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1/*
2 * drivers/gpu/drm/omapdrm/omap_fb.c
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
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
30/* per-format info: */
31struct format {
32 enum omap_color_mode dss_format;
33 uint32_t pixel_format;
34 struct {
35 int stride_bpp; /* this times width is stride */
36 int sub_y; /* sub-sample in y dimension */
37 } planes[4];
38 bool yuv;
39};
40
41static const struct format formats[] = {
42 /* 16bpp [A]RGB: */
43 { OMAP_DSS_COLOR_RGB16, DRM_FORMAT_RGB565, {{2, 1}}, false }, /* RGB16-565 */
44 { OMAP_DSS_COLOR_RGB12U, DRM_FORMAT_RGBX4444, {{2, 1}}, false }, /* RGB12x-4444 */
45 { OMAP_DSS_COLOR_RGBX16, DRM_FORMAT_XRGB4444, {{2, 1}}, false }, /* xRGB12-4444 */
46 { OMAP_DSS_COLOR_RGBA16, DRM_FORMAT_RGBA4444, {{2, 1}}, false }, /* RGBA12-4444 */
47 { OMAP_DSS_COLOR_ARGB16, DRM_FORMAT_ARGB4444, {{2, 1}}, false }, /* ARGB16-4444 */
48 { OMAP_DSS_COLOR_XRGB16_1555, DRM_FORMAT_XRGB1555, {{2, 1}}, false }, /* xRGB15-1555 */
49 { OMAP_DSS_COLOR_ARGB16_1555, DRM_FORMAT_ARGB1555, {{2, 1}}, false }, /* ARGB16-1555 */
50 /* 24bpp RGB: */
51 { OMAP_DSS_COLOR_RGB24P, DRM_FORMAT_RGB888, {{3, 1}}, false }, /* RGB24-888 */
52 /* 32bpp [A]RGB: */
53 { OMAP_DSS_COLOR_RGBX32, DRM_FORMAT_RGBX8888, {{4, 1}}, false }, /* RGBx24-8888 */
54 { OMAP_DSS_COLOR_RGB24U, DRM_FORMAT_XRGB8888, {{4, 1}}, false }, /* xRGB24-8888 */
55 { OMAP_DSS_COLOR_RGBA32, DRM_FORMAT_RGBA8888, {{4, 1}}, false }, /* RGBA32-8888 */
56 { OMAP_DSS_COLOR_ARGB32, DRM_FORMAT_ARGB8888, {{4, 1}}, false }, /* ARGB32-8888 */
57 /* YUV: */
58 { OMAP_DSS_COLOR_NV12, DRM_FORMAT_NV12, {{1, 1}, {1, 2}}, true },
59 { OMAP_DSS_COLOR_YUV2, DRM_FORMAT_YUYV, {{2, 1}}, true },
60 { OMAP_DSS_COLOR_UYVY, DRM_FORMAT_UYVY, {{2, 1}}, true },
61};
62
63/* convert from overlay's pixel formats bitmask to an array of fourcc's */
64uint32_t omap_framebuffer_get_formats(uint32_t *pixel_formats,
65 uint32_t max_formats, enum omap_color_mode supported_modes)
66{
67 uint32_t nformats = 0;
68 int i = 0;
69
70 for (i = 0; i < ARRAY_SIZE(formats) && nformats < max_formats; i++)
71 if (formats[i].dss_format & supported_modes)
72 pixel_formats[nformats++] = formats[i].pixel_format;
73
74 return nformats;
75}
76
77/* per-plane info for the fb: */
78struct plane {
79 struct drm_gem_object *bo;
80 uint32_t pitch;
81 uint32_t offset;
82 dma_addr_t paddr;
83};
84
85#define to_omap_framebuffer(x) container_of(x, struct omap_framebuffer, base)
86
87struct omap_framebuffer {
88 struct drm_framebuffer base;
89 int pin_count;
90 const struct format *format;
91 struct plane planes[4];
92 /* lock for pinning (pin_count and planes.paddr) */
93 struct mutex lock;
94};
95
96static int omap_framebuffer_create_handle(struct drm_framebuffer *fb,
97 struct drm_file *file_priv,
98 unsigned int *handle)
99{
100 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
101 return drm_gem_handle_create(file_priv,
102 omap_fb->planes[0].bo, handle);
103}
104
