Loading...
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}
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
53 drm_gem_object_unreference_unlocked(bo);
54 }
55
56 kfree(msm_fb);
57}
58
59static const struct drm_framebuffer_funcs msm_framebuffer_funcs = {
60 .create_handle = msm_framebuffer_create_handle,
61 .destroy = msm_framebuffer_destroy,
62};
63
64#ifdef CONFIG_DEBUG_FS
65void msm_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
66{
67 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
68 int i, n = drm_format_num_planes(fb->pixel_format);
69
70 seq_printf(m, "fb: %dx%d@%4.4s (%2d, ID:%d)\n",
71 fb->width, fb->height, (char *)&fb->pixel_format,
72 drm_framebuffer_read_refcount(fb), fb->base.id);
73
74 for (i = 0; i < n; i++) {
75 seq_printf(m, " %d: offset=%d pitch=%d, obj: ",
76 i, fb->offsets[i], fb->pitches[i]);
77 msm_gem_describe(msm_fb->planes[i], m);
78 }
79}
80#endif
81
82/* prepare/pin all the fb's bo's for scanout. Note that it is not valid
83 * to prepare an fb more multiple different initiator 'id's. But that
84 * should be fine, since only the scanout (mdpN) side of things needs
85 * this, the gpu doesn't care about fb's.
86 */
87int msm_framebuffer_prepare(struct drm_framebuffer *fb, int id)
88{
89 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
90 int ret, i, n = drm_format_num_planes(fb->pixel_format);
91 uint64_t iova;
92
93 for (i = 0; i < n; i++) {
94 ret = msm_gem_get_iova(msm_fb->planes[i], id, &iova);
95 DBG("FB[%u]: iova[%d]: %08llx (%d)", fb->base.id, i, iova, ret);
96 if (ret)
97 return ret;
98 }
99
100 return 0;
101}
102
103void msm_framebuffer_cleanup(struct drm_framebuffer *fb, int id)
104{
105 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
106 int i, n = drm_format_num_planes(fb->pixel_format);
107
108 for (i = 0; i < n; i++)
109 msm_gem_put_iova(msm_fb->planes[i], id);
110}
111
112uint32_t msm_framebuffer_iova(struct drm_framebuffer *fb, int id, int plane)
113{
114 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
115 if (!msm_fb->planes[plane])
116 return 0;
117 return msm_gem_iova(msm_fb->planes[plane], id) + fb->offsets[plane];
118}
119
120struct drm_gem_object *msm_framebuffer_bo(struct drm_framebuffer *fb, int plane)
121{
122 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
123 return msm_fb->planes[plane];
124}
125
126const struct msm_format *msm_framebuffer_format(struct drm_framebuffer *fb)
127{
128 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
129 return msm_fb->format;
130}
131
132struct drm_framebuffer *msm_framebuffer_create(struct drm_device *dev,
133 struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd)
134{
135 struct drm_gem_object *bos[4] = {0};
136 struct drm_framebuffer *fb;
137 int ret, i, n = drm_format_num_planes(mode_cmd->pixel_format);
138
139 for (i = 0; i < n; i++) {
140 bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]);
141 if (!bos[i]) {
142 ret = -ENXIO;
143 goto out_unref;
144 }
145 }
146
147 fb = msm_framebuffer_init(dev, mode_cmd, bos);
148 if (IS_ERR(fb)) {
149 ret = PTR_ERR(fb);
150 goto out_unref;
151 }
152
153 return fb;
154
155out_unref:
156 for (i = 0; i < n; i++)
157 drm_gem_object_unreference_unlocked(bos[i]);
158 return ERR_PTR(ret);
159}
160
161struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev,
162 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)
163{
164 struct msm_drm_private *priv = dev->dev_private;
165 struct msm_kms *kms = priv->kms;
166 struct msm_framebuffer *msm_fb = NULL;
167 struct drm_framebuffer *fb;
168 const struct msm_format *format;
169 int ret, i, n;
170 unsigned int hsub, vsub;
171
172 DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)",
173 dev, mode_cmd, mode_cmd->width, mode_cmd->height,
174 (char *)&mode_cmd->pixel_format);
175
176 n = drm_format_num_planes(mode_cmd->pixel_format);
177 hsub = drm_format_horz_chroma_subsampling(mode_cmd->pixel_format);
178 vsub = drm_format_vert_chroma_subsampling(mode_cmd->pixel_format);
179
180 format = kms->funcs->get_format(kms, mode_cmd->pixel_format);
181 if (!format) {
182 dev_err(dev->dev, "unsupported pixel format: %4.4s\n",
183 (char *)&mode_cmd->pixel_format);
184 ret = -EINVAL;
185 goto fail;
186 }
187
188 msm_fb = kzalloc(sizeof(*msm_fb), GFP_KERNEL);
189 if (!msm_fb) {
190 ret = -ENOMEM;
191 goto fail;
192 }
193
194 fb = &msm_fb->base;
195
196 msm_fb->format = format;
197
198 if (n > ARRAY_SIZE(msm_fb->planes)) {
199 ret = -EINVAL;
200 goto fail;
201 }
202
203 for (i = 0; i < n; i++) {
204 unsigned int width = mode_cmd->width / (i ? hsub : 1);
205 unsigned int height = mode_cmd->height / (i ? vsub : 1);
206 unsigned int min_size;
207
208 min_size = (height - 1) * mode_cmd->pitches[i]
209 + width * drm_format_plane_cpp(mode_cmd->pixel_format, i)
210 + mode_cmd->offsets[i];
211
212 if (bos[i]->size < min_size) {
213 ret = -EINVAL;
214 goto fail;
215 }
216
217 msm_fb->planes[i] = bos[i];
218 }
219
220 drm_helper_mode_fill_fb_struct(fb, mode_cmd);
221
222 ret = drm_framebuffer_init(dev, fb, &msm_framebuffer_funcs);
223 if (ret) {
224 dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
225 goto fail;
226 }
227
228 DBG("create: FB ID: %d (%p)", fb->base.id, fb);
229
230 return fb;
231
232fail:
233 kfree(msm_fb);
234
235 return ERR_PTR(ret);
236}