From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pandora.armlinux.org.uk (pandora.armlinux.org.uk [78.32.30.218]) (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 D8B3724DD17 for ; Sat, 22 Nov 2025 09:57:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=78.32.30.218 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763805479; cv=none; b=dWopJYuuKECNm06KDZ4qRdkYasrclHGV0qBYKrI/Fmnswlkg5Q2AN9yH2yZGq4euzQyJc9jtGi/g1eiqB0IUgz53t2X5t3OnYjXEIfgKOYU5LML/1t+5VQ4MhkVWs7+HcxrC+FC+z1MxDZUW0vTrmGFRUzDgpNaG2vESW94cJoI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763805479; c=relaxed/simple; bh=tf1IU3EXfs02C8fkuQl+eOo+rB6khsrhsCEHB6ubD90=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=jYMVSuW9lrOq9JGGZjEGoXOoEyKF365+p0L/XSllcunoDyozq2AFuaVVZJfIbgwPlEhBz5IbCrbMQr6T5hXAqKO2rYH8SSgAk56fj6wxLCHvJ71SRkql8ctOJAc86gCpkKHBJ3d4jTrYlk8CIeEznTlgM4NgPciG6m8eKtkwuMw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=armlinux.org.uk; spf=none smtp.mailfrom=armlinux.org.uk; dkim=pass (2048-bit key) header.d=armlinux.org.uk header.i=@armlinux.org.uk header.b=KrbzvBi2; arc=none smtp.client-ip=78.32.30.218 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=armlinux.org.uk Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=armlinux.org.uk Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=armlinux.org.uk header.i=@armlinux.org.uk header.b="KrbzvBi2" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=Zvehfl65MP5JLPqg2Zeleos6p4Xa/AzMzTqiQPPMq/g=; b=KrbzvBi2JbmmW81oFDDegm1Qro /SHhZ7VyrTxtzbx6hq9qqaOOiRbC9HTyNp0za8yoqnTnunVWUW/2Hh1gB1sAhrBjrgJRWuHMCrzjQ bVoqA1Wzec0SC8GGyNeUou7NxNsTFzrLs4W3p1OfCgUvHdco0WKiNguGK+stk++ANbEORqUUlZXcK WvJfX6YdtfjQ1oatvSnTC8TJFbN4g/RWvELBrjk4HAnYAiMqNjsfeEywQUuYreimMKikXkQa1pWNt KtekbFMAfIing2ZR3lIM5PA7nI6kjPzJ4zGbIl+nn1mxFqViCdlsASagGjETEXTe6o8su532ZtaTu ytghGrjA==; Received: from shell.armlinux.org.uk ([fd8f:7570:feb6:1:5054:ff:fe00:4ec]:50242) by pandora.armlinux.org.uk with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.98.2) (envelope-from ) id 1vMkNL-000000008VD-3hPV; Sat, 22 Nov 2025 09:57:51 +0000 Received: from linux by shell.armlinux.org.uk with local (Exim 4.98.2) (envelope-from ) id 1vMkNJ-000000006EY-2EJT; Sat, 22 Nov 2025 09:57:49 +0000 Date: Sat, 22 Nov 2025 09:57:49 +0000 From: "Russell King (Oracle)" To: Laurent Pinchart Cc: Wei Fang , Clark Wang , Oleksij Rempel , Emanuele Ghidoli , "devicetree@vger.kernel.org" , "imx@lists.linux.dev" , "linux-arm-kernel@lists.infradead.org" , Daniel Scally , Kieran Bingham , Stefan Klug , Conor Dooley , Fabio Estevam , Krzysztof Kozlowski , Pengutronix Kernel Team , Rob Herring , Sascha Hauer , Shawn Guo Subject: Re: [PATCH] arm64: dts: imx8mp-debix-model-a: Disable EEE for 1000T Message-ID: References: <20251028071817.GX13023@pendragon.ideasonboard.com> <20251111235434.GA25874@pendragon.ideasonboard.com> <20251112222551.GB9135@pendragon.ideasonboard.com> <20251113010627.GC9135@pendragon.ideasonboard.com> <20251114222654.GI30434@pendragon.ideasonboard.com> <20251122072246.GA16239@pendragon.ideasonboard.com> Precedence: bulk X-Mailing-List: devicetree@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: <20251122072246.GA16239@pendragon.ideasonboard.com> Sender: Russell King (Oracle) On Sat, Nov 22, 2025 at 04:22:46PM +0900, Laurent Pinchart wrote: > Hello Wei, > > On Tue, Nov 18, 2025 at 01:50:55AM +0000, Wei Fang wrote: > > Sorry, I only have a little experience with DWMac, add Clark to help look > > at this issue. > > Thank you. > > I think we're getting close to having a good understanding of the > problem. I've debugged it as far as I could based on the information > available publicly. Let's try to get to the bottom of this issue, it > impacts quite a lot of people and it would be very nice to fix it > properly in mainline. > > The short summary is that I'm experiencing an interrupt storm on IRQ 135 > when EEE is enabled with the EQOS interface. > > My current theory is that > > - The lpi_intr_o signal of the EQOS is OR'ed into IRQ 135. > - The issue is triggerted by the PHY exiting LPI mode > - When it exits LPI mode, the PHY restarts generating the RX clock > (clk_rx_i). > - The MAC detects exit from LPI, and asserts lpi_intr_o. > - Before the CPU has time to process the interrupt, the PHY enters LPI > mode again, and stops generating the RX clock. > - The CPU processes the interrupt and reads the GMAC4_LPI_CTRL_STATUS > registers. This does not clear lpi_intr_o as there's no clk_rx_i. Please try setting STMMAC_FLAG_RX_CLK_RUNS_IN_LPI in dwmac-imx.c and see whether that changes the behaviour. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!