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[5.8,034/186] drm/amd/display: Keep current gain when ABM disable immediately

Message ID 20200908152243.331005239@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman Sept. 8, 2020, 3:22 p.m. UTC 
From: Brandon Syu <Brandon.Syu@amd.com>

[ Upstream commit cba4b52e431e5de3d8012281cfe194f1c39a9052 ]

[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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/amd/display/dc/dc_stream.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/drivers/gpu/drm/amd/display/dc/dc_stream.h b/drivers/gpu/drm/amd/display/dc/dc_stream.h
index 49aad691e687e..ccac2315a903a 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_stream.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_stream.h
@@ -222,7 +222,7 @@  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;