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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E53F0C04A94 for ; Wed, 2 Aug 2023 17:36:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232311AbjHBRg3 (ORCPT ); Wed, 2 Aug 2023 13:36:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53404 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232252AbjHBRgK (ORCPT ); Wed, 2 Aug 2023 13:36:10 -0400 Received: from phobos.denx.de (phobos.denx.de [85.214.62.61]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E73923C02 for ; Wed, 2 Aug 2023 10:35:00 -0700 (PDT) Received: from [127.0.0.1] (p578adb1c.dip0.t-ipconnect.de [87.138.219.28]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: marex@denx.de) by phobos.denx.de (Postfix) with ESMTPSA id 5C82A86879; Wed, 2 Aug 2023 19:34:03 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=denx.de; s=phobos-20191101; t=1690997644; bh=XwFK3L9YauS9V85jsvpUthDzNCzhrXp9TLJ01qFpdpU=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=F1zPl7Yi2QzjoG/Sty7wipc8AbAV4wQ0mGJ8Lckm/jbAqpZyBnvVuVdecthVjtBVR EeJwHrwVa/6sEPRx9ScbS4XpPqYEkmAk1pHAVzibVsRtMRfvrZVoDESqyRgWNSq8n5 vi0ZQ9myQ954PtewvN3YHZTQv+0LEbb1vCwfXegrXEcBN4oFx5CcG9eAlBKhBVddF7 2OedU7DTsgBIyJXsc4rUKX5Mg5n/GU+o3/tJTYgNtTABF5sgypIXCKQv+EoL43EtDT MF9uU9Es0lAQ08tqUeUeW+TVRxeQEyXumyJCq+F/4HF1K6+ufQ27kIGz9/A7Ptgbl7 XqhdtS74EaoqA== Message-ID: Date: Wed, 2 Aug 2023 19:30:09 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.13.1 Subject: Re: [PATCH] Revert "drm/bridge: lt9611: Do not generate HFP/HBP/HSA and EOT packet" Content-Language: en-US To: Dmitry Baryshkov , Neil Armstrong , Andrzej Hajda , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , David Airlie , Daniel Vetter Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Jagan Teki , Abhinav Kumar , Amit Pundir References: <20230802-revert-do-not-generate-hfp-hbp-hsa-eot-packet-v1-1-f8a20084e15a@linaro.org> <5cf0e3fa-f66d-06c4-cfda-c48efd8c6508@linaro.org> From: Marek Vasut In-Reply-To: <5cf0e3fa-f66d-06c4-cfda-c48efd8c6508@linaro.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Virus-Scanned: clamav-milter 0.103.8 at phobos.denx.de X-Virus-Status: Clean Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 8/2/23 15:38, Dmitry Baryshkov wrote: > On 02/08/2023 11:52, Neil Armstrong wrote: >> This reverts commit [1] to fix display regression on the Dragonboard 845c >> (SDM845) devboard. >> >> There's a mismatch on the real action of the following flags: >> - MIPI_DSI_MODE_VIDEO_NO_HSA >> - MIPI_DSI_MODE_VIDEO_NO_HFP >> - MIPI_DSI_MODE_VIDEO_NO_HBP >> which leads to a non-working display on qcom platforms. >> >> [1] 8ddce13ae696 ("drm/bridge: lt9611: Do not generate HFP/HBP/HSA and >> EOT packet") >> >> Cc: Marek Vasut >> Cc: Robert Foss >> Cc: Jagan Teki >> Cc: Dmitry Baryshkov >> Cc: Abhinav Kumar >> Fixes: 8ddce13ae69 ("drm/bridge: lt9611: Do not generate HFP/HBP/HSA >> and EOT packet") >> Reported-by: Amit Pundir >> Link: >> https://lore.kernel.org/r/CAMi1Hd0TD=2z_=bcDrht3H_wiLvAFcv8Z-U_r_KUOoeMc6UMjw@mail.gmail.com/ >> Signed-off-by: Neil Armstrong >> --- >>   drivers/gpu/drm/bridge/lontium-lt9611.c | 4 +--- >>   1 file changed, 1 insertion(+), 3 deletions(-) >> > Acked-by: Dmitry Baryshkov #fix db845c > > The boards broken by [1] are used in production by different parties > since 5.10, breaking them doesn't seem more acceptable than breaking the > new out-of-tree iMX8m hardware. The MX8M is also in-tree, so this does not apply.