[deliverable/linux.git] / drivers / gpu / drm / omapdrm / omap_fbdev.c

/*
 * drivers/gpu/drm/omapdrm/omap_fbdev.c
 *
 * Copyright (C) 2011 Texas Instruments
 * Author: Rob Clark <rob@ti.com>
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <drm/drm_crtc.h>
#include <drm/drm_fb_helper.h>

#include "omap_drv.h"

MODULE_PARM_DESC(ywrap, "Enable ywrap scrolling (omap44xx and later, default 'y')");
static bool ywrap_enabled = true;
module_param_named(ywrap, ywrap_enabled, bool, 0644);

/*
 * fbdev funcs, to implement legacy fbdev interface on top of drm driver
 */

#define to_omap_fbdev(x) container_of(x, struct omap_fbdev, base)

struct omap_fbdev {
	struct drm_fb_helper base;
	struct drm_framebuffer *fb;
	struct drm_gem_object *bo;
	bool ywrap_enabled;

	/* for deferred dmm roll when getting called in atomic ctx */
	struct work_struct work;
};

static struct drm_fb_helper *get_fb(struct fb_info *fbi);

static void pan_worker(struct work_struct *work)
{
	struct omap_fbdev *fbdev = container_of(work, struct omap_fbdev, work);
	struct fb_info *fbi = fbdev->base.fbdev;
	int npages;

	/* DMM roll shifts in 4K pages: */
	npages = fbi->fix.line_length >> PAGE_SHIFT;
	omap_gem_roll(fbdev->bo, fbi->var.yoffset * npages);
}

static int omap_fbdev_pan_display(struct fb_var_screeninfo *var,
		struct fb_info *fbi)
{
	struct drm_fb_helper *helper = get_fb(fbi);
	struct omap_fbdev *fbdev = to_omap_fbdev(helper);

	if (!helper)
		goto fallback;

	if (!fbdev->ywrap_enabled)
		goto fallback;

	if (drm_can_sleep()) {
		pan_worker(&fbdev->work);
	} else {
		struct omap_drm_private *priv = helper->dev->dev_private;
		queue_work(priv->wq, &fbdev->work);
	}

	return 0;

fallback:
	return drm_fb_helper_pan_display(var, fbi);
}

static struct fb_ops omap_fb_ops = {
	.owner = THIS_MODULE,

	/* Note: to properly handle manual update displays, we wrap the
	 * basic fbdev ops which write to the framebuffer
	 */
	.fb_read = fb_sys_read,
	.fb_write = fb_sys_write,
	.fb_fillrect = sys_fillrect,
	.fb_copyarea = sys_copyarea,
	.fb_imageblit = sys_imageblit,

	.fb_check_var = drm_fb_helper_check_var,
	.fb_set_par = drm_fb_helper_set_par,
	.fb_pan_display = omap_fbdev_pan_display,
	.fb_blank = drm_fb_helper_blank,
	.fb_setcmap = drm_fb_helper_setcmap,
};

static int omap_fbdev_create(struct drm_fb_helper *helper,
		struct drm_fb_helper_surface_size *sizes)
{
	struct omap_fbdev *fbdev = to_omap_fbdev(helper);
	struct drm_device *dev = helper->dev;
	struct omap_drm_private *priv = dev->dev_private;
	struct drm_framebuffer *fb = NULL;
	union omap_gem_size gsize;
	struct fb_info *fbi = NULL;
	struct drm_mode_fb_cmd2 mode_cmd = {0};
	dma_addr_t paddr;
	int ret;

	/* only doing ARGB32 since this is what is needed to alpha-blend
	 * with video overlays:
	 */
	sizes->surface_bpp = 32;
	sizes->surface_depth = 32;

	DBG("create fbdev: %dx%d@%d (%dx%d)", sizes->surface_width,
			sizes->surface_height, sizes->surface_bpp,
			sizes->fb_width, sizes->fb_height);

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

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

	mode_cmd.pitches[0] = align_pitch(
			mode_cmd.width * ((sizes->surface_bpp + 7) / 8),
			mode_cmd.width, sizes->surface_bpp);

	fbdev->ywrap_enabled = priv->has_dmm && ywrap_enabled;
	if (fbdev->ywrap_enabled) {
		/* need to align pitch to page size if using DMM scrolling */
		mode_cmd.pitches[0] = ALIGN(mode_cmd.pitches[0], PAGE_SIZE);
	}

