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=-12.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MSGID_FROM_MTA_HEADER,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,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 2393FC433E2 for ; Mon, 14 Sep 2020 09:33:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B636C207EA for ; Mon, 14 Sep 2020 09:33:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=NXP1.onmicrosoft.com header.i=@NXP1.onmicrosoft.com header.b="d3cqzsXY" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726408AbgINJdk (ORCPT ); Mon, 14 Sep 2020 05:33:40 -0400 Received: from mail-am6eur05on2074.outbound.protection.outlook.com ([40.107.22.74]:45633 "EHLO EUR05-AM6-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726335AbgINJdE (ORCPT ); Mon, 14 Sep 2020 05:33:04 -0400 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=c+Bb5L261vHkT2139hJMsGGh157COytZBy06aMTSZQPm5UkXia06waka9TkTpuEWWpumG4H2YANManmsX43Sm78doMvNYq6KTE/tgoEWZ9DztIrd1bfG5XCRF2O/H+epQm6hhwyZsm/NieQOHEynfz0VqCAEWDJvTVAQFTPyOICTaAwtF2ymK8p5gDRu13i3tYe2pcF28WBmIl3/HWQWW5coT0SHnz6s4h1fTovdWinDSm4N11p1zPt8ZuGuEHbSw2I2nm/U8PqzqOjYBKOW5u8WLXE6/y32ZMA7UdrnY9d0ck5GhPNOqV/zmITVHGRXNq6uruxIoddQau9axTIQzQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=Qx+fvUeueNs7OsvsFQZr7T8aAABL4CCpTJI7Pg02XHA=; b=ezP6BB1aCtajGpXfWkUDGFpTOIYnnYJ/uxqh5RjXPK9MBiF7nsqR/ICofKRx/PrhMzbtyIQNHEQ1pees8ggJfoMoCAVoUfm0ZiSeG5K6+x2Y5kMPKIsqFGo/Q63uAv9o2Ia6S1owv6FnzMCS9H1WsV3kFF/+h0ndoN277ZwOz4NTNGLshV0rFfyABVkQslCxvkBbdH6j/c+WLpT8kJ+FhMpT7Xbvvn4bBbr/RV36lUhipzBLT1W8Wy3a5WZtmC4lL6S+ugDU5PPAaffhrA+TleqZx4KxxpZ0cK6k3bg5LET5R1USARcnbAIcV55Fiy/Y9scgZ7TtHNBBqA/0zmydmw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=oss.nxp.com; dmarc=pass action=none header.from=oss.nxp.com; dkim=pass header.d=oss.nxp.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=NXP1.onmicrosoft.com; s=selector2-NXP1-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=Qx+fvUeueNs7OsvsFQZr7T8aAABL4CCpTJI7Pg02XHA=; b=d3cqzsXY7wdNLf1PfaDKqPLx7kYP3PMflRwR2fB7p1/jTk5SyyDbEln9YZzlWm1EehoAYh/qJe0i+X3AOUfDvOhULwIxTiPSzfVfzHp5Wkm9avYQAq+8RKvkH1hD72Uk81BN51qislxLsp859qeA2ZzOAjbH5/1D5yoKvcJgNk0= Authentication-Results: kernel.org; dkim=none (message not signed) header.d=none;kernel.org; dmarc=none action=none header.from=oss.nxp.com; Received: from VI1PR0401MB2287.eurprd04.prod.outlook.com (2603:10a6:800:2e::19) by VE1PR04MB7405.eurprd04.prod.outlook.com (2603:10a6:800:1a4::24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3370.16; Mon, 14 Sep 2020 09:32:46 +0000 Received: from VI1PR0401MB2287.eurprd04.prod.outlook.com ([fe80::174:edc4:7d33:9c88]) by VI1PR0401MB2287.eurprd04.prod.outlook.com ([fe80::174:edc4:7d33:9c88%12]) with mapi id 15.20.3370.019; Mon, 14 Sep 2020 09:32:46 +0000 From: Daniel Baluta To: shawnguo@kernel.org, o.rempel@pengutronix.de Cc: kernel@pengutronix.de, s.hauer@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [RESEND PATCH 3/3] firmware: imx-dsp: Export functions to request/free channels Date: Mon, 14 Sep 2020 12:32:27 +0300 Message-Id: <20200914093227.5094-4-daniel.baluta@oss.nxp.