[PATCH 0/4 V5] Power-well API implementation for Haswell

[Wang Xingchao <xingchao.wang@linux.intel.com>]

Hi all,

   This is V5 and here're some changes notes:

   change from V4-->V5:
   - fix reference count bug
   - new patch on general runtime pm support for audio pci device
   - new patch to avoid request_module() deadlock

   change between V3-->V4:
   - add new structure i915_power_well
   - initialize drm_device pointer at module init time
   - change function name

   change between V2-->V3:
   - make SND_HDA_I915 selectable
   - use snd_printdd to output message
   - add return error code check
   - use symbol_request to replace symbol_get
   - release power_well at azx_free
   - some typo fixes

   changes between V1-->V2:
   - use reference count to track power-well usage
   - remove external module, compiled into snd-hda-intel instead
   - manage symbols and module loading properly
   - remove IS_HSW macro, use flag instead
   - remove audio callback for gfx driver to avoid dependency 
   - split whole patch into two pieces for easy review
   - more typo fixes

Wang Xingchao (4):
  i915/drm: Add private api for power well usage
  ALSA: hda - Add power-welll support for haswell HDA
  ALSA: hda - Fix runtime PM check
  ALSA: hda - Continue probe in work context to avoid request_module
    deadlock

 drivers/gpu/drm/i915/i915_dma.c  |   6 ++
 drivers/gpu/drm/i915/i915_drv.h  |  12 ++++
 drivers/gpu/drm/i915/intel_drv.h |   4 ++
 drivers/gpu/drm/i915/intel_pm.c  |  92 ++++++++++++++++++++++++---
 include/drm/i915_powerwell.h     |  36 +++++++++++
 sound/pci/hda/Kconfig            |  10 +++
 sound/pci/hda/Makefile           |   3 +
 sound/pci/hda/hda_i915.c         |  75 ++++++++++++++++++++++
 sound/pci/hda/hda_i915.h         |  35 +++++++++++
 sound/pci/hda/hda_intel.c        | 132 ++++++++++++++++++++++++++++-----------
 10 files changed, 360 insertions(+), 45 deletions(-)
 create mode 100644 include/drm/i915_powerwell.h
 create mode 100644 sound/pci/hda/hda_i915.c
 create mode 100644 sound/pci/hda/hda_i915.h

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1.8.1.2