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Dave Stevenson ce55783b54 drm/vc4: Add algorithmic handling for SAND
The SAND handling had been using what was believed to be a runtime
parameter in the modifier, however that has been clarified that
all permitted variants of the modifier must be advertised, so
making it variable wasn't practical.

With a rationalisation of how the producers of this format are
configured, we can switch to a variant that doesn't have as much
variation, and can be configured such that only 2 options are
required.

Add a modifier with value 0 to denote that the height of the luma
column matches the buffer height, and chroma column will be half
that due to YUV420.
A modifier of 1 denotes that the height of the luma column still
matches the buffer height, but the chroma column height is the same.
This can be used to replicate the previous behaviour.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
2025-12-01 12:28:05 +00:00
2025-12-01 12:28:00 +00:00
2025-12-01 12:27:52 +00:00
2025-02-19 14:53:27 -07:00
2025-11-30 14:42:10 -08:00
2024-03-18 03:36:32 -06:00

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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