[PATCH v6 25/25] ARM: dts: exynos: add iommu reserved regions for bootloader's splash screen

[Krzysztof Kozłowski]

2015-05-04 17:16 GMT+09:00 Marek Szyprowski <m.szyprowski at samsung.com>:
> Some bootloaders enable FIMD module and configure it as a simple
> framebuffer to display boot logo or splash screen before booting the
> kernel. Such framebuffer stays enabled until proper kernel driver gets
> probbed. Usually it is configured in such a way, that it performs DMA
> from the buffer located in system memory. To avoid IOMMU access fault
> during system boot, additional identity mapping between system memory
> and IO virtual address space must be created when IOMMU driver gets
> enabled.
>
> Signed-off-by: Marek Szyprowski <m.szyprowski at samsung.com>

Acked-by: Krzysztof Kozlowski <k.kozlowski at samsung.com>

Best regards,
Krzysztof