From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.zeus03.de (zeus03.de [194.117.254.33]) (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 12120367297 for ; Fri, 29 May 2026 14:42:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=194.117.254.33 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780065740; cv=none; b=U0hmfRZu6y+Vo7/tlla36E38b4oku+2SZ4M/18b7l81QRnnMaL2lErbHP/n+TFzRoCdSsSWaGW4YZTNW7gKNj1hBedm9szM3Ji51IhAxsGIKmRSzNXBlbNl7A7HuNFm9fSKHzFPOvIdLDnIuDW5s8N6jbc4B6uibt9jm7qlEF1Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780065740; c=relaxed/simple; bh=Fz5OFV5vjm42dq9yavRtFmnwVCTEz31MrsDboIka6Ws=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=MST+tlO9mi2QpQ4bYll8HH8hSxckm0rLC2OyyG7v+amvVWLfIivdBZwkG3hVqyLWOApH42a1vdk6XgrCXx3kBRKBcW9wYJZQoWqCqqK8J8S9zgapKElKt4vf7wbraNU1u2p97eF7+6NUhtrRb3Bug8x+UO9bGA2m+eHEWZKrcyI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=sang-engineering.com; spf=pass smtp.mailfrom=sang-engineering.com; dkim=pass (2048-bit key) header.d=sang-engineering.com header.i=@sang-engineering.com header.b=UkRNZrLr; arc=none smtp.client-ip=194.117.254.33 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=sang-engineering.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sang-engineering.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=sang-engineering.com header.i=@sang-engineering.com header.b="UkRNZrLr" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= sang-engineering.com; h=date:from:to:cc:subject:message-id :references:mime-version:content-type:in-reply-to; s=k1; bh=cuZ5 kKTLsfM9Zu8g1NbjST2CeqE4F2ocBFei/epHMfA=; b=UkRNZrLrPYep6DUebnJn 3rl8Qiu7aaYGXCZISTkRW94/a8m+mJkC1pbcCRK4SO9x1cLJfO8t9r/AHNe4PSJr CeUqeTRR4l8h632fXliUPEl1UtVJ2mKLDFW7kTw+NZFRIe2EoivyxB5eetkrP6dJ wmjqDfh8XihzCeQNaNk56z+zBv32D+vBpFiFNIZmYoj3knksSBzrK372TjlzErUo 4MNtgbzMvsTK3B6Tbzy1pUV7/tqcjFGui05Yv/uCUvVGCTsA98ezpXavvunke6wM etCNdzAnu986UM8ok65pIcybsemaTH/0eCTOaC9tigmq+V8S87+GpcxhIeljU7TC FA== Received: (qmail 1450859 invoked from network); 29 May 2026 16:42:07 +0200 Received: by mail.zeus03.de with ESMTPSA (TLS_AES_256_GCM_SHA384 encrypted, authenticated); 29 May 2026 16:42:07 +0200 X-UD-Smtp-Session: l3s3148p1@lQxe2fVSrpsqAQ4KEBW5QLbOwWyJKVt/ Date: Fri, 29 May 2026 16:42:07 +0200 From: Wolfram Sang To: Hardik Prakash Cc: linux-i2c@vger.kernel.org, linux-gpio@vger.kernel.org, wsa@kernel.org, andriy.shevchenko@intel.com, mario.limonciello@amd.com, brgl@bgdev.pl, basavaraj.natikar@amd.com, linusw@kernel.org Subject: Re: [PATCH v8 0/2] i2c: designware: fix WACF2200 touchscreen probe ordering Message-ID: References: <20260529100838.8896-1-hardikprakash.official@gmail.com> Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="jN9PZrx3kRwNj49f" Content-Disposition: inline In-Reply-To: <20260529100838.8896-1-hardikprakash.official@gmail.com> --jN9PZrx3kRwNj49f Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, May 29, 2026 at 03:38:35PM +0530, Hardik Prakash wrote: > This series fixes the non-functional WACF2200 touchscreen on Lenovo > Yoga 7 14AGP11 by: >=20 > 1. Reverting the earlier DMI-specific GPIO IRQ quirk (patch 1 of the > original series, already in Torvalds' tree) which is no longer > needed. >=20 > 2. Adding a generic probe deferral in i2c-designware that walks ACPI > child devices, finds GpioInt resources, and defers probe until the > referenced GPIO controllers are fully bound. >=20 > Testing confirms patch 2 alone is sufficient =E2=80=94 the existing > amd_gpio_irq_enable() flow works correctly once probe ordering is > fixed, making the manual IRQ restoration in the reverted patch > unnecessary. >=20 > The probe ordering race was confirmed via dynamic debug tracing: >=20 > 0.285952 amd_gpio_probe: registering gpiochip <- GPIO chip visible > 0.287121 amd_gpio_probe: requesting parent IRQ <- probe still running > 0.301454 AMDI0010:02 dw_i2c_plat_probe: start <- races here > 2.348157 lost arbitration >=20 > Tested on Lenovo Yoga 7 14AGP11 (83TD), Fedora 44, kernel 7.1.0-rc5+. Shall this go in via i2c? --jN9PZrx3kRwNj49f Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEOZGx6rniZ1Gk92RdFA3kzBSgKbYFAmoZpbsACgkQFA3kzBSg KbaRCRAAjSsdhv6b6pdOFM2BffkCZM/6ZWCaNXB6RCbYmLw5BVfed318TxwOOL5T suUligqLCn1PPKBgNJAH89wIrgdvUUClz/eJL0CwOd17A2ReQ7e2ExN8x7yf9JWe PA3b3eRdZbBnnG78/m1EybesU0xo6x4Sh29p1MwHWdMke/AX4NNlcfNKfRwLVWhz vVqXjqGrspKDoebzSvAa93GZPv3lKKic8uIkD9eWnKP2ioZB0t2OPmyNwamXXLVi brqWg6S6ehk3eNfDa5wS0Je/Xz7oDJ0kATrexS1gpLKI4bYOTVAIlelAYo+vHm5r 0BuY67ERoo96S/a/TrRnaeRigoh/DYeH0cZXyKktB1L5UBxld7xCEfaoYlzTjqv5 AQl12CkVSw1GRg99jqPaTZh7AOGSvRmfQr+nnoGw3Rwl6K8j5l3P7LPO7BtOj1Ks nZBRFd1eRBJ5duHA2TVcV0oTRwv83luLDVbePRdzw2L1p8upW4ZWpySaa0QfO0An iguO4LCIhsPeU6vGT0vrx9SOZCg22/mDbTfYSeiZnZyl9MWEsk8+8AxjIouJfU4S xN/bYKMKDqJY5IF+olOMYaaBH3pmRzaNA8LQ6maCa7UEzoDZ9DhvvQUj39WFxPHg XikulRGJGQcw1ChCwBZzgT5OCSJEnUth44FfklzYvbP9dVkt7Ws= =Zk12 -----END PGP SIGNATURE----- --jN9PZrx3kRwNj49f--