Add support for rockchip GPU stats (#17812)

* Set rockchip GPU name

* Add support for calculating rockchip GPU load

* Format consistently

* Fix access error

frigate/util/services.py

@@ -382,8 +382,29 @@ def get_intel_gpu_stats(sriov: bool) -> dict[str, str]:
         return results
 
 
+def get_rockchip_gpu_stats() -> dict[str, str]:
+    """Get GPU stats using rk."""
+    try:
+        with open("/sys/kernel/debug/rkrga/load", "r") as f:
+            content = f.read()
+    except FileNotFoundError:
+        return None
+
+    load_values = []
+    for line in content.splitlines():
+        match = re.search(r"load = (\d+)%", line)
+        if match:
+            load_values.append(int(match.group(1)))
+
+    if not load_values:
+        return None
+
+    average_load = f"{round(sum(load_values) / len(load_values), 2)}%"
+    return {"gpu": average_load, "mem": "-"}
+
+
 def get_rockchip_npu_stats() -> dict[str, str]:
-    """Get stats using rk."""
+    """Get NPU stats using rk."""
     try:
         with open("/sys/kernel/debug/rknpu/load", "r") as f:
             npu_output = f.read()