From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kukjin Kim Subject: Re: [PATCH v7 00/25] Exynos SYSMMU (IOMMU) integration with DT andDMA-mapping subsystem Date: Sat, 23 May 2015 12:56:20 +0900 Message-ID: <555FFA64.6030709@kernel.org> References: <1432041645-11172-1-git-send-email-m.szyprowski@samsung.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Return-path: Received: from mail.kernel.org ([198.145.29.136]:41115 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1946089AbbEWD4d (ORCPT ); Fri, 22 May 2015 23:56:33 -0400 In-Reply-To: Sender: linux-samsung-soc-owner@vger.kernel.org List-Id: linux-samsung-soc@vger.kernel.org To: Javier Martinez Canillas Cc: Marek Szyprowski , "iommu@lists.linux-foundation.org" , "linux-samsung-soc@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , linaro-mm-sig@lists.linaro.org, Arnd Bergmann , Shaik Ameer Basha , Cho KyongHo , Joerg Roedel , Thierry Reding , Olof Johansson , Laurent Pinchart , Rob Herring , Will Deacon , David Wodhouse , Inki Dae , Kukjin Kim , Tomasz Figa , Kyungmin Park , Joonyoung Shim , Seung-Woo On 05/20/15 16:31, Javier Martinez Canillas wrote: > Hello Marek, > > On Tue, May 19, 2015 at 3:20 PM, Marek Szyprowski > wrote: >> Hello Everyone, >> >> This is yet another attempt to get Exynos SYSMMU driver with integrated >> with IOMMU & DMA-mapping subsystems. This version includes minor fixes >> suggested by Joerg Roedel, Cho KyongHo and Robin Murphy. >> >> All patches are also available in the following git repository: >> https://git.linaro.org/people/marek.szyprowski/linux-srpol.git >> branch v4.1-exynos-iommu-v7. >> >> My plan for merging this patchset is as follows: >> - DTS changes and power domain changes should go via Samsung tree to avoid >> conflicts with other pending DTS patches >> - all exynos-iommu patches and dma-mapping/reserved iommu region should go >> via IOMMU tree, >> - all Exynos DRM patches should go via DRM/Exynos tree. >> >> There are no build cross-subsystem dependencies and IOMMU on Exynos is >> already nonfunctional (and disabled in defconfig), so merging patches in >> parts doesn't break anything. >> >> There are knowns issues with Exynos DRM driver and IOMMU support >> (i.e. Xorg freeze reported by Javier Martinez Canillas: >> http://www.spinics.net/lists/linux-samsung-soc/msg44350.html ). They >> will be handled by a separate fixes to Exynos DRM drivers. This patchset >> fixes only those issues in Exynos DRM FIMD driver, which prevents >> booting to console. >> > > I tested your v7 using exynos_defconfig + CONFIG_EXYNOS_IOMMU on both > Exynos5250 Snow and Exynos5420 Peach Pit Chromebooks. > > I can only reproduce the complete system hang on Xorg if I use the > xf86-video-armsoc DDX. If I use the -fbdev DDX instead, X starts > correctly and the system does not freeze. Also, this only happens on > Exynos5420 Peach Pit, Exynos5250 Snow is working correctly even when > using the -armsoc DDX. > > So as you said, this is a separate issue with the Exynos DRM driver > IOMMU support and is not related to your series. For the whole series: > > Tested-by: Javier Martinez Canillas > Thanks for your test on the boards. I'll sort out the arch/ side changes into samsung tree in this weekend. - Kukjin