[ Upstream commit eaf80126aba6fd1754837eec91e4c8bbd58ae52e ] CMDQ is used to update display register in vblank period, so it should be execute in next 2 vblank. One vblank interrupt before send message (occasionally) and one vblank interrupt after cmdq done. If it fail to execute in next 3 vblank, tiemout happen. Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org> Signed-off-by: jason-jh.lin <jason-jh.lin@mediatek.com> Signed-off-by: Sasha Levin <sashal@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. 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.
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