[PATCH v4 0/3] ASoC: qcom: allow SM[456]50 HDK board to play audio via I2S

[PATCH v4 0/3] ASoC: qcom: allow SM[456]50 HDK board to play audio via I2S

[Neil Armstrong]

Following [1], this adds the necessary settings to setup
the I2S link to the HDMI bridge to allow audio playback.

All dependencies are merged v7.3-rc1

[1] https://lore.kernel.org/all/20260724182446.1484894-1-mohammad.rafi.shaik@oss.qualcomm.com/

Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
---
Changes in v4:
- Rebased on v7.3-rc1
- Link to v3: https://patch.msgid.link/20260805-topic-sm8x50-next-hdk-i2s-v3-0-07a6483c430f@linaro.org

Changes in v3:
- Fixed node unit number on patch 3
- Link to v2: https://patch.msgid.link/20260731-topic-sm8x50-next-hdk-i2s-v2-0-42c1acee5a2d@linaro.org

Changes in v2:
- Dropped applied patch 1
- Fixed node unit number
- Reversed clock names order to respect bindings
- Link to v1: https://patch.msgid.link/20260728-topic-sm8x50-next-hdk-i2s-v1-0-2393a0fe4aa9@linaro.org

---
Neil Armstrong (3):
      arm64: dts: qcom: sm8450-hdk: Enable I2S for HDMI
      arm64: dts: qcom: sm8550-hdk: Enable I2S for HDMI
      arm64: dts: qcom: sm8650-hdk: Enable I2S for HDMI

 arch/arm64/boot/dts/qcom/sm8450-hdk.dts | 36 +++++++++++++++-
 arch/arm64/boot/dts/qcom/sm8450.dtsi    | 40 ++++++++++++++++++
 arch/arm64/boot/dts/qcom/sm8550-hdk.dts | 36 +++++++++++++++-
 arch/arm64/boot/dts/qcom/sm8550.dtsi    | 73 +++++++++++++++++++++++++++++++++
 arch/arm64/boot/dts/qcom/sm8650-hdk.dts | 35 +++++++++++++++-
 arch/arm64/boot/dts/qcom/sm8650.dtsi    | 40 ++++++++++++++++++
 6 files changed, 257 insertions(+), 3 deletions(-)
---
base-commit: cee9395acd8043be0644b25c34bfa86623f2b935
change-id: 20260728-topic-sm8x50-next-hdk-i2s-6d63c25eceac

Best regards,
--  
Neil Armstrong <neil.armstrong@linaro.org>

[PATCH v4 1/3] arm64: dts: qcom: sm8450-hdk: Enable I2S for HDMI

[Neil Armstrong]

Add the necessary nodes to configure the right I2S interface
to output audio via the DSI HDMI bridge.

Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
---
 arch/arm64/boot/dts/qcom/sm8450-hdk.dts | 36 ++++++++++++++++++++++++++++-
 arch/arm64/boot/dts/qcom/sm8450.dtsi    | 40 +++++++++++++++++++++++++++++++++
 2 files changed, 75 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/qcom/sm8450-hdk.dts b/arch/arm64/boot/dts/qcom/sm8450-hdk.dts
index 4ade28f40cae..9b55d17869b4 100644
--- a/arch/arm64/boot/dts/qcom/sm8450-hdk.dts
+++ b/arch/arm64/boot/dts/qcom/sm8450-hdk.dts
@@ -665,7 +665,12 @@ lt9611_codec: hdmi-bridge@2b {
 		vcc-supply = <&lt9611_3v3>;
 
 		pinctrl-names = "default";
-		pinctrl-0 = <&lt9611_irq_pin &lt9611_rst_pin>;
+		pinctrl-0 = <&lt9611_irq_pin>,
+			    <&lt9611_rst_pin>,
+			    <&i2s0_default_state>,
+			    <&audio_mclk0_default_state>;
+
+		#sound-dai-cells = <1>;
 
 		ports {
 			#address-cells = <1>;
@@ -947,6 +952,19 @@ channel@44b {
 	};
 };
 
