From patchwork Tue Feb 5 06:42:40 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Frederic Chen X-Patchwork-Id: 10796913 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 9E9501669 for ; Tue, 5 Feb 2019 06:43:52 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 892C828895 for ; Tue, 5 Feb 2019 06:43:52 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7757A28BBA; Tue, 5 Feb 2019 06:43:52 +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 2CD1C28895 for ; Tue, 5 Feb 2019 06:43:52 +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=xVZX71y80mwTfb97kBuTdLdl0NLWUBQZ52M2GPzS2pY=; b=aqtW6L91sLXzLF HI75BfCMrRKH1Ilf1zbmqUHyA5SYiZUikbw2qN1Q37SDV0s+1vM8k/O+WluL/VkKqZEh4ChKTpVb5 8HgPo/h7tcqS0MFMKLA9joClLSZ622UduBbOJxPKlPw01CPLGnkymHaksWwqqsgTvj+2bgYJNUaXQ W9mhZGAh+MUroz/prnZ5+Qix7g6aurouioZlWeKtna74PMnj1hB5UEBW0diS9uSLzkHgUaRfx8vI7 oj2DT7ycqH+3uo4cKzo+7TzHK/rtE67U0MpycfZT3zKWlv3jK1QVdsHKnKXfu7Pb5H1+aZB+GBnAD 6pVF2TPq+aTswPj6ZvKA==; 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 1gquSU-0004Hs-Lw; Tue, 05 Feb 2019 06:43:50 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gquSR-0004HV-Ij; Tue, 05 Feb 2019 06:43:49 +0000 X-UUID: a0d85b6a001b403aa14aba131eda0be0-20190204 X-UUID: a0d85b6a001b403aa14aba131eda0be0-20190204 Received: from mtkcas67.mediatek.inc [(172.29.193.45)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 510092; Mon, 04 Feb 2019 22:43:27 -0800 Received: from mtkmbs03n2.mediatek.inc (172.21.101.182) by MTKMBS62N2.mediatek.inc (172.29.193.42) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Mon, 4 Feb 2019 22:43:25 -0800 Received: from mtkcas09.mediatek.inc (172.21.101.178) by mtkmbs03n2.mediatek.inc (172.21.101.182) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Tue, 5 Feb 2019 14:43:16 +0800 Received: from mtkslt306.mediatek.inc (10.21.14.136) by mtkcas09.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Tue, 5 Feb 2019 14:43:16 +0800 From: Frederic Chen To: , , , , Subject: [RFC PATCH V0 1/7] [media] dt-bindings: mt8183: Add binding for ISP Pass 1 shared memory Date: Tue, 5 Feb 2019 14:42:40 +0800 Message-ID: <1549348966-14451-2-git-send-email-frederic.chen@mediatek.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1549348966-14451-1-git-send-email-frederic.chen@mediatek.com> References: <1549348966-14451-1-git-send-email-frederic.chen@mediatek.com> MIME-Version: 1.0 X-TM-SNTS-SMTP: 71D25D377E8559684CD0A7C4FAE049DD288B7706DB62CB8DF3F5F8E9012CD7052000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190204_224347_628542_B9C9D5C1 X-CRM114-Status: GOOD ( 11.82 ) 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: Sean.Cheng@mediatek.com, Rynn.Wu@mediatek.com, srv_heupstream@mediatek.com, holmes.chiou@mediatek.com, Jerry-ch.Chen@mediatek.com, jungo.lin@mediatek.com, sj.huang@mediatek.com, yuzhao@chromium.org, christie.yu@mediatek.com, zwisler@chromium.org, linux-mediatek@lists.infradead.org, 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 Pass 1 (P1) unit of the camera ISP system on Mediatek SoCs. Signed-off-by: Frederic Chen --- .../mediatek,reserve-memory-cam_smem.txt | 44 ++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 Documentation/devicetree/bindings/reserved-memory/mediatek,reserve-memory-cam_smem.txt diff --git a/Documentation/devicetree/bindings/reserved-memory/mediatek,reserve-memory-cam_smem.txt b/Documentation/devicetree/bindings/reserved-memory/mediatek,reserve-memory-cam_smem.txt new file mode 100644 index 0000000..05c1bf1 --- /dev/null +++ b/Documentation/devicetree/bindings/reserved-memory/mediatek,reserve-memory-cam_smem.txt @@ -0,0 +1,44 @@ +Mediatek ISP Pass 1 Shared Memory binding + +This binding describes the shared memory, which serves the purpose of +describing the shared memory region used to exchange data between Pass 1 +unit of Image Signal Processor (ISP) and the 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 Pass 1 unit of ISP can access memory through the iommu so it +uses the 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-cam_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. + + +Example: + +The following example shows the ISP Pass1 shared memory setup for MT8183. + + reserved-memory { + #address-cells = <2>; + #size-cells = <2>; + ranges; + reserve-memory-cam_smem { + compatible = "mediatek,reserve-memory-cam_smem"; + size = <0 0x1400000>; + alignment = <0 0x1000>; + alloc-ranges = <0 0x40000000 0 0x50000000>; + }; + };