From 1fdf7a4b1f96520467a578bdd9c90793cf7e8728 Mon Sep 17 00:00:00 2001 From: Vitaly Prosyak Date: Thu, 12 Jul 2018 14:26:47 -0500 Subject: [PATCH] drm/amd/display: Add check for num of entries in gamma This check avoids potential bugs related to gamma. Signed-off-by: Vitaly Prosyak Reviewed-by: Charlene Liu Acked-by: Bhawanpreet Lakha Signed-off-by: Alex Deucher --- 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 3d1b89a30b3b..15427f4fc990 100644 --- a/drivers/gpu/drm/amd/display/modules/color/color_gamma.c +++ b/drivers/gpu/drm/amd/display/modules/color/color_gamma.c @@ -1580,7 +1580,8 @@ bool mod_color_calculate_degamma_params(struct dc_transfer_func *input_tf, /* we can use hardcoded curve for plain SRGB TF */ if (input_tf->type == TF_TYPE_PREDEFINED && input_tf->tf == TRANSFER_FUNCTION_SRGB && - (!mapUserRamp && ramp->type == GAMMA_RGB_256)) + (!mapUserRamp && + (ramp->type == GAMMA_RGB_256 || ramp->num_entries == 0))) return true; input_tf->type = TF_TYPE_DISTRIBUTED_POINTS; -- 2.30.2