Pillgram::Audio - Revision history

Lax: /* TLV320AIC3110 */ add wiki

2025-01-30T21:18:04Z

TLV320AIC3110: add wiki

← Older revision		Revision as of 21:18, 30 January 2025
Line 153:		Line 153:

	Now for my project which involves an Iot device, I don't want to have to include an unsigned device driver that will need DKMS to install with every kernel update, I will redo my PCB hardware oscillator to use a natively supported frequency. I leave as an exercise to the people at TI to write a function that dynamically creates a lookup entry for a random frequency MCLK and playback combo!		Now for my project which involves an Iot device, I don't want to have to include an unsigned device driver that will need DKMS to install with every kernel update, I will redo my PCB hardware oscillator to use a natively supported frequency. I leave as an exercise to the people at TI to write a function that dynamically creates a lookup entry for a random frequency MCLK and playback combo!

			{{Wiki}}

Lax: /* Device Tree */

2025-01-20T20:45:59Z

Device Tree

← Older revision		Revision as of 20:45, 20 January 2025
Line 4:		Line 4:

	== Device Tree ==		== Device Tree ==
	<syntaxhighlight/dts-v1/;		<syntaxhighlight>
			/dts-v1/;
	/plugin/;		/plugin/;

	/ {		/ {
	compatible = "brcm,bcm2712", "brcm,bcm2711", "brcm,bcm2835";		compatible = "brcm,bcm2712", "brcm,bcm2711", "brcm,bcm2835";

Lax: /* Device Tree */ Spacing

2025-01-20T20:45:28Z

Device Tree: Spacing

← Older revision		Revision as of 20:45, 20 January 2025
Line 6:		Line 6:
	<syntaxhighlight/dts-v1/;		<syntaxhighlight/dts-v1/;
	/plugin/;		/plugin/;

	/ {		/ {
	compatible = "brcm,bcm2712", "brcm,bcm2711", "brcm,bcm2835";		compatible = "brcm,bcm2712", "brcm,bcm2711", "brcm,bcm2835";
	// compatible = "brcm,bcm2835";		// compatible = "brcm,bcm2835";

	fragment@0 {		fragment@0 {
	target = <&i2s_clk_consumer>;		target = <&i2s_clk_consumer>;
Line 20:		Line 20:
	};		};
	};		};

	fragment@1 {		fragment@1 {
	target-path = "/";		target-path = "/";
	__overlay__ {		__overlay__ {
	status = "okay";		status = "okay";

	codec_1v8_reg: codec-1v8-reg {		codec_1v8_reg: codec-1v8-reg {
	compatible = "regulator-fixed";		compatible = "regulator-fixed";
Line 43:		Line 43:
	#size-cells = <0>; /* No size cells for I2C devices */		#size-cells = <0>; /* No size cells for I2C devices */
	status = "okay";		status = "okay";

	tlv320aic3110: tlv320aic3110@18 {		tlv320aic3110: tlv320aic3110@18 {
	compatible = "ti-pg,tlv320aic3110", "ti,tlv320aic3110", "ti,tlv320aic311x";		compatible = "ti-pg,tlv320aic3110", "ti,tlv320aic3110", "ti,tlv320aic311x";
Line 51:		Line 51:
	// system-clock-direction-out; // Codec as master		// system-clock-direction-out; // Codec as master
	status = "okay";		status = "okay";

	HPVDD-supply = <&vdd_3v3_reg>;		HPVDD-supply = <&vdd_3v3_reg>;
	SPRVDD-supply = <&vdd_5v0_reg>;		SPRVDD-supply = <&vdd_5v0_reg>;
Line 58:		Line 58:
	IOVDD-supply = <&vdd_3v3_reg>;		IOVDD-supply = <&vdd_3v3_reg>;
	DVDD-supply = <&codec_1v8_reg>;		DVDD-supply = <&codec_1v8_reg>;

	clocks = <&mclk_external>;		clocks = <&mclk_external>;
	clock-names = "mclk";		clock-names = "mclk";
Line 64:		Line 64:
	mclk-frequency = <12288000>;		mclk-frequency = <12288000>;
	// gpio-controller;		// gpio-controller;

	reset-gpios = <&gpio 13 1>; // GPIO 13 as active low reset		reset-gpios = <&gpio 13 1>; // GPIO 13 as active low reset
	reset-delay-us = <10000>; /* 10ms delay */		reset-delay-us = <10000>; /* 10ms delay */

