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56c12ec72a
WA_14020863754: Corner case with Min Hblank Fix can cause audio hang Issue: Previously a fix was made to avoid issues with extremely small hblanks, called the "Min Hblank Fix". However, this can potentially cause an audio hang. Workaround : During "Audio Programming Sequence" Audio Enabling - When DP mode is enabled Set mmio offset 0x65F1C bit 18 = 1b, before step #1 "Enable audio Presence Detect" During "Audio Programming Sequence" Audio Disabling - When DP mode is enabled Clear mmio offset 0x65F1C bit 18 = 0b, after step #6 "Disable Audio PD (Presence Detect)" If not clearing PD bit, must also not clear 0x65F1C bit 18 (leave = 1b) v2: Update the platform checks (Jani Nikula) v3: Limited the WA to LNL and BMG, added a helper (Matt Roper) v4: Updated the bit naming, fixed redundant if statement Signed-off-by: Uma Shankar <uma.shankar@intel.com> Reviewed-by: Chaitanya Kumar Borah <chaitanya.kumar.borah@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20240509053508.2807834-1-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 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.