drm/radeon: add debugfs file for dma rings
[linux-3.10.git] / drivers / staging / omapdrm / omap_fb.c
1 /*
2  * drivers/staging/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: */
31 struct 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
41 static 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 */
64 uint32_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: */
78 struct 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
87 struct omap_framebuffer {
88         struct drm_framebuffer base;
89         const struct format *format;
90         struct plane planes[4];
91 };
92
93 static 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
102 static 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
120 static 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         for (i = 0; i < num_clips; i++) {
127                 omap_framebuffer_flush(fb, clips[i].x1, clips[i].y1,
128                                         clips[i].x2 - clips[i].x1,
129                                         clips[i].y2 - clips[i].y1);
130         }
131
132         return 0;
133 }
134
135 static const struct drm_framebuffer_funcs omap_framebuffer_funcs = {
136         .create_handle = omap_framebuffer_create_handle,
137         .destroy = omap_framebuffer_destroy,
138         .dirty = omap_framebuffer_dirty,
139 };
140
141 static uint32_t get_linear_addr(struct plane *plane,
142                 const struct format *format, int n, int x, int y)
143 {
144         uint32_t offset;
145
146         offset = plane->offset +
147                         (x * format->planes[n].stride_bpp) +
148                         (y * plane->pitch / format->planes[n].sub_y);
149
150         return plane->paddr + offset;
151 }
152
153 /* update ovl info for scanout, handles cases of multi-planar fb's, etc.
154  */
155 void omap_framebuffer_update_scanout(struct drm_framebuffer *fb,
156                 struct omap_drm_window *win, struct omap_overlay_info *info)
157 {
158         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
159         const struct format *format = omap_fb->format;
160         struct plane *plane = &omap_fb->planes[0];
161         uint32_t x, y, orient = 0;
162
163         info->color_mode = format->dss_format;
164
165         info->pos_x      = win->crtc_x;
166         info->pos_y      = win->crtc_y;
167         info->out_width  = win->crtc_w;
168         info->out_height = win->crtc_h;
169         info->width      = win->src_w;
170         info->height     = win->src_h;
171
172         x = win->src_x;
173         y = win->src_y;
174
175         if (omap_gem_flags(plane->bo) & OMAP_BO_TILED) {
176                 uint32_t w = win->src_w;
177                 uint32_t h = win->src_h;
178
179                 switch (win->rotation & 0xf) {
180                 default:
181                         dev_err(fb->dev->dev, "invalid rotation: %02x",
182                                         (uint32_t)win->rotation);
183                         /* fallthru to default to no rotation */
184                 case 0:
185                 case BIT(DRM_ROTATE_0):
186                         orient = 0;
187                         break;
188                 case BIT(DRM_ROTATE_90):
189                         orient = MASK_XY_FLIP | MASK_X_INVERT;
190                         break;
191                 case BIT(DRM_ROTATE_180):
192                         orient = MASK_X_INVERT | MASK_Y_INVERT;
193                         break;
194                 case BIT(DRM_ROTATE_270):
195                         orient = MASK_XY_FLIP | MASK_Y_INVERT;
196                         break;
197                 }
198
199                 if (win->rotation & BIT(DRM_REFLECT_X))
200                         orient ^= MASK_X_INVERT;
201
202                 if (win->rotation & BIT(DRM_REFLECT_Y))
203                         orient ^= MASK_Y_INVERT;
204
205                 /* adjust x,y offset for flip/invert: */
206                 if (orient & MASK_XY_FLIP)
207                         swap(w, h);
208                 if (orient & MASK_Y_INVERT)
209                         y += h - 1;
210                 if (orient & MASK_X_INVERT)
211                         x += w - 1;
212
213                 omap_gem_rotated_paddr(plane->bo, orient, x, y, &info->paddr);
214                 info->rotation_type = OMAP_DSS_ROT_TILER;
215                 info->screen_width  = omap_gem_tiled_stride(plane->bo, orient);
216         } else {
217                 info->paddr         = get_linear_addr(plane, format, 0, x, y);
218                 info->rotation_type = OMAP_DSS_ROT_DMA;
219                 info->screen_width  = plane->pitch;
220         }
221
222         /* convert to pixels: */
223         info->screen_width /= format->planes[0].stride_bpp;
224
225         if (format->dss_format == OMAP_DSS_COLOR_NV12) {
226                 plane = &omap_fb->planes[1];
227
228                 if (info->rotation_type == OMAP_DSS_ROT_TILER) {
229                         WARN_ON(!(omap_gem_flags(plane->bo) & OMAP_BO_TILED));
230                         omap_gem_rotated_paddr(plane->bo, orient,
231                                         x/2, y/2, &info->p_uv_addr);
232                 } else {
233                         info->p_uv_addr = get_linear_addr(plane, format, 1, x, y);
234                 }
235         } else {
236                 info->p_uv_addr = 0;
237         }
238 }
239
240 /* Call for unpin 'a' (if not NULL), and pin 'b' (if not NULL).  Although
241  * buffers to unpin are just pushed to the unpin fifo so that the
242  * caller can defer unpin until vblank.
