Wenjing Liu
c371b0d12d
drm/amd/display: do not calculate DP2.0 SST payload when link is off
[Why & How] There is a chance where the RX issues HPD deassert in the middle of link training, this will cause our logic to abort link training and turn off link. However our payload allocation logic needs to use current link settings to determine average time slot per MTP. This will need to use current link bandwidth as divider. This causes divide by zero error occasionally. The fix is to skip DP2.0 payload allocation logic if current link is not in 128b/132b mode. Reviewed-by: George Shen <George.Shen@amd.com> Acked-by: Stylon Wang <stylon.wang@amd.com> Signed-off-by: Wenjing Liu <wenjing.liu@amd.com> Tested-by: Daniel Wheeler <daniel.wheeler@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.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. 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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