[PATCH v4] mmc: meson: Add driver for the SD/MMC host found on Amlogic MesonX SoCs

[Carlo Caione]

On Tue, Dec 8, 2015 at 9:35 PM, Ulf Hansson <ulf.hansson at linaro.org> wrote:

Hi Ulf,
(old thread, I know)

>> I have actually a problem and a question related to this value. On the
>> boards I'm currently using to test this driver I have no CD GPIO. In
>> this case do I have to specify the MMC as "non-removable"? Also if I
>
> "non-removable" is intended to be used for eMMC or other cards
> (SD/SDIO) that is not possible to remove/insert at runtime.
>
>> try to change an SD card at runtime I have to wait 3 times the timeout
>> before being able to do it successfully.
>
> I guess you are using the "broken-cd" binding, which will enable
> MMC_CAP_NEEDS_POLL and thus the mmc core will poll to detect cards
> being inserted or removed.

I still fail to see what the correct behaviour should be.
Using the v4 of this driver with a "broken-cd" binding and a timeout
of 10s my SD card takes 30s to be identified as removed after I take
it out from the SD slot.
Also, if I take it out and insert it again, I still have to wait 30s
to be able to access it again. Is this a limitation / bug of my driver
or is this the expected behaviour when we do not have a dedicated GPIO
for card detection?

Cheers,

-- 
Carlo Caione