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200914093227.5094-1-daniel.baluta@oss.nxp.com> References: <20200914093227.5094-1-daniel.baluta@oss.nxp.com> Content-Type: text/plain X-ClientProxiedBy: AM0PR06CA0133.eurprd06.prod.outlook.com (2603:10a6:208:ab::38) To VI1PR0401MB2287.eurprd04.prod.outlook.com (2603:10a6:800:2e::19) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from fsr-ub1864-103.ro-buh02.nxp.com (83.217.231.2) by AM0PR06CA0133.eurprd06.prod.outlook.com (2603:10a6:208:ab::38) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3370.16 via Frontend Transport; Mon, 14 Sep 2020 09:32:45 +0000 X-Mailer: git-send-email 2.17.1 X-Originating-IP: [83.217.231.2] X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-HT: Tenant X-MS-Office365-Filtering-Correlation-Id: a21a4737-770c-4031-1b3c-08d8589123a9 X-MS-TrafficTypeDiagnostic: VE1PR04MB7405: X-MS-Exchange-SharedMailbox-RoutingAgent-Processed: True X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:3631; X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: uPKlE2TTh0vHOhN6c5yGjfpia4/AR0qYmar4AWL3+l+fQwLIISo+5ds+cCOtTO04MjmNPfwKQxekiEJTOh2Okdgv5vMIhbFp5alqoAXpVunBVsYwMrHHx5b8pjn8bq66ow2Yt6OxHvYjUkg8CUH4UfXSk5jJ3I/IO7oAtdRmlxAgWSrCpOJuZcCNcAGSmEIXqZZQhVWO0KRHU6hpf6ZpIdRkrUKgmGDeBi/q5JkTdqQ5EaDAyeKebCubZBup6p2JnxZumxDCC9dirxX3skHJhRqp5ZOMc6yoRGMDfj4Bj01TbCn81zbMp8Pr2IzFSWjmEAZwcQyuOVa4HK+WBKL7EA== X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:VI1PR0401MB2287.eurprd04.prod.outlook.com;PTR:;CAT:NONE;SFS:(4636009)(346002)(366004)(39850400004)(376002)(136003)(396003)(6486002)(16526019)(86362001)(5660300002)(83380400001)(26005)(6666004)(66556008)(66946007)(66476007)(6512007)(1076003)(2906002)(52116002)(6506007)(316002)(8936002)(186003)(4326008)(956004)(2616005)(44832011)(478600001)(8676002);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData: 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 X-OriginatorOrg: oss.nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: a21a4737-770c-4031-1b3c-08d8589123a9 X-MS-Exchange-CrossTenant-AuthSource: VI1PR0401MB2287.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Sep 2020 09:32:46.6941 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: RtfvVe7Y6gI7MoaqavqdWBFq3HE2jBjO/Xnx7QkcU6GKQ/kguwxvB2itsVOrPGK726JEeA8O8nL8EFnpkGFVZw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: VE1PR04MB7405 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Daniel Baluta In order to save power, we only need to request a channel when the communication with the DSP active. For this we export the following functions: - imx_dsp_request_channel, gets a channel with a given index - imx_dsp_free_channel, frees a channel with a given index Notice that we still request channels at probe