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

Huang Shijie
2011-08-02T06:19:56Z

Hi,
> On Fri, Jul 29, 2011 at 11:49 AM, Huang Shijie<b32955@freescale.com> wrote:
>> 于 2011年07月29日 15:40, Koen Beel 写道:
>>> 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.
>> Does it conflict with the GPMI?
> Well I don't know if it conflicts. From what Lothar says I assume
> there might be a conflict between gpmi and sdio.
Yes, the conflict between gpmi and other module(such as SD in MX6Q) is
THE prime reason
which caused the DMA timeout.

I am debuging the IMX6Q now, and meet the same problem.

> For now I see the same problem on both the evk (no sd/sdio card) and
> on my real target hardware (fixed sdio chip).
>
>>> Are you also testing on the mx23evk board? Really strange it is not
>>> reproducible here then.
>>> Anyone using mx23evk please give:
>> I tested the code in mx23evk.
>> After boot the kernel and login the shell, I met a problem:
>> the flash_eraseall can not run with the log:
>> "Floating point exception"
>> :(
>>
>>
>>> - revision number of board (I have tested on rev C1)
>> Revision number is C.
>>> - kernel parameter used (see previous mail for mine)
>>>
>> "console=ttyAMA0,115200 root=/dev/mmcblk0p1 rw rootwait gpmi_debug_init"
> You have a rootfs on an SD card? And gpmi is working? No conflicts on
I ever put the rootfs in the NAND. But I put the rootfs in the
SD card now.

The GPMI is working. No confilct on DMA now.
But I do not do much test on the NAND, such as bonnie++.
So it need to further test.

Best Regards
Huang Shijie
> dma or something?
> Have you hard coded the mtdparts in the init code? I pass something
> like "mtdparts=gpmi-nand:20m(boot),-(user)" as kernel parameter, but
> you don't...
>
>>
>> Best Regards
>> Huang Shijie
>>> Regards,
>>> Koen
>>>
>>>> Lothar Waßmann
>>>> --
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