	// Debug properties (must precede subnodes)		// Debug properties (must precede subnodes)
	debug;		debug;
	linux,debug;		linux,debug;

	};		};
	};		};
	};		};

	fragment@3 {		fragment@3 {
	target = <&sound>;		target = <&sound>;
Line 85:		Line 85:
	simple-audio-card,convert-rate = <48000>;		simple-audio-card,convert-rate = <48000>;
	simple-audio-card,mclk-fs = <256>;		simple-audio-card,mclk-fs = <256>;

	simple-audio-card,bitclock-master = <&snd_codec>;		simple-audio-card,bitclock-master = <&snd_codec>;
	simple-audio-card,frame-master = <&snd_codec>;		simple-audio-card,frame-master = <&snd_codec>;

	simple-audio-card,widgets =		simple-audio-card,widgets =
	"Microphone", "Mic Jack",		"Microphone", "Mic Jack",
Line 97:		Line 97:
	"MIC1LP", "Mic Jack",		"MIC1LP", "Mic Jack",
	"MIC1LM", "Mic Jack";		"MIC1LM", "Mic Jack";

	status = "okay";		status = "okay";

	dailink0_master: simple-audio-card,cpu {		dailink0_master: simple-audio-card,cpu {
	sound-dai = <&i2s_clk_consumer>;		sound-dai = <&i2s_clk_consumer>;
Line 105:		Line 105:
	dai-tdm-slot-width = <32>;		dai-tdm-slot-width = <32>;
	};		};

	snd_codec: simple-audio-card,codec {		snd_codec: simple-audio-card,codec {
	sound-dai = <&tlv320aic3110>;		sound-dai = <&tlv320aic3110>;
Line 115:		Line 115:
	};		};
	};		};

	fragment@4 {		fragment@4 {
	target-path = "/";		target-path = "/";
Line 129:		Line 129:
	};		};
	</syntaxhighlight>		</syntaxhighlight>

	== Explanation ==		== Explanation ==
	After carefully reading the source code, I finally found the culprit of my issues. Even if the datasheet suggest I can bypass the PLL if use a proper frequency for MCLK (I chose 12.288Mhz and 11.2896Mhz which divided by 256 gives 48Khz and 41.1Khz), the device driver does not support any arbitrary frequency! They have a bunch of lookup tables for clock rates and playback and if your choice is not present, the driver will fail.		After carefully reading the source code, I finally found the culprit of my issues. Even if the datasheet suggest I can bypass the PLL if use a proper frequency for MCLK (I chose 12.288Mhz and 11.2896Mhz which divided by 256 gives 48Khz and 41.1Khz), the device driver does not support any arbitrary frequency! They have a bunch of lookup tables for clock rates and playback and if your choice is not present, the driver will fail.

Lax: /* TLV320AIC3110 */ Explanation

2025-01-20T20:43:47Z

TLV320AIC3110: Explanation

← Older revision		Revision as of 20:43, 20 January 2025
Line 129:		Line 129:
	};		};
	</syntaxhighlight>		</syntaxhighlight>
			== Explanation ==
			After carefully reading the source code, I finally found the culprit of my issues. Even if the datasheet suggest I can bypass the PLL if use a proper frequency for MCLK (I chose 12.288Mhz and 11.2896Mhz which divided by 256 gives 48Khz and 41.1Khz), the device driver does not support any arbitrary frequency! They have a bunch of lookup tables for clock rates and playback and if your choice is not present, the driver will fail.

