drm/amd/display: decouple front and backend pgm using dpms_off as backend enable flag

Signed-off-by: Samson Tam <Samson.Tam@amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo@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

@@ -1270,6 +1270,9 @@ static enum surface_update_type check_update_surfaces_for_stream(
 
 		if (stream_update->abm_level)
 			return UPDATE_TYPE_FULL;
+
+		if (stream_update->dpms_off)
+			return UPDATE_TYPE_FULL;
 	}
 
 	for (i = 0 ; i < surface_count; i++) {
@@ -1324,6 +1327,71 @@ static struct dc_stream_status *stream_get_status(
 static const enum surface_update_type update_surface_trace_level = UPDATE_TYPE_FULL;
 
 
+static void commit_planes_do_stream_update(struct dc *dc,
+		struct dc_stream_state *stream,
+		struct dc_stream_update *stream_update,
+		enum surface_update_type update_type,
+		struct dc_state *context)
+{
+	int j;
+
+	// Stream updates
+	for (j = 0; j < dc->res_pool->pipe_count; j++) {
+		struct pipe_ctx *pipe_ctx = &context->res_ctx.pipe_ctx[j];
+
+		if (!pipe_ctx->top_pipe &&
+			pipe_ctx->stream &&
+			pipe_ctx->stream == stream) {
+
+			/* Fast update*/
+			// VRR program can be done as part of FAST UPDATE
+			if (stream_update->adjust)
+				dc->hwss.set_drr(&pipe_ctx, 1,
+					stream_update->adjust->v_total_min,
+					stream_update->adjust->v_total_max);
+
+			/* Full fe update*/
+			if (update_type == UPDATE_TYPE_FAST)
+				continue;
+
+			if (stream_update->dpms_off) {
+				if (*stream_update->dpms_off) {
+					core_link_disable_stream(pipe_ctx, KEEP_ACQUIRED_RESOURCE);
+					dc->hwss.pplib_apply_display_requirements(
+						dc, dc->current_state);
+				} else {
+					dc->hwss.pplib_apply_display_requirements(
+						dc, dc->current_state);
+					core_link_enable_stream(dc->current_state, pipe_ctx);
+				}
+			}
+
+			if (stream_update->abm_level && pipe_ctx->stream_res.abm) {
+				if (pipe_ctx->stream_res.tg->funcs->is_blanked) {
+					// if otg funcs defined check if blanked before programming
+					if (!pipe_ctx->stream_res.tg->funcs->is_blanked(pipe_ctx->stream_res.tg))
+						pipe_ctx->stream_res.abm->funcs->set_abm_level(
+							pipe_ctx->stream_res.abm, stream->abm_level);
+				} else
+					pipe_ctx->stream_res.abm->funcs->set_abm_level(
+						pipe_ctx->stream_res.abm, stream->abm_level);
+			}
+
+			if (stream_update->periodic_fn_vsync_delta &&
+				pipe_ctx->stream_res.tg->funcs->program_vline_interrupt)
+					pipe_ctx->stream_res.tg->funcs->program_vline_interrupt(
+						pipe_ctx->stream_res.tg, &pipe_ctx->stream->timing,
+						pipe_ctx->stream->periodic_fn_vsync_delta);
+
+			if (stream_update->hdr_static_metadata ||
+				stream_update->vrr_infopacket) {
+				resource_build_info_frame(pipe_ctx);
+				dc->hwss.update_info_frame(pipe_ctx);
+			}
+		}
+	}
+}
+
 static void commit_planes_for_stream(struct dc *dc,
 		struct dc_surface_update *srf_updates,
 		int surface_count,
@@ -1340,15 +1408,20 @@ static void commit_planes_for_stream(struct dc *dc,
 		context_clock_trace(dc, context);
 	}
 
+	// Stream updates
+	if (stream_update)
+		commit_planes_do_stream_update(dc, stream, stream_update, update_type, context);
+
 	if (surface_count == 0) {
 		/*
 		 * In case of turning off screen, no need to program front end a second time.
-		 * just return after program front end.
+		 * just return after program blank.
 		 */
-		dc->hwss.apply_ctx_for_surface(dc, stream, surface_count, context);
+		dc->hwss.apply_ctx_for_surface(dc, stream, 0, context);
 		return;
 	}
 
+	// Update Type FULL, Surface updates
 	for (j = 0; j < dc->res_pool->pipe_count; j++) {
 		struct pipe_ctx *pipe_ctx = &context->res_ctx.pipe_ctx[j];
 
@@ -1362,13 +1435,6 @@ static void commit_planes_for_stream(struct dc *dc,
 			if (!pipe_ctx->plane_state)
 				continue;
 
