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=-8.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,USER_AGENT_GIT autolearn=ham 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 79140C004C9 for ; Tue, 7 May 2019 18:53:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4EEAC2054F for ; Tue, 7 May 2019 18:53:31 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="pc75Btdx" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727428AbfEGSxa (ORCPT ); Tue, 7 May 2019 14:53:30 -0400 Received: from mail-pf1-f196.google.com ([209.85.210.196]:42529 "EHLO mail-pf1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726464AbfEGSxa (ORCPT ); Tue, 7 May 2019 14:53:30 -0400 Received: by mail-pf1-f196.google.com with SMTP id 13so8808314pfw.9; Tue, 07 May 2019 11:53:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=KRHKxRuysYGgXbbpO6rIqlLn4waiOgs8Pmx2aAZVU0c=; b=pc75Btdxymf408ZedJHdUp37dGFrkRgw8TkbRkyyn8UoVtXDi2pdzijYyJPK+3ziLc 6ogOXccq+keIL6YyTb1Alk8hM6wc0uaaZ7ujkP3Rw7F58GLRcZRR7Vka/pACebpLITLb ZcjDfdQJiH7LgRsrLE4jplchGTnfHZhQwIbT7prYY3UB03V3803fBwnfXkk5WzET6T// JkuPdriYToR1dHzP7QBAA3sYFj4UX4QXhsxYKrlLyzO3/OyXoXm+ZMsEVpurTyJkfmnD YCkUeRzDSomTfmR3S59CBksA6+ujDSYdYWh5qG2sccugYlWwHnFVCwW8PBWl0m9K3sxG WTqQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=KRHKxRuysYGgXbbpO6rIqlLn4waiOgs8Pmx2aAZVU0c=; b=rlau2MRBvII87q7wum+dsCsjFYy+fpTFwwfbyswZ23xBoDyqQsvFxfMVl5S/RqQ93F Z+sThyA2YKtYgod8j9HsJV/Dq0oFNdCpuVuJ7Zox9PhC/WZzP2mMasOd1TDQnSTEPFGa hscryhTQFdyeWMrv34l8hE3WSo2AhmlFC4fFSWChMIUuJugZN/q0LL3lcpnxYfPDqHO0 Pdlph8oC+8zVKijvd1pVYsUPa1VG0KfPi/4BwcfzAqJMwq1uxT92qnzgENm8ZzpiLU8W 61pjFpyVh39D75oZSArjGtO4dM/9czf6sC1ZwQmttK82fOOHw3rs0TR35HOdvHQtut54 ELbw== X-Gm-Message-State: APjAAAUlIYFs660Te47Jh3oaga3zvq9b4GZFBKKIsJ9VDk1VNd/7ueUv /UXE2iJTNCe6j+XzcDV/IrZwvFpV X-Google-Smtp-Source: APXvYqyi+fWAto7XDdqYbv7JImcBdCxW466JgklIplZkE8iDrqLTtzFV/ZwsdudpHkP0SMa10pYk4Q== X-Received: by 2002:a62:164f:: with SMTP id 76mr43451592pfw.172.1557255209363; Tue, 07 May 2019 11:53:29 -0700 (PDT) Received: from US-191-ENG0002.corp.onewacom.com ([50.225.60.4]) by smtp.gmail.com with ESMTPSA id w189sm20085506pfw.147.2019.05.07.11.53.27 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 07 May 2019 11:53:28 -0700 (PDT) From: "Gerecke, Jason" X-Google-Original-From: "Gerecke, Jason" To: linux-input@vger.kernel.org, Benjamin Tissoires Cc: Ping Cheng , Aaron Armstrong Skomra , Jason Gerecke , stable@vger.kernel.org Subject: [PATCH 3/3] HID: wacom: Sync INTUOSP2_BT touch state after each frame if necessary Date: Tue, 7 May 2019 11:53:22 -0700 Message-Id: <20190507185322.7168-3-jason.gerecke@wacom.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190507185322.7168-1-jason.gerecke@wacom.com> References: <20190507185322.7168-1-jason.gerecke@wacom.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Jason Gerecke The Bluetooth interface of the 2nd-gen Intuos Pro batches together four independent "frames" of finger data into a single report. Each frame is essentially equivalent to a single USB report, with the up-to-10 fingers worth of information being spread across two frames. At the moment the driver only calls `input_sync` after processing all four frames have been processed, which can result in the driver sending multiple updates for a single slot within the same SYN_REPORT. This can confuse userspace, so modify the driver to sync more often if necessary (i.e., after reporting the state of all fingers). Fixes: 4922cd26f0 ("HID: wacom: Support 2nd-gen Intuos Pro's Bluetooth classic interface") Cc: # 4.11+ Signed-off-by: Jason Gerecke --- drivers/hid/wacom_wac.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/hid/wacom_wac.c b/drivers/hid/wacom_wac.c index e848445236d8..09b8e4aac82f 100644 --- a/drivers/hid/wacom_wac.c +++ b/drivers/hid/wacom_wac.c @@ -1371,11 +1371,17 @@ static void wacom_intuos_pro2_bt_touch(struct wacom_wac *wacom) if (wacom->num_contacts_left <= 0) { wacom->num_contacts_left = 0; wacom->shared->touch_down = wacom_wac_finger_count_touches(wacom); + input_sync(touch_input); } } - input_report_switch(touch_input, SW_MUTE_DEVICE, !(data[281] >> 7)); - input_sync(touch_input); + if (wacom->num_contacts_left == 0) { + // Be careful that we don't accidentally call input_sync with + // only a partial set of fingers of processed + input_report_switch(touch_input, SW_MUTE_DEVICE, !(data[281] >> 7)); + input_sync(touch_input); + } + } static void wacom_intuos_pro2_bt_pad(struct wacom_wac *wacom) -- 2.21.0