From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail11.truemail.it (mail11.truemail.it [217.194.8.81]) (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 891E83AE706; Mon, 10 Aug 2026 21:12:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.194.8.81 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786396337; cv=none; b=hpjh37tjCTtYozf585bRv6IdiGmnlRPZCdsrRoPrvCM6RWHiZkMsf2WPpvaCFK9NH1paIkjn6IiGnjvfWXrsxoOpo4j1eOOtTQE9S7Zy8YbII5YkpVwp2Ds6pjt05pQDmJaXJm4JT/2wF0TSuspQBxXg4yYY/TVxzPhwO494T7I= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786396337; c=relaxed/simple; bh=4oSfONn5Yz63lyUzLtV+gfMtS9ynEzwvoGCshYVSCu4=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=qCkI0SkAPY0sQ4XNFxgmkFDIxeCB6cZwPNDG81DG9j7eM8EauP1gC2bmo32uGRQ6igZIAbkDSWjcddRKo2kGbuv9KFche3S3BVg5DSjy2WlHnsbf0sF5dUBaStBa/f4vxJOznaHYnBPAVf5fPoj4/NYwGKB/oIyacSS5h2ukSVQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=dolcini.it; spf=pass smtp.mailfrom=dolcini.it; dkim=pass (2048-bit key) header.d=dolcini.it header.i=@dolcini.it header.b=XWTnSgQB; arc=none smtp.client-ip=217.194.8.81 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=dolcini.it Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=dolcini.it Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=dolcini.it header.i=@dolcini.it header.b="XWTnSgQB" Received: from francesco-nb (93-49-2-63.ip317.fastwebnet.it [93.49.2.63]) by mail11.truemail.it (Postfix) with ESMTPA id 6FA341F8D1; Mon, 10 Aug 2026 23:12:10 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=dolcini.it; s=default; t=1786396331; bh=4oSfONn5Yz63lyUzLtV+gfMtS9ynEzwvoGCshYVSCu4=; h=From:To:Subject; b=XWTnSgQBHutL2fKLqJf4aoRhkbR7qWiLGZcae4flULuRgn7Tb2aM5hav9mSUzoGMU ur+BfXUM/0J4oYdc1GRs2qSoVMPymIeTZ5toEAc21RekgM4zhNRRR7/uOC6hjYqu3q 72IXMHiR5hqiDLOghTTwNzGbiwY2Hcyi2zZda7RWS2vA75r3FRiBi7MY18UtAqE7j+ ld5sGLfTehy8Q7Eq18+tc8jCdRw0HvThS/I611mRCR+vaZPuxMIEQcH9AtxnX59u4t 2+dnSc9VXLRFqg0Sd3GPt5u2tKSPrbXmvA+ZACLkKpDVJanaGlD6+HotDsa208IQKC OLBZwUxNuPlSQ== Date: Mon, 10 Aug 2026 23:12:09 +0200 From: Francesco Dolcini To: Leonardo Costa Cc: hongxing.zhu@nxp.com, l.stach@pengutronix.de, lpieralisi@kernel.org, kwilczynski@kernel.org, mani@kernel.org, robh@kernel.org, bhelgaas@google.com, Frank.Li@nxp.com, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, regressions@lists.linux.dev, linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, imx@lists.linux.dev, linux-kernel@vger.kernel.org, leonardo.costa@toradex.com, francesco@dolcini.it Subject: Re: [REGRESSION] mainline/master: PCI link creation fails on Apalis iMX6 Message-ID: <20260810211209.GB4821@francesco-nb> References: 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: Hello all, On Mon, Aug 10, 2026 at 02:54:45PM -0300, Leonardo Costa wrote: > We are seeing a regression on Apalis iMX6 where connected PCI device > links fail to come up at initialization, as shown below. The issue is > not on the devices' physical connection, as they worked properly on v7.1 > and are working on other stable kernel versions. just to make this more clear. 610fa91d9863 ("PCI: imx6: Assert PERST# before enabling regulators") introduced a regression that prevented the boot. because of that we were not able to run any of our test in our CI/CD commit 7678e81498e2 ("PCI: imx6: Fix i.MX6Q/DL boot hang caused by improper PHY power sequencing") fixes the boot issue, but now PCIe is not longer working Francesco