	/* allocate backing bo */
	gsize = (union omap_gem_size){
		.bytes = PAGE_ALIGN(mode_cmd.pitches[0] * mode_cmd.height),
	};
	DBG("allocating %d bytes for fb %d", gsize.bytes, dev->primary->index);
	fbdev->bo = omap_gem_new(dev, gsize, OMAP_BO_SCANOUT | OMAP_BO_WC);
	if (!fbdev->bo) {
		dev_err(dev->dev, "failed to allocate buffer object\n");
		ret = -ENOMEM;
		goto fail;
	}

	fb = omap_framebuffer_init(dev, &mode_cmd, &fbdev->bo);
	if (IS_ERR(fb)) {
		dev_err(dev->dev, "failed to allocate fb\n");
		/* note: if fb creation failed, we can't rely on fb destroy
		 * to unref the bo:
		 */
		drm_gem_object_unreference(fbdev->bo);
		ret = PTR_ERR(fb);
		goto fail;
	}

	/* note: this keeps the bo pinned.. which is perhaps not ideal,
	 * but is needed as long as we use fb_mmap() to mmap to userspace
	 * (since this happens using fix.smem_start).  Possibly we could
	 * implement our own mmap using GEM mmap support to avoid this
	 * (non-tiled buffer doesn't need to be pinned for fbcon to write
	 * to it).  Then we just need to be sure that we are able to re-
	 * pin it in case of an opps.
	 */
	ret = omap_gem_get_paddr(fbdev->bo, &paddr, true);
	if (ret) {
		dev_err(dev->dev,
			"could not map (paddr)!  Skipping framebuffer alloc\n");
		ret = -ENOMEM;
		goto fail;
	}

	mutex_lock(&dev->struct_mutex);

	fbi = framebuffer_alloc(0, dev->dev);
	if (!fbi) {
		dev_err(dev->dev, "failed to allocate fb info\n");
		ret = -ENOMEM;
		goto fail_unlock;
	}

	DBG("fbi=%p, dev=%p", fbi, dev);

	fbdev->fb = fb;
	helper->fb = fb;
	helper->fbdev = fbi;

	fbi->par = helper;
	fbi->flags = FBINFO_DEFAULT;
	fbi->fbops = &omap_fb_ops;

	strcpy(fbi->fix.id, MODULE_NAME);

	ret = fb_alloc_cmap(&fbi->cmap, 256, 0);
	if (ret) {
		ret = -ENOMEM;
		goto fail_unlock;
	}

	drm_fb_helper_fill_fix(fbi, fb->pitches[0], fb->depth);
	drm_fb_helper_fill_var(fbi, helper, sizes->fb_width, sizes->fb_height);

	dev->mode_config.fb_base = paddr;

	fbi->screen_base = omap_gem_vaddr(fbdev->bo);
	fbi->screen_size = fbdev->bo->size;
	fbi->fix.smem_start = paddr;
	fbi->fix.smem_len = fbdev->bo->size;

	/* if we have DMM, then we can use it for scrolling by just
	 * shuffling pages around in DMM rather than doing sw blit.
	 */
	if (fbdev->ywrap_enabled) {
		DRM_INFO("Enabling DMM ywrap scrolling\n");
		fbi->flags |= FBINFO_HWACCEL_YWRAP | FBINFO_READS_FAST;
		fbi->fix.ywrapstep = 1;
	}


	DBG("par=%p, %dx%d", fbi->par, fbi->var.xres, fbi->var.yres);
	DBG("allocated %dx%d fb", fbdev->fb->width, fbdev->fb->height);

	mutex_unlock(&dev->struct_mutex);

	return 0;

fail_unlock:
	mutex_unlock(&dev->struct_mutex);
fail:

	if (ret) {
		if (fbi)
			framebuffer_release(fbi);
		if (fb) {
			drm_framebuffer_unregister_private(fb);
			drm_framebuffer_remove(fb);
		}
	}

	return ret;
}

static const struct drm_fb_helper_funcs omap_fb_helper_funcs = {
	.fb_probe = omap_fbdev_create,
};

static struct drm_fb_helper *get_fb(struct fb_info *fbi)
{
	if (!fbi || strcmp(fbi->fix.id, MODULE_NAME)) {
		/* these are not the fb's you're looking for */
		return NULL;
	}
	return fbi->par;
}

