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

From: Koen Beel <koen.beel.barco@gmail.com>
To: "Lothar Waßmann" <LW@karo-electronics.de>
Cc: arnd@arndb.de, dedekind1@gmail.com,
	Wolfram Sang <w.sang@pengutronix.de>,
	Huang Shijie <b32955@freescale.com>,
	linux-mtd@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org, shijie8@gmail.com,
	Shawn Guo <shawn.guo@freescale.com>
Subject: Re: [PATCH v8 0/3] add the GPMI controller driver for IMX23/IMX28
Date: Fri, 29 Jul 2011 17:00:48 +0200	[thread overview]
Message-ID: <CAHMSPgPXnDVO630P9fnogQ0XvPSrwz0MYzXfXZLJoJNRf1gifA@mail.gmail.com> (raw)
In-Reply-To: <20018.43621.688990.319528@ipc1.ka-ro>

On Fri, Jul 29, 2011 at 2:41 PM, Lothar Waßmann <LW@karo-electronics.de> wrote:
> 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.

I have checked and the function dma_irq_callback is never called
during my tests. This means the DMA transfer does not even works once.

Also no clue here ...

>
>
> Lothar Waßmann
> --
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