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drm/amd/display: Don't use ROM for output TF if GAMMA_CS_TFM_1D

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We can’t use hardcoded SRGB ROM for output TF if we have GAMMA_CS_TFM_1D
(unless we know 1D LUT is identity), so we never want to return here early.
We apply the LUT part of ColorTransform3x4 only in apply_lut_1d() which is
called near the end of that function.

Signed-off-by: Hugo Hu <hugo.hu@amd.com>
Reviewed-by: Krunoslav Kovac <Krunoslav.Kovac@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Hugo Hu 2019-05-03 15:36:29 +08:00 committed by Alex Deucher
parent dc88b4a684
commit 821c65596b
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/amd/display/modules/color/color_gamma.c
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@ -1569,7 +1569,8 @@ bool mod_color_calculate_regamma_params(struct dc_transfer_func *output_tf,
output_tf->tf == TRANSFER_FUNCTION_SRGB) {
if (ramp == NULL)
return true;
if (ramp->is_identity || (!mapUserRamp && ramp->type == GAMMA_RGB_256))
if ((ramp->is_identity && ramp->type != GAMMA_CS_TFM_1D) ||
(!mapUserRamp && ramp->type == GAMMA_RGB_256))
return true;
}