[PATCH 0/4] Add Sound support for RZ/G2L SMARC EVK

[PATCH 0/4] Add Sound support for RZ/G2L SMARC EVK

[Biju Das]

This patch series aims to add sound support on RZ/G2L SMARC EVK.

Audio playback/record tested with 44.1Khz sampling rate.

Going forward we planned to upstream versa3 clock driver[1] and
planned to override the initial values programmed in OTP, so that mclock has 2 clock sources.

Based on the sampling rate versa3 clock driver switch the clock source and 
we can support both 48KHZ and 44.1 KHz as CPU as master.

This patch series based on renesas-devel and depend upon [2]

[1] https://github.com/renesas-rz/rz_linux-cip/blob/rzg2l-cip41/drivers/clk/clk-versaclock3.c

[2]https://patchwork.kernel.org/project/linux-renesas-soc/list/?series=549985

Biju Das (4):
  arm64: dts: renesas: r9a07g044: Add DMA support to SSI
  arm64: dts: renesas: rzg2l-smarc: Add WM8978 sound codec
  arm64: dts: renesas: rzg2l-smarc: Enable audio
  arm64: dts: renesas: rzg2l-smarc: Add Mic routing

 arch/arm64/boot/dts/renesas/r9a07g044.dtsi   | 11 +++
 arch/arm64/boot/dts/renesas/rzg2l-smarc.dtsi | 79 ++++++++++++++++++++
 2 files changed, 90 insertions(+)

-- 
2.17.1

[PATCH 1/4] arm64: dts: renesas: r9a07g044: Add DMA support to SSI

[Biju Das]

Add dmac phandles to SSI nodes to support DMA operation.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
 arch/arm64/boot/dts/renesas/r9a07g044.dtsi | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/r9a07g044.dtsi b/arch/arm64/boot/dts/renesas/r9a07g044.dtsi
index 49f579856f14..95d80d1f0c6a 100644
--- a/arch/arm64/boot/dts/renesas/r9a07g044.dtsi
+++ b/arch/arm64/boot/dts/renesas/r9a07g044.dtsi
@@ -106,6 +106,9 @@
 				 <&audio_clk1>, <&audio_clk2>;
 			clock-names = "ssi", "ssi_sfr", "audio_clk1", "audio_clk2";
 			resets = <&cpg R9A07G044_SSI0_RST_M2_REG>;
+			dmas = <&dmac 0x2655>,
+			       <&dmac 0x2656>;
+			dma-names = "tx", "rx";
 			power-domains = <&cpg>;
 			#sound-dai-cells = <0>;
 			status = "disabled";
@@ -125,6 +128,9 @@
 				 <&audio_clk1>, <&audio_clk2>;
 			clock-names = "ssi", "ssi_sfr", "audio_clk1", "audio_clk2";
 			resets = <&cpg R9A07G044_SSI1_RST_M2_REG>;
+			dmas = <&dmac 0x2659>,
+			       <&dmac 0x265a>;
+			dma-names = "tx", "rx";
 			power-domains = <&cpg>;
 			#sound-dai-cells = <0>;
 			status = "disabled";
@@ -144,6 +150,8 @@
 				 <&audio_clk1>, <&audio_clk2>;
 			clock-names = "ssi", "ssi_sfr", "audio_clk1", "audio_clk2";
 			resets = <&cpg R9A07G044_SSI2_RST_M2_REG>;
+			dmas = <&dmac 0x265f>;
+			dma-names = "rt";
 			power-domains = <&cpg>;
 			#sound-dai-cells = <0>;
 			status = "disabled";
@@ -163,6 +171,9 @@
 				 <&audio_clk1>, <&audio_clk2>;
 			clock-names = "ssi", "ssi_sfr", "audio_clk1", "audio_clk2";
 			resets = <&cpg R9A07G044_SSI3_RST_M2_REG>;
+			dmas = <&dmac 0x2661>,
+			       <&dmac 0x2662>;
+			dma-names = "tx", "rx";
 			power-domains = <&cpg>;
 			#sound-dai-cells = <0>;
 			status = "disabled";
-- 
2.17.1

[PATCH 2/4] arm64: dts: renesas: rzg2l-smarc: Add WM8978 sound codec

[Biju Das]

