From patchwork Fri Oct 20 07:49:22 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Boris Brezillon X-Patchwork-Id: 828492 Return-Path: X-Original-To: incoming-dt@patchwork.ozlabs.org Delivered-To: patchwork-incoming-dt@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=devicetree-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3yJHxy3rqNz9t6J for ; Fri, 20 Oct 2017 18:49:42 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752490AbdJTHtk (ORCPT ); Fri, 20 Oct 2017 03:49:40 -0400 Received: from mail.free-electrons.com ([62.4.15.54]:40612 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752221AbdJTHti (ORCPT ); Fri, 20 Oct 2017 03:49:38 -0400 Received: by mail.free-electrons.com (Postfix, from userid 110) id 6A635203A8; Fri, 20 Oct 2017 09:49:35 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on mail.free-electrons.com X-Spam-Level: X-Spam-Status: No, score=-1.0 required=5.0 tests=ALL_TRUSTED,SHORTCIRCUIT shortcircuit=ham autolearn=disabled version=3.4.0 Received: from localhost.localdomain (LStLambert-657-1-97-87.w90-63.abo.wanadoo.fr [90.63.216.87]) by mail.free-electrons.com (Postfix) with ESMTPSA id E147E203A9; Fri, 20 Oct 2017 09:49:24 +0200 (CEST) From: Boris Brezillon To: Archit Taneja , David Airlie , Daniel Vetter , dri-devel@lists.freedesktop.org Cc: Richard Sproul , Simon Hatliff , Maxime Ripard , Thomas Petazzoni , Cyprian Wronka , Alan Douglas , "Menon, Nishanth" , Tomi Valkeinen , Jyri Sarha , Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , devicetree@vger.kernel.org, Andrzej Hajda , Eric Anholt , Boris Brezillon Subject: [PATCH v4 2/2] dt-bindings: drm/bridge: Document Cadence DSI bridge bindings Date: Fri, 20 Oct 2017 09:49:22 +0200 Message-Id: <20171020074922.14239-2-boris.brezillon@free-electrons.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20171020074922.14239-1-boris.brezillon@free-electrons.com> References: <20171020074922.14239-1-boris.brezillon@free-electrons.com> Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Document the bindings used for the Cadence DSI bridge. Signed-off-by: Boris Brezillon Acked-by: Rob Herring --- Hi Rob, I dropped your A-b because two important things changed in this version: * the clk names have changed (they are now prefixed with dsi_) * compatible no longer contains the IP version Feel free to add it back. Regards, Boris Changes in v4: - Rename DSI clks (suggested by Tomi) - Drop the IP version in the compatible since it can be extracted from a register (suggested by Andrzej) Changes in v3: - Fix clock names in the example - Document how to represent DSI devices that are controller through an external bus like I2C or SPI Changes in v2: - None --- .../bindings/display/bridge/cdns,dsi.txt | 109 +++++++++++++++++++++ 1 file changed, 109 insertions(+) create mode 100644 Documentation/devicetree/bindings/display/bridge/cdns,dsi.txt diff --git a/Documentation/devicetree/bindings/display/bridge/cdns,dsi.txt b/Documentation/devicetree/bindings/display/bridge/cdns,dsi.txt new file mode 100644 index 000000000000..50bb3189f2ee --- /dev/null +++ b/Documentation/devicetree/bindings/display/bridge/cdns,dsi.txt @@ -0,0 +1,109 @@ +Cadence DSI bridge +================== + +The Cadence DSI bridge is a DPI to DSI bridge supporting up to 4 DSI lanes. + +Required properties: +- compatible: should be set to "cdns,dsi". +- reg: physical base address and length of the controller's registers. +- interrupts: interrupt line connected to the DSI bridge. +- clocks: DSI bridge clocks. +- clock-names: must contain "dsi_p_clk" and "dsi_sys_clk". +- phys: phandle link to the MIPI D-PHY controller. +- phy-names: must contain "dphy". +- #address-cells: must be set to 1. +- #size-cells: must be set to 0. + +Required subnodes: +- ports: Ports as described in Documentation/devicetree/bindings/graph.txt. + 2 ports are available: + * port 0: this port is only needed if some of your DSI devices are + controlled through an external bus like I2C or SPI. Can have at + most 4 endpoints. The endpoint number is directly encoding the + DSI virtual channel used by this device. + * port 1: represents the DPI input. + Other ports will be added later to support the new kind of inputs. + +- one subnode per DSI device connected on the DSI bus. Each DSI device should + contain a reg property encoding its virtual channel. + +Example: + + dsi0: dsi@fd0c0000 { + compatible = "cdns,dsi-1.3.1"; + reg = <0x0 0xfd0c0000 0x0 0x1000>; + clocks = <&pclk>, <&sysclk>; + clock-names = "dsi_p_clk", "dsi_sys_clk"; + interrupts = <1>; + phys = <&dphy1>; + phy-names = "dphy"; + #address-cells = <1>; + #size-cells = <0>; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + port@1 { + reg = <1>; + dsi0_dpi_input: endpoint { + remote-endpoint = <&xxx_dpi_output>; + }; + }; + }; + + panel: dsi-dev@0 { + compatible = ""; + reg = <0>; + }; + }; + +or + + dsi0: dsi@fd0c0000 { + compatible = "cdns,dsi"; + reg = <0x0 0xfd0c0000 0x0 0x1000>; + clocks = <&pclk>, <&sysclk>; + clock-names = "sys_p_clk", "dsi_sys_clk"; + interrupts = <1>; + phys = <&dphy1>; + phy-names = "dphy"; + #address-cells = <1>; + #size-cells = <0>; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + port@0 { + reg = <0>; + #address-cells = <1>; + #size-cells = <0>; + + dsi0_output: endpoint@0 { + reg = <0>; + remote-endpoint = <&dsi_panel_input>; + }; + }; + + port@1 { + reg = <1>; + dsi0_dpi_input: endpoint { + remote-endpoint = <&xxx_dpi_output>; + }; + }; + }; + }; + + i2c@xxx { + panel: panel@59 { + compatible = ""; + reg = <0x59>; + + port { + dsi_panel_input: endpoint { + remote-endpoint = <&dsi0_output>; + }; + }; + }; + };