From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ed2-f35.google.com (mail-ed2-f35.google.com [74.125.228.99]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 41067495050 for ; Wed, 23 Sep 2026 10:48:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.228.99 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790160515; cv=none; b=FYYAEffYOqblZlgg9XBjqrI60AXGbCMmNTT+kWaMaFvLBPjintxMsW/P6H5s8FjYvaVeXHe633zycnShNQJw8kg6/7TZDfRLuJ0m9XjCfRE9MDyVVhXklCWNwlC3VBsQOo/4MLTCjrKwiqM2qIFw4G3TBBWezz7yFhIsb6gdXtk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790160515; c=relaxed/simple; bh=00LliydZFbWhN9/JMAzKVWb41FNb6WBNeqfGEFRG2kg=; h=Message-ID:Date:MIME-Version:From:Subject:To:Cc:References: In-Reply-To:Content-Type; b=ruwI/pAIrdqnja3Wl9UymL/t+yey4BF3IGxtO4nYCRZvGrV9Rz+pqcqd7MTY106EPtlV1ZtTsjtC0IcWsI/tfuOESo9RUT57TTDgYd9NXhfSJ3It7TkBbztSGzkFNhAkuRA15osYoP96tUYw0n166FUsgbkvGLzK1tXGWLdeI7U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org; spf=pass smtp.mailfrom=linaro.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b=r0IABQMu; arc=none smtp.client-ip=74.125.228.99 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linaro.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="r0IABQMu" Received: by mail-ed2-f35.google.com with SMTP id 4fb4d7f45d1cf-6a99c5de614so1076977a12.2 for ; Wed, 23 Sep 2026 03:48:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1790160502; x=1790765302; darn=vger.kernel.org; h=content-transfer-encoding:content-type:in-reply-to:organization :autocrypt:content-language:references:cc:to:subject:reply-to:from :user-agent:mime-version:date:message-id:from:to:cc:subject:date :message-id:reply-to:content-type; bh=ZdJeS2NWmvwKi1c64k6v6zLwI+NJ1nsn1DFESP4VK7w=; b=r0IABQMuL0y0pNWY6MK03jt7Yslr3rYLDYj5OJGgmY6DzpjbuBgQ6wRWoY85S7BPcC 5Yezmzf+nSS/h6ybdVQAox3g74WwFYGtXU39ziG6HD4hjH/RR5ZhdxulJgfgjJt23dpc ZMIqUCc1tSNHSY2ikxkVh+BHdUC1hd2Hvt/JDzxC5MkzFfCU8ivV1057FVCrhIUhW4gw TngLjSParB4QVbZNuFr3yKIyhQtwyFjCj6GLvyzcy10pZpx55wri9QsrMSuzHHMaFKMk x0OdJiU4qQU0Qs6QchTf9u5KW0gZGKBxmncaUsun8xP4nMkNtdCuUgXTjSjqG9hPKlJs +3Wg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1790160502; x=1790765302; h=content-transfer-encoding:content-type:in-reply-to:organization :autocrypt:content-language:references:cc:to:subject:reply-to:from :user-agent:mime-version:date:message-id:x-gm-gg:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to:content-type; bh=ZdJeS2NWmvwKi1c64k6v6zLwI+NJ1nsn1DFESP4VK7w=; b=ILNXpnwiVZftCKZjBUpaVZ4+zx0X/30/g7XBvf5oC04uUxHRv+aM7rj8YpisMkWnC9 kSG1UxgBjLp6QcWAjE2Mek83QNt4K4AStO7no0HmdFnr5KfDCvQsxvqWKwmHgrOexA9r ujysBhKPf5l8Af4UhEihsANDrP2XX8Fb+UuW8gvNJL7fPTEjC4waxF8mDeTpOXsECziF XIiFlrY2DWmEoBzGiqqAPBvJbPi6vVbaIYmAwezCOf/IPtezxPH+9ojkGIvZDiPZQ36p dNboXzEfp+Po3+nuta2WugEwJa12h1oc5lb5OdfvVSeoMa9Acx+FhvGkFXcObMragIfy CfeA== X-Forwarded-Encrypted: i=1; AKwUvBwCKqO9UN6xQohRIUgRIlUHgWdV/mf1tQR5qkryPLgSRWEHSMSPw4A/p+L+7ks8+TZPWGb/a090l6Ov224=@vger.kernel.org X-Gm-Message-State: AFuF++ld3agEirS1i+WsHUFyJxzKjphyjd4Tm2+XnlD5cD87Gv/QTQau