Messages in this thread | | | Date | Wed, 3 Jul 2013 09:33:59 +0800 | From | Bo Shen <> | Subject | Re: [alsa-devel] [PATCH 2/2] ASoC: atmel-pcm: use generic dmaengine framework |
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Hi Lars-Peter,
On 7/2/2013 23:34, Lars-Peter Clausen wrote: > On 07/02/2013 11:04 AM, Bo Shen wrote: > [...] >> -/*--------------------------------------------------------------------------*\ >> - * DMAENGINE operations >> -\*--------------------------------------------------------------------------*/ >> -static bool filter(struct dma_chan *chan, void *slave) >> -{ >> - struct at_dma_slave *sl = slave; >> - >> - if (sl->dma_dev == chan->device->dev) { >> - chan->private = sl; >> - return true; >> - } else { >> - return false; >> - } >> -} > > I'm wondering why is filtering no longer required?
Now this is handled by at_dma_filter in at_hdmac driver. More information, you can reference: <driver/dma/at_hdmac.c> file
> [...] >> + slave_config->dst_addr = (dma_addr_t)ssc->phybase + SSC_THR; > [...] >> + slave_config->src_addr = (dma_addr_t)ssc->phybase + SSC_RHR; > > Change the type of phybase to dma_addr_t
It should be: slave_config->dst_addr = (dma_addr_t)(ssc->phybase + SSC_THR); slave_config->src_addr = (dma_addr_t)(ssc->phybase + SSC_RHR);
> [...] >> } >> >> -static int atmel_pcm_dma_prepare(struct snd_pcm_substream *substream) >> -{ >> - struct snd_soc_pcm_runtime *rtd = substream->private_data; >> - struct atmel_pcm_dma_params *prtd; >> - >> - prtd = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream); >> - >> - ssc_writex(prtd->ssc->regs, SSC_IER, prtd->mask->ssc_error); >> - ssc_writex(prtd->ssc->regs, SSC_CR, prtd->mask->ssc_enable); > > These writes are also completely lost
This will be moved to DAI driver startup callback function.
>> - >> - return 0; >> -} > > I think it would also be good to get rid of any references to the ssc struct > from the DMA driver and move them over to the DAI driver.
I will try to implement this in next version patch.
Thanks.
> - Lars >
Best Regards, Bo Shen
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