Adrian, On 27/12/18 1:32 PM, Chunyan Zhang wrote: > On Thu, 27 Dec 2018 at 15:44, Adrian Hunter <adrian.hunter@xxxxxxxxx> wrote: >> >> On 11/12/18 11:12 AM, Chunyan Zhang wrote: >>> Some standard SD host controllers can support both external dma >>> controllers as well as ADMA/SDMA in which the SD host controller >>> acts as DMA master. TI's omap controller is the case as an example. >>> >>> Currently the generic SDHCI code supports ADMA/SDMA integrated in >>> 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 an external DMA controller with SDHCI. >>> >>> Signed-off-by: Chunyan Zhang <zhang.chunyan@xxxxxxxxxx> >> >> FYI, I am waiting on successful testing before reviewing these patches again. > > Yeah, that makes sense, thanks Adrian! > > I intend to send out another new patchset after the holidays. > After had another look at omap_hsmmc, I knew something need to be > modified (emailed Faiz about this privately), but I was still not sure > if it can fix the problem Faiz found. > I am currently working on moving am335 and am43 devices from omap_hsmmc to sdhci-omap driver. External DMA would be an integral part of this. The plan is to post these patches as a part of my series after testing on all those devices. Thanks, Faiz