243  *
244  * Note if this fails (ie. something went very wrong!), all buffers are
245  * unpinned, and the caller disables the overlay.  We could have tried
246  * to revert back to the previous set of pinned buffers but if things are
247  * hosed there is no guarantee that would succeed.
248  */
249 int omap_framebuffer_replace(struct drm_framebuffer *a,
250                 struct drm_framebuffer *b, void *arg,
251                 void (*unpin)(void *arg, struct drm_gem_object *bo))
252 {
253         int ret = 0, i, na, nb;
254         struct omap_framebuffer *ofba = to_omap_framebuffer(a);
255         struct omap_framebuffer *ofbb = to_omap_framebuffer(b);
256         uint32_t pinned_mask = 0;
257
258         na = a ? drm_format_num_planes(a->pixel_format) : 0;
259         nb = b ? drm_format_num_planes(b->pixel_format) : 0;
260
261         for (i = 0; i < max(na, nb); i++) {
262                 struct plane *pa, *pb;
263
264                 pa = (i < na) ? &ofba->planes[i] : NULL;
265                 pb = (i < nb) ? &ofbb->planes[i] : NULL;
266
267                 if (pa)
268                         unpin(arg, pa->bo);
269
270                 if (pb && !ret) {
271                         ret = omap_gem_get_paddr(pb->bo, &pb->paddr, true);
272                         if (!ret) {
273                                 omap_gem_dma_sync(pb->bo, DMA_TO_DEVICE);
274                                 pinned_mask |= (1 << i);
275                         }
276                 }
277         }
278
279         if (ret) {
280                 /* something went wrong.. unpin what has been pinned */
281                 for (i = 0; i < nb; i++) {
282                         if (pinned_mask & (1 << i)) {
283                                 struct plane *pb = &ofba->planes[i];
284                                 unpin(arg, pb->bo);
285                         }
286                 }
287         }
288
289         return ret;
290 }
291
292 struct drm_gem_object *omap_framebuffer_bo(struct drm_framebuffer *fb, int p)
293 {
294         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
295         if (p >= drm_format_num_planes(fb->pixel_format))
296                 return NULL;
297         return omap_fb->planes[p].bo;
298 }
299
300 /* iterate thru all the connectors, returning ones that are attached
301  * to the same fb..
302  */
303 struct drm_connector *omap_framebuffer_get_next_connector(
304                 struct drm_framebuffer *fb, struct drm_connector *from)
305 {
306         struct drm_device *dev = fb->dev;
307         struct list_head *connector_list = &dev->mode_config.connector_list;
308         struct drm_connector *connector = from;
309
310         if (!from)
311                 return list_first_entry(connector_list, typeof(*from), head);
312
313         list_for_each_entry_from(connector, connector_list, head) {
314                 if (connector != from) {
315                         struct drm_encoder *encoder = connector->encoder;
316                         struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
317                         if (crtc && crtc->fb == fb)
318                                 return connector;
319
320                 }
321         }
322
323         return NULL;
324 }
325
326 /* flush an area of the framebuffer (in case of manual update display that
327  * is not automatically flushed)
328  */
329 void omap_framebuffer_flush(struct drm_framebuffer *fb,
330                 int x, int y, int w, int h)
331 {
332         struct drm_connector *connector = NULL;
333
334         VERB("flush: %d,%d %dx%d, fb=%p", x, y, w, h, fb);
335
336         while ((connector = omap_framebuffer_get_next_connector(fb, connector))) {
337                 /* only consider connectors that are part of a chain */
338                 if (connector->encoder && connector->encoder->crtc) {
339                         /* TODO: maybe this should propagate thru the crtc who
340                          * could do the coordinate translation..
