[PATCH 2/4] utils: codegen: controls.py: Parse direction information

[Paul Elder]

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 at ideasonboard.com>
---
 utils/codegen/controls.py | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/utils/codegen/controls.py b/utils/codegen/controls.py
index 03c77cc64abe..bc1c655f1b9b 100644
--- a/utils/codegen/controls.py
+++ b/utils/codegen/controls.py
@@ -60,6 +60,15 @@ class Control(object):
 
             self.__size = num_elems
 
+        direction = self.__data.get('direction')
+        if direction is not None:
+            valid_values = ['in', 'out', 'inout']
+            if direction not in valid_values:
+                raise RuntimeError(f'Control `{self.__name}` direction `{direction}` is invalid; must be one of `in`, `out`, or `inout`')
+            self.__direction = direction
+        else:
+            self.__direction = 'inout'
+
     @property
     def description(self):
         """The control description"""
@@ -111,6 +120,18 @@ class Control(object):
         else:
             return f"Span<const {typ}>"
 
+    @property
+    def direction(self):
+        in_flag = 'static_cast<ControlId::DirectionFlags>(ControlId::Direction::In)'
+        out_flag = 'static_cast<ControlId::DirectionFlags>(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')
-- 
2.39.2