Messages in this thread | | | Date | Tue, 28 Feb 2012 01:04:25 +0900 | Subject | Re: [PATCH v8 0/2] ommu/exynos: Add IOMMU/System MMU driver for Samsung Exynos | From | KyongHo Cho <> |
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On Tue, Feb 28, 2012 at 12:51 AM, Marek Szyprowski <m.szyprowski@samsung.com> wrote:
>> The next patch will be submitted by 2/28. > > Ok, I will check it soon then.
Thank you a lot.
>> The next IOMMU driver defines just one platform device for a H/W device. >> Thus, it defines just one SYSMMU_MFC platform device, for example. >> (the previous one defines 2 platform devices for SYSMMU_MFC) > > Exynos4210 has 2 iommu controllers for MFC device - one for each memory bus. > Each MFC bus can address 128MiB of IO address space. Do you mean that the new driver > will merge these 2 controllers into one? This way we will lose half of address space > for MFC device.
The situation seems somewhat different from our use of MFC. I also heard from Jungtae Park that it is better to define separate platform devices for the system MMUs of MFC.
Regards,
Cho KyongHo.
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