HID: i2c-hid: Disable runtime PM on Synaptics touchpad

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>

diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index b6d93f4ad037e440d1e5d23d76058e4be606159c..adce58f24f7638a70c170f17a694b5baa7f5a49a 100644 (file)
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -1083,6 +1083,7 @@
 #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

diff --git a/drivers/hid/i2c-hid/i2c-hid-core.c b/drivers/hid/i2c-hid/i2c-hid-core.c
index 90164fed08d35eca2c34250c8b7cb3814ea99f53..4d1f24ee249c4455a4d5dfe18c7e6b0541311ad4 100644 (file)
--- a/drivers/hid/i2c-hid/i2c-hid-core.c
+++ b/drivers/hid/i2c-hid/i2c-hid-core.c
@@ -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 }
 };