[Letux-kernel] omap_hsmmc RX DMA errors

[Adam Ford]

On Sun, Jan 8, 2023 at 11:58 PM Tony Lindgren <tony at atomide.com> wrote:
>
> Hi,
>
> * Adam Ford <aford173 at gmail.com> [230105 19:20]:
> > On Thu, Jan 5, 2023 at 1:08 PM Adam Ford <aford173 at gmail.com> wrote:
> > > On Thu, Jan 5, 2023 at 12:17 PM H. Nikolaus Schaller <hns at messlink.de> wrote:
> > > > Am 05.01.2023 um 18:54 schrieb Adam Ford <aford173 at gmail.com>:
> > > >
> > > > Would there be an objection if I migrate the OMAP3.dtsi file to the
> > > > newer driver?  I wasn't sure if there was a reason this family was
> > > > being held back from the newer driver.
> > > >
> > > >
> > > > AFAIR Tony wanted to retire the older driver anyways.
> > >
> > > That was my impression and it appears that the AM35x has already
> >
> > correction AM335x (not AM35x)
> >
> > > migrated to it.  I wasn't sure what was holding us back.  In theory,
> > > we could add the compatible flags to the new driver and mark them as
> > > deprecated so the new driver would work with older device trees if
> > > there was push-back on changing the device trees.  I know sometimes
> > > there are concerns about using older device trees and the interaction
> > > with the compatible flags make it a bit more complex.
>
> Things should be ready to flip the remaining SoCs to use sdhci so we
> should do that.

Do you want me to push a patch?  It might bring more clout if it comes
from you, but I don't mind. If so, how do we handle the backwards
compatibility stuff with older device trees?
>
> The only thing I'm aware of is that sdhci will try to keep probing
> also mmc instances that are not wired. So some board specific dts files
> may need to set some mmc instances with status = "disabled". Or maybe
> the sdhci driver can be configured to stop trying after some timeout.

I have not seen this as being an issue on the AM35 I have.

adam
>
> Regards,
>
> Tony