2 * (C) GraÅžvydas "notaz" Ignotas, 2010-2012
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.
13 #include <sys/types.h>
16 #include <sys/ioctl.h>
22 #include "linux/fbdev.h"
23 #include "linux/xenv.h"
25 struct omapfb_saved_layer {
26 struct omapfb_plane_info pi;
27 struct omapfb_mem_info mi;
30 static const char *get_fb_device(void)
32 const char *fbname = getenv("SDL_FBDEV");
39 static int osdl_setup_omapfb(int fd, int enabled, int x, int y, int w, int h,
40 int mem, int *buffer_count)
42 struct omapfb_plane_info pi;
43 struct omapfb_mem_info mi;
44 int mem_blocks = *buffer_count;
47 memset(&pi, 0, sizeof(pi));
48 memset(&mi, 0, sizeof(mi));
50 ret = ioctl(fd, OMAPFB_QUERY_PLANE, &pi);
52 err_perror("QUERY_PLANE");
56 ret = ioctl(fd, OMAPFB_QUERY_MEM, &mi);
58 err_perror("QUERY_MEM");
62 /* must disable when changing stuff */
65 ret = ioctl(fd, OMAPFB_SETUP_PLANE, &pi);
67 err_perror("SETUP_PLANE");
70 if (mi.size < mem * mem_blocks) {
71 for (; mem_blocks > 0; mem_blocks--) {
72 mi.size = mem * mem_blocks;
73 ret = ioctl(fd, OMAPFB_SETUP_MEM, &mi);
77 if (ret != 0 || mem_blocks <= 0) {
78 err("failed to allocate at least %d bytes of vram:\n", mem);
79 err_perror("SETUP_MEM");
83 *buffer_count = mem_blocks;
91 ret = ioctl(fd, OMAPFB_SETUP_PLANE, &pi);
93 err_perror("SETUP_PLANE");
94 err("(%d %d %d %d)\n", x, y, w, h);
101 static int read_sysfs(const char *fname, char *buff, size_t size)
106 f = fopen(fname, "r");
108 err_perror("open %s: ", fname);
112 ret = fread(buff, 1, size - 1, f);
115 err_perror("read %s: ", fname);
120 for (ret--; ret >= 0 && isspace(buff[ret]); ret--)
126 int read_vscreeninfo(const char *fbname, int *w, int *h)
128 struct fb_var_screeninfo fbvar;
131 fd = open(fbname, O_RDWR);
133 err_perror("open %s", fbname);
137 ret = ioctl(fd, FBIOGET_VSCREENINFO, &fbvar);
141 err_perror("ioctl %s", fbname);
145 if (fbvar.xres == 0 || fbvar.yres == 0)
153 int osdl_video_detect_screen(struct SDL_PrivateVideoData *pdata)
155 int fb_id, overlay_id = -1, screen_id = -1;
156 char buff[64], screen_name[64];
163 pdata->phys_w = pdata->phys_h = 0;
165 fbname = get_fb_device();
167 /* Figure out screen resolution, we need to know default resolution
168 * to report to SDL and for centering stuff.
169 * The only way to achieve this seems to be walking some sysfs files.. */
170 ret = stat(fbname, &status);
172 err_perror("can't stat %s", fbname);
175 fb_id = minor(status.st_rdev);
177 snprintf(buff, sizeof(buff), "/sys/class/graphics/fb%d/overlays", fb_id);
178 f = fopen(buff, "r");
180 err("can't open %s, skip screen detection", buff);
184 ret = fscanf(f, "%d", &overlay_id);
187 err("can't parse %s, skip screen detection", buff);
191 snprintf(buff, sizeof(buff), "/sys/devices/platform/omapdss/overlay%d/manager", overlay_id);
192 ret = read_sysfs(buff, screen_name, sizeof(screen_name));
194 err("skip screen detection");
199 snprintf(buff, sizeof(buff), "/sys/devices/platform/omapdss/display%d/name", i);
200 ret = read_sysfs(buff, buff, sizeof(buff));
204 if (strcmp(screen_name, buff) == 0) {
211 err("could not find screen");
215 snprintf(buff, sizeof(buff), "/sys/devices/platform/omapdss/display%d/timings", screen_id);
216 f = fopen(buff, "r");
218 err("can't open %s, skip screen detection", buff);
222 ret = fscanf(f, "%*d,%d/%*d/%*d/%*d,%d/%*d/%*d/%*d", &w, &h);
225 err("can't parse %s (%d), skip screen detection", buff, ret);
229 log("detected %dx%d '%s' (%d) screen attached to fb %d and overlay %d",
230 w, h, screen_name, screen_id, fb_id, overlay_id);
237 /* attempt to extract this from FB then */
238 ret = read_vscreeninfo(fbname, &pdata->phys_w, &pdata->phys_h);
239 if (ret != 0 && strcmp(fbname, "/dev/fb0") != 0) {
