RE: [PATCH] mmc: dw_mmc: Support predefined multiple block transfers.

Seungwon Jeon
2011-09-27T02:12:58Z

Andrei Warkentin wrote:
> Hi Seungwon,
>
> ----- Original Message -----
> > From: "Seungwon Jeon" <tgih.jun@samsung.com>
> > To: linux-mmc@vger.kernel.org
> > Cc: "Chris Ball" <cjb@laptop.org>, linux-samsung-soc@vger.kernel.org,
> "kgene kim" <kgene.kim@samsung.com>, "dh han"
> > <dh.han@samsung.com>, "Seungwon Jeon" <tgih.jun@samsung.com>
> > Sent: Monday, September 26, 2011 7:46:59 AM
> > Subject: [PATCH] mmc: dw_mmc: Support predefined multiple block
> transfers.
> >
> > This patch adds the support for predefined multiple block read/write.
> >
> > Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
>
> Without knowing much about dw_mmc host, your logic otherwise looks ok,
> given what
> I've previously done for SDHCI as far as CMD23/Auto-CMD23 enhancement.
> Just curious, what eMMC cards did you test this on, and what improvement
> did you see?

Thank you for review.
As you done, predefined transfer is required for reliable writes and eMMC4.5 feature.
Sadly, I didn't gain an improvement in my case.
(I don't know whether I can clarify the tested eMMC card, just one sample.)

Best regards,
Seungwon Jeon.

>
> Acked-by: Andrei Warkentin <andrey.warkentin@gmail.com>
>
> Thanks,
> A