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drm/amd/display: Check ramp != NULL before applying lut1d for degamma

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[Why]
A NULL ramp is a valid configuration for passing into
mod_color_calculate_degamma_params but we'll hit a NULL pointer if we do
so.

We need this in order to get the right transfer function to do degamma
on NV12 formats where we aren't supplied with a custom user degamma.

[How]
Add the NULL check.

Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Zhan Liu <Zhan.Liu@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Nicholas Kazlauskas 2020-03-31 16:45:31 -04:00 committed by Alex Deucher
parent d1ebfdd8d0
commit d652509e7a
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/amd/display/modules/color/color_gamma.c
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@ -1902,7 +1902,7 @@ bool mod_color_calculate_degamma_params(struct dc_transfer_func *input_tf,
if (ramp->type == GAMMA_CUSTOM)
if (ramp && ramp->type == GAMMA_CUSTOM)
apply_lut_1d(ramp, MAX_HW_POINTS, tf_pts);
ret = true;