Paul Kocialkowski 411e83069e
drm/sun4i: frontend: Apply format sub-sampling to CH1 dimensions
The frontend comes with two "channels", that can be configured
independently. When used in YUV mode, the first channel (CH0) represents
the luminance component while the second channel (CH1) represents the
chrominance. In RGB mode, both have to be configured the same way.

Use variables (with the YUV terminology) for each channel's
dimensions, calculating the chroma dimensions from the luma dimensions
and the sub-sampling factors from the format description.

Since the configured size only has pixel precision, the fractional
fixed-point part of the source size is dropped for both components to
ensure that the scaling factors are accurate.

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181123092515.2511-26-paul.kocialkowski@bootlin.com
2018-11-27 09:58:22 +01:00
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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.
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