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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 "omap_drv.h"
21#include "omap_dmm_tiler.h"
22
23#include "drm_crtc.h"
24#include "drm_crtc_helper.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 const struct format *format;
90 struct plane planes[4];
91};
92
93static int omap_framebuffer_create_handle(struct drm_framebuffer *fb,
94 struct drm_file *file_priv,
95 unsigned int *handle)
96{
97 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
98 return drm_gem_handle_create(file_priv,
99 omap_fb->planes[0].bo, handle);
100}
101
102static void omap_framebuffer_destroy(struct drm_framebuffer *fb)
103{
104 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
105 int i, n = drm_format_num_planes(fb->pixel_format);
106
107 DBG("destroy: FB ID: %d (%p)", fb->base.id, fb);
108
109 drm_framebuffer_cleanup(fb);
110
111 for (i = 0; i < n; i++) {
112 struct plane *plane = &omap_fb->planes[i];
113 if (plane->bo)
114 drm_gem_object_unreference_unlocked(plane->bo);
115 }
116
117 kfree(omap_fb);
118}
119
120static int omap_framebuffer_dirty(struct drm_framebuffer *fb,
121 struct drm_file *file_priv, unsigned flags, unsigned color,
122 struct drm_clip_rect *clips, unsigned num_clips)
123{
124 int i;
125
126 drm_modeset_lock_all(fb->dev);
127
128 for (i = 0; i < num_clips; i++) {
129 omap_framebuffer_flush(fb, clips[i].x1, clips[i].y1,
130 clips[i].x2 - clips[i].x1,
131 clips[i].y2 - clips[i].y1);
132 }
133
134 drm_modeset_unlock_all(fb->dev);
135
136 return 0;
137}
138
139static const struct drm_framebuffer_funcs omap_framebuffer_funcs = {
140 .create_handle = omap_framebuffer_create_handle,
141 .destroy = omap_framebuffer_destroy,
142 .dirty = omap_framebuffer_dirty,
143};
144
145static uint32_t get_linear_addr(struct plane *plane,
146 const struct format *format, int n, int x, int y)
147{
148 uint32_t offset;
149
150 offset = plane->offset +
151 (x * format->planes[n].stride_bpp) +
152 (y * plane->pitch / format->planes[n].sub_y);
153
154 return plane->paddr + offset;
155}
156
157/* update ovl info for scanout, handles cases of multi-planar fb's, etc.
158 */
159void omap_framebuffer_update_scanout(struct drm_framebuffer *fb,
160 struct omap_drm_window *win, struct omap_overlay_info *info)
161{
162 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
163 const struct format *format = omap_fb->format;
164 struct plane *plane = &omap_fb->planes[0];
165 uint32_t x, y, orient = 0;
166
167 info->color_mode = format->dss_format;
168
169 info->pos_x = win->crtc_x;
170 info->pos_y = win->crtc_y;
171 info->out_width = win->crtc_w;
172 info->out_height = win->crtc_h;
173 info->width = win->src_w;
174 info->height = win->src_h;
175
176 x = win->src_x;
177 y = win->src_y;
178
179 if (omap_gem_flags(plane->bo) & OMAP_BO_TILED) {
180 uint32_t w = win->src_w;
181 uint32_t h = win->src_h;
182
183 switch (win->rotation & 0xf) {
184 default:
185 dev_err(fb->dev->dev, "invalid rotation: %02x",
186 (uint32_t)win->rotation);
187 /* fallthru to default to no rotation */
188 case 0:
189 case BIT(DRM_ROTATE_0):
190 orient = 0;
191 break;
192 case BIT(DRM_ROTATE_90):
193 orient = MASK_XY_FLIP | MASK_X_INVERT;
194 break;
195 case BIT(DRM_ROTATE_180):
196 orient = MASK_X_INVERT | MASK_Y_INVERT;
197 break;
198 case BIT(DRM_ROTATE_270):
199 orient = MASK_XY_FLIP | MASK_Y_INVERT;
200 break;
201 }
202
203 if (win->rotation & BIT(DRM_REFLECT_X))
