From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1E42D2FA0DB for ; Wed, 26 Nov 2025 14:29:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.17 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764167373; cv=none; b=ZhV93bxyKn22nYF6U9O+X1U8XzoFVNerQcJ+9EUiZshjlTDhfQD5C/iANRpjKDUICMKcW6T+yAstwJA1TedmbX1ruclImCAzieNxJv0xYsHSYG5+7LV9paawzqsEDwDhR5xRk3ZLFPgSSRgN0M9X5vunMThPbj0h3GapPCfPo6Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764167373; c=relaxed/simple; bh=/LlqH9UbhyiWV5v/QUURxbvTmHPfX45iCRn7T7U7q6o=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=AMZzsJx1QlmHuMFCU6C/wpsKhM9ALexMpxuN+SryRMDjCYHIS3Dd0gjEvOkSH91RX7E0GbqkJCvNVM4C1ASQKyF1BkMK2sWxTgkrHwiFNdMcj7BcITOnXEkYn+NoTwCNc2dRjEPfAqWyhbvfW3HPs+2AH7cCYB3gz7dCpFjQXVU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=SLhkKeM9; arc=none smtp.client-ip=192.198.163.17 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="SLhkKeM9" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1764167372; x=1795703372; h=from:to:cc:subject:in-reply-to:references:date: message-id:mime-version; bh=/LlqH9UbhyiWV5v/QUURxbvTmHPfX45iCRn7T7U7q6o=; b=SLhkKeM9tn8W5WJPKDgZ4d+A5ZvMZVfiHSeP6QMtJ4gQg2wHVfQt3wPe 7neCkBnPrP43N/fVQMp+gmFX2/uwuh+087iV3iYnEVKzHSBMP9ijK8GH8 eY/OJbNpZhbqEehdy5lVgDrBwSlrPT+r4cVZ0hm+2iJZ3mzBjUTMeMtqv 5PIXD1RfHwBmKXRxbQpXHLzPHCZFvLRA+w3d1c/gbeG73Joli0QJ3wfeC XNGDgELra+2EimMSJfzQe4mdaiqXsumil2SREihY1+ENQpSDbggxoqB6B mOd0Jy+DHVmY7EKcjaIxKXiLq7kMhfiWcmLSYcwR6Of7nJ2VVe49O/WWG A==; X-CSE-ConnectionGUID: +jY8Q5y+TByjahYrUvTHZg== X-CSE-MsgGUID: kNtIdqc/QgScNOtZFNRbQg== X-IronPort-AV: E=McAfee;i="6800,10657,11625"; a="66093059" X-IronPort-AV: E=Sophos;i="6.20,228,1758610800"; d="scan'208";a="66093059" Received: from orviesa008.jf.intel.com ([10.64.159.148]) by fmvoesa111.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Nov 2025 06:29:32 -0800 X-CSE-ConnectionGUID: 4kGuRhgaQeyOIYLcD0bsQQ== X-CSE-MsgGUID: 9GkMVfUwR6G56ywLFwghBg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.20,228,1758610800"; d="scan'208";a="193049839" Received: from lfiedoro-mobl.ger.corp.intel.com (HELO localhost) ([10.245.246.1]) by orviesa008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Nov 2025 06:29:23 -0800 From: Jani Nikula To: Yaroslav , Yaroslav Bolyukin , Ville =?utf-8?B?U3lyasOkbMOk?= , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter Cc: Harry Wentland , Leo Li , Rodrigo Siqueira , Alex Deucher , Christian =?utf-8?Q?K=C3=B6nig?= , Wayne Lin , amd-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org Subject: Re: [PATCH v6 2/7] drm/edid: prepare for VESA vendor-specific data block extension In-Reply-To: <41fbf5af-559a-4810-82c1-5c2e8a497e5b@0la.ch> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo References: <20251126065126.54016-1-iam@lach.pw> <20251126065126.54016-3-iam@lach.pw> <68c55e772424f8e001898cdd1edcf4856820461e@intel.com> <41fbf5af-559a-4810-82c1-5c2e8a497e5b@0la.ch> Date: Wed, 26 Nov 2025 16:29:19 +0200 Message-ID: <493bcd10bdfc8a3123323b77eead3dacadc08e3c@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain On Wed, 26 Nov 2025, Yaroslav wrote: > On 2025-11-26 10:13, Jani Nikula wrote: >> On Wed, 26 Nov 2025, Yaroslav Bolyukin wrote: >>> Current VESA vendor-specific block parsing expects real block size to be >>> the same as the defined struct size, use real offsets in conditionals >>> instead to add struct fields in future commits. >>> >>> Signed-off-by: Yaroslav Bolyukin >> >> I think this is something we want to backport, since MSO would break >> with bigger vendor-specific blocks, and that leads to black screens on >> MSO displays. >> > > Not sure why would we want to backport that if we don't backport the > other changes, old kernels will just have the broken implementation, > which in reality affects almost no body, given that there were no bug > reports The failure mode is: Someone buys a new shiny laptop with eDP MSO, with bigger vendor block, and won't get a picture on screen. BR, Jani. -- Jani Nikula, Intel