-			/* Fast update*/
-			// VRR program can be done as part of FAST UPDATE
-			if (stream_update && stream_update->adjust)
-				dc->hwss.set_drr(&pipe_ctx, 1,
-					stream_update->adjust->v_total_min,
-					stream_update->adjust->v_total_max);
-
 			/* Full fe update*/
 			if (update_type == UPDATE_TYPE_FAST)
 				continue;
@@ -1378,34 +1444,18 @@ static void commit_planes_for_stream(struct dc *dc,
 
 			dc->hwss.apply_ctx_for_surface(
 					dc, pipe_ctx->stream, stream_status->plane_count, context);
-
-			if (stream_update && stream_update->abm_level && pipe_ctx->stream_res.abm) {
-				if (pipe_ctx->stream_res.tg->funcs->is_blanked) {
-					// if otg funcs defined check if blanked before programming
-					if (!pipe_ctx->stream_res.tg->funcs->is_blanked(pipe_ctx->stream_res.tg))
-						pipe_ctx->stream_res.abm->funcs->set_abm_level(
-								pipe_ctx->stream_res.abm, stream->abm_level);
-				} else
-					pipe_ctx->stream_res.abm->funcs->set_abm_level(
-							pipe_ctx->stream_res.abm, stream->abm_level);
-			}
-
-			if (stream_update && stream_update->periodic_fn_vsync_delta &&
-					pipe_ctx->stream_res.tg->funcs->program_vline_interrupt)
-				pipe_ctx->stream_res.tg->funcs->program_vline_interrupt(
-						pipe_ctx->stream_res.tg, &pipe_ctx->stream->timing,
-						pipe_ctx->stream->periodic_fn_vsync_delta);
 		}
 	}
 
 	if (update_type == UPDATE_TYPE_FULL)
 		context_timing_trace(dc, &context->res_ctx);
 
+	// Update Type FAST, Surface updates
+	if (update_type == UPDATE_TYPE_FAST) {
 		/* Lock the top pipe while updating plane addrs, since freesync requires
 		 *  plane addr update event triggers to be synchronized.
 		 *  top_pipe_to_program is expected to never be NULL
 		 */
-	if (update_type == UPDATE_TYPE_FAST) {
 		dc->hwss.pipe_control_lock(dc, top_pipe_to_program, true);
 
 		/* Perform requested Updates */
@@ -1428,21 +1478,6 @@ static void commit_planes_for_stream(struct dc *dc,
 
 		dc->hwss.pipe_control_lock(dc, top_pipe_to_program, false);
 	}
-
-	if (stream && stream_update)
-		for (j = 0; j < dc->res_pool->pipe_count; j++) {
-			struct pipe_ctx *pipe_ctx =
-					&context->res_ctx.pipe_ctx[j];
-
-			if (pipe_ctx->stream != stream)
-				continue;
-
-			if (stream_update->hdr_static_metadata ||
-				(stream_update->vrr_infopacket)) {
-				resource_build_info_frame(pipe_ctx);
-				dc->hwss.update_info_frame(pipe_ctx);
-			}
-		}
 }
 
 void dc_commit_updates_for_stream(struct dc *dc,

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

@@ -2458,9 +2458,43 @@ void core_link_enable_stream(
 		struct pipe_ctx *pipe_ctx)
 {
 	struct dc  *core_dc = pipe_ctx->stream->ctx->dc;
+	struct dc_stream_state *stream = pipe_ctx->stream;
 	enum dc_status status;
 	DC_LOGGER_INIT(pipe_ctx->stream->ctx->logger);
 
+	if (pipe_ctx->stream->signal != SIGNAL_TYPE_VIRTUAL) {
+		stream->sink->link->link_enc->funcs->setup(
+			stream->sink->link->link_enc,
+			pipe_ctx->stream->signal);
+		pipe_ctx->stream_res.stream_enc->funcs->setup_stereo_sync(
+			pipe_ctx->stream_res.stream_enc,
+			pipe_ctx->stream_res.tg->inst,
+			stream->timing.timing_3d_format != TIMING_3D_FORMAT_NONE);
+	}
+
+	if (dc_is_dp_signal(pipe_ctx->stream->signal))
+		pipe_ctx->stream_res.stream_enc->funcs->dp_set_stream_attribute(
+			pipe_ctx->stream_res.stream_enc,
+			&stream->timing,
+			stream->output_color_space);
+
+	if (dc_is_hdmi_signal(pipe_ctx->stream->signal))
+		pipe_ctx->stream_res.stream_enc->funcs->hdmi_set_stream_attribute(
+			pipe_ctx->stream_res.stream_enc,
+			&stream->timing,
+			stream->phy_pix_clk,
+			pipe_ctx->stream_res.audio != NULL);
+
+	if (dc_is_dvi_signal(pipe_ctx->stream->signal))
+		pipe_ctx->stream_res.stream_enc->funcs->dvi_set_stream_attribute(
+			pipe_ctx->stream_res.stream_enc,
+			&stream->timing,
+			(pipe_ctx->stream->signal == SIGNAL_TYPE_DVI_DUAL_LINK) ?
+			true : false);
+
+	resource_build_info_frame(pipe_ctx);
+	core_dc->hwss.update_info_frame(pipe_ctx);
+
 	/* eDP lit up by bios already, no need to enable again. */
 	if (pipe_ctx->stream->signal == SIGNAL_TYPE_EDP &&
 		core_dc->apply_edp_fast_boot_optimization) {

