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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.

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>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
David Francis 2019-02-11 14:15:19 -05:00 committed by Alex Deucher
parent 87d44f62d5
commit f91813992c
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/amd/display/modules/color/color_gamma.c
View File

@ -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;