From patchwork Wed Apr 17 10:45:06 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Frederic Chen X-Patchwork-Id: 10905211 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 DBA8817E6 for ; Wed, 17 Apr 2019 10:45:50 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BF881289F5 for ; Wed, 17 Apr 2019 10:45:50 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id AEDC228AD4; Wed, 17 Apr 2019 10:45:50 +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,UNPARSEABLE_RELAY autolearn=unavailable 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 64A80289F5 for ; Wed, 17 Apr 2019 10:45:50 +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: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=C2XIXIOLVOb8GqQcQO8oxE4GH87/PBygobQUTG+uEKU=; b=gK7J2OId+UwJTl VY6rNZx40dVDeb793nnBmkc2j0J0/s7+K0K7niLS0q7LRC4aFQ7epA6VR7fh6nIyX1sDARHHmDAxs V+Yse2l0U0/n1wWvgkq/cSET1iAHQoKDh5wT1L8hIRgILy8+ZT69xNU/Fhi1EYSPd6udxR23tF+qF b8FJKa1bDrEdMdsCQjF4rLCvHFU4SQ3HxcVIVgz5axFIlXu8JGholdtN33TCmdBso/TPGZuqhHKt1 zgmHD0AV2wRMO/jRSzVoZmKE72iQ+44IazcMfvi/FhV7sduDth+QO59BLcKCQekEQNOFmAW0TfhmF Q6/8YPQtXqVP7/smEx5Q==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hGi4V-0002fM-V8; Wed, 17 Apr 2019 10:45:43 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1hGi4R-0002dl-BJ; Wed, 17 Apr 2019 10:45:42 +0000 X-UUID: 7f688044dc944204860e14c95ea19e8a-20190417 X-UUID: 7f688044dc944204860e14c95ea19e8a-20190417 Received: from mtkcas67.mediatek.inc [(172.29.193.45)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 457661296; Wed, 17 Apr 2019 02:45:31 -0800 Received: from MTKMBS06N1.mediatek.inc (172.21.101.129) by MTKMBS62N1.mediatek.inc (172.29.193.41) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Wed, 17 Apr 2019 03:45:30 -0700 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs06n1.mediatek.inc (172.21.101.129) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Wed, 17 Apr 2019 18:45:28 +0800 Received: from mtkslt306.mediatek.inc (10.21.14.136) by mtkcas07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Wed, 17 Apr 2019 18:45:27 +0800 From: Frederic Chen To: , , , , Subject: [RFC PATCH V1 1/6] dt-bindings: mt8183: Add binding for DIP shared memory Date: Wed, 17 Apr 2019 18:45:06 +0800 Message-ID: <20190417104511.21514-2-frederic.chen@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20190417104511.21514-1-frederic.chen@mediatek.com> References: <20190417104511.21514-1-frederic.chen@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190417_034539_393849_09BB486F X-CRM114-Status: GOOD ( 11.74 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: shik@chromium.org, devicetree@vger.kernel.org, Sean.Cheng@mediatek.com, Rynn.Wu@mediatek.com, srv_heupstream@mediatek.com, holmes.chiou@mediatek.com, suleiman@chromium.org, Jerry-ch.Chen@mediatek.com, jungo.lin@mediatek.com, sj.huang@mediatek.com, yuzhao@chromium.org, linux-mediatek@lists.infradead.org, zwisler@chromium.org, christie.yu@mediatek.com, frederic.chen@mediatek.com, linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org 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 This patch adds the binding for describing the shared memory used to exchange configuration and tuning data between the co-processor and Digital Image Processing (DIP) unit of the camera ISP system on Mediatek SoCs. Signed-off-by: Frederic Chen --- .../mediatek,reserve-memory-dip_smem.txt | 45 +++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 Documentation/devicetree/bindings/reserved-memory/mediatek,reserve-memory-dip_smem.txt diff --git a/Documentation/devicetree/bindings/reserved-memory/mediatek,reserve-memory-dip_smem.txt b/Documentation/devicetree/bindings/reserved-memory/mediatek,reserve-memory-dip_smem.txt new file mode 100644 index 000000000000..64c001b476b9 --- /dev/null +++ b/Documentation/devicetree/bindings/reserved-memory/mediatek,reserve-memory-dip_smem.txt @@ -0,0 +1,45 @@ +Mediatek DIP Shared Memory binding + +This binding describes the shared memory, which serves the purpose of +describing the shared memory region used to exchange data between Digital +Image Processing (DIP) and co-processor in Mediatek SoCs. + +The co-processor doesn't have the iommu so we need to use the physical +address to access the shared buffer in the firmware. + +The Digital Image Processing (DIP) can access memory through mt8183 IOMMU so +it can use dma address to access the memory region. +(See iommu/mediatek,iommu.txt for the detailed description of Mediatek IOMMU) + + +Required properties: + +- compatible: must be "mediatek,reserve-memory-dip_smem" + +- reg: required for static allocation (see reserved-memory.txt for + the detailed usage) + +- alloc-range: required for dynamic allocation. The range must + between 0x00000400 and 0x100000000 due to the co-processer's + addressing limitation + +- size: required for dynamic allocation. The unit is bytes. + If you want to enable the full feature of Digital Processing Unit, + you need 20 MB at least. + + +Example: + +The following example shows the DIP shared memory setup for MT8183. + + reserved-memory { + #address-cells = <2>; + #size-cells = <2>; + ranges; + reserve-memory-dip_smem { + compatible = "mediatek,reserve-memory-dip_smem"; + size = <0 0x1400000>; + alignment = <0 0x1000>; + alloc-ranges = <0 0x40000000 0 0x50000000>; + }; + };