Re: [PATCH] Disable the non working eMMC on Zoom2/3

[Tony Lindgren <tony@atomide.com>]

* Tony Lindgren <tony@atomide.com> [100427 11:16]:
> * Madhusudhan <madhu.cr@ti.com> [100408 10:07]:
> > > >
> > > > Tony, do you care to just look up the serial number of your board?
> > > 
> > > Sorry for the delay in replying, I've been travelling for a few weeks
> > > and been in meetings quite a bit. Anyways, it's a 1013037 REV A board,
> > > which seems to be production in the table above.
> > > 
> > 
> > That means we can not assume all production units have a working eMMC.
> > Would you mind sharing your bootup log? When this device is detected 
> > something like below is a clear issue.
> > 
> > mmcblk1: mmc1:0001 STM16G 1.00 GiB 
> > mmcblk1: p1 p2

For the eMMC I seem to have that:

[    0.978363] mmc1: new high speed MMC card at address 0001                    
[    0.984344] mmcblk1: mmc1:0001 STM16G 1.00 GiB                               
[    0.989105]  mmcblk1: unknown partition table
...

zoom:~# fdisk -l /dev/mmcblk1                                                   
[  120.306396] mmcblk1: retrying using single block read                        
[  120.503692] mmcblk1: retrying using single block read                        
[  120.683593] mmcblk1: error -110 transferring data, sector 2097144, nr 8, card status 0x900
[  120.691894] end_request: I/O error, dev mmcblk1, sector 2097144              
[  120.872680] mmcblk1: error -110 transferring data, sector 2097145, nr 7, card status 0x900
...
 
> Hmm, finally got around looking into this again. Looks like the mmc
> is now working on my zoom3 with the current Linus' tree at commit 
> 7c6bd2010fced38444c9fd658f4c6ce61bd185bf. So I guess something that
> we had in omap-fixes fixed this. Or maybe some fix for drivers/mmc?
> 
> This is with the debug_ll patch applied:
> 
> https://patchwork.kernel.org/patch/87532/

For the microSD card, turns out the card I used was flakey. So
that should explain some of the problems. I'm almost certain
I tried with two different cards earlier though. In any case,
let's assume the problem is only the eMMC.

Regards,

Tony