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Currently a specific panel number is used in the Elm DTSI, which is corresponded to a 12" panel. However, according to the official Chrome OS devices document, Elm refers to Acer Chromebook R13, which, as the name specifies, uses a 13.3" panel, which comes with EDID information. As the kernel currently prioritizes the hardcoded timing parameters matched with the panel number compatible, a wrong timing will be applied to the 13.3" panel on Acer Chromebook R13, which leads to blank display. Because the Elm DTSI is shared with Hana board, and Hana corresponds to multiple devices from 11" to 14", a certain panel model number shouldn't be present, and driving the panel according to its EDID information is necessary. Signed-off-by: Icenowy Zheng <uwu@icenowy.me> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Reviewed-by: Douglas Anderson <dianders@chromium.org> Link: https://lore.kernel.org/r/20230526100801.16310-1-uwu@icenowy.me Signed-off-by: Matthias Brugger <matthias.bgg@gmail.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.