From mboxrd@z Thu Jan 1 00:00:00 1970 From: will.deacon@arm.com (Will Deacon) Date: Mon, 8 Sep 2014 12:17:30 +0100 Subject: Unable to boot mainline on snow chromebook since 3.15 In-Reply-To: References: <20140905115704.GO13515@arm.com> <20140905122232.GP13515@arm.com> Message-ID: <20140908111730.GI26030@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi all, Sorry for the radio silence, the weekend happened :) On Fri, Sep 05, 2014 at 02:56:42PM +0100, Vivek Gautam wrote: > On Fri, Sep 5, 2014 at 7:16 PM, Ajay kumar wrote: > >>> I'd usually try to debug this a bit further, but without a console it's > >>> really painful to get anywhere. I've been working with 3.15, but now I'm > >>> having to backport patches when I want to test them, which is more effort > >>> than I can be bothered with. > >>> > >>> Is anybody else running mainline on this device and are these known/fixed > >>> problems? > > AFAIK, ARM chromebooks use DRM based display drivers and the required > > patches are still not merged: > > http://www.spinics.net/lists/dri-devel/msg66740.html > > > > Corresponding DT patches are also still not merged: > > http://www.spinics.net/lists/arm-kernel/msg358324.html > > http://www.spinics.net/lists/arm-kernel/msg358325.html > > > > There is a patch for configs as well: > > https://www.mail-archive.com/linux-samsung-soc at vger.kernel.org/msg35828.html > > > > Try these patches(I hope they will apply directly on 3.17-rc3) and you should > > be able to use display on snow. > > We have pushed 3.17-rc3 kernel with above mentioned patches to github [1] > Please use that, and in case you have some other requirements let us know. > > [1] https://github.com/exynos-reference/kernel/tree/exynos5-v3.17-rc3-display I can give these a go but, as Marc has pointed out, things *used* to work and it's a shame that I need to start carrying patches after vanilla 3.15 was usable. Will