to support devices that do not have PM callbacks implemented. More explanations about why requesting a channel has an effect on power savings: - requesting an mailbox channel will call mailbox's startup function. - startup function calls pm_runtime_get_sync which increments device usage count and will keep the device active. Specifically, mailbox clock will be always ON when a mailbox channel is requested. Signed-off-by: Daniel Baluta --- drivers/firmware/imx/imx-dsp.c | 25 +++++++++++++++++++++++++ include/linux/firmware/imx/dsp.h | 10 ++++++++++ 2 files changed, 35 insertions(+) diff --git a/drivers/firmware/imx/imx-dsp.c b/drivers/firmware/imx/imx-dsp.c index b6e95d6d34c0..a6c06d7476c3 100644 --- a/drivers/firmware/imx/imx-dsp.c +++ b/drivers/firmware/imx/imx-dsp.c @@ -60,6 +60,31 @@ static void imx_dsp_handle_rx(struct mbox_client *c, void *msg) } } +struct mbox_chan *imx_dsp_request_channel(struct imx_dsp_ipc *dsp_ipc, int idx) +{ + struct imx_dsp_chan *dsp_chan; + + if (idx >= DSP_MU_CHAN_NUM) + return ERR_PTR(-EINVAL); + + dsp_chan = &dsp_ipc->chans[idx]; + dsp_chan->ch = mbox_request_channel_byname(&dsp_chan->cl, dsp_chan->name); + return dsp_chan->ch; +} +EXPORT_SYMBOL(imx_dsp_request_channel); + +void imx_dsp_free_channel(struct imx_dsp_ipc *dsp_ipc, int idx) +{ + struct imx_dsp_chan *dsp_chan; + + if (idx >= DSP_MU_CHAN_NUM) + return; + + dsp_chan = &dsp_ipc->chans[idx]; + mbox_free_channel(dsp_chan->ch); +} +EXPORT_SYMBOL(imx_dsp_free_channel); + static int imx_dsp_setup_channels(struct imx_dsp_ipc *dsp_ipc) { struct device *dev = dsp_ipc->dev; diff --git a/include/linux/firmware/imx/dsp.h b/include/linux/firmware/imx/dsp.h index 7562099c9e46..4f7895a3b73c 100644 --- a/include/linux/firmware/imx/dsp.h +++ b/include/linux/firmware/imx/dsp.h @@ -55,6 +55,9 @@ static inline void *imx_dsp_get_data(struct imx_dsp_ipc *ipc) int imx_dsp_ring_doorbell(struct imx_dsp_ipc *dsp, unsigned int chan_idx); +struct mbox_chan *imx_dsp_request_channel(struct imx_dsp_ipc *ipc, int idx); +void imx_dsp_free_channel(struct imx_dsp_ipc *ipc, int idx); + #else static inline int imx_dsp_ring_doorbell(struct imx_dsp_ipc *ipc, @@ -63,5 +66,12 @@ static inline int imx_dsp_ring_doorbell(struct imx_dsp_ipc *ipc, return -ENOTSUPP; } +struct mbox_chan *imx_dsp_request_channel(struct imx_dsp_ipc *ipc, int idx) +{ + return ERR_PTR(-EOPNOTSUPP); +} + +void imx_dsp_free_channel(struct imx_dsp_ipc *ipc, int idx) { } + #endif #endif /* _IMX_DSP_IPC_H */ -- 2.17.1 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=-14.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,MSGID_FROM_MTA_HEADER,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 1377AC433E2 for ; Mon, 14 Sep 2020 09:34:19 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B080120719 for ; Mon, 14 Sep 2020 09:34:18 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="c43FgyY3"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=NXP1.onmicrosoft.com header.i=@NXP1.onmicrosoft.com header.b="d3cqzsXY" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B080120719 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=oss.nxp.