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From 0020aa18b2240e9649553c774ac99873b13d25f5 Mon Sep 17 00:00:00 2001
From: Yongqiang Sun <yongqiang.sun@amd.com>
Date: Thu, 15 Dec 2016 10:50:48 -0500
Subject: [PATCH 0068/4131] drm/amd/display: Add debug option to disable dmcu
Signed-off-by: Yongqiang Sun <yongqiang.sun@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/display/dc/dc.h | 1 +
drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c | 3 +++
2 files changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
index 4cb1948..c7905b3 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 c73d605..a8a2290 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
--
2.7.4
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