kernel/drivers/usb/gadget/function/u_uvc.h, branch linux-6.9.y

usb: gadget: webcam: Make g_webcam loadable again

2023-12-15T17:27:38Z

commit 588b9e85609b ("usb: gadget: uvc: add v4l2 enumeration api calls") has rendered the precomposed (aka legacy) webcam gadget unloadable. uvc_alloc() since then has depended on certain config groups being available in configfs tree related to the UVC function. However, legacy gadgets do not create anything in configfs, so uvc_alloc() must fail with -ENOENT no matter what. This patch mimics the required configfs hierarchy to satisfy the code which inspects formats and frames found in uvcg_streaming_header. This has been tested with guvcview on the host side, using vivid as a source of video stream on the device side and using the userspace program found at https://gitlab.freedesktop.org/camera/uvc-gadget.git. Signed-off-by: Andrzej Pietrasiewicz Fixes: 588b9e85609b ("usb: gadget: uvc: add v4l2 enumeration api calls") Link: https://lore.kernel.org/r/20231215131614.29132-1-andrzej.p@collabora.com Signed-off-by: Greg Kroah-Hartman

usb: gadget: uvc: Allow linking function to string descs

2023-02-07T07:46:37Z

Currently the string descriptors for the IAD and VideoStreaming Interfaces are hardcoded into f_uvc. Now that we can create arbitrary string descriptors, add a mechanism to define string descriptors for the IAD, VC and VS interfaces by linking to the appropriate directory at function level. Signed-off-by: Daniel Scally Link: https://lore.kernel.org/r/20230206161802.892954-11-dan.scally@ideasonboard.com Signed-off-by: Greg Kroah-Hartman

usb: gadget: uvc: Allow definition of XUs in configfs

2023-02-07T07:46:36Z

The UVC gadget at present has no support for extension units. Add the infrastructure to uvc_configfs.c that allows users to create XUs via configfs. These will be stored in a new child of uvcg_control_grp_type with the name "extensions". Reported-by: kernel test robot Signed-off-by: Daniel Scally Link: https://lore.kernel.org/r/20230206161802.892954-4-dan.scally@ideasonboard.com Signed-off-by: Greg Kroah-Hartman

usb: gadget: uvc: Remove the hardcoded default color matching

2023-02-06T12:46:42Z

A hardcoded default color matching descriptor is embedded in struct f_uvc_opts but no longer has any use - remove it. Reviewed-by: Laurent Pinchart Signed-off-by: Daniel Scally Link: https://lore.kernel.org/r/20230202114142.300858-5-dan.scally@ideasonboard.com Signed-off-by: Greg Kroah-Hartman

usb: gadget: uvc: Add new enable_interrupt_ep attribute

2023-02-02T10:16:17Z

Add a new attribute to the default control config group that allows users to specify whether they want to enable the optional interrupt endpoint for the VideoControl interface. Signed-off-by: Daniel Scally Link: https://lore.kernel.org/r/20230130105045.120886-3-dan.scally@ideasonboard.com Signed-off-by: Greg Kroah-Hartman

usb: gadget: uvc: allow changing interface name via configfs

2022-04-21T16:14:34Z

Add a configfs entry, "function_name", to change the iInterface field for VideoControl. This name is used on host devices for user selection, useful when multiple cameras are present. The default will remain "UVC Camera". Signed-off-by: Dan Vacura Link: https://lore.kernel.org/r/20220401160447.5919-1-w36195@motorola.com Signed-off-by: Greg Kroah-Hartman

USB: gadget: Use the correct style for SPDX License Identifier

2020-05-05T07:58:49Z

This patch corrects the SPDX License Identifier style in header files related to USB peripheral controller drivers. For C header files Documentation/process/license-rules.rst mandates C-like comments (opposed to C source files where C++ style should be used). Changes made by using a script provided by Joe Perches here: https://lkml.org/lkml/2019/2/7/46. Suggested-by: Joe Perches Signed-off-by: Nishad Kamdar Signed-off-by: Felipe Balbi

usb: gadget: Change Andrzej Pietrasiewicz's e-mail address

2019-02-11T09:12:29Z

My @samusung.com address is going to cease existing soon, so change it to an address which can actually be used to contact me. Signed-off-by: Andrzej Pietrasiewicz Signed-off-by: Felipe Balbi

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

2018-09-24T15:54:26Z

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: Move trace parameter to function module

2018-07-26T10:33:48Z

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