Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 90A06C433EF for ; Mon, 29 Nov 2021 21:12:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230365AbhK2VPr (ORCPT ); Mon, 29 Nov 2021 16:15:47 -0500 Received: from mail-oi1-f170.google.com ([209.85.167.170]:33514 "EHLO mail-oi1-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230193AbhK2VNq (ORCPT ); Mon, 29 Nov 2021 16:13:46 -0500 Received: by mail-oi1-f170.google.com with SMTP id q25so37153461oiw.0; Mon, 29 Nov 2021 13:10:28 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=PoeOwN/KZpCo4F8TnAlVyatMjO5hr8169dxHm9L/v84=; b=VNBSXTEerTs4IvbKe6PX9lj3ra7ZL+zDxyC8AMcVkvKT5KhCPHay2Ca4W9hL3JZgzW gh6eRrRyNP95tKGdDB78bo/02A8uzySMy+DEYJxLSx7wUGPfOJelfKYC8A9exVrX+9gE H/Kqnv9u1c18pw4KYW9xVxInV9kLYMynINhxn5pIf+HumHG+0S/7ClYax8F1PVf4Qj+j YY3Fj51l5f5KMB56RO2urvtS3gZmeHpQCBYAJSvBDlyQgsh7CC1vc9G5PorPa89mZZK7 9lwuAvgpKtnqbRl4MKQeE7E2RvJz6JrQmiZXeA1DB0WOVXereunK/0lBJfSUoqIA4d8R Q5Ng== X-Gm-Message-State: AOAM533GnoBpWaMLonb0RAZssEDK04KFLBbYNd1RWGJQqqWGFhlm5WYU azKvj2jzBi9lBiOR2KHb7bNYPQSj9w== X-Google-Smtp-Source: ABdhPJySSMQ87/MdZam85kQEIgw9Myl184KLSWupnu14O1Z1MmXA2sGmauqt62BGOYoSSvc50Sdxjw== X-Received: by 2002:a05:6808:14c2:: with SMTP id f2mr467574oiw.154.1638220228230; Mon, 29 Nov 2021 13:10:28 -0800 (PST) Received: from robh.at.kernel.org (66-90-148-213.dyn.grandenetworks.net. [66.90.148.213]) by smtp.gmail.com with ESMTPSA id m12sm2846678ots.59.2021.11.29.13.10.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 29 Nov 2021 13:10:27 -0800 (PST) Received: (nullmailer pid 615090 invoked by uid 1000); Mon, 29 Nov 2021 21:10:26 -0000 Date: Mon, 29 Nov 2021 15:10:26 -0600 From: Rob Herring To: Eugen Hristev Cc: linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, jacopo@jmondi.org, laurent.pinchart@ideasonboard.com, sakari.ailus@iki.fi, nicolas.ferre@microchip.com Subject: Re: [PATCH v2 02/25] dt-bindings: media: atmel: csi2dc: add bindings for microchip csi2dc Message-ID: References: <20211112142509.2230884-1-eugen.hristev@microchip.com> <20211112142509.2230884-3-eugen.hristev@microchip.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20211112142509.2230884-3-eugen.hristev@microchip.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Nov 12, 2021 at 04:24:46PM +0200, Eugen Hristev wrote: > Add bindings documentation for Microchip CSI2 Demultiplexer controller. > > CSI2DC is a demultiplexer from Synopsys IDI interface specification to > parallel interface connection or direct memory access. > > Signed-off-by: Eugen Hristev > --- > Changes in v2: > - changed the endpoint/port references as suggested by Rob > > Changes in this version : > - fixed 'sink' name to be actually source. > - added dma properties and example with dma > > Previous change log: > Changes in v5: > - modified bindings as per Rob Herring review > > Changes in v4: > - Removed property for inter-line-delay and for clock continuous/non-continuous > - Removed virtual channel by reg for second endpoint > > Changes in v3: > - Removed some text from description, as it was explained in the schema > - fixed other things as per Rob's review > - moved some text inside the schema, like the clock description > > Changes in v2: > - fixed warnings reported by dt_binding_check > > .../bindings/media/microchip,csi2dc.yaml | 159 ++++++++++++++++++ > 1 file changed, 159 insertions(+) > create mode 100644 Documentation/devicetree/bindings/media/microchip,csi2dc.yaml > > diff --git a/Documentation/devicetree/bindings/media/microchip,csi2dc.yaml b/Documentation/devicetree/bindings/media/microchip,csi2dc.yaml > new file mode 100644 > index 000000000000..45418c964bf3 > --- /dev/null > +++ b/Documentation/devicetree/bindings/media/microchip,csi2dc.yaml > @@ -0,0 +1,159 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/media/microchip,csi2dc.