This will hopefully make it easier to navigate the code without the need
to consult the full PM documentation.

Signed-off-by: Imre Deak <imre.d...@intel.com>
---
 drivers/gpu/drm/i915/i915_drv.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 55b04e6..44c9317 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -1506,10 +1506,21 @@ static int intel_resume_prepare(struct drm_i915_private 
*dev_priv,
 }
 
 static const struct dev_pm_ops i915_pm_ops = {
+       /* S0ix, S3 event handlers */
        .suspend = i915_pm_suspend,
        .suspend_late = i915_pm_suspend_late,
        .resume_early = i915_pm_resume_early,
        .resume = i915_pm_resume,
+
+       /*
+        * S4 event handlers
+        * @freeze, @freeze_late    : called before creating hibernation image
+        * @thaw, @thaw_early       : called after creating hibernation image,
+        *                            before writing it
+        * @poweroff, @poweroff_late: called after writing hibernation image,
+        *                            before rebooting
+        * @restore, @restore_early : called after rebooting
+        */
        .freeze = i915_pm_suspend,
        .freeze_late = i915_pm_suspend_late,
        .thaw_early = i915_pm_resume_early,
@@ -1518,6 +1529,8 @@ static const struct dev_pm_ops i915_pm_ops = {
        .poweroff_late = i915_pm_suspend_late,
        .restore_early = i915_pm_resume_early,
        .restore = i915_pm_resume,
+
+       /* D0<->D3 (runtime PM) event handlers */
        .runtime_suspend = intel_runtime_suspend,
        .runtime_resume = intel_runtime_resume,
 };
-- 
1.8.4

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