2018-01-14 5:59 GMT+09:00 Wolfram Sang <wsa@xxxxxxxxxxxxx>:
>
>> I am talking about the card detection
>> by the IP-builtin circuit.
>
> Yes, I know. As I wrote in one of the previous patches when reviewing
> it, I disabled GPIO CD and used the internal mechanism (for tests where
> it is relevant). Like here, too.
>
>> - GPIO is not set up -> mmc_gpio_get_cd() returns -ENOSYS
>
> Thanks! That pointed me to the right direction. I missed that patch
> 10/22 was still under discussion and not applied to mmc/next, so I had
> to pick it manually.
>
> I can confirm now that there is an issue and your patch fixes it for the
> non-GPIO case. For the GPIO case, however, the TMIO_STAT_CARD_REMOVE |
> TMIO_STAT_CARD_INSERT interrupts are enabled now, too. It didn't harm
> when doing my tests, but we shouldn't do it, to be safe IMO.
>
Could you explain why?
_host->native_hotplug = !(mmc_can_gpio_cd(mmc) ||
mmc->caps & MMC_CAP_NEEDS_POLL ||
!mmc_card_is_removable(mmc));
For the GPIO case, mmc_can_gpio_cd(mmc) is 1,
so _host_>native_hogplug is 0.
Then, my code does nothing, doesn't it?
+ if (_host->native_hotplug)
+ tmio_mmc_enable_mmc_irqs(_host,
+ TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT);
--
Best Regards
Masahiro Yamada
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