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drm/amd/display: handle empty LUTs in __set_input_tf

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Unlike degamma, blend gamma doesn't support hardcoded curve
(predefined/ROM), but we can use AMD color module to fill blend gamma
parameters when we have non-linear plane gamma TF without plane gamma
LUT. The regular degamma path doesn't hit this.

Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Joshua Ashton <joshua@froggi.es>
Signed-off-by: Melissa Wen <mwen@igalia.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Joshua Ashton 2023-11-16 18:58:06 -01:00 committed by Alex Deucher
parent 486c95af5d
commit 8d26795ae6
1 changed files with 12 additions and 8 deletions
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20
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c
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@ -578,17 +578,21 @@ static int __set_input_tf(struct dc_transfer_func *func,
struct dc_gamma *gamma = NULL;
bool res;
gamma = dc_create_gamma();
if (!gamma)
return -ENOMEM;
if (lut_size) {
gamma = dc_create_gamma();
if (!gamma)
return -ENOMEM;
gamma->type = GAMMA_CUSTOM;
gamma->num_entries = lut_size;
gamma->type = GAMMA_CUSTOM;
gamma->num_entries = lut_size;
__drm_lut_to_dc_gamma(lut, gamma, false);
__drm_lut_to_dc_gamma(lut, gamma, false);
}
res = mod_color_calculate_degamma_params(NULL, func, gamma, true);
dc_gamma_release(&gamma);
res = mod_color_calculate_degamma_params(NULL, func, gamma, gamma != NULL);
if (gamma)
dc_gamma_release(&gamma);
return res ? 0 : -ENOMEM;
}