linux-kernel - [RFC PATCH v2 0/7] Add audio support in v4l2 framework

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Message-Id: <1690265540-25999-1-git-send-email-shengjiu.wang@nxp.com>
Date:   Tue, 25 Jul 2023 14:12:13 +0800
From:   Shengjiu Wang <shengjiu.wang@....com>
To:     hverkuil@...all.nl, sakari.ailus@....fi, tfiga@...omium.org,
        m.szyprowski@...sung.com, mchehab@...nel.org,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        shengjiu.wang@...il.com, Xiubo.Lee@...il.com, festevam@...il.com,
        nicoleotsuka@...il.com, lgirdwood@...il.com, broonie@...nel.org,
        perex@...ex.cz, tiwai@...e.com, alsa-devel@...a-project.org,
        linuxppc-dev@...ts.ozlabs.org
Subject: [RFC PATCH v2 0/7] Add audio support in v4l2 framework

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

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%)

-- 
2.34.1