[ Upstream commit f91813992c343272813e707343b50f8d06383659 ]
[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 Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/amd/display/modules/color/color_gamma.c | 2 ++ 1 file changed, 2 insertions(+)
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 0fbc8fbc35416..a1055413bade6 100644 --- a/drivers/gpu/drm/amd/display/modules/color/color_gamma.c +++ b/drivers/gpu/drm/amd/display/modules/color/color_gamma.c @@ -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;