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Some devices with a builtin panel have the panel mounted upside down, this is indicated by the rotate_180 bit in the BDB_GENERAL_FEATURES VBT block. We store this info in dev_priv->vbt.orientation, use this to set the connector's orientation property so that fbcon and userspace will show the image the right way up on devices with an upside-down mounted panel. This fixes the image being upside-down on a Teclast X89 tablet. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200228114110.187792-3-hdegoede@redhat.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.