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The RK356X DWC3 supports to set the USB 2.0 PHY enter suspend mode if the DWC3 core suspend conditions are valid (as per DWC3 controller databook 6.3.46 GUSB2PHYCFG register bit6). This cause xHC driver failed to send USB resume signal to USB 2.0 device in xhci_bus_resume(). This patch adds a quirk "xhci-u2-broken-suspend" to force the xHC to set the link state to XDEV_RESUME and send USB resume signal to USB 2.0 device. Change-Id: I24c017867f80728890c0562a12e4554625913e67 Signed-off-by: William Wu <william.wu@rock-chips.com>
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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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