From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.17]) (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 66630396D24; Tue, 3 Feb 2026 10:04:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.17 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770113096; cv=none; b=Z2FXQ6eewzp3j7gz01FaokPAIHTECYuEiRNiPHJn3K4Kdb46oSbVq7a243ylNT3ZCMjiKr6LQRxYCM4EfLzLMNFyo7qHrGfH9uIxSaPSzDgOWxfCLaqENijC1eO1LuKgmZ5z2yb3u1ySrCoP8610t9n+toxAFs1+EqrHa4r/tUQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770113096; c=relaxed/simple; bh=vtrpsVqQb5YbyQPqbOoqVjxnUae20uePToXzdPR9HFg=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=mIoJ3D10YiDERzDqgCFn3HgzjvdaTbXBGNoGLJOfSoavo7IL5hYUr62w15ZnG46BxMX8HlC59AbDWAhGjCr7bcAU+EJglc3DHskNxI8z4GExfuPjI6pa9kTYeZ5ysEX1iDVOA5hCbUKeWC6adUjmnazqnizvZsVZKa1YegS0hq8= 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=n/d9IjOT; arc=none smtp.client-ip=198.175.65.17 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=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="n/d9IjOT" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1770113095; x=1801649095; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=vtrpsVqQb5YbyQPqbOoqVjxnUae20uePToXzdPR9HFg=; b=n/d9IjOTt/U8zzM0q7vJZP+dm4jEY5JkdQ+9vjzCLqzmu9Ni9GqmHjj9 DqhSYgOknWE8YoCU0MuGzpCZQ6D8FvzNkaMAbjfGXP9OfG1UwDArpQScu VYDX9zjRujMqxiCHNqW5xDl8SMUOqA5vv+7MLXxGpbRBvyQjHL2F8MvX0 iz4PVYVQJS3p13uFQo1YgAoOwXI7eZ4E2jjUR4yCSNXYZidIOqIxg2JtO uYK56V8HTdJ6zyNuVTP7bachyLsDewWn8HNos0nmxkT4wm52bjMnbm4Fw xk4h5zm8yUbkT/pfkmRdo89Oy24qRFT2Tw854Lp8rnj35qgU8siviGSkZ A==; X-CSE-ConnectionGUID: pJNGc9MHQuOCaR9USnj9NQ== X-CSE-MsgGUID: siD45I7zR4KkJAL13d3jLA== X-IronPort-AV: E=McAfee;i="6800,10657,11690"; a="71262688" X-IronPort-AV: E=Sophos;i="6.21,270,1763452800"; d="scan'208";a="71262688" Received: from fmviesa010.fm.intel.com ([10.60.135.150]) by orvoesa109.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Feb 2026 02:04:55 -0800 X-CSE-ConnectionGUID: cQg2U5gcRlGlQJ4QvktJ9A== X-CSE-MsgGUID: k4wVpFo6TQCFjuzyYyKKSA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,270,1763452800"; d="scan'208";a="209977287" Received: from black.igk.intel.com ([10.91.253.5]) by fmviesa010.fm.intel.com with ESMTP; 03 Feb 2026 02:04:53 -0800 Received: by black.igk.intel.com (Postfix, from userid 1001) id 1BB7495; Tue, 03 Feb 2026 11:04:52 +0100 (CET) Date: Tue, 3 Feb 2026 11:04:52 +0100 From: Mika Westerberg To: correctmost Cc: Andy Shevchenko , dmaengine@vger.kernel.org, regressions@lists.linux.dev, vkoul@kernel.org, linux-i2c@vger.kernel.org Subject: Re: [REGRESSION][BISECTED] Lenovo IdeaPad touchpad does not work when idma64 is present in initramfs Message-ID: <20260203100452.GE2275908@black.igk.intel.com> References: <20260129065837.GT2275908@black.igk.intel.com> <513c490f-c433-4298-ae66-6e165aa7b299@app.fastmail.com> <20260129115609.GV2275908@black.igk.intel.com> <7d966d39-aa5a-4a0f-a115-a4b90632a26c@app.fastmail.com> <20260130072620.GW2275908@black.igk.intel.com> <53bd143f-525d-4748-af93-3460c9f59d1a@app.fastmail.com> <20260202075118.GY2275908@black.igk.intel.com> <00ee321d-1f36-4f1e-91f7-fdee4212c5cc@app.fastmail.com> <20260202102225.GB2275908@black.igk.intel.com> <5ed857f5-59ae-4052-8f2e-dac7fcd014cc@app.fastmail.com> Precedence: