From: Eric Yang <Eric.Yang2@amd.com>
Date: Fri, 3 Nov 2017 16:21:37 -0400
Subject: drm/amd/display: always call set output tf
Git-commit: 35b71a3f6e5f81fe494e0ed8e82deb640ecfc6ec
Patch-mainline: v4.16-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

Temporary solution to fix gamma adjustment not
working.

Signed-off-by: Eric Yang <Eric.Yang2@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>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c |    8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
@@ -2058,8 +2058,14 @@ static void program_all_pipe_in_tree(
 
 		if (cur_pipe_ctx->plane_state != pipe_ctx->plane_state) {
 			dc->hwss.set_input_transfer_func(pipe_ctx, pipe_ctx->plane_state);
-			dc->hwss.set_output_transfer_func(pipe_ctx, pipe_ctx->stream);
 		}
+
+		/*
+		 * TODO: This can be further optimized/cleaned up
+		 * Always call this for now since it does memcmp inside before
+		 * doing heavy calculation and programming
+		 */
+		dc->hwss.set_output_transfer_func(pipe_ctx, pipe_ctx->stream);
 	}
 
 	if (dc->debug.sanity_checks) {