From 8ce504b9389be846bcdf512ed5be8f661b3bf097 Mon Sep 17 00:00:00 2001
From: Murton Liu <murton.liu@amd.com>
Date: Wed, 17 Oct 2018 14:47:45 -0400
Subject: [PATCH] drm/amd/display: fix gamma not being applied correctly
Git-commit: 8ce504b9389be846bcdf512ed5be8f661b3bf097
Patch-mainline: v5.0-rc1
References: bsc#1111666
[why]
Gamma was always being set as identity on SDR monitor,
leading to no changes in gamma. This caused nightlight to
not apply correctly.
[how]
Added a default gamma structure to compare against
in the sdr case.
Signed-off-by: Murton Liu <murton.liu@amd.com>
Reviewed-by: Krunoslav Kovac <Krunoslav.Kovac@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
index a59b89b27583..84cfe709bdc2 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
@@ -1227,7 +1227,8 @@ static bool dcn10_set_input_transfer_func(struct pipe_ctx *pipe_ctx,
tf = plane_state->in_transfer_func;
if (plane_state->gamma_correction &&
- !plane_state->gamma_correction->is_identity
+ !dpp_base->ctx->dc->debug.always_use_regamma
+ && !plane_state->gamma_correction->is_identity
&& dce_use_lut(plane_state->format))
dpp_base->funcs->dpp_program_input_lut(dpp_base, plane_state->gamma_correction);
--
2.16.4