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The VSPDL variant drives two DU channels through two LIF and two blenders, BRU and BRS. The DU channels thus share the five available VSPDL inputs and expose them as five KMS planes. The current implementation assigns the BRS to the second LIF and thus artificially limits the number of planes for the second display channel to two at most. Lift this artificial limitation by assigning the BRU and BRS to the display pipelines on demand based on the number of planes used by each pipeline. When a display pipeline needs more than two inputs and the BRU is already in use by the other pipeline, this requires reconfiguring the other pipeline to free the BRU before processing, which can result in frame drop on both pipelines. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
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.