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Date: Wed, 26 Feb 2020 10:02:52 -0600
From: Rob Herring <robh@...nel.org>
To: Sameer Pujar <spujar@...dia.com>
Cc: perex@...ex.cz, tiwai@...e.com, broonie@...nel.org,
lgirdwood@...il.com, thierry.reding@...il.com,
jonathanh@...dia.com, digetx@...il.com,
alsa-devel@...a-project.org, devicetree@...r.kernel.org,
linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org,
sharadg@...dia.com, mkumard@...dia.com, viswanathl@...dia.com,
rlokhande@...dia.com, dramesh@...dia.com, atalambedu@...dia.com
Subject: Re: [PATCH v3 01/10] dt-bindings: sound: tegra: add DT binding for
AHUB
On Thu, Feb 20, 2020 at 12:04:43PM +0530, Sameer Pujar wrote:
> Audio Hub (AHUB) comprises a collection of hardware accelerators for audio
> pre-processing and post-processing and a programmable full crossbar for
> audio routing across these accelerators. This patch adds YAML schema for DT
> binding of AHUB and few of its following components. These devices will be
> registered as ASoC components.
> * ADMAIF
> * I2S
> * DMIC
> * DSPK
>
> Signed-off-by: Sameer Pujar <spujar@...dia.com>
> ---
> .../bindings/sound/nvidia,tegra186-dspk.yaml | 88 +++++++++++
> .../bindings/sound/nvidia,tegra210-admaif.yaml | 163 +++++++++++++++++++++
> .../bindings/sound/nvidia,tegra210-ahub.yaml | 110 ++++++++++++++
> .../bindings/sound/nvidia,tegra210-dmic.yaml | 88 +++++++++++
> .../bindings/sound/nvidia,tegra210-i2s.yaml | 101 +++++++++++++
> 5 files changed, 550 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/sound/nvidia,tegra186-dspk.yaml
> create mode 100644 Documentation/devicetree/bindings/sound/nvidia,tegra210-admaif.yaml
> create mode 100644 Documentation/devicetree/bindings/sound/nvidia,tegra210-ahub.yaml
> create mode 100644 Documentation/devicetree/bindings/sound/nvidia,tegra210-dmic.yaml
> create mode 100644 Documentation/devicetree/bindings/sound/nvidia,tegra210-i2s.yaml
>
> diff --git a/Documentation/devicetree/bindings/sound/nvidia,tegra186-dspk.yaml b/Documentation/devicetree/bindings/sound/nvidia,tegra186-dspk.yaml
> new file mode 100644
> index 0000000..79c720d
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/nvidia,tegra186-dspk.yaml
> @@ -0,0 +1,88 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/sound/nvidia,tegra186-dspk.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Tegra186 DSPK Controller Device Tree Bindings
> +
> +description: |
> + The Digital Speaker Controller (DSPK) can be viewed as a Pulse
> + Density Modulation (PDM) transmitter that up-samples the input to
> + the desired sampling rate by interpolation and then converts the
> + over sampled Pulse Code Modulation (PCM) input to the desired 1-bit
> + output via Delta Sigma Modulation (DSM).
> +
> +maintainers:
> + - Jon Hunter <jonathanh@...dia.com>
> + - Sameer Pujar <spujar@...dia.com>
> +
> +properties:
> + $nodename:
> + pattern: "^dspk@[0-9a-f]*$"
> +
> + compatible:
> + oneOf:
> + - const: nvidia,tegra186-dspk
> + - items:
> + - const: nvidia,tegra194-dspk
> + - const: nvidia,tegra186-dspk
> +
> + reg:
> + maxItems: 1
> +
> + clocks:
> + description: DSPK interface clock
Needs:
maxItems: 1
I'd drop the description too. It's pretty generic...
> +
> + clock-names:
> + const: dspk
> +
> + assigned-clocks:
> + description: DSPK interface clock
> +
> + assigned-clock-parents:
> + description: Parent for DSPK interface clock
> +
> + assigned-clock-rates:
> + description: Initial rate of DSPK interface clock
maxItems: 1 for these 3.
> +
> + "#sound-dai-cells":
> + const: 1
> +
> + sound-name-prefix:
> + pattern: "^DSPK[1-9]$"
> + allOf:
> + - $ref: /schemas/types.yaml#/definitions/string
> + description:
> + Used as prefix for sink/source names of the component. Must be a
> + unique string among multiple instances of the same component.
> + The name can be "DSPK1" or "DSPKx", where x depends on the maximum
> + available instances on a Tegra SoC.
> +
> +required:
> + - compatible
> + - reg
> + - clocks
> + - clock-names
> + - assigned-clocks
> + - assigned-clock-parents
> + - "#sound-dai-cells"
> + - sound-name-prefix
> +
> +examples:
> + - |
> + #include<dt-bindings/clock/tegra186-clock.h>
> +
> + dspk@...5000 {
> + compatible = "nvidia,tegra186-dspk";
> + reg = <0x2905000 0x100>;
> + clocks = <&bpmp TEGRA186_CLK_DSPK1>;
> + clock-names = "dspk";
> + assigned-clocks = <&bpmp TEGRA186_CLK_DSPK1>;
> + assigned-clock-parents = <&bpmp TEGRA186_CLK_PLL_A_OUT0>;
> + assigned-clock-rates = <12288000>;
> + #sound-dai-cells = <1>;
> + sound-name-prefix = "DSPK1";
> + };
> +
> +...
