Re: arm, am1808: using mmc1 controller and dma

[Heiko Schocher <hs@denx.de>]

Hello Juha,

Rajashekhara, Sudhakar wrote:
> 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@linux.davincidsp.com/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.

Juha, can you post this patch, or is it ok for you, if I post it
with your "Reported-by" and "Signed-off-by"?

bye,
Heiko
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