[PATCH v2 0/7] PinePhone BT audio bringup

[PATCH v2 0/7] PinePhone BT audio bringup

[Samuel Holland]

This series makes use of the additional DAIs recently added to the
sun8i-codec driver to add hardware routing for BT SCO (headset) audio
on the PinePhone.

The BT audio connection is represented by the "dummy" bt-sco codec. The
connection to the Quectel EG-25G modem via AIF2 works as well, but I do
not include it here because there is no appropriate codec driver in
tree. We have been using an out-of-tree "dummy" codec driver for the
modem similar to bt-sco, and I'm not sure if such a driver would be
desired upstream.

Changes from v1:
  - Fixed DT binding example to follow new binding

Arnaud Ferraris (1):
  arm64: dts: allwinner: pinephone: Set audio card name

Samuel Holland (6):
  ASoC: dt-bindings: sun8i-codec: Increase #sound-dai-cells
  ARM: dts: sun8i-a33: Allow using multiple codec DAIs
  arm64: dts: allwinner: a64: Allow using multiple codec DAIs
  arm64: dts: allwinner: a64: Add pinmux nodes for AIF2/AIF3
  arm64: dts: allwinner: a64: Allow multiple DAI links
  arm64: dts: allwinner: pinephone: Add support for Bluetooth audio

 .../sound/allwinner,sun8i-a33-codec.yaml      |  4 +-
 arch/arm/boot/dts/sun8i-a33.dtsi              |  4 +-
 .../dts/allwinner/sun50i-a64-pinephone.dtsi   | 25 +++++++++++++
 arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 37 ++++++++++++++-----
 4 files changed, 56 insertions(+), 14 deletions(-)

-- 
2.26.2

[PATCH v2 1/7] ASoC: dt-bindings: sun8i-codec: Increase #sound-dai-cells

[Samuel Holland]

Increase sound-dai-cells to 1 to allow using the DAIs in the codec
corresponding to AIF2 and AIF3.

The generic ASoC OF code supports a #sound-dai-cells value of 0 or 1
with no impact to the driver, so this is a backward-compatible change.

Signed-off-by: Samuel Holland <samuel@sholland.org>
---
 .../devicetree/bindings/sound/allwinner,sun8i-a33-codec.yaml  | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/sound/allwinner,sun8i-a33-codec.yaml b/Documentation/devicetree/bindings/sound/allwinner,sun8i-a33-codec.yaml
index 67405e6d8168..3e02baa1d9ce 100644
--- a/Documentation/devicetree/bindings/sound/allwinner,sun8i-a33-codec.yaml
+++ b/Documentation/devicetree/bindings/sound/allwinner,sun8i-a33-codec.yaml
@@ -12,7 +12,7 @@ maintainers:
 
 properties:
   "#sound-dai-cells":
-    const: 0
+    const: 1
 
   compatible:
     oneOf:
@@ -50,7 +50,7 @@ additionalProperties: false
 examples:
   - |
     audio-codec@1c22e00 {
-      #sound-dai-cells = <0>;
+      #sound-dai-cells = <1>;
       compatible = "allwinner,sun8i-a33-codec";
       reg = <0x01c22e00 0x400>;
       interrupts = <0 29 4>;
-- 
2.26.2

Re: [PATCH v2 1/7] ASoC: dt-bindings: sun8i-codec: Increase #sound-dai-cells

[Maxime Ripard]

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Hi,

On Wed, Jan 13, 2021 at 12:06:09AM -0600, Samuel Holland wrote:
> Increase sound-dai-cells to 1 to allow using the DAIs in the codec
> corresponding to AIF2 and AIF3.
> 
> The generic ASoC OF code supports a #sound-dai-cells value of 0 or 1
> with no impact to the driver, so this is a backward-compatible change.
> 
> Signed-off-by: Samuel Holland <samuel@sholland.org>
> ---
>  .../devicetree/bindings/sound/allwinner,sun8i-a33-codec.yaml  | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/sound/allwinner,sun8i-a33-codec.yaml b/Documentation/devicetree/bindings/sound/allwinner,sun8i-a33-codec.yaml
> index 67405e6d8168..3e02baa1d9ce 100644
> --- a/Documentation/devicetree/bindings/sound/allwinner,sun8i-a33-codec.yaml
> +++ b/Documentation/devicetree/bindings/sound/allwinner,sun8i-a33-codec.yaml
> @@ -12,7 +12,7 @@ maintainers:
>  
>  properties:
>    "#sound-dai-cells":
> -    const: 0
> +    const: 1

We should make it clearer that 0 is still ok, but is deprecated

You can do it with:

oneOf:
  - const: 1
  - const: 0
    deprecated: true
    description: >
      Whatever

Maxime

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[PATCH v2 2/7] ARM: dts: sun8i-a33: Allow using multiple codec DAIs

[Samuel Holland]

Increase #sound-dai-cells on the digital codec to allow using the other
DAIs provided by the codec for AIF2 and AIF3.

