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RK3528/RK3562/RK3576 use the VOP3 architecture, which supports flexible switching of planes between different VP. User can switch planes between different CRTCs based on the &drm_plane.possible_crtcs in userspace, and the plane-mask does not need to be assigned by default in DTS. However, for some Linux systems, there may still be scenarios where it is necessary to specify the primary and cursor planes specifically used on a VP. Therefore, the valid plane-mask assignment will change the &drm_plane.possible_crtcs and establish a fixed binding relationship between planes and CRTCs, which means that the flexible switching of planes is not available in the case. Change-Id: I156f71ceb238c5945a92f48c0024f398711ea811 Signed-off-by: Damon Ding <damon.ding@rock-chips.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.