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=ff0j/JMr+G4/Oup5F0JQF8OfLS+6nULnYh3UCXR9aWE=; b=c43FgyY3vBje66mwG2qqIB/Sx 0F+sWnmXjOsXkp0PuliKPa9O9Mbj9HZiS4gdV7vgZOby8hhTfLDcx5BLY6+Z4t3nRp0KOSYs2QQLw /xXkeYuyz8IPekq5OMesj2dhxqlDbCHIZtgsmIvYsB7dbza0pra8Pe8/A6AxNNMRSNRK/yXmMPj2Y G4MtDVn/PHIsFA1E8gIMk4v5087U4AA/Xe2Y8KcaGX234XvZalR2uNMQwATkam62CuZnmVSXzJ9QU FuB440UDzsdB5Tf7584RWAn6aPIvBHdQ6pjTXJIpjp9Tgg+M5cC5ma2z7YmK3zPcea7nvDq1pfOru hn0Gjy8nA==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kHkr7-0005RH-Kl; Mon, 14 Sep 2020 09:33:01 +0000 Received: from mail-eopbgr140055.outbound.protection.outlook.com ([40.107.14.55] helo=EUR01-VE1-obe.outbound.protection.outlook.com) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kHkqw-0005NR-15 for linux-arm-kernel@lists.infradead.org; Mon, 14 Sep 2020 09:32:51 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=c+Bb5L261vHkT2139hJMsGGh157COytZBy06aMTSZQPm5UkXia06waka9TkTpuEWWpumG4H2YANManmsX43Sm78doMvNYq6KTE/tgoEWZ9DztIrd1bfG5XCRF2O/H+epQm6hhwyZsm/NieQOHEynfz0VqCAEWDJvTVAQFTPyOICTaAwtF2ymK8p5gDRu13i3tYe2pcF28WBmIl3/HWQWW5coT0SHnz6s4h1fTovdWinDSm4N11p1zPt8ZuGuEHbSw2I2nm/U8PqzqOjYBKOW5u8WLXE6/y32ZMA7UdrnY9d0ck5GhPNOqV/zmITVHGRXNq6uruxIoddQau9axTIQzQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=Qx+fvUeueNs7OsvsFQZr7T8aAABL4CCpTJI7Pg02XHA=; b=ezP6BB1aCtajGpXfWkUDGFpTOIYnnYJ/uxqh5RjXPK9MBiF7nsqR/ICofKRx/PrhMzbtyIQNHEQ1pees8ggJfoMoCAVoUfm0ZiSeG5K6+x2Y5kMPKIsqFGo/Q63uAv9o2Ia6S1owv6FnzMCS9H1WsV3kFF/+h0ndoN277ZwOz4NTNGLshV0rFfyABVkQslCxvkBbdH6j/c+WLpT8kJ+FhMpT7Xbvvn4bBbr/RV36lUhipzBLT1W8Wy3a5WZtmC4lL6S+ugDU5PPAaffhrA+TleqZx4KxxpZ0cK6k3bg5LET5R1USARcnbAIcV55Fiy/Y9scgZ7TtHNBBqA/0zmydmw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=oss.nxp.com; dmarc=pass action=none header.from=oss.nxp.com; dkim=pass header.d=oss.nxp.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=NXP1.onmicrosoft.com; s=selector2-NXP1-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=Qx+fvUeueNs7OsvsFQZr7T8aAABL4CCpTJI7Pg02XHA=; b=d3cqzsXY7wdNLf1PfaDKqPLx7kYP3PMflRwR2fB7p1/jTk5SyyDbEln9YZzlWm1EehoAYh/qJe0i+X3AOUfDvOhULwIxTiPSzfVfzHp5Wkm9avYQAq+8RKvkH1hD72Uk81BN51qislxLsp859qeA2ZzOAjbH5/1D5yoKvcJgNk0= Authentication-Results: kernel.org; dkim=none (message not signed) header.d=none;kernel.org; dmarc=none action=none header.from=oss.nxp.com; Received: from VI1PR0401MB2287.eurprd04.prod.outlook.com (2603:10a6:800:2e::19) by VE1PR04MB7405.eurprd04.prod.outlook.com (2603:10a6:800:1a4::24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3370.16; Mon, 14 Sep 2020 09:32:46 +0000 Received: from VI1PR0401MB2287.eurprd04.prod.outlook.com ([fe80::174:edc4:7d33:9c88]) by VI1PR0401MB2287.eurprd04.prod.outlook.com ([fe80::174:edc4:7d33:9c88%12]) with mapi id 15.20.3370.019; Mon, 14 Sep 2020 09:32:46 +0000 From: Daniel Baluta To: shawnguo@kernel.org, o.rempel@pengutronix.de Subject: [RESEND PATCH 3/3] firmware: imx-dsp: Export functions to request/free channels Date: Mon, 14 Sep 2020 12:32:27 +0300 Message-Id: <20200914093227.5094-4-daniel.baluta@oss.nxp.