drm/amd/display: Null check for gamma correction.

Signed-off-by: Yongqiang Sun <yongqiang.sun@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
index a3f84dc..e6f8227 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
@@ -900,7 +900,8 @@ static bool dcn10_set_input_transfer_func(struct pipe_ctx *pipe_ctx,
        if (plane_state->in_transfer_func)
                tf = plane_state->in_transfer_func;
 
-       if (plane_state->gamma_correction->is_identity)
+       if (plane_state->gamma_correction &&
+               plane_state->gamma_correction->is_identity)
                dpp_base->funcs->dpp_set_degamma(dpp_base, IPP_DEGAMMA_MODE_BYPASS);
        else if (plane_state->gamma_correction && dce_use_lut(plane_state->format))
                dpp_base->funcs->dpp_program_input_lut(dpp_base, plane_state->gamma_correction);