F3Kbp+4++WOTrNa0d9uScjkG6w0UML0lTxylkVbCnUKgwoznp/7oVRrlKbE7lxcus3o= X-Gm-Gg: AYBFou2vcsdsD93gSYaPh1DkCjjVyF0xAZg8VmcpNDW8S1ViEVdLU36S4513lfRFW9T RY0ECE8LHmRx/XQ4zgfJMa8YW9scJ2i9juRSjrrtRCtBoRwBAwG23vmpm3/ylIC2hc/710/nSUd T/u89w/fW630jvqLJ1xC1wBCA7oTAsPsaWGWqlkCjaD2gEKJCY1sN4/ljF9vs8mcwLzmeGwN+mk iVzuCBAXG5hIyfix0WCtGJ8Wrpf4qVJedRsSxiH4ghv0q+cMvKHBJanYuqYtHvGrgDFZAEhee4r L6oRiEsIxdXA/XEECkrSs3fkWEvYimCH0+lAcCS9S1Y0seplB5HLVSmpxMGoDvXyYqWQ5zJcXUH /F9OstGNDUwkXDneROkM2cCK2ljNFJhdGe8D2LuvZvQd+G77n3Hy7Y3j1OrqDINtxCxuC/upe5y zJFA9q+W4joFUyxcUX2/XXmC5rjhMBzc9Rh/C0XB1aLr6eQvkAouWWL6k22E6k+ePMILvTw+lTE 92iiptoyinDB9MfABWDx6NJT9lNyeI28byNsN/rXKi0kMNl/Ra8Pw== X-Received: by 2002:a05:6402:52c5:b0:6a9:d0f0:69a0 with SMTP id 4fb4d7f45d1cf-6aab3b0a3e2mr1757911a12.11.1790160502330; Wed, 23 Sep 2026 03:48:22 -0700 (PDT) Received: from ?IPV6:2a01:e0a:106d:1080:4140:d290:ef49:44ba? ([2a01:e0a:106d:1080:4140:d290:ef49:44ba]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-48868266822sm6706162f8f.5.2026.09.23.03.48.21 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 23 Sep 2026 03:48:21 -0700 (PDT) Message-ID: Date: Wed, 23 Sep 2026 12:48:21 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird From: neil.armstrong@linaro.org Reply-To: Neil Armstrong Subject: Re: [REGRESSION] Resolutions broken after "drm/msm: dsi: fix PLL init in bonded mode" To: Dmitry Baryshkov , Thorsten Leemhuis Cc: Mohit Dsor , linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org, vishnu.saini@qualcomm.oss.com, Linux kernel regressions list References: <20251027-topic-sm8x50-fix-dsi-bonded-v1-1-a477cd3f907d@linaro.org> <114b9be8-1fca-4762-822e-1d53838d5de5@leemhuis.info> <493b8d4c-164e-43c9-93c8-40cc251b1c3b@leemhuis.info> Content-Language: en-US, fr Autocrypt: addr=neil.armstrong@linaro.org; keydata= xsBNBE1ZBs8BCAD78xVLsXPwV/2qQx2FaO/7mhWL0Qodw8UcQJnkrWmgTFRobtTWxuRx8WWP GTjuhvbleoQ5Cxjr+v+1ARGCH46MxFP5DwauzPekwJUD5QKZlaw/bURTLmS2id5wWi3lqVH4 BVF2WzvGyyeV1o4RTCYDnZ9VLLylJ9bneEaIs/7cjCEbipGGFlfIML3sfqnIvMAxIMZrvcl9 qPV2k+KQ7q+aXavU5W+yLNn7QtXUB530Zlk/d2ETgzQ5FLYYnUDAaRl+8JUTjc0CNOTpCeik 80TZcE6f8M76Xa6yU8VcNko94Ck7iB4vj70q76P/J7kt98hklrr85/3NU3oti3nrIHmHABEB AAHNKk5laWwgQXJtc3Ryb25nIDxuZWlsLmFybXN0cm9uZ0BsaW5hcm8ub3JnPsLAkQQTAQoA OwIbIwULCQgHAwUVCgkICwUWAgMBAAIeAQIXgBYhBInsPQWERiF0UPIoSBaat7Gkz/iuBQJk Q5wSAhkBAAoJEBaat7Gkz/iuyhMIANiD94qDtUTJRfEW6GwXmtKWwl/mvqQtaTtZID2dos04 YqBbshiJbejgVJjy+HODcNUIKBB3PSLaln4ltdsV73SBcwUNdzebfKspAQunCM22Mn6FBIxQ GizsMLcP/0FX4en9NaKGfK6ZdKK6kN1GR9YffMJd2P08EO8mHowmSRe/ExAODhAs9W7XXExw UNCY4pVJyRPpEhv373vvff60bHxc1k/FF9WaPscMt7hlkbFLUs85kHtQAmr8pV5Hy9ezsSRa GzJmiVclkPc2BY592IGBXRDQ38urXeM4nfhhvqA50b/nAEXc6FzqgXqDkEIwR66/Gbp0t3+r yQzpKRyQif3OwE0ETVkGzwEIALyKDN/OGURaHBVzwjgYq+ZtifvekdrSNl8TIDH8g1xicBYp QTbPn6bbSZbdvfeQPNCcD4/EhXZuhQXMcoJsQQQnO4vwVULmPGgtGf8PVc7dxKOeta+qUh6+ SRh3vIcAUFHDT3f/Zdspz+e2E0hPV2hiSvICLk11qO6cyJE13zeNFoeY3ggrKY+IzbFomIZY 4yG6xI99NIPEVE9lNBXBKIlewIyVlkOaYvJWSV+p5gdJXOvScNN1epm5YHmf9aE2ZjnqZGoM