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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
4 * Author: Rob Clark <rob@ti.com>
5 */
6
7#include <linux/dma-mapping.h>
8
9#include <drm/drm_modeset_helper.h>
10#include <drm/drm_fourcc.h>
11#include <drm/drm_gem_framebuffer_helper.h>
12
13#include "omap_dmm_tiler.h"
14#include "omap_drv.h"
15
16/*
17 * framebuffer funcs
18 */
19
20static const u32 formats[] = {
21 /* 16bpp [A]RGB: */
22 DRM_FORMAT_RGB565, /* RGB16-565 */
23 DRM_FORMAT_RGBX4444, /* RGB12x-4444 */
24 DRM_FORMAT_XRGB4444, /* xRGB12-4444 */
25 DRM_FORMAT_RGBA4444, /* RGBA12-4444 */
26 DRM_FORMAT_ARGB4444, /* ARGB16-4444 */
27 DRM_FORMAT_XRGB1555, /* xRGB15-1555 */
28 DRM_FORMAT_ARGB1555, /* ARGB16-1555 */
29 /* 24bpp RGB: */
30 DRM_FORMAT_RGB888, /* RGB24-888 */
31 /* 32bpp [A]RGB: */
32 DRM_FORMAT_RGBX8888, /* RGBx24-8888 */
33 DRM_FORMAT_XRGB8888, /* xRGB24-8888 */
34 DRM_FORMAT_RGBA8888, /* RGBA32-8888 */
35 DRM_FORMAT_ARGB8888, /* ARGB32-8888 */
36 /* YUV: */
37 DRM_FORMAT_NV12,
38 DRM_FORMAT_YUYV,
39 DRM_FORMAT_UYVY,
40};
41
42/* per-plane info for the fb: */
43struct plane {
44 dma_addr_t dma_addr;
45};
46
47#define to_omap_framebuffer(x) container_of(x, struct omap_framebuffer, base)
48
49struct omap_framebuffer {
50 struct drm_framebuffer base;
51 int pin_count;
52 const struct drm_format_info *format;
53 struct plane planes[2];
54 /* lock for pinning (pin_count and planes.dma_addr) */
55 struct mutex lock;
56};
57
58static int omap_framebuffer_dirty(struct drm_framebuffer *fb,
59 struct drm_file *file_priv,
60 unsigned flags, unsigned color,
61 struct drm_clip_rect *clips,
62 unsigned num_clips)
63{
64 struct drm_crtc *crtc;
65
66 drm_modeset_lock_all(fb->dev);
67
68 drm_for_each_crtc(crtc, fb->dev)
69 omap_crtc_flush(crtc);
70
71 drm_modeset_unlock_all(fb->dev);
72
73 return 0;
74}
75
76static const struct drm_framebuffer_funcs omap_framebuffer_funcs = {
77 .create_handle = drm_gem_fb_create_handle,
78 .dirty = omap_framebuffer_dirty,
79 .destroy = drm_gem_fb_destroy,
80};
81
82static u32 get_linear_addr(struct drm_framebuffer *fb,
83 const struct drm_format_info *format, int n, int x, int y)
84{
85 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
86 struct plane *plane = &omap_fb->planes[n];
87 u32 offset;
88
89 offset = fb->offsets[n]
90 + (x * format->cpp[n] / (n == 0 ? 1 : format->hsub))
91 + (y * fb->pitches[n] / (n == 0 ? 1 : format->vsub));
92
93 return plane->dma_addr + offset;
94}
95
96bool omap_framebuffer_supports_rotation(struct drm_framebuffer *fb)
97{
98 return omap_gem_flags(fb->obj[0]) & OMAP_BO_TILED;
99}
100
101/* Note: DRM rotates counter-clockwise, TILER & DSS rotates clockwise */
102static u32 drm_rotation_to_tiler(unsigned int drm_rot)
103{
104 u32 orient;
105
106 switch (drm_rot & DRM_MODE_ROTATE_MASK) {
107 default:
108 case DRM_MODE_ROTATE_0:
109 orient = 0;
110 break;
111 case DRM_MODE_ROTATE_90:
112 orient = MASK_XY_FLIP | MASK_X_INVERT;
113 break;
114 case DRM_MODE_ROTATE_180:
115 orient = MASK_X_INVERT | MASK_Y_INVERT;
116 break;
117 case DRM_MODE_ROTATE_270:
118 orient = MASK_XY_FLIP | MASK_Y_INVERT;
119 break;
120 }
121
122 if (drm_rot & DRM_MODE_REFLECT_X)
123 orient ^= MASK_X_INVERT;
124
125 if (drm_rot & DRM_MODE_REFLECT_Y)
126 orient ^= MASK_Y_INVERT;
127
128 return orient;
129}
130
131/* update ovl info for scanout, handles cases of multi-planar fb's, etc.
