[U-Boot] Issue in DWMMC in mainline

[U-Boot] Issue in DWMMC in mainline

[Rajeshwari Birje]

Hi All,

I use the DWMMC driver in u-boot mainline on exynos board and face the
following issue.

I do a mmc rescan 3 times, then fourth time I get a DATA ERROR, which
is due to FIFO underun/overun, after which I don't even get Command
done interrupt.
Later on the mmcinfo value also is displayed wrong.

Please do let me know if anybody have a solution for same.
-- 
Thanks and Regards,
Rajeshwari Shinde

[U-Boot] Issue in DWMMC in mainline

[Jagan Teki]

Hi,

On Tue, May 21, 2013 at 6:24 PM, Rajeshwari Birje
<rajeshwari.birje@gmail.com> wrote:
> Hi All,
>
> I use the DWMMC driver in u-boot mainline on exynos board and face the
> following issue.
>
> I do a mmc rescan 3 times, then fourth time I get a DATA ERROR, which
> is due to FIFO underun/overun, after which I don't even get Command
> done interrupt.
> Later on the mmcinfo value also is displayed wrong.
>
> Please do let me know if anybody have a solution for same.

You may know it already, can you try by enable CONFIG_MMC_TRACE on board config.
so-that at-least we may come to know on which CMD this over/underrun occur.

Thanks,
Jagan.

[U-Boot] Issue in DWMMC in mainline

[Jaehoon Chung]

Hi

On 05/21/2013 10:51 PM, Jagan Teki wrote:
> Hi,
> 
> On Tue, May 21, 2013 at 6:24 PM, Rajeshwari Birje
> <rajeshwari.birje@gmail.com> wrote:
>> Hi All,
>>
>> I use the DWMMC driver in u-boot mainline on exynos board and face the
>> following issue.
>>
>> I do a mmc rescan 3 times, then fourth time I get a DATA ERROR, which
>> is due to FIFO underun/overun, after which I don't even get Command
>> done interrupt.
>> Later on the mmcinfo value also is displayed wrong.
>>
>> Please do let me know if anybody have a solution for same.
> 
> You may know it already, can you try by enable CONFIG_MMC_TRACE on board config.
> so-that at-least we may come to know on which CMD this over/underrun occur.
If CONFIG_MMC_TRACE is enabled, the we can know which command is occurred.
But it's added the some delay, because the log message is displayed.
Then it didn't work the expected job.

Best Regards,
Jaehoon Chung 
> 
> Thanks,
> Jagan.
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