From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.11]) (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 6CB053F327B; Sun, 13 Sep 2026 20:21:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.11 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789330908; cv=none; b=jUGpnc1K69UNGxynCo4yNjH68n0ObRdSSUVaHrLxrMgZMs8Hy/IhIszIsGRgFQ8S7pt90HjyI2lOBYxEcRT3RWCIIFZj1QaYRHt6kZaXMOAiyj48+Uw68a8/kWmfTvOiafnxddsVxl2BSYyE38zrYryNExmZ5UjYQDLLvveBlSs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789330908; c=relaxed/simple; bh=Syp5jBipzovEBojlCn+siYKCwLE5/zN8iVHiuAEzAkU=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=TwigJqAj/5hEYGzEOrf/ghNdm0Zvv8oOO4dAveufhdfDSWxhNrRr3LgputR4j0JbNYTj15/Dr+X71cLBdZSsQvkIDV2EaipnHPO5ueZwFb56Fu9oRHVT50+LU0JMGx3oxJw1XsYqIImg6cTidNs66ZnB7Ir+E+EMZuzRJ4gy1VU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=pass smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=E+Kfi1Zr; arc=none smtp.client-ip=198.175.65.11 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=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="E+Kfi1Zr" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1789330907; x=1820866907; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=Syp5jBipzovEBojlCn+siYKCwLE5/zN8iVHiuAEzAkU=; b=E+Kfi1ZrbfFL1S/+QILLohnFmD443/OSUxKsvpLsNailN3P8Nr06Yaup stLwvFoWMg1ZalFImojsstm5LTGYXb3EapZ21pRzy39N49dNM5rjKyIqK HY6ZxskIqAxSys8Zlk/0Y+XLm8z/leppm7YhOJqfOJRGwDsNU98hPldnS AvKCk2I2+kI13riLThFoNRuog/Qzjfw9Zp6xkzXrGL13ywdevpehfsHcp djkrobqbEZ7ZKETA2R6UXLFJ35BFdi1asgMraJbCf/cZKGBK67JMRrTz2 o0ESIDvzqlkCELqeiElfh4b4iOF8Th3jC+JAXi2yqTQrFBemonyrsSdb0 A==; X-CSE-ConnectionGUID: Q8xvPgfQTJSFz4iQ6fQe8Q== X-CSE-MsgGUID: sEJXCo0qRnGlYhZoumrvbg== X-IronPort-AV: E=McAfee;i="6800,10657,11904"; a="100027025" X-IronPort-AV: E=Sophos;i="6.27,100,1787036400"; d="scan'208";a="100027025" Received: from orviesa007.jf.intel.com ([10.64.159.147]) by orvoesa103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Sep 2026 13:21:47 -0700 X-CSE-ConnectionGUID: AUYoZfzYT0eHXG0Ulfozsg== X-CSE-MsgGUID: DqLzj6ytSw+5VVMsox8Igw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.27,100,1787036400"; d="scan'208";a="272432754" Received: from fpallare-mobl4.ger.corp.intel.com (HELO kekkonen.fi.intel.com) ([10.245.245.20]) by orviesa007-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Sep 2026 13:21:44 -0700 Received: from kekkonen.localdomain (localhost [IPv6:::1]) by kekkonen.fi.intel.com (Postfix) with SMTP id 902AD11F8E1; Sun, 13 Sep 2026 23:21:48 +0300 (EEST) Date: Sun, 13 Sep 2026 23:21:48 +0300 Organization: Intel Finland Oy - BIC 0357606-4 - c/o Alberga Business Park, 6 krs, Bertel Jungin Aukio 5, 02600 Espoo From: Sakari Ailus To: Thorsten Leemhuis Cc: Miguel Vadillo , linux-acpi@vger.kernel.org, rafael@kernel.org, lenb@kernel.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mehdi.djait@linux.intel.com, wei.a.xu@intel.com, atul.raut@intel.com, Linux kernel regressions list Subject: Re: [PATCH] ACPI: scan: Honor _DEP for Intel CVS devices Message-ID: References: <20260601194040.18223-1-miguel.vadillo@intel.com> <6e450fa2-8b40-48b6-b0b0-a1c4b72a383d@leemhuis.info> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Hi Thorsten, On Sun, Sep 13, 2026 at 10:27:15AM +0200, Thorsten Leemhuis wrote: > On 9/12/26 18:50, Thorsten Leemhuis wrote: > > On 6/1/26 21:40, Miguel Vadillo wrote: > >> CVS (Computer Vision Sensing) is an ACPI-enumerated device that sits > >> inline in the CSI-2 path between the camera sensor and Intel IPU. > >> On platforms where CVS is present, the camera sensor's ACPI node > >> declares a _DEP dependency on the CVS device. > >> > >> The CVS driver must be fully initialized before camera sensor drivers > >> probe, because CVS controls the CSI-2 link ownership handshake (via > >> GPIO REQ/RESP), the MIPI/CSI-2 lane configuration, and the camera > >> power domain. Without CVS ready, the sensor driver can bind but the > >> CSI-2 stream will not function correctly. > >> > >> The CVS driver calls acpi_dev_clear_dependencies() at the end of its > >> probe() to unblock waiting consumers once it is ready. > >> > >> Move the CVS HIDs from acpi_ignore_dep_ids[] to acpi_honor_dep_ids[] > >> so that camera sensor enumeration is deferred until the CVS driver has > >> finished probing, matching the behavior already in place for IVSC. > > > > TWIMC, there is a bug report where one or two people claim that this > > change caused a regression; the report is quite verbose (guess LLM > > assisted) and hard to grasp for me as outsider; requests for > > clarifications from my side were not really fruitful. Not sure what to > > make of this, but I thought I'd let you know; for details see: > > > > https://bugzilla.kernel.org/show_bug.cgi?id=221988 > > For completeness, a report that is more straight forward to read (at > least for me) was now posted here: > https://lore.kernel.org/all/20260912185836.309071-1-manuel.knitza@googlemail.com/ Thanks for the link, I've replied to the bug report. -- Kind regards, Sakari Ailus