Commit d87dedb1 authored by Josip Pavic's avatar Josip Pavic Committed by Alex Deucher
Browse files

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: default avatarJosip Pavic <Josip.Pavic@amd.com>
Reviewed-by: default avatarKrunoslav Kovac <Krunoslav.Kovac@amd.com>
Acked-by: default avatarRodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 8d5bc3a5

drivers/gpu/drm/amd/display/modules/color/color_gamma.c

+4 −2
Original line number Diff line number Diff line
@@ -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]);



		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);