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=-7.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, UNWANTED_LANGUAGE_BODY,URIBL_BLOCKED,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 D3AAECA9EC2 for ; Tue, 29 Oct 2019 07:21:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B43D520663 for ; Tue, 29 Oct 2019 07:21:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732811AbfJ2HV6 (ORCPT ); Tue, 29 Oct 2019 03:21:58 -0400 Received: from esa3.mentor.iphmx.com ([68.232.137.180]:41262 "EHLO esa3.mentor.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726362AbfJ2HV4 (ORCPT ); Tue, 29 Oct 2019 03:21:56 -0400 IronPort-SDR: O4ErAt7DStt+Db3YzjUlHQqdWXm/PsBuznNQYQyCoCAbo7xQJsyK1wANR7boIVbaAnoPHqOfG/ 9WJdW5f4DGqQHhjl7hvc8F5WKEXNiaHLPvKeysu1PRe0sj3lSHagOVQUYsZc+dyB0/CQ2muZrB QSOrSyKPZ093R6IOtc20eMUgj+fu3UwV6RxJ/renQ/NCcCThYNl511fqan/ixor4Mc1zOjBf2U YQS/H9LLBCeadFAyodSTZ7CY1qT4JzZuIfzfn6cbrYkIxBAaUbV4LC3S3JF+pQJkLTPk9YiP4X CWk= X-IronPort-AV: E=Sophos;i="5.68,243,1569312000"; d="scan'208";a="42663278" Received: from orw-gwy-01-in.mentorg.com ([192.94.38.165]) by esa3.mentor.iphmx.com with ESMTP; 28 Oct 2019 23:21:56 -0800 IronPort-SDR: gRBoj+f3UJVxfrmiMkmvcc7JecOflyMExY51jc2Y2EohzVxs2VWBOSVDwa3v6oQ1hc45sfg0Rc MCK+4I4oNTbzbQVXQQrvEECckFW7vOawiNzYZxitTm4O9tF4ZEm7PfpjV9AFWx/Tt89GVQl1n/ +pZQaS1B/ER52o0HrkN0LuEdHiR41PSk6nNqIJ6vJJq5oDKwoqiSJTic5mKPQjmElGVlSoEEmj xBj2PAo3SP2w7crxq/4owR4sTFlB4FPgKfb6KulmIHfx/Di1ueQaX9hc7offhFBsO/uiPLMgZ4 9OE= From: Jiada Wang To: , , , CC: , , , , Subject: [PATCH v4 28/48] Input: atmel_mxt_ts - implement debug output for messages Date: Tue, 29 Oct 2019 16:19:50 +0900 Message-ID: <20191029072010.8492-29-jiada_wang@mentor.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191029072010.8492-1-jiada_wang@mentor.com> References: <20191029072010.8492-1-jiada_wang@mentor.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Nick Dyer Add a debug switch which causes all messages from the touch controller to be dumped to the dmesg log with a set prefix "MXT MSG:". This is used by Atmel user-space utilities to debug touch operation. Enabling this output does impact touch performance. Signed-off-by: Nick Dyer (cherry picked from ndyer/linux/for-upstream commit 3c3fcfdd4889dfeb1c80ae8cd94a622c6342b06a) [gdavis: Forward port and fix conflicts.] Signed-off-by: George G. Davis Signed-off-by: Jiada Wang --- drivers/input/touchscreen/atmel_mxt_ts.c | 47 ++++++++++++++++++++++-- 1 file changed, 44 insertions(+), 3 deletions(-) diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c index 6685bda243ed..2b418536618b 100644 --- a/drivers/input/touchscreen/atmel_mxt_ts.c +++ b/drivers/input/touchscreen/atmel_mxt_ts.c @@ -335,6 +335,7 @@ struct mxt_data { u8 t100_aux_ampl; u8 t100_aux_area; u8 t100_aux_vect; + bool debug_enabled; u8 max_reportid; u32 config_crc; u32 info_crc; @@ -460,8 +461,11 @@ static bool mxt_object_readable(unsigned int type) static void mxt_dump_message(struct mxt_data *data, u8 *message) { - dev_dbg(&data->client->dev, "message: %*ph\n", - data->T5_msg_size, message); + /* debug message with prefix 'MXT MSG:' used by + * Atmel user-space utilities to debug touch operation + */ + dev_dbg(&data->client->dev, "MXT MSG: %*ph\n", + data->T5_msg_size, message); } static int mxt_wait_for_completion(struct mxt_data *data, @@ -1214,6 +1218,7 @@ static void mxt_proc_t93_messages(struct mxt_data *data, u8 *msg) static int mxt_proc_message(struct mxt_data *data, u8 *message) { u8 report_id = message[0]; + bool dump = data->debug_enabled; if (report_id == MXT_RPTID_NOMSG) return 0; @@ -1248,9 +1253,12 @@ static int mxt_proc_message(struct mxt_data *data, u8 *message) } else if (report_id == data->T93_reportid) { mxt_proc_t93_messages(data, message); } else { - mxt_dump_message(data, message); + dump = true; } + if (dump) + mxt_dump_message(data, message); + return 1; } @@ -3522,6 +3530,36 @@ static ssize_t mxt_update_cfg_store(struct device *dev, return ret; } +static ssize_t mxt_debug_enable_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct mxt_data *data = dev_get_drvdata(dev); + char c; + + c = data->debug_enabled ? '1' : '0'; + return scnprintf(buf, PAGE_SIZE, "%c\n", c); +} + +static ssize_t mxt_debug_enable_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + struct mxt_data *data = dev_get_drvdata(dev); + u8 i; + ssize_t ret; + + if (kstrtou8(buf, 0, &i) == 0 && i < 2) { + data->debug_enabled = (i == 1); + + dev_dbg(dev, "%s\n", i ? "debug enabled" : "debug disabled"); + ret = count; + } else { + dev_dbg(dev, "debug_enabled write error\n"); + ret = -EINVAL; + } + + return ret; +} + static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store); static struct attribute *mxt_fw_attrs[] = { @@ -3538,6 +3576,8 @@ static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL); static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL); static DEVICE_ATTR(update_cfg, S_IWUSR, NULL, mxt_update_cfg_store); static DEVICE_ATTR(config_crc, S_IRUGO, mxt_config_crc_show, NULL); +static DEVICE_ATTR(debug_enable, S_IWUSR | S_IRUSR, mxt_debug_enable_show, + mxt_debug_enable_store); static struct attribute *mxt_attrs[] = { &dev_attr_fw_version.attr, @@ -3545,6 +3585,7 @@ static struct attribute *mxt_attrs[] = { &dev_attr_object.attr, &dev_attr_update_cfg.attr, &dev_attr_config_crc.attr, + &dev_attr_debug_enable.attr, NULL }; -- 2.17.1