From mboxrd@z Thu Jan 1 00:00:00 1970 From: Javier Martinez Canillas Subject: Peach Pi/Pit boot failures in linux-next (was Re: [RFC PATCH 1/1] drm/exynos: Move platform drivers registration to module init) Date: Fri, 21 Nov 2014 14:03:51 +0100 Message-ID: <546F3837.5020706@collabora.co.uk> References: <1416318821-7925-1-git-send-email-javier.martinez@collabora.co.uk> <7hh9xwxsev.fsf@deeprootsystems.com> <546CCAB8.9050402@collabora.co.uk> <7hppchsu29.fsf@deeprootsystems.com> <546E293D.9000300@collabora.co.uk> <7hbno1spdt.fsf@deeprootsystems.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Return-path: Received: from bhuna.collabora.co.uk ([93.93.135.160]:34348 "EHLO bhuna.collabora.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755095AbaKUNEE (ORCPT ); Fri, 21 Nov 2014 08:04:04 -0500 In-Reply-To: <7hbno1spdt.fsf@deeprootsystems.com> Sender: linux-samsung-soc-owner@vger.kernel.org List-Id: linux-samsung-soc@vger.kernel.org To: Kevin Hilman Cc: Kukjin Kim , Vivek Gautam , Inki Dae , Andrzej Hajda , Krzysztof Kozlowski , "linux-samsung-soc@vger.kernel.org" , Paolo Pisati , Vivek Gautam [adding Kukjin as cc and dropping dri-devel] Hello Kevin, On 11/20/2014 07:22 PM, Kevin Hilman wrote: >> My kernel command line is almost the same with the difference that >> I'm using clk_ignore_unused and I just checked that not passing >> that parameter, makes linux-next to hang showing the same output >> log that Kevin reported. > > Ah! Good find. I confirm that adding clk_ignore_unused is getting > me booting again, but of course that is just masking a problem, so I > hope someone can shed light on which clock isn't being correctly > managed. > True, I'm renaming the thread subject to track these issues separately of the original Exynos DRM bug since these are unrelated. So, I see two different boot failures on the Peach Pi[t] Chromebooks: 1) next20141121 boot fails due snd-soc-snow Disabling CONFIG_SND_SOC_SNOW makes the boot to got a little further but still fails with the second issue: 2) next20141121 boot hangs if unused clocks are disabled. I tried to root cause these two issues but didn't see anything evident so I'll find a last known good commit and bisect. If anyone has an idea of the possible causes for these issues that would be appreciated. > Might I also suggest that folks have their default command-line to > *not* use clk_ignore_unused, since it's primary job is to workaround > clock bugs. > Agreed, I disabled now as well to catch regressions early. I carried those parameters from Snow since I needed clk_ignore_unused to have simplefb working on that machine. > Kevin > Best regards, Javier