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Subject[PATCH v16 06/20] media: subdev: Require code change to enable [GS]_ROUTING
Date
Streams API is an experimental feature. To use Streams API, the user
needs to change a variable in v4l2-subdev.c and recompile the kernel.

This commit should be reverted when the Streams API is deemed ready for
production use.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
---
drivers/media/v4l2-core/v4l2-subdev.c | 13 +++++++++++++
1 file changed, 13 insertions(+)

diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c
index 61b429016a2f..c31b44800e39 100644
--- a/drivers/media/v4l2-core/v4l2-subdev.c
+++ b/drivers/media/v4l2-core/v4l2-subdev.c
@@ -23,6 +23,13 @@
#include <media/v4l2-fh.h>
#include <media/v4l2-ioctl.h>

+/*
+ * Streams API is an experimental feature. To use Streams API, set
+ * 'v4l2_subdev_enable_streams_api' to 1 below.
+ */
+
+static bool v4l2_subdev_enable_streams_api = 0;
+
/*
* Maximum stream ID is 63 for now, as we use u64 bitmask to represent a set
* of streams.
@@ -751,6 +758,9 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg,
struct v4l2_subdev_routing *routing = arg;
struct v4l2_subdev_krouting *krouting;

+ if (!v4l2_subdev_enable_streams_api)
+ return -ENOIOCTLCMD;
+
if (!(sd->flags & V4L2_SUBDEV_FL_STREAMS))
return -ENOIOCTLCMD;

@@ -778,6 +788,9 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg,
struct v4l2_subdev_krouting krouting = {};
unsigned int i;

+ if (!v4l2_subdev_enable_streams_api)
+ return -ENOIOCTLCMD;
+
if (!(sd->flags & V4L2_SUBDEV_FL_STREAMS))
return -ENOIOCTLCMD;

--
2.34.1
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