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v4.6
 
  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"
 19#include "msm_kms.h"
 20
 21#include "drm_crtc.h"
 22#include "drm_crtc_helper.h"
 23
 24struct msm_framebuffer {
 25	struct drm_framebuffer base;
 26	const struct msm_format *format;
 27	struct drm_gem_object *planes[MAX_PLANE];
 
 
 
 
 
 
 28};
 29#define to_msm_framebuffer(x) container_of(x, struct msm_framebuffer, base)
 30
 
 
 31
 32static 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
 41static 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
 59static 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
 66static 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
 73void 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,
 80			fb->refcount.refcount.counter, fb->base.id);
 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
 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 */
 95int 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
111void 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
120uint32_t msm_framebuffer_iova(struct drm_framebuffer *fb, int id, int plane)
 
121{
122	struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
123	if (!msm_fb->planes[plane])
124		return 0;
125	return msm_gem_iova(msm_fb->planes[plane], id) + fb->offsets[plane];
126}
127
128struct 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
134const 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
140struct drm_framebuffer *msm_framebuffer_create(struct drm_device *dev,
141		struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd)
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++) {
148		bos[i] = drm_gem_object_lookup(dev, file,
149				mode_cmd->handles[i]);
150		if (!bos[i]) {
151			ret = -ENXIO;
152			goto out_unref;
153		}
154	}
155
156	fb = msm_framebuffer_init(dev, mode_cmd, bos);
157	if (IS_ERR(fb)) {
158		ret = PTR_ERR(fb);
159		goto out_unref;
160	}
161
162	return fb;
163
164out_unref:
165	for (i = 0; i < n; i++)
166		drm_gem_object_unreference_unlocked(bos[i]);
167	return ERR_PTR(ret);
168}
169
170struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev,
171		const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)
172{
 
 
173	struct msm_drm_private *priv = dev->dev_private;
174	struct msm_kms *kms = priv->kms;
175	struct msm_framebuffer *msm_fb = NULL;
176	struct drm_framebuffer *fb;
177	const struct msm_format *format;
178	int ret, i, n;
179	unsigned int hsub, vsub;
180
181	DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)",
182			dev, mode_cmd, mode_cmd->width, mode_cmd->height,
183			(char *)&mode_cmd->pixel_format);
184
185	n = drm_format_num_planes(mode_cmd->pixel_format);
186	hsub = drm_format_horz_chroma_subsampling(mode_cmd->pixel_format);
187	vsub = drm_format_vert_chroma_subsampling(mode_cmd->pixel_format);
188
189	format = kms->funcs->get_format(kms, mode_cmd->pixel_format);
190	if (!format) {
191		dev_err(dev->dev, "unsupported pixel format: %4.4s\n",
192				(char *)&mode_cmd->pixel_format);
193		ret = -EINVAL;
194		goto fail;
195	}
196
197	msm_fb = kzalloc(sizeof(*msm_fb), GFP_KERNEL);
198	if (!msm_fb) {
199		ret = -ENOMEM;
200		goto fail;
201	}
202
203	fb = &msm_fb->base;
204
205	msm_fb->format = format;
206
207	if (n > ARRAY_SIZE(msm_fb->planes)) {
208		ret = -EINVAL;
209		goto fail;
210	}
211
212	for (i = 0; i < n; i++) {
213		unsigned int width = mode_cmd->width / (i ? hsub : 1);
214		unsigned int height = mode_cmd->height / (i ? vsub : 1);
215		unsigned int min_size;
216
217		min_size = (height - 1) * mode_cmd->pitches[i]
218			 + width * drm_format_plane_cpp(mode_cmd->pixel_format, i)
219			 + mode_cmd->offsets[i];
220
221		if (bos[i]->size < min_size) {
222			ret = -EINVAL;
223			goto fail;
224		}
225
226		msm_fb->planes[i] = bos[i];
227	}
228
229	drm_helper_mode_fill_fb_struct(fb, mode_cmd);
230
231	ret = drm_framebuffer_init(dev, fb, &msm_framebuffer_funcs);
232	if (ret) {
233		dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
234		goto fail;
235	}
236
237	DBG("create: FB ID: %d (%p)", fb->base.id, fb);
 
 
238
239	return fb;
240
241fail:
242	kfree(msm_fb);
243
244	return ERR_PTR(ret);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
245}
v6.2
  1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * Copyright (C) 2013 Red Hat
  4 * Author: Rob Clark <robdclark@gmail.com>
 
 
 
 
 
 
 
 
 
 
 
 
  5 */
  6
  7#include <drm/drm_crtc.h>
  8#include <drm/drm_damage_helper.h>
  9#include <drm/drm_file.h>
 10#include <drm/drm_fourcc.h>
 11#include <drm/drm_framebuffer.h>
 12#include <drm/drm_gem_framebuffer_helper.h>
 13#include <drm/drm_probe_helper.h>
 14
 15#include "msm_drv.h"
 16#include "msm_kms.h"
 17#include "msm_gem.h"
 