241 ret = read_vscreeninfo("/dev/fb0", &pdata->phys_w, &pdata->phys_h);
245 err("VSCREENINFO has nothing meaningful");
252 static int osdl_setup_omap_layer(struct SDL_PrivateVideoData *pdata,
253 const char *fbname, int width, int height, int bpp, int *buffer_count)
255 int x = 0, y = 0, w = width, h = height; /* layer size and pos */
256 int screen_w = w, screen_h = h;
262 pdata->layer_x = pdata->layer_y = pdata->layer_w = pdata->layer_h = 0;
264 if (pdata->phys_w != 0)
265 screen_w = pdata->phys_w;
266 if (pdata->phys_h != 0)
267 screen_h = pdata->phys_h;
269 fd = open(fbname, O_RDWR);
271 err_perror("open %s", fbname);
275 /* FIXME: assuming layer doesn't change here */
276 if (pdata->saved_layer == NULL) {
277 struct omapfb_saved_layer *slayer;
278 slayer = calloc(1, sizeof(*slayer));
282 ret = ioctl(fd, OMAPFB_QUERY_PLANE, &slayer->pi);
284 err_perror("QUERY_PLANE");
288 ret = ioctl(fd, OMAPFB_QUERY_MEM, &slayer->mi);
290 err_perror("QUERY_MEM");
294 pdata->saved_layer = slayer;
297 tmp = getenv("SDL_OMAP_LAYER_SIZE");
299 if (strcasecmp(tmp, "fullscreen") == 0)
300 w = screen_w, h = screen_h;
301 else if (sscanf(tmp, "%dx%d", &tmp_w, &tmp_h) == 2)
302 w = tmp_w, h = tmp_h;
304 err("layer size specified incorrectly, "
305 "should be like 800x480");
308 /* the layer can't be set larger than screen */
309 tmp_w = w, tmp_h = h;
314 if (w != tmp_w || h != tmp_h)
315 log("layer resized %dx%d -> %dx%d to fit screen", tmp_w, tmp_h, w, h);
317 x = screen_w / 2 - w / 2;
318 y = screen_h / 2 - h / 2;
319 ret = osdl_setup_omapfb(fd, 1, x, y, w, h,
320 width * height * ((bpp + 7) / 8), buffer_count);
334 void *osdl_video_set_mode(struct SDL_PrivateVideoData *pdata,
335 int border_l, int border_r, int border_t, int border_b,
336 int width, int height, int bpp, int *doublebuf)
338 int buffers_try, buffers_set;
343 fbname = get_fb_device();
345 if (pdata->fbdev != NULL) {
346 vout_fbdev_finish(pdata->fbdev);
350 buffers_try = buffers_set = 1;
352 /* actually try tripple buffering for reduced chance of tearing */
353 buffers_try = buffers_set = 3;
355 ret = osdl_setup_omap_layer(pdata, fbname, width, height, bpp, &buffers_set);
359 pdata->fbdev = vout_fbdev_init(fbname, &width, &height, bpp, buffers_set);
360 if (pdata->fbdev == NULL)
363 if (border_l | border_r | border_t | border_b) {
364 width -= border_l + border_r;
365 height -= border_t + border_b;
366 result = vout_fbdev_resize(pdata->fbdev, width, height, bpp,
367 border_l, border_r, border_t, border_b, buffers_set);
370 result = osdl_video_flip(pdata);
375 if (!pdata->xenv_up) {
381 if (buffers_try != buffers_set) {
382 log("only %d/%d buffers available, expect tearing\n",
383 buffers_set, buffers_try);
384 *doublebuf = buffers_set > 1;
390 osdl_video_finish(pdata);
394 void *osdl_video_flip(struct SDL_PrivateVideoData *pdata)
398 if (pdata->fbdev == NULL)
401 ret = vout_fbdev_flip(pdata->fbdev);
403 if (pdata->cfg_force_vsync)
404 vout_fbdev_wait_vsync(pdata->fbdev);
409 void osdl_video_finish(struct SDL_PrivateVideoData *pdata)
411 static const char *fbname;
413 fbname = get_fb_device();
414 if (pdata->fbdev != NULL) {
415 vout_fbdev_finish(pdata->fbdev);
419 /* restore the OMAP layer */
420 if (pdata->saved_layer != NULL) {
421 struct omapfb_saved_layer *slayer = pdata->saved_layer;
424 fd = open(fbname, O_RDWR);
426 int enabled = slayer->pi.enabled;
428 /* be sure to disable while setting up */
429 slayer->pi.enabled = 0;
430 ioctl(fd, OMAPFB_SETUP_PLANE, &slayer->pi);
431 ioctl(fd, OMAPFB_SETUP_MEM, &slayer->mi);
433 slayer->pi.enabled = enabled;
434 ioctl(fd, OMAPFB_SETUP_PLANE, &slayer->pi);
439 pdata->saved_layer = NULL;
442 if (pdata->xenv_up) {