From patchwork Mon Nov 14 10:29:55 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Charles Keepax X-Patchwork-Id: 19667 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:6687:0:0:0:0:0 with SMTP id l7csp2073479wru; Mon, 14 Nov 2022 02:39:02 -0800 (PST) X-Google-Smtp-Source: AA0mqf42XGKPotjsJPR+jTapqjg9d5OHQ8eIO/a4SvvlJ812oy5EHkkkAGbY+/n9qDy41V8V6VpZ X-Received: by 2002:a05:6a00:3485:b0:571:fa1d:85b7 with SMTP id cp5-20020a056a00348500b00571fa1d85b7mr6392391pfb.39.1668422342065; Mon, 14 Nov 2022 02:39:02 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1668422342; cv=none; d=google.com; s=arc-20160816; b=uzYFqbvn+swzHVb6kKBAafFOf2CW2visfAftOJLeVxjJ1jq0u25CoPoyBT9NH2wGD6 tOYih3gB7JWlOgH+0+tXQRk6vHTBWTGiVYnUcuJelJU1XNW9amTeGRbKNuXh6y2Cbmm2 +XxMr2faNSdJr42xTtT7Fhzhqg59BG2Jtf4Jaon6YeEnm9k+1fSDahjBABYlEXtSi3ic rQMPcPcRkvMYdAMXam8MneaC47D6t/oso6/uRp2oMxEM3CFtRzVUWSp/qWeRGA3bZqS6 FwX0Xo+fru6FSkGXnZMsLrJ+gdZPJtv3h70thgObZqfIUmIXBFoeesIXoontKwaQNG6b tEMA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=wR8WznTLjHtXuxSzrfRxj5uzxnQfyrE3rhFbBYPUl9E=; b=e4B4jWk3Ht1wMQwV8G8RT0N6sT7sCVGlrtroMixCnK1dWj06hDDVdLDMYc1vZ8w0KY bBcSWAOj7f65den6bqSw6amb18o0WxJ71z38eGukHb9cmy57v7DrdVzWU+K2piDL6d1S 3k3zubLkhL+uxkQM+tugAGhyyr+mYxdEhFQbdQL5iHJtp4fDDSgsn7tvSRpaNsdyqWif Ss8o7mMiCdIyUaUDquDr0e3sS8Nat6eoQra5XcOAYX+IJNaFdoElVtzhclGMfgyK/n6S WR1eMg0AbyQKXnYzYOZ0WrZ3LxCtZvqVnGr0us7a6p/hFJxv/Lodo9cmEz+ZBeOGjkza yZ5A== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@cirrus.com header.s=PODMain02222019 header.b=Pz4b01vd; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=cirrus.com Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id w14-20020a17090a8a0e00b002135a4d80d7si9029683pjn.188.2022.11.14.02.38.49; Mon, 14 Nov 2022 02:39:02 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@cirrus.com header.s=PODMain02222019 header.b=Pz4b01vd; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=cirrus.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236484AbiKNKbu (ORCPT + 99 others); Mon, 14 Nov 2022 05:31:50 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59232 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236564AbiKNKbP (ORCPT ); Mon, 14 Nov 2022 05:31:15 -0500 Received: from mx0b-001ae601.pphosted.com (mx0b-001ae601.pphosted.com [67.231.152.168]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9B55714D2C for ; Mon, 14 Nov 2022 02:31:13 -0800 (PST) Received: from pps.filterd (m0077474.ppops.net [127.0.0.1]) by mx0b-001ae601.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 2AE8Wcie019990; Mon, 14 Nov 2022 04:29:59 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cirrus.