Pull intel drm fixes from Daniel Vetter:
 "So I heard that proper pull requests have a revert on top ;-) So here
  we go with my usual mid-merge-window pile of fixes.

[ Ed. This revert thing had better not become the "in" thing ]

   Big fix is the duct-tape for ring init on g4x platforms, we seem to
  have found the magic again to make those machines as happy as before
  (not perfect though unfortunately, but that was never the case).

  Otherwise fixes all over:
   - tune down some overzealous debug output
   - VDD power sequencing fix after resume
   - bunch of dsi fixes for baytrail among them hw state checker
     de-noising
   - bunch of error state capture fixes for bdw
   - misc tiny fixes/workarounds for various platforms

  Last minute rebase was to kick out two patches that shouldn't have
  been in here - they're for the state checker, so 0 functional code
  affected.

  Jani's back from vacation, so he'll take over -fixes from here"

* tag 'drm-intel-fixes-2014-08-08' of git://anongit.freedesktop.org/drm-intel: (21 commits)
  Revert "drm/i915: Enable semaphores on BDW"
  drm/i915: read HEAD register back in init_ring_common() to enforce ordering
  drm/i915: Fix crash when failing to parse MIPI VBT
  drm/i915: Bring GPU Freq to min while suspending.
  drm/i915: Fix DEIER and GTIER collecting for BDW.
  drm/i915: Don't accumulate hangcheck score on forward progress
  drm/i915: Add the WaCsStallBeforeStateCacheInvalidate:bdw workaround.
  drm/i915: Refactor Broadwell PIPE_CONTROL emission into a helper.
  drm/i915: Fix threshold for choosing 32 vs. 64 precisions for VLV DDL values
  drm/i915: Fix drain latency precision multipler for VLV
  drm/i915: Collect gtier properly on HSW.
  drm/i915: Tune down MCH_SSKPD values warning
  drm/i915: Tune done rc6 enabling output
  drm/i915: Don't require dev->struct_mutex in psr_match_conditions
  drm/i915: Fix error state collecting
  drm/i915: fix VDD state tracking after system resume
  drm/i915: Add correct hw/sw config check for DSI encoder
  drm/i915: factor out intel_edp_panel_vdd_sanitize
  drm/i915: wait for all DSI FIFOs to be empty
  drm/i915: work around warning in i915_gem_gtt
  ...