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200914093227.5094-1-daniel.baluta@oss.nxp.com> References: <20200914093227.5094-1-daniel.baluta@oss.nxp.com> X-ClientProxiedBy: AM0PR06CA0133.eurprd06.prod.outlook.com (2603:10a6:208:ab::38) To VI1PR0401MB2287.eurprd04.prod.outlook.com (2603:10a6:800:2e::19) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from fsr-ub1864-103.ro-buh02.nxp.com (83.217.231.2) by AM0PR06CA0133.eurprd06.prod.outlook.com (2603:10a6:208:ab::38) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3370.16 via Frontend Transport; Mon, 14 Sep 2020 09:32:45 +0000 X-Mailer: git-send-email 2.17.1 X-Originating-IP: [83.217.231.2] X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-HT: Tenant X-MS-Office365-Filtering-Correlation-Id: a21a4737-770c-4031-1b3c-08d8589123a9 X-MS-TrafficTypeDiagnostic: VE1PR04MB7405: X-MS-Exchange-SharedMailbox-RoutingAgent-Processed: True X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:3631; X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: uPKlE2TTh0vHOhN6c5yGjfpia4/AR0qYmar4AWL3+l+fQwLIISo+5ds+cCOtTO04MjmNPfwKQxekiEJTOh2Okdgv5vMIhbFp5alqoAXpVunBVsYwMrHHx5b8pjn8bq66ow2Yt6OxHvYjUkg8CUH4UfXSk5jJ3I/IO7oAtdRmlxAgWSrCpOJuZcCNcAGSmEIXqZZQhVWO0KRHU6hpf6ZpIdRkrUKgmGDeBi/q5JkTdqQ5EaDAyeKebCubZBup6p2JnxZumxDCC9dirxX3skHJhRqp5ZOMc6yoRGMDfj4Bj01TbCn81zbMp8Pr2IzFSWjmEAZwcQyuOVa4HK+WBKL7EA== X-Forefront-Antispam-Report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:VI1PR0401MB2287.eurprd04.prod.outlook.com; PTR:; CAT:NONE; SFS:(4636009)(346002)(366004)(39850400004)(376002)(136003)(396003)(6486002)(16526019)(86362001)(5660300002)(83380400001)(26005)(6666004)(66556008)(66946007)(66476007)(6512007)(1076003)(2906002)(52116002)(6506007)(316002)(8936002)(186003)(4326008)(956004)(2616005)(44832011)(478600001)(8676002); DIR:OUT; SFP:1101; X-MS-Exchange-AntiSpam-MessageData: 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 X-OriginatorOrg: oss.nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: a21a4737-770c-4031-1b3c-08d8589123a9 X-MS-Exchange-CrossTenant-AuthSource: VI1PR0401MB2287.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Sep 2020 09:32:46.6941 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: RtfvVe7Y6gI7MoaqavqdWBFq3HE2jBjO/Xnx7QkcU6GKQ/kguwxvB2itsVOrPGK726JEeA8O8nL8EFnpkGFVZw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: VE1PR04MB7405 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200914_053250_114355_958251B0 X-CRM114-Status: GOOD ( 16.33 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: s.hauer@pengutronix.de, linux-kernel@vger.kernel.org, linux-imx@nxp.com, kernel@pengutronix.de, festevam@gmail.com, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Daniel