utils: codegen: controls.py: Parse direction information

In preparation for adding support for querying direction information
from controls, parse the direction information from control ID
definitions. This can later be plugged in directly to the IPA code
generators simply by using ctrl.direction.

Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com>

1 files changed, 23 insertions, 1 deletions

diff --git a/utils/codegen/controls.py b/utils/codegen/controls.py
index 03c77cc6..602f15b2 100644
--- a/utils/codegen/controls.py
+++ b/utils/codegen/controls.py
@@ -28,7 +28,7 @@ class ControlEnum(object):
 
 
 class Control(object):
-    def __init__(self, name, data, vendor):
+    def __init__(self, name, data, vendor, mode):
         self.__name = name
         self.__data = data
         self.__enum_values = None
@@ -60,6 +60,16 @@ class Control(object):
 
             self.__size = num_elems
 
+        if mode == 'properties':
+            self.__direction = 'out'
+        else:
+            direction = self.__data.get('direction')
+            if direction is None:
+                raise RuntimeError(f'Control `{self.__name}` missing required field `{direction}`')
+            if direction not in ['in', 'out', 'inout']:
+                raise RuntimeError(f'Control `{self.__name}` direction `{direction}` is invalid; must be one of `in`, `out`, or `inout`')
+            self.__direction = direction
+
     @property
     def description(self):
         """The control description"""
@@ -112,6 +122,18 @@ class Control(object):
             return f"Span<const {typ}>"
 
     @property
+    def direction(self):
+        in_flag = 'ControlId::Direction::In'
+        out_flag = 'ControlId::Direction::Out'
+
+        if self.__direction == 'inout':
+            return f'{in_flag} | {out_flag}'
+        if self.__direction == 'in':
+            return in_flag
+        if self.__direction == 'out':
+            return out_flag
+
+    @property
     def element_type(self):
         return self.__data.get('type')