From patchwork Sat Oct 24 12:46:41 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: 11854825 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8D1A992C for ; Sat, 24 Oct 2020 12:46:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 712C42076D for ; Sat, 24 Oct 2020 12:46:56 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=rere.qmqm.pl header.i=@rere.qmqm.pl header.b="mN3JKBQg" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761506AbgJXMqp (ORCPT ); Sat, 24 Oct 2020 08:46:45 -0400 Received: from rere.qmqm.pl ([91.227.64.183]:27411 "EHLO rere.qmqm.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1761491AbgJXMqn (ORCPT ); Sat, 24 Oct 2020 08:46:43 -0400 Received: from remote.user (localhost [127.0.0.1]) by rere.qmqm.pl (Postfix) with ESMTPSA id 4CJLSx4XBXzJf; Sat, 24 Oct 2020 14:46:41 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=rere.qmqm.pl; s=1; t=1603543601; bh=nLwavT2NA5+jIA2IuW6zD/l5oswZ/ngNahOWEbWGrOQ=; h=Date:In-Reply-To:References:From:Subject:To:Cc:From; b=mN3JKBQgwYkkw7RtAVytbbnLQouuVsg8RyBQ4cV1GfmDB+hY697utmlJNAZaNBQK1 lMSea0EnnGRcBBDMNzURVB5kw6v9Oa7KQD56S6B2AFU9CjvTUuLvDakNU+gcom0436 4FiLuFwmh0e9L7WZB+ZtFyg3e354E/bUTWWyz3/ctcYpIPyxd3J4yuKX5uVqGWDb45 AkQmYpu1ZzIP9yK5TCzJkBQ3DRbLTyQ+/hI5xgXbUy5yYvHVSMJzpFWIxvcsqvDEKd aLvk6q8UK0z3Pg/Jt3K0K3eQInGfgynvsao00D1PGvS6oU+tAKOOoNd68dcDXfhmoV Ti9F/euk6CFbQ== X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.102.4 at mail Date: Sat, 24 Oct 2020 14:46:41 +0200 Message-Id: <94eee607817c622c4fcb691a952ce8effe2456f8.1603543323.git.mirq-linux@rere.qmqm.pl> In-Reply-To: References: From: =?utf-8?b?TWljaGHFgiBNaXJvc8WCYXc=?= Subject: [PATCH v8 4/4] input: elants: support 0x66 reply opcode for reporting touches MIME-Version: 1.0 To: Dmitry Torokhov , Dmitry Osipenko , Johnny Chuang , Peter Hutterer , "Gustavo A. R. Silva" Cc: 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,