Hello,
This patch series reworks the UVC gadget function configfs implementation to
support multiple UVC functions in a single device and
The first two patches simplify the code (01/08) and improve readability
(02/08).
The series then moves to dynamically allocating all configfs groups to support
multiple instances. It first fixes a config item reference leak (03/08) that
would cause a memory leak with dynamic allocation, and then allocate configfs
groups dynamically (04/08).
As a consequence we have to expose the interface numbers through new configfs
attributes (05/08) in order to let the userspace helper application discover
them. The next two patches add and document new bFormatIndex (06/08) and
bFrameIndex (07/08) configfs attributes to expose indices of UVC format and
frame descriptors to userspace, allowing their dynamic discovery.
The last patch finally fixes a bug that allowed modification of descriptors
after linking them (08/08).
Felipe, all this is based on top of your testing/next branch, and is a
candidate for v4.20. Please let me know if I should base the patches on a
different branch.
Changes since v1:
- Fix config items reference leak
- Free dynamically allocated configfs groups
- Squash attribute documentation and attribute creation patches
Joel Pepper (2):
usb: gadget: uvc: configfs: Add bFrameIndex attributes
usb: gadget: uvc: configfs: Prevent format changes after linking
header
Laurent Pinchart (6):
usb: gadget: uvc: configfs: Don't wrap groups unnecessarily
usb: gadget: uvc: configfs: Add section header comments
usb: gadget: uvc: configfs: Drop leaked references to config items
usb: gadget: uvc: configfs: Allocate groups dynamically
usb: gadget: uvc: configfs: Add interface number attributes
usb: gadget: uvc: configfs: Add bFormatIndex attributes
Documentation/ABI/testing/configfs-usb-gadget-uvc | 24 +
drivers/usb/gadget/function/f_uvc.c | 10 +-
drivers/usb/gadget/function/u_uvc.h | 3 +
drivers/usb/gadget/function/uvc_configfs.c | 926 +++++++++++++---------
4 files changed, 600 insertions(+), 363 deletions(-)
--
Regards,
Laurent Pinchart
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