Commit 6acbf714 authored by Suraj Kandpal's avatar Suraj Kandpal
Browse files

drm/i915/backlight: Modify condition to use panel luminance 



According to our internal spec we need to now check if both
panel luminance and smooth brightness are available in panel for
us to be able to change brightness using luminance value.

--v2
-Add Fixes tag [Ankit]

Fixes: 64481497 ("drm/i915/backlight: Check Luminance based brightness control for VESA")
Signed-off-by: default avatarSuraj Kandpal <suraj.kandpal@intel.com>
Reviewed-by: default avatarArun R Murthy <arun.r.murthy@intel.com>
Link: https://lore.kernel.org/r/20250411060235.2732060-3-suraj.kandpal@intel.com
parent cc2308eb

drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c

+2 −1
Original line number Diff line number Diff line
@@ -663,7 +663,8 @@ intel_dp_aux_supports_vesa_backlight(struct intel_connector *connector) 
	struct intel_dp *intel_dp = intel_attached_dp(connector);

	struct intel_panel *panel = &connector->panel;



	if ((intel_dp->edp_dpcd[3] & DP_EDP_PANEL_LUMINANCE_CONTROL_CAPABLE)) {

	if ((intel_dp->edp_dpcd[3] & DP_EDP_PANEL_LUMINANCE_CONTROL_CAPABLE) &&

	    (intel_dp->edp_dpcd[3] & DP_EDP_SMOOTH_BRIGHTNESS_CAPABLE)) {

		drm_dbg_kms(display->drm,

			    "[CONNECTOR:%d:%s] AUX Luminance Based Backlight Control Supported!\n",

			    connector->base.base.id, connector->base.name);