]> git.baikalelectronics.ru Git - kernel.git/commit
projects / kernel.git / commit
? search:
summary | shortlog | log | commit | commitdiff | tree
(parent: d6bbef5) | patch
drm/i915: Document BDW+ DRRS M/N programming requirements
authorVille Syrjälä <ville.syrjala@linux.intel.com>
Fri, 28 Jan 2022 10:37:57 +0000 (12:37 +0200)
committerVille Syrjälä <ville.syrjala@linux.intel.com>
Tue, 1 Feb 2022 09:33:23 +0000 (11:33 +0200)
commitcdf3139621074b986f55ec79a8ff76b02423d606
treedd8d6c9368620ea6297f5bd0de19ffb293edc6e3tree | snapshot
parentd6bbef5b87168fd68c66cfde8eb1debe544279a4commit | diff
drm/i915: Document BDW+ DRRS M/N programming requirements

When reprogramming M/N live on BDW+ we must write the LINK_N
register last as it's the one that arms the double buffered
register update for all the M/N registers. Document this so
that we don't accidentally break things.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220128103757.22461-18-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
drivers/gpu/drm/i915/display/intel_display.c diff | blob | history
Linux Kernel Source Tree.