/* initialize fbdev helper */
struct drm_fb_helper *omap_fbdev_init(struct drm_device *dev)
{
	struct omap_drm_private *priv = dev->dev_private;
	struct omap_fbdev *fbdev = NULL;
	struct drm_fb_helper *helper;
	int ret = 0;

	fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
	if (!fbdev)
		goto fail;

	INIT_WORK(&fbdev->work, pan_worker);

	helper = &fbdev->base;

	drm_fb_helper_prepare(dev, helper, &omap_fb_helper_funcs);

	ret = drm_fb_helper_init(dev, helper,
			priv->num_crtcs, priv->num_connectors);
	if (ret) {
		dev_err(dev->dev, "could not init fbdev: ret=%d\n", ret);
		goto fail;
	}

	ret = drm_fb_helper_single_add_all_connectors(helper);
	if (ret)
		goto fini;

	/* disable all the possible outputs/crtcs before entering KMS mode */
	drm_helper_disable_unused_functions(dev);

	ret = drm_fb_helper_initial_config(helper, 32);
	if (ret)
		goto fini;

	priv->fbdev = helper;

	return helper;

fini:
	drm_fb_helper_fini(helper);
fail:
	kfree(fbdev);
	return NULL;
}

void omap_fbdev_free(struct drm_device *dev)
{
	struct omap_drm_private *priv = dev->dev_private;
	struct drm_fb_helper *helper = priv->fbdev;
	struct omap_fbdev *fbdev;
	struct fb_info *fbi;

	DBG();

	fbi = helper->fbdev;

	/* only cleanup framebuffer if it is present */
	if (fbi) {
		unregister_framebuffer(fbi);
		framebuffer_release(fbi);
	}

	drm_fb_helper_fini(helper);

	fbdev = to_omap_fbdev(priv->fbdev);

	/* release the ref taken in omap_fbdev_create() */
	omap_gem_put_paddr(fbdev->bo);

	/* this will free the backing object */
	if (fbdev->fb) {
		drm_framebuffer_unregister_private(fbdev->fb);
		drm_framebuffer_remove(fbdev->fb);
	}

	kfree(fbdev);