341                          */
342                         struct drm_crtc *crtc = connector->encoder->crtc;
343                         int cx = max(0, x - crtc->x);
344                         int cy = max(0, y - crtc->y);
345                         int cw = w + (x - crtc->x) - cx;
346                         int ch = h + (y - crtc->y) - cy;
347
348                         omap_connector_flush(connector, cx, cy, cw, ch);
349                 }
350         }
351 }
352
353 #ifdef CONFIG_DEBUG_FS
354 void omap_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
355 {
356         struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
357         int i, n = drm_format_num_planes(fb->pixel_format);
358
359         seq_printf(m, "fb: %dx%d@%4.4s\n", fb->width, fb->height,
360                         (char *)&fb->pixel_format);
361
362         for (i = 0; i < n; i++) {
363                 struct plane *plane = &omap_fb->planes[i];
364                 seq_printf(m, "   %d: offset=%d pitch=%d, obj: ",
365                                 i, plane->offset, plane->pitch);
366                 omap_gem_describe(plane->bo, m);
367         }
368 }
369 #endif
370
371 struct drm_framebuffer *omap_framebuffer_create(struct drm_device *dev,
372                 struct drm_file *file, struct drm_mode_fb_cmd2 *mode_cmd)
373 {
374         struct drm_gem_object *bos[4];
375         struct drm_framebuffer *fb;
376         int ret;
377
378         ret = objects_lookup(dev, file, mode_cmd->pixel_format,
379                         bos, mode_cmd->handles);
380         if (ret)
381                 return ERR_PTR(ret);
382
383         fb = omap_framebuffer_init(dev, mode_cmd, bos);
384         if (IS_ERR(fb)) {
385                 int i, n = drm_format_num_planes(mode_cmd->pixel_format);
386                 for (i = 0; i < n; i++)
387                         drm_gem_object_unreference_unlocked(bos[i]);
388                 return fb;
389         }
390         return fb;
391 }
392
393 struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev,
394                 struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)
395 {
396         struct omap_framebuffer *omap_fb;
397         struct drm_framebuffer *fb = NULL;
398         const struct format *format = NULL;
399         int ret, i, n = drm_format_num_planes(mode_cmd->pixel_format);
400
401         DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)",
402                         dev, mode_cmd, mode_cmd->width, mode_cmd->height,
403                         (char *)&mode_cmd->pixel_format);
404
405         for (i = 0; i < ARRAY_SIZE(formats); i++) {
406                 if (formats[i].pixel_format == mode_cmd->pixel_format) {
407                         format = &formats[i];
408                         break;
409                 }
410         }
411
412         if (!format) {
413                 dev_err(dev->dev, "unsupported pixel format: %4.4s\n",
414                                 (char *)&mode_cmd->pixel_format);
415                 ret = -EINVAL;
416                 goto fail;
417         }
418
419         omap_fb = kzalloc(sizeof(*omap_fb), GFP_KERNEL);
420         if (!omap_fb) {
421                 dev_err(dev->dev, "could not allocate fb\n");
422                 ret = -ENOMEM;
423                 goto fail;
424         }
425
426         fb = &omap_fb->base;
427         ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs);
428         if (ret) {
429                 dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
430                 goto fail;
431         }
432
433         DBG("create: FB ID: %d (%p)", fb->base.id, fb);
434
435         omap_fb->format = format;
436
437         for (i = 0; i < n; i++) {
438                 struct plane *plane = &omap_fb->planes[i];
439                 int size, pitch = mode_cmd->pitches[i];
440
441                 if (pitch < (mode_cmd->width * format->planes[i].stride_bpp)) {
442                         dev_err(dev->dev, "provided buffer pitch is too small! %d < %d\n",
443                                         pitch, mode_cmd->width * format->planes[i].stride_bpp);
444                         ret = -EINVAL;
445                         goto fail;
446                 }
447
448                 size = pitch * mode_cmd->height / format->planes[i].sub_y;
449
450                 if (size > (omap_gem_mmap_size(bos[i]) - mode_cmd->offsets[i])) {
451                         dev_err(dev->dev, "provided buffer object is too small! %d < %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->paddr  = 0;
461         }
462
463         drm_helper_mode_fill_fb_struct(fb, mode_cmd);
464
465         return fb;
466
467 fail:
468         if (fb)
469                 omap_framebuffer_destroy(fb);
470
471         return ERR_PTR(ret);
472 }