src/video/omapdss/osdl_video.c

   1 /*
   2  * (C) Gražvydas "notaz" Ignotas, 2010-2012
   3  *
   4  * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
   5  * See the COPYING file in the top-level directory.
   6  */
   7
   8 #include <stdio.h>
   9 #include <stdlib.h>
  10 #include <string.h>
  11 #include <strings.h>
  12 #include <ctype.h>
  13 #include <sys/types.h>
  14 #include <sys/stat.h>
  15 #include <fcntl.h>
  16 #include <sys/ioctl.h>
  17 #include <unistd.h>
  18 #include <linux/fb.h>
  19
  20 #include "osdl.h"
  21 #include "omapfb.h"
  22 #include "linux/fbdev.h"
  23 #include "linux/xenv.h"
  24
  25 #define MIN(a, b) ( ((a) < (b)) ? (a) : (b) )
  26
  27 struct omapfb_state {
  28         struct omapfb_plane_info pi;
  29         struct omapfb_mem_info mi;
  30         struct omapfb_plane_info pi_old;
  31         struct omapfb_mem_info mi_old;
  32 };
  33
  34 static const char *get_fb_device(void)
  35 {
  36         const char *fbname = getenv("SDL_FBDEV");
  37         if (fbname == NULL)
  38                 fbname = "/dev/fb1";
  39
  40         return fbname;
  41 }
  42
  43 static int osdl_setup_omapfb(struct omapfb_state *ostate, int fd, int enabled,
  44         int x, int y, int w, int h, int mem, int *buffer_count)
  45 {
  46         struct omapfb_plane_info pi;
  47         struct omapfb_mem_info mi;
  48         int mem_blocks = *buffer_count;
  49         unsigned int size_cur;
  50         int ret;
  51
  52         memset(&pi, 0, sizeof(pi));
  53         memset(&mi, 0, sizeof(mi));
  54
  55         ret = ioctl(fd, OMAPFB_QUERY_PLANE, &pi);
  56         if (ret != 0) {
  57                 err_perror("QUERY_PLANE");
  58                 return -1;
  59         }
  60
  61         ret = ioctl(fd, OMAPFB_QUERY_MEM, &mi);
  62         if (ret != 0) {
  63                 err_perror("QUERY_MEM");
  64                 return -1;
  65         }
  66         size_cur = mi.size;
  67
  68         /* must disable when changing stuff */
  69         if (pi.enabled) {
  70                 pi.enabled = 0;
  71                 ret = ioctl(fd, OMAPFB_SETUP_PLANE, &pi);
  72                 if (ret != 0)
  73                         err_perror("SETUP_PLANE");
  74         }
  75
  76         /* allocate more mem, if needed */
  77         for (; size_cur < mem * mem_blocks && mem_blocks > 0; mem_blocks--) {
  78                 mi.size = mem * mem_blocks;
  79                 ret = ioctl(fd, OMAPFB_SETUP_MEM, &mi);
  80                 if (ret == 0)
  81                         break;
  82                 mi.size = size_cur;
  83         }
  84         if (mem_blocks <= 0) {
  85                 err("failed to allocate at least %d bytes of vram:\n", mem);
  86                 err_perror("SETUP_MEM");
  87                 return -1;
  88         }
  89
  90         *buffer_count = mem_blocks;
  91
  92         pi.pos_x = x;
  93         pi.pos_y = y;
  94         pi.out_width = w;
  95         pi.out_height = h;
  96         pi.enabled = enabled;
  97
  98         ret = ioctl(fd, OMAPFB_SETUP_PLANE, &pi);
  99         if (ret != 0) {
 100                 err_perror("SETUP_PLANE");
 101                 err("(%d %d %d %d)\n", x, y, w, h);
 102                 return -1;
 103         }
 104
 105         ostate->pi = pi;
 106         ostate->mi = mi;
 107         return 0;
 108 }
 109
 110 static int read_sysfs(const char *fname, char *buff, size_t size)
 111 {
 112         FILE *f;
 113         int ret;
 114
 115         f = fopen(fname, "r");
 116         if (f == NULL) {
 117                 err_perror("open %s: ", fname);
 118                 return -1;
 119         }
 120
 121         ret = fread(buff, 1, size - 1, f);
 122         fclose(f);
