	Data
d8f4a9ed	1	/*
de2ba664	2	* Copyright (C) 2012-2013 Avionic Design GmbH
d8f4a9ed TR	3	* Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved.
d8f4a9ed TR	4	*
de2ba664 AM	5	* Based on the KMS/FB CMA helpers
	6	* Copyright (C) 2012 Analog Device Inc.
	7	*
d8f4a9ed TR	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
	11	*/
	12
	13	#include "drm.h"
de2ba664 AM	14	#include "gem.h"
	15
	16	static inline struct tegra_fb to_tegra_fb(struct drm_framebuffer fb)
	17	{
	18	return container_of(fb, struct tegra_fb, base);
	19	}
	20
60c2f709	21	#ifdef CONFIG_DRM_TEGRA_FBDEV
de2ba664 AM	22	static inline struct tegra_fbdev to_tegra_fbdev(struct drm_fb_helper helper)
	23	{
	24	return container_of(helper, struct tegra_fbdev, base);
	25	}
60c2f709	26	#endif
de2ba664 AM	27
	28	struct tegra_bo tegra_fb_get_plane(struct drm_framebuffer framebuffer,
	29	unsigned int index)
	30	{
	31	struct tegra_fb *fb = to_tegra_fb(framebuffer);
	32
	33	if (index >= drm_format_num_planes(framebuffer->pixel_format))
	34	return NULL;
	35
	36	return fb->planes[index];
	37	}
	38
db7fbdfd TR	39	bool tegra_fb_is_bottom_up(struct drm_framebuffer *framebuffer)
	40	{
	41	struct tegra_fb *fb = to_tegra_fb(framebuffer);
	42
	43	if (fb->planes[0]->flags & TEGRA_BO_BOTTOM_UP)
	44	return true;
	45
	46	return false;
	47	}
	48
c134f019 TR	49	int tegra_fb_get_tiling(struct drm_framebuffer *framebuffer,
c134f019 TR	50	struct tegra_bo_tiling *tiling)
773af77f TR	51	{
	52	struct tegra_fb *fb = to_tegra_fb(framebuffer);
	53
c134f019 TR	54	/* TODO: handle YUV formats? */
c134f019 TR	55	*tiling = fb->planes[0]->tiling;
773af77f	56
c134f019	57	return 0;
773af77f TR	58	}
773af77f TR	59
de2ba664 AM	60	static void tegra_fb_destroy(struct drm_framebuffer *framebuffer)
	61	{
	62	struct tegra_fb *fb = to_tegra_fb(framebuffer);
	63	unsigned int i;
	64
	65	for (i = 0; i < fb->num_planes; i++) {
	66	struct tegra_bo *bo = fb->planes[i];
	67
df06b759 TR	68	if (bo) {
	69	if (bo->pages && bo->vaddr)
	70	vunmap(bo->vaddr);
	71
de2ba664	72	drm_gem_object_unreference_unlocked(&bo->gem);
df06b759	73	}
de2ba664 AM	74	}
	75
	76	drm_framebuffer_cleanup(framebuffer);
	77	kfree(fb->planes);
	78	kfree(fb);
	79	}
	80
	81	static int tegra_fb_create_handle(struct drm_framebuffer *framebuffer,
	82	struct drm_file file, unsigned int handle)
	83	{
	84	struct tegra_fb *fb = to_tegra_fb(framebuffer);
	85
	86	return drm_gem_handle_create(file, &fb->planes[0]->gem, handle);
	87	}
	88
	89	static struct drm_framebuffer_funcs tegra_fb_funcs = {
	90	.destroy = tegra_fb_destroy,
	91	.create_handle = tegra_fb_create_handle,
	92	};
	93
	94	static struct tegra_fb tegra_fb_alloc(struct drm_device drm,
	95	struct drm_mode_fb_cmd2 *mode_cmd,
	96	struct tegra_bo **planes,
	97	unsigned int num_planes)
	98	{
	99	struct tegra_fb *fb;
	100	unsigned int i;
	101	int err;
	102
	103	fb = kzalloc(sizeof(*fb), GFP_KERNEL);
	104	if (!fb)
	105	return ERR_PTR(-ENOMEM);
	106
	107	fb->planes = kzalloc(num_planes * sizeof(*planes), GFP_KERNEL);
6b7c79d1 DC	108	if (!fb->planes) {
6b7c79d1 DC	109	kfree(fb);
de2ba664	110	return ERR_PTR(-ENOMEM);
6b7c79d1	111	}
