Messages in this thread |  | | Date | Wed, 04 Mar 2015 09:50:14 +0100 | From | Marek Szyprowski <> | Subject | Re: [PATCH 1/1] ARM: exynos_defconfig: Disable IOMMU support |
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Hello,
On 2015-03-03 21:36, Kevin Hilman wrote: > Javier Martinez Canillas <javier.martinez@collabora.co.uk> writes: > >> Enabling Exynos DRM IOMMU support for Exynos is currently broken and >> causes a BUG on exynos-iommu driver. This was not an issue since the >> options was disabled in exynos_defconfig but after commit 8dcc14f82f06 >> ("drm/exynos: IOMMU support should not be selectable by user"), it is >> selected if EXYNOS_IOMMU is enabled which is in exynos_defconfig. >> >> So a kernel built using exynos_defconfig after the mentioned commit >> fails to boot [0]. Disable IOMMU support in Exynos defconfig until >> things get sorted out. > So some other exynos boards started failing in next-20150303[1], and > appear are DRM failures. > > Interestingly, (re)enabling CONFIG_EXYNOS_IOMMU for these cause things to > work again. Even more intersting, with IOMMU enabled, peach-pi is > > I'm starting to think it's the DRM driver that needs to be disabled > until it actually gets some testing, rathre than disabling IOMMU.
Well, this only shows that broken patch has been merged to exynos-drm-next kernel tree. I think that we should keep Exynos DRM enabled and give Exynos DRM developers a chance to fix their stuff and then test their stuff.
Best regards -- Marek Szyprowski, PhD Samsung R&D Institute Poland
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