+&q6apmbedai {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	dai@10 {
+		reg = <PRIMARY_MI2S_RX>;
+		clocks = <&q6prmcc LPASS_CLK_ID_PRI_MI2S_IBIT LPASS_CLK_ATTRIBUTE_COUPLE_NO>,
+			 <&q6prmcc LPASS_CLK_ID_MCLK_1 LPASS_CLK_ATTRIBUTE_COUPLE_NO>;
+		clock-names = "bclk",
+			      "mclk";
+	};
+};
+
 &remoteproc_adsp {
 	status = "okay";
 	firmware-name = "qcom/sm8450/adsp.mbn";
@@ -1079,6 +1097,22 @@ platform {
 			sound-dai = <&q6apm>;
 		};
 	};
+
+	prim-mi2s-dai-link {
+		link-name = "HDMI Playback";
+
+		cpu {
+			sound-dai = <&q6apmbedai PRIMARY_MI2S_RX>;
+		};
+
+		codec {
+			sound-dai = <&lt9611_codec 0>;
+		};
+
+		platform {
+			sound-dai = <&q6apm>;
+		};
+	};
 };
 
 &swr0 {
diff --git a/arch/arm64/boot/dts/qcom/sm8450.dtsi b/arch/arm64/boot/dts/qcom/sm8450.dtsi
index b8793482b181..a5d5eefa4e9e 100644
--- a/arch/arm64/boot/dts/qcom/sm8450.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8450.dtsi
@@ -4300,6 +4300,46 @@ qup_uart20_default: qup-uart20-default-state {
 				pins = "gpio76", "gpio77", "gpio78", "gpio79";
 				function = "qup20";
 			};
+
+			audio_mclk0_default_state: audio-mclk0-default-state {
+				pins = "gpio125";
+				function = "pri_mi2s";
+				drive-strength = <8>;
+				bias-disable;
+				output-high;
+			};
+
+			i2s0_default_state: i2s0-default-state {
+				sck-pins {
+					pins = "gpio126";
+					function = "mi2s0_sck";
+					drive-strength = <8>;
+					bias-disable;
+					output-high;
+				};
+
+				data0-pins {
+					pins = "gpio127";
+					function = "mi2s0_data0";
+					drive-strength = <8>;
+					bias-disable;
+				};
+
+				data1-pins {
+					pins = "gpio128";
+					function = "mi2s0_data1";
+					drive-strength = <8>;
+					bias-disable;
+				};
+
+				ws-pins {
+					pins = "gpio129";
+					function = "mi2s0_ws";
+					drive-strength = <8>;
+					bias-disable;
+					output-high;
+				};
+			};
 		};
 
 		lpass_tlmm: pinctrl@3440000 {

-- 
2.34.1

[PATCH v4 2/3] arm64: dts: qcom: sm8550-hdk: Enable I2S for HDMI

[Neil Armstrong]

Add the necessary nodes to configure the right I2S interface
to output audio via the DSI HDMI bridge.

Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
---
 arch/arm64/boot/dts/qcom/sm8550-hdk.dts | 36 +++++++++++++++-
 arch/arm64/boot/dts/qcom/sm8550.dtsi    | 73 +++++++++++++++++++++++++++++++++
 2 files changed, 108 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/qcom/sm8550-hdk.dts b/arch/arm64/boot/dts/qcom/sm8550-hdk.dts
index 82fb10ed6b6b..88a256499c55 100644
--- a/arch/arm64/boot/dts/qcom/sm8550-hdk.dts
+++ b/arch/arm64/boot/dts/qcom/sm8550-hdk.dts
@@ -278,6 +278,22 @@ platform {
 				sound-dai = <&q6apm>;
 			};
 		};
+
+		prim-mi2s-dai-link {
+			link-name = "HDMI Playback";
+
+			cpu {
+				sound-dai = <&q6apmbedai PRIMARY_MI2S_RX>;
+			};
+
+			codec {
+				sound-dai = <&lt9611_codec 0>;
+			};
+
+			platform {
+				sound-dai = <&q6apm>;
+			};
+		};
 	};
 
 	thermal-zones {
@@ -974,9 +990,14 @@ lt9611_codec: hdmi-bridge@2b {
 		vdd-supply = <&lt9611_1v2>;
 		vcc-supply = <&lt9611_3v3>;
 
-		pinctrl-0 = <&lt9611_irq_pin>, <&lt9611_rst_pin>;
+		pinctrl-0 = <&lt9611_irq_pin>,
+			    <&lt9611_rst_pin>,
+			    <&i2s0_default_state>,
+			    <&audio_mclk0_default_state>;
 		pinctrl-names = "default";
 
+		#sound-dai-cells = <1>;
+
 		ports {
 			#address-cells = <1>;
 			#size-cells = <0>;
@@ -1419,6 +1440,19 @@ pmk8550_sleep_clk: sleep-clk-state {
 	};
 };
 
