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From 9eb677d09c3c41e06e0371d9eafe259eb2f8913c Mon Sep 17 00:00:00 2001
From: "Leo (Sunpeng) Li" <sunpeng.li@amd.com>
Date: Thu, 29 Mar 2018 17:04:12 -0400
Subject: [PATCH 4024/4131] drm/amd/display: Fix dim display on DCE11
Before programming the input gamma, check that we're not using the
identity correction.
Signed-off-by: Leo (Sunpeng) Li <sunpeng.li@amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
---
drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
index 99d1922..f385b18 100644
--- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
@@ -280,7 +280,9 @@ dce110_set_input_transfer_func(struct pipe_ctx *pipe_ctx,
build_prescale_params(&prescale_params, plane_state);
ipp->funcs->ipp_program_prescale(ipp, &prescale_params);
- if (plane_state->gamma_correction && dce_use_lut(plane_state->format))
+ if (plane_state->gamma_correction &&
+ !plane_state->gamma_correction->is_identity &&
+ dce_use_lut(plane_state->format))
ipp->funcs->ipp_program_input_lut(ipp, plane_state->gamma_correction);
if (tf == NULL) {
--
2.7.4
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