From: Brandon Syu <Brandon.Syu@amd.com>
Date: Wed, 10 Jun 2020 08:44:33 +0000 (+0800)
Subject: drm/amd/display: Keep current gain when ABM disable immediately
X-Git-Tag: v5.15~2586^2~30^2~55
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f0372d4f3f8d27599ee78fb036ca5404b954b944;p=platform%2Fkernel%2Flinux-starfive.git

drm/amd/display: Keep current gain when ABM disable immediately

[Why]
When system enters s3/s0i3, backlight PWM would set user level.

[How]
ABM disable function add keep current gain to avoid it.

Signed-off-by: Brandon Syu <Brandon.Syu@amd.com>
Reviewed-by: Josip Pavic <Josip.Pavic@amd.com>
Acked-by: Eryk Brol <eryk.brol@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/display/dc/dc_stream.h b/drivers/gpu/drm/amd/display/dc/dc_stream.h
index 3774307..c246af7 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_stream.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_stream.h
@@ -233,7 +233,7 @@ struct dc_stream_state {
 	union stream_update_flags update_flags;
 };
 
-#define ABM_LEVEL_IMMEDIATE_DISABLE 0xFFFFFFFF
+#define ABM_LEVEL_IMMEDIATE_DISABLE 255
 
 struct dc_stream_update {
 	struct dc_stream_state *stream;