From patchwork Wed Jul 25 10:02:51 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul Kocialkowski X-Patchwork-Id: 10543811 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 E51931805 for ; Wed, 25 Jul 2018 10:05:20 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D007929B3E for ; Wed, 25 Jul 2018 10:05:20 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C3A4E29B59; Wed, 25 Jul 2018 10:05:20 +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=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 62E6729B3E for ; Wed, 25 Jul 2018 10:05:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728840AbeGYLPd (ORCPT ); Wed, 25 Jul 2018 07:15:33 -0400 Received: from mail.bootlin.com ([62.4.15.54]:57813 "EHLO mail.bootlin.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728699AbeGYLPd (ORCPT ); Wed, 25 Jul 2018 07:15:33 -0400 Received: by mail.bootlin.com (Postfix, from userid 110) id 422A220798; Wed, 25 Jul 2018 12:04:32 +0200 (CEST) Received: from localhost.localdomain (AAubervilliers-681-1-78-122.w90-88.abo.wanadoo.fr [90.88.20.122]) by mail.bootlin.com (Postfix) with ESMTPSA id BC9D8207AB; Wed, 25 Jul 2018 12:04:21 +0200 (CEST) From: Paul Kocialkowski To: linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devel@driverdev.osuosl.org Cc: Mauro Carvalho Chehab , Rob Herring , Mark Rutland , Maxime Ripard , Chen-Yu Tsai , Greg Kroah-Hartman , Paul Kocialkowski , Thomas Petazzoni , linux-sunxi@googlegroups.com, Hugues Fruchet , Randy Li , Hans Verkuil , Ezequiel Garcia , Tomasz Figa , Alexandre Courbot , Philipp Zabel , Laurent Pinchart , Sakari Ailus Subject: [PATCH v6 3/8] dt-bindings: media: Document bindings for the Cedrus VPU driver Date: Wed, 25 Jul 2018 12:02:51 +0200 Message-Id: <20180725100256.22833-4-paul.kocialkowski@bootlin.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20180725100256.22833-1-paul.kocialkowski@bootlin.com> References: <20180725100256.22833-1-paul.kocialkowski@bootlin.com> Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This adds a device-tree binding document that specifies the properties used by the Cedurs VPU driver, as well as examples. Signed-off-by: Paul Kocialkowski Reviewed-by: Rob Herring --- .../devicetree/bindings/media/cedrus.txt | 54 +++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 Documentation/devicetree/bindings/media/cedrus.txt diff --git a/Documentation/devicetree/bindings/media/cedrus.txt b/Documentation/devicetree/bindings/media/cedrus.txt new file mode 100644 index 000000000000..a089a0c1ff05 --- /dev/null +++ b/Documentation/devicetree/bindings/media/cedrus.txt @@ -0,0 +1,54 @@ +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 : must be one of the following compatibles: + - "allwinner,sun4i-a10-video-engine" + - "allwinner,sun5i-a13-video-engine" + - "allwinner,sun7i-a20-video-engine" + - "allwinner,sun8i-a33-video-engine" + - "allwinner,sun8i-h3-video-engine" +- reg : register base and length of VE; +- clocks : list of clock specifiers, corresponding to entries in + the clock-names property; +- clock-names : should contain "ahb", "mod" and "ram" entries; +- resets : phandle for reset; +- interrupts : VE interrupt number; +- allwinner,sram : SRAM region to use with the VE. + +Optional properties: +- memory-region : CMA pool to use for buffers allocation instead of the + default CMA pool. + +Example: + +reserved-memory { + #address-cells = <1>; + #size-cells = <1>; + ranges; + + /* Address must be kept in the lower 256 MiBs of DRAM for VE. */ + cma_pool: cma@4a000000 { + compatible = "shared-dma-pool"; + size = <0x6000000>; + alloc-ranges = <0x4a000000 0x6000000>; + reusable; + linux,cma-default; + }; +}; + +video-codec@1c0e000 { + compatible = "allwinner,sun7i-a20-video-engine"; + reg = <0x01c0e000 0x1000>; + + clocks = <&ccu CLK_AHB_VE>, <&ccu CLK_VE>, + <&ccu CLK_DRAM_VE>; + clock-names = "ahb", "mod", "ram"; + + resets = <&ccu RST_VE>; + interrupts = ; + allwinner,sram = <&ve_sram 1>; +};