de2ba664 AM	112
	113	fb->num_planes = num_planes;
	114
	115	drm_helper_mode_fill_fb_struct(&fb->base, mode_cmd);
	116
	117	for (i = 0; i < fb->num_planes; i++)
	118	fb->planes[i] = planes[i];
	119
	120	err = drm_framebuffer_init(drm, &fb->base, &tegra_fb_funcs);
	121	if (err < 0) {
	122	dev_err(drm->dev, "failed to initialize framebuffer: %d\n",
	123	err);
	124	kfree(fb->planes);
	125	kfree(fb);
	126	return ERR_PTR(err);
	127	}
	128
	129	return fb;
	130	}
	131
f9914214 TR	132	struct drm_framebuffer tegra_fb_create(struct drm_device drm,
	133	struct drm_file *file,
	134	struct drm_mode_fb_cmd2 *cmd)
de2ba664 AM	135	{
	136	unsigned int hsub, vsub, i;
	137	struct tegra_bo *planes[4];
	138	struct drm_gem_object *gem;
	139	struct tegra_fb *fb;
	140	int err;
	141
	142	hsub = drm_format_horz_chroma_subsampling(cmd->pixel_format);
	143	vsub = drm_format_vert_chroma_subsampling(cmd->pixel_format);
	144
	145	for (i = 0; i < drm_format_num_planes(cmd->pixel_format); i++) {
	146	unsigned int width = cmd->width / (i ? hsub : 1);
	147	unsigned int height = cmd->height / (i ? vsub : 1);
	148	unsigned int size, bpp;
	149
	150	gem = drm_gem_object_lookup(drm, file, cmd->handles[i]);
	151	if (!gem) {
	152	err = -ENXIO;
	153	goto unreference;
	154	}
	155
	156	bpp = drm_format_plane_cpp(cmd->pixel_format, i);
	157
	158	size = (height - 1) * cmd->pitches[i] +
	159	width * bpp + cmd->offsets[i];
	160
	161	if (gem->size < size) {
	162	err = -EINVAL;
	163	goto unreference;
	164	}
	165
	166	planes[i] = to_tegra_bo(gem);
	167	}
	168
	169	fb = tegra_fb_alloc(drm, cmd, planes, i);
	170	if (IS_ERR(fb)) {
	171	err = PTR_ERR(fb);
	172	goto unreference;
	173	}
	174
	175	return &fb->base;
	176
	177	unreference:
	178	while (i--)
	179	drm_gem_object_unreference_unlocked(&planes[i]->gem);
d8f4a9ed	180
de2ba664 AM	181	return ERR_PTR(err);
	182	}
	183
60c2f709	184	#ifdef CONFIG_DRM_TEGRA_FBDEV
de2ba664 AM	185	static struct fb_ops tegra_fb_ops = {
de2ba664 AM	186	.owner = THIS_MODULE,
0f7d9052 AT	187	.fb_fillrect = drm_fb_helper_sys_fillrect,
	188	.fb_copyarea = drm_fb_helper_sys_copyarea,
	189	.fb_imageblit = drm_fb_helper_sys_imageblit,
de2ba664 AM	190	.fb_check_var = drm_fb_helper_check_var,
	191	.fb_set_par = drm_fb_helper_set_par,
	192	.fb_blank = drm_fb_helper_blank,
	193	.fb_pan_display = drm_fb_helper_pan_display,
	194	.fb_setcmap = drm_fb_helper_setcmap,
	195	};
	196
	197	static int tegra_fbdev_probe(struct drm_fb_helper *helper,
	198	struct drm_fb_helper_surface_size *sizes)
	199	{
	200	struct tegra_fbdev *fbdev = to_tegra_fbdev(helper);
d1f3e1e0	201	struct tegra_drm *tegra = helper->dev->dev_private;
de2ba664 AM	202	struct drm_device *drm = helper->dev;
	203	struct drm_mode_fb_cmd2 cmd = { 0 };
	204	unsigned int bytes_per_pixel;
	205	struct drm_framebuffer *fb;
	206	unsigned long offset;
	207	struct fb_info *info;
	208	struct tegra_bo *bo;
	209	size_t size;
	210	int err;
	211
	212	bytes_per_pixel = DIV_ROUND_UP(sizes->surface_bpp, 8);
	213
	214	cmd.width = sizes->surface_width;
	215	cmd.height = sizes->surface_height;
d1f3e1e0 TR	216	cmd.pitches[0] = round_up(sizes->surface_width * bytes_per_pixel,
