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31bf36387a
For Type-C to DP 4xlanes adapter, it is detected as
DP 2xlanes + USB3.0 DFP at the first time, and after
VDM negotiation completed, it can be detected as DP
4xlanes, in this case, the USBDP PHY needs to do mode
change in the udphy_power_on. During the mode change
process, the USBDP PHY will disable the PHY clocks
and assert the PHY reset, this also turn off the PIPE
clock which used for the source clock of the USB
controller. In order to safely disable the USBDP PHY,
it needs to select the UTMI clock instead of the PIPE
clock for the USB controller.
Fixes: 0b1d72b40c ("phy: rockchip: usbdp: Avoid access usb grf during dp phy power on")
Signed-off-by: William Wu <william.wu@rock-chips.com>
Change-Id: I5e055aa466af936a9a7fd1a59bbbe4ac8350a696
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.
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.