ed0ccf349f
BIOS may leave a TypeC PHY in a connected state even though the corresponding port is disabled. This will prevent any hotplug events from being signalled (after the monitor deasserts and then reasserts its HPD) until the PHY is disconnected and so the driver will not detect a connected sink. Rebooting with the PHY in the connected state also results in a system hang. Fix the above by disconnecting TypeC PHYs on disabled ports. Before commit 64851a32c463e5 the PHY connected state was read out even for disabled ports and later the PHY got disconnected as a side effect of a tc_port_lock/unlock() sequence (during connector probing), hence recovering the port's hotplug functionality. Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/5014 Fixes: 64851a32c463 ("drm/i915/tc: Add a mode for the TypeC PHY's disconnected state") Cc: <stable@vger.kernel.org> # v5.16+ Cc: José Roberto de Souza <jose.souza@intel.com> Signed-off-by: Imre Deak <imre.deak@intel.com> Reviewed-by: José Roberto de Souza <jose.souza@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220217152237.670220-1-imre.deak@intel.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.