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323278e305
As the cpu frequency is less than 816MHz, the HDMI display maybe probably cause a flower screen as below log[0]. And Kylin used the rk3036g series SoCs that the max cpu frequency supported the 1GHz, not 1.2GHz. In a word, keep the cpu frequency to 1GHz for kylin board. log[0]: [26.498843] rk_iommu 10118300.iommu: Enable stall request timed out, status: 0x000011 [26.528809] rk_iommu 10118300.iommu: Disable paging request timed out, status: 0x000011 [26.598849] rk_iommu 10118300.iommu: Enable stall request timed out, status: 0x000011 [26.607579] rockchip-vop 10118000.vop: Failed to attach iommu device [26.614916] rockchip-vop 10118000.vop: failed to attach dma mapping, -110 .. Change-Id: I8e1d4527b649d8857a9d80a121c10935a4cd1030 Signed-off-by: Caesar Wang <wxt@rock-chips.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.