 
 18
 19struct msm_framebuffer {
 20	struct drm_framebuffer base;
 21	const struct msm_format *format;
 22
 23	/* Count of # of attached planes which need dirtyfb: */
 24	refcount_t dirtyfb;
 25
 26	/* Framebuffer per-plane address, if pinned, else zero: */
 27	uint64_t iova[DRM_FORMAT_MAX_PLANES];
 28	atomic_t prepare_count;
 29};
 30#define to_msm_framebuffer(x) container_of(x, struct msm_framebuffer, base)
 31
 32static struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev,
 33		const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos);
 34
 35static int msm_framebuffer_dirtyfb(struct drm_framebuffer *fb,
 36				   struct drm_file *file_priv, unsigned int flags,
 37				   unsigned int color, struct drm_clip_rect *clips,
 38				   unsigned int num_clips)
 
 
 
 
 
 
 39{
 40	struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
 
 
 
 
 
 41
 42	/* If this fb is not used on any display requiring pixel data to be
 43	 * flushed, then skip dirtyfb
 44	 */
 45	if (refcount_read(&msm_fb->dirtyfb) == 1)
 46		return 0;
 
 
 
 47
 48	return drm_atomic_helper_dirtyfb(fb, file_priv, flags, color,
 49					 clips, num_clips);
 
 
 
 50}
 51
 52static const struct drm_framebuffer_funcs msm_framebuffer_funcs = {
 53	.create_handle = drm_gem_fb_create_handle,
 54	.destroy = drm_gem_fb_destroy,
 55	.dirty = msm_framebuffer_dirtyfb,
 56};
 57
 58#ifdef CONFIG_DEBUG_FS
 59void msm_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
 60{
 61	struct msm_gem_stats stats = {};
 62	int i, n = fb->format->num_planes;
 63
 64	seq_printf(m, "fb: %dx%d@%4.4s (%2d, ID:%d)\n",
 65			fb->width, fb->height, (char *)&fb->format->format,
 66			drm_framebuffer_read_refcount(fb), fb->base.id);
 67
 68	for (i = 0; i < n; i++) {
 69		seq_printf(m, "   %d: offset=%d pitch=%d, obj: ",
 70				i, fb->offsets[i], fb->pitches[i]);
 71		msm_gem_describe(fb->obj[i], m, &stats);
 72	}
 73}
 74#endif
 75
 76/* prepare/pin all the fb's bo's for scanout.
 
 
 
 77 */
 78int msm_framebuffer_prepare(struct drm_framebuffer *fb,
 79		struct msm_gem_address_space *aspace,
 80		bool needs_dirtyfb)
 81{
 82	struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
 83	int ret, i, n = fb->format->num_planes;
 84
 85	if (needs_dirtyfb)
 86		refcount_inc(&msm_fb->dirtyfb);
 87
 88	atomic_inc(&msm_fb->prepare_count);
 89
 90	for (i = 0; i < n; i++) {
 91		ret = msm_gem_get_and_pin_iova(fb->obj[i], aspace, &msm_fb->iova[i]);
 92		drm_dbg_state(fb->dev, "FB[%u]: iova[%d]: %08llx (%d)",
 93			      fb->base.id, i, msm_fb->iova[i], ret);
 94		if (ret)
 95			return ret;
 96	}
 97
 98	return 0;
 99}
100
101void msm_framebuffer_cleanup(struct drm_framebuffer *fb,
102		struct msm_gem_address_space *aspace,
103		bool needed_dirtyfb)
104{
105	struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
106	int i, n = fb->format->num_planes;
107
108	if (needed_dirtyfb)
109		refcount_dec(&msm_fb->dirtyfb);
110
111	for (i = 0; i < n; i++)
112		msm_gem_unpin_iova(fb->obj[i], aspace);
113
114	if (!atomic_dec_return(&msm_fb->prepare_count))
115		memset(msm_fb->iova, 0, sizeof(msm_fb->iova));
116}
117
118uint32_t msm_framebuffer_iova(struct drm_framebuffer *fb,
119		struct msm_gem_address_space *aspace, int plane)
120{
121	struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
122	return msm_fb->iova[plane] + fb->offsets[plane];
 
 
123}
124
125struct drm_gem_object *msm_framebuffer_bo(struct drm_framebuffer *fb, int plane)
126{
127	return drm_gem_fb_get_obj(fb, plane);
 
128}
129
130const struct msm_format *msm_framebuffer_format(struct drm_framebuffer *fb)
131{
132	struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
133	return msm_fb->format;
134}
135
136struct drm_framebuffer *msm_framebuffer_create(struct drm_device *dev,
137		struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd)
138{
139	const struct drm_format_info *info = drm_get_format_info(dev,
140								 mode_cmd);
141	struct drm_gem_object *bos[4] = {0};
142	struct drm_framebuffer *fb;
143	int ret, i, n = info->num_planes;
144
145	for (i = 0; i < n; i++) {
146		bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]);
 
