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There are a few hardware bits for each graphic layer to control main/aux channel and clock selection, as well as the layer enabling. These bits sit outside the layer block itself, but in VOU control glue block. We currently set these bits up at CRTC initialization for once, and do not support disabling the layer. This patch creates a pair of functions zx_vou_layer_enable[disable] to be invoked from plane hooks .atomic_update and .atomic_disable to set up and tear down the layer. This is generic for both graphic and video layers, so it will make the overlay plane support to be added later much easier. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Reviewed-by: Sean Paul <seanpaul@chromium.org> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. 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.