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On MTL (and only on MTL) the GSCCS defaults with idle messaging disabled. This means that, once awoken, the GSCCS will never signal its idleness to the GT. To allow the GT to enter the proper low-power state, we need therefore to turn idle messaging on. As part of this, we also need to set a proper hysteresis value for the engine. v2: use MEDIA_VERSION() and CLR() for the RTP rule and action, add reg bit define in descending order (Matt) Bspec: 71496 Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Cc: Vinay Belgaumkar <vinay.belgaumkar@intel.com> Cc: Matt Roper <matthew.d.roper@intel.com> Reviewed-by: Matt Roper <matthew.d.roper@intel.com> Link: https://lore.kernel.org/r/20230817221707.1602873-1-daniele.ceraolospurio@intel.com Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.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.