From patchwork Wed May 23 09:31:17 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Rosin X-Patchwork-Id: 10422983 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id B362960327 for ; Thu, 24 May 2018 07:37:27 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9F90D28964 for ; Thu, 24 May 2018 07:37:27 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9410A29197; Thu, 24 May 2018 07:37:27 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAD_ENC_HEADER,BAYES_00, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 3061F28964 for ; Thu, 24 May 2018 07:37:27 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 881356E610; Thu, 24 May 2018 07:36:15 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from EUR01-HE1-obe.outbound.protection.outlook.com (mail-he1eur01on0715.outbound.protection.outlook.com [IPv6:2a01:111:f400:fe1e::715]) by gabe.freedesktop.org (Postfix) with ESMTPS id 104726E429 for ; Wed, 23 May 2018 09:31:45 +0000 (UTC) Received: from orc.pedanet (85.226.244.23) by VI1PR0202MB2782.eurprd02.prod.outlook.com (2603:10a6:800:db::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P256) id 15.20.776.16; Wed, 23 May 2018 09:31:41 +0000 From: Peter Rosin To: linux-kernel@vger.kernel.org Subject: [PATCH v5 2/7] dt-bindings: display: atmel: optional video-interface of endpoints Date: Wed, 23 May 2018 11:31:17 +0200 Message-Id: <20180523093122.27859-3-peda@axentia.se> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20180523093122.27859-1-peda@axentia.se> References: <20180523093122.27859-1-peda@axentia.se> MIME-Version: 1.0 X-Originating-IP: [85.226.244.23] X-ClientProxiedBy: HE1PR0102CA0046.eurprd01.prod.exchangelabs.com (2603:10a6:7:7d::23) To VI1PR0202MB2782.eurprd02.prod.outlook.com (2603:10a6:800:db::7) X-MS-PublicTrafficType: Email X-Microsoft-Antispam: UriScan:; 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This can happen e.g. if not all RGB pins are routed on the PCB; the driver has no way of knowing this, and needs to be told explicitly. This is critical for the devices that have the "conflicting output formats" issue (SAM9N12, SAM9X5, SAMA5D3), since the most significant RGB bits move around depending on the selected output mode. For devices that do not have the "conflicting output formats" issue (SAMA5D2, SAMA5D4), this is completely irrelevant. Acked-by: Boris Brezillon Reviewed-by: Rob Herring Signed-off-by: Peter Rosin --- .../devicetree/bindings/display/atmel/hlcdc-dc.txt | 26 ++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/Documentation/devicetree/bindings/display/atmel/hlcdc-dc.txt b/Documentation/devicetree/bindings/display/atmel/hlcdc-dc.txt index 82f2acb3d374..9de434a8f523 100644 --- a/Documentation/devicetree/bindings/display/atmel/hlcdc-dc.txt +++ b/Documentation/devicetree/bindings/display/atmel/hlcdc-dc.txt @@ -15,6 +15,14 @@ Required children nodes: to external devices using the OF graph reprensentation (see ../graph.txt). At least one port node is required. +Optional properties in grandchild nodes: + Any endpoint grandchild node may specify a desired video interface + according to ../../media/video-interfaces.txt, specifically + - bus-type: must be <0>. + - bus-width: recognized values are <12>, <16>, <18> and <24>, and + override any output mode selection heuristic, forcing "rgb444", + "rgb565", "rgb666" and "rgb888" respectively. + Example: hlcdc: hlcdc@f0030000 { @@ -50,3 +58,21 @@ Example: #pwm-cells = <3>; }; }; + + +Example 2: With a video interface override to force rgb565; as above +but with these changes/additions: + + &hlcdc { + hlcdc-display-controller { + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_lcd_base &pinctrl_lcd_rgb565>; + + port@0 { + hlcdc_panel_output: endpoint@0 { + bus-type = <0>; + bus-width = <16>; + }; + }; + }; + };