From patchwork Thu Apr 19 15:45:34 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul Kocialkowski X-Patchwork-Id: 10351129 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id BB40E6023A for ; Thu, 19 Apr 2018 15:52:03 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A9CF22893E for ; Thu, 19 Apr 2018 15:52:03 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9E7A928975; Thu, 19 Apr 2018 15:52:03 +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=-2.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI 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 2CEEB2893E for ; Thu, 19 Apr 2018 15:52:03 +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: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=kqO5hFfkfdlsHXDhCmqMBjzUo1KdqVde9nHfvDjw1Eo=; b=CfPOoE8rzw+iMN78h291LD7pvx NXwuGRp20sKabtnvPcL1/uTIe56sQeicp3M6wzEEpegNNMfVRY19DR36UGzk8wNRim/dEPhQU9YeE Cfsv3l7+HCGw+KuBAE48l1heg1dC0QNXIQAY8gP3CmbZVrrSyfHphzcvlVmnAbCdMyMAZtcqgM2/9 3f5I69KFPVpqtsYzhbA2IQpokKupGmfg7ab2LAabw5W98GMzbiEww4x6XZNkKR526KBZM5tj6FUQY 2xVcgy8/Z4Txfd7WAVZD5B/WAtd1YG6+9sBUE5d/lU7nFAHGfyC9neR+TURT/+jm8mn5o6He5dgsG 8GZ2LVbg==; 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 1f9Bqh-0003F6-W5; Thu, 19 Apr 2018 15:51:52 +0000 Received: from mail.bootlin.com ([62.4.15.54]) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1f9Bm6-0008TB-U7 for linux-arm-kernel@lists.infradead.org; Thu, 19 Apr 2018 15:47:23 +0000 Received: by mail.bootlin.com (Postfix, from userid 110) id 9EDFC20893; Thu, 19 Apr 2018 17:46:56 +0200 (CEST) Received: from localhost.localdomain (LStLambert-657-1-97-87.w90-63.abo.wanadoo.fr [90.63.216.87]) by mail.bootlin.com (Postfix) with ESMTPSA id 2E91220824; Thu, 19 Apr 2018 17:46:56 +0200 (CEST) From: Paul Kocialkowski To: linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-sunxi@googlegroups.com Subject: [PATCH v2 08/10] dt-bindings: media: Document bindings for the Sunxi-Cedrus VPU driver Date: Thu, 19 Apr 2018 17:45:34 +0200 Message-Id: <20180419154536.17846-4-paul.kocialkowski@bootlin.com> X-Mailer: git-send-email 2.16.3 In-Reply-To: <20180419154124.17512-1-paul.kocialkowski@bootlin.com> References: <20180419154124.17512-1-paul.kocialkowski@bootlin.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180419_084707_357763_52A76D7A X-CRM114-Status: GOOD ( 15.02 ) 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: Mark Rutland , Philipp Zabel , Pawel Osciak , Maxime Ripard , Kyungmin Park , Tomasz Figa , Paul Kocialkowski , Chen-Yu Tsai , Rob Herring , Hans Verkuil , Alexandre Courbot , Sakari Ailus , Mauro Carvalho Chehab , Arnd Bergmann , Marek Szyprowski 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 This adds a device-tree binding document that specifies the properties used by the Sunxi-Cedurs VPU driver, as well as examples. Signed-off-by: Paul Kocialkowski Reviewed-by: Rob Herring --- .../devicetree/bindings/media/sunxi-cedrus.txt | 50 ++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 Documentation/devicetree/bindings/media/sunxi-cedrus.txt diff --git a/Documentation/devicetree/bindings/media/sunxi-cedrus.txt b/Documentation/devicetree/bindings/media/sunxi-cedrus.txt new file mode 100644 index 000000000000..71ad3f9c3352 --- /dev/null +++ b/Documentation/devicetree/bindings/media/sunxi-cedrus.txt @@ -0,0 +1,50 @@ +Device-tree bindings for the VPU found in Allwinner SoCs, referred to as the +Video Engine (VE) in Allwinner literature. + +The VPU can only access the first 256 MiB of DRAM, that are DMA-mapped starting +from the DRAM base. This requires specific memory allocation and handling. + +Required properties: +- compatible : "allwinner,sun4i-a10-video-engine"; +- memory-region : DMA pool for buffers allocation; +- clocks : list of clock specifiers, corresponding to entries in + the clock-names property; +- clock-names : should contain "ahb", "mod" and "ram" entries; +- assigned-clocks : list of clocks assigned to the VE; +- assigned-clocks-rates : list of clock rates for the clocks assigned to the VE; +- resets : phandle for reset; +- interrupts : should contain VE interrupt number; +- reg : should contain register base and length of VE. + +Example: + +reserved-memory { + #address-cells = <1>; + #size-cells = <1>; + ranges; + + /* Address must be kept in the lower 256 MiBs of DRAM for VE. */ + ve_memory: cma@4a000000 { + compatible = "shared-dma-pool"; + reg = <0x4a000000 0x6000000>; + no-map; + linux,cma-default; + }; +}; + +video-engine@1c0e000 { + compatible = "allwinner,sun4i-a10-video-engine"; + reg = <0x01c0e000 0x1000>; + memory-region = <&ve_memory>; + + clocks = <&ccu CLK_AHB_VE>, <&ccu CLK_VE>, + <&ccu CLK_DRAM_VE>; + clock-names = "ahb", "mod", "ram"; + + assigned-clocks = <&ccu CLK_VE>; + assigned-clock-rates = <320000000>; + + resets = <&ccu RST_VE>; + + interrupts = ; +};