drm/amd/display: fix duplicate aux command with AMD aux backlight

when using AMD aux backlight control, we avoid sending backlight
update commands to DMUB firmware because it is controlled by aux commands
in driver.

Reviewed-by: Iswara Nagulendran <iswara.nagulendran@amd.com>
Reviewed-by: Aric Cyr <aric.cyr@amd.com>
Signed-off-by: Harry VanZyllDeJong <hvanzyll@amd.com>
Signed-off-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn31/dcn31_hwseq.c b/drivers/gpu/drm/amd/display/dc/hwss/dcn31/dcn31_hwseq.c
index b822f2dffff0eb75f5fe22503c7aa80f2c22b56d..d1ecdb92b072b1cbd8a92e205963b36489ebe1d0 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/hwss/dcn31/dcn31_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn31/dcn31_hwseq.c
@@ -710,7 +710,8 @@ bool dcn31_set_backlight_level(struct pipe_ctx *pipe_ctx,
                        panel_cntl->inst,
                        panel_cntl->pwrseq_inst);
 
-       dmub_abm_set_backlight(dc, backlight_level_params, panel_cntl->inst);
+       if (backlight_level_params->control_type != BACKLIGHT_CONTROL_AMD_AUX)
+               dmub_abm_set_backlight(dc, backlight_level_params, panel_cntl->inst);
 
        return true;
 }