35e9a3d43c1afe69281ec98889d77cd074a999b9
[glsdk/omapdrmtest.git] / util / display-kms.c
1 /*
2  * Copyright (C) 2011 Texas Instruments
3  * Author: Rob Clark <rob.clark@linaro.org>
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  */
18 #ifdef HAVE_CONFIG_H
19 #include "config.h"
20 #endif
22 #include "util.h"
24 #include <xf86drmMode.h>
27 /* NOTE: healthy dose of recycling from libdrm modetest app.. */
29 /*
30  * Mode setting with the kernel interfaces is a bit of a chore.
31  * First you have to find the connector in question and make sure the
32  * requested mode is available.
33  * Then you need to find the encoder attached to that connector so you
34  * can bind it with a free crtc.
35  */
36 struct connector {
37         uint32_t id;
38         char mode_str[64];
39         drmModeModeInfo *mode;
40         drmModeEncoder *encoder;
41         int crtc;
42         int pipe;
43 };
45 #define to_display_kms(x) container_of(x, struct display_kms, base)
46 struct display_kms {
47         struct display base;
49         uint32_t connectors_count;
50         struct connector connector[10];
51         drmModePlane *ovr[10];
53         int scheduled_flips, completed_flips;
54         uint32_t bo_flags;
55         drmModeResPtr resources;
56         drmModePlaneRes *plane_resources;
57         struct buffer *current;
58 };
60 #define to_buffer_kms(x) container_of(x, struct buffer_kms, base)
61 struct buffer_kms {
62         struct buffer base;
63         uint32_t fb_id;
64 };
66 static struct omap_bo *
67 alloc_bo(struct display *disp, uint32_t bpp, uint32_t width, uint32_t height,
68                 uint32_t *bo_handle, uint32_t *pitch)
69 {
70         struct display_kms *disp_kms = to_display_kms(disp);
71         struct omap_bo *bo;
72         uint32_t bo_flags = disp_kms->bo_flags;
74         if ((bo_flags & OMAP_BO_TILED) == OMAP_BO_TILED) {
75                 bo_flags &= ~OMAP_BO_TILED;
76                 if (bpp == 8) {
77                         bo_flags |= OMAP_BO_TILED_8;
78                 } else if (bpp == 16) {
79                         bo_flags |= OMAP_BO_TILED_16;
80                 } else if (bpp == 32) {
81                         bo_flags |= OMAP_BO_TILED_32;
82                 }
83         }
85         bo_flags |= OMAP_BO_WC;
87         if (bo_flags & OMAP_BO_TILED) {
88                 bo = omap_bo_new_tiled(disp->dev, width, height, bo_flags);
89         } else {
90                 bo = omap_bo_new(disp->dev, width * height * bpp / 8, bo_flags);
91         }
93         if (bo) {
94                 *bo_handle = omap_bo_handle(bo);
95                 *pitch = width * bpp / 8;
96         }
98         return bo;
99 }
101 static struct buffer *
102 alloc_buffer(struct display *disp, uint32_t fourcc, uint32_t w, uint32_t h)
104         struct buffer_kms *buf_kms;
105         struct buffer *buf;
106         uint32_t bo_handles[4] = {0}, offsets[4] = {0};
107         int ret;
109         buf_kms = calloc(1, sizeof(*buf_kms));
110         if (!buf_kms) {
111                 ERROR("allocation failed");
112                 return NULL;
113         }
114         buf = &buf_kms->base;
116         buf->fourcc = fourcc;
117         buf->width = w;
118         buf->height = h;
120         buf->nbo = 1;
122         if (!fourcc)
123                 fourcc = FOURCC('A','R','2','4');
125         switch(fourcc) {
126         case FOURCC('A','R','2','4'):
127                 buf->nbo = 1;
128                 buf->bo[0] = alloc_bo(disp, 32, buf->width, buf->height,
129                                 &bo_handles[0], &buf->pitches[0]);
130                 break;
131         case FOURCC('U','Y','V','Y'):
132         case FOURCC('Y','U','Y','V'):
133                 buf->nbo = 1;
134                 buf->bo[0] = alloc_bo(disp, 16, buf->width, buf->height,
135                                 &bo_handles[0], &buf->pitches[0]);
136                 break;
137         case FOURCC('N','V','1','2'):
138                 buf->nbo = 2;
139                 buf->bo[0] = alloc_bo(disp, 8, buf->width, buf->height,
140                                 &bo_handles[0], &buf->pitches[0]);
141                 buf->bo[1] = alloc_bo(disp, 16, buf->width/2, buf->height/2,
142                                 &bo_handles[1], &buf->pitches[1]);
143                 break;
144         case FOURCC('I','4','2','0'):
145                 buf->nbo = 3;
146                 buf->bo[0] = alloc_bo(disp, 8, buf->width, buf->height,
147                                 &bo_handles[0], &buf->pitches[0]);
148                 buf->bo[1] = alloc_bo(disp, 8, buf->width/2, buf->height/2,
149                                 &bo_handles[1], &buf->pitches[1]);
150                 buf->bo[2] = alloc_bo(disp, 8, buf->width/2, buf->height/2,
151                                 &bo_handles[2], &buf->pitches[2]);
152                 break;
153         default:
154                 ERROR("invalid format: 0x%08x", fourcc);
155                 goto fail;
156         }
158         ret = drmModeAddFB2(disp->fd, buf->width, buf->height, fourcc,
159                         bo_handles, buf->pitches, offsets, &buf_kms->fb_id, 0);
