[SRU][R][PATCH 06/13] drm/i915/backlight: Take luminance_set into account for VESA backlight

[Werner Sembach]

From: Suraj Kandpal <suraj.kandpal at intel.com>

When deciding what functions to enable to help control backlight we
used to only check aux_enable. Now with PANEL_LUMINANCE_OVERRIDE in
picture we need to take care that we do not enable PWM function if
luminance_set is set.

Closes: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/15671
Signed-off-by: Suraj Kandpal <suraj.kandpal at intel.com>
Reviewed-by: Arun R Murthy <arun.r.murthy at intel.com>
Link: https://patch.msgid.link/20260302040613.3324049-4-suraj.kandpal@intel.com
Signed-off-by: Werner Sembach <wse at tuxedocomputers.com>
---
 drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c
index ca3e6b8eb3ece..b72535f893827 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c
@@ -486,7 +486,8 @@ intel_dp_aux_vesa_enable_backlight(const struct intel_crtc_state *crtc_state,
 	struct intel_panel *panel = &connector->panel;
 	struct intel_dp *intel_dp = enc_to_intel_dp(connector->encoder);
 
-	if (!panel->backlight.edp.vesa.info.aux_enable) {
+	if (!(panel->backlight.edp.vesa.info.aux_enable ||
+	      panel->backlight.edp.vesa.info.luminance_set)) {
 		u32 pwm_level;
 
 		if (!panel->backlight.edp.vesa.info.aux_set)
-- 
2.43.0