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Originally the port drivers were expected to check does the connector have the mode enabled or disabled when the alt mode drivers attempted to enter the mode, but since typec_altmode_enter() puts the connector into USB Safe State before calling the port driver, it really has to do the check on its own, and before changing the state. Otherwise the connector may be left in USB Safe State if the port driver does not move it back to normal USB operation when the mode is disabled. Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Link: https://lore.kernel.org/r/20191230142611.24921-2-heikki.krogerus@linux.intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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.