On Wed, Jun 24, 2015 at 05:12:12PM +0000, Appana Durga Kedareswara Rao wrote:
Please *fix* you MUA to wrap lines properly
> > > +
> > > + if (cfg->reset)
> > > + return xilinx_cdma_chan_reset(chan);
> > Why do you want to reset this externally, that sounds bad to me
> If someone (client driver) want to reset the controller externally. It will
> be useful right?
And why would they want to do that? There might be some other clients using
other channels, doesnt sound good design to me. What is the motivation
here...
>
>
> >
> > > +
> > > + if (cfg->coalesc <= XILINX_CDMA_COALESCE_MAX) {
> > > + reg &= ~XILINX_CDMA_XR_COALESCE_MASK;
> > > + reg |= cfg->coalesc << XILINX_CDMA_COALESCE_SHIFT;
> > > + }
> > Can you explain what coalesc means here?
>
> Coalesc means interrupt threshold
> This value is used for setting the interrupt threshold. When IOC (interrupt
> on complete) interrupt events occur, an internal counter
> Counts down from the Interrupt Threshold setting. When the count reaches
> zero, an interrupt out is generated by the DMA engine.
> This will be useful in case of SG transfer.
IIUC, on IOC controller will count this threshold and then generate
interrupt out?
>
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Thats cute!
--
~Vinod
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