Re: [PATCH 08/18] spi: qup: Handle v1 dma completion differently

Andy Gross
2017-06-14T19:54:03Z

On Wed, Jun 14, 2017 at 12:45:51PM +0530, Sricharan R wrote:
> Hi Varada,
>
> On 6/14/2017 11:22 AM, Varadarajan Narayanan wrote:
> > Do not assign i/o completion callbacks while running
> > on v1 of QUP.
> >
> > Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
> > ---
> > drivers/spi/spi-qup.c | 5 +++--
> > 1 file changed, 3 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
> > index 7c22ee4..0f6a4c7 100644
> > --- a/drivers/spi/spi-qup.c
> > +++ b/drivers/spi/spi-qup.c
> > @@ -334,6 +334,7 @@ static int spi_qup_do_dma(struct spi_master *master, struct spi_transfer *xfer,
> > unsigned long timeout)
> > {
> > struct spi_qup *qup = spi_master_get_devdata(master);
> > + dma_async_tx_callback done = qup->qup_v1 ? NULL : spi_qup_dma_done;
> > int ret;
> >
> > /* before issuing the descriptors, set the QUP to run */
> > @@ -346,7 +347,7 @@ static int spi_qup_do_dma(struct spi_master *master, struct spi_transfer *xfer,
> >
> > if (xfer->rx_buf) {
> > ret = spi_qup_prep_sg(master, xfer, DMA_DEV_TO_MEM,
> > - spi_qup_dma_done, &qup->rxc);
> > + done, &qup->rxc);
> > if (ret)
> > return ret;
> >
> > @@ -355,7 +356,7 @@ static int spi_qup_do_dma(struct spi_master *master, struct spi_transfer *xfer,
> >
> > if (xfer->tx_buf) {
> > ret = spi_qup_prep_sg(master, xfer, DMA_MEM_TO_DEV,
> > - spi_qup_dma_done, &qup->txc);
> > + done, &qup->txc);
> > if (ret)
> > return ret;
> >
> >
>
> Not sure why we cannot use dma callback for V1 ?

V1 is for ADMA. V2+ is BAM. We only needed the callback for BAM

Regards,

Andy