[Intel-gfx] [PATCH 0/3] PSR link standby x link force off changes.

[Rodrigo Vivi]

Durring last attempt to enable PSR we found one Skylake that required
link standby mode and on Skylake we don't have the link standby
issues we faced on HSW and BDW. So let's put link standby support back
and instrument i915.enable_psr to force link standby and link force off
for debug purposes.

More details about the changes are on individual commits.

I intend to send PSR enable by default soon as soon our QA gives the ok
it is working well, besides my own local tests here.

Thanks,
Rodrigo.

Rodrigo Vivi (3):
  drm/i915: PSR simplify port and link standby checks.
  drm/i915: Add PSR main link standby support back
  drm/i915: Instrument PSR parameter for debuging with link standby x
    link off.

 drivers/gpu/drm/i915/i915_debugfs.c |  4 +++
 drivers/gpu/drm/i915/i915_drv.h     |  1 +
 drivers/gpu/drm/i915/i915_params.c  |  3 ++-
 drivers/gpu/drm/i915/intel_psr.c    | 54 ++++++++++++++++++++++++++++++-------
 4 files changed, 52 insertions(+), 10 deletions(-)

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2.4.3