From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joonyoung Shim Subject: Re: exynos5422-odroid-xu3: MCPM: only 6 of 8 CPUs coming online Date: Thu, 23 Oct 2014 10:36:25 +0900 Message-ID: <54485B99.2000703@samsung.com> References: <7133556.456161412823997169.JavaMail.weblogic@epml02> <7hzjd4lxc5.fsf@deeprootsystems.com> <54485433.2040008@samsung.com> <54485730.10803@samsung.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Return-path: Received: from mailout1.samsung.com ([203.254.224.24]:45611 "EHLO mailout1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750941AbaJWBgS (ORCPT ); Wed, 22 Oct 2014 21:36:18 -0400 Received: from epcpsbgr3.samsung.com (u143.gpu120.samsung.co.kr [203.254.230.143]) by mailout1.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0NDV005ZBJ4GTCD0@mailout1.samsung.com> for linux-samsung-soc@vger.kernel.org; Thu, 23 Oct 2014 10:36:16 +0900 (KST) In-reply-to: Sender: linux-samsung-soc-owner@vger.kernel.org List-Id: linux-samsung-soc@vger.kernel.org To: Mauro Ribeiro Cc: Kevin Hilman , "linux-samsung-soc@vger.kernel.org" , a.kesavan@samsung.com, k.chander@samsung.com, Mauro Ribeiro , abhijeet@abhijeet-dev.net, "kgene.kim@samsung.com >> Kukjin Kim" On 10/23/2014 10:25 AM, Mauro Ribeiro wrote: > Joonyoung, > > This patch was provided by Samsung and if someone can explain is you > guys from Samsung. > I have no idea of the logics behind this or what it would take to fix it. > Keep in mind that our u-boot and kernel (downstream 3.10) is part of > Samsung provided BSP. > Would be nice if you guys could explain this. > Mauro, Thanks to reply, do you know author of this patch written by Samsung? To Kukjin, The patch[1] seems to come from S.LSI guys, could you contact about this? [1]: https://github.com/abhijeet-dev/linux-samsung/commit/553b7f40465ab4fad6c270f289cd4780942f7fae > > > On Wed, Oct 22, 2014 at 11:17 PM, Joonyoung Shim > wrote: >> Add Cc the patch author and committer from github. >> >> On 10/23/2014 10:04 AM, Joonyoung Shim wrote: >>> Hi, >>> >>> On 10/17/2014 09:06 PM, Kevin Hilman wrote: >>>> On Wed, Oct 15, 2014 at 4:35 AM, Joonyoung Shim wrote: >>>>> Hi, >>>>> >>>>> Kevin Hilman kernel.org> writes: >>>>> >>>>>> >>>>>> Hi hdmi_resources_init, >>>>>> >>>>>> Abhilash Kesavan samsung.com> writes: >>>>>> >>>>>>> I had noticed a similar issue where only 6 cores would come up during >>>>>>> development on 5420. This was because there was a check in our u-boot >>>>>>> secondary boot-up path which would put a core into WFI if a flag was >>>>>>> not present and hence fail to boot. I wonder if it is the same >>>>>>> situation in your case too. >>>>>>> Is the u-boot for odroid-xu3 publically available or can you check if >>>>> there is any such code present in your >>>>>> secondary bring-up path. >>>>>> >>>>>> I'm using the hardkernel u-boot[1], branch: odroidxu3-v2012.07. I'm >>>>>> currently using the pre-built binaries that are in the >>>>>> sd_fuse/hardkernel directory of that branch, but I can rebuild u-boot if >>>>>> needed. >>>>>> >>>>>> I'm not very familiar with u-boot, but if f you have some pointers where >>>>>> to start looking in that code, that would be helpful. >>>>>> >>>>>> Kevin >>>>>> >>>>>> [1] https://github.com/hardkernel/u-boot.git >>>>>> >>>>>> >>>>> >>>>> It seems to need magic code. >>>>> >>>>> Please refer >>>>> https://github.com/abhijeet-dev/linux-samsung/commit/553b7f40465ab4fad6c270f289cd4780942f7fae >>>> >>>> Thanks, Abhilash had pointed me to the same code, and it works. But... >>>> >>>> Can someone explain this "magic", ideally in the form of a changelog >>>> and patch submitted upstream? >>>> >>> >>> I also really wonder. >>> >>> One more problem, cpu0 doesn't boot after offline and system is halted. >>> >>> # echo 0 > /sys/devices/system/cpu/cpu0/online >>> [ 28.027852] IRQ152 no longer affine to CPU0 >>> [ 28.028087] IRQ256 no longer affine to CPU0 >>> [ 28.028344] CPU0: shutdown >>> # >>> # echo 1 > /sys/devices/system/cpu/cpu0/online >>> >>> So, it's failed script[1] to test MCPM functionalities >>> >>> Thanks. >>> >>> [1]: http://www.spinics.net/lists/arm-kernel/msg330946.html >>> >> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html >