William Wu 6ad580141f usb: xhci: fix u2 bus suspend for Rockchip SNPS 3.0 xHC
Rockchip SNPS xHC 3.0 set USB 2.0 PHY enter suspend mode
from DWC3 core if the suspend conditions are valid (as per
DWC3 controller databook 6.3.46 GUSB2PHYCFG register bit6).
In this case, it needs to set the bus_suspended bit for
USB 2.0, so that in xhci_bus_resume, it can set the xHC
link state to XDEV_RESUME and send USB resume signal to
USB 2.0 device.

Test on RK3568 USB 3.0 Host interface with USB 2.0 Camera
or USB 2.0 HUB which support USB auto suspend. Without this
patch, the xHC fails to send USB resume signal on the USB
bus to wakeup the USB 2.0 devices, and cause xHC died.

Change-Id: Icb5a553d71a5f3144d77f8d5a5132892a5795285
Signed-off-by: William Wu <william.wu@rock-chips.com>
2021-03-30 15:23:06 +08:00
2019-02-10 00:33:21 +08:00
2019-02-10 00:33:21 +08:00
2019-02-10 00:33:21 +08:00
2019-08-29 19:45:37 +08:00
2019-08-29 19:45:37 +08:00

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.
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