	priv->fbdev = NULL;
}
Commit	Line	Data
cd5351f4	1	/*
8bb0daff	2	* drivers/gpu/drm/omapdrm/omap_fbdev.c
cd5351f4 RC	3	*
	4	* Copyright (C) 2011 Texas Instruments
	5	* Author: Rob Clark <rob@ti.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify it
	8	* under the terms of the GNU General Public License version 2 as published by
	9	* the Free Software Foundation.
	10	*
	11	* This program is distributed in the hope that it will be useful, but WITHOUT
	12	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	13	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	14	* more details.
	15	*
	16	* You should have received a copy of the GNU General Public License along with
	17	* this program. If not, see <http://www.gnu.org/licenses/>.
	18	*/
	19
2d278f54 LP	20	#include <drm/drm_crtc.h>
2d278f54 LP	21	#include <drm/drm_fb_helper.h>
cd5351f4	22
2d278f54	23	#include "omap_drv.h"
cd5351f4	24
510d4d32 RC	25	MODULE_PARM_DESC(ywrap, "Enable ywrap scrolling (omap44xx and later, default 'y')");
	26	static bool ywrap_enabled = true;
	27	module_param_named(ywrap, ywrap_enabled, bool, 0644);
	28
cd5351f4 RC	29	/*
	30	* fbdev funcs, to implement legacy fbdev interface on top of drm driver
	31	*/
	32
	33	#define to_omap_fbdev(x) container_of(x, struct omap_fbdev, base)
	34
	35	struct omap_fbdev {
	36	struct drm_fb_helper base;
	37	struct drm_framebuffer *fb;
a6a91827	38	struct drm_gem_object *bo;
510d4d32	39	bool ywrap_enabled;
9b55b95a RC	40
	41	/* for deferred dmm roll when getting called in atomic ctx */
	42	struct work_struct work;
cd5351f4 RC	43	};
cd5351f4 RC	44
a6a91827	45	static struct drm_fb_helper get_fb(struct fb_info fbi);
cd5351f4	46
9b55b95a RC	47	static void pan_worker(struct work_struct *work)
	48	{
	49	struct omap_fbdev *fbdev = container_of(work, struct omap_fbdev, work);
	50	struct fb_info *fbi = fbdev->base.fbdev;
	51	int npages;
	52
	53	/* DMM roll shifts in 4K pages: */
	54	npages = fbi->fix.line_length >> PAGE_SHIFT;
	55	omap_gem_roll(fbdev->bo, fbi->var.yoffset * npages);
	56	}
	57
a6a91827 RC	58	static int omap_fbdev_pan_display(struct fb_var_screeninfo *var,
	59	struct fb_info *fbi)
	60	{
	61	struct drm_fb_helper *helper = get_fb(fbi);
	62	struct omap_fbdev *fbdev = to_omap_fbdev(helper);
a6a91827 RC	63
	64	if (!helper)
	65	goto fallback;
	66
510d4d32	67	if (!fbdev->ywrap_enabled)
a6a91827 RC	68	goto fallback;
a6a91827 RC	69
9b55b95a RC	70	if (drm_can_sleep()) {
	71	pan_worker(&fbdev->work);
	72	} else {
	73	struct omap_drm_private *priv = helper->dev->dev_private;
	74	queue_work(priv->wq, &fbdev->work);
	75	}
a6a91827 RC	76
	77	return 0;
	78
	79	fallback:
	80	return drm_fb_helper_pan_display(var, fbi);
	81	}
	82
cd5351f4 RC	83	static struct fb_ops omap_fb_ops = {
	84	.owner = THIS_MODULE,
	85
	86	/* Note: to properly handle manual update displays, we wrap the
	87	* basic fbdev ops which write to the framebuffer
	88	*/
	89	.fb_read = fb_sys_read,
5a35876e LP	90	.fb_write = fb_sys_write,
	91	.fb_fillrect = sys_fillrect,
	92	.fb_copyarea = sys_copyarea,
	93	.fb_imageblit = sys_imageblit,
cd5351f4 RC	94
	95	.fb_check_var = drm_fb_helper_check_var,
	96	.fb_set_par = drm_fb_helper_set_par,
a6a91827	97	.fb_pan_display = omap_fbdev_pan_display,
cd5351f4 RC	98	.fb_blank = drm_fb_helper_blank,
cd5351f4 RC	99	.fb_setcmap = drm_fb_helper_setcmap,
cd5351f4 RC	100	};
	101
	102	static int omap_fbdev_create(struct drm_fb_helper *helper,
	103	struct drm_fb_helper_surface_size *sizes)
	104	{
	105	struct omap_fbdev *fbdev = to_omap_fbdev(helper);
	106	struct drm_device *dev = helper->dev;
a6a91827	107	struct omap_drm_private *priv = dev->dev_private;
cd5351f4	108	struct drm_framebuffer *fb = NULL;
