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If a CRTC doesn't have a mode configured, use the preferred or largest mode as the default mode 

Fixes https://github.com/libsdl-org/SDL/issues/6421
This commit is contained in:
Sam Lantinga 2022-11-18 12:17:27 -08:00
parent ea4ea27a59
commit da9ba3a2a1
1 changed files with 29 additions and 6 deletions
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27
src/video/kmsdrm/SDL_kmsdrmvideo.c
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@ -666,8 +666,8 @@ KMSDRM_CrtcGetVrr(uint32_t drm_fd, uint32_t crtc_id)
/* Gets a DRM connector, builds an SDL_Display with it, and adds it to the
list of SDL Displays in _this->displays[] */
static void
KMSDRM_AddDisplay (_THIS, drmModeConnector *connector, drmModeRes *resources) {
KMSDRM_AddDisplay (_THIS, drmModeConnector *connector, drmModeRes *resources)
{
SDL_VideoData *viddata = ((SDL_VideoData *)_this->driverdata);
SDL_DisplayData *dispdata = NULL;
SDL_VideoDisplay display = {0};
@ -775,6 +775,29 @@ KMSDRM_AddDisplay (_THIS, drmModeConnector *connector, drmModeRes *resources) {
}
}
if (mode_index == -1) {
int current_area, largest_area = 0;
/* Find the preferred mode or the highest resolution mode */
for (i = 0; i < connector->count_modes; i++) {
drmModeModeInfo *mode = &connector->modes[i];
if (mode->type & DRM_MODE_TYPE_PREFERRED) {
mode_index = i;
break;
}
current_area = mode->hdisplay * mode->vdisplay;
if (current_area > largest_area) {
mode_index = i;
largest_area = current_area;
}
}
if (mode_index != -1) {
crtc->mode = connector->modes[mode_index];
}
}
if (mode_index == -1) {
ret = SDL_SetError("Failed to find index of mode attached to the CRTC.");
goto cleanup;