drm/amd/display: implement notify stream mask

[Why]
Send stream active state info to DMUB

[How]
Implement GPINT to notify stream mask
Signed-off-by: Eric Yang <Eric.Yang2@amd.com>
Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -1246,6 +1246,19 @@ void dc_trigger_sync(struct dc *dc, struct dc_state *context)
 	}
 }
 
+static uint8_t get_stream_mask(struct dc *dc, struct dc_state *context)
+{
+	int i;
+	unsigned int stream_mask = 0;
+
+	for (i = 0; i < dc->res_pool->pipe_count; i++) {
+		if (context->res_ctx.pipe_ctx[i].stream)
+			stream_mask |= 1 << i;
+	}
+
+	return stream_mask;
+}
+
 /*
  * Applies given context to HW and copy it into current context.
  * It's up to the user to release the src context afterwards.
@@ -1362,6 +1375,11 @@ static enum dc_status dc_commit_state_no_check(struct dc *dc, struct dc_state *c
 		dc->hwss.optimize_bandwidth(dc, context);
 	}
 
+	context->stream_mask = get_stream_mask(dc, context);
+
+	if (context->stream_mask != dc->current_state->stream_mask)
+		dc_dmub_srv_notify_stream_mask(dc->ctx->dmub_srv, context->stream_mask);
+
 	for (i = 0; i < context->stream_count; i++)
 		context->streams[i]->mode_changed = false;
 

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

@@ -132,3 +132,19 @@ void dc_dmub_srv_wait_phy_init(struct dc_dmub_srv *dc_dmub_srv)
 		/* Continue spinning so we don't hang the ASIC. */
 	}
 }
+
+bool dc_dmub_srv_notify_stream_mask(struct dc_dmub_srv *dc_dmub_srv,
+				    unsigned int stream_mask)
+{
+	struct dmub_srv *dmub;
+	const uint32_t timeout = 30;
+
+	if (!dc_dmub_srv || !dc_dmub_srv->dmub)
+		return false;
+
+	dmub = dc_dmub_srv->dmub;
+
+	return dmub_srv_send_gpint_command(
+		       dmub, DMUB_GPINT__IDLE_OPT_NOTIFY_STREAM_MASK,
+		       stream_mask, timeout) == DMUB_STATUS_OK;
+}

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

@@ -56,4 +56,6 @@ void dc_dmub_srv_wait_idle(struct dc_dmub_srv *dc_dmub_srv);
 
 void dc_dmub_srv_wait_phy_init(struct dc_dmub_srv *dc_dmub_srv);
 
+bool dc_dmub_srv_notify_stream_mask(struct dc_dmub_srv *dc_dmub_srv,
+				    unsigned int stream_mask);
 #endif /* _DMUB_DC_SRV_H_ */

drivers/gpu/drm/amd/display/dc/inc/core_types.h

@@ -397,6 +397,7 @@ struct dc_state {
 	struct dc_stream_state *streams[MAX_PIPES];
 	struct dc_stream_status stream_status[MAX_PIPES];
 	uint8_t stream_count;
+	uint8_t stream_mask;
 
 	struct resource_context res_ctx;