[U-Boot] [PATCH 0/2] Improve Raspberry Pi mmc writes.

[Jaehoon Chung]

On 2017년 04월 08일 03:33, Alex Deymo wrote:
> 2017-04-06 21:53 GMT-07:00 Jaehoon Chung <jh80.chung at samsung.com>:
> 
>> On 04/02/2017 03:58 PM, Alex Deymo wrote:
>>> When experimenting with fastboot from U-Boot on the Raspberry Pi 3 we
>>> found that the writes to the sdcard are much more slow than when
>>> accessing it from the userspace. These two patches speed up the write
>>> and allow us to reliably write the sdcard from U-Boot.
>>
>>
>> I'm not sure you can see this email.
>> If you can't receive this, I will resend with my gmail account.
>>
> I can, I'm on the list. If you cc me directly the chances of me seeing it
> are much higher.

Sorry for sending directly. I have some problem for sending with Samsung account.

> 
> 
> I want to know the situation after removing the BROKEN_R1B quirks.

Refer to below patches..already applied.

https://patchwork.ozlabs.org/patch/647364/
https://patchwork.ozlabs.org/patch/647365/

Exynos boards what used the sdhci controller were very slow before removing BROKEN_R1B.
When i posted the BROKEN_R1B, it was too old..I think this quirk doesn't need anymore.
But i can't test other boards what used this quirks.

If you can test it..it's helpful to me. 

>>
> 
> How would I test that?
> Basically trying to write 100s of MB to mmc on the rpi3 was failing very
> often after applying the "Speed up mmc writes" patch. Without said patch
> this was not a problem because the write were sooooooo slow that we would
> never send two write commands too close to each other. Do you want me
> re-test applying only "Speed up mmc writes." on top of master without the
> second patch (Wait for SDHCI_INT_DATA_END when transferring)? Or just
> re-test the mmc speed/reliability without neither of these patches?
> deymo
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