commit 2173dc37da793599239a974d8f7bc40b2bf1ee80
author Badhri Jagan Sridharan <badhri@google.com> Wed Apr 05 20:40:30 2023 +0000
committer Badhri Jagan Sridharan <badhri@google.com> Sat Apr 08 01:01:12 2023 +0000
tree 6a35a2db791fe5c72a1e13d0a4e31a4dccbb09ea
parent dfcf0891ec0e5322284e86922c616bb98403782e

usb: Expose persistent vendor property for USB-C Dp Alt Mode

The change exposes persist.vendor.usb.displayport.enabled
to enable/disable USB-C Dp Alt Mode i.e. DisplayPort over USB-C.

By default persist.vendor.usb.displayport.enabled is to 0 in
user builds and 1 in all other build variants.

Bug: 277107943
Change-Id: I596d3af52f2a813f5f78c4f9b77b6ae3dd8a161b
Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>

conf/init.zuma.usb.rc

diff --git a/conf/init.zuma.usb.rc b/conf/init.zuma.usb.rc
index 0f5d22c..7b4ef19 100644
--- a/conf/init.zuma.usb.rc
+++ b/conf/init.zuma.usb.rc
@@ -192,3 +192,9 @@
 
 on property:ro.bootmode=usbuwb
     setprop persist.vendor.usb.usbradio.config uwb_acm
+
+on property:persist.vendor.usb.displayport.enabled=1
+    write /sys/class/typec/port0/port0.0/mode1/active "yes"
+
+on property:persist.vendor.usb.displayport.enabled=0
+    write /sys/class/typec/port0/port0.0/mode1/active "no"

device.mk

diff --git a/device.mk b/device.mk
index 8dfe5c4..be01d7d 100644
--- a/device.mk
+++ b/device.mk
@@ -196,6 +196,14 @@
 PRODUCT_PROPERTY_OVERRIDES += \
 	telephony.active_modems.max_count=2
 
+ifneq (,$(filter userdebug eng, $(TARGET_BUILD_VARIANT)))
+PRODUCT_PROPERTY_OVERRIDES += \
+	persist.vendor.usb.displayport.enabled=1
+else
+PRODUCT_PROPERTY_OVERRIDES += \
+	persist.vendor.usb.displayport.enabled=0
+endif
+
 USE_LASSEN_OEMHOOK := true
 
 # Use for GRIL