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding : content-type; s=PODMain02222019; bh=wR8WznTLjHtXuxSzrfRxj5uzxnQfyrE3rhFbBYPUl9E=; b=Pz4b01vd4pkAmDey1/iXQitssuwC7GwX/0K9JnvGvgzq+o8fE3FKSzfVCrzQ8Jc8bLdH hUZSQjs7aVA0wl0SY5u41xvH6fdat2Wubil7qfcEUfs9dZQ3KTbUesGKBmTQyQFnxmGC CaKTjyNWg9bPUOBXfPX6p5I7RVetKAbVq68YEF28OxaYf5e9Qyzy5eI30XtRmrsNR3C0 zEr97UTqDoo65QFwA6CpB4DA0ybLEgHy07ISEsYOJSeJ2ryxUpVICeaRcVYBvHHCjexb 7CQ+/rz5wt7GIMPpJhiwKZUDjCrLGKKpBh2AmtA1srIZGO+B0LUVym/B/Ge74BkQwZdG uA== Received: from ediex01.ad.cirrus.com ([84.19.233.68]) by mx0b-001ae601.pphosted.com (PPS) with ESMTPS id 3kt8sst0cm-3 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 14 Nov 2022 04:29:59 -0600 Received: from ediex01.ad.cirrus.com (198.61.84.80) by ediex01.ad.cirrus.com (198.61.84.80) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.15; Mon, 14 Nov 2022 04:29:56 -0600 Received: from ediswmail.ad.cirrus.com (198.61.86.93) by ediex01.ad.cirrus.com (198.61.84.80) with Microsoft SMTP Server id 15.2.1118.15 via Frontend Transport; Mon, 14 Nov 2022 04:29:56 -0600 Received: from algalon.ad.cirrus.com (algalon.ad.cirrus.com [198.90.251.122]) by ediswmail.ad.cirrus.com (Postfix) with ESMTP id 66CF8B2F; Mon, 14 Nov 2022 10:29:56 +0000 (UTC) From: Charles Keepax To: CC: , , , , , Subject: [PATCH 3/4] soundwire: debugfs: Switch to sdw_read_no_pm Date: Mon, 14 Nov 2022 10:29:55 +0000 Message-ID: <20221114102956.914468-4-ckeepax@opensource.cirrus.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20221114102956.914468-1-ckeepax@opensource.cirrus.com> References: <20221114102956.914468-1-ckeepax@opensource.cirrus.com> MIME-Version: 1.0 X-Proofpoint-GUID: Q3wEA4SA0jb2CYzwI9IxJadDNNpQfAj0 X-Proofpoint-ORIG-GUID: Q3wEA4SA0jb2CYzwI9IxJadDNNpQfAj0 X-Proofpoint-Spam-Reason: safe X-Spam-Status: No, score=-2.7 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_EF,RCVD_IN_DNSWL_LOW,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1749467625568582166?= X-GMAIL-MSGID: =?utf-8?q?1749467625568582166?= It is rather inefficient to be constantly enabling/disabling the PM runtime as we print out each individual register, switch to holding a PM runtime reference across the whole register output. Signed-off-by: Charles Keepax --- drivers/soundwire/debugfs.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/soundwire/debugfs.c b/drivers/soundwire/debugfs.c index 49900cd207bc7..0718e9cda138a 100644 --- a/drivers/soundwire/debugfs.c +++ b/drivers/soundwire/debugfs.c @@ -4,6 +4,7 @@ #include #include #include +#include #include #include #include @@ -35,7 +36,7 @@ static ssize_t sdw_sprintf(struct sdw_slave *slave, { int value; - value = sdw_read(slave, reg); + value = sdw_read_no_pm(slave, reg); if (value < 0) return scnprintf(buf + pos, RD_BUF - pos, "%3x\tXX\n", reg); @@ -55,6 +56,10 @@ static int sdw_slave_reg_show(struct seq_file *s_file, void *data) if (!buf) return -ENOMEM; + ret = pm_runtime_resume_and_get(&slave->dev); + if (ret < 0 && ret != -EACCES) + return ret; + ret = scnprintf(buf, RD_BUF, "Register Value\n"); /* DP0 non-banked registers */ @@ -112,6 +117,10 @@ static int sdw_slave_reg_show(struct seq_file *s_file, void *data) } seq_printf(s_file, "%s", buf); + + pm_runtime_mark_last_busy(&slave->dev); + pm_runtime_put(&slave->dev); + kfree(buf); return 0;