[PATCH v2 6/7] arm64: dts: allwinner: pinephone: Add support for Bluetooth audio
From: Samuel Holland <samuel@sholland.org>
Date: 2021-01-13 06:08:29
Also in:
alsa-devel, linux-devicetree, lkml
Subsystem:
arm/allwinner sunxi soc support, the rest · Maintainers:
Chen-Yu Tsai, Jernej Skrabec, Samuel Holland, Linus Torvalds
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
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