diff options
| author | Josip Pavic <Josip.Pavic@amd.com> | 2019-11-26 12:26:14 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2019-12-18 16:09:09 -0500 |
| commit | d87dedb1eca506adbb2647e96615676c2915952b (patch) | |
| tree | 88abd6dfda3368dd4ea02c764927e13264c7cbb2 /drivers/gpu/drm | |
| parent | 8d5bc3a5b8fec50ff175cf59a411723ae98b8317 (diff) | |
drm/amd/display: fix regamma build optimization
[Why]
When the global variable pow_buffer_ptr is set to -1, by definition
optimizations should not be used to build the regamma. Since
translate_from_linear_space unconditionally increments this global, it
inadvertently enables the optimization.
[How]
Increment pow_buffer_ptr only if it is not -1.
Signed-off-by: Josip Pavic <Josip.Pavic@amd.com>
Reviewed-by: Krunoslav Kovac <Krunoslav.Kovac@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/amd/display/modules/color/color_gamma.c | 6 |
1 files changed, 4 insertions, 2 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 b52c4d379651..1b278c42809a 100644 --- a/drivers/gpu/drm/amd/display/modules/color/color_gamma.c +++ b/drivers/gpu/drm/amd/display/modules/color/color_gamma.c @@ -364,8 +364,10 @@ static struct fixed31_32 translate_from_linear_space( scratch_2 = dc_fixpt_mul(gamma_of_2, pow_buffer[pow_buffer_ptr%16]); - pow_buffer[pow_buffer_ptr%16] = scratch_2; - pow_buffer_ptr++; + if (pow_buffer_ptr != -1) { + pow_buffer[pow_buffer_ptr%16] = scratch_2; + pow_buffer_ptr++; + } scratch_1 = dc_fixpt_mul(scratch_1, scratch_2); scratch_1 = dc_fixpt_sub(scratch_1, args->a2); |