Re: [v6 5/5] MMC: SDHCI AutoCMD23 support.

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Hi Andrei,

On Mon, May 23 2011, Andrei Warkentin wrote:
> Enables Auto-CMD23 support where available (SDHCI 3.0 controllers)
>
> Cc: arindam.nath@xxxxxxx
> Cc: cjb@xxxxxxxxxx
> Cc: arnd@xxxxxxxx
> Cc: subhashj@xxxxxxxxxxxxxx
> Cc: malchev@xxxxxxxxxx
> Tested-by: Arindam Nath <arindam.nath@xxxxxxx>
> Signed-off-by: Andrei Warkentin <andreiw@xxxxxxxxxxxx>

Looks like this patch is breaking boot on my XO-1.75/Marvell MMP2 A2
with SD 3.0 controller.  :/

[    1.217156] sdhci: Secure Digital Host Controller Interface driver
[    1.223361] sdhci: Copyright(c) Pierre Ossman
[    1.227793] mmc0: Auto-CMD23 available
[    1.227793] mmc0: no vmmc regulator found
[    1.242557] mmc0: SDHCI controller on MMC [sdhci-pxa.0] using DMA
[    1.248748] mmc1: Auto-CMD23 available
[    1.252479] mmc1: no vmmc regulator found
[    1.256599] mmc1: SDHCI controller on MMC [sdhci-pxa.1] using DMA
[    1.262694] mmc2: Auto-CMD23 available
[    1.266571] mmc2: no vmmc regulator found
[    1.270655] mmc2: SDHCI controller on MMC [sdhci-pxa.2] using DMA
[    1.656280] mmc1: new SDIO card at address 0001
[    2.423849] libertas: 20:7c:8f:4a:79:c5, fw 9.70.7p0, cap 0x000003a3
[    2.432951] libertas: wlan0: Marvell WLAN 802.11 adapter
[    2.438262] Waiting for root device /dev/mmcblk0p2...
[    2.528607] mmc2: new high speed DDR MMC card at address 0001
[    2.534597] mmcblk0: mmc2:0001 SEM04G 3.68 GiB
[    2.539198] mmcblk0boot0: mmc2:0001 SEM04G partition 1 1.00 MiB
[    2.545166] mmcblk0boot1: mmc2:0001 SEM04G partition 2 1.00 MiB
[    2.555985]  mmcblk0: unknown partition table
^^^^^
[    2.562610]  mmcblk0boot1: unknown partition table
[    2.569715]  mmcblk0boot0: unknown partition table
[    2.663264] VFS: Cannot open root device "mmcblk0p2" or unknown-block(179,2)

With the patch reverted, mmcblk0 comes up with partitions 1 and 2 and
mmcblk0p2 is mounted.  In this log, we fail to find a partition table
and panic.

Any ideas/suggestions?  I'm surprised that we enabled Auto-CMD23 on this
hardware; it is a v3 controller, but it has SDHCI_QUIRK_BROKEN_ADMA set..

Philip/Zhangfei, were you able to test this patch on MMP2?

Thanks,

- Chris.
-- 
Chris Ball   <cjb@xxxxxxxxxx>   <http://printf.net/>
One Laptop Per Child
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