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LSPCON likes to throw short HPDs during the enable seqeunce prior to the link being trained. These obviously result in the channel CR/EQ check failing and thus we schedule a pointless hotplug work to retrain the link. Avoid that by ignoring the bad CR/EQ status until we've actually initially trained the link. I've not actually investigated to see what LSPCON is trying to signal with the short pulse. But as long as it signals anything I think we're supposed to check the link status anyway, so I don't really see other good ways to solve this. I've not seen these short pulses being generated by normal DP sinks. Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Lyude Paul <lyude@redhat.com> Signed-off-by: Lyude Paul <lyude@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180117192149.17760-5-ville.syrjala@linux.intel.com
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.