Re: [PATCH v8 0/3] add the GPMI controller driver for IMX23/IMX28

Lothar Waßmann
2011-07-29T12:41:09Z

Hi,

Koen Beel writes:
> Hi,
>
> On Fri, Jul 29, 2011 at 9:20 AM, Lothar Waßmann <LW@karo-electronics.de> wrote:
> > Hi,
> >
> > Koen Beel writes:
> >> Hi,
> >>
> >> I have test on mx23evk board. Still see the same issues.
> >>
> >> On Wed, Jul 27, 2011 at 3:53 AM, Huang Shijie <b32955@freescale.com> wrote:
> >> > Hi,
> >> >
> >> > Thanks for your test.
> >> >
> >> >> Hi,
> >> >>
> >> >> It's not really working for me.
> >> >> I've applied all gpmi-nand driver patches and the dma driver patches.
> >> >>
> >> >> I have added following kernel parameters:
> >> >> mtdparts=gpmi-nand:20m(boot),-(user) ubi.mtd=1 root=ubi0:rootfs0
> >> >> rootfstype=ubifs gpmi_debug_init
> >> >>
> >> >> During boot I get already get DMA timeout:
> >> >> [    2.560000] [ start_dma_without_bch_irq : 392 ] DMA timeout, last DMA
> >> >> :1
> >> >> [    3.560000] [ start_dma_with_bch_irq : 427 ] bch timeout!!!
> >> >> ...
> >> >> (see log file in attach line 89)
> >>
> >> I still see this DMA timeout when booting.
> >> What kernel parameters do you use? I still use same as above.
> >>
> > Do you have an SD card in the system? I'm getting the same error when
> > accessing an SD card. Without SD card I can use the flash without any
> > errors.
>
> No SD card in the system. At least not on my mx23evk board.
> My real target hardware has a SDIO wifi chip.
>
> Are you also testing on the mx23evk board? Really strange it is not
> reproducible here then.
> Anyone using mx23evk please give:
> - revision number of board (I have tested on rev C1)
> - kernel parameter used (see previous mail for mine)
>
It's getting ever more strange. I only have problems with concurrent
access to the flash and SD-card when I do file system based accessed
to the SD card.
A 'dd if=/dev/mmcblk0 of=/dev/null' while excessively using the flash
works well, while mounting the SD card and doing an 'ls' produces
immediate BCH DMA timeouts.

Perhaps someone can make anything out of that.

Lothar Waßmann
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