160         if (ret) {
161                 ERROR("drmModeAddFB2 failed: %s (%d)", strerror(errno), ret);
162                 goto fail;
163         }
165         return buf;
167 fail:
168         // XXX cleanup
169         return NULL;
172 static struct buffer **
173 alloc_buffers(struct display *disp, uint32_t n,
174                 uint32_t fourcc, uint32_t w, uint32_t h)
176         struct buffer **bufs;
177         uint32_t i = 0;
179         bufs = calloc(n, sizeof(*bufs));
180         if (!bufs) {
181                 ERROR("allocation failed");
182                 goto fail;
183         }
185         for (i = 0; i < n; i++) {
186                 bufs[i] = alloc_buffer(disp, fourcc, w, h);
187                 if (!bufs[i]) {
188                         ERROR("allocation failed");
189                         goto fail;
190                 }
191         }
193         return bufs;
195 fail:
196         // XXX cleanup
197         return NULL;
200 static struct buffer **
201 get_buffers(struct display *disp, uint32_t n)
203         return alloc_buffers(disp, n, 0, disp->width, disp->height);
206 static struct buffer **
207 get_vid_buffers(struct display *disp, uint32_t n,
208                 uint32_t fourcc, uint32_t w, uint32_t h)
210         return alloc_buffers(disp, n, fourcc, w, h);
213 static void
214 page_flip_handler(int fd, unsigned int frame,
215                 unsigned int sec, unsigned int usec, void *data)
217         struct display *disp = data;
218         struct display_kms *disp_kms = to_display_kms(disp);
220         disp_kms->completed_flips++;
222         MSG("Page flip: frame=%d, sec=%d, usec=%d, remaining=%d", frame, sec, usec,
223                         disp_kms->scheduled_flips - disp_kms->completed_flips);
226 static int
227 post_buffer(struct display *disp, struct buffer *buf)
229         struct display_kms *disp_kms = to_display_kms(disp);
230         struct buffer_kms *buf_kms = to_buffer_kms(buf);
231         int ret, last_err = 0, x = 0;
232         uint32_t i;
234         for (i = 0; i < disp_kms->connectors_count; i++) {
235                 struct connector *connector = &disp_kms->connector[i];
237                 if (! connector->mode) {
238                         continue;
239                 }
241                 if (! disp_kms->current) {
242                         /* first buffer we flip to, setup the mode (since this can't
243                          * be done earlier without a buffer to scanout)
244                          */
245                         MSG("Setting mode %s on connector %d, crtc %d",
246                                         connector->mode_str, connector->id, connector->crtc);
248                         ret = drmModeSetCrtc(disp->fd, connector->crtc, buf_kms->fb_id,
249                                         x, 0, &connector->id, 1, connector->mode);
251                         x += connector->mode->hdisplay;
252                 } else {
253                         ret = drmModePageFlip(disp->fd, connector->crtc, buf_kms->fb_id,
254                                         DRM_MODE_PAGE_FLIP_EVENT, disp);
255                         disp_kms->scheduled_flips++;
256                 }
258                 if (ret) {
259                         ERROR("Could not post buffer on crtc %d: %s (%d)",
260                                         connector->crtc, strerror(errno), ret);
261                         last_err = ret;
262                         /* well, keep trying the reset of the connectors.. */
263                 }
264         }
266         /* if we flipped, wait for all flips to complete! */
267         while (disp_kms->scheduled_flips > disp_kms->completed_flips) {
268                 drmEventContext evctx = {
269                                 .version = DRM_EVENT_CONTEXT_VERSION,
270                                 .page_flip_handler = page_flip_handler,
271                 };
272                 struct timeval timeout = {
273                                 .tv_sec = 3,
274                                 .tv_usec = 0,
275                 };
276                 fd_set fds;
278                 FD_ZERO(&fds);
279                 FD_SET(disp->fd, &fds);
281                 ret = select(disp->fd + 1, &fds, NULL, NULL, &timeout);
282                 if (ret <= 0) {
283                         if (errno == EAGAIN) {
284                                 continue;    /* keep going */
285                         } else {
286                                 ERROR("Timeout waiting for flip complete: %s (%d)",
287                                                 strerror(errno), ret);
288                                 last_err = ret;
289                                 break;
290                         }
291                 }
293                 drmHandleEvent(disp->fd, &evctx);
294         }
296         disp_kms->current = buf;
298         return last_err;
301 static int
302 post_vid_buffer(struct display *disp, struct buffer *buf,
303                 uint32_t x, uint32_t y, uint32_t w, uint32_t h)
305         struct display_kms *disp_kms = to_display_kms(disp);
306         struct buffer_kms *buf_kms = to_buffer_kms(buf);
