[PATCH v7 0/2] iommu/exynos: Add IOMMU/System MMU driver for Samsung Exynos

[KyongHo Cho]

On Tue, Dec 6, 2011 at 8:24 AM, Kyungmin Park <kmpark at infradead.org> wrote:
> On 12/6/11, Joerg Roedel <joerg.roedel at amd.com> wrote:
>> On Fri, Nov 18, 2011 at 06:47:28PM +0900, KyongHo Cho wrote:
>>> Patch Summary:
>>> [PATCH v7 1/2] ARM: EXYNOS: Change System MMU platform device definitions
>>> [PATCH v7 2/2] iommu/exynos: Add iommu driver for Exynos Platforms
>>
>> Okay, I merged it into arm/exynos, but it is not pushed yet. Actually
>> there were conflicts while merging, which I resolved. What I failed
>> to find is a config for Exynos that actually builds for upstream Linux.
>> Probably I havn't tried hard enough to find one... Can you provide a
>> kernel config that I can use for my testing and that builds a current
>> 3.2-rc4 kernel for Exynos?
> and I hope to see the real example how to use it with exynos platform.
>
> Now I can't find the interface between exynos platform and generic exynos iommu.
In "[PATCH v7 1/2] ARM: EXYNOS: Change System MMU platform device
definitions" patch,
you can find sysmmu_init().
It stores associations between a system MMU and a peripheral device in
platform data of platform device descriptor.
If Exynos IOMMU driver finds the association while probing, then the
driver can control the system MMU.

> BTW, how do you test it at mainline kernel?
>
I merged IOMMU mainline branch to our kernel branch and tested it with
our FIMC, MFC, JPEG, 2D.