drm/i915/backlight: Check luminance_set when disabling PWM via AUX VESA backlight

When deciding what if PWM funcs need to be disabled take into account
luminance_set too. We do this since it is also used to decide if
we are enabling PWM backlight funcs or not.

Closes: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/15671
Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Reviewed-by: Arun R Murthy <arun.r.murthy@intel.com>
Link: https://patch.msgid.link/20260302040613.3324049-5-suraj.kandpal@intel.com

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 b72535f893827f2d99d3ab74aa781a6b0994feae..8d7c5089fb1c4c68943b0935a4d4d6440254f7a8 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c
@@ -511,7 +511,8 @@ static void intel_dp_aux_vesa_disable_backlight(const struct drm_connector_state
 
        drm_edp_backlight_disable(&intel_dp->aux, &panel->backlight.edp.vesa.info);
 
-       if (!panel->backlight.edp.vesa.info.aux_enable)
+       if (!(panel->backlight.edp.vesa.info.aux_enable ||
+             panel->backlight.edp.vesa.info.luminance_set))
                panel->backlight.pwm_funcs->disable(old_conn_state,
                                                    intel_backlight_invert_pwm_level(connector, 0));
 }