[RFC PATCH 0/6] ASoC: fsl: add memory to memory function for ASRC

Shengjiu Wang
2024-08-06T10:47:41Z

This function is base on the accelerator implementation
for compress API:
https://patchwork.kernel.org/project/alsa-devel/patch/20240731083843.59911-1-perex@perex.cz/

Audio signal processing also has the requirement for memory to
memory similar as Video.

This asrc memory to memory (memory ->asrc->memory) case is a non
real time use case.

User fills the input buffer to the asrc module, after conversion, then asrc
sends back the output buffer to user. So it is not a traditional ALSA playback
and capture case.

Because we had implemented the "memory -> asrc ->i2s device-> codec"
use case in ALSA. Now the "memory->asrc->memory" needs
to reuse the code in asrc driver, so the patch 1 and patch 2 is for refining
the code to make it can be shared by the "memory->asrc->memory"
driver.

Other change is to add memory to memory support for two kinds of i.MX ASRC
modules.

Shengjiu Wang (6):
ALSA: compress: add Sample Rate Converter codec support
ASoC: fsl_asrc: define functions for memory to memory usage
ASoC: fsl_easrc: define functions for memory to memory usage
ASoC: fsl_asrc_m2m: Add memory to memory function
ASoC: fsl_asrc: register m2m platform device
ASoC: fsl_easrc: register m2m platform device

include/uapi/sound/compress_offload.h | 2 +
include/uapi/sound/compress_params.h | 9 +-
sound/soc/fsl/Kconfig | 1 +
sound/soc/fsl/Makefile | 2 +-
sound/soc/fsl/fsl_asrc.c | 176 +++++-
sound/soc/fsl/fsl_asrc.h | 2 +
sound/soc/fsl/fsl_asrc_common.h | 68 +++
sound/soc/fsl/fsl_asrc_m2m.c | 769 ++++++++++++++++++++++++++
sound/soc/fsl/fsl_easrc.c | 259 ++++++++-
sound/soc/fsl/fsl_easrc.h | 4 +
10 files changed, 1284 insertions(+), 8 deletions(-)
create mode 100644 sound/soc/fsl/fsl_asrc_m2m.c

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2.34.1