RFC: Displayport Link Policy Maker Update

This patch set lays the initial groundwork for updating the Displayport link policy maker in the i915 driver. These first 5 patches add modular functions that have been split out from the larger, monolithic ones present in the driver. The purpose of this work is the following:
1) Improve reliability and operation of the Displayport link policy maker
2) Modularize and compartmentalize functionality to enhance readability and reliability
3) Allow more fine-grain control over the operation of the link policy maker
4) Enable features of Displayport such as Multistream Transport and compliance testing

Note that these new functions are not yet integrated into the operational code path(s). The original functions have been left in place, as is, to maintain operational status. Follow on patch sets will integrate these functions into the policy maker.

Todd Previte (5):
dmr/i915: Displayport - Add a function to set the training pattern drm/i915: Displayport - Add function to check link status drm/i915: Displayport - Add function to enable/disable scrambling on
the main link
drm/i915: Displayport - Add function for executing a single iteration
of clock recovery
drm/i915: Displayport - Add function to execute a single iteration of
channel equalization

 drivers/gpu/drm/i915/i915_reg.h |   8 ++
 drivers/gpu/drm/i915/intel_dp.c | 217 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 225 insertions(+)

1.8.3.2