linux_dsm_epyc7002/sound/soc/dwc/Kconfig
Jose Abreu 79361b2b98 ASoC: dwc: Add PIO PCM extension
A PCM extension was added to I2S driver so that audio
samples are transferred using PIO mode.

The PCM supports two channels @ 16 or 32 bits with rates
32k, 44.1k and 48k.

Although the mainline I2S driver uses ALSA DMA engine the
I2S controller can be built without DMA support, therefore
this is the reason why this extension was added.

Signed-off-by: Jose Abreu <joabreu@synopsys.com>
Cc: Carlos Palminha <palminha@synopsys.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Liam Girdwood <lgirdwood@gmail.com>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Alexey Brodkin <abrodkin@synopsys.com>
Cc: linux-snps-arc@lists.infradead.org
Cc: alsa-devel@alsa-project.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-06-13 17:52:00 +01:00

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config SND_DESIGNWARE_I2S
tristate "Synopsys I2S Device Driver"
depends on CLKDEV_LOOKUP
select SND_SOC_GENERIC_DMAENGINE_PCM
help
Say Y or M if you want to add support for I2S driver for
Synopsys desigwnware I2S device. The device supports upto
maximum of 8 channels each for play and record.
config SND_DESIGNWARE_PCM
tristate "PCM PIO extension for I2S driver"
depends on SND_DESIGNWARE_I2S
help
Say Y, M or N if you want to add a custom ALSA extension that registers
a PCM and uses PIO to transfer data.
This functionality is specially suited for I2S devices that don't have
DMA support.