• Kai-Heng Feng's avatar
    HID: i2c-hid: Disable runtime PM for LG touchscreen · 86c31524
    Kai-Heng Feng authored
    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: default avatarKai-Heng Feng <kai.heng.feng@canonical.com>
    Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
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