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[media] v4l2-subdev: allow subdev to send an event to the v4l2_device notify function

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All drivers use custom notifications, in particular when source changes.
The bridge only has to map the subdev that sends it to whatever video node it is connected to.

Signed-off-by: Jean-Michel Hautbois <jean-michel.hautbois@vodalys.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
jean-michel.hautbois@vodalys.com 2015-03-18 07:21:47 -03:00 committed by Mauro Carvalho Chehab
parent ce0eff016f
commit 17e484686b
2 changed files with 6 additions and 0 deletions
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4
Documentation/video4linux/v4l2-framework.txt
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@ -1129,6 +1129,10 @@ available event type is 'class base + 1'.
An example on how the V4L2 events may be used can be found in the OMAP An example on how the V4L2 events may be used can be found in the OMAP
3 ISP driver (drivers/media/platform/omap3isp). 3 ISP driver (drivers/media/platform/omap3isp).
A subdev can directly send an event to the v4l2_device notify function with
V4L2_DEVICE_NOTIFY_EVENT. This allows the bridge to map the subdev that sends
the event to the video node(s) associated with the subdev that need to be
informed about such an event.
V4L2 clocks V4L2 clocks
----------- -----------

2
include/media/v4l2-subdev.h
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@ -40,6 +40,8 @@
#define V4L2_SUBDEV_IR_TX_NOTIFY _IOW('v', 1, u32) #define V4L2_SUBDEV_IR_TX_NOTIFY _IOW('v', 1, u32)
#define V4L2_SUBDEV_IR_TX_FIFO_SERVICE_REQ 0x00000001 #define V4L2_SUBDEV_IR_TX_FIFO_SERVICE_REQ 0x00000001
#define V4L2_DEVICE_NOTIFY_EVENT _IOW('v', 2, struct v4l2_event)
struct v4l2_device; struct v4l2_device;
struct v4l2_ctrl_handler; struct v4l2_ctrl_handler;
struct v4l2_event_subscription; struct v4l2_event_subscription;