drm/i915/display: Add DC3CO compute and set target state in commit tail

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Compute if dc3co is allowed in intel_atomic_commit_tail()
based on pipe/port constraints and runtime triggers and store
result in display->power.dc3co.

When DC3CO can be enabled, request DC_STATE_EN_UPTO_DC3CO and
reduce the DC entry delay. Otherwise, retain the existing
delay and set default DC_STATE_EN_UPTO_DC6.

Changes in v2:
- Move DC3CO compute logic from intel_atomic_check()
  to intel_atomic_commit_tail as it is not advisable to
  change persistent state in atomic check (Jani Nikula)
- Add psr2 deep sleep check in dc3co compute.
- Move allowed computation logic inside dc3co update (Jani Nikula).
- Add dc3co support check in dc3co allowed function (Jani Nikula)
- Move all dc3co functions to intel_display_power.c and
  rename functions accordingly  (Jani Nikula)
- Clean up dc3co/dc6 power async delay in
  intel_atomic_commit_tail() (Jani Nikula)

Changes in v3:
- Remove debug print from intel_display_power_dc3co_update()

BSpec: 75253
Signed-off-by: Dibin Moolakadan Subrahmanian <dibin.moolakadan.subrahmanian@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Reviewed-by: Animesh Manna <animesh.manna@intel.com>
Signed-off-by: Animesh Manna <animesh.manna@intel.com>
Link: https://patch.msgid.link/20260616162154.2630995-9-dibin.moolakadan.subrahmanian@intel.com

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This commit is contained in:

Dibin Moolakadan Subrahmanian 2026-06-16 21:51:46 +05:30 • committed by Animesh Manna

parent 7741043a45

commit d75ea53314

4 changed files with 181 additions and 5 deletions

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14

drivers/gpu/drm/i915/display/intel_display.c

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2

drivers/gpu/drm/i915/display/intel_display_core.h

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133

drivers/gpu/drm/i915/display/intel_display_power.c

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37

drivers/gpu/drm/i915/display/intel_display_power.h

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