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Although user manuals for H3 and H5 SoCs state that minimal rate supported by video PLL is around 30 MHz, it seems that in reality minimal rate is around 192 MHz. Experiments showed that any rate below 96 MHz doesn't produce any video output at all. Even at this frequency, stable output depends on right factors. For example, when N = 4 and M = 1, output is stable and when N = 8 and M = 2, it's not. BSP clock driver suggest that minimum stable frequency is 192 MHz. That would also be in line with A64 SoC, which has similar periphery. Set minimal video PLL rate for H3/H5 to 192 MHz. Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net> Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.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.