[mirror_ubuntu-focal-kernel.git] / drivers / gpu / drm / msm / msm_fb.c

/*
 * Copyright (C) 2013 Red Hat
 * Author: Rob Clark <robdclark@gmail.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 "msm_drv.h"
#include "msm_kms.h"

#include "drm_crtc.h"
#include "drm_crtc_helper.h"

struct msm_framebuffer {
	struct drm_framebuffer base;
	const struct msm_format *format;
	struct drm_gem_object *planes[MAX_PLANE];
};
#define to_msm_framebuffer(x) container_of(x, struct msm_framebuffer, base)


static int msm_framebuffer_create_handle(struct drm_framebuffer *fb,
		struct drm_file *file_priv,
		unsigned int *handle)
{
	struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
	return drm_gem_handle_create(file_priv,
			msm_fb->planes[0], handle);
}

static void msm_framebuffer_destroy(struct drm_framebuffer *fb)
{
	struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
	int i, n = drm_format_num_planes(fb->pixel_format);

	DBG("destroy: FB ID: %d (%p)", fb->base.id, fb);

	drm_framebuffer_cleanup(fb);

	for (i = 0; i < n; i++) {
		struct drm_gem_object *bo = msm_fb->planes[i];
		if (bo)
			drm_gem_object_unreference_unlocked(bo);
	}

	kfree(msm_fb);
}

static int msm_framebuffer_dirty(struct drm_framebuffer *fb,
		struct drm_file *file_priv, unsigned flags, unsigned color,
		struct drm_clip_rect *clips, unsigned num_clips)
{
	return 0;
}

static const struct drm_framebuffer_funcs msm_framebuffer_funcs = {
	.create_handle = msm_framebuffer_create_handle,
	.destroy = msm_framebuffer_destroy,
	.dirty = msm_framebuffer_dirty,
};

#ifdef CONFIG_DEBUG_FS
void msm_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
{
	struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
	int i, n = drm_format_num_planes(fb->pixel_format);

	seq_printf(m, "fb: %dx%d@%4.4s (%2d, ID:%d)\n",
			fb->width, fb->height, (char *)&fb->pixel_format,
			drm_framebuffer_read_refcount(fb), fb->base.id);

	for (i = 0; i < n; i++) {
		seq_printf(m, "   %d: offset=%d pitch=%d, obj: ",
				i, fb->offsets[i], fb->pitches[i]);
		msm_gem_describe(msm_fb->planes[i], m);
	}
}
#endif

/* prepare/pin all the fb's bo's for scanout.  Note that it is not valid
 * to prepare an fb more multiple different initiator 'id's.  But that
 * should be fine, since only the scanout (mdpN) side of things needs
 * this, the gpu doesn't care about fb's.
 */
int msm_framebuffer_prepare(struct drm_framebuffer *fb, int id)
{
	struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
	int ret, i, n = drm_format_num_planes(fb->pixel_format);
	uint32_t iova;

	for (i = 0; i < n; i++) {
		ret = msm_gem_get_iova(msm_fb->planes[i], id, &iova);
		DBG("FB[%u]: iova[%d]: %08x (%d)", fb->base.id, i, iova, ret);
		if (ret)
			return ret;
	}

	return 0;
}

void msm_framebuffer_cleanup(struct drm_framebuffer *fb, int id)
{
	struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
	int i, n = drm_format_num_planes(fb->pixel_format);

	for (i = 0; i < n; i++)
		msm_gem_put_iova(msm_fb->planes[i], id);
}

uint32_t msm_framebuffer_iova(struct drm_framebuffer *fb, int id, int plane)
{
	struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
	if (!msm_fb->planes[plane])
		return 0;
	return msm_gem_iova(msm_fb->planes[plane], id) + fb->offsets[plane];
}

struct drm_gem_object *msm_framebuffer_bo(struct drm_framebuffer *fb, int plane)
{
	struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
	return msm_fb->planes[plane];
}

const struct msm_format *msm_framebuffer_format(struct drm_framebuffer *fb)
{
	struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
	return msm_fb->format;
}

struct drm_framebuffer *msm_framebuffer_create(struct drm_device *dev,
		struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd)
{
	struct drm_gem_object *bos[4] = {0};
	struct drm_framebuffer *fb;
	int ret, i, n = drm_format_num_planes(mode_cmd->pixel_format);

