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On CHV toggling the CGM CSC on/off while the pipe is running leads to underruns. Looks like we'd have to do the toggling strictly inside the start_of_vblank-frame_start window to avoid this, but that window is less than a scanline so there's no way we can guarantee hitting it. As a workaround let's just leave the CGM CSC permanently enabled. Fortunately the CGM gamma/degamma units don't seem to suffer from this malady. I also tried turning off CGM unit clock gating, but that did not help. Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20230413164916.4221-5-ville.syrjala@linux.intel.com Reviewed-by: Uma Shankar <uma.shankar@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.