Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752017AbbD3QuK (ORCPT ); Thu, 30 Apr 2015 12:50:10 -0400 Received: from mail-oi0-f50.google.com ([209.85.218.50]:36163 "EHLO mail-oi0-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751990AbbD3QuF (ORCPT ); Thu, 30 Apr 2015 12:50:05 -0400 MIME-Version: 1.0 X-Originating-IP: [2620:0:1000:157d:59b5:7dd4:5c20:bbb] In-Reply-To: <55425AFB.8020904@collabora.co.uk> References: <1427471856-20918-1-git-send-email-k.kozlowski@samsung.com> <7h8udau9he.fsf@deeprootsystems.com> <7h8ud9pqmm.fsf@deeprootsystems.com> <55425AFB.8020904@collabora.co.uk> Date: Thu, 30 Apr 2015 09:50:03 -0700 Message-ID: Subject: Re: [RFT PATCH] drm/exynos: Enable DP clock to fix display on Exynos5250 and other From: Olof Johansson To: Javier Martinez Canillas Cc: Kevin Hilman , Krzysztof Kozlowski , "linux-fbdev@vger.kernel.org" , "linux-samsung-soc@vger.kernel.org" , Joonyoung Shim , David Airlie , Jingoo Han , Seung-Woo Kim , "linux-kernel@vger.kernel.org" , DRI mailing list , Inki Dae , Andrzej Hajda , Kyungmin Park , Kukjin Kim , stable , "linux-arm-kernel@lists.infradead.org" , Marek Szyprowski Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2753 Lines: 69 On Thu, Apr 30, 2015 at 9:40 AM, Javier Martinez Canillas wrote: > Hello Olof, > > On 04/30/2015 05:57 PM, Olof Johansson wrote: >> On Thu, Apr 30, 2015 at 8:44 AM, Kevin Hilman wrote: >>> Krzysztof Kozlowski writes: >>>>>> >>>>>> This should fix issue reported by Javier [1][2]. >>>>>> >>>>>> Tested on Chromebook Snow (Exynos 5250). More testing would be great, >>>>>> especially on other Exynos 5xxx products. >>>>> >>>>> I hoped to try this on my exynos5 boards, but it doesn't seem to apply >>>>> to linux-next or to Linus' master branch. >>>>> >>>>> Are there some other dependencies here? >>>> >>>> It is already applied: >>>> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1c363c7cccf64128087002b0779986ad16aff6dc >>> >>> Er, yup. That would explain it. ;) >>> >>> Sorry for the noise, >> >> Well, noise or not, Exynos is still broken in mainline and was broken >> on -next for so long in different ways that bisecting it is a futile >> exercise in frustration. >> >> It doesn't seem to show up with a trivial boot using only ramdisk, but >> when booting a real distro from disk, it certainly does. >> >> For example: >> >> http://arm-soc.lixom.net/bootlogs/mainline/v4.1-rc1-56-g3d99e3f/pi-arm-exynos_defconfig.html >> >> Disabling CONFIG_DRM makes it boot reliably. >> >> Arndale doesn't show it for me, but it also doesn't have working graphics. >> > > Both Exynos5250 and Exynos5420 had similar issues and $subject is the fix > for 5250 while 5420 is fixed by my "ARM: dts: Make DP a consumer of DISP1 > power domain on Exynos5420" patch that was posted a long time ago. I have > pinged Kukjin several times about this patch and he said that he will pick > it this weekend [0]. > > It is indeed very frustrating how many Exynos patches seems to be falling > through the crack, even important fixes like these ones that allow boards > to boot again. > > Kevin suggested that Krzysztof could collect and queue patches [1] to help > Kukjin and start acting as a co-maintatiner which I think it's a very good > idea and Krzysztof already did for some patches during the 4.1 cycle. Yes, that's a much needed improvement. I suggest starting out by collecting critical fixes like these, and we'd be happy to merge them directly if going through Kukjin will add latency. Krzysztof, if you can, make sure you get a PGP key setup and start collecting signatures from kernel developers. -Olof -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/