diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
index aeb0c3be24d69bf84de984afd8a02820686d2fbb..36f1c96605e81a15c857d546de3330e039b71d9a 100644
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -147,6 +147,7 @@ struct dc_debug {
 	bool disable_dfs_bypass;
 	bool disable_power_gate;
 	bool disable_clock_gate;
+	bool disable_dmcu;
 };
 
 struct dc {
diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c b/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c
index c73d6054cdda19af63915d96574a496fbc0d4f2d..a8a2290d47db22ae1bfe74db67ac3e9beb192567 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c
@@ -1821,6 +1821,9 @@ void dce110_link_encoder_init_dmcu_backlight_settings(
 	uint32_t s2;
 	uint32_t value;
 
+	if (enc->ctx->dc->debug.disable_dmcu)
+		return;
+
 	bl_pwm_cntl = REG_READ(BL_PWM_CNTL);
 
 	/* It must not be 0, so we have to restore them