Mtsyw18YoX9BqMFInxqYQQ3j/HpVgTSvmo5ea5qQDDUaCsaTf8UeDcwYOtgI8iL4oHcsGtUX oUk33HEAEQEAAcLAXwQYAQIACQUCTVkGzwIbDAAKCRAWmrexpM/4rrXiB/sGbkQ6itMrAIfn M7IbRuiSZS1unlySUVYu3SD6YBYnNi3G5EpbwfBNuT3H8//rVvtOFK4OD8cRYkxXRQmTvqa3 3eDIHu/zr1HMKErm+2SD6PO9umRef8V82o2oaCLvf4WeIssFjwB0b6a12opuRP7yo3E3gTCS KmbUuLv1CtxKQF+fUV1cVaTPMyT25Od+RC1K+iOR0F54oUJvJeq7fUzbn/KdlhA8XPGzwGRy 4zcsPWvwnXgfe5tk680fEKZVwOZKIEuJC3v+/yZpQzDvGYJvbyix0lHnrCzq43WefRHI5XTT QbM0WUIBIcGmq38+OgUsMYu4NzLu7uZFAcmp6h8g Organization: Linaro In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Hi, On 7/8/26 15:31, Dmitry Baryshkov wrote: > On Wed, Jul 08, 2026 at 09:26:04AM +0200, Thorsten Leemhuis wrote: >> On 7/6/26 11:52, Mohit Dsor wrote: >>> On Wed, Jun 03, 2026 at 03:11:34PM +0300, Dmitry Baryshkov wrote: >>>> On Wed, Jun 03, 2026 at 11:56:15AM +0200, Thorsten Leemhuis wrote: >>>>> On 5/4/26 22:09, Mohit Dsor wrote: >>>>>> Sorry for the late reply. I am attaching clk_summary and reg_dump in >>>>>> working and non working case. Lilliput is just a normal display working >>>>>> with hdmi and has 720p as preferred mode. Yes, I was talking about RB3 >>>>>> Gen2 only. >>>>> >>>>> Neil, Dmitry, and Mohit: what's the status here? From the outside it >>>>> looks like this regression is still unfixed with nothing happening for >>>>> weeks now. Or has progress been made and I just missed it? >>>> >>>> Thanks as a reminder. Unfortunately, it takes some more time (and I've >>>> been a bit overloaded lately). Worst case I will send a revert soon. >>>> >>> Just wanted to check if you had a chance to look into this issue and whether there's any update on the investigation from your side. >> Hmm, no reply. Given that we are entering holiday season and are way >> past what Linus expects in a situation like this[1] I'd say we should go >> for a revert, unless some fix shows up really soon now. Sorry I'm very late to the party, and checked again, reverting this breaks all dual-DSI setup on SM8650, and probably other similar SoCs. Here's a complete log of the breakage which appears on the Ayaneo PS2 running v7.3-rc3 with mainline panel driver: https://gitlab.postmarketos.org/-/snippets/65 I don't see why my fix did break this use case since it reverted the way the dual DSI PHYs were initialized to actually allow the dual-DSI setup. Thanks, Neil >> >> Ciao, Thorsten > > Please send a revert. > >> >> [1] To quote Linus statements from >> https://www.kernel.org/doc/html/latest/process/handling-regressions.html#on-how-quickly-regressions-should-be-fixed >> >> """ >> From 2026-01-22: >> >> But a user complaining should basically result in an immediate fix - >> possibly a "revert and rethink". >> >> With a later clarification on 2026-01-28: >> >> It's also worth noting that "immediate" obviously doesn't mean "right >> this *second* when the problem has been reported". >> >> But if it's a regression with a known commit that caused it, I think >> the rule of thumb should generally be "within a week", preferably >> before the next rc. >> """ >