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Outstanding write counter in AFI is used to generate idle signal to dynamically gate the AFI clock. When there are 32 outstanding writes from AFI to memory, the outstanding write counter overflows and indicates that there are "0" outstanding write transactions. When memory controller is under heavy load, write completions to AFI gets delayed and AFI write counter overflows. This causes AFI clock gating even when there are outstanding transactions towards memory controller resulting in a system hang. Disable dynamic clock gating of AFI clock to avoid system hang. CLKEN_OVERRIDE bit is not defined in Tegra20 and Tegra30, however programming this bit doesn't cause any side effects. Program this bit for all Tegra SoCs to avoid conditional check. Signed-off-by: Manikanta Maddireddy <mmaddireddy@nvidia.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Acked-by: Thierry Reding <treding@nvidia.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.