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Microchip CSI2 Demux Controller (CSI2DC) > + > +maintainers: > + - Eugen Hristev > + > +description: > + CSI2DC - Camera Serial Interface 2 Demux Controller > + > + CSI2DC is a hardware block that receives incoming data from an IDI interface > + and filters packets based on their data type and virtual channel identifier, > + then converts the byte stream into a cross clock domain to a pixel stream > + to a parallel interface that can be read by a sensor controller. > + IDI interface is Synopsys proprietary. > + > + CSI2DC provides two pipes, one video pipe and one data pipe. Video pipe > + is connected to a sensor controller and the data pipe is accessible > + as a DMA slave port to a DMA controller. > + > + CSI2DC supports a single 'port' node as a sink port with Synopsys 32-bit > + IDI interface. The connected endpoint must be a IDI interface compatible > + device , that can provide 32-bit IDI interface connection as source port. > + This port is mandatory. > + > + CSI2DC supports one 'port' node as source port with parallel interface. > + This is called video pipe. > + This port has an 'endpoint' that can be connected to a sink port of another > + controller (next in pipeline). > + > + CSI2DC also supports direct access to the data through AHB, via DMA channel, > + called data pipe. > + Because of this, the source 'port' child node (second) is not mandatory. > + If the source 'port' child node is missing, only data pipe is available. > + For data pipe to be available, a dma controller must be referenced. > + > +properties: > + compatible: > + const: microchip,sama7g5-csi2dc > + > + reg: > + maxItems: 1 > + > + clocks: > + maxItems: 2 > + > + clock-names: > + description: > + CSI2DC must have two clocks to function correctly. One clock is the > + peripheral clock for the inside functionality of the hardware block. > + This is named 'pclk'. The second clock must be the cross domain clock, > + in which CSI2DC will perform clock crossing. This clock must be fed > + by the next controller in pipeline, which usually is a sensor controller. > + Normally this clock should be given by this sensor controller who > + is also a clock source. This clock is named 'scck', sensor controller clock. > + items: > + - const: pclk > + - const: scck > + > + dmas: > + maxItems: 1 > + > + dma-names: > + const: rx > + > + ports: > + $ref: /schemas/graph.yaml#/properties/ports > + > + properties: > + port@0: > + $ref: /schemas/graph.yaml#/properties/port This must be #/$defs/port-base instead of #/properties/port if video-interfaces.yaml is used. > + description: > + Input port node, single endpoint describing the input port. > + > + properties: > + endpoint: > + $ref: video-interfaces.yaml# But what properties from this do you use? It doesn't look like you need this? > + unevaluatedProperties: false > + description: Endpoint connected to input device > + > + port@1: > + $ref: /schemas/graph.yaml#/properties/port > + description: > + Output port node, single endpoint describing the output port. > + > + properties: > + endpoint: > + unevaluatedProperties: false > + $ref: video-interfaces.yaml# > + description: Endpoint connected to output device > + > + required: > + - port@0 > + > +additionalProperties: false > + > +required: > + - compatible > + - reg > + - clocks > + - clock-names > + - ports > + > +examples: > + # Example for connecting to a parallel sensor controller block > + - | > + csi2dc@e1404000 { > + compatible = "microchip,sama7g5-csi2dc"; > + reg = <0xe1404000 0x500>; > + clocks = <&pclk>, <&scck>; > + clock-names = "pclk", "scck"; > + > + ports { > + #address-cells = <1>; > + #size-cells = <0>; > + port@0 { > + reg = <0>; /* must be 0, first child port */ > + csi2dc_in: endpoint { /* input from IDI interface */ > + remote-endpoint = <&csi2host_out>; > + }; > + }; > + > + port@1 { > + reg = <1>; /* must be 1, second child port */ > + csi2dc_out: endpoint { > + remote-endpoint = <&xisc_in>; /* output to sensor controller */ > + }; > + }; > + }; > + }; > + > + # Example for connecting to a DMA master as an AHB slave > + - | > + #include > + csi2dc@e1404000 { > + compatible = "microchip,sama7g5-csi2dc"; > + reg = <0xe1404000 0x500>; > + clocks = <&pclk>, <&scck>; > + clock-names = "pclk", "scck"; > + dmas = <&dma0 AT91_XDMAC_DT_PERID(34)>; > + dma-names = "rx"; > + > + ports { > + #address-cells = <1>; > + #size-cells = <0>; > + port@0 { > + reg = <0>; /* must be 0, first child port */ > + csi2dc_input: endpoint { /* input from IDI interface */ > + remote-endpoint = <&csi2host_out>; > + }; > + }; > + }; > + }; > + > +... > -- > 2.25.1 > >