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backend/drm: Exit-early if 0 crtcs
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.
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1 changed files with 8 additions and 0 deletions
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@ -1140,6 +1140,14 @@ static uint32_t get_possible_crtcs(int fd, drmModeRes *res,
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}
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void scan_drm_connectors(struct wlr_drm_backend *drm) {
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/*
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* This GPU is not really a modesetting device.
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* It's just being used as a renderer.
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*/
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if (drm->num_crtcs == 0) {
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return;
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}
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wlr_log(WLR_INFO, "Scanning DRM connectors");
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drmModeRes *res = drmModeGetResources(drm->fd);
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