132 */
133void omap_framebuffer_update_scanout(struct drm_framebuffer *fb,
134 struct drm_plane_state *state, struct omap_overlay_info *info)
135{
136 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
137 const struct drm_format_info *format = omap_fb->format;
138 struct plane *plane = &omap_fb->planes[0];
139 u32 x, y, orient = 0;
140
141 info->fourcc = fb->format->format;
142
143 info->pos_x = state->crtc_x;
144 info->pos_y = state->crtc_y;
145 info->out_width = state->crtc_w;
146 info->out_height = state->crtc_h;
147 info->width = state->src_w >> 16;
148 info->height = state->src_h >> 16;
149
150 /* DSS driver wants the w & h in rotated orientation */
151 if (drm_rotation_90_or_270(state->rotation))
152 swap(info->width, info->height);
153
154 x = state->src_x >> 16;
155 y = state->src_y >> 16;
156
157 if (omap_gem_flags(fb->obj[0]) & OMAP_BO_TILED) {
158 u32 w = state->src_w >> 16;
159 u32 h = state->src_h >> 16;
160
161 orient = drm_rotation_to_tiler(state->rotation);
162
163 /*
164 * omap_gem_rotated_paddr() wants the x & y in tiler units.
165 * Usually tiler unit size is the same as the pixel size, except
166 * for YUV422 formats, for which the tiler unit size is 32 bits
167 * and pixel size is 16 bits.
168 */
169 if (fb->format->format == DRM_FORMAT_UYVY ||
170 fb->format->format == DRM_FORMAT_YUYV) {
171 x /= 2;
172 w /= 2;
173 }
174
175 /* adjust x,y offset for invert: */
176 if (orient & MASK_Y_INVERT)
177 y += h - 1;
178 if (orient & MASK_X_INVERT)
179 x += w - 1;
180
181 /* Note: x and y are in TILER units, not pixels */
182 omap_gem_rotated_dma_addr(fb->obj[0], orient, x, y,
183 &info->paddr);
184 info->rotation_type = OMAP_DSS_ROT_TILER;
185 info->rotation = state->rotation ?: DRM_MODE_ROTATE_0;
186 /* Note: stride in TILER units, not pixels */
187 info->screen_width = omap_gem_tiled_stride(fb->obj[0], orient);
188 } else {
189 switch (state->rotation & DRM_MODE_ROTATE_MASK) {
190 case 0:
191 case DRM_MODE_ROTATE_0:
192 /* OK */
193 break;
194
195 default:
196 dev_warn(fb->dev->dev,
197 "rotation '%d' ignored for non-tiled fb\n",
198 state->rotation);
199 break;
200 }
201
202 info->paddr = get_linear_addr(fb, format, 0, x, y);
203 info->rotation_type = OMAP_DSS_ROT_NONE;
204 info->rotation = DRM_MODE_ROTATE_0;
205 info->screen_width = fb->pitches[0];
206 }
207
208 /* convert to pixels: */
209 info->screen_width /= format->cpp[0];
210
211 if (fb->format->format == DRM_FORMAT_NV12) {
212 plane = &omap_fb->planes[1];
213
214 if (info->rotation_type == OMAP_DSS_ROT_TILER) {
215 WARN_ON(!(omap_gem_flags(fb->obj[1]) & OMAP_BO_TILED));
216 omap_gem_rotated_dma_addr(fb->obj[1], orient, x/2, y/2,
217 &info->p_uv_addr);
218 } else {
219 info->p_uv_addr = get_linear_addr(fb, format, 1, x, y);
220 }
221 } else {
222 info->p_uv_addr = 0;
223 }
224}
225
226/* pin, prepare for scanout: */
227int omap_framebuffer_pin(struct drm_framebuffer *fb)
228{
229 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
230 int ret, i, n = fb->format->num_planes;
231
232 mutex_lock(&omap_fb->lock);
233
234 if (omap_fb->pin_count > 0) {
235 omap_fb->pin_count++;
236 mutex_unlock(&omap_fb->lock);
237 return 0;
238 }
239
240 for (i = 0; i < n; i++) {
241 struct plane *plane = &omap_fb->planes[i];
242 ret = omap_gem_pin(fb->obj[i], &plane->dma_addr);
243 if (ret)
244 goto fail;
