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
--
1.9.0
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