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In DPTX Controller, when hpd signal is low, the hpd state will change to unplug immediately. if the low level signal is less than 2ms, the hpd state will change to plug state and trigger a hpd irq interrupt. In some case, driver will detect hpd state to get the plug/unplug info when a hpd irq is coming. A hpd irq may be regard as a unplug state. To avoid this issue, it better to wait the hpd state change to the nest state. Change-Id: I68c5bdc72128a2bc3ea990cfcb54e2ade755abc7 Signed-off-by: Zhang Yubing <yubing.zhang@rock-chips.com>
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.