[Intel-gfx] [PATCH 0/6] reduce register save/restoring accross suspend/resume

[Daniel Vetter]

Hi all,

This is a start at stopping to use the register save/restore stuff with kms
enabled. Imo we've had too many bugs in the resume code because no one seems to
care about this code and check whether it still makes sense for new platforms.
Or to check whether a bugfix to a reg write sequence also needs to be applied
there. Or whether restoring some random register is a good idea at all.

So I've started to audit all the register write/restores and check whether our
normal setup code could possible rely on this. If I haven't found anything, I've
braketed the respective block with a if (!KMS) check.

I probably need a few more days of utter boredom to work through it all.

Comments, flames and review highly welcome.

Cheers, Daniel

Daniel Vetter (6):
  drm/i915/crt: don't set HOTPLUG bits on !PCH
  drm/i915/crt: explicitly set up HOTPLUG_BITS on resume
  drm/i915: don't save/restor ADPA for kms
  drm/i915: don't save/restore DP regs for kms
  drm/i915: don't save/restore irq regs for kms
  drm/i915: don't save/restore HWS_PGA reg for kms

 drivers/gpu/drm/i915/i915_drv.c      |   1 -
 drivers/gpu/drm/i915/i915_suspend.c  | 154 +++++++++++++++++++----------------
 drivers/gpu/drm/i915/intel_crt.c     |  32 ++++----
 drivers/gpu/drm/i915/intel_display.c |   2 +
 4 files changed, 103 insertions(+), 86 deletions(-)

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1.7.11.2