From patchwork Mon Apr 13 13:32:26 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: 11485589 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 ABF20913 for ; Mon, 13 Apr 2020 13:33:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 92A0D2075E for ; Mon, 13 Apr 2020 13:33:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=rere.qmqm.pl header.i=@rere.qmqm.pl header.b="XvYv+oF9" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729920AbgDMNcz (ORCPT ); Mon, 13 Apr 2020 09:32:55 -0400 Received: from rere.qmqm.pl ([91.227.64.183]:46043 "EHLO rere.qmqm.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729913AbgDMNc2 (ORCPT ); Mon, 13 Apr 2020 09:32:28 -0400 Received: from remote.user (localhost [127.0.0.1]) by rere.qmqm.pl (Postfix) with ESMTPSA id 4918gG5x96z2Dm; Mon, 13 Apr 2020 15:32:26 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=rere.qmqm.pl; s=1; t=1586784746; bh=WExwcmcV3+srt757VL+0Gk++xEQ7oGqZQCkIUrEiT1s=; h=Date:In-Reply-To:References:From:Subject:To:Cc:From; b=XvYv+oF9IGNF7BaJr9WGJrQ94EWzQf2xyP7j83g1ukY3TQvcDr+Pmq0RgX7/L7Vm6 v2C1ooeSNxIazXhZKu4hRbBWdsEzf7q1fSkhPwdJitgumYXnWs+bBOuQMHvorHmfRP SmZS7fE0gfXqtzJ2sQ47HmUE7UwtQ9RMSnKI8x/xMtHEIl1yrH+uXCyJIZGkWovJVr mHe0JqRPnmct3UpBjGavltJXhVdXnauX4Gck2slV117CGiN63XSKjfgR4a1Tm0tumg jv+xphpw+j69Dtc8cLcnenCBafJAs6wM4cMA5I9rllTNgYJBAyelQvmUmciTLKSZ/5 XHYttd8XChqFw== X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.102.2 at mail Date: Mon, 13 Apr 2020 15:32:26 +0200 Message-Id: In-Reply-To: References: From: =?utf-8?b?TWljaGHFgiBNaXJvc8WCYXc=?= Subject: [PATCH v3 7/9] input: elants: support 0x66 reply opcode for reporting touches MIME-Version: 1.0 To: Dmitry Osipenko , Dmitry Torokhov , Henrik Rydberg , James Chen , Johnny Chuang , Rob Herring , Scott Liu , David Heidelberg Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org Sender: linux-input-owner@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 2b936e920874..9751139e8507 100644 --- a/drivers/input/touchscreen/elants_i2c.c +++ b/drivers/input/touchscreen/elants_i2c.c @@ -60,6 +60,15 @@ #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 @@ -1050,7 +1059,6 @@ 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: @@ -1070,6 +1078,7 @@ 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,