 123         if (ret <= 0) {
 124                 err_perror("read %s: ", fname);
 125                 return -1;
 126         }
 127
 128         buff[ret] = 0;
 129         for (ret--; ret >= 0 && isspace(buff[ret]); ret--)
 130                 buff[ret] = 0;
 131
 132         return 0;
 133 }
 134
 135 int read_vscreeninfo(const char *fbname, int *w, int *h)
 136 {
 137         struct fb_var_screeninfo fbvar;
 138         int ret, fd;
 139
 140         fd = open(fbname, O_RDWR);
 141         if (fd == -1) {
 142                 err_perror("open %s", fbname);
 143                 return -1;
 144         }
 145
 146         ret = ioctl(fd, FBIOGET_VSCREENINFO, &fbvar);
 147         close(fd);
 148
 149         if (ret == -1) {
 150                 err_perror("ioctl %s", fbname);
 151                 return -1;
 152         }
 153
 154         if (fbvar.xres == 0 || fbvar.yres == 0)
 155                 return -1;
 156
 157         *w = fbvar.xres;
 158         *h = fbvar.yres;
 159         return 0;
 160 }
 161
 162 int osdl_video_detect_screen(struct SDL_PrivateVideoData *pdata)
 163 {
 164         int fb_id, overlay_id = -1, screen_id = -1;
 165         char buff[64], screen_name[64];
 166         const char *fbname;
 167         struct stat status;
 168         int fd, i, ret;
 169         int w, h;
 170         FILE *f;
 171
 172         pdata->phys_w = pdata->phys_h = 0;
 173
 174         fbname = get_fb_device();
 175
 176         /* Figure out screen resolution, we need to know default resolution
 177          * to report to SDL and for centering stuff.
 178          * The only way to achieve this seems to be walking some sysfs files.. */
 179         ret = stat(fbname, &status);
 180         if (ret != 0) {
 181                 err_perror("can't stat %s", fbname);
 182                 goto skip_screen;
 183         }
 184         fb_id = minor(status.st_rdev);
 185
 186         snprintf(buff, sizeof(buff), "/sys/class/graphics/fb%d/overlays", fb_id);
 187         f = fopen(buff, "r");
 188         if (f == NULL) {
 189                 err("can't open %s, skip screen detection", buff);
 190                 goto skip_screen;
 191         }
 192
 193         ret = fscanf(f, "%d", &overlay_id);
 194         fclose(f);
 195         if (ret != 1) {
 196                 err("can't parse %s, skip screen detection", buff);
 197                 goto skip_screen;
 198         }
 199
 200         snprintf(buff, sizeof(buff), "/sys/devices/platform/omapdss/overlay%d/manager", overlay_id);
 201         ret = read_sysfs(buff, screen_name, sizeof(screen_name));
 202         if (ret < 0) {
 203                 err("skip screen detection");
 204                 goto skip_screen;
 205         }
 206
 207         for (i = 0; ; i++) {
 208                 snprintf(buff, sizeof(buff), "/sys/devices/platform/omapdss/display%d/name", i);
 209                 ret = read_sysfs(buff, buff, sizeof(buff));
 210                 if (ret < 0)
 211                         break;
 212
 213                 if (strcmp(screen_name, buff) == 0) {
 214                         screen_id = i;
 215                         break;
 216                 }
 217         }
 218
 219         if (screen_id < 0) {
 220                 err("could not find screen");
 221                 goto skip_screen;
 222         }
 223
 224         snprintf(buff, sizeof(buff), "/sys/devices/platform/omapdss/display%d/timings", screen_id);
 225         f = fopen(buff, "r");
 226         if (f == NULL) {
 227                 err("can't open %s, skip screen detection", buff);
 228                 goto skip_screen;
 229         }
 230
 231         ret = fscanf(f, "%*d,%d/%*d/%*d/%*d,%d/%*d/%*d/%*d", &w, &h);
 232         fclose(f);
 233         if (ret != 2) {