+&q6apmbedai {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	dai@10 {
+		reg = <PRIMARY_MI2S_RX>;
+		clocks = <&q6prmcc LPASS_CLK_ID_PRI_MI2S_IBIT LPASS_CLK_ATTRIBUTE_COUPLE_NO>,
+			 <&q6prmcc LPASS_CLK_ID_MCLK_1 LPASS_CLK_ATTRIBUTE_COUPLE_NO>;
+		clock-names = "bclk",
+			      "mclk";
+	};
+};
+
 &qupv3_id_0 {
 	status = "okay";
 };
diff --git a/arch/arm64/boot/dts/qcom/sm8550.dtsi b/arch/arm64/boot/dts/qcom/sm8550.dtsi
index 0e701e709235..94420ed440c5 100644
--- a/arch/arm64/boot/dts/qcom/sm8550.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8550.dtsi
@@ -5541,6 +5541,79 @@ data-pins {
 					drive-strength = <10>;
 				};
 			};
+
+			audio_mclk0_default_state: audio-mclk0-default-state {
+				pins = "gpio125";
+				function = "audio_ext_mclk0";
+				drive-strength = <8>;
+				bias-disable;
+				output-high;
+			};
+
+			i2s0_default_state: i2s0-default-state {
+				sck-pins {
+					pins = "gpio126";
+					function = "i2s0_sck";
+					drive-strength = <8>;
+					bias-disable;
+					output-high;
+				};
+
+				data0-pins {
+					pins = "gpio127";
+					function = "i2s0_data0";
+					drive-strength = <8>;
+					bias-disable;
+				};
+
+				data1-pins {
+					pins = "gpio128";
+					function = "i2s0_data1";
+					drive-strength = <8>;
+					bias-disable;
+				};
+
+				ws-pins {
+					pins = "gpio129";
+					function = "i2s0_ws";
+					drive-strength = <8>;
+					bias-disable;
+					output-high;
+				};
+			};
+
+			audio_mclk1_default_state: audio-mclk1-default-state {
+				pins = "gpio124";
+				function = "audio_ext_mclk1";
+				drive-strength = <8>;
+				bias-disable;
+				output-high;
+			};
+
+			i2s1_default_state: i2s1-default-state {
+				sck-pins {
+					pins = "gpio121";
+					function = "i2s1_sck";
+					drive-strength = <8>;
+					bias-disable;
+					output-high;
+				};
+
+				data0-pins {
+					pins = "gpio122";
+					function = "i2s1_data0";
+					drive-strength = <8>;
+					bias-disable;
+				};
+
+				ws-pins {
+					pins = "gpio123";
+					function = "i2s1_ws";
+					drive-strength = <8>;
+					bias-disable;
+					output-high;
+				};
+			};
 		};
 
 		sram@14680000 {

-- 
2.34.1

[PATCH v4 3/3] arm64: dts: qcom: sm8650-hdk: Enable I2S for HDMI

[Neil Armstrong]

Add the necessary nodes to configure the right I2S interface
to output audio via the DSI HDMI bridge.

Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
---
 arch/arm64/boot/dts/qcom/sm8650-hdk.dts | 35 ++++++++++++++++++++++++++++-
 arch/arm64/boot/dts/qcom/sm8650.dtsi    | 40 +++++++++++++++++++++++++++++++++
 2 files changed, 74 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/qcom/sm8650-hdk.dts b/arch/arm64/boot/dts/qcom/sm8650-hdk.dts
index 41d0c7edc433..eb47a75a94bd 100644
--- a/arch/arm64/boot/dts/qcom/sm8650-hdk.dts
+++ b/arch/arm64/boot/dts/qcom/sm8650-hdk.dts
@@ -218,6 +218,22 @@ platform {
 				sound-dai = <&q6apm>;
 			};
 		};
+
+		pri-mi2s-dai-link {
+			link-name = "HDMI Playback";
+
+			cpu {
+				sound-dai = <&q6apmbedai PRIMARY_MI2S_RX>;
+			};
+
+			codec {
+				sound-dai = <&lt9611_codec 0>;
+			};
+
+			platform {
+				sound-dai = <&q6apm>;
+			};
+		};
 	};
 
 	thermal-zones {
@@ -939,6 +955,7 @@ &i2c6 {
 	lt9611_codec: hdmi-bridge@2b {
 		compatible = "lontium,lt9611uxc";
 		reg = <0x2b>;
+		#sound-dai-cells = <1>;
 
 		interrupts-extended = <&tlmm 85 IRQ_TYPE_EDGE_FALLING>;
 
@@ -947,7 +964,10 @@ lt9611_codec: hdmi-bridge@2b {
 		vdd-supply = <&lt9611_1v2>;
 		vcc-supply = <&lt9611_3v3>;
 
