From patchwork Sat Feb 18 11:17:11 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pin-yen Lin X-Patchwork-Id: 13145538 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 4EFF0C636CC for ; Sat, 18 Feb 2023 11:17:49 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id AE39910E4A0; Sat, 18 Feb 2023 11:17:48 +0000 (UTC) Received: from mail-pf1-x433.google.com (mail-pf1-x433.google.com [IPv6:2607:f8b0:4864:20::433]) by gabe.freedesktop.org (Postfix) with ESMTPS id AFDF710E4A0 for ; Sat, 18 Feb 2023 11:17:45 +0000 (UTC) Received: by mail-pf1-x433.google.com with SMTP id bq11so340713pfb.11 for ; Sat, 18 Feb 2023 03:17:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=MrZswIO3s0BfCLiWcvjWhA4ILZgxpyay+bftO3KZDHg=; b=ba9IojY/CUj+zzZ/UQHSrVd/cwQfpf6fCIPaEsCNLLepX6wnF3HgOqg3YWXfV31SSH Dgpb2oe2njMUAn8gHjEYk3ypaIoyjbybV16Brug2JRVblYSygzOi/VLJB0juzLK3bYkY 4Rbyeuq8O58WHOcm7PAIUhanqDM4bO0ozTQtM= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=MrZswIO3s0BfCLiWcvjWhA4ILZgxpyay+bftO3KZDHg=; b=rUUIIwnkFEDFOhpvfJiqb8CNyu0xLhXyL3scWGenA5FtDlyXqNTF/x6V8FsC89mqn/ EogPSzbWfCJRnYiWX0tkMOlDoqBv6QoSBYtbguKdtPg0+Wk4VoxwxW9ZuPqag8u+5cCP whfzPWEM1BVVBmkQUeZCUpIdx68scDCxR2hUpiBpB8bIQzGeAjMSm/3hpesr/cONiXH1 zac82/X5PKm9O9v89xfRKSUlovUh3+mvc9tqRCZW99JSLryd23dxIOOa4oBx/PdEat14 8x6MycWHyI1xT6acvDSS1NW87qrscj7DGeW/WWeWDKjzN1YnxL8hjJnk8sTfYEdQM9BO XP0Q== X-Gm-Message-State: AO0yUKUBssFvF5QiD6d+v7RkMFE4l+/tdyEKRrnkDPuistAAGqPgxRAV LWh3ToWgMjsteXlLqHI2BsI5lQ== X-Google-Smtp-Source: AK7set/2EtDLkb5CN95kCgHnoYzFvMY65qtuHhNEFZiMAKbzehZIhs0gSwBpIhugJj7RooT5OoFOTQ== X-Received: by 2002:aa7:9402:0:b0:5a8:aae8:1160 with SMTP id x2-20020aa79402000000b005a8aae81160mr3998360pfo.20.1676719065217; Sat, 18 Feb 2023 03:17:45 -0800 (PST) Received: from treapking.tpe.corp.google.com ([2401:fa00:1:10:88dd:be84:8f65:fec2]) by smtp.gmail.com with ESMTPSA id 23-20020aa79157000000b005a8686b72fcsm4457829pfi.75.2023.02.18.03.17.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 18 Feb 2023 03:17:44 -0800 (PST) From: Pin-yen Lin To: Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , David Airlie , Daniel Vetter , Rob Herring , Krzysztof Kozlowski , Benson Leung Subject: [PATCH v3 4/5] dt-bindings: display: bridge: Add GPIO display mux binding Date: Sat, 18 Feb 2023 19:17:11 +0800 Message-Id: <20230218111712.2380225-5-treapking@chromium.org> X-Mailer: git-send-email 2.39.2.637.g21b0678d19-goog In-Reply-To: <20230218111712.2380225-1-treapking@chromium.org> References: <20230218111712.2380225-1-treapking@chromium.org> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: chrome-platform@lists.linux.dev, Nicolas Boichat , Chun-Kuang Hu , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Matthias Brugger , devicetree@vger.kernel.org, linux-mediatek@lists.infradead.org, Pin-yen Lin , Guenter Roeck , linux-arm-kernel@lists.infradead.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Nicolas Boichat Add bindings for Generic GPIO mux driver. Signed-off-by: Nicolas Boichat Signed-off-by: Pin-yen Lin --- Rob mentioned that this series can probably use the common MUX bindings. Those bindings are designed for MUX consumers that requests a certain MUX configuration, while this driver is reading a GPIO pin controlled by the other parts of the system (in our use case, it's the embedded controller firmware). Changes in v3: - Removed ddc-i2c-bus in the bindings Changes in v2: - Referenced existing dt-binding schemas from graph.yaml - Added ddc-i2c-bus into the bindings .../bindings/display/bridge/gpio-mux.yaml | 90 +++++++++++++++++++ 1 file changed, 90 insertions(+) create mode 100644 Documentation/devicetree/bindings/display/bridge/gpio-mux.yaml diff --git a/Documentation/devicetree/bindings/display/bridge/gpio-mux.yaml b/Documentation/devicetree/bindings/display/bridge/gpio-mux.yaml new file mode 100644 index 000000000000..e6b82ea2f45c --- /dev/null +++ b/Documentation/devicetree/bindings/display/bridge/gpio-mux.yaml @@ -0,0 +1,90 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/display/bridge/gpio-mux.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Generic display mux (1 input, 2 outputs) + +maintainers: + - Nicolas Boichat + +description: | + This bindings describes a simple display (e.g. HDMI) mux, that has 1 + input, and 2 outputs. The mux status is controlled by hardware, and + its status is read back using a GPIO. + +properties: + compatible: + const: gpio-display-mux + + detect-gpios: + maxItems: 1 + description: GPIO that indicates the active output + + ports: + $ref: /schemas/graph.yaml#/properties/ports + + properties: + port@0: + $ref: /schemas/graph.yaml#/properties/port + description: | + Video port for input. + + port@1: + $ref: /schemas/graph.yaml#/properties/port + description: | + 2 video ports for output. + The reg value in the endpoints matches the GPIO status: when + GPIO is asserted, endpoint with reg value <1> is selected. + + required: + - port@0 + - port@1 + +required: + - compatible + - detect-gpios + - ports + +unevaluatedProperties: false + +examples: + - | + #include + hdmi_mux: hdmi_mux { + compatible = "gpio-display-mux"; + detect-gpios = <&pio 36 GPIO_ACTIVE_HIGH>; + pinctrl-names = "default"; + pinctrl-0 = <&hdmi_mux_pins>; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + port@0 { /* input */ + reg = <0>; + + hdmi_mux_in: endpoint { + remote-endpoint = <&hdmi0_out>; + }; + }; + + port@1 { /* output */ + reg = <1>; + + #address-cells = <1>; + #size-cells = <0>; + + hdmi_mux_out_anx: endpoint@0 { + reg = <0>; + remote-endpoint = <&dp_bridge_in>; + }; + + hdmi_mux_out_hdmi: endpoint@1 { + reg = <1>; + remote-endpoint = <&hdmi_connector_in>; + }; + }; + }; + };