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drm_common: skip cards that don't have connected outputs

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It's possible for systems to have multiple cards, and the first capable
card to not have a connected output. Skip such cards and continue
iterating until we find one with a connected output.
This commit is contained in:
llyyr 2023-08-14 19:14:16 +05:30 committed by sfan5
parent d2074fee0a
commit bf1e1a7961
1 changed files with 29 additions and 0 deletions
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29
video/out/drm_common.c
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@ -816,6 +816,24 @@ static bool card_supports_kms(const char *path)
return ret;
}
static bool card_has_connection(const char *path)
{
int fd = open_card_path(path);
bool ret = false;
if (fd != -1) {
drmModeRes *res = drmModeGetResources(fd);
if (res) {
drmModeConnector *connector = get_first_connected_connector(res, fd);
if (connector)
ret = true;
drmModeFreeConnector(connector);
drmModeFreeResources(res);
}
close(fd);
}
return ret;
}
static void get_primary_device_path(struct vo_drm_state *drm)
{
if (drm->opts->device_path) {
@ -865,6 +883,17 @@ static void get_primary_device_path(struct vo_drm_state *drm)
continue;
}
if (!card_has_connection(card_path)) {
if (card_no_given) {
MP_ERR(drm,
"DRM card number %d given, but it does not have any "
"connected outputs.\n", i);
break;
}
continue;
}
MP_VERBOSE(drm, "Picked DRM card %d, primary node %s%s.\n",
i, card_path,
card_no_given ? "" : " as the default");