[PATCH v4 00/16] ASoC: Add Audio Graph Card2 support

[Kuninori Morimoto]

Hi Mark

We already have Audio-Graph-Card which is Of-Graph base general sound
card driver. Basically it supports basic CPU-Codec connection, and is
also supporting DPCM connection. Because it was forcibly expanded to
DPCM, DT parsing is very limited and very difficult to add new features
on it, for example Multi-CPU/Codec support, Codec2Codec support, etc.

This patch adds more flexible new Audio-Graph-Card2 driver for it.
Audio-Graph-Card and Audio-Graph-Card2 are similar, but don't have
full compatibility.
The reason why I need Audio-Graph-Card2 instead of updating Audio-Graph-Card
is that it is very difficult to keep compatibility.

Audio-Graph-Card2 supports Normal/DPCM/Codec2Codec Connection wich
Single/Multi DAIs. And it is possible to Customizing.

This patch-set adds Audio-Graph-Card2 driver and its custom driver
sample, and DT settings sample which can be used for testing.

To enable testing/debuging, this patch-set also adds Test-Component
driver. We already have Dummy Component and/or Dummy DAI on soc-utils,
but 1) we can't use it from DT, 2) it do nothing.
Added new Test-Component can be used from DT, and it can indicate called
function name. We can use it to trace callback order, understanding
ALSA SoC behavior, etc, etc...
Sample DT settings of Audio Graph Card2 is using Test-Component as CPU/Codec DAI.

You can easily try to use/test it if you added below line to your DT file.
Your .config needs to have below CONFIGs to use/test it.
It will probe sample Sound Card which has Normal/DPCM/Multi/Codec2Codec
connections.

	#include "../../../../../sound/soc/generic/audio-graph-card2-custom-sample.dtsi"

	CONFIG_SND_AUDIO_GRAPH_CARD2
	CONFIG_SND_AUDIO_GRAPH_CARD2_CUSTOM_SAMPLE
	CONFIG_SND_TEST_COMPONENT

Because Audio Graph Card2 is still under experimental stage, it will
indicate such warning when probing, and the DT might be updated/exchanged.

It can use Codec2Codec, but it will start automatically when probed,
and can't stop it so far. It should be updated.

Link: https://lore.kernel.org/r/87k0xszlep.wl-kuninori.morimoto.gx@renesas.com
Link: https://lore.kernel.org/r/871r8u4s6q.wl-kuninori.morimoto.gx@renesas.com
Link: https://lore.kernel.org/r/87a6mhwyqn.wl-kuninori.morimoto.gx@renesas.com
Link: https://lore.kernel.org/r/87tuitusy4.wl-kuninori.morimoto.gx@renesas.com

v1 -> v2
	- don't use "port" base for_each loop

v2 -> v3
	- Rename audio-graph-card2 to rich-graph-card
	- Rename DSP to DPCM not to confuse
	- Normal/DPCM/Codec2Codec can use Single/Multi DAIs.
	- use dpcm/multi/codec2codec node instead of using extra compatible
	- Sample DTSI patch is separated to Single/Multi.

v3 -> v4
	- Rename rich-graph-card to audio-graph-card2
	- fixup custom sample driver's connection bug
	- test-component compatible uses "verbose" instead of "vv"

Kuninori Morimoto (16):
  ASoC: test-component: add Test Component YAML bindings
  ASoC: test-component: add Test Component for Sound debug/test
  ASoC: simple-card-utils: add asoc_graph_is_ports0()
  ASoC: simple-card-utils: add codec2codec support
  ASoC: add Audio Graph Card2 driver
  ASoC: audio-graph-card2: add Multi CPU/Codec support
  ASoC: audio-graph-card2: add DPCM support
  ASoC: audio-graph-card2: add Codec2Codec support
  ASoC: add Audio Graph Card2 Yaml Document
  ASoC: add Audio Graph Card2 Custom Sample
  ASoC: audio-graph-card2-custom-sample.dtsi: add Sample DT for Normal (Single)
  ASoC: audio-graph-card2-custom-sample.dtsi: add Sample DT for Normal (Nulti)
  ASoC: audio-graph-card2-custom-sample.dtsi: add DPCM sample (Single)
  ASoC: audio-graph-card2-custom-sample.dtsi: add DPCM sample (Multi)
  ASoC: audio-graph-card2-custom-sample.dtsi: add Codec2Codec sample (Single)
  ASoC: audio-graph-card2-custom-sample.dtsi: add Codec2Codec sample (Multi)

 .../bindings/sound/audio-graph-card2.yaml     |   57 +
 .../bindings/sound/test-component.yaml        |   33 +
 include/sound/graph_card.h                    |   21 +
 include/sound/simple_card_utils.h             |    4 +
 sound/soc/generic/Kconfig                     |   20 +
 sound/soc/generic/Makefile                    |    6 +
 .../generic/audio-graph-card2-custom-sample.c |  174 +++
 .../audio-graph-card2-custom-sample.dtsi      |  227 +++
 sound/soc/generic/audio-graph-card2.c         | 1281 +++++++++++++++++
 sound/soc/generic/simple-card-utils.c         |   46 +-
 sound/soc/generic/test-component.c            |  659 +++++++++
 11 files changed, 2527 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/devicetree/bindings/sound/audio-graph-card2.yaml
 create mode 100644 Documentation/devicetree/bindings/sound/test-component.yaml
 create mode 100644 sound/soc/generic/audio-graph-card2-custom-sample.c
 create mode 100644 sound/soc/generic/audio-graph-card2-custom-sample.dtsi
 create mode 100644 sound/soc/generic/audio-graph-card2.c
 create mode 100644 sound/soc/generic/test-component.c

-- 
2.25.1