Add WM8978 sound codec node to RZ/G2L SMARC EVK.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
 arch/arm64/boot/dts/renesas/rzg2l-smarc.dtsi | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/rzg2l-smarc.dtsi b/arch/arm64/boot/dts/renesas/rzg2l-smarc.dtsi
index 8ecc5b45fc99..85fd6dbabff2 100644
--- a/arch/arm64/boot/dts/renesas/rzg2l-smarc.dtsi
+++ b/arch/arm64/boot/dts/renesas/rzg2l-smarc.dtsi
@@ -65,8 +65,15 @@
 &i2c3 {
 	pinctrl-0 = <&i2c3_pins>;
 	pinctrl-names = "default";
+	clock-frequency = <400000>;
 
 	status = "okay";
+
+	wm8978: codec@1a {
+		compatible = "wlf,wm8978";
+		#sound-dai-cells = <0>;
+		reg = <0x1a>;
+	};
 };
 
 &ohci0 {
-- 
2.17.1

[PATCH 3/4] arm64: dts: renesas: rzg2l-smarc: Enable audio

[Biju Das]

Enable audio on RZ/G2L SMARC EVK by linking SSI0 with WM8978
audio CODEC.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
 arch/arm64/boot/dts/renesas/rzg2l-smarc.dtsi | 66 ++++++++++++++++++++
 1 file changed, 66 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/rzg2l-smarc.dtsi b/arch/arm64/boot/dts/renesas/rzg2l-smarc.dtsi
index 85fd6dbabff2..1791c21dfe74 100644
--- a/arch/arm64/boot/dts/renesas/rzg2l-smarc.dtsi
+++ b/arch/arm64/boot/dts/renesas/rzg2l-smarc.dtsi
@@ -8,6 +8,19 @@
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/pinctrl/rzg2l-pinctrl.h>
 
+/*
+ * SSI-WM8978
+ *
+ * This command is required when Playback/Capture
+ *
+ *	amixer cset name='Left Input Mixer L2 Switch' on
+ *	amixer cset name='Right Input Mixer R2 Switch' on
+ *	amixer cset name='Headphone Playback Volume' 100
+ *	amixer cset name='PCM Volume' 100%
+ *	amixer cset name='Input PGA Volume' 25
+ *
+ */
+
 / {
 	aliases {
 		serial0 = &scif0;
@@ -21,6 +34,29 @@
 		stdout-path = "serial0:115200n8";
 	};
 
+	audio_mclock: audio_mclock {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <11289600>;
+	};
+
+	snd_rzg2l: sound {
+		compatible = "simple-audio-card";
+		simple-audio-card,format = "i2s";
+		simple-audio-card,bitclock-master = <&cpu_dai>;
+		simple-audio-card,frame-master = <&cpu_dai>;
+		simple-audio-card,mclk-fs = <256>;
+
+		cpu_dai: simple-audio-card,cpu {
+			sound-dai = <&ssi0>;
+		};
+
+		codec_dai: simple-audio-card,codec {
+			clocks = <&audio_mclock>;
+			sound-dai = <&wm8978>;
+		};
+	};
+
 	usb0_vbus_otg: regulator-usb0-vbus-otg {
 		compatible = "regulator-fixed";
 
@@ -30,6 +66,14 @@
 	};
 };
 
+&audio_clk1{
+	clock-frequency = <11289600>;
+};
+
+&audio_clk2{
+	clock-frequency = <12288000>;
+};
+
 &ehci0 {
 	dr_mode = "otg";
 	status = "okay";
@@ -90,6 +134,9 @@
 };
 
 &pinctrl {
+	pinctrl-0 = <&sound_clk_pins>;
+	pinctrl-names = "default";
+
 	i2c0_pins: i2c0 {
 		pins = "RIIC0_SDA", "RIIC0_SCL";
 		input-enable;
@@ -110,6 +157,18 @@
 			 <RZG2L_PORT_PINMUX(38, 1, 1)>;	/* RxD */
 	};
 
+	sound_clk_pins: sound_clk {
+		pins = "AUDIO_CLK1", "AUDIO_CLK2";
+		input-enable;
+	};
+
+	ssi0_pins: ssi0 {
+		pinmux = <RZG2L_PORT_PINMUX(45, 0, 1)>, /* BCK */
+			 <RZG2L_PORT_PINMUX(45, 1, 1)>, /* RCK */
+			 <RZG2L_PORT_PINMUX(45, 2, 1)>, /* TXD */
+			 <RZG2L_PORT_PINMUX(45, 3, 1)>; /* RXD */
+	};
+
 	usb0_pins: usb0 {
 		pinmux = <RZG2L_PORT_PINMUX(4, 0, 1)>, /* VBUS */
 			 <RZG2L_PORT_PINMUX(5, 0, 1)>, /* OVC */
@@ -128,6 +187,13 @@
 	status = "okay";
 };
 
