From patchwork Wed Feb 17 19:07:18 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Ronald_Tschal=C3=A4r?= X-Patchwork-Id: 384108 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=-18.8 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, 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 44BEEC433E0 for ; Wed, 17 Feb 2021 19:19:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0A53764E63 for ; Wed, 17 Feb 2021 19:19:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232367AbhBQTTO (ORCPT ); Wed, 17 Feb 2021 14:19:14 -0500 Received: from ec2-44-228-98-151.us-west-2.compute.amazonaws.com ([44.228.98.151]:58878 "EHLO chill.innovation.ch" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S232547AbhBQTTN (ORCPT ); Wed, 17 Feb 2021 14:19:13 -0500 X-Greylist: delayed 651 seconds by postgrey-1.27 at vger.kernel.org; Wed, 17 Feb 2021 14:19:10 EST Received: from localhost (localhost [127.0.0.1]) by chill.innovation.ch (Postfix) with ESMTP id 30D451B640F; Wed, 17 Feb 2021 19:07:32 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at chill.innovation.ch Received: from chill.innovation.ch ([127.0.0.1]) by localhost (chill.innovation.ch [127.0.0.1]) (amavisd-new, port 10024) with LMTP id 7BxdjnFa6Gfu; Wed, 17 Feb 2021 19:07:31 +0000 (UTC) From: =?utf-8?q?Ronald_Tschal=C3=A4r?= DKIM-Filter: OpenDKIM Filter v2.11.0 chill.innovation.ch 77B491B5EA9 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=innovation.ch; s=default; t=1613588851; bh=NTnBPdcPQ1mHAuBRtKTt9xZ5SgKJhiroAKknFH1WnTw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bjhz7O0GLjLTNOkGgBYYRnp9CBqiOsET9xfFY56qDsSxdHc7lpTIB8Nj5s8g0RGiX 4cJVGHvCZEkrfhaBvjueFaVDAUkMpdFoJVy+Ja9LoShKKssBoRdTneci9h3uTS/MIs NzrN6crorswasrDXGxzyydNVitahKYpClQ94koL7C9R554dJ38Y24OL87PrDWrci3S St0BCcJNP4kf06+0CipaFtNK2VwQ/kDrHG4g+v6UuA/cdT5eBqXFWlJd60NmbUk75+ ecC4d/6YGdC+ieNIb8JW15fcHsEpG+1NTvFW7NfbYc63ZIJkUVDiGlabMqH9Y52S2c wR4lmGJm+vm/g== To: Dmitry Torokhov Cc: "Gustavo A. R. Silva" , Sergiu Cuciurean , Lee Jones , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 3/3] Input: applespi: Add trace_event module param for early tracing. Date: Wed, 17 Feb 2021 11:07:18 -0800 Message-Id: <20210217190718.11035-3-ronald@innovation.ch> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210217190718.11035-1-ronald@innovation.ch> References: <20210217190718.11035-1-ronald@innovation.ch> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org The problem is that tracing can't be set via sysfs until the module is loaded, at which point the keyboard and trackpad initialization commands have already been run and hence tracing can't be used to debug problems here. Adding this param allows tracing to be enabled for messages sent and received during module probing. It takes comma-separated list of events, e.g. trace_event=applespi_tp_ini_cmd,applespi_bad_crc Signed-off-by: Ronald Tschalär Reported-by: kernel test robot Reported-by: kernel test robot --- drivers/input/keyboard/applespi.c | 32 +++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/drivers/input/keyboard/applespi.c b/drivers/input/keyboard/applespi.c index f0a0067c48ff6..03f9ad0f83967 100644 --- a/drivers/input/keyboard/applespi.c +++ b/drivers/input/keyboard/applespi.c @@ -53,6 +53,8 @@ #include #include #include +#include +#include #include #include @@ -110,6 +112,10 @@ module_param_string(touchpad_dimensions, touchpad_dimensions, sizeof(touchpad_dimensions), 0444); MODULE_PARM_DESC(touchpad_dimensions, "The pixel dimensions of the touchpad, as XxY+W+H ."); +static char *trace_event; +module_param(trace_event, charp, 0444); +MODULE_PARM_DESC(trace_event, "Enable early event tracing. It takes the form of a comma-separated list of events to enable."); + /** * struct keyboard_protocol - keyboard message. * message.type = 0x0110, message.length = 0x000a @@ -1645,6 +1651,30 @@ static void applespi_save_bl_level(struct applespi_data *applespi, "Error saving backlight level to EFI vars: %d\n", sts); } +static void applespi_enable_early_event_tracing(struct device *dev) +{ + char *buf, *event; + int sts; + + if (trace_event && trace_event[0]) { + buf = kstrdup(trace_event, GFP_KERNEL); + if (!buf) + return; + + while ((event = strsep(&buf, ","))) { + if (event[0]) { + sts = trace_set_clr_event("applespi", event, 1); + if (sts) + dev_warn(dev, + "Error setting trace event '%s': %d\n", + event, sts); + } + } + + kfree(buf); + } +} + static int applespi_probe(struct spi_device *spi) { struct applespi_data *applespi; @@ -1653,6 +1683,8 @@ static int applespi_probe(struct spi_device *spi) int sts, i; unsigned long long gpe, usb_status; + applespi_enable_early_event_tracing(&spi->dev); + /* check if the USB interface is present and enabled already */ acpi_sts = acpi_evaluate_integer(spi_handle, "UIST", NULL, &usb_status); if (ACPI_SUCCESS(acpi_sts) && usb_status) {