From: Hugo Hu <hugo.hu@xxxxxxx>
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@xxxxxxx>
Reviewed-by: Krunoslav Kovac <Krunoslav.Kovac@xxxxxxx>
Acked-by: Leo Li <sunpeng.li@xxxxxxx>
---
drivers/gpu/drm/amd/display/modules/color/color_gamma.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/modules/color/color_gamma.c b/drivers/gpu/drm/amd/display/modules/color/color_gamma.c
index 8601d37..369a890 100644
--- a/drivers/gpu/drm/amd/display/modules/color/color_gamma.c
+++ b/drivers/gpu/drm/amd/display/modules/color/color_gamma.c
@@ -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;
}
--
2.7.4
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