307         int ret = 0;
308         uint32_t i, j;
310         /* ensure we have the overlay setup: */
311         for (i = 0; i < disp_kms->connectors_count; i++) {
312                 struct connector *connector = &disp_kms->connector[i];
313                 uint32_t used_planes = 0;
314                 drmModeModeInfo *mode = connector->mode;
316                 if (! mode) {
317                         continue;
318                 }
320                 if (! disp_kms->ovr[i]) {
322                         for (j = 0; j < disp_kms->plane_resources->count_planes; j++) {
323                                 drmModePlane *ovr = drmModeGetPlane(disp->fd,
324                                                 disp_kms->plane_resources->planes[j]);
325                                 if ((ovr->possible_crtcs & (1 << connector->pipe)) &&
326                                                 !(used_planes & (1 << j))) {
327                                         disp_kms->ovr[i] = ovr;
328                                         used_planes |= (1 << j);
329                                         break;
330                                 }
331                         }
332                 }
334                 if (! disp_kms->ovr[i]) {
335                         MSG("Could not find plane for crtc %d", connector->crtc);
336                         ret = -1;
337                         /* carry on and see if we can find at least one usable plane */
338                         continue;
339                 }
341                 ret = drmModeSetPlane(disp->fd, disp_kms->ovr[i]->plane_id,
342                                 connector->crtc, buf_kms->fb_id, 0,
343                                 /* make video fullscreen: */
344                                 0, 0, mode->hdisplay, mode->vdisplay,
345                                 /* source/cropping coordinates are given in Q16 */
346                                 x << 16, y << 16, w << 16, h << 16);
347                 if (ret) {
348                         ERROR("failed to enable plane %d: %s",
349                                         disp_kms->ovr[i]->plane_id, strerror(errno));
350                 }
351         }
353         return ret;
356 static void
357 connector_find_mode(struct display *disp, struct connector *c)
359         struct display_kms *disp_kms = to_display_kms(disp);
360         drmModeConnector *connector;
361         int i, j;
363         /* First, find the connector & mode */
364         c->mode = NULL;
365         for (i = 0; i < disp_kms->resources->count_connectors; i++) {
366                 connector = drmModeGetConnector(disp->fd,
367                                 disp_kms->resources->connectors[i]);
369                 if (!connector) {
370                         ERROR("could not get connector %i: %s",
371                                         disp_kms->resources->connectors[i], strerror(errno));
372                         drmModeFreeConnector(connector);
373                         continue;
374                 }
376                 if (!connector->count_modes) {
377                         drmModeFreeConnector(connector);
378                         continue;
379                 }
381                 if (connector->connector_id != c->id) {
382                         drmModeFreeConnector(connector);
383                         continue;
384                 }
386                 for (j = 0; j < connector->count_modes; j++) {
387                         c->mode = &connector->modes[j];
388                         if (!strcmp(c->mode->name, c->mode_str))
389                                 break;
390                 }
392                 /* Found it, break out */
393                 if (c->mode)
394                         break;
396                 drmModeFreeConnector(connector);
397         }
399         if (!c->mode) {
400                 ERROR("failed to find mode \"%s\"", c->mode_str);
401                 return;
402         }
404         /* Now get the encoder */
405         for (i = 0; i < disp_kms->resources->count_encoders; i++) {
406                 c->encoder = drmModeGetEncoder(disp->fd,
407                                 disp_kms->resources->encoders[i]);
409                 if (!c->encoder) {
410                         ERROR("could not get encoder %i: %s",
411                                         disp_kms->resources->encoders[i], strerror(errno));
412                         drmModeFreeEncoder(c->encoder);
413                         continue;
414                 }
416                 if (c->encoder->encoder_id  == connector->encoder_id)
417                         break;
419                 drmModeFreeEncoder(c->encoder);
420         }
422         if (c->crtc == -1)
423                 c->crtc = c->encoder->crtc_id;
425         /* and figure out which crtc index it is: */
426         for (i = 0; i < disp_kms->resources->count_crtcs; i++) {
427                 if (c->crtc == (int)disp_kms->resources->crtcs[i]) {
428                         c->pipe = i;
429                         break;
430                 }
431         }
434 void
435 disp_kms_usage(void)
