6.5-stable review patch. If anyone has any objections, please let me know.
------------------
From: Hans de Goede <hdegoede@xxxxxxxxxx>
commit 4800021c630210ea0b19434a1fb56ab16385f2b3 upstream.
Since the stream API is still experimental it is currently locked away
behind the internal, default disabled, v4l2_subdev_enable_streams_api flag.
Advertising V4L2_SUBDEV_CAP_STREAMS when the streams API is disabled
confuses userspace. E.g. it causes the following libcamera error:
ERROR SimplePipeline simple.cpp:1497 Failed to reset routes for
/dev/v4l-subdev1: Inappropriate ioctl for device
Don't report V4L2_SUBDEV_CAP_STREAMS when the streams API is disabled
to avoid problems like this.
Reported-by: Dennis Bonke <admin@xxxxxxxxxxxxxxx>
Fixes: 9a6b5bf4c1bb ("media: add V4L2_SUBDEV_CAP_STREAMS")
Cc: stable@xxxxxxxxxxxxxxx # for >= 6.3
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Acked-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/media/v4l2-core/v4l2-subdev.c | 7 +++++++
1 file changed, 7 insertions(+)
--- a/drivers/media/v4l2-core/v4l2-subdev.c
+++ b/drivers/media/v4l2-core/v4l2-subdev.c
@@ -517,6 +517,13 @@ static long subdev_do_ioctl(struct file
V4L2_SUBDEV_CLIENT_CAP_STREAMS;
int rval;
+ /*
+ * If the streams API is not enabled, remove V4L2_SUBDEV_CAP_STREAMS.
+ * Remove this when the API is no longer experimental.
+ */
+ if (!v4l2_subdev_enable_streams_api)
+ streams_subdev = false;
+
switch (cmd) {
case VIDIOC_SUBDEV_QUERYCAP: {
struct v4l2_subdev_capability *cap = arg;
