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backend/drm: fetch fresh legacy CRTC in connector_get_current_mode()

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connect_drm_connector() may be called long after create_drm_connector().
During that time the DRM mode might have changed. Avoid working with
stale information.
This commit is contained in:
Simon Ser 2022-12-15 19:26:20 +01:00
parent 7f6d646e0a
commit 8b18352318
1 changed files with 10 additions and 2 deletions
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12
backend/drm/drm.c
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@ -1215,15 +1215,23 @@ static drmModeModeInfo *connector_get_current_mode(struct wlr_drm_connector *wlr
return mode; return mode;
} else { } else {
// Fallback to the legacy API // Fallback to the legacy API
if (!wlr_conn->crtc->legacy_crtc->mode_valid) { drmModeCrtc *drm_crtc = drmModeGetCrtc(drm->fd, wlr_conn->crtc->id);
if (drm_crtc == NULL) {
wlr_log_errno(WLR_ERROR, "drmModeGetCrtc failed");
return NULL;
}
if (!drm_crtc->mode_valid) {
drmModeFreeCrtc(drm_crtc);
return NULL; return NULL;
} }
drmModeModeInfo *mode = malloc(sizeof(*mode)); drmModeModeInfo *mode = malloc(sizeof(*mode));
if (mode == NULL) { if (mode == NULL) {
wlr_log_errno(WLR_ERROR, "Allocation failed"); wlr_log_errno(WLR_ERROR, "Allocation failed");
drmModeFreeCrtc(drm_crtc);
return NULL; return NULL;
} }
*mode = wlr_conn->crtc->legacy_crtc->mode; *mode = drm_crtc->mode;
drmModeFreeCrtc(drm_crtc);
return mode; return mode;
} }
} }