	for (i = 0; i < n; i++) {
		bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]);
		if (!bos[i]) {
			ret = -ENXIO;
			goto out_unref;
		}
	}

	fb = msm_framebuffer_init(dev, mode_cmd, bos);
	if (IS_ERR(fb)) {
		ret = PTR_ERR(fb);
		goto out_unref;
	}

	return fb;

out_unref:
	for (i = 0; i < n; i++)
		drm_gem_object_unreference_unlocked(bos[i]);
	return ERR_PTR(ret);
}

struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev,
		const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)
{
	struct msm_drm_private *priv = dev->dev_private;
	struct msm_kms *kms = priv->kms;
	struct msm_framebuffer *msm_fb = NULL;
	struct drm_framebuffer *fb;
	const struct msm_format *format;
	int ret, i, n;
	unsigned int hsub, vsub;

	DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)",
			dev, mode_cmd, mode_cmd->width, mode_cmd->height,
			(char *)&mode_cmd->pixel_format);

	n = drm_format_num_planes(mode_cmd->pixel_format);
	hsub = drm_format_horz_chroma_subsampling(mode_cmd->pixel_format);
	vsub = drm_format_vert_chroma_subsampling(mode_cmd->pixel_format);

	format = kms->funcs->get_format(kms, mode_cmd->pixel_format);
	if (!format) {
		dev_err(dev->dev, "unsupported pixel format: %4.4s\n",
				(char *)&mode_cmd->pixel_format);
		ret = -EINVAL;
		goto fail;
	}

	msm_fb = kzalloc(sizeof(*msm_fb), GFP_KERNEL);
	if (!msm_fb) {
		ret = -ENOMEM;
		goto fail;
	}

	fb = &msm_fb->base;

	msm_fb->format = format;

	if (n > ARRAY_SIZE(msm_fb->planes)) {
		ret = -EINVAL;
		goto fail;
	}

	for (i = 0; i < n; i++) {
		unsigned int width = mode_cmd->width / (i ? hsub : 1);
		unsigned int height = mode_cmd->height / (i ? vsub : 1);
		unsigned int min_size;

		min_size = (height - 1) * mode_cmd->pitches[i]
			 + width * drm_format_plane_cpp(mode_cmd->pixel_format, i)
			 + mode_cmd->offsets[i];

		if (bos[i]->size < min_size) {
			ret = -EINVAL;
			goto fail;
		}

		msm_fb->planes[i] = bos[i];
	}

	drm_helper_mode_fill_fb_struct(fb, mode_cmd);

	ret = drm_framebuffer_init(dev, fb, &msm_framebuffer_funcs);
	if (ret) {
		dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
		goto fail;
	}

	DBG("create: FB ID: %d (%p)", fb->base.id, fb);

	return fb;

fail:
	kfree(msm_fb);