105static void omap_framebuffer_destroy(struct drm_framebuffer *fb)
106{
107 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
108 int i, n = drm_format_num_planes(fb->pixel_format);
109
110 DBG("destroy: FB ID: %d (%p)", fb->base.id, fb);
111
112 drm_framebuffer_cleanup(fb);
113
114 for (i = 0; i < n; i++) {
115 struct plane *plane = &omap_fb->planes[i];
116 if (plane->bo)
117 drm_gem_object_unreference_unlocked(plane->bo);
118 }
119
120 kfree(omap_fb);
121}
122
123static int omap_framebuffer_dirty(struct drm_framebuffer *fb,
124 struct drm_file *file_priv, unsigned flags, unsigned color,
125 struct drm_clip_rect *clips, unsigned num_clips)
126{
127 return 0;
128}
129
130static const struct drm_framebuffer_funcs omap_framebuffer_funcs = {
131 .create_handle = omap_framebuffer_create_handle,
132 .destroy = omap_framebuffer_destroy,
133 .dirty = omap_framebuffer_dirty,
134};
135
136static uint32_t get_linear_addr(struct plane *plane,
137 const struct format *format, int n, int x, int y)
138{
139 uint32_t offset;
140
141 offset = plane->offset +
142 (x * format->planes[n].stride_bpp) +
143 (y * plane->pitch / format->planes[n].sub_y);
144
145 return plane->paddr + offset;
146}
147
148bool omap_framebuffer_supports_rotation(struct drm_framebuffer *fb)
149{
150 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
151 struct plane *plane = &omap_fb->planes[0];
152
153 return omap_gem_flags(plane->bo) & OMAP_BO_TILED;
154}
155
156/* update ovl info for scanout, handles cases of multi-planar fb's, etc.
157 */
158void omap_framebuffer_update_scanout(struct drm_framebuffer *fb,
159 struct omap_drm_window *win, struct omap_overlay_info *info)
160{
161 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
162 const struct format *format = omap_fb->format;
163 struct plane *plane = &omap_fb->planes[0];
164 uint32_t x, y, orient = 0;
165
166 info->color_mode = format->dss_format;
167
168 info->pos_x = win->crtc_x;
169 info->pos_y = win->crtc_y;
170 info->out_width = win->crtc_w;
171 info->out_height = win->crtc_h;
172 info->width = win->src_w;
173 info->height = win->src_h;
174
175 x = win->src_x;
176 y = win->src_y;
177
178 if (omap_gem_flags(plane->bo) & OMAP_BO_TILED) {
179 uint32_t w = win->src_w;
180 uint32_t h = win->src_h;
181
182 switch (win->rotation & DRM_ROTATE_MASK) {
183 default:
184 dev_err(fb->dev->dev, "invalid rotation: %02x",
185 (uint32_t)win->rotation);
186 /* fallthru to default to no rotation */
187 case 0:
188 case BIT(DRM_ROTATE_0):
189 orient = 0;
190 break;
191 case BIT(DRM_ROTATE_90):
192 orient = MASK_XY_FLIP | MASK_X_INVERT;
193 break;
194 case BIT(DRM_ROTATE_180):
195 orient = MASK_X_INVERT | MASK_Y_INVERT;
196 break;
197 case BIT(DRM_ROTATE_270):
198 orient = MASK_XY_FLIP | MASK_Y_INVERT;
199 break;
200 }
201
202 if (win->rotation & BIT(DRM_REFLECT_X))
203 orient ^= MASK_X_INVERT;
204
205 if (win->rotation & BIT(DRM_REFLECT_Y))
206 orient ^= MASK_Y_INVERT;
207
208 /* adjust x,y offset for flip/invert: */
209 if (orient & MASK_XY_FLIP)
210 swap(w, h);
211 if (orient & MASK_Y_INVERT)
