src/video/omapdss/osdl_video.c

   1 /*
   2  * (C) Gražvydas "notaz" Ignotas, 2010
   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 "omapsdl.h"
  21 #include "omapfb.h"
  22 #include "linux/fbdev.h"
  23 #include "linux/oshide.h"
  24
  25 struct omapfb_saved_layer {
  26         struct omapfb_plane_info pi;
  27         struct omapfb_mem_info mi;
  28 };
  29
  30 static const char *get_fb_device(void)
  31 {
  32         const char *fbname = getenv("SDL_FBDEV");
  33         if (fbname == NULL)
  34                 fbname = "/dev/fb1";
  35
  36         return fbname;
  37 }
  38
  39 static int osdl_setup_omapfb(int fd, int enabled, int x, int y, int w, int h, int mem)
  40 {
  41         struct omapfb_plane_info pi;
  42         struct omapfb_mem_info mi;
  43         int ret;
  44
  45         ret = ioctl(fd, OMAPFB_QUERY_PLANE, &pi);
  46         if (ret != 0) {
  47                 err_perror("QUERY_PLANE");
  48                 return -1;
  49         }
  50
  51         ret = ioctl(fd, OMAPFB_QUERY_MEM, &mi);
  52         if (ret != 0) {
  53                 err_perror("QUERY_MEM");
  54                 return -1;
  55         }
  56
  57         /* must disable when changing stuff */
  58         if (pi.enabled) {
  59                 pi.enabled = 0;
  60                 ret = ioctl(fd, OMAPFB_SETUP_PLANE, &pi);
  61                 if (ret != 0)
  62                         err_perror("SETUP_PLANE");
  63         }
  64
  65         mi.size = mem;
  66         ret = ioctl(fd, OMAPFB_SETUP_MEM, &mi);
  67         if (ret != 0) {
  68                 err_perror("SETUP_MEM");
  69                 return -1;
  70         }
  71
  72         pi.pos_x = x;
  73         pi.pos_y = y;
  74         pi.out_width = w;
  75         pi.out_height = h;
  76         pi.enabled = enabled;
  77
  78         ret = ioctl(fd, OMAPFB_SETUP_PLANE, &pi);
  79         if (ret != 0) {
  80                 err_perror("SETUP_PLANE");
  81                 return -1;
  82         }
  83
  84         return 0;
  85 }
  86
  87 static int read_sysfs(const char *fname, char *buff, size_t size)
  88 {
  89         FILE *f;
  90         int ret;
  91
  92         f = fopen(fname, "r");
  93         if (f == NULL) {
  94                 err_perror("open %s: ", fname);
  95                 return -1;
  96         }
  97
  98         ret = fread(buff, 1, size - 1, f);
  99         fclose(f);
 100         if (ret <= 0) {
 101                 err_perror("read %s: ", fname);
 102                 return -1;
 103         }
 104
 105         buff[ret] = 0;
 106         for (ret--; ret >= 0 && isspace(buff[ret]); ret--)
 107                 buff[ret] = 0;
 108
 109         return 0;
 110 }
 111
 112 int osdl_video_detect_screen(struct SDL_PrivateVideoData *pdata)
 113 {
 114         int fb_id, overlay_id = -1, screen_id = -1;
 115         struct fb_var_screeninfo fbvar;
 116         char buff[64], screen_name[64];
 117         const char *fbname;
 118         struct stat status;
 119         int fd, i, ret;
 120         int w, h;
 121         FILE *f;
 122
 123         fbname = get_fb_device();
 124
 125         /* Figure out screen resolution, we need to know default resolution
 126          * to report to SDL and for centering stuff.
