drm/i915: quirk asserts controllable backlight presence, overriding VBT

[firefly-linux-kernel-4.4.55.git] / drivers / gpu / drm / i915 / intel_panel.c

diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c
index 38a98570d10c864207d7f4ce7180a9795f30f9dc..628cd8938274ca44ff1a0c1efa0e338e5a05f9d0 100644 (file)
--- a/drivers/gpu/drm/i915/intel_panel.c
+++ b/drivers/gpu/drm/i915/intel_panel.c
@@ -1118,8 +1118,12 @@ int intel_panel_setup_backlight(struct drm_connector *connector)
        int ret;
 
        if (!dev_priv->vbt.backlight.present) {
-               DRM_DEBUG_KMS("native backlight control not available per VBT\n");
-               return 0;
+               if (dev_priv->quirks & QUIRK_BACKLIGHT_PRESENT) {
+                       DRM_DEBUG_KMS("no backlight present per VBT, but present per quirk\n");
+               } else {
+                       DRM_DEBUG_KMS("no backlight present per VBT\n");
+                       return 0;
+               }
        }
 
        /* set level and max in panel struct */