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2ff0fb9474
stm32-dma3 driver refactors the linked-list in order to address the memory with the highest possible data width. It means that it can introduce up to 2 linked-list items. One with a transfer length multiple of channel maximum burst length and so with the highest possible data width. And an extra one with the latest bytes, with lower data width. Some devices (e.g. FMC ECC) don't support having several transfers instead of only one. So add the possibility to prevent linked-list refactoring, when bit 17 of the 'DMA transfer requirements' bit mask is set in device tree. When NOPACK feature is used (bit 16 pf the 'DMA transfer requirements' bit mask in device tree), linked-list refactoring can be avoided, since the memory data width and burst will be aligned with the device ones. Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com> Link: https://lore.kernel.org/r/20241016-dma3-mp25-updates-v3-5-8311fe6f228d@foss.st.com Signed-off-by: Vinod Koul <vkoul@kernel.org> |
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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.