From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kevin Hilman Subject: Re: Multiple issues with omap4 panda es in linux next Date: Thu, 25 Apr 2013 06:58:19 -0700 Message-ID: <87obd21zlw.fsf@linaro.org> References: <20130419171318.GK10155@atomide.com> <517181B2.9070302@ti.com> <20130419174454.GM10155@atomide.com> <517184A2.9020908@ti.com> <20130419181825.GN10155@atomide.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: Received: from mail-pd0-f179.google.com ([209.85.192.179]:34979 "EHLO mail-pd0-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758712Ab3DYN6X (ORCPT ); Thu, 25 Apr 2013 09:58:23 -0400 Received: by mail-pd0-f179.google.com with SMTP id x11so1821981pdj.38 for ; Thu, 25 Apr 2013 06:58:22 -0700 (PDT) In-Reply-To: <20130419181825.GN10155@atomide.com> (Tony Lindgren's message of "Fri, 19 Apr 2013 11:18:26 -0700") Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: Tony Lindgren Cc: Santosh Shilimkar , linux-omap@vger.kernel.org, Felipe Balbi , Tomi Valkeinen , Luciano Coelho , Roger Quadros , linux-arm-kernel@lists.infradead.org, Kishon Vijay Abraham I , Ravi Babu , Ruslan Bilovol Tony Lindgren writes: > * Santosh Shilimkar [130419 10:56]: >> On Friday 19 April 2013 11:14 PM, Tony Lindgren wrote: >> > * Santosh Shilimkar [130419 10:43]: >> >> On Friday 19 April 2013 10:43 PM, Tony Lindgren wrote: >> >>> Hi all, >> >>> >> >>> Here's a list of breakage I've noticed so far while trying to >> >>> use linux next on my pandaboard es. Probably similar issues exist >> >>> on other boards as well. >> >>> >> >>> Ideally we would not have any breakage by the merge window, so >> >>> let's try to get these fixed ASAP: >> >>> >> >>> 1. Serial console broken on panda es booting with DT >> >>> >> >>> The symptoms are dmesg output stopping after few lines >> >>> and only continuing after pressing a key. Does not seem to >> >>> happen on blaze with DT for some reason. And does not happen >> >>> on panda es with legacy booting. >> >>> >> >> This one is known and reported on list along with fix patches and >> >> later pull request [1]. >> >> >> >> Unfortunately with all the testing and everything and patches have >> >> been on the list for quite some time, feedback on one of the patch >> >> received was after pull request and then there was no further >> >> clarification. That series address the same exact issue you have >> >> mentioned above. >> > >> > OK thanks. I think Paul picked some of those and the plan was >> > to update the branch? Which one(s) should go into v3.10 as fixes? >> > >> Main in that series was to handle driver sysc handling withing hwmod >> layer and that is where the series got stuck [2]. Without that support >> other patches won't fix the issue. > > OK it seems that that is still ongoing discussion. For v3.10 we should > probably just disable PM for omap4 for DT booting so people can use > it for DT related development. Disabling PM (and even avoiding WFI using 'nohlt') will not fix this problem, since it's related to the idle-mode of the IP block itself. What fixes the problem is the series from Santosh for the SYSC removal. Santosh, it seems that series combined a fix for this problem with some cleanup of the hwmod code that Paul had some concerns with. Is there any chance you can split up that series into a fix targetted at the DT-boot UART problem and a feature cleanup for hwmod? Then we hopefully get this fix into v3.10-rc and work on the hwmod changes/cleanup for the following merge window. Kevin