Commit 6ad34ade authored May 16, 2019 by Krunoslav Kovac Committed by Alex Deucher May 31, 2019

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>

parent 7316c4ad

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

+2 −1

Original line number	Diff line number	Diff line
		@@ -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);

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