From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 15A0F35DA6A; Thu, 12 Mar 2026 20:23:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773346989; cv=none; b=Oj/N3YFK72rANso2LrruKs4kd589QYHovXLiq8A5jzpNwkDBdIuREf2WpT403N4oCgpnEmre3gwLATvIx/pZdULL5wqxYm6knd7G9C/YpBC6gan3/vb9AUfrwHw/coOF1WwTHdyb3GHsYd2gkUz3b4VKYExm/v4x8if2fokRjdE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773346989; c=relaxed/simple; bh=XnWcQ50rPKCV61W2PiTJKbi1zJKSb5K0uURFXFLiL9k=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=AYYKxfzMPv47I7aWw+aAUO85dBt3w4/NRjNQ8IsgZuDXWgPGlqkqq0vPhgtweXBZRQ/+44IFgVQlxKhj6hMMPN/UAOxlItOCr7H1oHvIOW/9yRzTokWz2jrzgvAdzw6H8Pv/9LyMDOfAlyKfgbidtIkqzfWvHnUznadF8UR/Qfs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=kPIe2xAT; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="kPIe2xAT" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2A688C4CEF7; Thu, 12 Mar 2026 20:23:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1773346988; bh=XnWcQ50rPKCV61W2PiTJKbi1zJKSb5K0uURFXFLiL9k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kPIe2xATBlpfo3GmgNpp3pQ2hJavFrIE0hOHd5xrGxnUEMkrDkL0V2m+3wUb7lbkX 6cJ7F6jI07Ag/AQ7WgNbBwFdlcRXLEy2rtHc4qo0+ZhSo2vaOlP2c9w5V0Am/9qZsv dLOZ2HVuS3W+O6YW90TBIGGzA74zoOzbclYGFUwU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Benjamin Tissoires , Kerem Karabay , Aditya Garg , Jiri Kosina , Sasha Levin Subject: [PATCH 6.12 174/265] HID: multitouch: Get the contact ID from HID_DG_TRANSDUCER_INDEX fields in case of Apple Touch Bar Date: Thu, 12 Mar 2026 21:09:21 +0100 Message-ID: <20260312201024.588757767@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260312201018.128816016@linuxfoundation.org> References: <20260312201018.128816016@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Kerem Karabay [ Upstream commit f41d736acc039d86512951f4e874b0f5e666babf ] In Apple Touch Bar, the contact ID is contained in fields with the HID_DG_TRANSDUCER_INDEX usage rather than HID_DG_CONTACTID, thus differing from the HID spec. Add a quirk for the same. Acked-by: Benjamin Tissoires Signed-off-by: Kerem Karabay Co-developed-by: Aditya Garg Signed-off-by: Aditya Garg Signed-off-by: Jiri Kosina Stable-dep-of: a2e70a89fa58 ("HID: multitouch: new class MT_CLS_EGALAX_P80H84") Signed-off-by: Sasha Levin --- drivers/hid/hid-multitouch.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c index c3a914458358c..b7c2640a61b4a 100644 --- a/drivers/hid/hid-multitouch.c +++ b/drivers/hid/hid-multitouch.c @@ -72,6 +72,7 @@ MODULE_LICENSE("GPL"); #define MT_QUIRK_FORCE_MULTI_INPUT BIT(20) #define MT_QUIRK_DISABLE_WAKEUP BIT(21) #define MT_QUIRK_ORIENTATION_INVERT BIT(22) +#define MT_QUIRK_APPLE_TOUCHBAR BIT(23) #define MT_INPUTMODE_TOUCHSCREEN 0x02 #define MT_INPUTMODE_TOUCHPAD 0x03 @@ -621,6 +622,7 @@ static struct mt_application *mt_find_application(struct mt_device *td, static struct mt_report_data *mt_allocate_report_data(struct mt_device *td, struct hid_report *report) { + struct mt_class *cls = &td->mtclass; struct mt_report_data *rdata; struct hid_field *field; int r, n; @@ -645,7 +647,11 @@ static struct mt_report_data *mt_allocate_report_data(struct mt_device *td, if (field->logical == HID_DG_FINGER || td->hdev->group != HID_GROUP_MULTITOUCH_WIN_8) { for (n = 0; n < field->report_count; n++) { - if (field->usage[n].hid == HID_DG_CONTACTID) { + unsigned int hid = field->usage[n].hid; + + if (hid == HID_DG_CONTACTID || + (cls->quirks & MT_QUIRK_APPLE_TOUCHBAR && + hid == HID_DG_TRANSDUCER_INDEX)) { rdata->is_mt_collection = true; break; } @@ -823,6 +829,14 @@ static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi, EV_KEY, BTN_TOUCH); MT_STORE_FIELD(tip_state); return 1; + case HID_DG_TRANSDUCER_INDEX: + /* + * Contact ID in case of Apple Touch Bars is contained + * in fields with HID_DG_TRANSDUCER_INDEX usage. + */ + if (!(cls->quirks & MT_QUIRK_APPLE_TOUCHBAR)) + return 0; + fallthrough; case HID_DG_CONTACTID: MT_STORE_FIELD(contactid); app->touches_by_report++; -- 2.51.0