[lkml]   [2011]   [Sep]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [PATCH] dmaengine: add CSR SiRFprimaII DMAC driver
    On Thu, Sep 8, 2011 at 12:06 PM, Barry Song <> wrote:
    > 2011/9/8 Jassi Brar <>:
    >> According to figures, {xlen > width} is to be set _only_ when a transfer
    >> is divided into _exactly_ two chunks separated by gap _exactly_
    >> equal to length of the second chunk (an extremely rare case).
    > Sorry i didn't list related full information in datasheet in my early reply.
    > we don't have the case of xlen > dma_width.
    Then the dmac driver becomes even simpler.
    Accept strictly 'rectangular' requests and reject every other.

    >> Anyways, every case can be easily expressed using the generic api
    >> I proposed. See 'struct xfer_template' in
    > i think it is the interleaved DMA case and there is a
    > inter-chunk-gap(ICG) between every chunk while dma_width > xlen,
    > then your new generic API can definitely cover this case.
    Yup, it does. Thanks for confirming.

     \ /
      Last update: 2011-09-08 09:51    [W:0.018 / U:173.080 seconds]
    ©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site