abe882a39a
[Why] HPD not going to be high if Panel VDD is off And all AUX transaction will fail :( [How] 1. Power on VDD before attempting detection if it isn't already on 2. Improve the robustness by having a retry mechanism on the first DPCD read after VDD on. If a particular board always holds HPD high incorrectly, the AUX access may fail, so we can retry in those scenarios. This change would only improve logic since it prevents AUX failure leading to bad resolution on internal panel. 3. We should never need to re-detect internal panel, so logic is re-arranged a bit to skip earlier. Signed-off-by: Anthony Koo <Anthony.Koo@amd.com> Reviewed-by: Jun Lei <Jun.Lei@amd.com> Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.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.