> diff --git a/Documentation/devicetree/bindings/sound/nvidia,tegra210-admaif.yaml b/Documentation/devicetree/bindings/sound/nvidia,tegra210-admaif.yaml
> new file mode 100644
> index 0000000..46637c6a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/nvidia,tegra210-admaif.yaml
> @@ -0,0 +1,163 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/sound/nvidia,tegra210-admaif.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Tegra210 ADMAIF Device Tree Bindings
> +
> +description: |
> + ADMAIF is the interface between ADMA and AHUB. Each ADMA channel
> + that sends/receives data to/from AHUB must interface through an
> + ADMAIF channel. ADMA channel sending data to AHUB pairs with ADMAIF
> + Tx channel and ADMA channel receiving data from AHUB pairs with
> + ADMAIF Rx channel.
> +
> +maintainers:
> + - Jon Hunter <jonathanh@...dia.com>
> + - Sameer Pujar <spujar@...dia.com>
> +
> +properties:
> + $nodename:
> + pattern: "^admaif@[0-9a-f]*$"
> +
> + compatible:
> + oneOf:
> + - enum:
> + - nvidia,tegra210-admaif
> + - nvidia,tegra186-admaif
> + - items:
> + - const: nvidia,tegra194-admaif
> + - const: nvidia,tegra186-admaif
> +
> + reg:
> + maxItems: 1
> +
> + dmas: true
> +
> + dma-names: true
> +
> + "#sound-dai-cells":
> + const: 1
> +
> +if:
> + properties:
> + compatible:
> + contains:
> + const: nvidia,tegra210-admaif
> +
> +then:
> + properties:
> + dmas:
> + description:
> + DMA channel specifiers, equally divided for Tx and Rx.
> + minItems: 1
> + maxItems: 20
> + dma-names:
> + items:
> + pattern: "^[rt]x(10|[1-9])$"
> + description:
> + Should be "rx1", "rx2" ... "rx10" for DMA Rx channel
> + Should be "tx1", "tx2" ... "tx10" for DMA Tx channel
> + minItems: 1
> + maxItems: 20
> +
> +else:
> + properties:
> + dmas:
> + description:
> + DMA channel specifiers, equally divided for Tx and Rx.
> + minItems: 1
> + maxItems: 40
> + dma-names:
> + items:
> + pattern: "^[rt]x(1[0-9]|[1-9]|20)$"
> + description:
> + Should be "rx1", "rx2" ... "rx20" for DMA Rx channel
> + Should be "tx1", "tx2" ... "tx20" for DMA Tx channel
> + minItems: 1
> + maxItems: 40
> +
> +required:
> + - compatible
> + - reg
> + - dmas
> + - dma-names
> + - "#sound-dai-cells"
> +
> +examples:
> + - |
> + admaif@...d0000 {
> + compatible = "nvidia,tegra210-admaif";
> + reg = <0x702d0000 0x800>;
> + dmas = <&adma 1>, <&adma 1>,
> + <&adma 2>, <&adma 2>,
> + <&adma 3>, <&adma 3>,
> + <&adma 4>, <&adma 4>,
> + <&adma 5>, <&adma 5>,
> + <&adma 6>, <&adma 6>,
> + <&adma 7>, <&adma 7>,
> + <&adma 8>, <&adma 8>,
> + <&adma 9>, <&adma 9>,
> + <&adma 10>, <&adma 10>;
> + dma-names = "rx1", "tx1",
> + "rx2", "tx2",
> + "rx3", "tx3",
> + "rx4", "tx4",
> + "rx5", "tx5",
> + "rx6", "tx6",
> + "rx7", "tx7",
> + "rx8", "tx8",
> + "rx9", "tx9",
> + "rx10", "tx10";
> + #sound-dai-cells = <1>;
> + };
> +
> + - |
> + admaif@...f000 {
> + compatible = "nvidia,tegra186-admaif";
> + reg = <0x0290f000 0x1000>;
> + dmas = <&adma 1>, <&adma 1>,
> + <&adma 2>, <&adma 2>,
> + <&adma 3>, <&adma 3>,
> + <&adma 4>, <&adma 4>,
> + <&adma 5>, <&adma 5>,
> + <&adma 6>, <&adma 6>,
> + <&adma 7>, <&adma 7>,
> + <&adma 8>, <&adma 8>,
> + <&adma 9>, <&adma 9>,
> + <&adma 10>, <&adma 10>,
> + <&adma 11>, <&adma 11>,
> + <&adma 12>, <&adma 12>,
> + <&adma 13>, <&adma 13>,
> + <&adma 14>, <&adma 14>,
> + <&adma 15>, <&adma 15>,
> + <&adma 16>, <&adma 16>,
> + <&adma 17>, <&adma 17>,
> + <&adma 18>, <&adma 18>,
> + <&adma 19>, <&adma 19>,
> + <&adma 20>, <&adma 20>;
> + dma-names = "rx1", "tx1",
> + "rx2", "tx2",
> + "rx3", "tx3",
> + "rx4", "tx4",
> + "rx5", "tx5",
> + "rx6", "tx6",
> + "rx7", "tx7",
> + "rx8", "tx8",
> + "rx9", "tx9",
> + "rx10", "tx10",
> + "rx11", "tx11",
> + "rx12", "tx12",
> + "rx13", "tx13",
> + "rx14", "tx14",
> + "rx15", "tx15",
> + "rx16", "tx16",
> + "rx17", "tx17",
> + "rx18", "tx18",
> + "rx19", "tx19",
> + "rx20", "tx20";
> + #sound-dai-cells = <1>;
> + };
I don't see a lot of value in having 2 examples.
