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50575eb5b3
[Why&How] BT.2390 EETF is used for tone mapping/range reduction. Say display is 0.1 - 500 nits. The problematic case is when content is 0-400. We apply EETF because 0<0.1 so we need to reduce the range by 0.1. In the commit, we ignore the bottom range. Most displays map 0 to min and then have a ramp to 0.1, so sending 0.1 is actually >0.1. Furthermode, HW that uses 3D LUT also assumes min=0. Signed-off-by: Krunoslav Kovac <Krunoslav.Kovac@amd.com> Reviewed-by: Aric Cyr <Aric.Cyr@amd.com> Acked-by: Leo Li <sunpeng.li@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.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.