drm/amd/display: Don't check registers, if using AUX BL control

From Swapnil Patel
b9971393d4c9be5eec3c6b30d9e312ba88c865ac in linux-6.1.y/6.1.56
f5b2c10b57615828b531bb0ae56bd6325a41167e in mainline linux

diff --git a/sys/dev/pci/drm/amd/display/dc/dce110/dce110_hw_sequencer.c b/sys/dev/pci/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
index bee7efa..e61d484 100644 (file)
--- a/sys/dev/pci/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
+++ b/sys/dev/pci/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
@@ -973,7 +973,9 @@ void dce110_edp_backlight_control(
                return;
        }
 
-       if (link->panel_cntl) {
+       if (link->panel_cntl && !(link->dpcd_sink_ext_caps.bits.oled ||
+               link->dpcd_sink_ext_caps.bits.hdr_aux_backlight_control == 1 ||
+               link->dpcd_sink_ext_caps.bits.sdr_aux_backlight_control == 1)) {
                bool is_backlight_on = link->panel_cntl->funcs->is_panel_backlight_on(link->panel_cntl);
 
                if ((enable && is_backlight_on) || (!enable && !is_backlight_on)) {