diff options
| author | David Francis <David.Francis@amd.com> | 2018-07-12 15:46:41 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2018-08-06 14:35:25 -0500 |
| commit | 78e4405cec6cb0780b27b222685dde33934b38e4 (patch) | |
| tree | 6fa8772651eff98d82abad618374a3117bc4a948 /drivers/gpu/drm/amd/display/modules/color | |
| parent | d90e9a3bf5e747f0e3b0c8bec96d8699493f63ab (diff) | |
| download | linux-78e4405cec6cb0780b27b222685dde33934b38e4.tar.bz2 | |
drm/amd/display: Implement custom degamma lut on dcn
[Why]
Custom degamma lut functions are a feature we would
like to support on compatible hardware
[How]
In atomic check, convert from array of drm_color_lut to
dc_transfer_func. On hardware commit, allow for possibility
of custom degamma. Both are based on the equivalent
regamma pipeline.
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>
Diffstat (limited to 'drivers/gpu/drm/amd/display/modules/color')
| -rw-r--r-- | drivers/gpu/drm/amd/display/modules/color/color_gamma.c | 10 |
1 files changed, 7 insertions, 3 deletions
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 ee69c949bfbf..bf29733958c3 100644 --- a/drivers/gpu/drm/amd/display/modules/color/color_gamma.c +++ b/drivers/gpu/drm/amd/display/modules/color/color_gamma.c @@ -997,7 +997,9 @@ static void scale_user_regamma_ramp(struct pwl_float_data *pwl_rgb, * norm_y = 4095*regamma_y, and index is just truncating to nearest integer * lut1 = lut1D[index], lut2 = lut1D[index+1] * - *adjustedY is then linearly interpolating regamma Y between lut1 and lut2 + * adjustedY is then linearly interpolating regamma Y between lut1 and lut2 + * + * Custom degamma on Linux uses the same interpolation math, so is handled here */ static void apply_lut_1d( const struct dc_gamma *ramp, @@ -1018,7 +1020,7 @@ static void apply_lut_1d( struct fixed31_32 delta_lut; struct fixed31_32 delta_index; - if (ramp->type != GAMMA_CS_TFM_1D) + if (ramp->type != GAMMA_CS_TFM_1D && ramp->type != GAMMA_CUSTOM) return; // this is not expected for (i = 0; i < num_hw_points; i++) { @@ -1636,7 +1638,9 @@ bool mod_color_calculate_degamma_params(struct dc_transfer_func *input_tf, map_regamma_hw_to_x_user(ramp, coeff, rgb_user, coordinates_x, axix_x, curve, MAX_HW_POINTS, tf_pts, - mapUserRamp); + mapUserRamp && ramp->type != GAMMA_CUSTOM); + if (ramp->type == GAMMA_CUSTOM) + apply_lut_1d(ramp, MAX_HW_POINTS, tf_pts); ret = true; |