Merge series "Add audio driver base on rpmsg on i.MX platform" from Shengjiu Wang <shengjiu.wang@nxp.com>:

On Asymmetric multiprocessor, there is Cortex-A core and Cortex-M core,
Linux is running on A core, RTOS is running on M core.
The audio hardware device can be controlled by Cortex-M device,
So audio playback/capture can be handled by M core.

Rpmsg is the interface for sending and receiving msg to and from M
core, that we can create a virtual sound on Cortex-A core side.

A core will tell the Cortex-M core sound format/rate/channel,
where is the data buffer, what is the period size, when to start,
when to stop and when suspend or resume happen, each of this behavior
there is defined rpmsg command.

Especially we designed the low power audio case, that is to
allocate a large buffer and fill the data, then Cortex-A core can go
to sleep mode, Cortex-M core continue to play the sound, when the
buffer is consumed, Cortex-M core will trigger the Cortex-A core to
wakeup to fill data.

changes in v5:
- remove unneeded property in binding doc and driver
- update binding doc according to Rob's comments.
- Fix link issue reported by kernel test robot

changes in v4:
- remove the sound card node, merge the property to cpu dai node
  according to Rob's comments.
- sound card device will be registered by cpu dai driver.
- Fix do_div issue reported by kernel test robot

changes in v3:
- add local refcount for clk enablement in hw_params()
- update the document according Rob's comments

changes in v2:
- update codes and comments according to Mark's comments

Shengjiu Wang (6):
  ASoC: soc-component: Add snd_soc_pcm_component_ack
  ASoC: fsl_rpmsg: Add CPU DAI driver for audio base on rpmsg
  ASoC: dt-bindings: fsl_rpmsg: Add binding doc for rpmsg audio device
  ASoC: imx-audio-rpmsg: Add rpmsg_driver for audio channel
  ASoC: imx-pcm-rpmsg: Add platform driver for audio base on rpmsg
  ASoC: imx-rpmsg: Add machine driver for audio base on rpmsg

 .../devicetree/bindings/sound/fsl,rpmsg.yaml  | 108 +++
 include/sound/soc-component.h                 |   3 +
 sound/soc/fsl/Kconfig                         |  30 +
 sound/soc/fsl/Makefile                        |   6 +
 sound/soc/fsl/fsl_rpmsg.c                     | 279 ++++++
 sound/soc/fsl/fsl_rpmsg.h                     |  35 +
 sound/soc/fsl/imx-audio-rpmsg.c               | 140 +++
 sound/soc/fsl/imx-pcm-rpmsg.c                 | 918 ++++++++++++++++++
 sound/soc/fsl/imx-pcm-rpmsg.h                 | 512 ++++++++++
 sound/soc/fsl/imx-rpmsg.c                     | 150 +++
 sound/soc/soc-component.c                     |  14 +
 sound/soc/soc-pcm.c                           |   2 +
 12 files changed, 2197 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/fsl,rpmsg.yaml
 create mode 100644 sound/soc/fsl/fsl_rpmsg.c
 create mode 100644 sound/soc/fsl/fsl_rpmsg.h
 create mode 100644 sound/soc/fsl/imx-audio-rpmsg.c
 create mode 100644 sound/soc/fsl/imx-pcm-rpmsg.c
 create mode 100644 sound/soc/fsl/imx-pcm-rpmsg.h
 create mode 100644 sound/soc/fsl/imx-rpmsg.c

--
2.27.0

1 files changed, 108 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/sound/fsl,rpmsg.yaml b/Documentation/devicetree/bindings/sound/fsl,rpmsg.yaml
new file mode 100644
index 000000000000..b4c190bddd84
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/fsl,rpmsg.yaml
@@ -0,0 +1,108 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/fsl,rpmsg.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP Audio RPMSG CPU DAI Controller
+
+maintainers:
+  - Shengjiu Wang <shengjiu.wang@nxp.com>
+
+description: |
+  fsl_rpmsg is a virtual audio device. Mapping to real hardware devices
+  are SAI, DMA controlled by Cortex M core. What we see from Linux
+  side is a device which provides audio service by rpmsg channel.
+
+properties:
+  compatible:
+    enum:
+      - fsl,imx7ulp-rpmsg-audio
+      - fsl,imx8mn-rpmsg-audio
+      - fsl,imx8mm-rpmsg-audio
+      - fsl,imx8mp-rpmsg-audio
+
+  model:
+    $ref: /schemas/types.yaml#/definitions/string
+    description: User specified audio sound card name
+
+  clocks:
+    items:
+      - description: Peripheral clock for register access
+      - description: Master clock
+      - description: DMA clock for DMA register access
+      - description: Parent clock for multiple of 8kHz sample rates
+      - description: Parent clock for multiple of 11kHz sample rates
+
+  clock-names:
+    items:
+      - const: ipg
+      - const: mclk
+      - const: dma
+      - const: pll8k
+      - const: pll11k
+
+  power-domains:
+    description:
+      List of phandle and PM domain specifier as documented in
+      Documentation/devicetree/bindings/power/power_domain.txt
+    maxItems: 1
+
+  memory-region:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      phandle to a node describing reserved memory (System RAM memory)
+      The M core can't access all the DDR memory space on some platform,
+      So reserved a specific memory for dma buffer which M core can
+      access.
+      (see bindings/reserved-memory/reserved-memory.txt)
+
+  audio-codec:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: The phandle to a node of audio codec
+
+  audio-routing:
+    $ref: /schemas/types.yaml#/definitions/non-unique-string-array
+    description: |
+      A list of the connections between audio components. Each entry is a
+      pair of strings, the first being the connection's sink, the second
+      being the connection's source.
+
+  fsl,enable-lpa:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description: enable low power audio path.
+
+  fsl,rpmsg-out:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description: |
+      This is a boolean property. If present, the transmitting function
+      will be enabled.
+
+  fsl,rpmsg-in:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description: |
+      This is a boolean property. If present, the receiving function
+      will be enabled.
+
+required:
+  - compatible
+  - model
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/imx8mn-clock.h>
+
+    rpmsg_audio: rpmsg_audio {
+        compatible = "fsl,imx8mn-rpmsg-audio";
+        model = "wm8524-audio";
+        fsl,enable-lpa;
+        fsl,rpmsg-out;
+        clocks = <&clk IMX8MN_CLK_SAI3_IPG>,
+                 <&clk IMX8MN_CLK_SAI3_ROOT>,
+                 <&clk IMX8MN_CLK_SDMA3_ROOT>,
+                 <&clk IMX8MN_AUDIO_PLL1_OUT>,
+                 <&clk IMX8MN_AUDIO_PLL2_OUT>;
+        clock-names = "ipg", "mclk", "dma", "pll8k", "pll11k";
+    };