Baluta In order to save power, we only need to request a channel when the communication with the DSP active. For this we export the following functions: - imx_dsp_request_channel, gets a channel with a given index - imx_dsp_free_channel, frees a channel with a given index Notice that we still request channels at probe to support devices that do not have PM callbacks implemented. More explanations about why requesting a channel has an effect on power savings: - requesting an mailbox channel will call mailbox's startup function. - startup function calls pm_runtime_get_sync which increments device usage count and will keep the device active. Specifically, mailbox clock will be always ON when a mailbox channel is requested. Signed-off-by: Daniel Baluta --- drivers/firmware/imx/imx-dsp.c | 25 +++++++++++++++++++++++++ include/linux/firmware/imx/dsp.h | 10 ++++++++++ 2 files changed, 35 insertions(+) diff --git a/drivers/firmware/imx/imx-dsp.c b/drivers/firmware/imx/imx-dsp.c index b6e95d6d34c0..a6c06d7476c3 100644 --- a/drivers/firmware/imx/imx-dsp.c +++ b/drivers/firmware/imx/imx-dsp.c @@ -60,6 +60,31 @@ static void imx_dsp_handle_rx(struct mbox_client *c, void *msg) } } +struct mbox_chan *imx_dsp_request_channel(struct imx_dsp_ipc *dsp_ipc, int idx) +{ + struct imx_dsp_chan *dsp_chan; + + if (idx >= DSP_MU_CHAN_NUM) + return ERR_PTR(-EINVAL); + + dsp_chan = &dsp_ipc->chans[idx]; + dsp_chan->ch = mbox_request_channel_byname(&dsp_chan->cl, dsp_chan->name); + return dsp_chan->ch; +} +EXPORT_SYMBOL(imx_dsp_request_channel); + +void imx_dsp_free_channel(struct imx_dsp_ipc *dsp_ipc, int idx) +{ + struct imx_dsp_chan *dsp_chan; + + if (idx >= DSP_MU_CHAN_NUM) + return; + + dsp_chan = &dsp_ipc->chans[idx]; + mbox_free_channel(dsp_chan->ch); +} +EXPORT_SYMBOL(imx_dsp_free_channel); + static int imx_dsp_setup_channels(struct imx_dsp_ipc *dsp_ipc) { struct device *dev = dsp_ipc->dev; diff --git a/include/linux/firmware/imx/dsp.h b/include/linux/firmware/imx/dsp.h index 7562099c9e46..4f7895a3b73c 100644 --- a/include/linux/firmware/imx/dsp.h +++ b/include/linux/firmware/imx/dsp.h @@ -55,6 +55,9 @@ static inline void *imx_dsp_get_data(struct imx_dsp_ipc *ipc) int imx_dsp_ring_doorbell(struct imx_dsp_ipc *dsp, unsigned int chan_idx); +struct mbox_chan *imx_dsp_request_channel(struct imx_dsp_ipc *ipc, int idx); +void imx_dsp_free_channel(struct imx_dsp_ipc *ipc, int idx); + #else static inline int imx_dsp_ring_doorbell(struct imx_dsp_ipc *ipc, @@ -63,5 +66,12 @@ static inline int imx_dsp_ring_doorbell(struct imx_dsp_ipc *ipc, return -ENOTSUPP; } +struct mbox_chan *imx_dsp_request_channel(struct imx_dsp_ipc *ipc, int idx) +{ + return ERR_PTR(-EOPNOTSUPP); +} + +void imx_dsp_free_channel(struct imx_dsp_ipc *ipc, int idx) { } + #endif #endif /* _IMX_DSP_IPC_H */ -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel