drm/amd/display: Optimize programming front end

In case of update type is medium, optimize squence,
reduce programing time.

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>

drivers/gpu/drm/amd/display/dc/core/dc.c

@@ -1353,7 +1353,7 @@ static void commit_planes_for_stream(struct dc *dc,
 	for (j = 0; j < dc->res_pool->pipe_count; j++) {
 		struct pipe_ctx *pipe_ctx = &context->res_ctx.pipe_ctx[j];
 
-		if (update_type != UPDATE_TYPE_FULL || !pipe_ctx->plane_state)
+		if (update_type == UPDATE_TYPE_FAST || !pipe_ctx->plane_state)
 			continue;
 
 		if (!pipe_ctx->top_pipe &&
@@ -1374,26 +1374,20 @@ static void commit_planes_for_stream(struct dc *dc,
 	for (i = 0; i < surface_count; i++) {
 		struct dc_plane_state *plane_state = srf_updates[i].surface;
 
-		if (update_type == UPDATE_TYPE_MED)
-			dc->hwss.apply_ctx_for_surface(
-					dc, stream, surface_count, context);
-
 		for (j = 0; j < dc->res_pool->pipe_count; j++) {
 			struct pipe_ctx *pipe_ctx = &context->res_ctx.pipe_ctx[j];
 
-			if (pipe_ctx->plane_state != plane_state)
+			if (pipe_ctx->stream != stream)
 				continue;
 
-			if (srf_updates[i].flip_addr)
-				dc->hwss.update_plane_addr(dc, pipe_ctx);
-
-			if (update_type == UPDATE_TYPE_FAST)
+			if (pipe_ctx->plane_state != plane_state)
 				continue;
 
-			/* 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);
+			if (update_type == UPDATE_TYPE_FAST) {
+				if (srf_updates[i].flip_addr)
+					dc->hwss.update_plane_addr(dc, pipe_ctx);
+				continue;
+			}
 		}
 	}
 

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c

@@ -555,7 +555,7 @@ static void reset_back_end_for_pipe(
 					pipe_ctx->pipe_idx, pipe_ctx->stream_res.tg->inst);
 }
 
-void dcn10_verify_allow_pstate_change_high(struct dc *dc)
+static void dcn10_verify_allow_pstate_change_high(struct dc *dc)
 {
 	static bool should_log_hw_state; /* prevent hw state log by default */
 
@@ -1331,7 +1331,7 @@ static void dcn10_enable_per_frame_crtc_position_reset(
 	DC_SYNC_INFO("Multi-display sync is complete\n");
 }
 
-static void print_rq_dlg_ttu(
+/*static void print_rq_dlg_ttu(
 		struct dc *core_dc,
 		struct pipe_ctx *pipe_ctx)
 {
@@ -1452,13 +1452,13 @@ static void print_rq_dlg_ttu(
 			pipe_ctx->rq_regs.rq_regs_l.pte_row_height_linear
 			);
 }
+*/
 
 static void dcn10_enable_plane(
 	struct dc *dc,
 	struct pipe_ctx *pipe_ctx,
 	struct dc_state *context)
 {
-	struct dc_plane_state *plane_state = pipe_ctx->plane_state;
 	struct dce_hwseq *hws = dc->hwseq;
 
 	if (dc->debug.sanity_checks) {
@@ -1479,6 +1479,7 @@ static void dcn10_enable_plane(
 			OPP_PIPE_CLOCK_EN, 1);
 	/*TODO: REG_UPDATE(DENTIST_DISPCLK_CNTL, DENTIST_DPPCLK_WDIVIDER, 0x1f);*/
 
+/* TODO: enable/disable in dm as per update type.
 	if (plane_state) {
 		dm_logger_write(dc->ctx->logger, LOG_DC,
 				"Pipe:%d 0x%x: addr hi:0x%x, "
@@ -1514,6 +1515,7 @@ static void dcn10_enable_plane(
 				pipe_ctx->plane_res.scl_data.recout.y);
 		print_rq_dlg_ttu(dc, pipe_ctx);
 	}
+*/
 
 	if (dc->debug.sanity_checks) {
 		dcn10_verify_allow_pstate_change_high(dc);
@@ -1947,16 +1949,8 @@ static void program_all_pipe_in_tree(
 		struct pipe_ctx *pipe_ctx,
 		struct dc_state *context)
 {
-	unsigned int ref_clk_mhz = dc->res_pool->ref_clock_inKhz/1000;
-
 	if (pipe_ctx->top_pipe == NULL) {
 
-		/* lock otg_master_update to process all pipes associated with
-		 * this OTG. this is done only one time.
-		 */
-		/* watermark is for all pipes */
-		hubbub1_program_watermarks(dc->res_pool->hubbub, &context->bw.dcn.watermarks, ref_clk_mhz);
-
 		if (dc->debug.sanity_checks) {
 			/* pstate stuck check after watermark update */
 			dcn10_verify_allow_pstate_change_high(dc);
@@ -1979,17 +1973,6 @@ static void program_all_pipe_in_tree(
 
 		dcn10_enable_plane(dc, pipe_ctx, context);
 
-		/* temporary dcn1 wa:
-		 *   watermark update requires toggle after a/b/c/d sets are programmed
-		 *   if hubp is pg then wm value doesn't get properaged to hubp
-		 *   need to toggle after ungate to ensure wm gets to hubp.
-		 *
-		 * final solution:  we need to get SMU to do the toggle as
-		 * DCHUBBUB_ARB_WATERMARK_CHANGE_REQUEST is owned by SMU we should have
-		 * both driver and fw accessing same register
-		 */
-		hubbub1_toggle_watermark_change_req(dc->res_pool->hubbub);
-
 		update_dchubp_dpp(dc, pipe_ctx, context);
 
 		/* TODO: this is a hack w/a for switching from mpo to pipe split */
@@ -2101,6 +2084,7 @@ static void dcn10_apply_ctx_for_surface(
 	int i;
 	struct timing_generator *tg;
 	bool removed_pipe[4] = { false };
+	unsigned int ref_clk_mhz = dc->res_pool->ref_clock_inKhz/1000;
 
 	struct pipe_ctx *top_pipe_to_program =
 			find_top_pipe_for_stream(dc, context, stream);
@@ -2163,7 +2147,6 @@ static void dcn10_apply_ctx_for_surface(
 
 	tg->funcs->unlock(tg);
 
-
 	for (i = 0; i < dc->res_pool->pipe_count; i++) {
 		struct pipe_ctx *old_pipe_ctx =
 				&dc->current_state->res_ctx.pipe_ctx[i];
@@ -2172,6 +2155,19 @@ static void dcn10_apply_ctx_for_surface(
 			dcn10_disable_plane(dc, old_pipe_ctx);
 	}
 
+	if (dc->debug.sanity_checks) {
+		/* pstate stuck check after watermark update */
+		dcn10_verify_allow_pstate_change_high(dc);
+	}
+	/* watermark is for all pipes */
+	hubbub1_program_watermarks(dc->res_pool->hubbub,
+			&context->bw.dcn.watermarks, ref_clk_mhz);
+
+	if (dc->debug.sanity_checks) {
+		/* pstate stuck check after watermark update */
+		dcn10_verify_allow_pstate_change_high(dc);
+	}
+
 	dm_logger_write(dc->ctx->logger, LOG_BANDWIDTH_CALCS,
 			"\n============== Watermark parameters ==============\n"
 			"a.urgent_ns: %d \n"