245 omap_gem_dma_sync_buffer(fb->obj[i], DMA_TO_DEVICE);
246 }
247
248 omap_fb->pin_count++;
249
250 mutex_unlock(&omap_fb->lock);
251
252 return 0;
253
254fail:
255 for (i--; i >= 0; i--) {
256 struct plane *plane = &omap_fb->planes[i];
257 omap_gem_unpin(fb->obj[i]);
258 plane->dma_addr = 0;
259 }
260
261 mutex_unlock(&omap_fb->lock);
262
263 return ret;
264}
265
266/* unpin, no longer being scanned out: */
267void omap_framebuffer_unpin(struct drm_framebuffer *fb)
268{
269 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
270 int i, n = fb->format->num_planes;
271
272 mutex_lock(&omap_fb->lock);
273
274 omap_fb->pin_count--;
275
276 if (omap_fb->pin_count > 0) {
277 mutex_unlock(&omap_fb->lock);
278 return;
279 }
280
281 for (i = 0; i < n; i++) {
282 struct plane *plane = &omap_fb->planes[i];
283 omap_gem_unpin(fb->obj[i]);
284 plane->dma_addr = 0;
285 }
286
287 mutex_unlock(&omap_fb->lock);
288}
289
290#ifdef CONFIG_DEBUG_FS
291void omap_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
292{
293 int i, n = fb->format->num_planes;
294
295 seq_printf(m, "fb: %dx%d@%4.4s\n", fb->width, fb->height,
296 (char *)&fb->format->format);
297
298 for (i = 0; i < n; i++) {
299 seq_printf(m, " %d: offset=%d pitch=%d, obj: ",
300 i, fb->offsets[n], fb->pitches[i]);
301 omap_gem_describe(fb->obj[i], m);
302 }
303}
304#endif
305
306struct drm_framebuffer *omap_framebuffer_create(struct drm_device *dev,
307 struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd)
308{
309 const struct drm_format_info *info = drm_get_format_info(dev,
310 mode_cmd);
311 unsigned int num_planes = info->num_planes;
312 struct drm_gem_object *bos[4];
313 struct drm_framebuffer *fb;
314 int i;
315
316 for (i = 0; i < num_planes; i++) {
317 bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]);
318 if (!bos[i]) {
319 fb = ERR_PTR(-ENOENT);
320 goto error;
321 }
322 }
323
324 fb = omap_framebuffer_init(dev, mode_cmd, bos);
325 if (IS_ERR(fb))
326 goto error;
327
328 return fb;
329
330error:
331 while (--i >= 0)
332 drm_gem_object_put_unlocked(bos[i]);
333
334 return fb;
335}
336
337struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev,
338 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)
339{
340 const struct drm_format_info *format = NULL;
341 struct omap_framebuffer *omap_fb = NULL;
342 struct drm_framebuffer *fb = NULL;
343 unsigned int pitch = mode_cmd->pitches[0];
344 int ret, i;
345
346 DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)",
347 dev, mode_cmd, mode_cmd->width, mode_cmd->height,
348 (char *)&mode_cmd->pixel_format);
349
350 format = drm_get_format_info(dev, mode_cmd);
351
352 for (i = 0; i < ARRAY_SIZE(formats); i++) {
353 if (formats[i] == mode_cmd->pixel_format)
354 break;
355 }
356
357 if (!format || i == ARRAY_SIZE(formats)) {
358 dev_dbg(dev->dev, "unsupported pixel format: %4.4s\n",
359 (char *)&mode_cmd->pixel_format);
360 ret = -EINVAL;
361 goto fail;
362 }
363
364 omap_fb = kzalloc(sizeof(*omap_fb), GFP_KERNEL);
365 if (!omap_fb) {
366 ret = -ENOMEM;
367 goto fail;
368 }
369
370 fb = &omap_fb->base;
371 omap_fb->format = format;
372 mutex_init(&omap_fb->lock);
373
374 /*
375 * The code below assumes that no format use more than two planes, and
376 * that the two planes of multiplane formats need the same number of
377 * bytes per pixel.
