From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CFAD8C2D0C7 for ; Wed, 11 Dec 2019 16:02:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A431F2073D for ; Wed, 11 Dec 2019 16:02:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576080123; bh=JBmAVkhcp71r07TrM4idsZy9hXaAMVHGdeXcNZUvKro=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=wshPQOMwX1T8AltWwarT/pNIix6agfHruaX0a76rQ7oe5/65SUAy4z25AbeMg+Z+T S6OAmPPQXmmGHN+5xPfcpOXgMKH8IkI2ttoZwkYVbVkQByaGOTGa5vxActY2vPsdjl Bh8CRLmkywyLezr4fIy0J/jJ5ZVkAUYTlCmOJnS0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731396AbfLKPNV (ORCPT ); Wed, 11 Dec 2019 10:13:21 -0500 Received: from mail.kernel.org ([198.145.29.99]:36636 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731391AbfLKPNU (ORCPT ); Wed, 11 Dec 2019 10:13:20 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id CB9F52468A; Wed, 11 Dec 2019 15:13:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576077199; bh=JBmAVkhcp71r07TrM4idsZy9hXaAMVHGdeXcNZUvKro=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=MjDMPozJ6pUXzMDRy0Mv2fDQij8vW+gJVci64/nwbywQbWT+3FTgXPrtT5ZMhvTc0 3I3Pa4eAYXI06WBAYTQam6KksipFiFE5rg3Cs0fLJzHfEaWsiVXZlvAuHyGLlXQGWY LI3wDrp1RdWTxAKe5sgq5dZfN/B4zcn7UAtq5jDM= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: =?UTF-8?q?Bla=C5=BE=20Hrastnik?= , Benjamin Tissoires , Sasha Levin , linux-input@vger.kernel.org Subject: [PATCH AUTOSEL 5.4 082/134] HID: Improve Windows Precision Touchpad detection. Date: Wed, 11 Dec 2019 10:10:58 -0500 Message-Id: <20191211151150.19073-82-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191211151150.19073-1-sashal@kernel.org> References: <20191211151150.19073-1-sashal@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org From: Blaž Hrastnik [ Upstream commit 2dbc6f113acd74c66b04bf49fb027efd830b1c5a ] Per Microsoft spec, usage 0xC5 (page 0xFF) returns a blob containing data used to verify the touchpad as a Windows Precision Touchpad. 0x85, REPORTID_PTPHQA, // REPORT_ID (PTPHQA) 0x09, 0xC5, // USAGE (Vendor Usage 0xC5) 0x15, 0x00, // LOGICAL_MINIMUM (0) 0x26, 0xff, 0x00, // LOGICAL_MAXIMUM (0xff) 0x75, 0x08, // REPORT_SIZE (8) 0x96, 0x00, 0x01, // REPORT_COUNT (0x100 (256)) 0xb1, 0x02, // FEATURE (Data,Var,Abs) However, some devices, namely Microsoft's Surface line of products instead implement a "segmented device certification report" (usage 0xC6) which returns the same report, but in smaller chunks. 0x06, 0x00, 0xff, // USAGE_PAGE (Vendor Defined) 0x85, REPORTID_PTPHQA, // REPORT_ID (PTPHQA) 0x09, 0xC6, // USAGE (Vendor usage for segment #) 0x25, 0x08, // LOGICAL_MAXIMUM (8) 0x75, 0x08, // REPORT_SIZE (8) 0x95, 0x01, // REPORT_COUNT (1) 0xb1, 0x02, // FEATURE (Data,Var,Abs) 0x09, 0xC7, // USAGE (Vendor Usage) 0x26, 0xff, 0x00, // LOGICAL_MAXIMUM (0xff) 0x95, 0x20, // REPORT_COUNT (32) 0xb1, 0x02, // FEATURE (Data,Var,Abs) By expanding Win8 touchpad detection to also look for the segmented report, all Surface touchpads are now properly recognized by hid-multitouch. Signed-off-by: Blaž Hrastnik Signed-off-by: Benjamin Tissoires Signed-off-by: Sasha Levin --- drivers/hid/hid-core.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c index 2fa3587d974f4..e0b241bd3070c 100644 --- a/drivers/hid/hid-core.c +++ b/drivers/hid/hid-core.c @@ -781,6 +781,10 @@ static void hid_scan_feature_usage(struct hid_parser *parser, u32 usage) if (usage == 0xff0000c5 && parser->global.report_count == 256 && parser->global.report_size == 8) parser->scan_flags |= HID_SCAN_FLAG_MT_WIN_8; + + if (usage == 0xff0000c6 && parser->global.report_count == 1 && + parser->global.report_size == 8) + parser->scan_flags |= HID_SCAN_FLAG_MT_WIN_8; } static void hid_scan_collection(struct hid_parser *parser, unsigned type) -- 2.20.1