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With Allwinner's Display Engine 1.0, each TCON's input is tied to a specific display backend, and the 2 comprise what is known as a crtc in DRM KMS land: The layer, framebuffer, and compositing functions are provided by the backend, while the TCON provides the display timing signals and vblank interrupts. This 1 to 1 relationship is represented in the device tree. On some systems there is an intermediate DRC component. Pointers to both matching components must be provided when initializing the crtc. As the backend is always registered before the associated tcon, we can recursively search upwards through the of_graph to find the matching backend. Signed-off-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> |
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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.