378 */
379 if (format->num_planes == 2 && pitch != mode_cmd->pitches[1]) {
380 dev_dbg(dev->dev, "pitches differ between planes 0 and 1\n");
381 ret = -EINVAL;
382 goto fail;
383 }
384
385 if (pitch % format->cpp[0]) {
386 dev_dbg(dev->dev,
387 "buffer pitch (%u bytes) is not a multiple of pixel size (%u bytes)\n",
388 pitch, format->cpp[0]);
389 ret = -EINVAL;
390 goto fail;
391 }
392
393 for (i = 0; i < format->num_planes; i++) {
394 struct plane *plane = &omap_fb->planes[i];
395 unsigned int vsub = i == 0 ? 1 : format->vsub;
396 unsigned int size;
397
398 size = pitch * mode_cmd->height / vsub;
399
400 if (size > omap_gem_mmap_size(bos[i]) - mode_cmd->offsets[i]) {
401 dev_dbg(dev->dev,
402 "provided buffer object is too small! %zu < %d\n",
403 bos[i]->size - mode_cmd->offsets[i], size);
404 ret = -EINVAL;
405 goto fail;
406 }
407
408 fb->obj[i] = bos[i];
409 plane->dma_addr = 0;
410 }
411
412 drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
413
414 ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs);
415 if (ret) {
416 dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
417 goto fail;
418 }
419
420 DBG("create: FB ID: %d (%p)", fb->base.id, fb);
421
422 return fb;
423
424fail:
425 kfree(omap_fb);
426
427 return ERR_PTR(ret);
428}
1/*
2 * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
3 * Author: Rob Clark <rob@ti.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 <linux/seq_file.h>
19
20#include <drm/drm_crtc.h>
21#include <drm/drm_crtc_helper.h>
22
23#include "omap_dmm_tiler.h"
24#include "omap_drv.h"
25
26/*
27 * framebuffer funcs
28 */
29
30static const u32 formats[] = {
31 /* 16bpp [A]RGB: */
32 DRM_FORMAT_RGB565, /* RGB16-565 */
33 DRM_FORMAT_RGBX4444, /* RGB12x-4444 */
34 DRM_FORMAT_XRGB4444, /* xRGB12-4444 */
35 DRM_FORMAT_RGBA4444, /* RGBA12-4444 */
36 DRM_FORMAT_ARGB4444, /* ARGB16-4444 */
37 DRM_FORMAT_XRGB1555, /* xRGB15-1555 */
38 DRM_FORMAT_ARGB1555, /* ARGB16-1555 */
39 /* 24bpp RGB: */
40 DRM_FORMAT_RGB888, /* RGB24-888 */
41 /* 32bpp [A]RGB: */
42 DRM_FORMAT_RGBX8888, /* RGBx24-8888 */
43 DRM_FORMAT_XRGB8888, /* xRGB24-8888 */
44 DRM_FORMAT_RGBA8888, /* RGBA32-8888 */
45 DRM_FORMAT_ARGB8888, /* ARGB32-8888 */
46 /* YUV: */
47 DRM_FORMAT_NV12,
48 DRM_FORMAT_YUYV,
49 DRM_FORMAT_UYVY,
50};
51
52/* per-plane info for the fb: */
53struct plane {
54 struct drm_gem_object *bo;
55 u32 pitch;
56 u32 offset;
57 dma_addr_t dma_addr;
58};
59
60#define to_omap_framebuffer(x) container_of(x, struct omap_framebuffer, base)
61
62struct omap_framebuffer {
63 struct drm_framebuffer base;
64 int pin_count;
65 const struct drm_format_info *format;
66 struct plane planes[2];
67 /* lock for pinning (pin_count and planes.dma_addr) */
68 struct mutex lock;
69};
70
71static int omap_framebuffer_create_handle(struct drm_framebuffer *fb,
72 struct drm_file *file_priv,
73 unsigned int *handle)
74{
75 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
76 return drm_gem_handle_create(file_priv,
77 omap_fb->planes[0].bo, handle);
78}
79
80static void omap_framebuffer_destroy(struct drm_framebuffer *fb)
81{
