[MinnowBoard] Where is the MBM I2S driver in Linux

[li yuqian]

Hi Kevin,

2015-06-03 1:27 GMT+08:00 Strasser, Kevin <kevin.strasser at intel.com>:

> Hi Li,
>
> On 06/01/15 8:03 PM, li yuqian wrote:
> > check those driver, and i can understand there are three parts for the
> LPE
> > driver to working, special for the LPE firmware need to adde it. i can
> figure
> > it out in the
> >
> https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/tree/sound/soc/intel/sst-acpi.c?id=refs/tags/v4.0.4
> > line 249 and 250.
> >
> > but when i checked that sst-acpi.c, i found the baytrial sst is not
> support
> > the DMA data transfer, see the resindex_dma_base = -1 in line 262 and
> line 51
> > /* DMA only valid when resindex_dma_base != -1*/
> >
> > Am i correct? the MBM i2s does not support DMA data transfer?
>
> You are correct, the Bay Trail LPE driver does not use DMA. I think that
> is just
> a driver limitation, and does not necessarily indicate that the hardware
> isn't
> capable.
>
> Liam, can you provide any context here?
>
> Thanks,
> Kevin


Yes, i understand that hardware must be supported DMA. just wondering Will
intel release a new driver to make it use DMA for the data transfer as
without DMA it is useless. if will release, when will release?

thanks :)
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