Hi all,
On 25/07/2023 08:12, Shengjiu Wang wrote:
Audio signal processing has the requirement for memory to memory similar as Video.
This patch is to add this support in v4l2 framework, defined new buffer type V4L2_BUF_TYPE_AUDIO_CAPTURE and V4L2_BUF_TYPE_AUDIO_OUTPUT, defined new format v4l2_audio_format for audio case usage.
The created audio device is named "/dev/audioX".
And add memory to memory support for two kinds of i.MX ASRC module
Before I spend time on this: are the audio maintainers OK with doing this in V4L2?
I do want to have a clear statement on this as it is not something I can decide.
Regards,
Hans
changes in v2:
- decouple the implementation in v4l2 and ALSA
- implement the memory to memory driver as a platfrom driver and move it to driver/media
- move fsl_asrc_common.h to include/sound folder
Shengjiu Wang (7): ASoC: fsl_asrc: define functions for memory to memory usage ASoC: fsl_easrc: define functions for memory to memory usage ASoC: fsl_asrc: move fsl_asrc_common.h to include/sound media: v4l2: Add audio capture and output support media: imx: fsl_asrc: Add memory to memory driver ASoC: fsl_asrc: register m2m platform device ASoC: fsl_easrc: register m2m platform device
.../media/common/videobuf2/videobuf2-v4l2.c | 4 + drivers/media/platform/nxp/Kconfig | 12 + drivers/media/platform/nxp/Makefile | 1 + drivers/media/platform/nxp/fsl_asrc_m2m.c | 962 ++++++++++++++++++ drivers/media/v4l2-core/v4l2-dev.c | 17 + drivers/media/v4l2-core/v4l2-ioctl.c | 52 + include/media/v4l2-dev.h | 2 + include/media/v4l2-ioctl.h | 34 + .../fsl => include/sound}/fsl_asrc_common.h | 48 + include/uapi/linux/videodev2.h | 19 + sound/soc/fsl/fsl_asrc.c | 150 +++ sound/soc/fsl/fsl_asrc.h | 4 +- sound/soc/fsl/fsl_asrc_dma.c | 2 +- sound/soc/fsl/fsl_easrc.c | 227 +++++ sound/soc/fsl/fsl_easrc.h | 8 +- 15 files changed, 1539 insertions(+), 3 deletions(-) create mode 100644 drivers/media/platform/nxp/fsl_asrc_m2m.c rename {sound/soc/fsl => include/sound}/fsl_asrc_common.h (63%)