82 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
83 int i, n = fb->format->num_planes;
84
85 DBG("destroy: FB ID: %d (%p)", fb->base.id, fb);
86
87 drm_framebuffer_cleanup(fb);
88
89 for (i = 0; i < n; i++) {
90 struct plane *plane = &omap_fb->planes[i];
91
92 drm_gem_object_unreference_unlocked(plane->bo);
93 }
94
95 kfree(omap_fb);
96}
97
98static const struct drm_framebuffer_funcs omap_framebuffer_funcs = {
99 .create_handle = omap_framebuffer_create_handle,
100 .destroy = omap_framebuffer_destroy,
101};
102
103static u32 get_linear_addr(struct plane *plane,
104 const struct drm_format_info *format, int n, int x, int y)
105{
106 u32 offset;
107
108 offset = plane->offset
109 + (x * format->cpp[n] / (n == 0 ? 1 : format->hsub))
110 + (y * plane->pitch / (n == 0 ? 1 : format->vsub));
111
112 return plane->dma_addr + offset;
113}
114
115bool omap_framebuffer_supports_rotation(struct drm_framebuffer *fb)
116{
117 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
118 struct plane *plane = &omap_fb->planes[0];
119
120 return omap_gem_flags(plane->bo) & OMAP_BO_TILED;
121}
122
123/* Note: DRM rotates counter-clockwise, TILER & DSS rotates clockwise */
124static u32 drm_rotation_to_tiler(unsigned int drm_rot)
125{
126 u32 orient;
127
128 switch (drm_rot & DRM_MODE_ROTATE_MASK) {
129 default:
130 case DRM_MODE_ROTATE_0:
131 orient = 0;
132 break;
133 case DRM_MODE_ROTATE_90:
134 orient = MASK_XY_FLIP | MASK_X_INVERT;
135 break;
136 case DRM_MODE_ROTATE_180:
137 orient = MASK_X_INVERT | MASK_Y_INVERT;
138 break;
139 case DRM_MODE_ROTATE_270:
140 orient = MASK_XY_FLIP | MASK_Y_INVERT;
141 break;
142 }
143
144 if (drm_rot & DRM_MODE_REFLECT_X)
145 orient ^= MASK_X_INVERT;
146
147 if (drm_rot & DRM_MODE_REFLECT_Y)
148 orient ^= MASK_Y_INVERT;
149
150 return orient;
151}
152
153/* update ovl info for scanout, handles cases of multi-planar fb's, etc.
154 */
155void omap_framebuffer_update_scanout(struct drm_framebuffer *fb,
156 struct drm_plane_state *state, struct omap_overlay_info *info)
157{
158 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
159 const struct drm_format_info *format = omap_fb->format;
160 struct plane *plane = &omap_fb->planes[0];
161 u32 x, y, orient = 0;
162
163 info->fourcc = fb->format->format;
164
165 info->pos_x = state->crtc_x;
166 info->pos_y = state->crtc_y;
167 info->out_width = state->crtc_w;
168 info->out_height = state->crtc_h;
169 info->width = state->src_w >> 16;
170 info->height = state->src_h >> 16;
171
172 /* DSS driver wants the w & h in rotated orientation */
173 if (drm_rotation_90_or_270(state->rotation))
174 swap(info->width, info->height);
175
176 x = state->src_x >> 16;
177 y = state->src_y >> 16;
178
179 if (omap_gem_flags(plane->bo) & OMAP_BO_TILED) {
180 u32 w = state->src_w >> 16;
181 u32 h = state->src_h >> 16;
182
183 orient = drm_rotation_to_tiler(state->rotation);
184
185 /*
186 * omap_gem_rotated_paddr() wants the x & y in tiler units.
187 * Usually tiler unit size is the same as the pixel size, except
188 * for YUV422 formats, for which the tiler unit size is 32 bits
189 * and pixel size is 16 bits.