 234                 err("can't parse %s (%d), skip screen detection", buff, ret);
 235                 goto skip_screen;
 236         }
 237
 238         log("detected %dx%d '%s' (%d) screen attached to fb %d and overlay %d",
 239                 w, h, screen_name, screen_id, fb_id, overlay_id);
 240
 241         pdata->phys_w = w;
 242         pdata->phys_h = h;
 243         return 0;
 244
 245 skip_screen:
 246         /* attempt to extract this from FB then */
 247         ret = read_vscreeninfo(fbname, &pdata->phys_w, &pdata->phys_h);
 248         if (ret != 0 && strcmp(fbname, "/dev/fb0") != 0) {
 249                 /* last resort */
 250                 ret = read_vscreeninfo("/dev/fb0", &pdata->phys_w, &pdata->phys_h);
 251         }
 252
 253         if (ret != 0) {
 254                 err("VSCREENINFO has nothing meaningful");
 255                 return -1;
 256         }
 257
 258         return 0;
 259 }
 260
 261 static int osdl_setup_omap_layer(struct SDL_PrivateVideoData *pdata,
 262                 const char *fbname, int width, int height, int bpp, int *buffer_count)
 263 {
 264         int x = 0, y = 0, w = width, h = height; /* layer size and pos */
 265         int screen_w = w, screen_h = h;
 266         int tmp_w, tmp_h;
 267         const char *tmp;
 268         int retval = -1;
 269         int ret, fd;
 270
 271         pdata->layer_x = pdata->layer_y = pdata->layer_w = pdata->layer_h = 0;
 272
 273         if (pdata->phys_w != 0)
 274                 screen_w = pdata->phys_w;
 275         if (pdata->phys_h != 0)
 276                 screen_h = pdata->phys_h;
 277
 278         fd = open(fbname, O_RDWR);
 279         if (fd == -1) {
 280                 err_perror("open %s", fbname);
 281                 return -1;
 282         }
 283
 284         /* FIXME: assuming layer doesn't change here */
 285         if (pdata->saved_layer == NULL) {
 286                 struct omapfb_state *slayer;
 287                 slayer = calloc(1, sizeof(*slayer));
 288                 if (slayer == NULL)
 289                         goto out;
 290
 291                 ret = ioctl(fd, OMAPFB_QUERY_PLANE, &slayer->pi_old);
 292                 if (ret != 0) {
 293                         err_perror("QUERY_PLANE");
 294                         goto out;
 295                 }
 296
 297                 ret = ioctl(fd, OMAPFB_QUERY_MEM, &slayer->mi_old);
 298                 if (ret != 0) {
 299                         err_perror("QUERY_MEM");
 300                         goto out;
 301                 }
 302
 303                 pdata->saved_layer = slayer;
 304         }
 305
 306         tmp = getenv("SDL_OMAP_LAYER_SIZE");
 307         if (tmp != NULL) {
 308                 if (strcasecmp(tmp, "fullscreen") == 0) {
 309                         w = screen_w, h = screen_h;
 310                 }
 311                 else if (strcasecmp(tmp, "scaled") == 0) {
 312                         float factor = MIN(((float)screen_w) / width, ((float)screen_h) / height);
 313                         w = (int)(factor*width), h = (int)(factor*height);
 314                 }
 315                 else if (strcasecmp(tmp, "pixelperfect") == 0) {
 316                         float factor = MIN(((float)screen_w) / width, ((float)screen_h) / height);
 317                         w = ((int)factor) * width, h = ((int)factor) * height;
 318                         /* factor < 1.f => 0x0 layer, so fall back to 'scaled' */
 319                         if (!w || !h) {
 320                                 w = (int)(factor * width), h = (int)(factor * height);
 321                         }
 322                 }
 323                 else if (sscanf(tmp, "%dx%d", &tmp_w, &tmp_h) == 2) {