+&ssi0 {
+	pinctrl-0 = <&ssi0_pins>;
+	pinctrl-names = "default";
+
+	status = "okay";
+};
+
 &usb2_phy0 {
 	pinctrl-0 = <&usb0_pins>;
 	pinctrl-names = "default";
-- 
2.17.1

[PATCH 4/4] arm64: dts: renesas: rzg2l-smarc: Add Mic routing

[Biju Das]

Add audio routing for Mic with bias to reduce noise when doing
audio capture.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
 arch/arm64/boot/dts/renesas/rzg2l-smarc.dtsi | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/rzg2l-smarc.dtsi b/arch/arm64/boot/dts/renesas/rzg2l-smarc.dtsi
index 1791c21dfe74..39e05169aaaa 100644
--- a/arch/arm64/boot/dts/renesas/rzg2l-smarc.dtsi
+++ b/arch/arm64/boot/dts/renesas/rzg2l-smarc.dtsi
@@ -47,6 +47,12 @@
 		simple-audio-card,frame-master = <&cpu_dai>;
 		simple-audio-card,mclk-fs = <256>;
 
+		simple-audio-card,widgets = "Microphone", "Microphone Jack";
+		simple-audio-card,routing =
+			    "L2", "Mic Bias",
+			    "R2", "Mic Bias",
+			    "Mic Bias", "Microphone Jack";
+
 		cpu_dai: simple-audio-card,cpu {
 			sound-dai = <&ssi0>;
 		};
-- 
2.17.1

Re: [PATCH 1/4] arm64: dts: renesas: r9a07g044: Add DMA support to SSI

[Geert Uytterhoeven]

On Tue, Sep 21, 2021 at 10:46 AM Biju Das <biju.das.jz@bp.renesas.com> wrote:
> Add dmac phandles to SSI nodes to support DMA operation.
>
> Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
i.e. will queue in renesas-devel for v5.16.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

Re: [PATCH 2/4] arm64: dts: renesas: rzg2l-smarc: Add WM8978 sound codec

[Geert Uytterhoeven]

On Tue, Sep 21, 2021 at 10:46 AM Biju Das <biju.das.jz@bp.renesas.com> wrote:
> Add WM8978 sound codec node to RZ/G2L SMARC EVK.
>
> Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
i.e. will queue in renesas-devel for v5.16.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

Re: [PATCH 3/4] arm64: dts: renesas: rzg2l-smarc: Enable audio

[Geert Uytterhoeven]

Hi Biju,

On Tue, Sep 21, 2021 at 10:46 AM Biju Das <biju.das.jz@bp.renesas.com> wrote:
> Enable audio on RZ/G2L SMARC EVK by linking SSI0 with WM8978
> audio CODEC.
>
> Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>

Thanks for your patch!

> --- a/arch/arm64/boot/dts/renesas/rzg2l-smarc.dtsi
> +++ b/arch/arm64/boot/dts/renesas/rzg2l-smarc.dtsi
> @@ -30,6 +66,14 @@
>         };
>  };
>
> +&audio_clk1{
> +       clock-frequency = <11289600>;
> +};
> +
> +&audio_clk2{
> +       clock-frequency = <12288000>;
> +};
> +

These are not fixed-factor clocks, but outputs from a programmable
VersaClock 5P35023 clock generator.  However, we can start with this
simple description, and describe the VersaClock topology later.

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
i.e. will queue in renesas-devel for v5.16.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

Re: [PATCH 4/4] arm64: dts: renesas: rzg2l-smarc: Add Mic routing

[Geert Uytterhoeven]

On Tue, Sep 21, 2021 at 10:46 AM Biju Das <biju.das.jz@bp.renesas.com> wrote:
> Add audio routing for Mic with bias to reduce noise when doing
> audio capture.
>
> Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>

I'm completely illiterate w.r.t. to this, so will queue in
renesas-devel for v5.16,
unless someone objects.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds