From mboxrd@z Thu Jan 1 00:00:00 1970 From: Russell King - ARM Linux Subject: Re: [Bug] ARM: mxs: STI: console can't wake up from freeze Date: Mon, 31 Oct 2016 16:17:00 +0000 Message-ID: <20161031161700.GH1041@n2100.armlinux.org.uk> References: <315017958.66634.5d4fc19c-31cd-4900-8613-af4cadec5da4.open-xchange@email.1und1.de> <20161023133134.GI1041@n2100.armlinux.org.uk> <1709157673.85170.1cb53b4d-2805-48ea-aef1-dd282306d108.open-xchange@email.1und1.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from pandora.armlinux.org.uk ([78.32.30.218]:60712 "EHLO pandora.armlinux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933578AbcJaQRU (ORCPT ); Mon, 31 Oct 2016 12:17:20 -0400 Content-Disposition: inline In-Reply-To: <1709157673.85170.1cb53b4d-2805-48ea-aef1-dd282306d108.open-xchange@email.1und1.de> Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: Stefan Wahren Cc: "Rafael J. Wysocki" , Sascha Hauer , Shawn Guo , joerg.krause@embedded.rocks, Daniel Lezcano , linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Fabio Estevam On Sat, Oct 29, 2016 at 01:44:14PM +0200, Stefan Wahren wrote: > unfortunately not: > > Setting: no_console_suspend not in cmdline, Debug UART wakeup source enabled > > echo mem > /sys/power/state > > Result: Able to wakeup via Debug UART > Expected result: Able to wakeup via Debug UART > > --- > > Setting: no_console_suspend not in cmdline, Debug UART wakeup source enabled > > echo freeze > /sys/power/state > > Result: Unable to wakeup via Debug UART (no hung task warning) > Expected result: Able to wakeup via Debug UART Okay - I know that certain actions are bypassed when no_console_suspend is set, which has detrimental effects on some ARM platforms, so it was worth testing - iirc, working no_console_suspend is reliant on the boot loader re-setting up the serial port after its lost state. -- RMK's Patch system: http://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up according to speedtest.net.