Hi,
On Tue, Jul 21, 2020 at 1:26 PM Doug Anderson wrote:
>
> Hi,
>
> On Tue, Jul 21, 2020 at 11:55 AM Stephen Boyd wrote:
> >
> > Quoting Doug Anderson (2020-07-21 09:18:35)
> > > On Tue, Jul 21, 2020 at 12:08 AM Stephen Boyd wrote:
> > > >
> > > > Quoting Stephen Boyd (2020-07-20 22:59:14)
>
Hi,
On Tue, Jul 21, 2020 at 11:55 AM Stephen Boyd wrote:
>
> Quoting Doug Anderson (2020-07-21 09:18:35)
> > On Tue, Jul 21, 2020 at 12:08 AM Stephen Boyd wrote:
> > >
> > > Quoting Stephen Boyd (2020-07-20 22:59:14)
> > > >
> > > > I worry that we also need a dmb() here to make sure the dma
Quoting Doug Anderson (2020-07-21 09:18:35)
> On Tue, Jul 21, 2020 at 12:08 AM Stephen Boyd wrote:
> >
> > Quoting Stephen Boyd (2020-07-20 22:59:14)
> > >
> > > I worry that we also need a dmb() here to make sure the dma buffer is
> > > properly mapped before this write to the device is
Hi,
On Tue, Jul 21, 2020 at 12:08 AM Stephen Boyd wrote:
>
> Quoting Stephen Boyd (2020-07-20 22:59:14)
> >
> > I worry that we also need a dmb() here to make sure the dma buffer is
> > properly mapped before this write to the device is attempted. But it may
> > only matter to be before the
On 7/21/2020 12:37 PM, Stephen Boyd wrote:
Quoting Stephen Boyd (2020-07-20 22:59:14)
I worry that we also need a dmb() here to make sure the dma buffer is
properly mapped before this write to the device is attempted. But it may
only matter to be before the I2C_READ.
I'm suggesting this
On 7/21/2020 5:54 AM, Douglas Anderson wrote:
When I have KASAN enabled on my kernel and I start stressing the
touchscreen my system tends to hang. The touchscreen is one of the
only things that does a lot of big i2c transfers and ends up hitting
the DMA paths in the geni i2c driver. It
Quoting Stephen Boyd (2020-07-20 22:59:14)
>
> I worry that we also need a dmb() here to make sure the dma buffer is
> properly mapped before this write to the device is attempted. But it may
> only matter to be before the I2C_READ.
>
I'm suggesting this patch instead where we make
Quoting Douglas Anderson (2020-07-20 17:24:53)
> When I have KASAN enabled on my kernel and I start stressing the
> touchscreen my system tends to hang. The touchscreen is one of the
> only things that does a lot of big i2c transfers and ends up hitting
> the DMA paths in the geni i2c driver. It
On 2020-07-21 05:54, Douglas Anderson wrote:
When I have KASAN enabled on my kernel and I start stressing the
touchscreen my system tends to hang. The touchscreen is one of the
only things that does a lot of big i2c transfers and ends up hitting
the DMA paths in the geni i2c driver. It appears
When I have KASAN enabled on my kernel and I start stressing the
touchscreen my system tends to hang. The touchscreen is one of the
only things that does a lot of big i2c transfers and ends up hitting
the DMA paths in the geni i2c driver. It appears that KASAN adds
enough delay in my system to
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