From patchwork Mon Jun 10 14:16:07 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Baluta X-Patchwork-Id: 10985013 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B5F546C5 for ; Mon, 10 Jun 2019 14:14:41 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A2F08286DE for ; Mon, 10 Jun 2019 14:14:41 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 833EF2876E; Mon, 10 Jun 2019 14:14:41 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 323EB286DE for ; Mon, 10 Jun 2019 14:14:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: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:In-Reply-To: References:List-Owner; bh=JkLqHcYLaLvt0qF39pJ1NL9hE+3tO2hNmI+fLGYLcPA=; b=tXO bGW4Nl2m6tMkjj9uX+HHq6XheARPJNp8mUNN9srS4KHQ7/DSoy59riDFnVGO1qL3WkKue2Dgqcaly FlM8c87ixw4v8NYHADMu7FQ7GvPG6TcZJH87r6EoXEmbzSktqEeKIQN3ZTv7fA/3cWM6Yuc+6sp/b HjIViinfIzES9bfyVrmHj7FJ5CK/Ud6iM+b0bU2DFgOernGQrwoxsSXHGA+DGnlT0/KiMXWs64J+f RRoWbq+HCiniWL+ec2gthwg9B30RofM1IqFkYeyXZDx0VgXFk7EVKPkO8EpLIOd74hJLi7KF5RmX+ 0O3pzAuiB0lgyEXEglebwwMkK51wy1A==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1haL4H-0002gK-CR; Mon, 10 Jun 2019 14:14:37 +0000 Received: from inva020.nxp.com ([92.121.34.13]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1haL4E-0002fD-DN for linux-arm-kernel@lists.infradead.org; Mon, 10 Jun 2019 14:14:35 +0000 Received: from inva020.nxp.com (localhost [127.0.0.1]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id E3FDF1A0854; Mon, 10 Jun 2019 16:14:30 +0200 (CEST) Received: from invc005.ap-rdc01.nxp.com (invc005.ap-rdc01.nxp.com [165.114.16.14]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 0653F1A0855; Mon, 10 Jun 2019 16:14:26 +0200 (CEST) Received: from localhost.localdomain (mega.ap.freescale.net [10.192.208.232]) by invc005.ap-rdc01.nxp.com (Postfix) with ESMTP id A4929402C0; Mon, 10 Jun 2019 22:14:19 +0800 (SGT) From: daniel.baluta@nxp.com To: jassisinghbrar@gmail.com, o.rempel@pengutronix.de Subject: [RFC PATCH 0/2] Introduce Tx doorbell with ACK Date: Mon, 10 Jun 2019 22:16:07 +0800 Message-Id: <20190610141609.17559-1-daniel.baluta@nxp.com> X-Mailer: git-send-email 2.17.1 X-Virus-Scanned: ClamAV using ClamSMTP X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190610_071434_592750_C08769B3 X-CRM114-Status: UNSURE ( 6.79 ) X-CRM114-Notice: Please train this message. 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: aisheng.dong@nxp.com, shawnguo@kernel.org, s.hauer@pengutronix.de, linux-kernel@vger.kernel.org, Daniel Baluta , linux-imx@nxp.com, kernel@pengutronix.de, festevam@gmail.com, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Daniel Baluta We need this in order to implement the communication protocol between Linux kernel SOF IPC layer and DSP firmware found on i.MX8 boards. First patch is just a bugfix and can be merged as it is. The second patch is just a RFC to open the discussion on how to use the i.MX mailbox API in order to communicate with the DSP. I want to know if this scenario can be supported by the mailbox abstraction of MU or should I go back and directly access MU registers. We need to have two MU channels: - channel #0, Host sends notification (via GIR) to DSP and gets a reply (via GIP) - channel #1, DSP sends message to Host (via GIR) and gets a reply (via GIP). The details of the protocol can be found in patch 2. Daniel Baluta (2): mailbox: imx: Clear GIEn bit at shutdown imx: mailbox: Introduce TX doorbell with ACK drivers/mailbox/imx-mailbox.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)