204 orient ^= MASK_X_INVERT;
205
206 if (win->rotation & BIT(DRM_REFLECT_Y))
207 orient ^= MASK_Y_INVERT;
208
209 /* adjust x,y offset for flip/invert: */
210 if (orient & MASK_XY_FLIP)
211 swap(w, h);
212 if (orient & MASK_Y_INVERT)
213 y += h - 1;
214 if (orient & MASK_X_INVERT)
215 x += w - 1;
216
217 omap_gem_rotated_paddr(plane->bo, orient, x, y, &info->paddr);
218 info->rotation_type = OMAP_DSS_ROT_TILER;
219 info->screen_width = omap_gem_tiled_stride(plane->bo, orient);
220 } else {
221 switch (win->rotation & 0xf) {
222 case 0:
223 case BIT(DRM_ROTATE_0):
224 /* OK */
225 break;
226
227 default:
228 dev_warn(fb->dev->dev,
229 "rotation '%d' ignored for non-tiled fb\n",
230 win->rotation);
231 win->rotation = 0;
232 break;
233 }
234
235 info->paddr = get_linear_addr(plane, format, 0, x, y);
236 info->rotation_type = OMAP_DSS_ROT_DMA;
237 info->screen_width = plane->pitch;
238 }
239
240 /* convert to pixels: */
241 info->screen_width /= format->planes[0].stride_bpp;
242
243 if (format->dss_format == OMAP_DSS_COLOR_NV12) {
244 plane = &omap_fb->planes[1];
245
246 if (info->rotation_type == OMAP_DSS_ROT_TILER) {
247 WARN_ON(!(omap_gem_flags(plane->bo) & OMAP_BO_TILED));
248 omap_gem_rotated_paddr(plane->bo, orient,
249 x/2, y/2, &info->p_uv_addr);
250 } else {
251 info->p_uv_addr = get_linear_addr(plane, format, 1, x, y);
252 }
253 } else {
254 info->p_uv_addr = 0;
255 }
256}
257
258/* pin, prepare for scanout: */
259int omap_framebuffer_pin(struct drm_framebuffer *fb)
260{
261 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
262 int ret, i, n = drm_format_num_planes(fb->pixel_format);
263
264 for (i = 0; i < n; i++) {
265 struct plane *plane = &omap_fb->planes[i];
266 ret = omap_gem_get_paddr(plane->bo, &plane->paddr, true);
267 if (ret)
268 goto fail;
269 omap_gem_dma_sync(plane->bo, DMA_TO_DEVICE);
270 }
271
272 return 0;
273
274fail:
275 for (i--; i >= 0; i--) {
276 struct plane *plane = &omap_fb->planes[i];
277 omap_gem_put_paddr(plane->bo);
278 plane->paddr = 0;
279 }
280
281 return ret;
282}
283
284/* unpin, no longer being scanned out: */
285int omap_framebuffer_unpin(struct drm_framebuffer *fb)
286{
287 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
288 int ret, i, n = drm_format_num_planes(fb->pixel_format);
289
290 for (i = 0; i < n; i++) {
291 struct plane *plane = &omap_fb->planes[i];
292 ret = omap_gem_put_paddr(plane->bo);
293 if (ret)
294 goto fail;
295 plane->paddr = 0;
296 }
297
298 return 0;
299
300fail:
301 return ret;
302}
303
304struct drm_gem_object *omap_framebuffer_bo(struct drm_framebuffer *fb, int p)
305{
306 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
307 if (p >= drm_format_num_planes(fb->pixel_format))
308 return NULL;
309 return omap_fb->planes[p].bo;
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/* flush an area of the framebuffer (in case of manual update display that
340 * is not automatically flushed)
341 */
342void omap_framebuffer_flush(struct drm_framebuffer *fb,
343 int x, int y, int w, int h)
344{
345 struct drm_connector *connector = NULL;
346
347 VERB("flush: %d,%d %dx%d, fb=%p", x, y, w, h, fb);
348
349 while ((connector = omap_framebuffer_get_next_connector(fb, connector))) {
350 /* only consider connectors that are part of a chain */
351 if (connector->encoder && connector->encoder->crtc) {
352 /* TODO: maybe this should propagate thru the crtc who
353 * could do the coordinate translation..
354 */
355 struct drm_crtc *crtc = connector->encoder->crtc;
356 int cx = max(0, x - crtc->x);
357 int cy = max(0, y - crtc->y);
358 int cw = w + (x - crtc->x) - cx;
359 int ch = h + (y - crtc->y) - cy;
360
361 omap_connector_flush(connector, cx, cy, cw, ch);
362 }
363 }
364}
365
366#ifdef CONFIG_DEBUG_FS
367void omap_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
368{
369 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
370 int i, n = drm_format_num_planes(fb->pixel_format);
371
372 seq_printf(m, "fb: %dx%d@%4.4s\n", fb->width, fb->height,
373 (char *)&fb->pixel_format);
374
375 for (i = 0; i < n; i++) {
376 struct plane *plane = &omap_fb->planes[i];
377 seq_printf(m, " %d: offset=%d pitch=%d, obj: ",
378 i, plane->offset, plane->pitch);
379 omap_gem_describe(plane->bo, m);
380 }
381}
382#endif
383
384struct drm_framebuffer *omap_framebuffer_create(struct drm_device *dev,
385 struct drm_file *file, struct drm_mode_fb_cmd2 *mode_cmd)
386{
387 struct drm_gem_object *bos[4];
388 struct drm_framebuffer *fb;
389 int ret;
390
391 ret = objects_lookup(dev, file, mode_cmd->pixel_format,
392 bos, mode_cmd->handles);
393 if (ret)
394 return ERR_PTR(ret);
395
396 fb = omap_framebuffer_init(dev, mode_cmd, bos);
397 if (IS_ERR(fb)) {
398 int i, n = drm_format_num_planes(mode_cmd->pixel_format);
399 for (i = 0; i < n; i++)
400 drm_gem_object_unreference_unlocked(bos[i]);
401 return fb;
402 }
403 return fb;
404}
405
406struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev,
407 struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)
408{
409 struct omap_framebuffer *omap_fb;
410 struct drm_framebuffer *fb = NULL;
411 const struct format *format = NULL;
412 int ret, i, n = drm_format_num_planes(mode_cmd->pixel_format);
413
414 DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)",
415 dev, mode_cmd, mode_cmd->width, mode_cmd->height,
416 (char *)&mode_cmd->pixel_format);
417
418 for (i = 0; i < ARRAY_SIZE(formats); i++) {
419 if (formats[i].pixel_format == mode_cmd->pixel_format) {
420 format = &formats[i];
421 break;
422 }
423 }
424
425 if (!format) {
426 dev_err(dev->dev, "unsupported pixel format: %4.4s\n",
427 (char *)&mode_cmd->pixel_format);
428 ret = -EINVAL;
429 goto fail;
430 }
431
432 omap_fb = kzalloc(sizeof(*omap_fb), GFP_KERNEL);
433 if (!omap_fb) {
434 ret = -ENOMEM;
435 goto fail;
436 }
437
438 fb = &omap_fb->base;
439 omap_fb->format = format;
440
441 for (i = 0; i < n; i++) {
442 struct plane *plane = &omap_fb->planes[i];
443 int size, pitch = mode_cmd->pitches[i];
444
445 if (pitch < (mode_cmd->width * format->planes[i].stride_bpp)) {
446 dev_err(dev->dev, "provided buffer pitch is too small! %d < %d\n",
447 pitch, mode_cmd->width * format->planes[i].stride_bpp);
448 ret = -EINVAL;
449 goto fail;
450 }
451
452 size = pitch * mode_cmd->height / format->planes[i].sub_y;
453
454 if (size > (omap_gem_mmap_size(bos[i]) - mode_cmd->offsets[i])) {
455 dev_err(dev->dev, "provided buffer object is too small! %d < %d\n",
456 bos[i]->size - mode_cmd->offsets[i], size);
457 ret = -EINVAL;
458 goto fail;
459 }
460
461 plane->bo = bos[i];
462 plane->offset = mode_cmd->offsets[i];
463 plane->pitch = pitch;
464 plane->paddr = 0;
465 }
466
467 drm_helper_mode_fill_fb_struct(fb, mode_cmd);
468
469 ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs);
470 if (ret) {
471 dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
472 goto fail;
473 }
474
475 DBG("create: FB ID: %d (%p)", fb->base.id, fb);
476
477 return fb;
478
479fail:
480 if (fb)
481 omap_framebuffer_destroy(fb);
482
483 return ERR_PTR(ret);
484}