[Intel-gfx] [PATCH v4 0/9] DC3CO Support for TGL

[Anshuman Gupta]

This revision is a rebased and has addressed few review comment
provided by Animesh and has some other fixes in dc3 disallow sequence.

one patch of this series "tgl-DC3CO-PSR2-helper"
will require rebase after https://patchwork.freedesktop.org/series/62416/
series will merged to drm-tip.
TGL supports DC3CO only on PipeA in LPSP mpde, so DC3CO doesn't depends
on TGL PSR "Transcoder B" feature.

B.Specs:49196
DC3CO requirements:
*Audio codec idle and disabled.
*External displays disabled.
 WD transcoders and DP/HDMI transcoders must be disabled.
*Backlight cannot be driven from the display utility pin.
 It can be driven from the south display.
*This feature should be enabled only in Display Video playback on eDP.
*DC5 and DC6 not allowed when this feature is enabled.
*PSR2 deep sleep disabled (PSR2_CTL Idle Frames = 0000b)
*Disable DC3co before mode set, or other Aux, PLL, and DBUF programming,
 and do not re-enable until after that programming is completed.
*DC3co must not be enabled until after PSR2 is enabled.
*DC3co must be disabled before PSR2 is disabled.

Anshuman Gupta (9):
  drm/i915/tgl: Add DC3CO required register and bits
  drm/i915/tgl: Add DC3CO mask to allowed_dc_mask and gen9_dc_mask
  drm/i915/tgl: Add power well to enable DC3CO state
  drm/i915/tgl: mutual exclusive handling for DC3CO and DC5/6
  drm/i915/tgl: Add helper function to prefer dc3co over dc5
  drm/i915/tgl: Add VIDEO power domain
  drm/i915/tgl: DC3CO PSR2 helper
  drm/i915/tgl: switch between dc3co and dc5 based on display idleness
  drm/i915/tgl: Add DC3CO counter in i915_dmc_info

 drivers/gpu/drm/i915/display/intel_display.c  |   9 +
 .../drm/i915/display/intel_display_power.c    | 290 +++++++++++++++++-
 .../drm/i915/display/intel_display_power.h    |  11 +
 drivers/gpu/drm/i915/display/intel_psr.c      |  44 +++
 drivers/gpu/drm/i915/display/intel_psr.h      |   2 +
 drivers/gpu/drm/i915/i915_debugfs.c           |   6 +
 drivers/gpu/drm/i915/i915_drv.h               |   8 +
 drivers/gpu/drm/i915/i915_params.c            |   3 +-
 drivers/gpu/drm/i915/i915_reg.h               |  10 +
 drivers/gpu/drm/i915/intel_pm.c               |   2 +-
 drivers/gpu/drm/i915/intel_pm.h               |   2 +
 11 files changed, 376 insertions(+), 11 deletions(-)

-- 
2.21.0