 127          * The only way to achieve this seems to be walking some sysfs files.. */
 128         ret = stat(fbname, &status);
 129         if (ret != 0) {
 130                 err_perror("can't stat %s", fbname);
 131                 goto skip_screen;
 132         }
 133         fb_id = minor(status.st_rdev);
 134
 135         snprintf(buff, sizeof(buff), "/sys/class/graphics/fb%d/overlays", fb_id);
 136         f = fopen(buff, "r");
 137         if (f == NULL) {
 138                 err("can't open %s, skip screen detection", buff);
 139                 goto skip_screen;
 140         }
 141
 142         ret = fscanf(f, "%d", &overlay_id);
 143         fclose(f);
 144         if (ret != 1) {
 145                 err("can't parse %s, skip screen detection", buff);
 146                 goto skip_screen;
 147         }
 148
 149         snprintf(buff, sizeof(buff), "/sys/devices/platform/omapdss/overlay%d/manager", overlay_id);
 150         ret = read_sysfs(buff, screen_name, sizeof(screen_name));
 151         if (ret < 0) {
 152                 err("skip screen detection");
 153                 goto skip_screen;
 154         }
 155
 156         for (i = 0; ; i++) {
 157                 snprintf(buff, sizeof(buff), "/sys/devices/platform/omapdss/display%d/name", i);
 158                 ret = read_sysfs(buff, buff, sizeof(buff));
 159                 if (ret < 0)
 160                         break;
 161
 162                 if (strcmp(screen_name, buff) == 0) {
 163                         screen_id = i;
 164                         break;
 165                 }
 166         }
 167
 168         if (screen_id < 0) {
 169                 err("could not find screen");
 170                 goto skip_screen;
 171         }
 172
 173         snprintf(buff, sizeof(buff), "/sys/devices/platform/omapdss/display%d/timings", screen_id);
 174         f = fopen(buff, "r");
 175         if (f == NULL) {
 176                 err("can't open %s, skip screen detection", buff);
 177                 goto skip_screen;
 178         }
 179
 180         ret = fscanf(f, "%*d,%d/%*d/%*d/%*d,%d/%*d/%*d/%*d", &w, &h);
 181         fclose(f);
 182         if (ret != 2) {
 183                 err("can't parse %s (%d), skip screen detection", buff, ret);
 184                 goto skip_screen;
 185         }
 186
 187         log("detected %dx%d '%s' (%d) screen attached to fb %d and overlay %d",
 188                 w, h, screen_name, screen_id, fb_id, overlay_id);
 189
 190         pdata->screen_w = w;
 191         pdata->screen_h = h;
 192         return 0;
 193
 194 skip_screen:
 195         /* attempt to extract this from FB then */
 196         fd = open(fbname, O_RDWR);
 197         if (fd == -1) {
 198                 err_perror("open %s", fbname);
 199                 return -1;
 200         }
 201
 202         ret = ioctl(fd, FBIOGET_VSCREENINFO, &fbvar);
 203         close(fd);
 204         if (ret == -1) {
 205                 err_perror("ioctl %s", fbname);
 206                 return -1;
 207         }
 208
 209         if (fbvar.xres == 0 || fbvar.yres == 0) {
 210                 err("VSCREENINFO has nothing meaningful");
 211                 return -1;
 212         }
 213
 214         pdata->screen_w = fbvar.xres;
 215         pdata->screen_h = fbvar.yres;
 216         return 0;
 217 }
 218
 219 static int osdl_setup_omap_layer(struct SDL_PrivateVideoData *pdata,
 220                 const char *fbname, int width, int height, int bpp)
 221 {
 222         int x = 0, y = 0, w = width, h = height; /* layer size and pos */
 223         int screen_w = w, screen_h = h;
 224         const char *tmp;
 225         int ret, fd;
 226
 227         if (pdata->screen_w != 0)
 228                 screen_w = pdata->screen_w;
 229         if (pdata->screen_h != 0)
 230                 screen_h = pdata->screen_h;
 231
 232         fd = open(fbname, O_RDWR);
 233         if (fd == -1) {
 234                 err_perror("open %s", fbname);
 235                 return -1;
 236         }
 237
 238         /* FIXME: assuming layer doesn't change here */
 239         if (pdata->saved_layer == NULL) {
