Hello Hongbo, On Mon, Jan 12, 2015 at 11:51 AM, Hongbo Zhang <hongbo.zhang@xxxxxxxxxx> wrote: > On 9 January 2015 at 23:34, Javier Martinez Canillas >> >> Yes, please take a look to Marek series [0]. Keep in mind that the >> series does not support all sysmmu revisions so IOMMU is not supported >> for some SoCs (e.g: Exynos5). Support for that is planned once that >> series land into mainline though [1]. >> >> May I ask why are you interested in IOMMU support on Exynos? I'm >> asking because the reason why I tried to enable IOMMU support (and hit >> the same issue) was to try using the Exynos DRM HDMI driver with IOMMU >> since I found that HDMI is working on the downstream Samsung kernel >> [2] that has IOMMU support, but is not working on mainline. > > Because I am testing vfio-platform patches, IOMMU is used in this case. > http://www.spinics.net/lists/kvm-arm/msg12445.html > Ok, different use case then. > And I am glad to find a working kernel as you pointed out, then I Glad that you found the information useful. > found these two commits in this tree may solve my problem: > 841a7fe TEMP/TO POST: iommu: exynos: Add "mmu-masters" support > bd7e4c7 TEMP/TO POST: ARM: dts: add System MMU nodes of Exynos SoCs > >> Yes, that's what we cherry-picked as well to test HDMI since enabling IOMMU has a side effect of turning on the right power domains and enabling the needed clocks. Best regards, Javier -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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