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| author | Daniel Scally <dan.scally@ideasonboard.com> | 2023-02-06 16:17:54 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-02-07 08:46:36 +0100 |
| commit | 0525210c9840229e42c6b68e886c72a75a67cf8e (patch) | |
| tree | 8bb09e3e11994863acd734b4cf28f38591d96d03 /Documentation/ABI | |
| parent | 0df28607c5cb4fe60bba591e9858a8f7ba39aa4a (diff) | |
| download | linux-stable-0525210c9840229e42c6b68e886c72a75a67cf8e.tar.gz linux-stable-0525210c9840229e42c6b68e886c72a75a67cf8e.tar.bz2 linux-stable-0525210c9840229e42c6b68e886c72a75a67cf8e.zip | |
usb: gadget: uvc: Allow definition of XUs in configfs
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 <lkp@intel.com>
Signed-off-by: Daniel Scally <dan.scally@ideasonboard.com>
Link: https://lore.kernel.org/r/20230206161802.892954-4-dan.scally@ideasonboard.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/ABI')
| -rw-r--r-- | Documentation/ABI/testing/configfs-usb-gadget-uvc | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/configfs-usb-gadget-uvc b/Documentation/ABI/testing/configfs-usb-gadget-uvc index c2323f2b069b..80b98a4a4d0f 100644 --- a/Documentation/ABI/testing/configfs-usb-gadget-uvc +++ b/Documentation/ABI/testing/configfs-usb-gadget-uvc @@ -113,6 +113,34 @@ Description: Default processing unit descriptors bUnitID a non-zero id of this unit =============== ======================================== +What: /config/usb-gadget/gadget/functions/uvc.name/control/extensions +Date: Nov 2022 +KernelVersion: 6.1 +Description: Extension unit descriptors + +What: /config/usb-gadget/gadget/functions/uvc.name/control/extensions/name +Date: Nov 2022 +KernelVersion: 6.1 +Description: Extension Unit (XU) Descriptor + + bLength, bUnitID and iExtension are read-only. All others are + read-write. + + ================= ======================================== + bLength size of the descriptor in bytes + bUnitID non-zero ID of this unit + guidExtensionCode Vendor-specific code identifying the XU + bNumControls number of controls in this XU + bNrInPins number of input pins for this unit + baSourceID list of the IDs of the units or terminals + to which this XU is connected + bControlSize size of the bmControls field in bytes + bmControls list of bitmaps detailing which vendor + specific controls are supported + iExtension index of a string descriptor that describes + this extension unit + ================= ======================================== + What: /config/usb-gadget/gadget/functions/uvc.name/control/header Date: Dec 2014 KernelVersion: 4.0 |