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

@@ -1615,6 +1615,9 @@ static bool are_stream_backends_same(
 	if (is_hdr_static_meta_changed(stream_a, stream_b))
 		return false;
 
+	if (stream_a->dpms_off != stream_b->dpms_off)
+		return false;
+
 	return true;
 }
 
@@ -2716,6 +2719,9 @@ bool pipe_need_reprogram(
 	if (is_hdr_static_meta_changed(pipe_ctx_old->stream, pipe_ctx->stream))
 		return true;
 
+	if (pipe_ctx_old->stream->dpms_off != pipe_ctx->stream->dpms_off)
+		return true;
+
 	return false;
 }
 

drivers/gpu/drm/amd/display/dc/dc_stream.h

@@ -128,6 +128,8 @@ struct dc_stream_update {
 	unsigned long long *periodic_fn_vsync_delta;
 	struct dc_crtc_timing_adjust *adjust;
 	struct dc_info_packet *vrr_infopacket;
+
+	bool *dpms_off;
 };
 
 bool dc_is_stream_unchanged(

drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c

@@ -1349,8 +1349,6 @@ static enum dc_status apply_single_controller_ctx_to_hw(
 		struct dc *dc)
 {
 	struct dc_stream_state *stream = pipe_ctx->stream;
-	struct pipe_ctx *pipe_ctx_old = &dc->current_state->res_ctx.
-			pipe_ctx[pipe_ctx->pipe_idx];
 
 	if (pipe_ctx->stream_res.audio != NULL) {
 		struct audio_output audio_output;
@@ -1405,46 +1403,12 @@ static enum dc_status apply_single_controller_ctx_to_hw(
 			stream->timing.display_color_depth,
 			pipe_ctx->stream->signal);
 
-	if (pipe_ctx->stream->signal != SIGNAL_TYPE_VIRTUAL)
-		stream->sink->link->link_enc->funcs->setup(
-			stream->sink->link->link_enc,
-			pipe_ctx->stream->signal);
-
-	if (pipe_ctx->stream->signal != SIGNAL_TYPE_VIRTUAL)
-		pipe_ctx->stream_res.stream_enc->funcs->setup_stereo_sync(
-		pipe_ctx->stream_res.stream_enc,
-		pipe_ctx->stream_res.tg->inst,
-		stream->timing.timing_3d_format != TIMING_3D_FORMAT_NONE);
-
-
 	pipe_ctx->stream_res.opp->funcs->opp_program_fmt(
 		pipe_ctx->stream_res.opp,
 		&stream->bit_depth_params,
 		&stream->clamping);
 
-	if (dc_is_dp_signal(pipe_ctx->stream->signal))
+	if (!stream->dpms_off)
-		pipe_ctx->stream_res.stream_enc->funcs->dp_set_stream_attribute(
-			pipe_ctx->stream_res.stream_enc,
-			&stream->timing,
-			stream->output_color_space);
-
-	if (dc_is_hdmi_signal(pipe_ctx->stream->signal))
-		pipe_ctx->stream_res.stream_enc->funcs->hdmi_set_stream_attribute(
-			pipe_ctx->stream_res.stream_enc,
-			&stream->timing,
-			stream->phy_pix_clk,
-			pipe_ctx->stream_res.audio != NULL);
-
-	if (dc_is_dvi_signal(pipe_ctx->stream->signal))
-		pipe_ctx->stream_res.stream_enc->funcs->dvi_set_stream_attribute(
-			pipe_ctx->stream_res.stream_enc,
-			&stream->timing,
-			(pipe_ctx->stream->signal == SIGNAL_TYPE_DVI_DUAL_LINK) ?
-			true : false);
-
-	resource_build_info_frame(pipe_ctx);
-	dce110_update_info_frame(pipe_ctx);
-	if (!pipe_ctx_old->stream)
 		core_link_enable_stream(context, pipe_ctx);
 
 	pipe_ctx->plane_res.scl_data.lb_params.alpha_en = pipe_ctx->bottom_pipe != 0;