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01c2be8e1b
Read out the pipe/output csc matrices on ilk+ and stash the results (in the hardware specific format) into the appropriate place in the crtc state. Note that on skl/glk/icl the pipe csc unit suffers from an issue where *reads* of the coefficient/offset registers also disarm the double buffer update (if currently armed via CSC_MODE write). So it's rather important that the readout only happens after the csc registers have been latched. Fortunately the state checker only runs after the start of vblank where the latching happens. And on skl/glk the DMC + CSC register read has the potential to corrupt the latched CSC register values, so let's add a comment reminding us that the DC states should remain off until the readout has been completed. TODO: maybe we could somehow check to make sure PSR has in fact latched the new register values already, and that DC states have been off all along? Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20230329135002.3096-9-ville.syrjala@linux.intel.com Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@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.