utils: ipc: Make first output parameter direct return if int32

To make it more convenient for synchronous IPA calls to return a status,
convert the first output into a direct return if it is an int32.

Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Naushir Patuck <naush@raspberrypi.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/utils/ipc/generators/libcamera_templates/module_ipa_proxy.cpp.tmpl b/utils/ipc/generators/libcamera_templates/module_ipa_proxy.cpp.tmpl
index 3eb3dced..f75b1206 100644
--- a/utils/ipc/generators/libcamera_templates/module_ipa_proxy.cpp.tmpl
+++ b/utils/ipc/generators/libcamera_templates/module_ipa_proxy.cpp.tmpl
@@ -209,7 +209,12 @@ void {{proxy_name}}::recvMessage(const IPCMessage &data)
 {%- endif %}
 	}
 {% if method|method_return_value != "void" %}
-	return IPADataSerializer<{{method.response_parameters|first|name}}>::deserialize(_ipcOutputBuf.data(), 0);
+	{{method|method_return_value}} _retValue = IPADataSerializer<{{method|method_return_value}}>::deserialize(_ipcOutputBuf.data(), 0);
+
+{{proxy_funcs.deserialize_call(method|method_param_outputs, '_ipcOutputBuf.data()', '_ipcOutputBuf.fds()', init_offset = method|method_return_value|byte_width|int)}}
+
+	return _retValue;
+
 {% elif method|method_param_outputs|length > 0 %}
 {{proxy_funcs.deserialize_call(method|method_param_outputs, '_ipcOutputBuf.data()', '_ipcOutputBuf.fds()')}}
 {% endif -%}