[PATCH 25/26] drm/amd/display: CS_TFM_1D only applied post EOTF

[sunpeng.li at amd.com]

From: Krunoslav Kovac <Krunoslav.Kovac at amd.com>

[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 at amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr at amd.com>
Acked-by: Leo Li <sunpeng.li at amd.com>
---
 drivers/gpu/drm/amd/display/modules/color/color_gamma.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

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 369a890..89a65e1 100644
--- 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);
-- 
2.7.4