linux/drivers/usb/gadget
Ruslan Bilovol 24f779dac8 usb: gadget: f_uac2/u_audio: add feedback endpoint support
As per USB and UAC2 specs, asynchronous audio sink endpoint
requires explicit synchronization mechanism (Isochronous
Feedback Endpoint)

Implement feedback companion endpoint for ISO OUT endpoint

This patch adds all required infrastructure and USB requests
handling for feedback endpoint. Syncrhonization itself is
still dummy (feedback ep always reports 'nomimal frequency'
 e.g. no adjustement is needed). This satisfies hosts that
require feedback endpoint (like Win10) and poll it periodically

Actual synchronization mechanism should be implemented
separately

Signed-off-by: Ruslan Bilovol <ruslan.bilovol@gmail.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://lore.kernel.org/r/20210603220104.1216001-2-jbrunet@baylibre.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-09 11:26:49 +02:00
..
function usb: gadget: f_uac2/u_audio: add feedback endpoint support 2021-06-09 11:26:49 +02:00
legacy usb: gadget: prevent a ternary sign expansion bug 2021-04-22 13:17:29 +02:00
udc USB: UDC: Implement udc_async_callbacks in net2272 2021-06-04 13:52:09 +02:00
composite.c usb: gadget: composite: Report various SSP sublink speeds 2021-01-18 18:41:11 +01:00
config.c usb: gadget: Fix double free of device descriptor pointers 2021-04-22 08:57:48 +02:00
configfs.c usb: gadget: configfs: Fix KASAN use-after-free 2021-03-17 21:29:46 +01:00
configfs.h
epautoconf.c usb: gadget: move non-super speed code out of usb_ep_autoconfig_ss() 2019-02-07 13:14:51 +02:00
functions.c
Kconfig usb: gadget: select CONFIG_CRC32 2021-01-04 16:54:29 +01:00
Makefile Revert "usb:gadget Separated decoding functions from dwc3 driver." 2019-07-04 13:02:09 +02:00
u_f.c usb: gadget: Change Andrzej Pietrasiewicz's e-mail address 2019-02-11 11:12:29 +02:00
u_f.h USB: gadget: u_f: Unbreak offset calculation in VLAs 2020-08-27 09:25:06 +02:00
u_os_desc.h usb: gadget: Change Andrzej Pietrasiewicz's e-mail address 2019-02-11 11:12:29 +02:00
usbstring.c usb: gadget: fix langid kernel-doc warning in usbstring.c 2020-07-09 10:13:07 +03:00