From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kevin Hilman Subject: Re: [RFC PATCH 1/1] drm/exynos: Move platform drivers registration to module init Date: Wed, 19 Nov 2014 14:29:08 -0800 Message-ID: <7h1toyvn7v.fsf@deeprootsystems.com> References: <1416318821-7925-1-git-send-email-javier.martinez@collabora.co.uk> <7hh9xwxsev.fsf@deeprootsystems.com> <546CCAB8.9050402@collabora.co.uk> <7hbno3ufvx.fsf@deeprootsystems.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: Received: from mail-pa0-f46.google.com ([209.85.220.46]:33737 "EHLO mail-pa0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932428AbaKSW3L (ORCPT ); Wed, 19 Nov 2014 17:29:11 -0500 Received: by mail-pa0-f46.google.com with SMTP id lj1so1145392pab.33 for ; Wed, 19 Nov 2014 14:29:10 -0800 (PST) In-Reply-To: <7hbno3ufvx.fsf@deeprootsystems.com> (Kevin Hilman's message of "Wed, 19 Nov 2014 11:52:50 -0800") Sender: linux-samsung-soc-owner@vger.kernel.org List-Id: linux-samsung-soc@vger.kernel.org To: Javier Martinez Canillas Cc: Inki Dae , Andrzej Hajda , Krzysztof Kozlowski , dri-devel@lists.freedesktop.org, linux-samsung-soc@vger.kernel.org, Paolo Pisati , Vivek Gautam Kevin Hilman writes: > Javier Martinez Canillas writes: > >> [adding Paolo and Vivek as cc] >> >> Hello, >> >> On 11/18/2014 07:41 PM, Kevin Hilman wrote: >>> >>> It fixes the DRM deadlock, issue for me on exynos5800-peach-pi, but then >>> it proceeds to panic in the workqueue code called by the asoc max98090 >>> codec[1]. >>> >>> If I then disable CONFIG_SND_SOC_SNOW, I can get it to boot to a shell, >>> but I still don't have display output. >>> >> >> Paolo Pisati pointed out in another thread that he needed the patch >> "[PATCH v2 2/2] arm: dts: Exynos5: Use pmu_system_controller phandle for dp phy" >> is also needed to get display working for exynos on linux-next. >> >> I've pinged Kukjin to apply this as a -rc fix since is needed after >> a5ec598 ("phy: exynos-dp-video: Use syscon support to control pmu register") >> landed in 3.18 which broke the Exynos Display Port PHY: >> >> exynos-dp-video-phy 10040728.video-phy: Failed to lookup PMU regmap >> >> I've an Exynos5800 Peach Pi now so I wanted to test display on it. Just $subject >> and [0] should be enough to have display working on Peach Pi > > Yes, with those two patches, peach-pi display working on v3.18-rc5 for me. > >> with linux-next but >> it fails to me with: >> >> exynos-mipi-video-phy 10040714.video-phy: can't request region for resource [mem 0x10040714-0x1004071f] >> >> The same issue was reported by Paolo a couple of days ago [1]. > > For me, with linux-next, I'm still getting the DRM deadlock. Trying > your patch that moves things to module_init gets past the deadlock, but > still doesn't boot unless I disable CONFIG_SND_SOC_SNOW. Doing that I > see the same video-phy error though. Another interesting data point is that the 2 patches which get things working on v3.18-rc5, when applied on Kukjin's for-next branch, result in a kernel that boots (which is better than linux-next), but without a working display. :( Kevin