[PATCH 1/5] drm/amd/display: add hook for program_tg

[Melissa Wen]

The only actual difference between dcn20_program_pipe and
dcn401_program_pipe is the way they program global sync.  Create a hook
to enable hw-family function calls, so that we can reuse
dcn20_program_pipe, avoid code duplication and prevent future partial
fixes for the same portion of code.

Signed-off-by: Melissa Wen <mwen at igalia.com>
---
 .../gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c   | 11 ++++++++---
 drivers/gpu/drm/amd/display/dc/hwss/hw_sequencer.h    |  4 ++++
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c b/drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c
index 5e78b553adbd..1be9be74564e 100644
--- a/drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c
@@ -1925,9 +1925,14 @@ static void dcn20_program_pipe(
 	}
 
 	/* Only update TG on top pipe */
-	if (pipe_ctx->update_flags.bits.global_sync && !pipe_ctx->top_pipe
-		&& !pipe_ctx->prev_odm_pipe)
-		dcn20_program_tg(dc, pipe_ctx, context, hws);
+	if (pipe_ctx->update_flags.bits.global_sync &&
+	    !pipe_ctx->top_pipe &&
+	    !pipe_ctx->prev_odm_pipe) {
+		if(dc->hwss.program_tg)
+			dc->hwss.program_tg(dc, pipe_ctx, context, hws);
+		else
+			dcn20_program_tg(dc, pipe_ctx, context, hws);
+	}
 
 	if (pipe_ctx->update_flags.bits.odm)
 		hws->funcs.update_odm(dc, context, pipe_ctx);
diff --git a/drivers/gpu/drm/amd/display/dc/hwss/hw_sequencer.h b/drivers/gpu/drm/amd/display/dc/hwss/hw_sequencer.h
index 3a0795045bc6..86ffc7818df7 100644
--- a/drivers/gpu/drm/amd/display/dc/hwss/hw_sequencer.h
+++ b/drivers/gpu/drm/amd/display/dc/hwss/hw_sequencer.h
@@ -467,6 +467,10 @@ struct hw_sequencer_funcs {
 			struct dc_state *new_state,
 			struct pipe_ctx *old_pipe,
 			struct pipe_ctx *new_pipe);
+	void (*program_tg)(struct dc *dc,
+			   struct pipe_ctx *pipe_ctx,
+			   struct dc_state *context,
+			   struct dce_hwseq *hws);
 	void (*enable_plane)(struct dc *dc,
 			struct pipe_ctx *pipe_ctx,
 			struct dc_state *context);
-- 
2.47.2