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Phil Elwell efb04b6b03 fixup! dmaengine: dw-axi-dmac: Add DMA channel selection
Simplify and improve the channel selection scheme by removing the
concept of excluded channels. Requesting more channels than are
available is a configuration error, but otherwise it is better to get
a non-ideal channel than no channel at all.

Give each channel a score based on how well it matches the client's
requirements, then attempt to claim them in order of decreasing score.
A channel which possesses a required flag is scored more highly than one
that doesn't, but not having a trait that isn't wanted also contributes
to a channel's score, just less so.

By walking the list until the end, even channels that don't match at all
will be allocated if there is enough demand.

Signed-off-by: Phil Elwell <phil@raspberrypi.com>
2025-10-16 13:34:07 +01:00
2025-10-12 12:57:17 +02:00
2024-09-01 20:43:24 -07:00
2025-10-12 12:57:16 +02:00
2025-03-13 13:01:42 +01:00
2024-11-07 14:14:59 -08:00
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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 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: Pi kernel build tests dtoverlaycheck

Build status for rpi-6.6.y: Pi kernel build tests dtoverlaycheck

Build status for rpi-6.12.y: Pi kernel build tests dtoverlaycheck

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