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    Subject[PATCH 3.14 155/203] HID: usbhid: enable always-poll quirk for Elan Touchscreen
    Date
    3.14-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Johan Hovold <johan@kernel.org>

    commit bfe3c873e978d78b542a5852575dd74f4d1a5838 upstream.

    Enable the always-poll quirk for Elan Touchscreens found on some recent
    Samsung laptops.

    Without this quirk the device keeps disconnecting from the bus (and is
    re-enumerated) unless opened (and kept open, should an input event
    occur).

    Note that while the device can be run-time suspended, the autosuspend
    timeout must be high enough to allow the device to be polled at least
    once before being suspended. Specifically, using autosuspend_delay_ms=0
    will still cause the device to disconnect on input events.

    Signed-off-by: Johan Hovold <johan@kernel.org>
    Signed-off-by: Jiri Kosina <jkosina@suse.cz>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    drivers/hid/hid-ids.h | 3 +++
    drivers/hid/usbhid/hid-quirks.c | 1 +
    2 files changed, 4 insertions(+)

    --- a/drivers/hid/hid-ids.h
    +++ b/drivers/hid/hid-ids.h
    @@ -292,6 +292,9 @@
    #define USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_73F7 0x73f7
    #define USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001 0xa001

    +#define USB_VENDOR_ID_ELAN 0x04f3
    +#define USB_DEVICE_ID_ELAN_TOUCHSCREEN 0x0089
    +
    #define USB_VENDOR_ID_ELECOM 0x056e
    #define USB_DEVICE_ID_ELECOM_BM084 0x0061

    --- a/drivers/hid/usbhid/hid-quirks.c
    +++ b/drivers/hid/usbhid/hid-quirks.c
    @@ -69,6 +69,7 @@ static const struct hid_blacklist {
    { USB_VENDOR_ID_CH, USB_DEVICE_ID_CH_3AXIS_5BUTTON_STICK, HID_QUIRK_NOGET },
    { USB_VENDOR_ID_CH, USB_DEVICE_ID_CH_AXIS_295, HID_QUIRK_NOGET },
    { USB_VENDOR_ID_DMI, USB_DEVICE_ID_DMI_ENC, HID_QUIRK_NOGET },
    + { USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ELAN_TOUCHSCREEN, HID_QUIRK_ALWAYS_POLL },
    { USB_VENDOR_ID_ELO, USB_DEVICE_ID_ELO_TS2700, HID_QUIRK_NOGET },
    { USB_VENDOR_ID_FORMOSA, USB_DEVICE_ID_FORMOSA_IR_RECEIVER, HID_QUIRK_NO_INIT_REPORTS },
    { USB_VENDOR_ID_FREESCALE, USB_DEVICE_ID_FREESCALE_MX28, HID_QUIRK_NOGET },



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