212 y += h - 1;
213 if (orient & MASK_X_INVERT)
214 x += w - 1;
215
216 omap_gem_rotated_paddr(plane->bo, orient, x, y, &info->paddr);
217 info->rotation_type = OMAP_DSS_ROT_TILER;
218 info->screen_width = omap_gem_tiled_stride(plane->bo, orient);
219 } else {
220 switch (win->rotation & DRM_ROTATE_MASK) {
221 case 0:
222 case BIT(DRM_ROTATE_0):
223 /* OK */
224 break;
225
226 default:
227 dev_warn(fb->dev->dev,
228 "rotation '%d' ignored for non-tiled fb\n",
229 win->rotation);
230 win->rotation = 0;
231 break;
232 }
233
234 info->paddr = get_linear_addr(plane, format, 0, x, y);
235 info->rotation_type = OMAP_DSS_ROT_DMA;
236 info->screen_width = plane->pitch;
237 }
238
239 /* convert to pixels: */
240 info->screen_width /= format->planes[0].stride_bpp;
241
242 if (format->dss_format == OMAP_DSS_COLOR_NV12) {
243 plane = &omap_fb->planes[1];
244
245 if (info->rotation_type == OMAP_DSS_ROT_TILER) {
246 WARN_ON(!(omap_gem_flags(plane->bo) & OMAP_BO_TILED));
247 omap_gem_rotated_paddr(plane->bo, orient,
248 x/2, y/2, &info->p_uv_addr);
249 } else {
250 info->p_uv_addr = get_linear_addr(plane, format, 1, x, y);
251 }
252 } else {
253 info->p_uv_addr = 0;
254 }
255}
256
257/* pin, prepare for scanout: */
258int omap_framebuffer_pin(struct drm_framebuffer *fb)
259{
260 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
261 int ret, i, n = drm_format_num_planes(fb->pixel_format);
262
263 mutex_lock(&omap_fb->lock);
264
265 if (omap_fb->pin_count > 0) {
266 omap_fb->pin_count++;
267 mutex_unlock(&omap_fb->lock);
268 return 0;
269 }
270
271 for (i = 0; i < n; i++) {
272 struct plane *plane = &omap_fb->planes[i];
273 ret = omap_gem_get_paddr(plane->bo, &plane->paddr, true);
274 if (ret)
275 goto fail;
276 omap_gem_dma_sync(plane->bo, DMA_TO_DEVICE);
277 }
278
279 omap_fb->pin_count++;
280
281 mutex_unlock(&omap_fb->lock);
282
283 return 0;
284
285fail:
286 for (i--; i >= 0; i--) {
287 struct plane *plane = &omap_fb->planes[i];
288 omap_gem_put_paddr(plane->bo);
289 plane->paddr = 0;
290 }
291
292 mutex_unlock(&omap_fb->lock);
293
294 return ret;
295}
296
297/* unpin, no longer being scanned out: */
298void omap_framebuffer_unpin(struct drm_framebuffer *fb)
299{
300 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
301 int i, n = drm_format_num_planes(fb->pixel_format);
302
303 mutex_lock(&omap_fb->lock);
304
305 omap_fb->pin_count--;
306
307 if (omap_fb->pin_count > 0) {
308 mutex_unlock(&omap_fb->lock);
309 return;
310 }
311
312 for (i = 0; i < n; i++) {
313 struct plane *plane = &omap_fb->planes[i];
314 omap_gem_put_paddr(plane->bo);
315 plane->paddr = 0;
316 }
317
318 mutex_unlock(&omap_fb->lock);
319}
320
321struct drm_gem_object *omap_framebuffer_bo(struct drm_framebuffer *fb, int p)
322{
323 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
324 if (p >= drm_format_num_planes(fb->pixel_format))
325 return NULL;
326 return omap_fb->planes[p].bo;
327}
328
329/* iterate thru all the connectors, returning ones that are attached
330 * to the same fb..
