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Mali-DP650 supports warming up the SMMU translations, by sending requsts to the SMMU before a buffer is read. There are two modes supported: - PARTIAL: could be enabled when the buffer is composed of 4K or 64K pages, the display hardware will send a configurable number of requests before the actual reading. - FULL: could be enabled when the buffer is composed of 1M or 2M pages, the display hardware will send requests before reading for all pages composing the buffer. This patch adds a mechanism for detecting the page size and set the MMU prefetch mode if possible. Changes since v1: - For imported buffers use the already populated drm_gem_cma_object.sgt instead of calling driver.gem_prime_get_sg_table, which works just for buffers allocated through the gem_cma API. Signed-off-by: Jamie Fox <jamie.fox@arm.com> Signed-off-by: Alexandru Gheorghe <alexandru-cosmin.gheorghe@arm.com> Acked-by: Liviu Dudau <liviu.dudau@arm.com> [rebased and re-ordered functions] Signed-off-by: Liviu Dudau <liviu.dudau@arm.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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.