	return ERR_PTR(ret);
}
Commit	Line	Data
c8afe684 RC	1	/*
	2	* Copyright (C) 2013 Red Hat
	3	* Author: Rob Clark <robdclark@gmail.com>
	4	*
	5	* This program is free software; you can redistribute it and/or modify it
	6	* under the terms of the GNU General Public License version 2 as published by
	7	* the Free Software Foundation.
	8	*
	9	* This program is distributed in the hope that it will be useful, but WITHOUT
	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	12	* more details.
	13	*
	14	* You should have received a copy of the GNU General Public License along with
	15	* this program. If not, see <http://www.gnu.org/licenses/>.
	16	*/
	17
	18	#include "msm_drv.h"
dd2da6e3	19	#include "msm_kms.h"
c8afe684 RC	20
	21	#include "drm_crtc.h"
	22	#include "drm_crtc_helper.h"
	23
	24	struct msm_framebuffer {
	25	struct drm_framebuffer base;
	26	const struct msm_format *format;
7ca12718	27	struct drm_gem_object *planes[MAX_PLANE];
c8afe684 RC	28	};
	29	#define to_msm_framebuffer(x) container_of(x, struct msm_framebuffer, base)
	30
	31
	32	static int msm_framebuffer_create_handle(struct drm_framebuffer *fb,
	33	struct drm_file *file_priv,
	34	unsigned int *handle)
	35	{
	36	struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
	37	return drm_gem_handle_create(file_priv,
	38	msm_fb->planes[0], handle);
	39	}
	40
	41	static void msm_framebuffer_destroy(struct drm_framebuffer *fb)
	42	{
	43	struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
	44	int i, n = drm_format_num_planes(fb->pixel_format);
	45
	46	DBG("destroy: FB ID: %d (%p)", fb->base.id, fb);
	47
	48	drm_framebuffer_cleanup(fb);
	49
	50	for (i = 0; i < n; i++) {
	51	struct drm_gem_object *bo = msm_fb->planes[i];
	52	if (bo)
	53	drm_gem_object_unreference_unlocked(bo);
	54	}
	55
	56	kfree(msm_fb);
	57	}
	58
	59	static int msm_framebuffer_dirty(struct drm_framebuffer *fb,
	60	struct drm_file *file_priv, unsigned flags, unsigned color,
	61	struct drm_clip_rect *clips, unsigned num_clips)
	62	{
	63	return 0;
	64	}
	65
	66	static const struct drm_framebuffer_funcs msm_framebuffer_funcs = {
	67	.create_handle = msm_framebuffer_create_handle,
	68	.destroy = msm_framebuffer_destroy,
	69	.dirty = msm_framebuffer_dirty,
	70	};
	71
	72	#ifdef CONFIG_DEBUG_FS
	73	void msm_framebuffer_describe(struct drm_framebuffer fb, struct seq_file m)
	74	{
	75	struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
	76	int i, n = drm_format_num_planes(fb->pixel_format);
	77
	78	seq_printf(m, "fb: %dx%d@%4.4s (%2d, ID:%d)\n",
	79	fb->width, fb->height, (char *)&fb->pixel_format,
747a598f	80	drm_framebuffer_read_refcount(fb), fb->base.id);
c8afe684 RC	81
	82	for (i = 0; i < n; i++) {
	83	seq_printf(m, " %d: offset=%d pitch=%d, obj: ",
	84	i, fb->offsets[i], fb->pitches[i]);
	85	msm_gem_describe(msm_fb->planes[i], m);
	86	}
	87	}
	88	#endif
	89
2638d90a RC	90	/* prepare/pin all the fb's bo's for scanout. Note that it is not valid
	91	* to prepare an fb more multiple different initiator 'id's. But that
	92	* should be fine, since only the scanout (mdpN) side of things needs
	93	* this, the gpu doesn't care about fb's.
	94	*/
	95	int msm_framebuffer_prepare(struct drm_framebuffer *fb, int id)
	96	{
	97	struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
	98	int ret, i, n = drm_format_num_planes(fb->pixel_format);
	99	uint32_t iova;
	100
	101	for (i = 0; i < n; i++) {
	102	ret = msm_gem_get_iova(msm_fb->planes[i], id, &iova);
	103	DBG("FB[%u]: iova[%d]: %08x (%d)", fb->base.id, i, iova, ret);
	104	if (ret)
	105	return ret;
	106	}
	107
	108	return 0;
	109	}
	110
	111	void msm_framebuffer_cleanup(struct drm_framebuffer *fb, int id)
	112	{
	113	struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
	114	int i, n = drm_format_num_planes(fb->pixel_format);
	115
	116	for (i = 0; i < n; i++)
