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The version of the dwc-otg core used in BCM2835 through BCM2712 only does whole-word writes, as well as needing the documented requirement for DMA buffers to start on a word boundary. Also, the alignment method used in the dwc2 driver doesn't handle the case where the URB has the NO_TRANSFER_DMA_MAP flag set, so reject buffers that have unaligned DMA start addresses. At least one whole page should be mapped, so the BCM283x whole-word-write bug should be benign in this case. Signed-off-by: Jonathan Bell <jonathan@raspberrypi.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.
Build status for rpi-6.1.y:
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