331 */
332struct drm_connector *omap_framebuffer_get_next_connector(
333 struct drm_framebuffer *fb, struct drm_connector *from)
334{
335 struct drm_device *dev = fb->dev;
336 struct list_head *connector_list = &dev->mode_config.connector_list;
337 struct drm_connector *connector = from;
338
339 if (!from)
340 return list_first_entry_or_null(connector_list, typeof(*from),
341 head);
342
343 list_for_each_entry_from(connector, connector_list, head) {
344 if (connector != from) {
345 struct drm_encoder *encoder = connector->encoder;
346 struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
347 if (crtc && crtc->primary->fb == fb)
348 return connector;
349
350 }
351 }
352
353 return NULL;
354}
355
356#ifdef CONFIG_DEBUG_FS
357void omap_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
358{
359 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
360 int i, n = drm_format_num_planes(fb->pixel_format);
361
362 seq_printf(m, "fb: %dx%d@%4.4s\n", fb->width, fb->height,
363 (char *)&fb->pixel_format);
364
365 for (i = 0; i < n; i++) {
366 struct plane *plane = &omap_fb->planes[i];
367 seq_printf(m, " %d: offset=%d pitch=%d, obj: ",
368 i, plane->offset, plane->pitch);
369 omap_gem_describe(plane->bo, m);
370 }
371}
372#endif
373
374struct drm_framebuffer *omap_framebuffer_create(struct drm_device *dev,
375 struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd)
376{
377 struct drm_gem_object *bos[4];
378 struct drm_framebuffer *fb;
379 int ret;
380
381 ret = objects_lookup(dev, file, mode_cmd->pixel_format,
382 bos, mode_cmd->handles);
383 if (ret)
384 return ERR_PTR(ret);
385
386 fb = omap_framebuffer_init(dev, mode_cmd, bos);
387 if (IS_ERR(fb)) {
388 int i, n = drm_format_num_planes(mode_cmd->pixel_format);
389 for (i = 0; i < n; i++)
390 drm_gem_object_unreference_unlocked(bos[i]);
391 return fb;
392 }
393 return fb;
394}
395
396struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev,
397 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)
398{
399 struct omap_framebuffer *omap_fb = NULL;
400 struct drm_framebuffer *fb = NULL;
401 const struct format *format = NULL;
402 int ret, i, n = drm_format_num_planes(mode_cmd->pixel_format);
403
404 DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)",
405 dev, mode_cmd, mode_cmd->width, mode_cmd->height,
406 (char *)&mode_cmd->pixel_format);
407
408 for (i = 0; i < ARRAY_SIZE(formats); i++) {
409 if (formats[i].pixel_format == mode_cmd->pixel_format) {
410 format = &formats[i];
411 break;
412 }
413 }
414
415 if (!format) {
416 dev_err(dev->dev, "unsupported pixel format: %4.4s\n",
417 (char *)&mode_cmd->pixel_format);
418 ret = -EINVAL;
419 goto fail;
420 }
421
422 omap_fb = kzalloc(sizeof(*omap_fb), GFP_KERNEL);
423 if (!omap_fb) {
424 ret = -ENOMEM;
425 goto fail;
426 }
427
428 fb = &omap_fb->base;
429 omap_fb->format = format;
430 mutex_init(&omap_fb->lock);
431
432 for (i = 0; i < n; i++) {
433 struct plane *plane = &omap_fb->planes[i];
434 int size, pitch = mode_cmd->pitches[i];
435
436 if (pitch < (mode_cmd->width * format->planes[i].stride_bpp)) {
437 dev_err(dev->dev, "provided buffer pitch is too small! %d < %d\n",
438 pitch, mode_cmd->width * format->planes[i].stride_bpp);
439 ret = -EINVAL;
440 goto fail;
441 }
442
443 if (pitch % format->planes[i].stride_bpp != 0) {
444 dev_err(dev->dev,
445 "buffer pitch (%d bytes) is not a multiple of pixel size (%d bytes)\n",
446 pitch, format->planes[i].stride_bpp);
447 ret = -EINVAL;
448 goto fail;
449 }
450
451 size = pitch * mode_cmd->height / format->planes[i].sub_y;
452
453 if (size > (omap_gem_mmap_size(bos[i]) - mode_cmd->offsets[i])) {
454 dev_err(dev->dev, "provided buffer object is too small! %d < %d\n",
455 bos[i]->size - mode_cmd->offsets[i], size);
456 ret = -EINVAL;
457 goto fail;
458 }
459
460 if (i > 0 && pitch != mode_cmd->pitches[i - 1]) {
461 dev_err(dev->dev,
462 "pitches are not the same between framebuffer planes %d != %d\n",
463 pitch, mode_cmd->pitches[i - 1]);
464 ret = -EINVAL;
465 goto fail;
466 }
467
468 plane->bo = bos[i];
469 plane->offset = mode_cmd->offsets[i];
470 plane->pitch = pitch;
471 plane->paddr = 0;
472 }
473
474 drm_helper_mode_fill_fb_struct(fb, mode_cmd);
475
476 ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs);
477 if (ret) {
478 dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
479 goto fail;
480 }
481
482 DBG("create: FB ID: %d (%p)", fb->base.id, fb);
483
484 return fb;
485
486fail:
487 kfree(omap_fb);
488
489 return ERR_PTR(ret);
490}