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

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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: 6448149792 ("drm/i915/backlight: Check Luminance based brightness control for VESA")
Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Reviewed-by: Arun R Murthy <arun.r.murthy@intel.com>
Link: https://lore.kernel.org/r/20250411060235.2732060-3-suraj.kandpal@intel.com
This commit is contained in:
Suraj Kandpal
2025-04-11 11:32:36 +05:30
parent cc2308ebbb
commit 6acbf71463
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c
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@@ -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);