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The DU CRTC driver does not support distinguishing between a hardware index, and a software (CRTC) index in the event that a DU channel might not be populated by the hardware. Support this by adapting the rcar_du_device_info structure to store a bitmask of available channels rather than a count of CRTCs. The count can then be obtained by determining the hamming weight of the bitmask. This allows the rcar_du_crtc_create() function to distinguish between both index types, and non-populated DU channels will be skipped without leaving a gap in the software CRTC indexes. Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.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.
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.