From patchwork Fri Dec 11 06:53:57 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?TWljaGHFgiBNaXJvc8WCYXc=?= X-Patchwork-Id: 11967343 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=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 D356DC2BBCA for ; Fri, 11 Dec 2020 06:55:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 994D623F2B for ; Fri, 11 Dec 2020 06:55:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391381AbgLKGym (ORCPT ); Fri, 11 Dec 2020 01:54:42 -0500 Received: from rere.qmqm.pl ([91.227.64.183]:29226 "EHLO rere.qmqm.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2436553AbgLKGyf (ORCPT ); Fri, 11 Dec 2020 01:54:35 -0500 Received: from remote.user (localhost [127.0.0.1]) by rere.qmqm.pl (Postfix) with ESMTPSA id 4CshMk03d5z5m; Fri, 11 Dec 2020 07:53:53 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=rere.qmqm.pl; s=1; t=1607669634; bh=nLwavT2NA5+jIA2IuW6zD/l5oswZ/ngNahOWEbWGrOQ=; h=Date:In-Reply-To:References:From:Subject:To:Cc:From; b=X/yNYtguzcKvSFixjEv3sNVBHkr+D6rP4YN8vnLYYSH+UZwJuAlzT0Y1lNXELmyCT BRaCz6rRphFCseZveDgR8lnyBfSRJ0aT9kpXgyqAXPalR3ELThThs4Fza/dwaDMULq m4IhRAu3ymalNkpvCKNVrbB0NS+bMJfGDpwZv5MshP/2ouEvEweKHEfUrmUbX7xtow 9yQ5jbGlq3ukFDe3fsT+8YvgXIPQmySdAFYOvm/wXh7f7zCPs/Ivf4TmUAMpjFjfeN TYpAE2L4DEef31rr8kg9jkIIXS/2wrBHeav780kkdqbT1uS5k9hU0/NKPE0y6hFTVT SmZpRvuyxN8Sg== X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.102.4 at mail Date: Fri, 11 Dec 2020 07:53:57 +0100 Message-Id: In-Reply-To: References: From: =?utf-8?b?TWljaGHFgiBNaXJvc8WCYXc=?= Subject: [PATCH RESEND v8 4/4] input: elants: support 0x66 reply opcode for reporting touches MIME-Version: 1.0 To: Dmitry Torokhov Cc: Dmitry Osipenko , Johnny Chuang , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org From: Dmitry Osipenko eKTF3624 touchscreen firmware uses two variants of the reply opcodes for reporting touch events: one is 0x63 (used by older firmware) and other is 0x66 (used by newer firmware). The 0x66 variant is equal to 0x63 of eKTH3500, while 0x63 needs small adjustment of the touch pressure value. Nexus 7 tablet device has eKTF3624 touchscreen and it uses 0x66 opcode for reporting touch events, let's support it now. Other devices, eg. ASUS TF300T, use 0x63. Note: CMD_HEADER_REK is used for replying to calibration requests, it has the same 0x66 opcode number which eKTF3624 uses for reporting touches. The calibration replies are handled separately from the the rest of the commands in the driver by entering into ELAN_WAIT_RECALIBRATION state and thus this change shouldn't change the old behavior. Signed-off-by: Dmitry Osipenko Tested-by: Michał Mirosław Signed-off-by: Michał Mirosław --- drivers/input/touchscreen/elants_i2c.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/input/touchscreen/elants_i2c.c b/drivers/input/touchscreen/elants_i2c.c index c24d8cdc4251..1cbda6f20d07 100644 --- a/drivers/input/touchscreen/elants_i2c.c +++ b/drivers/input/touchscreen/elants_i2c.c @@ -61,6 +61,15 @@ #define QUEUE_HEADER_NORMAL 0X63 #define QUEUE_HEADER_WAIT 0x64 +/* + * Depending on firmware version, eKTF3624 touchscreens may utilize one of + * these opcodes for the touch events: 0x63 and 0x66. The 0x63 is used by + * older firmware version and differs from 0x66 such that touch pressure + * value needs to be adjusted. The 0x66 opcode of newer firmware is equal + * to 0x63 of eKTH3500. + */ +#define QUEUE_HEADER_NORMAL2 0x66 + /* Command header definition */ #define CMD_HEADER_WRITE 0x54 #define CMD_HEADER_READ 0x53 @@ -1052,7 +1061,6 @@ static irqreturn_t elants_i2c_irq(int irq, void *_dev) switch (ts->buf[FW_HDR_TYPE]) { case CMD_HEADER_HELLO: case CMD_HEADER_RESP: - case CMD_HEADER_REK: break; case QUEUE_HEADER_WAIT: @@ -1072,6 +1080,7 @@ static irqreturn_t elants_i2c_irq(int irq, void *_dev) break; case QUEUE_HEADER_NORMAL: + case QUEUE_HEADER_NORMAL2: report_count = ts->buf[FW_HDR_COUNT]; if (report_count == 0 || report_count > 3) { dev_err(&client->dev,