usb: enable media-presence polling for SD cards
After USB enumeration, some SD card readers do not send signals to the
device when the SD card is inserted or removed.
To support SD card hotplugging, this patch enables in-kernel
media-presence polling, which will check the SD card status every 2
seconds after a SD card reader is attached.
Bug: 186479576
Test: SD card insertion/removal and data copy (see b/301566595)
Change-Id: I044aeffd9386c0bee6138402e5130c39e1adbc9f
Signed-off-by: Kuen-Han Tsai <khtsai@google.com>
diff --git a/conf/init.zuma.usb.rc b/conf/init.zuma.usb.rc
index 4dff012..2cbb30b 100644
--- a/conf/init.zuma.usb.rc
+++ b/conf/init.zuma.usb.rc
@@ -370,6 +370,8 @@
write sys/module/usbcore/parameters/initial_descriptor_timeout 500
# Use USB Gadget HAL
setprop sys.usb.configfs 2
+ # Enable in-kernel media-presence polling for SD cards
+ write /sys/module/block/parameters/events_dfl_poll_msecs 2000
on property:sys.usb.ffs.ready=1 && property:sys.usb.config=adb && property:sys.usb.configfs=1
write /config/usb_gadget/g1/idProduct 0x4EE7