 324                         w = tmp_w, h = tmp_h;
 325                 }
 326                 else {
 327                         err("layer size specified incorrectly, "
 328                                 "should be like 800x480");
 329                 }
 330         }
 331
 332         /* the layer can't be set larger than screen */
 333         tmp_w = w, tmp_h = h;
 334         if (w > screen_w)
 335                 w = screen_w;
 336         if (h > screen_h)
 337                 h = screen_h;
 338         if (w != tmp_w || h != tmp_h)
 339                 log("layer resized %dx%d -> %dx%d to fit screen", tmp_w, tmp_h, w, h);
 340
 341         x = screen_w / 2 - w / 2;
 342         y = screen_h / 2 - h / 2;
 343         ret = osdl_setup_omapfb(pdata->saved_layer, fd, 1, x, y, w, h,
 344                                 width * height * ((bpp + 7) / 8), buffer_count);
 345         if (ret == 0) {
 346                 pdata->layer_x = x;
 347                 pdata->layer_y = y;
 348                 pdata->layer_w = w;
 349                 pdata->layer_h = h;
 350         }
 351
 352         retval = ret;
 353 out:
 354         close(fd);
 355         return retval;
 356 }
 357
 358 void *osdl_video_set_mode(struct SDL_PrivateVideoData *pdata,
 359                           int border_l, int border_r, int border_t, int border_b,
 360                           int width, int height, int bpp, int *doublebuf,
 361                           const char *wm_title)
 362 {
 363         int buffers_try, buffers_set;
 364         const char *fbname;
 365         void *result;
 366         int ret;
 367
 368         fbname = get_fb_device();
 369
 370         if (pdata->fbdev != NULL) {
 371                 vout_fbdev_finish(pdata->fbdev);
 372                 pdata->fbdev = NULL;
 373         }
 374
 375         buffers_try = buffers_set = 1;
 376         if (*doublebuf)
 377                 /* actually try tripple buffering for reduced chance of tearing */
 378                 buffers_try = buffers_set = 3;
 379
 380         ret = osdl_setup_omap_layer(pdata, fbname, width, height, bpp, &buffers_set);
 381         if (ret < 0)
 382                 goto fail;
 383
 384         pdata->fbdev = vout_fbdev_init(fbname, &width, &height, bpp, buffers_set);
 385         if (pdata->fbdev == NULL)
 386                 goto fail;
 387
 388         if (border_l | border_r | border_t | border_b) {
 389                 width -= border_l + border_r;
 390                 height -= border_t + border_b;
 391                 result = vout_fbdev_resize(pdata->fbdev, width, height, bpp,
 392                                 border_l, border_r, border_t, border_b, buffers_set);
 393         }
 394         else {
 395                 result = osdl_video_flip(pdata);
 396         }
 397         if (result == NULL)
 398                 goto fail;
 399
 400         if (!pdata->xenv_up) {
 401                 int xenv_flags = XENV_CAP_KEYS | XENV_CAP_MOUSE;
 402                 ret = xenv_init(&xenv_flags, wm_title);
 403                 if (ret == 0) {
 404                         pdata->xenv_up = 1;
 405                         pdata->xenv_mouse = (xenv_flags & XENV_CAP_MOUSE) ? 1 : 0;
 406                 }
 407         }
 408
 409         if (buffers_try != buffers_set) {
 410                 log("only %d/%d buffers available, expect tearing\n",
 411                         buffers_set, buffers_try);
 412                 *doublebuf = buffers_set > 1;
 413         }
 414
 415         return result;
 416
 417 fail:
 418         osdl_video_finish(pdata);
 419         return NULL;
 420 }
 421
 422 void *osdl_video_flip(struct SDL_PrivateVideoData *pdata)
 423 {
 424         void *ret;
 425
 426         if (pdata->fbdev == NULL)
