linux.git/drivers/usb/gadget/function/f_uvc.c, branch v5.8

media: gadget: uvc: rename VFL_TYPE_GRABBER to _VIDEO

2020-02-24T15:52:45+00:00

'GRABBER' is a weird name, all other types map to the /dev
device names. Rename to 'VIDEO' to be consistent with the
other types.

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

media: usb/gadget/f_uvc: set device_caps in struct video_device

2019-06-05T12:47:44+00:00

Instead of filling in the struct v4l2_capability device_caps
field, fill in the struct video_device device_caps field.

That way the V4L2 core knows what the capabilities of the
video device are.

But this only really works if all drivers use this, so convert
this UVC gadget driver.

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

usb: gadget: uvc: Remove uvc_set_trace_param() function

2018-09-25T15:48:07+00:00

The function is never called, remove it.

Signed-off-by: Laurent Pinchart 
Reviewed-by: Kieran Bingham

usb: gadget: uvc: Replace plain printk() with dev_*()

2018-09-25T15:41:00+00:00

Adding device context to the kernel log messages make them more useful.
Add new uvcg_* macros based on dev_*() that print both the gadget device
name and the function name.

While at it, remove a commented out printk statement and an unused
printk-based macro.

Signed-off-by: Laurent Pinchart 
Reviewed-by: Paul Elder 
Tested-by: Paul Elder 
Reviewed-by: Kieran Bingham

usb: gadget: uvc: configfs: Add interface number attributes

2018-09-24T15:54:26+00:00

The video control and video streaming interface numbers are needed in
the UVC gadget userspace stack to reply to UVC requests. They are
hardcoded to fixed values at the moment, preventing configurations with
multiple functions.

To fix this, make them dynamically discoverable by userspace through
read-only configfs attributes in /control/bInterfaceNumber and
/streaming/bInterfaceNumber respectively.

Signed-off-by: Laurent Pinchart 
Reviewed-by: Kieran Bingham

usb: gadget: uvc: configfs: Allocate groups dynamically

2018-09-24T15:54:23+00:00

The UVC configfs implementation creates all groups as global static
variables. This prevents creation of multiple UVC function instances,
as they would all require their own configfs group instances.

Fix this by allocating all groups dynamically. To avoid duplicating code
around, extend the config_item_type structure with group name and
children, and implement helper functions to create children
automatically for most groups.

Signed-off-by: Laurent Pinchart 
Reviewed-by: Kieran Bingham

usb: gadget: uvc: Expose configuration name through video node

2018-07-26T10:43:18+00:00

When utilising multiple instantiations of a UVC gadget on a composite
device, there is no clear method to link a particular configuration to
its respective video node.

Provide a means for identifying the correct video node by exposing the
name of the function configuration through sysfs.

Reviewed-by: Laurent Pinchart 
Signed-off-by: Kieran Bingham 
Signed-off-by: Felipe Balbi

usb: gadget: uvc: Move trace parameter to function module

2018-07-26T10:33:48+00:00

The trace module parameter controls output of debugging messages in the
UVC function driver. Move it from the webcam module to the UVC function
module where it belongs. This allows ConfigFS-based UVC gadgets to
control tracing.

Signed-off-by: Laurent Pinchart 
Signed-off-by: Felipe Balbi

usb: gadget: uvc: Minimize #include in headers

2018-07-26T10:33:44+00:00

In order to speed up compilation, only include the headers that are
strictly required within other headers. To that end, use forward
structure declaration and move #include statements to .c file as
appropriate.

While at it, sort headers alphabetically, and remove unneeded __KERNEL__
guards.

Signed-off-by: Laurent Pinchart 
Signed-off-by: Felipe Balbi

USB: gadget: function: Remove redundant license text

2017-11-07T14:45:02+00:00

Now that the SPDX tag is in all USB files, that identifies the license
in a specific and legally-defined manner.  So the extra GPL text wording
can be removed as it is no longer needed at all.

This is done on a quest to remove the 700+ different ways that files in
the kernel describe the GPL license text.  And there's unneeded stuff
like the address (sometimes incorrect) for the FSF which is never
needed.

No copyright headers or other non-license-description text was removed.

Cc: Oliver Neukum 
Cc: Johan Hovold 
Cc: Jerry Zhang 
Cc: John Keeping 
Cc: Krzysztof Opasiak 
Cc: Abdulhadi Mohamed 
Cc: Matthew Wilcox 
Cc: Janusz Dziedzic 
Acked-by: Felipe Balbi 
Acked-by: Michal Nazarewicz 
Acked-by: Laurent Pinchart 
Acked-by: Vincent Pelletier 
Signed-off-by: Greg Kroah-Hartman