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author | Kai-Heng Feng <kai.heng.feng@canonical.com> | 2018-11-14 07:24:57 +0000 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-11-06 13:05:23 +0100 |
commit | e0bcac994ad8f83c9a0992ec2b62fc2d7deabf4e (patch) | |
tree | 35d5f6081068a84de2313b0c2978a96009b0103e /drivers/hid | |
parent | d8187ff32b23e4f83bc07976900d99f174540b0f (diff) | |
download | linux-stable-e0bcac994ad8f83c9a0992ec2b62fc2d7deabf4e.tar.gz linux-stable-e0bcac994ad8f83c9a0992ec2b62fc2d7deabf4e.tar.bz2 linux-stable-e0bcac994ad8f83c9a0992ec2b62fc2d7deabf4e.zip |
HID: i2c-hid: Disable runtime PM for LG touchscreen
[ Upstream commit 86c31524b27c7e686841dd4a79eda95cfd989f16 ]
LG touchscreen (1fd2:8001) stops working after reboot:
[ 4.859153] i2c_hid i2c-SAPS2101:00: i2c_hid_get_input: incomplete report (64/66)
[ 4.936070] i2c_hid i2c-SAPS2101:00: i2c_hid_get_input: incomplete report (64/66)
[ 9.948224] i2c_hid i2c-SAPS2101:00: failed to reset device.
The device in question stops working after receives SLEEP, ON, SLEEP
commands in a short period. The scenario is like this:
- Once the desktop session closes, it also closed the hid device, so the
device gets runtime suspended and receives a SLEEP command.
- Before calling shutdown callback, it gets runtime resumed and received
an ON command.
- In the shutdown callback, it receives another SLEEP command.
I failed to find a reliable interval between ON/SLEEP commands that can
make it work, so let's simply disable runtime PM for the device.
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/hid')
-rw-r--r-- | drivers/hid/hid-ids.h | 1 | ||||
-rw-r--r-- | drivers/hid/i2c-hid/i2c-hid-core.c | 2 |
2 files changed, 3 insertions, 0 deletions
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h index 0eeb273fb73d..6b33117ca60e 100644 --- a/drivers/hid/hid-ids.h +++ b/drivers/hid/hid-ids.h @@ -713,6 +713,7 @@ #define USB_VENDOR_ID_LG 0x1fd2 #define USB_DEVICE_ID_LG_MULTITOUCH 0x0064 #define USB_DEVICE_ID_LG_MELFAS_MT 0x6007 +#define I2C_DEVICE_ID_LG_8001 0x8001 #define USB_VENDOR_ID_LOGITECH 0x046d #define USB_DEVICE_ID_LOGITECH_AUDIOHUB 0x0a0e diff --git a/drivers/hid/i2c-hid/i2c-hid-core.c b/drivers/hid/i2c-hid/i2c-hid-core.c index 3cde7c1b9c33..8555ce7e737b 100644 --- a/drivers/hid/i2c-hid/i2c-hid-core.c +++ b/drivers/hid/i2c-hid/i2c-hid-core.c @@ -177,6 +177,8 @@ static const struct i2c_hid_quirks { I2C_HID_QUIRK_NO_RUNTIME_PM }, { I2C_VENDOR_ID_RAYDIUM, I2C_PRODUCT_ID_RAYDIUM_4B33, I2C_HID_QUIRK_DELAY_AFTER_SLEEP }, + { USB_VENDOR_ID_LG, I2C_DEVICE_ID_LG_8001, + I2C_HID_QUIRK_NO_RUNTIME_PM }, { 0, 0 } }; |