a6a91827	109	union omap_gem_size gsize;
cd5351f4	110	struct fb_info *fbi = NULL;
ae43d7ca	111	struct drm_mode_fb_cmd2 mode_cmd = {0};
cd5351f4	112	dma_addr_t paddr;
cd5351f4 RC	113	int ret;
	114
	115	/* only doing ARGB32 since this is what is needed to alpha-blend
	116	* with video overlays:
	117	*/
	118	sizes->surface_bpp = 32;
	119	sizes->surface_depth = 32;
	120
a6a91827 RC	121	DBG("create fbdev: %dx%d@%d (%dx%d)", sizes->surface_width,
	122	sizes->surface_height, sizes->surface_bpp,
	123	sizes->fb_width, sizes->fb_height);
cd5351f4	124
ae43d7ca RC	125	mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
	126	sizes->surface_depth);
	127
cd5351f4 RC	128	mode_cmd.width = sizes->surface_width;
	129	mode_cmd.height = sizes->surface_height;
	130
ae43d7ca RC	131	mode_cmd.pitches[0] = align_pitch(
	132	mode_cmd.width * ((sizes->surface_bpp + 7) / 8),
	133	mode_cmd.width, sizes->surface_bpp);
a6a91827	134
510d4d32 RC	135	fbdev->ywrap_enabled = priv->has_dmm && ywrap_enabled;
510d4d32 RC	136	if (fbdev->ywrap_enabled) {
a6a91827	137	/* need to align pitch to page size if using DMM scrolling */
ae43d7ca	138	mode_cmd.pitches[0] = ALIGN(mode_cmd.pitches[0], PAGE_SIZE);
a6a91827 RC	139	}
	140
	141	/* allocate backing bo */
	142	gsize = (union omap_gem_size){
ae43d7ca	143	.bytes = PAGE_ALIGN(mode_cmd.pitches[0] * mode_cmd.height),
a6a91827 RC	144	};
	145	DBG("allocating %d bytes for fb %d", gsize.bytes, dev->primary->index);
	146	fbdev->bo = omap_gem_new(dev, gsize, OMAP_BO_SCANOUT \| OMAP_BO_WC);
	147	if (!fbdev->bo) {
	148	dev_err(dev->dev, "failed to allocate buffer object\n");
ae43d7ca	149	ret = -ENOMEM;
a6a91827 RC	150	goto fail;
	151	}
	152
ae43d7ca RC	153	fb = omap_framebuffer_init(dev, &mode_cmd, &fbdev->bo);
ae43d7ca RC	154	if (IS_ERR(fb)) {
cd5351f4	155	dev_err(dev->dev, "failed to allocate fb\n");
ae43d7ca RC	156	/* note: if fb creation failed, we can't rely on fb destroy
	157	* to unref the bo:
	158	*/
	159	drm_gem_object_unreference(fbdev->bo);
	160	ret = PTR_ERR(fb);
	161	goto fail;
	162	}
	163
	164	/* note: this keeps the bo pinned.. which is perhaps not ideal,
	165	* but is needed as long as we use fb_mmap() to mmap to userspace
	166	* (since this happens using fix.smem_start). Possibly we could
	167	* implement our own mmap using GEM mmap support to avoid this
	168	* (non-tiled buffer doesn't need to be pinned for fbcon to write
	169	* to it). Then we just need to be sure that we are able to re-
	170	* pin it in case of an opps.
	171	*/
	172	ret = omap_gem_get_paddr(fbdev->bo, &paddr, true);
	173	if (ret) {
afb6a6a0 AG	174	dev_err(dev->dev,
afb6a6a0 AG	175	"could not map (paddr)! Skipping framebuffer alloc\n");
cd5351f4 RC	176	ret = -ENOMEM;
	177	goto fail;
	178	}
	179
	180	mutex_lock(&dev->struct_mutex);
	181
	182	fbi = framebuffer_alloc(0, dev->dev);
	183	if (!fbi) {
	184	dev_err(dev->dev, "failed to allocate fb info\n");
	185	ret = -ENOMEM;
	186	goto fail_unlock;
	187	}
	188
	189	DBG("fbi=%p, dev=%p", fbi, dev);
	190
	191	fbdev->fb = fb;
	192	helper->fb = fb;
	193	helper->fbdev = fbi;
	194
	195	fbi->par = helper;
	196	fbi->flags = FBINFO_DEFAULT;
	197	fbi->fbops = &omap_fb_ops;
	198
	199	strcpy(fbi->fix.id, MODULE_NAME);
	200
	201	ret = fb_alloc_cmap(&fbi->cmap, 256, 0);
	202	if (ret) {
	203	ret = -ENOMEM;
	204	goto fail_unlock;
	205	}
	206
ae43d7ca	207	drm_fb_helper_fill_fix(fbi, fb->pitches[0], fb->depth);
a6a91827	208	drm_fb_helper_fill_var(fbi, helper, sizes->fb_width, sizes->fb_height);
cd5351f4	209
cd5351f4 RC	210	dev->mode_config.fb_base = paddr;
cd5351f4 RC	211
ae43d7ca RC	212	fbi->screen_base = omap_gem_vaddr(fbdev->bo);
ae43d7ca RC	213	fbi->screen_size = fbdev->bo->size;
cd5351f4	214	fbi->fix.smem_start = paddr;