	117	msm_gem_put_iova(msm_fb->planes[i], id);
	118	}
	119
	120	uint32_t msm_framebuffer_iova(struct drm_framebuffer *fb, int id, int plane)
	121	{
	122	struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
3e2f29e4 RC	123	if (!msm_fb->planes[plane])
3e2f29e4 RC	124	return 0;
f8d9b515	125	return msm_gem_iova(msm_fb->planes[plane], id) + fb->offsets[plane];
2638d90a RC	126	}
2638d90a RC	127
c8afe684 RC	128	struct drm_gem_object msm_framebuffer_bo(struct drm_framebuffer fb, int plane)
	129	{
	130	struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
	131	return msm_fb->planes[plane];
	132	}
	133
	134	const struct msm_format msm_framebuffer_format(struct drm_framebuffer fb)
	135	{
	136	struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
	137	return msm_fb->format;
	138	}
	139
	140	struct drm_framebuffer msm_framebuffer_create(struct drm_device dev,
1eb83451	141	struct drm_file file, const struct drm_mode_fb_cmd2 mode_cmd)
c8afe684 RC	142	{
	143	struct drm_gem_object *bos[4] = {0};
	144	struct drm_framebuffer *fb;
	145	int ret, i, n = drm_format_num_planes(mode_cmd->pixel_format);
	146
	147	for (i = 0; i < n; i++) {
a8ad0bd8	148	bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]);
c8afe684 RC	149	if (!bos[i]) {
	150	ret = -ENXIO;
	151	goto out_unref;
	152	}
	153	}
	154
	155	fb = msm_framebuffer_init(dev, mode_cmd, bos);
	156	if (IS_ERR(fb)) {
	157	ret = PTR_ERR(fb);
	158	goto out_unref;
	159	}
	160
	161	return fb;
	162
	163	out_unref:
	164	for (i = 0; i < n; i++)
	165	drm_gem_object_unreference_unlocked(bos[i]);
	166	return ERR_PTR(ret);
	167	}
	168
	169	struct drm_framebuffer msm_framebuffer_init(struct drm_device dev,
1eb83451	170	const struct drm_mode_fb_cmd2 mode_cmd, struct drm_gem_object *bos)
c8afe684 RC	171	{
	172	struct msm_drm_private *priv = dev->dev_private;
	173	struct msm_kms *kms = priv->kms;
7194b62c SV	174	struct msm_framebuffer *msm_fb = NULL;
7194b62c SV	175	struct drm_framebuffer *fb;
c8afe684 RC	176	const struct msm_format *format;
	177	int ret, i, n;
	178	unsigned int hsub, vsub;
	179
	180	DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)",
	181	dev, mode_cmd, mode_cmd->width, mode_cmd->height,
	182	(char *)&mode_cmd->pixel_format);
	183
	184	n = drm_format_num_planes(mode_cmd->pixel_format);
	185	hsub = drm_format_horz_chroma_subsampling(mode_cmd->pixel_format);
	186	vsub = drm_format_vert_chroma_subsampling(mode_cmd->pixel_format);
	187
	188	format = kms->funcs->get_format(kms, mode_cmd->pixel_format);
	189	if (!format) {
	190	dev_err(dev->dev, "unsupported pixel format: %4.4s\n",
	191	(char *)&mode_cmd->pixel_format);
	192	ret = -EINVAL;
	193	goto fail;
	194	}
	195
	196	msm_fb = kzalloc(sizeof(*msm_fb), GFP_KERNEL);
	197	if (!msm_fb) {
	198	ret = -ENOMEM;
	199	goto fail;
	200	}
	201
	202	fb = &msm_fb->base;
	203
	204	msm_fb->format = format;
	205
10291bff RC	206	if (n > ARRAY_SIZE(msm_fb->planes)) {
	207	ret = -EINVAL;
	208	goto fail;
	209	}
	210
c8afe684 RC	211	for (i = 0; i < n; i++) {
	212	unsigned int width = mode_cmd->width / (i ? hsub : 1);
	213	unsigned int height = mode_cmd->height / (i ? vsub : 1);
	214	unsigned int min_size;
	215
	216	min_size = (height - 1) * mode_cmd->pitches[i]
	217	+ width * drm_format_plane_cpp(mode_cmd->pixel_format, i)
	218	+ mode_cmd->offsets[i];
	219
	220	if (bos[i]->size < min_size) {
	221	ret = -EINVAL;
	222	goto fail;
	223	}
	224
	225	msm_fb->planes[i] = bos[i];
	226	}
	227
	228	drm_helper_mode_fill_fb_struct(fb, mode_cmd);
	229
	230	ret = drm_framebuffer_init(dev, fb, &msm_framebuffer_funcs);
	231	if (ret) {
	232	dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
	233	goto fail;
	234	}
	235
	236	DBG("create: FB ID: %d (%p)", fb->base.id, fb);
	237
	238	return fb;
	239
	240	fail:
7194b62c	241	kfree(msm_fb);
c8afe684 RC	242
	243	return ERR_PTR(ret);
	244	}