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7399c13f61
Add support for DRM_FORMAT_C8 to vesadrm. The new pixel-format description PIXEL_FORMAT_C8 describes the layout. Vesadrm's helpers vesadrm_fill_palette_lut() and vesadrm_load_palette_lut() set the hardware palette according to the CRTC's output format. The driver emulates XRGB8888 by converting the source buffer to RGB332 and using the resulting 256 colors as index into the hardware palette. The hardware palette converts back to RGB during scanout. This has no overhead compared to other format conversion, but allows common userspace, such as Wayland compositors, to operate on the display. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Link: https://lore.kernel.org/r/20250714151513.309475-10-tzimmermann@suse.de |
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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.