437         MSG("KMS Display Options:");
438         MSG("\t-t <tiled-mode>\t8, 16, 32, or auto");
439         MSG("\t-s <connector_id>:<mode>\tset a mode");
440         MSG("\t-s <connector_id>@<crtc_id>:<mode>\tset a mode");
443 struct display *
444 disp_kms_open(int argc, char **argv)
446         struct display_kms *disp_kms = NULL;
447         struct display *disp;
448         int i;
450         disp_kms = calloc(1, sizeof(*disp_kms));
451         if (!disp_kms) {
452                 ERROR("allocation failed");
453                 goto fail;
454         }
455         disp = &disp_kms->base;
457         disp->fd = drmOpen("omapdrm", NULL);
458         if (disp->fd < 0) {
459                 ERROR("could not open drm device: %s (%d)", strerror(errno), errno);
460                 goto fail;
461         }
463         disp->dev = omap_device_new(disp->fd);
464         if (!disp->dev) {
465                 ERROR("couldn't create device");
466                 goto fail;
467         }
469         disp->get_buffers = get_buffers;
470         disp->get_vid_buffers = get_vid_buffers;
471         disp->post_buffer = post_buffer;
472         disp->post_vid_buffer = post_vid_buffer;
474         disp_kms->resources = drmModeGetResources(disp->fd);
475         if (!disp_kms->resources) {
476                 ERROR("drmModeGetResources failed: %s", strerror(errno));
477                 goto fail;
478         }
480         disp_kms->plane_resources = drmModeGetPlaneResources(disp->fd);
481         if (!disp_kms->plane_resources) {
482                 ERROR("drmModeGetPlaneResources failed: %s", strerror(errno));
483                 goto fail;
484         }
486         /* note: set args to NULL after we've parsed them so other modules know
487          * that it is already parsed (since the arg parsing is decentralized)
488          */
489         for (i = 1; i < argc; i++) {
490                 if (!argv[i]) {
491                         continue;
492                 }
493                 if (!strcmp("-t", argv[i])) {
494                         int n;
495                         argv[i++] = NULL;
496                         if (!strcmp(argv[i], "auto")) {
497                                 n = 0;
498                         } else if (sscanf(argv[i], "%d", &n) != 1) {
499                                 ERROR("invalid arg: %s", argv[i]);
500                                 goto fail;
501                         }
503                         disp_kms->bo_flags &= ~OMAP_BO_TILED;
505                         if (n == 8) {
506                                 disp_kms->bo_flags |= OMAP_BO_TILED_8;
507                         } else if (n == 16) {
508                                 disp_kms->bo_flags |= OMAP_BO_TILED_16;
509                         } else if (n == 32) {
510                                 disp_kms->bo_flags |= OMAP_BO_TILED_32;
511                         } else if (n == 0) {
512                                 disp_kms->bo_flags |= OMAP_BO_TILED;
513                         } else {
514                                 ERROR("invalid arg: %s", argv[i]);
515                                 goto fail;
516                         }
517                 } else if (!strcmp("-s", argv[i])) {
518                         struct connector *connector =
519                                         &disp_kms->connector[disp_kms->connectors_count++];
520                         connector->crtc = -1;
521                         argv[i++] = NULL;
522                         if (sscanf(argv[i], "%d:%64s",
523                                    &connector->id,
524                                    connector->mode_str) != 2 &&
525                             sscanf(argv[i], "%d@%d:%64s",
526                                    &connector->id,
527                                    &connector->crtc,
528                                    connector->mode_str) != 3) {
529                                 // TODO: we could support connector specified as a name too, I suppose
530                                 ERROR("invalid arg: %s", argv[i]);
531                                 goto fail;
532                         }
533                 } else {
534                         /* ignore */
535                         continue;
536                 }
537                 argv[i] = NULL;
538         }
540         disp->width = 0;
541         disp->height = 0;
542         for (i = 0; i < (int)disp_kms->connectors_count; i++) {
543                 struct connector *c = &disp_kms->connector[i];
544                 connector_find_mode(disp, c);
545                 if (c->mode == NULL)
546                         continue;
547                 /* setup side-by-side virtual display */
548                 disp->width += c->mode->hdisplay;
549                 if (disp->height < c->mode->vdisplay) {
550                         disp->height = c->mode->vdisplay;
551                 }
552         }
554         MSG("using %d connectors, %dx%d display",
555                         disp_kms->connectors_count, disp->width, disp->height);
557         return disp;
559 fail:
560         // XXX cleanup
561         return NULL;