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c577b2f43e
Add support for atomic update of gamma lut.
With this patch the "Night light" feature of gnome3
is working properly on mgag200.
v2:
- Add a default linear gamma function
- renamed functions with mgag200 prefix
- use format's 4cc code instead of bit depth
- use better interpolation for 16bits gamma
- remove legacy function mga_crtc_load_lut()
- can't remove the call to drm_mode_crtc_set_gamma_size()
because it doesn't work with userspace.
- other small refactors
v3:
- change mgag200_crtc_set_gamma*() argument
to struct drm_format_info *format
- fix printk format to %p4cc for 4cc and %zu for size_t
- rebased to drm-misc-next.
Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com>
Tested-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20220513084900.1832381-1-jfalempe@redhat.com
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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.