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4621e10e01
[Description] Today for MED update type we do not call update clocks. However, for FPO the assumption is that update clocks should be called to disable P-State switch before any HW programming since FPO in FW and driver are not synchronized. This causes an issue where on a MED update, an FPO P-State switch could be taking place, then driver forces P-State disallow in the below code and prevents FPO from completing the sequence. In this case we add a check to avoid re-programming (and thus re-setting) the P-State force register by only reprogramming if the pipe was not previously Subvp or FPO. The assumption is that the P-State force register should be programmed correctly the first time SubVP / FPO was enabled, so there's no need to update / reset it if the pipe config has never exited SubVP / FPO. Reviewed-by: Samson Tam <samson.tam@amd.com> Acked-by: Zaeem Mohamed <zaeem.mohamed@amd.com> Signed-off-by: Alvin Lee <alvin.lee2@amd.com> Tested-by: Daniel Wheeler <daniel.wheeler@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 reStructuredText 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.