147		if (!bos[i]) {
148			ret = -ENXIO;
149			goto out_unref;
150		}
151	}
152
153	fb = msm_framebuffer_init(dev, mode_cmd, bos);
154	if (IS_ERR(fb)) {
155		ret = PTR_ERR(fb);
156		goto out_unref;
157	}
158
159	return fb;
160
161out_unref:
162	for (i = 0; i < n; i++)
163		drm_gem_object_put(bos[i]);
164	return ERR_PTR(ret);
165}
166
167static struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev,
168		const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)
169{
170	const struct drm_format_info *info = drm_get_format_info(dev,
171								 mode_cmd);
172	struct msm_drm_private *priv = dev->dev_private;
173	struct msm_kms *kms = priv->kms;
174	struct msm_framebuffer *msm_fb = NULL;
175	struct drm_framebuffer *fb;
176	const struct msm_format *format;
177	int ret, i, n;
 
178
179	drm_dbg_state(dev, "create framebuffer: mode_cmd=%p (%dx%d@%4.4s)",
180			mode_cmd, mode_cmd->width, mode_cmd->height,
181			(char *)&mode_cmd->pixel_format);
182
183	n = info->num_planes;
184	format = kms->funcs->get_format(kms, mode_cmd->pixel_format,
185			mode_cmd->modifier[0]);
 
 
186	if (!format) {
187		DRM_DEV_ERROR(dev->dev, "unsupported pixel format: %4.4s\n",
188				(char *)&mode_cmd->pixel_format);
189		ret = -EINVAL;
190		goto fail;
191	}
192
193	msm_fb = kzalloc(sizeof(*msm_fb), GFP_KERNEL);
194	if (!msm_fb) {
195		ret = -ENOMEM;
196		goto fail;
197	}
198
199	fb = &msm_fb->base;
200
201	msm_fb->format = format;
202
203	if (n > ARRAY_SIZE(fb->obj)) {
204		ret = -EINVAL;
205		goto fail;
206	}
207
208	for (i = 0; i < n; i++) {
209		unsigned int width = mode_cmd->width / (i ? info->hsub : 1);
210		unsigned int height = mode_cmd->height / (i ? info->vsub : 1);
211		unsigned int min_size;
212
213		min_size = (height - 1) * mode_cmd->pitches[i]
214			 + width * info->cpp[i]
215			 + mode_cmd->offsets[i];
216
217		if (bos[i]->size < min_size) {
218			ret = -EINVAL;
219			goto fail;
220		}
221
222		msm_fb->base.obj[i] = bos[i];
223	}
224
225	drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
226
227	ret = drm_framebuffer_init(dev, fb, &msm_framebuffer_funcs);
228	if (ret) {
229		DRM_DEV_ERROR(dev->dev, "framebuffer init failed: %d\n", ret);
230		goto fail;
231	}
232
233	refcount_set(&msm_fb->dirtyfb, 1);
234
235	drm_dbg_state(dev, "create: FB ID: %d (%p)", fb->base.id, fb);
236
237	return fb;
238
239fail:
240	kfree(msm_fb);
241
242	return ERR_PTR(ret);
243}
244
245struct drm_framebuffer *
246msm_alloc_stolen_fb(struct drm_device *dev, int w, int h, int p, uint32_t format)
247{
248	struct drm_mode_fb_cmd2 mode_cmd = {
249		.pixel_format = format,
250		.width = w,
251		.height = h,
252		.pitches = { p },
253	};
254	struct drm_gem_object *bo;
255	struct drm_framebuffer *fb;
256	int size;
257
258	/* allocate backing bo */
259	size = mode_cmd.pitches[0] * mode_cmd.height;
260	DBG("allocating %d bytes for fb %d", size, dev->primary->index);
261	bo = msm_gem_new(dev, size, MSM_BO_SCANOUT | MSM_BO_WC | MSM_BO_STOLEN);
262	if (IS_ERR(bo)) {
263		dev_warn(dev->dev, "could not allocate stolen bo\n");
264		/* try regular bo: */
265		bo = msm_gem_new(dev, size, MSM_BO_SCANOUT | MSM_BO_WC);
266	}
267	if (IS_ERR(bo)) {
268		DRM_DEV_ERROR(dev->dev, "failed to allocate buffer object\n");
269		return ERR_CAST(bo);
270	}
271
272	msm_gem_object_set_name(bo, "stolenfb");
273
274	fb = msm_framebuffer_init(dev, &mode_cmd, &bo);
275	if (IS_ERR(fb)) {
276		DRM_DEV_ERROR(dev->dev, "failed to allocate fb\n");
277		/* note: if fb creation failed, we can't rely on fb destroy
278		 * to unref the bo:
279		 */
280		drm_gem_object_put(bo);
281		return ERR_CAST(fb);
282	}
283
284	return fb;
285}