			I modified the source code and added the proper lookups for my custom frequencies

			Code: Select all

			/* ADC dividers can be disabled by configuring them to 0 */
			static const struct aic31xx_rate_divs aic31xx_divs[] = {
			...
			/* 11.2896 MHz (11289600 Hz) */
			{ 11289600, 44100, 1, 7, 6800, 128, 8, 2, 128, 8, 2},
			/* 12.288 MHz (12288000 Hz) */
			{ 12288000, 44100, 1, 7, 5264, 128, 8, 2, 128, 8, 2},
			/* 11.2896 MHz (11289600 Hz) */
			{ 11289600, 48000, 1, 7, 6800, 128, 8, 2, 128, 8, 2},
			/* 12.288 MHz (12288000 Hz) */
			{ 12288000, 48000, 1, 8, 1920, 128, 8, 2, 128, 8, 2},

			After a fun fight with Ubuntu to compile this, lo and behold, everything plays!

			Now for my project which involves an Iot device, I don't want to have to include an unsigned device driver that will need DKMS to install with every kernel update, I will redo my PCB hardware oscillator to use a natively supported frequency. I leave as an exercise to the people at TI to write a function that dynamically creates a lookup entry for a random frequency MCLK and playback combo!

Lax: /* Device Tree */ Correct device tree

2025-01-20T20:38:09Z

Device Tree: Correct device tree

Show changes

Lax: /* Schematics */ File with copyright

2025-01-08T23:02:18Z

Schematics: File with copyright

← Older revision		Revision as of 23:02, 8 January 2025
Line 1:		Line 1:
	= TLV320AIC3110 =		= TLV320AIC3110 =
	== Schematics ==		== Schematics ==
	[[File:Tlv320aic3110-schematics.png\|thumb]]		[[File:Tlv320aic3110-schematics-copyright.png\|thumb]]

	== Device Tree ==		== Device Tree ==
	<syntaxhighlight>/dts-v1/;		<syntaxhighlight>/dts-v1/;

Lax: /* Device Tree */ Syntax Highlight

2025-01-08T22:39:04Z

Device Tree: Syntax Highlight

← Older revision		Revision as of 22:39, 8 January 2025
Line 3:		Line 3:
	[[File:Tlv320aic3110-schematics.png\|thumb]]		[[File:Tlv320aic3110-schematics.png\|thumb]]
	== Device Tree ==		== Device Tree ==
	<~~code~~>/dts-v1/;		<syntaxhighlight>/dts-v1/;
	/plugin/;		/plugin/;

	/ {		/ {
	compatible = "brcm,bcm2712", "brcm,bcm2711", "brcm,bcm2835";		compatible = "brcm,bcm2712", "brcm,bcm2711", "brcm,bcm2835";
Line 120:		Line 121:
	};		};
	};		};
	</~~code~~>		</syntaxhighlight>

Lax: /* Device Tree */

2025-01-08T22:38:10Z

Device Tree

← Older revision		Revision as of 22:38, 8 January 2025
Line 4:		Line 4:
	== Device Tree ==		== Device Tree ==
	<code>/dts-v1/;		<code>/dts-v1/;
	/plugin/;		/plugin/;
			/ {
	/ {
	compatible = "brcm,bcm2712", "brcm,bcm2711", "brcm,bcm2835";		compatible = "brcm,bcm2712", "brcm,bcm2711", "brcm,bcm2835";

Lax: /* Device Tree */

2025-01-08T22:35:18Z

Device Tree

← Older revision		Revision as of 22:35, 8 January 2025
Line 5:		Line 5:
	<code>/dts-v1/;		<code>/dts-v1/;
	/plugin/;		/plugin/;

	/ {		/ {
	compatible = "brcm,bcm2712", "brcm,bcm2711", "brcm,bcm2835";		compatible = "brcm,bcm2712", "brcm,bcm2711", "brcm,bcm2835";

	fragment@0 {		fragment@0 {
	target = <&i2s>; // For RPi4		target = <&i2s>; // For RPi4
Line 18:		Line 18:
	};		};
	};		};

	fragment@2 {		fragment@2 {
	target-path = "/";		target-path = "/";
Line 31:		Line 31:
	};		};
	};		};

	fragment@3 {		fragment@3 {
	target = <&i2c1>;		target = <&i2c1>;
Line 38:		Line 38:
	#size-cells = <0>; /* No size cells for I2C devices */		#size-cells = <0>; /* No size cells for I2C devices */
	status = "okay";		status = "okay";

	tlv320aic3110: tlv320aic3110@18 {		tlv320aic3110: tlv320aic3110@18 {
	compatible = "ti,tlv320aic3110", "ti,tlv320aic311x";		compatible = "ti,tlv320aic3110", "ti,tlv320aic311x";
Line 46:		Line 46:
	// system-clock-direction-out; // Codec as master		// system-clock-direction-out; // Codec as master
	status = "okay";		status = "okay";

