RE: arm, am1808: using mmc1 controller and dma

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Hi,

On Fri, Dec 02, 2011 at 14:25:48, Heiko Schocher wrote:
> Hello Rajashekhara, Sudhakar,
> 
> Rajashekhara, Sudhakar wrote:
> > Hi,
> > 
> > On Fri, Dec 02, 2011 at 13:05:22, Heiko Schocher wrote:
> >> Hello,
> >>
> >> trying Linux 3.2.0-rc3 on an am1808 based board using MMCSD1 controller,
> >> and facing problems with using DMA. Deactivating use_dma=0 in the
> >> davinci_mmc controller and mmc works in pio mode without problems.
> >> So there are no hardware problems, pinmux is ok, psc are all on.
> >>
> > 
> > Please refer to the discussion at [1] where similar issue was discussed. Go through the

[...]

> 
> Yuhu! that works for me! But I had to fix it a little, because "edma_info"
> is now named "info". Here my diff:
> 

Yup, this patch was on an older version.

> diff --git a/arch/arm/mach-davinci/dma.c b/arch/arm/mach-davinci/dma.c
> index da90103..e10a251 100644
> --- a/arch/arm/mach-davinci/dma.c
> +++ b/arch/arm/mach-davinci/dma.c
> @@ -1513,7 +1513,7 @@ static int __init edma_probe(struct platform_device *pdev)
>                  * started by the codec engine will not cause audio defects.
>                  */
>                 for (i = 0; i < edma_cc[j]->num_channels; i++)
> -                       map_dmach_queue(j, i, EVENTQ_1);
> +                       map_dmach_queue(j, i, info[j]->default_queue);
> 
>                 queue_tc_mapping = info[j]->queue_tc_mapping;
>                 queue_priority_mapping = info[j]->queue_priority_mapping;
> 
> > [1] http://www.mail-archive.com/davinci-linux-open-source@xxxxxxxxxxxxxxxxxxxx/msg17926.html 
> 
> Do you prepare a patch, or should I send it?
> 

You can go ahead and submit the patch but Juha was the person who found out this issue.

Thanks,
Sudhakar
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