drm/i915: DP link training optimization
authorMika Kahola <mika.kahola@intel.com>
Wed, 29 Apr 2015 06:17:40 +0000 (09:17 +0300)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Fri, 8 May 2015 11:03:27 +0000 (13:03 +0200)
commit5fa836a9d85975c5f0f1219669523c1f0ac64349
tree50af3ab42fecfc9498cfa83cfad544b0a598d3a8
parent4e96c97742f4201edf1b0f8e1b1b6b2ac6ff33e7
drm/i915: DP link training optimization

This patch adds DP link training optimization by reusing the
previously trained values.

v2:
- rebase

V3:
- rebase

V4:
- when HPD long pulse is received, the flag is cleared
  that indicates if DP link training is required or not
  (based on Sivakumar's comment)

Signed-off-by: Mika Kahola <mika.kahola@intel.com>
Reviewed-by: Sivakumar Thulasimani <sivakumar.thulasimani@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
drivers/gpu/drm/i915/intel_dp.c