Commit 3601d620 authored by Yao Wang1's avatar Yao Wang1 Committed by Alex Deucher

drm/amd/display: Limit user regamma to a valid value

[Why]
For HDR mode, we get total 512 tf_point and after switching to SDR mode
we actually get 400 tf_point and the rest of points(401~512) still use
dirty value from HDR mode. We should limit the rest of the points to max
value.

[How]
Limit the value when coordinates_x.x > 1, just like what we do in
translate_from_linear_space for other re-gamma build paths.
Tested-by: default avatarDaniel Wheeler <daniel.wheeler@amd.com>
Reviewed-by: default avatarKrunoslav Kovac <Krunoslav.Kovac@amd.com>
Reviewed-by: default avatarAric Cyr <Aric.Cyr@amd.com>
Acked-by: default avatarPavle Kotarac <Pavle.Kotarac@amd.com>
Signed-off-by: default avatarYao Wang1 <Yao.Wang1@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent ceb75600
...@@ -1600,6 +1600,7 @@ static void interpolate_user_regamma(uint32_t hw_points_num, ...@@ -1600,6 +1600,7 @@ static void interpolate_user_regamma(uint32_t hw_points_num,
struct fixed31_32 lut2; struct fixed31_32 lut2;
struct fixed31_32 delta_lut; struct fixed31_32 delta_lut;
struct fixed31_32 delta_index; struct fixed31_32 delta_index;
const struct fixed31_32 one = dc_fixpt_from_int(1);
i = 0; i = 0;
/* fixed_pt library has problems handling too small values */ /* fixed_pt library has problems handling too small values */
...@@ -1628,6 +1629,9 @@ static void interpolate_user_regamma(uint32_t hw_points_num, ...@@ -1628,6 +1629,9 @@ static void interpolate_user_regamma(uint32_t hw_points_num,
} else } else
hw_x = coordinates_x[i].x; hw_x = coordinates_x[i].x;
if (dc_fixpt_le(one, hw_x))
hw_x = one;
norm_x = dc_fixpt_mul(norm_factor, hw_x); norm_x = dc_fixpt_mul(norm_factor, hw_x);
index = dc_fixpt_floor(norm_x); index = dc_fixpt_floor(norm_x);
if (index < 0 || index > 255) if (index < 0 || index > 255)
......
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