ipc: Add support for thread hint function

src/xrt/ipc/client/ipc_client_compositor.c

@@ -772,6 +772,16 @@ ipc_compositor_discard_frame(struct xrt_compositor *xc, int64_t frame_id)
 	return res;
 }
 
+static xrt_result_t
+ipc_compositor_set_thread_hint(struct xrt_compositor *xc, enum xrt_thread_hint hint, uint32_t thread_id)
+{
+	struct ipc_client_compositor *icc = ipc_client_compositor(xc);
+
+	IPC_CALL_CHK(ipc_call_compositor_set_thread_hint(icc->ipc_c, hint, thread_id));
+
+	return res;
+}
+
 static void
 ipc_compositor_destroy(struct xrt_compositor *xc)
 {
@@ -810,6 +820,7 @@ ipc_compositor_init(struct ipc_client_compositor *icc, struct xrt_compositor_nat
 	icc->base.base.layer_commit_with_semaphore = ipc_compositor_layer_commit_with_semaphore;
 	icc->base.base.destroy = ipc_compositor_destroy;
 	icc->base.base.poll_events = ipc_compositor_poll_events;
+	icc->base.base.set_thread_hint = ipc_compositor_set_thread_hint;
 
 	// Using in wait frame.
 	os_precise_sleeper_init(&icc->sleeper);

src/xrt/ipc/server/ipc_server_handler.c

@@ -937,6 +937,21 @@ ipc_handle_compositor_poll_events(volatile struct ipc_client_state *ics, union x
 	return xrt_comp_poll_events(ics->xc, out_xce);
 }
 
+xrt_result_t
+ipc_handle_compositor_set_thread_hint(volatile struct ipc_client_state *ics,
+                                      enum xrt_thread_hint hint,
+                                      uint32_t thread_id)
+
+{
+	IPC_TRACE_MARKER();
+
+	if (ics->xc == NULL) {
+		return XRT_ERROR_IPC_SESSION_NOT_CREATED;
+	}
+
+	return xrt_comp_set_thread_hint(ics->xc, hint, thread_id);
+}
+
 xrt_result_t
 ipc_handle_system_get_clients(volatile struct ipc_client_state *_ics, struct ipc_client_list *list)
 {

src/xrt/ipc/shared/proto.json

@@ -189,6 +189,13 @@
 		]
 	},
 
+	"compositor_set_thread_hint": {
+		"in": [
+			{"name": "hint", "type": "enum xrt_thread_hint"},
+			{"name": "thread_id", "type": "uint32_t"}
+		]
+	},
+
 	"swapchain_get_properties": {
 		"in": [
 			{"name": "info", "type": "struct xrt_swapchain_create_info"}