190 */
191 if (fb->format->format == DRM_FORMAT_UYVY ||
192 fb->format->format == DRM_FORMAT_YUYV) {
193 x /= 2;
194 w /= 2;
195 }
196
197 /* adjust x,y offset for invert: */
198 if (orient & MASK_Y_INVERT)
199 y += h - 1;
200 if (orient & MASK_X_INVERT)
201 x += w - 1;
202
203 /* Note: x and y are in TILER units, not pixels */
204 omap_gem_rotated_dma_addr(plane->bo, orient, x, y,
205 &info->paddr);
206 info->rotation_type = OMAP_DSS_ROT_TILER;
207 info->rotation = state->rotation ?: DRM_MODE_ROTATE_0;
208 /* Note: stride in TILER units, not pixels */
209 info->screen_width = omap_gem_tiled_stride(plane->bo, orient);
210 } else {
211 switch (state->rotation & DRM_MODE_ROTATE_MASK) {
212 case 0:
213 case DRM_MODE_ROTATE_0:
214 /* OK */
215 break;
216
217 default:
218 dev_warn(fb->dev->dev,
219 "rotation '%d' ignored for non-tiled fb\n",
220 state->rotation);
221 break;
222 }
223
224 info->paddr = get_linear_addr(plane, format, 0, x, y);
225 info->rotation_type = OMAP_DSS_ROT_NONE;
226 info->rotation = DRM_MODE_ROTATE_0;
227 info->screen_width = plane->pitch;
228 }
229
230 /* convert to pixels: */
231 info->screen_width /= format->cpp[0];
232
233 if (fb->format->format == DRM_FORMAT_NV12) {
234 plane = &omap_fb->planes[1];
235
236 if (info->rotation_type == OMAP_DSS_ROT_TILER) {
237 WARN_ON(!(omap_gem_flags(plane->bo) & OMAP_BO_TILED));
238 omap_gem_rotated_dma_addr(plane->bo, orient, x/2, y/2,
239 &info->p_uv_addr);
240 } else {
241 info->p_uv_addr = get_linear_addr(plane, format, 1, x, y);
242 }
243 } else {
244 info->p_uv_addr = 0;
245 }
246}
247
248/* pin, prepare for scanout: */
249int omap_framebuffer_pin(struct drm_framebuffer *fb)
250{
251 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
252 int ret, i, n = fb->format->num_planes;
253
254 mutex_lock(&omap_fb->lock);
255
256 if (omap_fb->pin_count > 0) {
257 omap_fb->pin_count++;
258 mutex_unlock(&omap_fb->lock);
259 return 0;
260 }
261
262 for (i = 0; i < n; i++) {
263 struct plane *plane = &omap_fb->planes[i];
264 ret = omap_gem_pin(plane->bo, &plane->dma_addr);
265 if (ret)
266 goto fail;
267 omap_gem_dma_sync_buffer(plane->bo, DMA_TO_DEVICE);
268 }
269
270 omap_fb->pin_count++;
271
272 mutex_unlock(&omap_fb->lock);
273
274 return 0;
275
276fail:
277 for (i--; i >= 0; i--) {
278 struct plane *plane = &omap_fb->planes[i];
279 omap_gem_unpin(plane->bo);
280 plane->dma_addr = 0;
281 }
282
283 mutex_unlock(&omap_fb->lock);
284
285 return ret;
286}
287
288/* unpin, no longer being scanned out: */
289void omap_framebuffer_unpin(struct drm_framebuffer *fb)
290{
291 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
292 int i, n = fb->format->num_planes;
293
294 mutex_lock(&omap_fb->lock);
295
296 omap_fb->pin_count--;
297
298 if (omap_fb->pin_count > 0) {
299 mutex_unlock(&omap_fb->lock);
300 return;
301 }
302
303 for (i = 0; i < n; i++) {
304 struct plane *plane = &omap_fb->planes[i];
305 omap_gem_unpin(plane->bo);
306 plane->dma_addr = 0;
307 }
308
309 mutex_unlock(&omap_fb->lock);
310}
311
312/* iterate thru all the connectors, returning ones that are attached
313 * to the same fb..
