This series adds the AIU audio controller for Meson8 and Meson8b. The
AIU audio controller has been found to work fine with out-of-tree
patches for HDMI audio (over I2S). SPDIF output also works (tested with
a scope).
Endless Mini (EC-100) has an RT5640 audio codec. The driver for this
codec can be selected since commit 08c56cab302a05 ("ASoC: rt5640: Make
codec selectable"), which is part of Linux 5.14-rc1. While support is
not perfect (due to us lacking proper support for configuring
GPIO_BSD_EN) audio output still works fine.
This series is based on my bugfix patch "ARM: dts: meson8: Use a
higher default GPU clock frequency" from [0]
[0] https://patchwork.kernel.org/project/linux-amlogic/patch/[email protected]/
Martin Blumenstingl (2):
ARM: dts: meson: Add the AIU audio controller
ARM: dts: meson8b: ec100: wire up the RT5640 audio codec
arch/arm/boot/dts/meson.dtsi | 11 +++++
arch/arm/boot/dts/meson8.dtsi | 63 +++++++++++++++++++++++++++++
arch/arm/boot/dts/meson8b-ec100.dts | 45 +++++++++++++++++++++
arch/arm/boot/dts/meson8b.dtsi | 63 +++++++++++++++++++++++++++++
4 files changed, 182 insertions(+)
--
2.32.0
The Realtek RT5640 codec is connected to the SoC's I2S interface.
Describe this in the .dts together with the codec's LDO1 enable GPIO so
audio can be played on the Endless Mini.
While here, add a note about the realtek,ldo1-en-gpios for which the
EC100 uses GPIO_BSD_EN. Due to driver limitations this pin cannot be
used currently.
Signed-off-by: Martin Blumenstingl <[email protected]>
---
arch/arm/boot/dts/meson8b-ec100.dts | 45 +++++++++++++++++++++++++++++
1 file changed, 45 insertions(+)
diff --git a/arch/arm/boot/dts/meson8b-ec100.dts b/arch/arm/boot/dts/meson8b-ec100.dts
index 8e48ccc6b634..177feb09a66d 100644
--- a/arch/arm/boot/dts/meson8b-ec100.dts
+++ b/arch/arm/boot/dts/meson8b-ec100.dts
@@ -96,6 +96,33 @@ rtc32k_xtal: rtc32k-xtal-clk {
#clock-cells = <0>;
};
+ sound {
+ compatible = "amlogic,gx-sound-card";
+ model = "M8B-EC100";
+ audio-routing = "I2S Encoder Playback", "I2S FIFO Playback";
+
+ assigned-clocks = <&clkc CLKID_MPLL0>,
+ <&clkc CLKID_MPLL1>,
+ <&clkc CLKID_MPLL2>;
+ assigned-clock-rates = <270950400>,
+ <294912000>,
+ <393216000>;
+
+ dai-link-0 {
+ sound-dai = <&aiu AIU_CPU CPU_I2S_FIFO>;
+ };
+
+ dai-link-1 {
+ sound-dai = <&aiu AIU_CPU CPU_I2S_ENCODER>;
+ dai-format = "i2s";
+ mclk-fs = <256>;
+
+ codec-0 {
+ sound-dai = <&rt5640>;
+ };
+ };
+ };
+
usb_vbus: regulator-usb-vbus {
/*
* Silergy SY6288CCAC-GP 2A Power Distribution Switch.
@@ -242,6 +269,14 @@ vddee: regulator-vddee {
};
};
+&aiu {
+ status = "okay";
+
+ pinctrl-0 = <&i2s_am_clk_pins>, <&i2s_out_ao_clk_pins>,
+ <&i2s_out_lr_clk_pins>, <&i2s_out_ch01_ao_pins>;
+ pinctrl-names = "default";
+};
+
&cpu0 {
cpu-supply = <&vcck>;
};
@@ -283,9 +318,19 @@ &i2c_A {
rt5640: codec@1c {
compatible = "realtek,rt5640";
+
reg = <0x1c>;
+
+ #sound-dai-cells = <0>;
+
interrupt-parent = <&gpio_intc>;
interrupts = <13 IRQ_TYPE_EDGE_BOTH>; /* GPIOAO_13 */
+
+ /*
+ * TODO: realtek,ldo1-en-gpios is connected to GPIO_BSD_EN.
+ * We currently cannot configure this pin correctly.
+ * Luckily for us it's in the "right" state by default.
+ */
realtek,in1-differential;
};
};
--
2.32.0