 240                 struct omapfb_saved_layer *slayer;
 241                 slayer = calloc(1, sizeof(*slayer));
 242                 if (slayer == NULL)
 243                         return -1;
 244
 245                 ret = ioctl(fd, OMAPFB_QUERY_PLANE, &slayer->pi);
 246                 if (ret != 0) {
 247                         err_perror("QUERY_PLANE");
 248                         return -1;
 249                 }
 250
 251                 ret = ioctl(fd, OMAPFB_QUERY_MEM, &slayer->mi);
 252                 if (ret != 0) {
 253                         err_perror("QUERY_MEM");
 254                         return -1;
 255                 }
 256
 257                 pdata->saved_layer = slayer;
 258         }
 259
 260         tmp = getenv("SDL_OMAP_LAYER_SIZE");
 261         if (tmp != NULL) {
 262                 int w_, h_;
 263                 if (strcasecmp(tmp, "fullscreen") == 0)
 264                         w = screen_w, h = screen_h;
 265                 else if (sscanf(tmp, "%dx%d", &w_, &h_) == 2)
 266                         w = w_, h = h_;
 267                 else
 268                         err("layer size specified incorrectly, "
 269                                 "should be like 800x480");
 270         }
 271
 272         x = screen_w / 2 - w / 2;
 273         y = screen_h / 2 - h / 2;
 274         ret = osdl_setup_omapfb(fd, 1, x, y, w, h, width * height * ((bpp + 7) / 8) * 3);
 275         close(fd);
 276
 277         return ret;
 278 }
 279
 280 int osdl_video_set_mode(struct SDL_PrivateVideoData *pdata, int width, int height, int bpp)
 281 {
 282         const char *fbname;
 283         int ret;
 284
 285         bpp = 16; // FIXME
 286
 287         fbname = get_fb_device();
 288
 289         if (pdata->fbdev != NULL) {
 290                 vout_fbdev_finish(pdata->fbdev);
 291                 pdata->fbdev = NULL;
 292         }
 293
 294         omapsdl_config_from_env();
 295
 296         ret = osdl_setup_omap_layer(pdata, fbname, width, height, bpp);
 297         if (ret < 0)
 298                 return -1;
 299
 300         pdata->fbdev = vout_fbdev_init(fbname, &width, &height, 0);
 301         if (pdata->fbdev == NULL)
 302                 return -1;
 303
 304         if (!pdata->oshide_done) {
 305                 oshide_init();
 306                 pdata->oshide_done = 1;
 307         }
 308
 309         return 0;
 310 }
 311
 312 void *osdl_video_flip(struct SDL_PrivateVideoData *pdata)
 313 {
 314         if (pdata->fbdev == NULL)
 315                 return NULL;
 316
 317         if (gcfg_force_vsync)
 318                 vout_fbdev_wait_vsync(pdata->fbdev);
 319
 320         return vout_fbdev_flip(pdata->fbdev);
 321 }
 322
 323 void osdl_video_finish(struct SDL_PrivateVideoData *pdata)
 324 {
 325         static const char *fbname;
 326
 327         fbname = get_fb_device();
 328         if (pdata->fbdev != NULL) {
 329                 vout_fbdev_finish(pdata->fbdev);
 330                 pdata->fbdev = NULL;
 331         }
 332
 333         /* restore the OMAP layer */
 334         if (pdata->saved_layer != NULL) {
 335                 struct omapfb_saved_layer *slayer = pdata->saved_layer;
 336                 int fd;
 337
 338                 fd = open(fbname, O_RDWR);
 339                 if (fd != -1) {
 340                         int enabled = slayer->pi.enabled;
 341
 342                         /* be sure to disable while setting up */
 343                         slayer->pi.enabled = 0;
 344                         ioctl(fd, OMAPFB_SETUP_PLANE, &slayer->pi);
 345                         ioctl(fd, OMAPFB_SETUP_MEM, &slayer->mi);
 346                         if (enabled) {
 347                                 slayer->pi.enabled = enabled;
 348                                 ioctl(fd, OMAPFB_SETUP_PLANE, &slayer->pi);
 349                         }
 350                         close(fd);
 351                 }
 352                 free(slayer);
 353                 pdata->saved_layer = NULL;
 354         }
 355
 356         if (pdata->oshide_done) {
 357                 oshide_finish();
 358                 pdata->oshide_done = 0;
 359         }
 360 }
 361