580f1f41bf
S905W SoC is another SoC from the GXL family. It is a cost-reduced version of the S905X SoC. The following differences are known: - S905W supports HDMI resolutions up to 4k@30fps (while S905X support resolutions up to 4k@60fps) - the built-in video decoders of S905W decode up to 4k@30fps (while S905X supports decoding up to 4k@60fps) - CPU speed on S905W is limited to 1.2GHz (compared to 1.5GHz on S905X, this is handled in the SCPI firmware) - the DRAM interface on S905W is limited to 16-bit (GXL supports both, 16-bit and 32-bit) Notes based on Amlogic's GPL kernel sources: - the P281 is a development board from Amlogic which uses the S905W SoC. Amlogic's GPL kernel sources indicate that it uses the same PCB layout as the "P231" board (and simply replaces the S905D from the original P231 board with a S905W SoC). - it is assumed that the S905W SoC is pin-compatible with the S905X SoC since Amlogic's GPL kernel sources use the same driver for both SoCs. - gxl_p281_1g.dts contains a comment which mentions that "max gp pll for gpu is 650M, temporarily disabled". However, it seems to boot fine with 744MHz (as used on GXBB and the other GXL SoCs). Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Reviewed-by: Rob Herring <robh@kernel.org> Reviewed-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Kevin Hilman <khilman@baylibre.com> |
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| firmware | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
README
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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.