bulk X-Mailing-List: linux-i2c@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <5ed857f5-59ae-4052-8f2e-dac7fcd014cc@app.fastmail.com> On Mon, Feb 02, 2026 at 06:16:02AM -0500, correctmost wrote: > > Could you drop the above hack again so that it should "fail". Then build > > the kernel with CONFIG_PREEMPT_VOLUNTARY=y and add the below hack. Perhaps > > this is just lucky timing? Please try a couple of boots and make sure the > > results are the same each time. > > I cold booted five times and the touchpad did not work during any of those boots. Thanks! > I noticed that the "probe with driver" failure reports -22 instead of -110 now: > > [ 33.023932] i2c_hid_acpi i2c-ELAN06FA:00: Report Descriptor: 05 01 09 02 a1 01 85 01 09 01 a1 00 05 09 19 01 29 02 15 00 25 01 75 01 95 02 81 02 95 06 81 03 05 01 09 30 09 31 15 81 25 7f 75 08 95 02 81 06 75 08 95 05 81 03 c0 06 00 ff 09 01 85 0e 09 c5 > [ 33.026070] hid-generic 0018:04F3:327E.0001: item fetching failed at offset 638/675 > [ 33.027573] hid-generic 0018:04F3:327E.0001: probe with driver hid-generic failed with error -22 > ... > [ 33.183959] hid-multitouch 0018:04F3:327E.0001: item fetching failed at offset 638/675 > [ 33.183975] hid-multitouch 0018:04F3:327E.0001: probe with driver hid-multitouch failed with error -22 > This is really odd because "item fetching" is not really accessing any hardware bus - it just parses the descriptor and the descriptor looks fine to me (and this is the same as in case of working run): Usage Page (Generic Desktop) Usage (Generic Desktop.Mouse) Collection (1) Report ID (1) Usage (Generic Desktop.Pointer) Collection (0) Usage Page (Button) Usage Minimum (1) Usage Maximum (2) Logical Minimum (0) Logical Maximum (1) Report Size (1) Report Count (2) Input (2) Report Count (6) Input (3) Usage Page (Generic Desktop) Usage (Generic Desktop.X) Usage (Generic Desktop.Y) Logical Minimum (129) Logical Maximum (127) Report Size (8) Report Count (2) Input (6) Report Size (8) Report Count (5) Input (3) End Collection (0) Usage Page (Vendor Defined Page 1) Usage (Vendor Defined Page 1.Vendor Usage 1) Report ID (14) Usage (Vendor Defined Page 1.00c5) I noticed you still have: [ 0.069726] Dynamic Preempt: full Can you change that in .config to: CONFIG_PREEMPT_VOLUNTARY=y Also let's add on top of everything one more hack patch, just in case ;-) diff --git a/drivers/i2c/i2c-core-acpi.c b/drivers/i2c/i2c-core-acpi.c index ed90858a27b7..0297ebedb802 100644 --- a/drivers/i2c/i2c-core-acpi.c +++ b/drivers/i2c/i2c-core-acpi.c @@ -371,7 +371,7 @@ static const struct acpi_device_id i2c_acpi_force_100khz_device_ids[] = { * a 400KHz frequency. The root cause of the issue is not known. */ { "DLL0945", 0 }, - { "ELAN06FA", 0 }, +// { "ELAN06FA", 0 }, {} };