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Fri, 3 Aug 2018 08:07:15 -0400 Received: from mail-eopbgr40115.outbound.protection.outlook.com ([40.107.4.115]:63945 "EHLO EUR03-DB5-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1732233AbeHCMHP (ORCPT ); Fri, 3 Aug 2018 08:07:15 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=axentia.se; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=TK2uH/oD7Xmy3AEwf4ATIolHvmjpMTP88aHim6p1xbI=; b=cnmH0Tbe7ckoTRBFhU7iMYts5q8jIlbTpE/8zWBDwkyo0zAasHsv+r0KfmSyBpE0r03lT0a/xYINj3uFwm2y9YKL7HBISUtwci9IohQ1Qg8icZRrxJE0ryet7Vj6H8I02KHcd/so/0KGpeFFdoOJI82XUZaQ16qoo81gxQhoHAY= Authentication-Results: spf=none (sender IP is ) smtp.mailfrom=peda@axentia.se; Received: from orc.pedanet (85.226.244.23) by DB6PR0201MB2456.eurprd02.prod.outlook.com (2603:10a6:4:35::8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.995.21; Fri, 3 Aug 2018 10:11:32 +0000 From: Peter Rosin To: linux-kernel@vger.kernel.org Cc: Peter Rosin , Boris Brezillon , David Airlie , Rob Herring , Mark Rutland , Nicolas Ferre , Alexandre Belloni , Laurent Pinchart , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Jyri Sarha , Daniel Vetter , Andrzej Hajda , Russell King - ARM Linux , Jacopo Mondi , Sakari Ailus Subject: [PATCH v6 0/3] drm/atmel-hlcdc: bus-width override support Date: Fri, 3 Aug 2018 12:11:21 +0200 Message-Id: <20180803101124.4622-1-peda@axentia.se> X-Mailer: git-send-email 2.11.0 MIME-Version: 1.0 X-Originating-IP: [85.226.244.23] X-ClientProxiedBy: AM6PR0202CA0003.eurprd02.prod.outlook.com (2603:10a6:209:15::16) To DB6PR0201MB2456.eurprd02.prod.outlook.com (2603:10a6:4:35::8) X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 4dd199e0-1b78-4b49-5ae9-08d5f9297d47 X-Microsoft-Antispam: BCL:0; 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The background for these patches is that our PCB interface between the SAMA5D3 and the ds90c185 lvds encoder is only using 16 bits, and this has to be described somewhere, or the atmel-hlcdc driver have no chance of selecting the correct output mode. Since we have similar problems with a tda19988 HDMI encoder I added patches to override the atmel-hlcdc output format via DT properties compatible with the media video-interface binding and things start to play together. There is still an open question regardning the binding in patch 2/3, where Laurent wondered about plans Sakari might have for explicit bus types for parallel buses. See https://lkml.org/lkml/2018/8/3/278 Cheers, Peter Changes since (the shortened) v5 https://lkml.org/lkml/2018/8/3/182 - add reg properties (and #*-cells) to the example in patch 2/3 - prohibit bus-width 0 in the device-tree in patch 3/3 - added reviewed-by from Jacopo to patch 2/3 and 3/3 Peter Rosin (3): dt-bindings: display: bridge: lvds-transmitter: add ti,ds90c185 dt-bindings: display: atmel: optional video-interface of endpoints drm/atmel-hlcdc: support bus-width (12/16/18/24) in endpoint nodes .../devicetree/bindings/display/atmel/hlcdc-dc.txt | 30 ++++++++++ .../bindings/display/bridge/lvds-transmitter.txt | 8 ++- drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c | 70 +++++++++++++++------- drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h | 1 + drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c | 70 +++++++++++++++++++--- 5 files changed, 151 insertions(+), 28 deletions(-)