d1f3e1e0 TR	217	tegra->pitch_align);
de2ba664 AM	218	cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
	219	sizes->surface_depth);
	220
	221	size = cmd.pitches[0] * cmd.height;
	222
773af77f	223	bo = tegra_bo_create(drm, size, 0);
de2ba664 AM	224	if (IS_ERR(bo))
	225	return PTR_ERR(bo);
	226
0f7d9052 AT	227	info = drm_fb_helper_alloc_fbi(helper);
0f7d9052 AT	228	if (IS_ERR(info)) {
de2ba664	229	dev_err(drm->dev, "failed to allocate framebuffer info\n");
b88f005e	230	drm_gem_object_unreference_unlocked(&bo->gem);
0f7d9052	231	return PTR_ERR(info);
de2ba664 AM	232	}
	233
	234	fbdev->fb = tegra_fb_alloc(drm, &cmd, &bo, 1);
	235	if (IS_ERR(fbdev->fb)) {
de2ba664	236	err = PTR_ERR(fbdev->fb);
cb10c81f TR	237	dev_err(drm->dev, "failed to allocate DRM framebuffer: %d\n",
cb10c81f TR	238	err);
b88f005e	239	drm_gem_object_unreference_unlocked(&bo->gem);
de2ba664 AM	240	goto release;
	241	}
	242
	243	fb = &fbdev->fb->base;
	244	helper->fb = fb;
	245	helper->fbdev = info;
	246
	247	info->par = helper;
	248	info->flags = FBINFO_FLAG_DEFAULT;
	249	info->fbops = &tegra_fb_ops;
	250
de2ba664 AM	251	drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
	252	drm_fb_helper_fill_var(info, helper, fb->width, fb->height);
	253
	254	offset = info->var.xoffset * bytes_per_pixel +
	255	info->var.yoffset * fb->pitches[0];
	256
df06b759 TR	257	if (bo->pages) {
	258	bo->vaddr = vmap(bo->pages, bo->num_pages, VM_MAP,
	259	pgprot_writecombine(PAGE_KERNEL));
	260	if (!bo->vaddr) {
	261	dev_err(drm->dev, "failed to vmap() framebuffer\n");
	262	err = -ENOMEM;
	263	goto destroy;
	264	}
	265	}
	266
de2ba664	267	drm->mode_config.fb_base = (resource_size_t)bo->paddr;
9ab34151	268	info->screen_base = (void __iomem *)bo->vaddr + offset;
de2ba664 AM	269	info->screen_size = size;
	270	info->fix.smem_start = (unsigned long)(bo->paddr + offset);
	271	info->fix.smem_len = size;
	272
	273	return 0;
	274
	275	destroy:
	276	drm_framebuffer_unregister_private(fb);
	277	tegra_fb_destroy(fb);
	278	release:
0f7d9052	279	drm_fb_helper_release_fbi(helper);
de2ba664 AM	280	return err;
	281	}
	282
3a493879	283	static const struct drm_fb_helper_funcs tegra_fb_helper_funcs = {
de2ba664 AM	284	.fb_probe = tegra_fbdev_probe,
	285	};
	286
e2215321	287	static struct tegra_fbdev tegra_fbdev_create(struct drm_device drm)
de2ba664	288	{
de2ba664	289	struct tegra_fbdev *fbdev;
de2ba664 AM	290
	291	fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
	292	if (!fbdev) {
	293	dev_err(drm->dev, "failed to allocate DRM fbdev\n");
	294	return ERR_PTR(-ENOMEM);
	295	}
	296
10a23102	297	drm_fb_helper_prepare(drm, &fbdev->base, &tegra_fb_helper_funcs);
de2ba664	298
e2215321 TR	299	return fbdev;
	300	}
	301
1d1e6fe9 TR	302	static void tegra_fbdev_free(struct tegra_fbdev *fbdev)
	303	{
	304	kfree(fbdev);
	305	}
	306
e2215321 TR	307	static int tegra_fbdev_init(struct tegra_fbdev *fbdev,
	308	unsigned int preferred_bpp,
	309	unsigned int num_crtc,
	310	unsigned int max_connectors)
	311	{
	312	struct drm_device *drm = fbdev->base.dev;
	313	int err;
	314
