powerhint: Support early wake up DPU via DISPLAY_UPDATE_IMMINENT

This hint is set to indicate that the framework is likely to provide
a new frame soon. Therefore HWC has additional time to exit power
collapse. Set display_update_imminent_timeout_ms align to DPU
hibernation timeout.

Bug: 164411401
Test: systrace, testLayoutCacheLowHitrateFling
Change-Id: Idac388ac8700ed92e9620445a5038af54683df53

device.mk

@@ -597,6 +597,8 @@ PRODUCT_DEFAULT_PROPERTY_OVERRIDES += ro.surface_flinger.has_wide_color_display=
 PRODUCT_DEFAULT_PROPERTY_OVERRIDES += ro.surface_flinger.has_HDR_display=true
 PRODUCT_DEFAULT_PROPERTY_OVERRIDES += ro.surface_flinger.use_color_management=true
 PRODUCT_DEFAULT_PROPERTY_OVERRIDES += ro.surface_flinger.protected_contents=true
+PRODUCT_DEFAULT_PROPERTY_OVERRIDES += ro.surface_flinger.display_update_imminent_timeout_ms=50
+
 # force to blend in P3 mode
 PRODUCT_PROPERTY_OVERRIDES += \
 	persist.sys.sf.native_mode=2 \

powerhint.json

@@ -142,6 +142,14 @@
       ],
       "ResetOnInit": true
     },
+    {
+      "Name": "DisplayWakeup",
+      "Path": "/sys/devices/platform/1c300000.drmdecon/early_wakeup",
+      "Values": [
+        "1",
+        "0"
+      ]
+    },
     {
       "Name": "LimitFlashCurrent",
       "Path": "vendor.camera.max_flash_current",
@@ -499,6 +507,12 @@
       "Type": "EndHint",
       "Value": "DISABLE_TA_BOOST"
     },
+    {
+      "PowerHint": "DISPLAY_UPDATE_IMMINENT",
+      "Node": "DisplayWakeup",
+      "Duration": 50,
+      "Value": "1"
+    },
     {
       "PowerHint": "THERMAL_FLASH_LED_REDUCE_CRITICAL",
       "Node": "LimitFlashCurrent",