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From: Johan Hovold <johan@kernel.org>
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Date: Fri, 5 Sep 2014 18:08:48 +0200
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Subject: [PATCH] HID: usbhid: enable always-poll quirk for Elan Touchscreen
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Enable the always-poll quirk for Elan Touchscreens found on some recent
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Samsung laptops.
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Without this quirk the device keeps disconnecting from the bus (and is
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re-enumerated) unless opened (and kept open, should an input event
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occur).
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Note that while the device can be run-time suspended, the autosuspend
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timeout must be high enough to allow the device to be polled at least
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once before being suspended. Specifically, using autosuspend_delay_ms=0
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will still cause the device to disconnect on input events.
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Signed-off-by: Johan Hovold <johan@kernel.org>
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Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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---
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drivers/hid/hid-ids.h | 3 +++
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drivers/hid/usbhid/hid-quirks.c | 1 +
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2 files changed, 4 insertions(+)
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diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
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index 25cd674d6064..0d2e07dd71d8 100644
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--- a/drivers/hid/hid-ids.h
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+++ b/drivers/hid/hid-ids.h
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@@ -296,6 +296,9 @@
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#define USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_73F7 0x73f7
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#define USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001 0xa001
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+#define USB_VENDOR_ID_ELAN 0x04f3
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+#define USB_DEVICE_ID_ELAN_TOUCHSCREEN 0x0089
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+
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#define USB_VENDOR_ID_ELECOM 0x056e
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#define USB_DEVICE_ID_ELECOM_BM084 0x0061
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diff --git a/drivers/hid/usbhid/hid-quirks.c b/drivers/hid/usbhid/hid-quirks.c
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index 15225f3eaed1..ca18136ead15 100644
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--- a/drivers/hid/usbhid/hid-quirks.c
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+++ b/drivers/hid/usbhid/hid-quirks.c
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@@ -70,6 +70,7 @@ static const struct hid_blacklist {
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{ USB_VENDOR_ID_CH, USB_DEVICE_ID_CH_3AXIS_5BUTTON_STICK, HID_QUIRK_NOGET },
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{ USB_VENDOR_ID_CH, USB_DEVICE_ID_CH_AXIS_295, HID_QUIRK_NOGET },
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{ USB_VENDOR_ID_DMI, USB_DEVICE_ID_DMI_ENC, HID_QUIRK_NOGET },
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+ { USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ELAN_TOUCHSCREEN, HID_QUIRK_ALWAYS_POLL },
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{ USB_VENDOR_ID_ELO, USB_DEVICE_ID_ELO_TS2700, HID_QUIRK_NOGET },
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{ USB_VENDOR_ID_FORMOSA, USB_DEVICE_ID_FORMOSA_IR_RECEIVER, HID_QUIRK_NO_INIT_REPORTS },
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{ USB_VENDOR_ID_FREESCALE, USB_DEVICE_ID_FREESCALE_MX28, HID_QUIRK_NOGET },
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--
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1.9.3
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