int main(int argc, char **argv)
{
int ret, fd;
const char *card;
struct modeset_dev *iter;
struct modeset_buf *buf;
/* check which DRM device to open */
if (argc > 1)
card = argv[1];
else
card = "/dev/dri/card0";
fprintf(stderr, "using card '%s'\n", card);
/* open the DRM device */
ret = modeset_open(&fd, card);
if (ret)
goto out_return;
/* prepare all connectors and CRTCs */
ret = modeset_prepare(fd);
if (ret)
goto out_close;
/* perform actual modesetting on each found connector+CRTC */
for (iter = modeset_list; iter; iter = iter->next) {
iter->saved_crtc = drmModeGetCrtc(fd, iter->crtc);
buf = &iter->bufs[iter->front_buf];
ret = drmModeSetCrtc(fd, iter->crtc, buf->fb, 0, 0,
&iter->conn, 1, &iter->mode);
if (ret)
fprintf(stderr, "cannot set CRTC for connector %u (%d): %m\n",
iter->conn, errno);
}
/* draw some colors for 5seconds */
modeset_draw(fd);
/* cleanup everything */
modeset_cleanup(fd);
ret = 0;
out_close:
close(fd);
out_return:
if (ret) {
errno = -ret;
fprintf(stderr, "modeset failed with error %d: %m\n", errno);
} else {
fprintf(stderr, "exiting\n");
}
return ret;
}
int main(int argc, char **argv)
{
int fd;
int opt;
const char *card = "/dev/dri/card0";
while ((opt = getopt(argc, argv, "c:")) != -1) {
switch (opt) {
case 'c':
card = optarg;
break;
}
}
// open the DRM device
fd = drm_open_dev_dumb(card);
// Prepare all connectors and CRTCs
modeset_prepare(fd, &modeset_list);
// Allocate buffers
modeset_alloc_fbs(modeset_list, 2);
// Allocate private data
for_each_output(out, modeset_list)
out->data = calloc(1, sizeof(struct flip_data));
// Set modes
modeset_set_modes(modeset_list);
// Draw color bar
modeset_main_loop(modeset_list, &page_flip_event);
// Free private data
for_each_output(out, modeset_list)
free(out->data);
// Free modeset data
modeset_cleanup(modeset_list);
close(fd);
fprintf(stderr, "exiting\n");
return 0;
}
