Hello Marek, On 05/24/2016 09:31 AM, Marek Szyprowski wrote: > This patch adds support for IOMMU to s5p-mfc device driver. MFC firmware > is limited and it cannot use the default configuration. If IOMMU is > available, the patch disables the default DMA address space > configuration and creates a new address space of size limited to 256M > and base address set to 0x20000000. > > For now the same address space is shared by both 'left' and 'right' > memory channels, because the DMA/IOMMU frameworks do not support > configuring them separately. This is not optimal, but besides limiting > total address space available has no other drawbacks (MFC firmware > supports 256M of address space per each channel). > > Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx> > --- Reviewed-by: Javier Martinez Canillas <javier@xxxxxxxxxxxxxxx> Tested-by: Javier Martinez Canillas <javier@xxxxxxxxxxxxxxx> Best regards, -- Javier Martinez Canillas Open Source Group Samsung Research America -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