ae43d7ca	215	fbi->fix.smem_len = fbdev->bo->size;
cd5351f4	216
a6a91827 RC	217	/* if we have DMM, then we can use it for scrolling by just
	218	* shuffling pages around in DMM rather than doing sw blit.
	219	*/
510d4d32	220	if (fbdev->ywrap_enabled) {
a6a91827 RC	221	DRM_INFO("Enabling DMM ywrap scrolling\n");
	222	fbi->flags \|= FBINFO_HWACCEL_YWRAP \| FBINFO_READS_FAST;
	223	fbi->fix.ywrapstep = 1;
	224	}
	225
510d4d32	226
cd5351f4 RC	227	DBG("par=%p, %dx%d", fbi->par, fbi->var.xres, fbi->var.yres);
	228	DBG("allocated %dx%d fb", fbdev->fb->width, fbdev->fb->height);
	229
	230	mutex_unlock(&dev->struct_mutex);
	231
	232	return 0;
	233
	234	fail_unlock:
	235	mutex_unlock(&dev->struct_mutex);
	236	fail:
	237
	238	if (ret) {
	239	if (fbi)
	240	framebuffer_release(fbi);
36206361 DV	241	if (fb) {
36206361 DV	242	drm_framebuffer_unregister_private(fb);
f7eff60e	243	drm_framebuffer_remove(fb);
36206361	244	}
cd5351f4 RC	245	}
	246
	247	return ret;
	248	}
	249
3a493879	250	static const struct drm_fb_helper_funcs omap_fb_helper_funcs = {
cd5428a5	251	.fb_probe = omap_fbdev_create,
cd5351f4 RC	252	};
	253
	254	static struct drm_fb_helper get_fb(struct fb_info fbi)
	255	{
	256	if (!fbi \|\| strcmp(fbi->fix.id, MODULE_NAME)) {
	257	/* these are not the fb's you're looking for */
	258	return NULL;
	259	}
	260	return fbi->par;
	261	}
	262
cd5351f4 RC	263	/* initialize fbdev helper */
	264	struct drm_fb_helper omap_fbdev_init(struct drm_device dev)
	265	{
	266	struct omap_drm_private *priv = dev->dev_private;
	267	struct omap_fbdev *fbdev = NULL;
	268	struct drm_fb_helper *helper;
	269	int ret = 0;
	270
	271	fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
78110bb8	272	if (!fbdev)
cd5351f4	273	goto fail;
cd5351f4	274
9b55b95a RC	275	INIT_WORK(&fbdev->work, pan_worker);
9b55b95a RC	276
cd5351f4 RC	277	helper = &fbdev->base;
cd5351f4 RC	278
10a23102	279	drm_fb_helper_prepare(dev, helper, &omap_fb_helper_funcs);
cd5351f4 RC	280
	281	ret = drm_fb_helper_init(dev, helper,
	282	priv->num_crtcs, priv->num_connectors);
	283	if (ret) {
	284	dev_err(dev->dev, "could not init fbdev: ret=%d\n", ret);
	285	goto fail;
	286	}
	287
01934c2a TR	288	ret = drm_fb_helper_single_add_all_connectors(helper);
	289	if (ret)
	290	goto fini;
76a39dbf DV	291
	292	/* disable all the possible outputs/crtcs before entering KMS mode */
	293	drm_helper_disable_unused_functions(dev);
	294
01934c2a TR	295	ret = drm_fb_helper_initial_config(helper, 32);
	296	if (ret)
	297	goto fini;
cd5351f4 RC	298
	299	priv->fbdev = helper;
	300
	301	return helper;
	302
01934c2a TR	303	fini:
01934c2a TR	304	drm_fb_helper_fini(helper);
cd5351f4 RC	305	fail:
	306	kfree(fbdev);
	307	return NULL;
	308	}
	309
	310	void omap_fbdev_free(struct drm_device *dev)
	311	{
	312	struct omap_drm_private *priv = dev->dev_private;
	313	struct drm_fb_helper *helper = priv->fbdev;
	314	struct omap_fbdev *fbdev;
	315	struct fb_info *fbi;
	316
	317	DBG();
	318
	319	fbi = helper->fbdev;
	320
afb6a6a0 AG	321	/* only cleanup framebuffer if it is present */
	322	if (fbi) {
	323	unregister_framebuffer(fbi);
	324	framebuffer_release(fbi);
	325	}
cd5351f4 RC	326
	327	drm_fb_helper_fini(helper);
	328
	329	fbdev = to_omap_fbdev(priv->fbdev);
	330
5e19c06d TV	331	/* release the ref taken in omap_fbdev_create() */
	332	omap_gem_put_paddr(fbdev->bo);
	333
a6a91827	334	/* this will free the backing object */
36206361 DV	335	if (fbdev->fb) {
36206361 DV	336	drm_framebuffer_unregister_private(fbdev->fb);
f7eff60e	337	drm_framebuffer_remove(fbdev->fb);
36206361	338	}
a6a91827	339
a9e8d70c JL	340	kfree(fbdev);
a9e8d70c JL	341
cd5351f4 RC	342	priv->fbdev = NULL;
cd5351f4 RC	343	}