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51 lines
1.8 KiB
51 lines
1.8 KiB
From: Benjamin Tissoires <benjamin.tissoires@redhat.com>
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Date: Fri, 6 Mar 2015 11:14:42 -0500
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Subject: [PATCH] HID: multitouch: add support of clickpads
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Touchpads that have only one button are called clickpads and should
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be advertised as such by the kernel.
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Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
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Tested-by: Jason Ekstrand <jason@jlekstrand.net>
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---
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drivers/hid/hid-multitouch.c | 9 +++++++++
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1 file changed, 9 insertions(+)
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diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
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index 51e25b9407f2..a8e738191625 100644
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--- a/drivers/hid/hid-multitouch.c
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+++ b/drivers/hid/hid-multitouch.c
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@@ -115,6 +115,7 @@ struct mt_device {
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__u8 touches_by_report; /* how many touches are present in one report:
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* 1 means we should use a serial protocol
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* > 1 means hybrid (multitouch) protocol */
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+ __u8 buttons_count; /* number of physical buttons per touchpad */
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bool serial_maybe; /* need to check for serial protocol */
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bool curvalid; /* is the current contact valid? */
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unsigned mt_flags; /* flags to pass to input-mt */
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@@ -372,6 +373,10 @@ static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
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td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
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}
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+ /* count the buttons on touchpads */
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+ if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)
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+ td->buttons_count++;
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+
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if (usage->usage_index)
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prev_usage = &field->usage[usage->usage_index - 1];
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@@ -721,6 +726,10 @@ static void mt_touch_input_configured(struct hid_device *hdev,
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if (cls->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
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td->mt_flags |= INPUT_MT_DROP_UNUSED;
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+ /* check for clickpads */
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+ if ((td->mt_flags & INPUT_MT_POINTER) && (td->buttons_count == 1))
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+ __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
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+
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input_mt_init_slots(input, td->maxcontacts, td->mt_flags);
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td->mt_flags = 0;
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--
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2.1.0
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