On Wed, May 3, 2017 at 12:05 PM, Benoît Thébaudeau <benoit@xxxxxxxxxxx> wrote:
> The eSDHC can only DMA from 32-bit-aligned addresses.
>
> This fixes the following test cases of mmc_test:
> 11: Badly aligned write
> 12: Badly aligned read
> 13: Badly aligned multi-block write
> 14: Badly aligned multi-block read
>
> Signed-off-by: Benoît Thébaudeau <benoit@xxxxxxxxxxx>
Is this the right description? I thought that SDHCI_QUIRK_32BIT_DMA_ADDR
was for devices that cannot address high memory above 0xffffffff, rather than
requiring a specific alignment.
If this is indeed an address range problem rather than an alignment problem,
are you sure it is the SD controller that is wrong here, rather than having a
64-bit DMA capable SDHCI connected to a 32-bit parent bus? In the
latter case, the dma-ranges property in the parent bus should limit
the addressing, not the device.
Arnd
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