From patchwork Fri Jul 3 07:44:13 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eugen Hristev X-Patchwork-Id: 11641047 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E053F14E3 for ; Fri, 3 Jul 2020 07:46:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C0A8520B80 for ; Fri, 3 Jul 2020 07:46:51 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=microchip.com header.i=@microchip.com header.b="Bj6LKJtW" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726082AbgGCHqr (ORCPT ); Fri, 3 Jul 2020 03:46:47 -0400 Received: from esa1.microchip.iphmx.com ([68.232.147.91]:46417 "EHLO esa1.microchip.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725779AbgGCHqp (ORCPT ); Fri, 3 Jul 2020 03:46:45 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1593762405; x=1625298405; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=cb8Vs4fktK2VzQoBziAjRHIS6+ohk/JJyzWVMxngD+k=; b=Bj6LKJtWRFazfCB1cKFFp2iDfrtmeGKVBMGU0YB+2RLNG6lus2An09MB 65+RPQ09J/PfGP9rPafbIdELkpqjbS/Usavzr/9UEKlZsjYXAc/CUieRL CuDi9YRLicHdA9qetSXLDXR7iQTuvXCtyKu9mjeq4d4XYeHWPpsw5prZg PXvpFCjwS70y56nwSR2A4QtBCA/lEk74dA+UVgUyTU587yoeqVETw2FPb BlQUXi0LrSHgzcYVQAVpLyfpfByZRrTzk0QkPMyyTJL4kKSq3YhbfVjBR 6URHhC4dx0N3W8iVkFbRztbnhw+YHL2vGZOGU3x0aGcPmp25EiYJ5KXJL A==; IronPort-SDR: F+OTQJkOcALkc56/1F0ce+Mj4oEHahp/IP6nD1lGxlzSxo8Tf7zP/IwSR2u3LPQMXRPAPZJj4o E+QL2z/A2o8vIsgbD8viXhgKZMPmscURXX7VKGdVhSu/AspanlJqwdyXx9ogF9yVjC4/nkyyXc 9II+gsQ+YA3ABXQkCEYUaFcp52Pc7mNRvDM52EfaiISSVUcMK3+kYcpUvX0tpAeRuoYwSbxK5s LuyMODFAYxVFmbVrJtddlUC4VjJZfszh+yQiI9BA1V+SXd5pOqTeGx9+l+9qBNGIzMnxJHvzSs Z/Q= X-IronPort-AV: E=Sophos;i="5.75,307,1589266800"; d="scan'208";a="86113067" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa1.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 03 Jul 2020 00:46:43 -0700 Received: from chn-vm-ex02.mchp-main.com (10.10.85.144) 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 15.1.1979.3; Fri, 3 Jul 2020 00:46:43 -0700 Received: from ROB-ULT-M18282.microchip.com (10.10.115.15) by chn-vm-ex02.mchp-main.com (10.10.85.144) with Microsoft SMTP Server id 15.1.1979.3 via Frontend Transport; Fri, 3 Jul 2020 00:46:19 -0700 From: Eugen Hristev To: , , , , , , CC: Eugen Hristev Subject: [PATCH v2 1/4] dt-bindings: media: csi2dc: add bindings for microchip csi2dc Date: Fri, 3 Jul 2020 10:44:13 +0300 Message-ID: <20200703074416.55272-2-eugen.hristev@microchip.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200703074416.55272-1-eugen.hristev@microchip.com> References: <20200703074416.55272-1-eugen.hristev@microchip.com> MIME-Version: 1.0 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@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. Signed-off-by: Eugen Hristev --- Changes in v2: - fixed warnings reported by dt_binding_check .../bindings/media/microchip,csi2dc.yaml | 185 ++++++++++++++++++ 1 file changed, 185 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..b7c46f7ad2a4 --- /dev/null +++ b/Documentation/devicetree/bindings/media/microchip,csi2dc.yaml @@ -0,0 +1,185 @@ +# SPDX-License-Identifier: GPL-2.0-only +%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. + + 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 source pad with Synopsys 32-bit + IDI interface. The connected endpoint must be a IDI interface compatible + device (like Synopsys CSI2HOST) , that can provide 32-bit IDI interface + connection as sink pad. + It should contain one 'port' child node with one child 'endpoint' node. + This node should always have the 'reg' property as 0, being the first child + node. + For media entity and endpoints please refer to the bindings defined in + Documentation/devicetree/bindings/media/video-interfaces.txt. + For Synopsys IDI interface please refer to + Documentation/devicetree/bindings/media/snps,dw-csi-plat.txt + + CSI2DC supports one 'port' node as sink pad with parallel interface. This is + called video pipe. + The reg property inside this 'port' node must have the 'reg' property as 1, + being the second child node. + This node must have one 'endpoint', and this 'endpoint' is related to the + virtual channel identifier. + The 'reg' property inside this 'endpoint' represents the CSI2 virtual channel + identifier. + This 'endpoint' can then be used as a source pad for another controller + (next in pipeline). + Please refer to the bindings defined in + Documentation/devicetree/bindings/media/video-interfaces.txt. + + 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. + + CSI2DC also supports direct access to the data through AHB, via DMA channel, + called data pipe. + Because of this, the sink 'port' child node (second) is not mandatory. + If the sink 'port' child node is missing, only data pipe is available. + +properties: + compatible: + const: microchip,sama7g5-csi2dc + + reg: + description: + Physical base address and length of the registers set for the device. + maxItems: 1 + + clocks: + maxItems: 2 + + clock-names: + items: + - const: pclk + - const: scck + + microchip,clk-gated: + type: boolean + description: + If present, indicates that the clock is gated. + Otherwise, the clock is free-running. + + microchip,inter-line-delay: + allOf: + - $ref: /schemas/types.yaml#/definitions/uint32 + - minimum: 1 + - maximum: 16 + default: 16 + description: + Indicates how many clock cycles should be introduced between each line. + + port@0: + type: object + description: + Input port node, single endpoint describing the input pad. + + properties: + reg: + const: 0 + + endpoint: + type: object + + properties: + remote-endpoint: true + + required: + - remote-endpoint + + additionalProperties: false + + additionalProperties: false + + port@1: + type: object + description: + Output port node, single endpoint, describing the output pad. + + properties: + '#address-cells': + const: 1 + + '#size-cells': + const: 0 + + reg: + const: 1 + + patternProperties: + "^endpoint@[0-9a-f]$": + type: object + + properties: + reg: + enum: [0, 1, 2, 3] + description: virtual channel for the endpoint + + remote-endpoint: true + + required: + - remote-endpoint + - reg + + additionalProperties: false + + additionalProperties: false + +required: + - compatible + - reg + - clocks + - clock-names + - port@0 + +examples: + - | + csi2dc@e1404000 { + compatible = "microchip,sama7g5-csi2dc"; + #address-cells = <1>; + #size-cells = <0>; + reg = <0xe1404000 0x500>; + clocks = <&pclk>, <&scck>; + clock-names = "pclk", "scck"; + + port@0 { + reg = <0>; /* must be 0, first child port */ + csi2dc_in: endpoint { /* input from IDI interface */ + remote-endpoint = <&csi2host_out>; + }; + }; + + port@1 { + #address-cells = <1>; + #size-cells = <0>; + reg = <1>; /* must be 1, second child port */ + csi2dc_out: endpoint@2 { + reg = <2>; /* virtual channel identifier */ + remote-endpoint = <&xisc_in>; /* output to sensor controller */ + }; + }; + }; + +...