[PATCH] spi: zynqmp_qspi: Workaround for small data cache issue

[Abbarapu, Venkatesh]

Hi Michal,

> -----Original Message-----
> From: Simek, Michal <michal.simek at amd.com>
> Sent: Thursday, September 14, 2023 7:34 PM
> To: Abbarapu, Venkatesh <venkatesh.abbarapu at amd.com>; u-
> boot at lists.denx.de
> Cc: jagan at amarulasolutions.com; git at xilinx.com; Ashok Reddy Soma
> <ashok.reddy.soma at amd.com>
> Subject: Re: [PATCH] spi: zynqmp_qspi: Workaround for small data cache
> issue
> 
> 
> 
> On 9/14/23 12:48, Venkatesh Yadav Abbarapu wrote:
> > Cache related issues are seen with small sized data reads.
> > Due to this, proper data is not read. Also some times sf probe fails
> > randomly. To workaround this issue, invalidate dcache after read DMA
> > is triggered.
> >
> > Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma at amd.com>
> > Signed-off-by: Venkatesh Yadav Abbarapu
> <venkatesh.abbarapu at amd.com>
> > ---
> >   drivers/spi/zynqmp_gqspi.c | 2 ++
> >   1 file changed, 2 insertions(+)
> >
> > diff --git a/drivers/spi/zynqmp_gqspi.c b/drivers/spi/zynqmp_gqspi.c
> > index a506d15227..ec59ef5804 100644
> > --- a/drivers/spi/zynqmp_gqspi.c
> > +++ b/drivers/spi/zynqmp_gqspi.c
> > @@ -707,6 +707,8 @@ static int zynqmp_qspi_start_dma(struct
> zynqmp_qspi_priv *priv,
> >   			return -ETIMEDOUT;
> >   		}
> >
> > +		invalidate_dcache_range(addr, addr + size);
> > +
> >   		writel(GQSPI_DMA_DST_I_STS_DONE, &dma_regs->dmaisr);
> >
> >   		debug("buf:0x%lx, rxbuf:0x%lx, *buf:0x%x len: 0x%x\n",
> 
> I got two patches. Which one is correct?
> Can you please send v2?

There are two patches. Will send v2 as series.

Thanks
Venkatesh
> 
> M