	HPVDD-supply = <&vdd_3v3_reg>;		HPVDD-supply = <&vdd_3v3_reg>;
	SPRVDD-supply = <&vdd_5v0_reg>;		SPRVDD-supply = <&vdd_5v0_reg>;
Line 53:		Line 53:
	IOVDD-supply = <&vdd_3v3_reg>;		IOVDD-supply = <&vdd_3v3_reg>;
	DVDD-supply = <&codec_1v8_reg>;		DVDD-supply = <&codec_1v8_reg>;

	clocks = <&mclk_external>;		clocks = <&mclk_external>;
	clock-names = "mclk";		clock-names = "mclk";
Line 59:		Line 59:
	mclk-frequency = <12288000>;		mclk-frequency = <12288000>;
	// gpio-controller;		// gpio-controller;

	/* PLL configuration for 48kHz with 12.288MHz MCLK */		/* PLL configuration for 48kHz with 12.288MHz MCLK */
	pll-p = <1>;		pll-p = <1>;
Line 65:		Line 65:
	pll-j = <7>;		pll-j = <7>;
	pll-d = <1680>;		pll-d = <1680>;

	reset-gpios = <&gpio 13 0>; // GPIO 13 as active high		reset-gpios = <&gpio 13 0>; // GPIO 13 as active high
	reset-delay-us = <10000>; /* 10ms delay */		reset-delay-us = <10000>; /* 10ms delay */

	// Debug properties		// Debug properties
	debug;		debug;
Line 75:		Line 75:
	};		};
	};		};

	fragment@5 {		fragment@5 {
	target = <&sound>;		target = <&sound>;
Line 84:		Line 84:
	// simple-audio-card,bitclock-master = <&dailink0_master>;		// simple-audio-card,bitclock-master = <&dailink0_master>;
	// simple-audio-card,frame-master = <&dailink0_master>;		// simple-audio-card,frame-master = <&dailink0_master>;

	simple-audio-card,widgets =		simple-audio-card,widgets =
	"Microphone", "Mic Jack",		"Microphone", "Mic Jack",
Line 95:		Line 95:
	"MIC1LM", "Mic Jack";		"MIC1LM", "Mic Jack";
	status = "okay";		status = "okay";

	simple-audio-card,cpu {		simple-audio-card,cpu {
	sound-dai = <&i2s>;		sound-dai = <&i2s>;
	};		};

	dailink0_master: simple-audio-card,codec {		dailink0_master: simple-audio-card,codec {
	sound-dai = <&tlv320aic3110>;		sound-dai = <&tlv320aic3110>;
Line 106:		Line 106:
	mclk-fs = <256>; //*** added LAX		mclk-fs = <256>; //*** added LAX
	};		};

	};		};
	};		};

	fragment@6 {		fragment@6 {
	target-path = "/";		target-path = "/";
Line 121:		Line 120:
	};		};
	};		};

	};		};
	</code>		</code>

Lax: /* Device Tree */

2025-01-08T22:33:45Z

Device Tree

← Older revision		Revision as of 22:33, 8 January 2025
Line 3:		Line 3:
	[[File:Tlv320aic3110-schematics.png\|thumb]]		[[File:Tlv320aic3110-schematics.png\|thumb]]
	== Device Tree ==		== Device Tree ==
	<~~nowiki~~>/dts-v1/;		<code>/dts-v1/;
	/plugin/;		/plugin/;

Line 123:		Line 123:

	};		};
	</~~nowiki~~>		</code>