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drm/i915: add comments on what stage a given PM handler is called
This will hopefully make it easier to navigate the code without the need to consult the full PM documentation. v2: - add a comment that the freeze handler is also called after rebooting - add a comment that the thaw handler is also called to recover from errors (Ville) - add the PM event names (PMSG_THAW etc.) for reference (Ville) - add comments that s0ix can be handled both via system and runtime suspend (Ville) Signed-off-by: Imre Deak <imre.deak@intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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@ -1534,10 +1534,30 @@ static int intel_resume_prepare(struct drm_i915_private *dev_priv,
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}
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static const struct dev_pm_ops i915_pm_ops = {
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/*
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* S0ix (via system suspend) and S3 event handlers [PMSG_SUSPEND,
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* PMSG_RESUME]
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*/
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.suspend = i915_pm_suspend,
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.suspend_late = i915_pm_suspend_late,
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.resume_early = i915_pm_resume_early,
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.resume = i915_pm_resume,
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/*
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* S4 event handlers
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* @freeze, @freeze_late : called (1) before creating the
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* hibernation image [PMSG_FREEZE] and
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* (2) after rebooting, before restoring
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* the image [PMSG_QUIESCE]
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* @thaw, @thaw_early : called (1) after creating the hibernation
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* image, before writing it [PMSG_THAW]
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* and (2) after failing to create or
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* restore the image [PMSG_RECOVER]
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* @poweroff, @poweroff_late: called after writing the hibernation
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* image, before rebooting [PMSG_HIBERNATE]
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* @restore, @restore_early : called after rebooting and restoring the
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* hibernation image [PMSG_RESTORE]
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*/
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.freeze = i915_pm_suspend,
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.freeze_late = i915_pm_suspend_late,
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.thaw_early = i915_pm_resume_early,
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@ -1546,6 +1566,8 @@ static const struct dev_pm_ops i915_pm_ops = {
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.poweroff_late = i915_pm_suspend_late,
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.restore_early = i915_pm_resume_early,
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.restore = i915_pm_resume,
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/* S0ix (via runtime suspend) event handlers */
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.runtime_suspend = intel_runtime_suspend,
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.runtime_resume = intel_runtime_resume,
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};
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