For kernel versions that didn't define the V4L2_CTRL_FLAG_HAS_PAYLOAD
flag, commits 2f146567186f ("Implement compound control get support")
and 4480b561404f ("Implement compound control set support") broke string
control support. Fix this by emulating the V4L2_CTRL_FLAG_HAS_PAYLOAD
and compound control API for the older API.
Fixes: 2f146567186f ("Implement compound control get support")
Fixes: 4480b561404f ("Implement compound control set support")
Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
---
yavta.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/yavta.c b/yavta.c
index 0efa7d73e432..7d9c40c9f9be 100644
--- a/yavta.c
+++ b/yavta.c
@@ -637,6 +637,12 @@ static int query_control(struct device *dev, unsigned int id,
query->default_value = q.default_value;
query->flags = q.flags;
+ if (q.type == V4L2_CTRL_TYPE_STRING &&
+ !(q.flags & V4L2_CTRL_FLAG_HAS_PAYLOAD)) {
+ query->elem_size = q.maximum + 1;
+ query->elems = 1;
+ }
+
return 0;
}
--
Regards,
Laurent Pinchart
