linux-stable.git/drivers/usb/gadget/function/f_uvc.c, branch linux-4.6.y

usb: gadget: f_uvc: eliminate abuse of ep->driver data

2015-09-27T15:54:31+00:00

Since ep->driver_data is not used for endpoint claiming, neither for
enabled/disabled state storing, we can reduce number of places where
we read or modify it's value, as now it has no particular meaning for
function or framework logic.

In case of f_uvc, ep->driver_data was used only for endpoint claiming
and marking endpoints as enabled, so we can simplify code by reducing
it.

Signed-off-by: Robert Baldyga 
Signed-off-by: Felipe Balbi

usb: gadget: f_uvc: use bind_deactivated flag

2015-07-29T14:59:20+00:00

Use bind_deactivated flag instead of calling usb_function_deactivate()
in function bind().

Signed-off-by: Robert Baldyga 
Signed-off-by: Felipe Balbi

[media] gadget/uvc: embed video_device

2015-04-03T02:36:20+00:00

Embed the video_device struct to simplify the error handling and in
order to (eventually) get rid of video_device_alloc/release.

Signed-off-by: Hans Verkuil 
Cc: Laurent Pinchart 
Signed-off-by: Mauro Carvalho Chehab

[media] uvc gadget: switch to v4l2 core locking

2015-03-02T20:05:23+00:00

Switch this driver over to the V4L2 core locking mechanism in preparation
for switching to unlocked_ioctl. Suggested by Laurent Pinchart.

This patch introduces a new mutex at the struct uvc_video level and
drops the old mutex at the queue level. The new lock is now used for all
ioctl locking and in the release file operation (the driver always has
to take care of locking in file operations, the core only serializes
ioctls).

Note that the mmap and get_unmapped_area file operations no longer take
a lock. Commit f035eb4e976ef5a059e30bc91cfd310ff030a7d3 fixed a AB-BA
deadlock by moving all the locking down into vb2, so the mmap and
get_unmapped_area file operations should no longer do any locking before
calling into vb2.

Signed-off-by: Hans Verkuil 
Acked-by: Laurent Pinchart 
Signed-off-by: Mauro Carvalho Chehab

usb: gadget: uvc: configfs support in uvc function

2015-01-12T18:13:26+00:00

Add support for using the uvc function as a component of USB gadgets composed
with configfs.

Acked-by: Laurent Pinchart 
Signed-off-by: Andrzej Pietrasiewicz 
Signed-off-by: Felipe Balbi

usb: gadget: uvc: verify descriptors presence

2015-01-12T18:13:26+00:00

If the caller of uvc_alloc() does not provide enough
descriptors, binding the function should fail, so appropriate
code is returned from uvc_copy_descriptors().

uvc_function_bind() is modified accordingly to account for possible
errors from uvc_copy_descriptors().

Signed-off-by: Andrzej Pietrasiewicz 
Acked-by: Laurent Pinchart 
Signed-off-by: Felipe Balbi

usb: gadget: f_uvc: rename a macro to avoid conflicts

2015-01-12T18:13:26+00:00

When configfs is integrated, CONFIGFS_ATTR_STRUCT and CONFIGFS_ATTR_OPS
macros should be used, but the latter expects that tere is a to_f_uvc_opts
function accepting a config_item, whereas the macro being changed
can be applied to a different type of argument.

Signed-off-by: Andrzej Pietrasiewicz 
Acked-by: Laurent Pinchart 
Signed-off-by: Felipe Balbi

usb: gadget: function: uvc: disable endpoints on ->disable()

2014-10-20T20:58:48+00:00

when our ->disable() method is called, we must
make sure to teardown all our resources, including
endpoints.

Signed-off-by: Felipe Balbi

usb: gadget: function: uvc: manage our video control endpoint

2014-10-20T20:58:48+00:00

just like any other endpoint, we must enable/disable
our video control endpoint based on calls to our
->set_alt() method.

Signed-off-by: Felipe Balbi

usb: gadget: function: uvc: return correct alt-setting

2014-10-20T20:58:48+00:00

If our alternate setting has been selected, we must
return that on a subsequent Get Interface request
even if we're not streaming.

Signed-off-by: Felipe Balbi