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a9422ec92a
DSB_STATUS bit 16 is supposed to be a sticky bit informing us whether the DSB was idle or not when the pipe's delayed vblank (when double buffered registers latch) occurred. Unfortunately it turns out this is a level triggred signal, ie. the bit will be set whenever the DSB is busy during the scanline window between start of delayed vblank and vtotal. Try to document that fact by renaming the bit. Sadly this also thwarts my plan to use this bit to sanity check that the (to be introduced) DSB based vblank evasion did its job correctly. That would require an edge triggered signal instead. So looks like we'll have to rely mostly on luck instead :( Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20240611133344.30673-12-ville.syrjala@linux.intel.com Reviewed-by: Jani Nikula <jani.nikula@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 reStructuredText 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.