From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.4 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2036FC1975A for ; Thu, 12 Mar 2020 07:01:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0ECC0206B1 for ; Thu, 12 Mar 2020 07:01:57 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="nL4Hv1FK" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388000AbgCLHB4 (ORCPT ); Thu, 12 Mar 2020 03:01:56 -0400 Received: from lelv0142.ext.ti.com ([198.47.23.249]:35368 "EHLO lelv0142.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387831AbgCLHBz (ORCPT ); Thu, 12 Mar 2020 03:01:55 -0400 Received: from fllv0035.itg.ti.com ([10.64.41.0]) by lelv0142.ext.ti.com (8.15.2/8.15.2) with ESMTP id 02C71TsD089814; Thu, 12 Mar 2020 02:01:29 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1583996489; bh=2DcFuiREd1lLevtuAMxfcFQw8QwTShJd4BPuKAz9Lh0=; h=Subject:To:CC:References:From:Date:In-Reply-To; b=nL4Hv1FKZs/YfiOt8XmC7MZAc+wkXNl8hk7ZXvwXvsGxmXagJd6RhnIu//VFvqN4M zftKyV63MeMCsh91IERuLv4S2K+/wPJlsq6ZXITZIB0qzzSHFSnsuIRHtgEs7NYw3n vvdkDBs130WKzqh06H8UE7NWKw1RWwvdWqsHprw4= Received: from DFLE112.ent.ti.com (dfle112.ent.ti.com [10.64.6.33]) by fllv0035.itg.ti.com (8.15.2/8.15.2) with ESMTP id 02C71TPB017366; Thu, 12 Mar 2020 02:01:29 -0500 Received: from DFLE113.ent.ti.com (10.64.6.34) by DFLE112.ent.ti.com (10.64.6.33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1847.3; Thu, 12 Mar 2020 02:01:28 -0500 Received: from localhost.localdomain (10.64.41.19) by DFLE113.ent.ti.com (10.64.6.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1847.3 via Frontend Transport; Thu, 12 Mar 2020 02:01:28 -0500 Received: from [192.168.2.6] (ileax41-snat.itg.ti.com [10.172.224.153]) by localhost.localdomain (8.15.2/8.15.2) with ESMTP id 02C71O9n084767; Thu, 12 Mar 2020 02:01:24 -0500 Subject: Re: [PATCH v6 3/3] drm: bridge: cdns-mhdp: add j721e wrapper To: Laurent Pinchart , Yuti Amonkar CC: , , , , , , , , , , , , , , , References: <1582712579-28504-1-git-send-email-yamonkar@cadence.com> <1582712579-28504-4-git-send-email-yamonkar@cadence.com> <20200311205217.GD4863@pendragon.ideasonboard.com> From: Tomi Valkeinen Message-ID: <0e9b73b7-a960-e2a1-d8a1-f12309755176@ti.com> Date: Thu, 12 Mar 2020 09:01:23 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 MIME-Version: 1.0 In-Reply-To: <20200311205217.GD4863@pendragon.ideasonboard.com> Content-Type: text/plain; charset="utf-8"; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Laurent, On 11/03/2020 22:52, Laurent Pinchart wrote: >> +void cdns_mhdp_j721e_enable(struct cdns_mhdp_device *mhdp) >> +{ >> + /* >> + * Eneble VIF_0 and select DPI2 as its input. DSS0 DPI0 is connected >> + * to eDP DPI2. This is the only supported SST configuration on >> + * J721E. > > Without hardware documentation I can't really comment on this, but I'd > like to make sure it doesn't imply that the MHDP has more than one input > and one output. You can download the TRM for j721e here: http://www.ti.com/lit/pdf/spruil1 MHDP has one DP output, but 4 inputs to support MST and split/dual panel modes. None of those are supported by the drivers, but perhaps some thought should be paid to figure out if adding these features affect the DT bindings. Tomi -- Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki