[U-Boot] [PATCHv2 00/10] mmc: code cleanup and support DDR mode

[Lukasz Majewski]

Hi Jaehoon,

> If card and host are supported DDR mode, then it can be used the DDR
> mode. This patch-set has dependency about beomho's patch-set.
> (Based-on u-boot-samsung repository)
> 
> http://patchwork.ozlabs.org/patch/331986/
> http://patchwork.ozlabs.org/patch/331987/
> http://patchwork.ozlabs.org/patch/331989/
> http://patchwork.ozlabs.org/patch/331988/
> 
> It's result for loading image.
> 
> sdhci controller ->5260488 bytes read in 259 ms (19.4 MiB/s)
> dwmmc controller without DDR mode -> 5260488 bytes read in 202 ms
> (24.8 MiB/s) dwmmc controller with DDR mode -> 5260488 bytes read in
> 118 ms (42.5 MiB/s)
> 
> Download the 400M image with lthor.
> sdhci controller -> 59.4sec (Avg 6.95 MB/s)
> dwmmc controller without DDR mode -> 61.6sec (Avg 6.72MB/s)
> dwmmc controller with DDR mode -> 60.4sec (Avg 6.85MB/s)

With downloading we aren't observing time improvement for downloading
the test image and flashing it, because of the time consuming crc32
calculation.

After applying the patch:
http://patchwork.ozlabs.org/patch/335223/

The time itself reduces significantly to less than 20 seconds.

In spite of the above I've tested this patch set on Trats2, so

Tested-by: Lukasz Majewski <l.majewski at samsung.com>
Acked-by: Lukasz Majewski <l.majewski at samsung.com>

-- 
Best regards,

Lukasz Majewski

Samsung R&D Institute Poland (SRPOL) | Linux Platform Group