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| author | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2018-05-23 17:47:56 +0200 |
|---|---|---|
| committer | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2018-09-24 17:54:26 +0200 |
| commit | bf71544883a1ccb20021eb5139475496dbd8abd9 (patch) | |
| tree | e9614859bafc12c92acfa0ff9f09f27eb10fa939 /Documentation | |
| parent | usb: gadget: uvc: configfs: Allocate groups dynamically (diff) | |
| download | linux-bf71544883a1ccb20021eb5139475496dbd8abd9.tar.xz linux-bf71544883a1ccb20021eb5139475496dbd8abd9.zip | |
usb: gadget: uvc: configfs: Add interface number attributes
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 <function>/control/bInterfaceNumber and
<function>/streaming/bInterfaceNumber respectively.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/ABI/testing/configfs-usb-gadget-uvc | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/configfs-usb-gadget-uvc b/Documentation/ABI/testing/configfs-usb-gadget-uvc index 9281e2aa38df..490a0136fb02 100644 --- a/Documentation/ABI/testing/configfs-usb-gadget-uvc +++ b/Documentation/ABI/testing/configfs-usb-gadget-uvc @@ -12,6 +12,10 @@ Date: Dec 2014 KernelVersion: 4.0 Description: Control descriptors + All attributes read only: + bInterfaceNumber - USB interface number for this + streaming interface + What: /config/usb-gadget/gadget/functions/uvc.name/control/class Date: Dec 2014 KernelVersion: 4.0 @@ -109,6 +113,10 @@ Date: Dec 2014 KernelVersion: 4.0 Description: Streaming descriptors + All attributes read only: + bInterfaceNumber - USB interface number for this + streaming interface + What: /config/usb-gadget/gadget/functions/uvc.name/streaming/class Date: Dec 2014 KernelVersion: 4.0 |