HID: i2c-hid: Disable runtime PM on Synaptics touchpad
authorHui Wang <hui.wang@canonical.com>
Fri, 29 Mar 2019 06:13:23 +0000 (14:13 +0800)
committerJiri Kosina <jkosina@suse.cz>
Mon, 1 Apr 2019 13:57:38 +0000 (15:57 +0200)
We have a new Dell laptop which has the synaptics I2C touchpad
(06cb:7e7e) on it. After booting up the Linux, the touchpad doesn't
work, there is no interrupt when touching the touchpad, after
disable the runtime PM, everything works well.

I also tried the quirk of I2C_HID_QUIRK_DELAY_AFTER_SLEEP, it is
better after applied this quirk, there are interrupts but data it
reports is invalid.

Signed-off-by: Hui Wang <hui.wang@canonical.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
drivers/hid/hid-ids.h
drivers/hid/i2c-hid/i2c-hid-core.c

index b6d93f4..adce58f 100644 (file)
 #define USB_DEVICE_ID_SYNAPTICS_HD     0x0ac3
 #define USB_DEVICE_ID_SYNAPTICS_QUAD_HD        0x1ac3
 #define USB_DEVICE_ID_SYNAPTICS_TP_V103        0x5710
+#define I2C_DEVICE_ID_SYNAPTICS_7E7E   0x7e7e
 
 #define USB_VENDOR_ID_TEXAS_INSTRUMENTS        0x2047
 #define USB_DEVICE_ID_TEXAS_INSTRUMENTS_LENOVO_YOGA    0x0855
index 90164fe..4d1f24e 100644 (file)
@@ -184,6 +184,8 @@ static const struct i2c_hid_quirks {
                I2C_HID_QUIRK_NO_RUNTIME_PM },
        { USB_VENDOR_ID_ELAN, HID_ANY_ID,
                 I2C_HID_QUIRK_BOGUS_IRQ },
+       { USB_VENDOR_ID_SYNAPTICS, I2C_DEVICE_ID_SYNAPTICS_7E7E,
+               I2C_HID_QUIRK_NO_RUNTIME_PM },
        { 0, 0 }
 };