Messages in this thread | | | Date | Fri, 12 Jun 2020 01:08:17 -0700 | From | Nicolin Chen <> | Subject | Re: [RFC PATCH v3 3/4] ASoC: fsl_asrc_dma: Reuse the dma channel if available in Back-End |
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On Fri, Jun 12, 2020 at 03:37:50PM +0800, Shengjiu Wang wrote: > The dma channel has been requested by Back-End cpu dai driver already. > If fsl_asrc_dma requests dma chan with same dma:tx symlink, then > there will be below warning with SDMA. > > [ 48.174236] fsl-esai-dai 2024000.esai: Cannot create DMA dma:tx symlink > > So if we can reuse the dma channel of Back-End, then the issue can be > fixed. > > In order to get the dma channel which is already requested in Back-End. > we use the exported two functions (snd_soc_lookup_component_nolocked > and soc_component_to_pcm). If we can get the dma channel, then reuse it, > if can't, then request a new one. > > Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Reviewed-by: Nicolin Chen <nicoleotsuka@gmail.com>
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