From b474a14fa531c7db2b36c2f43b66ebd24c698fb7 Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Mon, 19 Sep 2022 12:36:29 -0400
Subject: drm/amd/display: fix transfer function passed to build_coefficients()
Git-commit: a895014853ea6df2778533e2a0bb7a0d53f02ec2
Patch-mainline: v6.1-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225 jsc#PED-2849

The default argument should be enum TRANSFER_FUNCTION_SRGB rather than
the current boolean value which improperly maps to
TRANSFER_FUNCTION_BT709.

Commit 9b3d76527f6e ("drm/amd/display: Revert adding degamma coefficients")
looks to have improperly reverted
commit d02097095916 ("drm/amd/display: Add regamma/degamma coefficients and set sRGB when TF is BT709")
replacing the enum value with a boolean value.

Cc: Krunoslav Kovac <Krunoslav.Kovac@amd.com>
Cc: Jaehyun Chung <jaehyun.chung@amd.com>
Cc: Zeng Heng <zengheng4@huawei.com>
Fixes: 9b3d76527f6e ("drm/amd/display: Revert adding degamma coefficients")
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/amd/display/modules/color/color_gamma.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/modules/color/color_gamma.c b/drivers/gpu/drm/amd/display/modules/color/color_gamma.c
index 04f7656906ca..447a0ec9cbe2 100644
--- a/drivers/gpu/drm/amd/display/modules/color/color_gamma.c
+++ b/drivers/gpu/drm/amd/display/modules/color/color_gamma.c
@@ -1692,7 +1692,7 @@ static void apply_degamma_for_user_regamma(struct pwl_float_data_ex *rgb_regamma
 	struct pwl_float_data_ex *rgb = rgb_regamma;
 	const struct hw_x_point *coord_x = coordinates_x;
 
-	build_coefficients(&coeff, true);
+	build_coefficients(&coeff, TRANSFER_FUNCTION_SRGB);
 
 	i = 0;
 	while (i != hw_points_num + 1) {
-- 
2.38.1