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From 42add52df35a3eb337a2d1b26874f5cf633a3245 Mon Sep 17 00:00:00 2001
From: David Francis <David.Francis@amd.com>
Date: Mon, 11 Feb 2019 14:15:19 -0500
Subject: [PATCH 1539/2940] drm/amd/display: Re-add custom degamma support
[Why]
The dc_gamma_type CUSTOM_GAMMA is used to represent degamma
mappings passed in by drm. This type of gamma must be interpolated
into a transfer function by apply_1d_lut. The line in
mod_color_calculate_degamma_params that handled this case
was erroneously removed.
[How]
For CUSTOM_GAMMA degamma, calculate the lut as before.
Change-Id: I3d75fa94e19fdb25294a0784e949946cc8c58e4b
Signed-off-by: David Francis <David.Francis@amd.com>
Reviewed-by: Krunoslav Kovac <Krunoslav.Kovac@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
---
drivers/gpu/drm/amd/display/modules/color/color_gamma.c | 2 ++
1 file changed, 2 insertions(+)
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 0fbc8fbc3541..a1055413bade 100644
--- a/drivers/gpu/drm/amd/display/modules/color/color_gamma.c
+++ b/drivers/gpu/drm/amd/display/modules/color/color_gamma.c
@@ -1854,6 +1854,8 @@ bool mod_color_calculate_degamma_params(struct dc_transfer_func *input_tf,
coordinates_x, axis_x, curve,
MAX_HW_POINTS, tf_pts,
mapUserRamp && ramp && ramp->type == GAMMA_RGB_256);
+ if (ramp->type == GAMMA_CUSTOM)
+ apply_lut_1d(ramp, MAX_HW_POINTS, tf_pts);
ret = true;
--
2.17.1
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