Signed-off-by: Samuel Holland <samuel@sholland.org>
---
 arch/arm/boot/dts/sun8i-a33.dtsi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/sun8i-a33.dtsi b/arch/arm/boot/dts/sun8i-a33.dtsi
index c458f5fb124f..0b38f9f35074 100644
--- a/arch/arm/boot/dts/sun8i-a33.dtsi
+++ b/arch/arm/boot/dts/sun8i-a33.dtsi
@@ -198,7 +198,7 @@ simple-audio-card,cpu {
 		};
 
 		link_codec: simple-audio-card,codec {
-			sound-dai = <&codec>;
+			sound-dai = <&codec 0>;
 		};
 	};
 
@@ -238,7 +238,7 @@ dai: dai@1c22c00 {
 		};
 
 		codec: codec@1c22e00 {
-			#sound-dai-cells = <0>;
+			#sound-dai-cells = <1>;
 			compatible = "allwinner,sun8i-a33-codec";
 			reg = <0x01c22e00 0x400>;
 			interrupts = <GIC_SPI 29 IRQ_TYPE_LEVEL_HIGH>;
-- 
2.26.2

[PATCH v2 3/7] arm64: dts: allwinner: a64: Allow using multiple codec DAIs

[Samuel Holland]

Increase #sound-dai-cells on the digital codec to allow using the other
DAIs provided by the codec for AIF2 and AIF3.

Signed-off-by: Samuel Holland <samuel@sholland.org>
---
 arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
index 51cc30e84e26..e788251e582f 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
+++ b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
@@ -150,7 +150,7 @@ cpudai: simple-audio-card,cpu {
 		};
 
 		link_codec: simple-audio-card,codec {
-			sound-dai = <&codec>;
+			sound-dai = <&codec 0>;
 		};
 	};
 
@@ -874,7 +874,7 @@ dai: dai@1c22c00 {
 		};
 
 		codec: codec@1c22e00 {
-			#sound-dai-cells = <0>;
+			#sound-dai-cells = <1>;
 			compatible = "allwinner,sun50i-a64-codec",
 				     "allwinner,sun8i-a33-codec";
 			reg = <0x01c22e00 0x600>;
-- 
2.26.2

[PATCH v2 4/7] arm64: dts: allwinner: a64: Add pinmux nodes for AIF2/AIF3

[Samuel Holland]

Now that the sun8i-codec driver supports AIF2 and AIF3, boards can use
them in DAI links. Add the necessary pinmux nodes.

Signed-off-by: Samuel Holland <samuel@sholland.org>
---
 arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
index e788251e582f..4bba468d8ec2 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
+++ b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
@@ -654,6 +654,18 @@ pio: pinctrl@1c20800 {
 			interrupt-controller;
 			#interrupt-cells = <3>;
 
+			/omit-if-no-ref/
+			aif2_pins: aif2-pins {
+				pins = "PB4", "PB5", "PB6", "PB7";
+				function = "aif2";
+			};
+
+			/omit-if-no-ref/
+			aif3_pins: aif3-pins {
+				pins = "PG10", "PG11", "PG12", "PG13";
+				function = "aif3";
+			};
+
 			csi_pins: csi-pins {
 				pins = "PE0", "PE2", "PE3", "PE4", "PE5", "PE6",
 				       "PE7", "PE8", "PE9", "PE10", "PE11";
-- 
2.26.2

[PATCH v2 5/7] arm64: dts: allwinner: a64: Allow multiple DAI links

[Samuel Holland]

simple-audio-card supports either a single DAI link at the top level, or
subnodes with one or more DAI links. To use the secondary AIFs on the
codec, we need to add additional DAI links to the same sound card, so we
need to use the other binding.

