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 1F083C433EF for ; Mon, 13 Dec 2021 13:50:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238006AbhLMNuw (ORCPT ); Mon, 13 Dec 2021 08:50:52 -0500 Received: from esa.microchip.iphmx.com ([68.232.154.123]:48912 "EHLO esa.microchip.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229779AbhLMNur (ORCPT ); Mon, 13 Dec 2021 08:50:47 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1639403447; x=1670939447; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Mr8OraDWlXzhhixF2aIaP6ECNIESLZAMBR788P3PA+8=; b=nCU00w3SDr3Lwn2aukyrTANmUylH+ajxrEYmxsfldagJXKVhFmx9sn5S cVJOX3JJ1wJ2JQtCse58m+VThbwzc+x+ndexSmLhxnQCYiS+TIIYsw49R ZUfCdPYi5lNedr6BsKEkSv0dTj89k1JkvA3O8naCUzZAsVVH3FTfdFDPU WUMtRA3n+sOW9x/Ibm1e9TIwyi0RNuckJlGO4cSWM75bj7KZtyRy8v77W tfNy0hz/jOR3MXzT2cF0jpx5xbtM+uM4Z7lw6Iqkp0ecy8IVZ4lRBwMhi zJxqDEg4woXEVjluigrOpuT/9ZokDM9dsOke8b2T/4r18JqC5gTI3cKWD Q==; IronPort-SDR: ilnTfrLGjdTpHvNT/2oVQFqecg6n0aSf2fM37PP6p0zBCoD8xSEJ2UFSF2JadzxuMvPsfKURVn dhMY1NF363c+U9rdjJpnCohUhB8xOI5PdxKcTlTCPTFgxbausMyF5OQDIqDFCF6mCgFMNuix7r D9jrIUj3zv63gZQ58DygX51LsMiHeG5cMd0jhWyWiMoDH537vmfkPEi2MxBRJscKXGZCr6/mi5 ZOg+4r5VpMVe+M04/t3mtgzn6Q2chGvSZghs8gPxZPdIFMlscfEtX7bsF1tWmgHCx60/NgzbJi 3kWcL2gCSZKFNj6PL/zJgH+n X-IronPort-AV: E=Sophos;i="5.88,202,1635231600"; d="scan'208";a="79361383" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa6.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 13 Dec 2021 06:50:46 -0700 Received: from chn-vm-ex01.mchp-main.com (10.10.85.143) by chn-vm-ex03.mchp-main.com (10.10.85.151) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.17; Mon, 13 Dec 2021 06:50:46 -0700 Received: from ROB-ULT-M18282.microchip.com (10.10.115.15) by chn-vm-ex01.mchp-main.com (10.10.85.143) with Microsoft SMTP Server id 15.1.2375.17 via Frontend Transport; Mon, 13 Dec 2021 06:50:22 -0700 From: Eugen Hristev To: , , , , CC: , , , , "Eugen Hristev" Subject: [PATCH v3 02/23] dt-bindings: media: atmel: csi2dc: add bindings for microchip csi2dc Date: Mon, 13 Dec 2021 15:49:19 +0200 Message-ID: <20211213134940.324266-3-eugen.hristev@microchip.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211213134940.324266-1-eugen.hristev@microchip.com> References: <20211213134940.324266-1-eugen.hristev@microchip.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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. CSI2DC can also act as a parallel bypass from a parallel sensor to the image sensor controller/interface. Signed-off-by: Eugen Hristev --- Changes in v3: - Changed to port base as suggested by Rob - Added properties from video-interfaces which are being used by the csi2dc - added mention to the parallel port type as input - did some rephrasing and rewording 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 | 197 ++++++++++++++++++ 1 file changed, 197 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..e8544fb2d034 --- /dev/null +++ b/Documentation/devicetree/bindings/media/microchip,csi2dc.yaml @@ -0,0 +1,197 @@ +# 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 either from an + IDI interface or from a parallel bus interface. + It filters IDI packets based on their data type and virtual channel + identifier, then converts the byte stream to a pixel stream into a cross + clock domain towards a parallel interface that can be read by a sensor + controller. + IDI interface is Synopsys proprietary. + CSI2DC can act a simple bypass bridge if the incoming data is coming from + a parallel interface. + + CSI2DC provides two pipes, one video pipe and one data pipe. Video pipe + is connected at the output 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 either Synopsys + 32-bit IDI interface or a parallel interface. + + 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. + For data pipe to be available, a dma controller and a dma channel must be + referenced. + +properties: + compatible: + const: microchip,sama7g5-csi2dc + + reg: + maxItems: 1 + + clocks: + minItems: 2 + 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: + $ref: /schemas/graph.yaml#/$defs/port-base + description: + Input port node, single endpoint describing the input port. + + properties: + endpoint: + $ref: video-interfaces.yaml# + unevaluatedProperties: false + description: Endpoint connected to input device + + properties: + bus-type: + enum: [4, 5, 6] + default: 4 + + bus-width: + enum: [8, 9, 10, 11, 12, 13, 14] + default: 14 + + clock-noncontinuous: + type: boolean + description: + Presence of this boolean property decides whether clock is + continuous or noncontinuous. + + remote-endpoint: true + + port@1: + $ref: /schemas/graph.yaml#/$defs/port-base + description: + Output port node, single endpoint describing the output port. + + properties: + endpoint: + unevaluatedProperties: false + $ref: video-interfaces.yaml# + description: Endpoint connected to output device + + properties: + bus-type: + enum: [5, 6] + default: 5 + + bus-width: + enum: [8, 9, 10, 11, 12, 13, 14] + default: 14 + + remote-endpoint: true + + required: + - port@0 + - port@1 + +additionalProperties: false + +required: + - compatible + - reg + - clocks + - clock-names + - ports + +examples: + # Example for connecting to a parallel sensor controller block (video pipe) + # and the input is received from Synopsys IDI interface + - | + 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 */ + bus-type = <4>; /* MIPI CSI2 D-PHY */ + 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 + # and the input is received from Synopsys IDI interface + - | + #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>; + }; + }; + + port@1 { + reg = <1>; + }; + }; + }; + +... -- 2.25.1