de2ba664 AM	315	err = drm_fb_helper_init(drm, &fbdev->base, num_crtc, max_connectors);
de2ba664 AM	316	if (err < 0) {
cb10c81f TR	317	dev_err(drm->dev, "failed to initialize DRM FB helper: %d\n",
cb10c81f TR	318	err);
e2215321	319	return err;
de2ba664 AM	320	}
	321
	322	err = drm_fb_helper_single_add_all_connectors(&fbdev->base);
	323	if (err < 0) {
cb10c81f	324	dev_err(drm->dev, "failed to add connectors: %d\n", err);
de2ba664 AM	325	goto fini;
	326	}
	327
de2ba664 AM	328	err = drm_fb_helper_initial_config(&fbdev->base, preferred_bpp);
de2ba664 AM	329	if (err < 0) {
cb10c81f TR	330	dev_err(drm->dev, "failed to set initial configuration: %d\n",
cb10c81f TR	331	err);
de2ba664 AM	332	goto fini;
	333	}
	334
e2215321	335	return 0;
de2ba664 AM	336
	337	fini:
	338	drm_fb_helper_fini(&fbdev->base);
e2215321	339	return err;
de2ba664 AM	340	}
de2ba664 AM	341
1d1e6fe9	342	static void tegra_fbdev_exit(struct tegra_fbdev *fbdev)
de2ba664	343	{
de2ba664	344
0f7d9052 AT	345	drm_fb_helper_unregister_fbi(&fbdev->base);
0f7d9052 AT	346	drm_fb_helper_release_fbi(&fbdev->base);
de2ba664 AM	347
	348	if (fbdev->fb) {
	349	drm_framebuffer_unregister_private(&fbdev->fb->base);
3feaf3e5	350	drm_framebuffer_remove(&fbdev->fb->base);
de2ba664 AM	351	}
	352
	353	drm_fb_helper_fini(&fbdev->base);
1d1e6fe9	354	tegra_fbdev_free(fbdev);
de2ba664 AM	355	}
de2ba664 AM	356
60c2f709 TR	357	void tegra_fbdev_restore_mode(struct tegra_fbdev *fbdev)
60c2f709 TR	358	{
5ea1f752 RC	359	if (fbdev)
5ea1f752 RC	360	drm_fb_helper_restore_fbdev_mode_unlocked(&fbdev->base);
60c2f709 TR	361	}
60c2f709 TR	362
f9914214	363	void tegra_fb_output_poll_changed(struct drm_device *drm)
d8f4a9ed	364	{
386a2a71	365	struct tegra_drm *tegra = drm->dev_private;
d8f4a9ed	366
386a2a71 TR	367	if (tegra->fbdev)
386a2a71 TR	368	drm_fb_helper_hotplug_event(&tegra->fbdev->base);
d8f4a9ed	369	}
60c2f709	370	#endif
d8f4a9ed	371
e2215321	372	int tegra_drm_fb_prepare(struct drm_device *drm)
d8f4a9ed	373	{
60c2f709	374	#ifdef CONFIG_DRM_TEGRA_FBDEV
386a2a71	375	struct tegra_drm *tegra = drm->dev_private;
d8f4a9ed	376
e2215321	377	tegra->fbdev = tegra_fbdev_create(drm);
60c2f709 TR	378	if (IS_ERR(tegra->fbdev))
	379	return PTR_ERR(tegra->fbdev);
	380	#endif
d8f4a9ed TR	381
	382	return 0;
	383	}
	384
1d1e6fe9 TR	385	void tegra_drm_fb_free(struct drm_device *drm)
	386	{
	387	#ifdef CONFIG_DRM_TEGRA_FBDEV
	388	struct tegra_drm *tegra = drm->dev_private;
	389
	390	tegra_fbdev_free(tegra->fbdev);
	391	#endif
	392	}
	393
e2215321 TR	394	int tegra_drm_fb_init(struct drm_device *drm)
	395	{
	396	#ifdef CONFIG_DRM_TEGRA_FBDEV
	397	struct tegra_drm *tegra = drm->dev_private;
	398	int err;
	399
	400	err = tegra_fbdev_init(tegra->fbdev, 32, drm->mode_config.num_crtc,
	401	drm->mode_config.num_connector);
	402	if (err < 0)
	403	return err;
	404	#endif
	405
	406	return 0;
	407	}
	408
d8f4a9ed TR	409	void tegra_drm_fb_exit(struct drm_device *drm)
d8f4a9ed TR	410	{
60c2f709	411	#ifdef CONFIG_DRM_TEGRA_FBDEV
386a2a71	412	struct tegra_drm *tegra = drm->dev_private;
d8f4a9ed	413
1d1e6fe9	414	tegra_fbdev_exit(tegra->fbdev);
60c2f709	415	#endif
d8f4a9ed	416	}