[PATCH] drm/i915/backlight: Honor VESA eDP backlight luminance control capability

[Aaron Ma]

The VESA AUX backlight failed to be enabled becaused luminance_set is
false always.
Fix it by using luminance support control capabitliy.

Fixes: e13af5166a359 ("drm/i915/backlight: Use drm helper to initialize edp 
backlight")
Signed-off-by: Aaron Ma <aaron...@canonical.com>
---
 drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c | 2 +-
 1 file changed, 1 insertion(+), 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 41228478b21c7..0a3a3f6a5f9d8 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c
@@ -546,7 +546,7 @@ static int intel_dp_aux_vesa_setup_backlight(struct 
intel_connector *connector,
                                     luminance_range->max_luminance,
                                     panel->vbt.backlight.pwm_freq_hz,
                                     intel_dp->edp_dpcd, &current_level, 
&current_mode,
-                                    false);
+                                    
panel->backlight.edp.vesa.luminance_control_support);
        if (ret < 0)
                return ret;
 
-- 
2.43.0