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a697f072f5
There are systems (for example, Intel based mobile platforms since Coffee Lake) where the power drawn while suspended can be significantly reduced by disabling Precision Time Measurement (PTM) on PCIe root ports as this allows the port to enter a lower-power PM state and the SoC to reach a lower-power idle state. To save this power, disable the PTM feature on root ports during pci_prepare_to_sleep() and pci_finish_runtime_suspend(). The feature will be returned to its previous state during restore and error recovery. Suggested-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=209361 Link: https://lore.kernel.org/r/20201207223951.19667-2-david.e.box@linux.intel.com Reported-by: Len Brown <len.brown@intel.com> Signed-off-by: David E. Box <david.e.box@linux.intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> |
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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.