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backend/drm: Exit-early if 0 crtcs

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This fixes an assertion failure if we're using a device that has 0 crtcs
as a renderer.
This would happen on some laptops with discrete GPUs.
This commit is contained in:
Scott Anderson 2019-06-24 13:52:23 +12:00 • committed by Simon Ser
parent b3f42548d0
commit 46dc4100d6
1 changed files with 8 additions and 0 deletions
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8
backend/drm/drm.c
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@ -1140,6 +1140,14 @@ static uint32_t get_possible_crtcs(int fd, drmModeRes *res,
}
void scan_drm_connectors(struct wlr_drm_backend *drm) {
/*
* This GPU is not really a modesetting device.
* It's just being used as a renderer.
*/
if (drm->num_crtcs == 0) {
return;
}
wlr_log(WLR_INFO, "Scanning DRM connectors");
drmModeRes *res = drmModeGetResources(drm->fd);