[v3,00/13] Audio graph card updates and usage with Tegra210 audio

Summary of changes:
 * Support multiple instances of a component. For example there can be
   multiple I2S devices which can use the same component driver.

 * Support open platforms with empty Codec endpoint. Customers can plug
   their own HW and can populate codec endpoint.

 * In a component model there can be many components which can be
   connected togethe. In such cases Identify no-pcm DPCM DAI links which
   can be used in BE<->BE connections.

 * Add Tegra audio graph driver which is based on generic audio graph
   driver and specific customizations are done in Tegra driver.

 * This pushes DT support for Tegra210 based platforms which uses
   audio-graph card and above enhancements.

The series is based on following references where DPCM usgae for Tegra
Audio and simple-card driver proposal were discussed.

 * https://lkml.org/lkml/2020/4/30/519 (DPCM for Tegra)
 * https://lkml.org/lkml/2020/6/27/4 (simple-card driver)

Changelog
=========

v1 -> v2
--------
 * Re-organized ports/endpoints description for ADMAIF and XBAR.
   Updated DT patches accordingly.
 * After above change, multiple Codec endpoint support is not
   required and hence dropped for now. This will be considered
   separately if at all required in future.
 * Re-ordered patches in the series.


v2 -> v3
--------
 * Dropped new compatible addition in generic graph driver
   after reviewing it with Morimoto-san. Instead added Tegra
   audio graph driver and new compatibles are added in the same.
 * Added new patches to expose new members for customization
   in audio graph driver.
 * Added new patch for Tegra audio graph driver and related
   documentation.
 * Minor change in below commit where mutex version of helper is used
   "ASoC: audio-graph: Identify 'no_pcm' DAI links for DPCM"
 * DT binding is updated to use the newly exposed compatibles
 * No changes in other patches


Sameer Pujar (13):
  ASoC: soc-core: Fix component name_prefix parsing
  ASoC: soc-pcm: Get all BEs along DAPM path
  ASoC: audio-graph: Use of_node and DAI for DPCM DAI link names
  ASoC: audio-graph: Identify 'no_pcm' DAI links for DPCM
  ASoC: audio-graph: Support empty Codec endpoint
  ASoC: simple-card-utils: Expose new members for asoc_simple_priv
  ASoC: audio-graph: Update driver as per new exposed members
  ASoC: audio-graph: Expose helpers from audio graph
  ASoC: dt-bindings: tegra: Add schema for audio graph card
  ASoC: tegra: Add audio graph based card driver
  arm64: defconfig: Enable Tegra audio graph card driver
  arm64: tegra: Audio graph header for Tegra210
  arm64: tegra: Audio graph sound card for Jetson Nano and TX1

 .../sound/nvidia,tegra-audio-graph-card.yaml       |  67 +++++
 .../boot/dts/nvidia/tegra210-audio-graph.dtsi      | 138 ++++++++++
 arch/arm64/boot/dts/nvidia/tegra210-p2371-2180.dts | 219 ++++++++++++++++
 arch/arm64/boot/dts/nvidia/tegra210-p3450-0000.dts | 124 +++++++++
 arch/arm64/configs/defconfig                       |   1 +
 include/sound/graph_card.h                         |  19 ++
 include/sound/simple_card_utils.h                  |   4 +
 include/sound/soc.h                                |   1 +
 sound/soc/generic/audio-graph-card.c               |  92 +++++--
 sound/soc/soc-core.c                               |   3 +-
 sound/soc/soc-pcm.c                                |   3 +-
 sound/soc/tegra/Kconfig                            |   9 +
 sound/soc/tegra/Makefile                           |   2 +
 sound/soc/tegra/tegra_audio_graph_card.c           | 291 +++++++++++++++++++++
 14 files changed, 955 insertions(+), 18 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/sound/nvidia,tegra-audio-graph-card.yaml
 create mode 100644 arch/arm64/boot/dts/nvidia/tegra210-audio-graph.dtsi
 create mode 100644 include/sound/graph_card.h
 create mode 100644 sound/soc/tegra/tegra_audio_graph_card.c