[PATCH v3] mmc: meson-gx: fix SDIO interrupt handling

[Peter Suti]

On Thu, Jan 19, 2023 at 8:37 PM Heiner Kallweit <hkallweit1 at gmail.com> wrote:
>
> > v1 and v2 also fix the issue, but v3 does not correct the bug when
> > WiFi is stressed for a longer time. And therefore it should not be
> > used.
> > Could you please give us some advice on how to investigate this further?
>
> One more thought:
> When checking device tree I found that my system uses IRQ_TYPE_LEVEL_HIGH
> for the SDIO interrupt. meson-g12-common.dtsi uses IRQ_TYPE_EDGE_RISING
> in mainline Linux, however vendor kernel uses IRQ_TYPE_LEVEL_HIGH
> in meson-g12-common.dtsi. A wrong interrupt trigger type may result in
> lost interrupts.
> So you could check which trigger type your system uses for the SDIO interrupt.
> If it's IRQ_TYPE_EDGE_RISING, re-test with IRQ_TYPE_LEVEL_HIGH.

Thank you for this suggestion, this change fixes the problem fully.
With the interrupt trigger type set to IRQ_TYPE_LEVEL_HIGH everything
works as expected even when WiFI is stressed for a long time.