@@ -96,6 +96,14 @@
#define INTEL_EDP_BRIGHTNESS_OPTIMIZATION_1 0x359
+enum intel_dp_aux_backlight_modparam {
+ INTEL_DP_AUX_BACKLIGHT_AUTO = -1,
+ INTEL_DP_AUX_BACKLIGHT_OFF = 0,
+ INTEL_DP_AUX_BACKLIGHT_ON = 1,
+ INTEL_DP_AUX_BACKLIGHT_FORCE_VESA = 2,
+ INTEL_DP_AUX_BACKLIGHT_FORCE_INTEL = 3,
+};
+
/* Intel EDP backlight callbacks */
static bool
intel_dp_aux_supports_hdr_backlight(struct intel_connector *connector)
@@ -125,6 +133,24 @@ intel_dp_aux_supports_hdr_backlight(stru
return false;
}
+ /*
+ * If we don't have HDR static metadata there is no way to
+ * runtime detect used range for nits based control. For now
+ * do not use Intel proprietary eDP backlight control if we
+ * don't have this data in panel EDID. In case we find panel
+ * which supports only nits based control, but doesn't provide
+ * HDR static metadata we need to start maintaining table of
+ * ranges for such panels.
+ */
+ if (i915->params.enable_dpcd_backlight != INTEL_DP_AUX_BACKLIGHT_FORCE_INTEL &&
+ !(connector->base.hdr_sink_metadata.hdmi_type1.metadata_type &
+ BIT(HDMI_STATIC_METADATA_TYPE1))) {
+ drm_info(&i915->drm,
+ "Panel is missing HDR static metadata. Possible support for Intel HDR backlight interface is not used. If your backlight controls don't work try booting with i915.enable_dpcd_backlight=%d. needs this, please file a _new_ bug report on drm/i915, see " FDO_BUG_URL " for details.\n",
+ INTEL_DP_AUX_BACKLIGHT_FORCE_INTEL);
+ return false;
+ }
+
panel->backlight.edp.intel.sdr_uses_aux =
tcon_cap[2] & INTEL_EDP_SDR_TCON_BRIGHTNESS_AUX_CAP;
@@ -373,14 +399,6 @@ static const struct intel_panel_bl_funcs
.get = intel_dp_aux_vesa_get_backlight,
};
-enum intel_dp_aux_backlight_modparam {
- INTEL_DP_AUX_BACKLIGHT_AUTO = -1,
- INTEL_DP_AUX_BACKLIGHT_OFF = 0,
- INTEL_DP_AUX_BACKLIGHT_ON = 1,
- INTEL_DP_AUX_BACKLIGHT_FORCE_VESA = 2,
- INTEL_DP_AUX_BACKLIGHT_FORCE_INTEL = 3,
-};
-
int intel_dp_aux_init_backlight_funcs(struct intel_connector *connector)
{
struct drm_device *dev = connector->base.dev;