drm/amd/display: wa to program split pipedegamma regs after mode set.

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/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index 33a63c7..09bab93 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -1282,7 +1282,9 @@ static void commit_planes_for_stream(struct dc *dc,
                        if (update_type == UPDATE_TYPE_FAST)
                                continue;
 
-                       if (srf_updates[i].in_transfer_func)
+                       /* work around to program degamma regs for split pipe after set mode. */
+                       if (srf_updates[i].in_transfer_func || (pipe_ctx->top_pipe &&
+                                       pipe_ctx->top_pipe->plane_state == pipe_ctx->plane_state))
                                dc->hwss.set_input_transfer_func(
                                                pipe_ctx, pipe_ctx->plane_state);