drm/i915/dp: do not write DP_TRAINING_PATTERN_SET all the time
authorJani Nikula <jani.nikula@intel.com>
Fri, 27 Sep 2013 12:10:44 +0000 (15:10 +0300)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Tue, 1 Oct 2013 05:45:47 +0000 (07:45 +0200)
commit70aff66c953054334bf0569696901c13e206ade6
tree26d9196727d91301e14b0f83ac08bdcd8226572b
parent58c67ce9f0a0d9f016cded91b652642e2aca9e07
drm/i915/dp: do not write DP_TRAINING_PATTERN_SET all the time

Neither the DP spec nor the compliance test spec state or imply that we
should write the DP_TRAINING_PATTERN_SET at every voltage swing and
pre-emphasis change. Indeed we probably shouldn't. So don't.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=49402
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Smoke-tested-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
drivers/gpu/drm/i915/intel_dp.c