> -----Original Message----- > From: Andy Shevchenko <andriy.shevche...@linux.intel.com> > Sent: 23 November 2020 6:23 PM > To: Sia, Jee Heng <jee.heng....@intel.com> > Cc: vk...@kernel.org; eugeniy.palt...@synopsys.com; > robh...@kernel.org; dmaeng...@vger.kernel.org; linux- > ker...@vger.kernel.org; devicet...@vger.kernel.org > Subject: Re: [PATCH v5 16/16] dmaengine: dw-axi-dmac: Virtually split > the linked-list > > On Mon, Nov 23, 2020 at 10:34:52AM +0800, Sia Jee Heng wrote: > > AxiDMA driver exposed the dma_set_max_seg_size() to the > DMAENGINE. > > It shall helps the DMA clients to create size-optimized linked-list > > for the controller. > > > > However, there are certain situations where DMA client might not be > > abled to benefit from the dma_get_max_seg_size() if the segment > size > > can't meet the nature of the DMA client's operation. > > > > In the case of ALSA operation, ALSA application and driver expecting > > to run in a period of larger than 10ms regardless of the bit depth. > > With this large period, there is a strong request to split the > > linked-list in the AxiDMA driver. > > I'm wondering why ASoC generic code can't use DMA channel and > device capabilities and prepare SG list with all limitations taken into > account. [>>] There is no further comment to split the linked-list in DMA, I assume we can proceed with this patch. [>>] The RFC patch is submitted at below link and you are in the thread. [>>] https://lore.kernel.org/alsa-devel/co1pr11mb5026545f07968dbc5386cf45da...@co1pr11mb5026.namprd11.prod.outlook.com/T/#u > > > -- > With Best Regards, > Andy Shevchenko >
