Hi,
With this series AM335x and AM447x will use the dmaengine PCM for audio. The daVinci devices will keep using the davinci-pcm for now since I do not have means to test them but the code is written in a way that they can be switched to use the edma-pcm easily (DA850/OMAP-L138 has been tested and audio was working fine).
To be able to use the dmaengine PCM I needed to make changes to the edma code in arch/arm/common/ and in drivers/dma/ : Adding support for DMA pause/resume Possibility to select non default event queue/TC for cyclic (audio) dma channels: all devices using the eDMA via dmaengine was assigned to the default EQ/TC (mmc, i2c, spi, etc, and audio). This is not optimal from system performance point of view since sharing the same EQ/TC can cause latency spikes for cyclic channels (long DMA transfers for MMC for example).
While debugging the edma to get things sorted out I noticed that the debug was too verbose and the important information was hidden even when the we did not asked for verbose dmaengine debug. I have included some debug cleanups for the edma dmaengine driver also.
On the ASoC side: the series has been tested on AM335x and AM447x. I have report that DA850/OMAP-L138 works with this series (which boots w/o DT).
Regards, Peter --- Peter Ujfalusi (18): platform_data: edma: Be precise with the paRAM struct dma: edma: Add support for DMA_PAUSE/RESUME operation dma: edma: Set DMA_CYCLIC capability flag arm: common: edma: Select event queue 1 as default when booted with DT arm: common: edma: Save the number of event queues/TCs arm: common: edma: API to request non default queue for a channel DMA: edma: Use different eventq for cyclic channels dma: edma: Implement device_slave_caps callback dma: edma: Simplify direction configuration in edma_config_pset() dma: edma: Reduce debug print verbosity for non verbose debugging dma: edma: Prefix debug prints where the text were identical in prep callbacks dma: edma: Add channel number to debug prints dma: edma: Print the direction value as well when it is not supported ASoC: davinci: Add edma dmaengine platform driver ASoC: davinci-mcasp: Use dmaengine based platform driver for AM335x/447x ASoC: davinci-mcasp: Provide correct filter_data for dmaengine for non-DT boot ASoC: davinci-mcasp: Assign the dma_data earlier in dai_probe callback ASoC: davinci-mcasp: Place constraint on the period size based on FIFO config
arch/arm/common/edma.c | 34 ++++++++++++- drivers/dma/edma.c | 92 ++++++++++++++++++++++++++-------- include/linux/platform_data/edma.h | 20 ++++---- sound/soc/davinci/Kconfig | 1 + sound/soc/davinci/Makefile | 2 +- sound/soc/davinci/davinci-mcasp.c | 100 ++++++++++++++++++++++++++++++------- sound/soc/davinci/edma-pcm.c | 77 ++++++++++++++++++++++++++++ sound/soc/davinci/edma-pcm.h | 26 ++++++++++ 8 files changed, 303 insertions(+), 49 deletions(-) create mode 100644 sound/soc/davinci/edma-pcm.c create mode 100644 sound/soc/davinci/edma-pcm.h