Signed-off-by: Samuel Holland <samuel@sholland.org>
---
 arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 23 +++++++++++--------
 1 file changed, 14 insertions(+), 9 deletions(-)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
index 4bba468d8ec2..fd9a278f014a 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
+++ b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
@@ -131,12 +131,10 @@ psci {
 	};
 
 	sound: sound {
+		#address-cells = <1>;
+		#size-cells = <0>;
 		compatible = "simple-audio-card";
 		simple-audio-card,name = "sun50i-a64-audio";
-		simple-audio-card,format = "i2s";
-		simple-audio-card,frame-master = <&cpudai>;
-		simple-audio-card,bitclock-master = <&cpudai>;
-		simple-audio-card,mclk-fs = <128>;
 		simple-audio-card,aux-devs = <&codec_analog>;
 		simple-audio-card,routing =
 				"Left DAC", "DACL",
@@ -145,12 +143,19 @@ sound: sound {
 				"ADCR", "Right ADC";
 		status = "disabled";
 
-		cpudai: simple-audio-card,cpu {
-			sound-dai = <&dai>;
-		};
+		simple-audio-card,dai-link@0 {
+			format = "i2s";
+			frame-master = <&link0_cpu>;
+			bitclock-master = <&link0_cpu>;
+			mclk-fs = <128>;
 
-		link_codec: simple-audio-card,codec {
-			sound-dai = <&codec 0>;
+			link0_cpu: cpu {
+				sound-dai = <&dai>;
+			};
+
+			link0_codec: codec {
+				sound-dai = <&codec 0>;
+			};
 		};
 	};
 
-- 
2.26.2

[PATCH v2 6/7] arm64: dts: allwinner: pinephone: Add support for Bluetooth audio

[Samuel Holland]

The PinePhone has a Bluetooth chip with its PCM interface connected to
AIF3. Add the DAI link so headeset audio can be routed in hardware.

Even though the link is 16 bit PCM, configuring the link a 32-bit slot
is required for compatibility with AIF2, which also uses a 32-bit slot,
and which shares clock dividers with AIF3. Using equal clock frequencies
allows the modem and headset to be used at the same time.

Signed-off-by: Samuel Holland <samuel@sholland.org>
---
 .../dts/allwinner/sun50i-a64-pinephone.dtsi   | 24 +++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi
index 2dfe9bae8c67..e0db2f1373bc 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi
+++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi
@@ -24,6 +24,11 @@ backlight: backlight {
 		/* Backlight configuration differs per PinePhone revision. */
 	};
 
+	bt_sco_codec: bt-sco-codec {
+		#sound-dai-cells = <1>;
+		compatible = "linux,bt-sco";
+	};
+
 	chosen {
 		stdout-path = "serial0:115200n8";
 	};
@@ -82,6 +87,8 @@ vibrator {
 };
 
 &codec {
+	pinctrl-names = "default";
+	pinctrl-0 = <&aif3_pins>;
 	status = "okay";
 };
 
@@ -439,6 +446,23 @@ &sound {
 			"MIC1", "Internal Microphone",
 			"Headset Microphone", "HBIAS",
 			"MIC2", "Headset Microphone";
+
+	simple-audio-card,dai-link@2 {
+		format = "dsp_a";
+		frame-master = <&link2_codec>;
+		bitclock-master = <&link2_codec>;
+		bitclock-inversion;
+
+		link2_cpu: cpu {
+			sound-dai = <&bt_sco_codec 0>;
+		};
+
+		link2_codec: codec {
+			sound-dai = <&codec 2>;
+			dai-tdm-slot-num = <1>;
+			dai-tdm-slot-width = <32>;
+		};
+	};
 };
 
 &uart0 {
-- 
2.26.2

[PATCH v2 7/7] arm64: dts: allwinner: pinephone: Set audio card name

[Samuel Holland]

From: Arnaud Ferraris <arnaud.ferraris@collabora.com>

Add the "PinePhone" name to the sound card: this will make
upstreaming an ALSA UCM config easier as we can use a unique name.

It also avoids an issue where the default card name is truncated.

Signed-off-by: Arnaud Ferraris <arnaud.ferraris@collabora.com>
[Samuel: Split out change, updated commit message]
Signed-off-by: Samuel Holland <samuel@sholland.org>
---
 arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi
index e0db2f1373bc..cf6dcdd135b5 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi
+++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi
@@ -425,6 +425,7 @@ &reg_rtc_ldo {
 
 &sound {
 	status = "okay";
+	simple-audio-card,name = "PinePhone";
 	simple-audio-card,aux-devs = <&codec_analog>, <&speaker_amp>;
 	simple-audio-card,widgets = "Microphone", "Headset Microphone",
 				    "Microphone", "Internal Microphone",
-- 
2.26.2