drm/amd/display: CS_TFM_1D only applied post EOTF

[Why]
There's some unnecessary mem allocation for CS_TFM_ID. What's worse, it
depends on LUT size and since it's 4K for CS_TFM_1D, it is 16x bigger
than in regular case when it's actually needed. This leads to some
crashes in stress conditions.

[How]
Skip ramp combining designed for RGB256 and DXGI gamma with CS_TFM_1D.

Signed-off-by: Krunoslav Kovac <Krunoslav.Kovac@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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 369a89071217384f42b08427418653ea9f898c88..89a65e1d83176b4b254879a26f42eb41d0571bdc 100644 (file)
--- a/drivers/gpu/drm/amd/display/modules/color/color_gamma.c
+++ b/drivers/gpu/drm/amd/display/modules/color/color_gamma.c
@@ -1576,7 +1576,8 @@ bool mod_color_calculate_regamma_params(struct dc_transfer_func *output_tf,
 
        output_tf->type = TF_TYPE_DISTRIBUTED_POINTS;
 
-       if (ramp && (mapUserRamp || ramp->type != GAMMA_RGB_256)) {
+       if (ramp && ramp->type != GAMMA_CS_TFM_1D &&
+                       (mapUserRamp || ramp->type != GAMMA_RGB_256)) {
                rgb_user = kvcalloc(ramp->num_entries + _EXTRA_POINTS,
                            sizeof(*rgb_user),
                            GFP_KERNEL);