 427                 return NULL;
 428
 429         ret = vout_fbdev_flip(pdata->fbdev);
 430
 431         if (pdata->cfg_force_vsync)
 432                 vout_fbdev_wait_vsync(pdata->fbdev);
 433
 434         return ret;
 435 }
 436
 437 int osdl_video_pause(struct SDL_PrivateVideoData *pdata, int is_pause)
 438 {
 439         struct omapfb_state *state = pdata->saved_layer;
 440         struct omapfb_plane_info pi;
 441         struct omapfb_mem_info mi;
 442         int enabled;
 443         int fd = -1;
 444         int ret;
 445
 446         if (pdata->fbdev != NULL)
 447                 fd = vout_fbdev_get_fd(pdata->fbdev);
 448         if (fd == -1) {
 449                 err("bad fd %d", fd);
 450                 return -1;
 451         }
 452         if (state == NULL) {
 453                 err("missing layer state\n");
 454                 return -1;
 455         }
 456
 457         if (is_pause) {
 458                 ret = vout_fbdev_save(pdata->fbdev);
 459                 if (ret != 0)
 460                         return ret;
 461                 pi = state->pi_old;
 462                 mi = state->mi_old;
 463                 enabled = pi.enabled;
 464         } else {
 465                 pi = state->pi;
 466                 mi = state->mi;
 467                 enabled = 1;
 468         }
 469         pi.enabled = 0;
 470         ret = ioctl(fd, OMAPFB_SETUP_PLANE, &pi);
 471         if (ret != 0) {
 472                 err_perror("SETUP_PLANE");
 473                 return -1;
 474         }
 475
 476         ret = ioctl(fd, OMAPFB_SETUP_MEM, &mi);
 477         if (ret != 0)
 478                 err_perror("SETUP_MEM");
 479
 480         if (!is_pause) {
 481                 ret = vout_fbdev_restore(pdata->fbdev);
 482                 if (ret != 0) {
 483                         err("fbdev_restore failed\n");
 484                         return ret;
 485                 }
 486         }
 487
 488         if (enabled) {
 489                 pi.enabled = 1;
 490                 ret = ioctl(fd, OMAPFB_SETUP_PLANE, &pi);
 491                 if (ret != 0) {
 492                         err_perror("SETUP_PLANE");
 493                         return -1;
 494                 }
 495         }
 496
 497         return 0;
 498 }
 499
 500 void osdl_video_finish(struct SDL_PrivateVideoData *pdata)
 501 {
 502         static const char *fbname;
 503
 504         fbname = get_fb_device();
 505         if (pdata->fbdev != NULL) {
 506                 vout_fbdev_finish(pdata->fbdev);
 507                 pdata->fbdev = NULL;
 508         }
 509
 510         /* restore the OMAP layer */
 511         if (pdata->saved_layer != NULL) {
 512                 struct omapfb_state *slayer = pdata->saved_layer;
 513                 int fd;
 514
 515                 fd = open(fbname, O_RDWR);
 516                 if (fd != -1) {
 517                         int enabled = slayer->pi_old.enabled;
 518
 519                         /* be sure to disable while setting up */
 520                         slayer->pi_old.enabled = 0;
 521                         ioctl(fd, OMAPFB_SETUP_PLANE, &slayer->pi_old);
 522                         ioctl(fd, OMAPFB_SETUP_MEM, &slayer->mi_old);
 523                         if (enabled) {
 524                                 slayer->pi_old.enabled = enabled;
 525                                 ioctl(fd, OMAPFB_SETUP_PLANE, &slayer->pi_old);
 526                         }
 527                         close(fd);
 528                 }
 529                 free(slayer);
 530                 pdata->saved_layer = NULL;
 531         }
 532
 533         if (pdata->xenv_up) {
 534                 xenv_finish();
 535                 pdata->xenv_up = 0;
 536         }
 537 }
 538