> +
> +...
> diff --git a/Documentation/devicetree/bindings/sound/nvidia,tegra210-ahub.yaml b/Documentation/devicetree/bindings/sound/nvidia,tegra210-ahub.yaml
> new file mode 100644
> index 0000000..5f3e1ed
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/nvidia,tegra210-ahub.yaml
Same prior comments apply here.
> @@ -0,0 +1,110 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/sound/nvidia,tegra210-ahub.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Tegra210 AHUB Device Tree Bindings
> +
> +description: |
> + The Audio Hub (AHUB) comprises a collection of hardware accelerators
> + for audio pre-processing, post-processing and a programmable full
> + crossbar for routing audio data across these accelerators. It has
> + external interfaces such as I2S, DMIC, DSPK. It interfaces with ADMA
> + engine through ADMAIF.
> +
> +maintainers:
> + - Jon Hunter <jonathanh@...dia.com>
> + - Sameer Pujar <spujar@...dia.com>
> +
> +properties:
> + $nodename:
> + pattern: "^ahub@[0-9a-f]*$"
> +
> + compatible:
> + oneOf:
> + - enum:
> + - nvidia,tegra210-ahub
> + - nvidia,tegra186-ahub
> + - items:
> + - const: nvidia,tegra194-ahub
> + - const: nvidia,tegra186-ahub
> +
> + reg:
> + maxItems: 1
> +
> + clocks:
> + description: AHUB module clock
> +
> + clock-names:
> + const: ahub
> +
> + assigned-clocks:
> + description: AHUB module clock
> +
> + assigned-clock-parents:
> + description: parent for AHUB module clock
> +
> + assigned-clock-rates:
> + description: AHUB module clock rate
> +
> + "#address-cells":
> + const: 1
> +
> + "#size-cells":
> + const: 1
> +
> + ranges:
> + $ref: /schemas/types.yaml#/definitions/uint32-array
ranges already has a type.
> + description: Specify address range for the node and its children
Drop. That's every 'ranges'.
> + minItems: 1
> +
> + "#sound-dai-cells":
> + const: 1
> +
> +required:
> + - compatible
> + - reg
> + - clocks
> + - clock-names
> + - assigned-clocks
> + - assigned-clock-parents
> + - "#address-cells"
> + - "#size-cells"
> + - ranges
> + - "#sound-dai-cells"
> +
> +examples:
> + - |
> + #include<dt-bindings/clock/tegra210-car.h>
> +
> + ahub@...d0800 {
> + compatible = "nvidia,tegra210-ahub";
> + reg = <0x702d0800 0x800>;
> + clocks = <&tegra_car TEGRA210_CLK_D_AUDIO>;
> + clock-names = "ahub";
> + assigned-clocks = <&tegra_car TEGRA210_CLK_D_AUDIO>;
> + assigned-clock-parents = <&tegra_car TEGRA210_CLK_PLL_A_OUT0>;
> + #address-cells = <1>;
> + #size-cells = <1>;
> + ranges = <0x702d0000 0x702d0000 0x0000e400>;
These properties imply you have child nodes, but none are defined.
> + #sound-dai-cells = <1>;
> + };
> +
> + - |
> + #include<dt-bindings/clock/tegra186-clock.h>
> +
> + ahub@...0800 {
> + compatible = "nvidia,tegra186-ahub";
> + reg = <0x02900800 0x800>;
> + clocks = <&bpmp TEGRA186_CLK_AHUB>;
> + clock-names = "ahub";
> + assigned-clocks = <&bpmp TEGRA186_CLK_AHUB>;
> + assigned-clock-parents = <&bpmp TEGRA186_CLK_PLL_A_OUT0>;
> + #address-cells = <1>;
> + #size-cells = <1>;
> + ranges = <0x02900800 0x02900800 0x11800>;
> + #sound-dai-cells = <1>;
> + };
Really need 2 examples?
> +
> +...
Same comments apply to the rest.
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