From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 EF10E2A1BF; Mon, 24 Nov 2025 14:02:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763992977; cv=none; b=HU7BEXqHjTfT1+u53QR4RLrFXvCQbBCjF176wLqkxcJh0TVplxtxNPaEb4FsDjyNQn/ax04M/p90eurfzkDMF13OxuTkn+ZaXBCLvMmf6F62tKs0wFpBK/npSmykFyzT02VMK/vLJAdBCI4t0hK0P8rrrpmmTn2KOmChIPXMjmI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763992977; c=relaxed/simple; bh=a33jXfKWV+tqd3DAXr4TASNxV2asp4jDlbK8KxdNQOQ=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=SQ29CCBdZQSBtlte5faD5LU+EUI/W7Mgsn0vzGb0EsL5rlO5MYHGM275bLVh7iwHCeHHqURbfAeD7GPRCSeizwroJq9I5NVTBRQuD2Coy0yHTdVMj42IsamMAEj4i6Ff/mb5qA4Vm4fpQsAivbDWbE07FhmO6aZGmcZUrwVafuY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=e/hgYIy5; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="e/hgYIy5" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DF81CC116C6; Mon, 24 Nov 2025 14:02:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1763992976; bh=a33jXfKWV+tqd3DAXr4TASNxV2asp4jDlbK8KxdNQOQ=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=e/hgYIy5IZoVv36JC+jRAqpdwANOi0RBMs4xIVOj7TdREitlfpOcNyp1ih6Wu+6o+ 2Q/Cq8TiwmjUPhTdVruO8tJx7Oo4SKI30Ev7qqnSXz8tGpSumZU/E8QiYk+RFrOpyd oXf/14nxkqp/kLTv4peMcyYcOdSH4bLmJnmbtspZdvLnO1CzdgnDG63+PeWfdDbjY6 D1/h34qRh0R4eVmBZwB8iY/7rCk/m2b48OA04YV2AnVQ4Y8fo4lxElUQnKQOfmgBS9 ORMBPLITDD4RodCl94oRW4fD5Syw1ax/SOHg7e2RHCr+EJJU6C3QMhogwIJ9kfYsdS eyryjhyrdkoOw== Date: Mon, 24 Nov 2025 15:02:51 +0100 From: Niklas Cassel To: Manivannan Sadhasivam Cc: Jingoo Han , Lorenzo Pieralisi , Krzysztof =?utf-8?Q?Wilczy=C5=84ski?= , Rob Herring , Bjorn Helgaas , Heiko Stuebner , Shawn Lin , FUKAUMI Naoki , Krishna chaitanya chundru , linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-arm-msm@vger.kernel.org Subject: Re: [PATCH 0/6] PCI: dwc: Revert Link Up IRQ support Message-ID: References: <20251111105100.869997-8-cassel@kernel.org> Precedence: bulk X-Mailing-List: linux-pci@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: On Mon, Nov 24, 2025 at 06:07:44PM +0530, Manivannan Sadhasivam wrote: > While I suggested to revert the link up IRQ patch for rockchip earlier, I didn't > expect to drop the support for Qcom. The reason is, on Qcom SoCs, we have not > seen a case where people connect a random PCIe switch and saw failures. Most of > the Qcom usecases were around the M.2 and other proprietary connectors. There is > only one in-house PCIe switch that is being actively used in our products, but > so far, none of the bootloaders have turned them ON before kernel booting. So > kernel relies on the newly merged pwrctrl driver to do the job. Even though it > also suffers from the same resource allocation issue, this series won't help in > any way as pwrctrl core performs rescan after the switch power ON, and by that > time, it will be very late anyway. > > So I'm happy to take the rockhip patches from this series as they fix the real > issue that people have reported. But once the pwrctrl rework series gets merged, > and the rockchip drivers support them, we can bring back the reverted changes. FUKAUMI Naoki, just to confirm: Neither my suggested approach: https://lore.kernel.org/linux-pci/aRHdeVCY3rRmxe80@ryzen/ nor Shawn's suggested approach: https://lore.kernel.org/linux-pci/dc932773-af5b-4af7-a0d0-8cc72dfbd3c7@rock-chips.com/ worked for you? If so, I don't see many alternative but for Mani to apply patch 1 and patch 2 from this series. Kind regards, Niklas