Hi Mark Cc Laurent
These are v2 remain of Renesas sound DMA patches. [1/4] [2/4] were accepted, [3/4] [4/4] are not.
1) patch controls Audio-DMAC power. Current driver gets DMAEngile handle when .probe() timing, and release it on .remove() timing. But Audio-DMAC power ON/OFF are related to this timing. This means Audio-DMAC always ON Now. Basically, this kind of DMAC power control should be handled by DMAEngile, but current DMAEngile can't handle pm_runtime_xxx on atomic context. Because of this DMAEngile API issue, the *better* solution is get DMAEngile handle on every playback timing.
Kuninori Morimoto (2): 1) ASoC: rsnd: Request/Release DMA channel each time 2) ASoC: rsnd: use dma_sync_single_for_xxx() for IOMMU
sound/soc/sh/rcar/core.c | 4 +-- sound/soc/sh/rcar/dma.c | 266 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++------------------------------------------
Best regards --- Kuninori Morimoto