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Commit 74e7c6c8 authored by Hui Wang's avatar Hui Wang Committed by Jiri Kosina
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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: default avatarHui Wang <hui.wang@canonical.com>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent 2bafa1e9

drivers/hid/hid-ids.h

+1 −0
Original line number Diff line number Diff line
@@ -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

drivers/hid/i2c-hid/i2c-hid-core.c

+2 −0
Original line number Diff line number Diff line
@@ -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 }

};