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When bandwidth limits are looked up using pcie_bandwidth_available() virtual links such as USB4 are analyzed which might not represent the real speed. Furthermore devices may change speeds autonomously which may introduce conditional variation to the results reported in the status registers. Instead look at the capabilities of first PCI device outside of dGPU to decide upper limits that the dGPU will work at. For eGPU this effectively means that it will use the speed of the link partner. Link: https://gitlab.freedesktop.org/drm/amd/-/issues/2925#note_2145860 Link: https://www.usb.org/document-library/usb4r-specification-v20 USB4 V2 with Errata and ECN through June 2023 Section 11.2.1 Reviewed-by: Lijo Lazar <lijo.lazar@amd.com> Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> |
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| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
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| COPYING | ||
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| README | ||
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.