314 */
315struct drm_connector *omap_framebuffer_get_next_connector(
316 struct drm_framebuffer *fb, struct drm_connector *from)
317{
318 struct drm_device *dev = fb->dev;
319 struct list_head *connector_list = &dev->mode_config.connector_list;
320 struct drm_connector *connector = from;
321
322 if (!from)
323 return list_first_entry_or_null(connector_list, typeof(*from),
324 head);
325
326 list_for_each_entry_from(connector, connector_list, head) {
327 if (connector != from) {
328 struct drm_encoder *encoder = connector->encoder;
329 struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
330 if (crtc && crtc->primary->fb == fb)
331 return connector;
332
333 }
334 }
335
336 return NULL;
337}
338
339#ifdef CONFIG_DEBUG_FS
340void omap_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
341{
342 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
343 int i, n = fb->format->num_planes;
344
345 seq_printf(m, "fb: %dx%d@%4.4s\n", fb->width, fb->height,
346 (char *)&fb->format->format);
347
348 for (i = 0; i < n; i++) {
349 struct plane *plane = &omap_fb->planes[i];
350 seq_printf(m, " %d: offset=%d pitch=%d, obj: ",
351 i, plane->offset, plane->pitch);
352 omap_gem_describe(plane->bo, m);
353 }
354}
355#endif
356
357struct drm_framebuffer *omap_framebuffer_create(struct drm_device *dev,
358 struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd)
359{
360 unsigned int num_planes = drm_format_num_planes(mode_cmd->pixel_format);
361 struct drm_gem_object *bos[4];
362 struct drm_framebuffer *fb;
363 int i;
364
365 for (i = 0; i < num_planes; i++) {
366 bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]);
367 if (!bos[i]) {
368 fb = ERR_PTR(-ENOENT);
369 goto error;
370 }
371 }
372
373 fb = omap_framebuffer_init(dev, mode_cmd, bos);
374 if (IS_ERR(fb))
375 goto error;
376
377 return fb;
378
379error:
380 while (--i >= 0)
381 drm_gem_object_unreference_unlocked(bos[i]);
382
383 return fb;
384}
385
386struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev,
387 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)
388{
389 const struct drm_format_info *format = NULL;
390 struct omap_framebuffer *omap_fb = NULL;
391 struct drm_framebuffer *fb = NULL;
392 unsigned int pitch = mode_cmd->pitches[0];
393 int ret, i;
394
395 DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)",
396 dev, mode_cmd, mode_cmd->width, mode_cmd->height,
397 (char *)&mode_cmd->pixel_format);
398
399 format = drm_format_info(mode_cmd->pixel_format);
400
401 for (i = 0; i < ARRAY_SIZE(formats); i++) {
402 if (formats[i] == mode_cmd->pixel_format)
403 break;
404 }
405
406 if (!format || i == ARRAY_SIZE(formats)) {
407 dev_dbg(dev->dev, "unsupported pixel format: %4.4s\n",
408 (char *)&mode_cmd->pixel_format);
409 ret = -EINVAL;
410 goto fail;
411 }
412
413 omap_fb = kzalloc(sizeof(*omap_fb), GFP_KERNEL);
414 if (!omap_fb) {
415 ret = -ENOMEM;
416 goto fail;
417 }
418
419 fb = &omap_fb->base;
420 omap_fb->format = format;
421 mutex_init(&omap_fb->lock);
422
423 /*
424 * The code below assumes that no format use more than two planes, and
425 * that the two planes of multiplane formats need the same number of
426 * bytes per pixel.
427 */
428 if (format->num_planes == 2 && pitch != mode_cmd->pitches[1]) {
429 dev_dbg(dev->dev, "pitches differ between planes 0 and 1\n");
430 ret = -EINVAL;
431 goto fail;
432 }
433
434 if (pitch % format->cpp[0]) {
435 dev_dbg(dev->dev,
436 "buffer pitch (%u bytes) is not a multiple of pixel size (%u bytes)\n",
437 pitch, format->cpp[0]);
438 ret = -EINVAL;
439 goto fail;
440 }
441
442 for (i = 0; i < format->num_planes; i++) {
443 struct plane *plane = &omap_fb->planes[i];
444 unsigned int vsub = i == 0 ? 1 : format->vsub;
445 unsigned int size;
446
447 size = pitch * mode_cmd->height / vsub;
448
449 if (size > omap_gem_mmap_size(bos[i]) - mode_cmd->offsets[i]) {
450 dev_dbg(dev->dev,
451 "provided buffer object is too small! %zu < %d\n",
452 bos[i]->size - mode_cmd->offsets[i], size);
453 ret = -EINVAL;
454 goto fail;
455 }
456
457 plane->bo = bos[i];
458 plane->offset = mode_cmd->offsets[i];
459 plane->pitch = pitch;
460 plane->dma_addr = 0;
461 }
462
463 drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
464
465 ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs);
466 if (ret) {
467 dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
468 goto fail;
469 }
470
471 DBG("create: FB ID: %d (%p)", fb->base.id, fb);
472
473 return fb;
474
475fail:
476 kfree(omap_fb);
477
478 return ERR_PTR(ret);
479}