Re: [PATCH v2 0/3] Add support for using external dma in SDHCI

[Faiz Abbas <faiz_abbas@ti.com>]

Hi Chunyan,

On 12/11/18 12:56 PM, Chunyan Zhang wrote:
> Currently the generic SDHCI code in the Linux kernel supports the SD
> standard DMA integrated into the host controller but does not have any
> support for external DMA controllers implemented using dmaengine meaning
> that custom code is needed for any systems that use a generic DMA
> controller with SDHCI which in practice means any SDHCI controller that
> doesn't have an integrated DMA controller so we should have this as a
> generic feature.
> 
> There are already a number of controller specific drivers that have dmaengine
> code, and some could use sdhci.c actually, but needed to implement mmc_ops->request()
> in their specific driver for sending command with external dma using dmaengine
> framework, with this patchset, them will take advantage of the generic support.
> TI's omap controller is the case as an example.
> 
> Any comments are very appreciated.
> 

This is great. It helps us move am335x and am43xx platforms to
sdhci-omap. What platforms have you tested this on?

Thanks,
Faiz