Messages in this thread | | | From | Appana Durga Kedareswara Rao <> | Subject | RE: [PATCH v7 1/2] Documentation: DT: dma: Add Xilinx zynqmp dma device tree binding documentation | Date | Tue, 3 May 2016 09:12:24 +0000 |
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Hi Vinod,
> > PLEASE strip the crap from your MUA, better use a linux MUA
OK will fix Sorry for the noise...
> > > > >>>>> +- xlnx,include-sg : Indicates the controller to operate in simple > or > > >>>>> + scatter gather dma mode > > >>>>> +- xlnx,ratectrl : Scheduling interval in terms of clock cycles for > > >>>>> + source AXI transaction > > >>>>> +- xlnx,overfetch : Tells whether the channel is allowed to over > > >>>>> + fetch the data > > >>>>> +- xlnx,src-issue : Number of AXI outstanding transactions on source > > >>>> side > > >>>>> +- xlnx,src-burst-len : AXI length for data read. Support only power > of > > >>>>> + 2 byte values. > > >>>>> +- xlnx,dst-burst-len : AXI length for data write. Support only power > of > > >>>> > > >>>> These are all software runtime configuration parameters that you'd > > >>>> want to change at runtime depending on which peripheral you are > > >>>> targeting with a specific DMA transfer. These really do not belong into
> > Sorry, but that is just as broken. You need to derive those parameters from > > the DMA transfer as they are transfer specific. > > Right, for memcpy you should derive the parameters. Frankly burst size > and lengths, rate control should be set to maximun to achives best > performance on mecpy. People want memcpy to be done asap
Ok Will fix in the next version of the patch...
Regards, Kedar.
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