-		pinctrl-0 = <&lt9611_irq_pin>, <&lt9611_rst_pin>;
+		pinctrl-0 = <&lt9611_irq_pin>,
+			    <&lt9611_rst_pin>,
+			    <&i2s0_default_state>,
+			    <&audio_mclk0_default_state>;
 		pinctrl-names = "default";
 
 		ports {
@@ -1348,6 +1368,19 @@ &pon_resin {
 	status = "okay";
 };
 
+&q6apmbedai {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	dai@10 {
+		reg = <PRIMARY_MI2S_RX>;
+		clocks = <&q6prmcc LPASS_CLK_ID_PRI_MI2S_IBIT LPASS_CLK_ATTRIBUTE_COUPLE_NO>,
+			 <&q6prmcc LPASS_CLK_ID_MCLK_1 LPASS_CLK_ATTRIBUTE_COUPLE_NO>;
+		clock-names = "bclk",
+			      "mclk";
+	};
+};
+
 &qup_i2c3_data_clk {
 	/* Use internal I2C pull-up */
 	bias-pull-up = <2200>;
diff --git a/arch/arm64/boot/dts/qcom/sm8650.dtsi b/arch/arm64/boot/dts/qcom/sm8650.dtsi
index b679fd8afb7d..4a7b934e15ff 100644
--- a/arch/arm64/boot/dts/qcom/sm8650.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8650.dtsi
@@ -6609,6 +6609,46 @@ wake-pins {
 				};
 			};
 
+			audio_mclk0_default_state: audio-mclk0-default-state {
+				pins = "gpio125";
+				function = "audio_ext_mclk0";
+				drive-strength = <8>;
+				bias-disable;
+				output-high;
+			};
+
+			i2s0_default_state: i2s0-default-state {
+				sck-pins {
+					pins = "gpio126";
+					function = "i2s0_sck";
+					drive-strength = <8>;
+					bias-disable;
+					output-high;
+				};
+
+				data0-pins {
+					pins = "gpio127";
+					function = "i2s0_data0";
+					drive-strength = <8>;
+					bias-disable;
+				};
+
+				data1-pins {
+					pins = "gpio128";
+					function = "i2s0_data1";
+					drive-strength = <8>;
+					bias-disable;
+				};
+
+				ws-pins {
+					pins = "gpio129";
+					function = "i2s0_ws";
+					drive-strength = <8>;
+					bias-disable;
+					output-high;
+				};
+			};
+
 			qup_i2c0_data_clk: qup-i2c0-data-clk-state {
 				/* SDA, SCL */
 				pins = "gpio32", "gpio33";

-- 
2.34.1

Re: [PATCH v4 1/3] arm64: dts: qcom: sm8450-hdk: Enable I2S for HDMI

[sashiko-bot]

Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
- [Medium] The SoC I2S and MCLK pin configurations are improperly assigned to the external I2C HDMI bridge (`lt9611_codec`) node.
--

commit 1b83d3e4ad09bc9890002381b80f159a3782e66d
Author: Neil Armstrong <neil.armstrong@linaro.org>

arm64: dts: qcom: sm8450-hdk: Enable I2S for HDMI

This commit adds the necessary device tree nodes to configure the I2S
interface to output audio via the DSI HDMI bridge. It updates the
external lt9611uxc bridge node and links the primary MI2S DAI.

> diff --git a/arch/arm64/boot/dts/qcom/sm8450-hdk.dts b/arch/arm64/boot/dts/qcom/sm8450-hdk.dts
> index 4ade28f40cae0..9b55d17869b49 100644
> --- a/arch/arm64/boot/dts/qcom/sm8450-hdk.dts
> +++ b/arch/arm64/boot/dts/qcom/sm8450-hdk.dts
> @@ -665,7 +665,12 @@ lt9611_codec: hdmi-bridge@2b {
>  		vcc-supply = <&lt9611_3v3>;
>  
>  		pinctrl-names = "default";
> -		pinctrl-0 = <&lt9611_irq_pin &lt9611_rst_pin>;
> +		pinctrl-0 = <&lt9611_irq_pin>,
> +			    <&lt9611_rst_pin>,
> +			    <&i2s0_default_state>,
> +			    <&audio_mclk0_default_state>;

[Severity: Medium]
Should the SoC's I2S and MCLK pin configurations be assigned to the external
lt9611uxc HDMI bridge node?

Since the lt9611uxc is an external I2C display bridge rather than the SoC's
LPASS I2S interface, assigning the audio pinmux states here means the pins
are permanently configured when the display bridge probes. This bypasses the
SoC's audio controller (like the q6apmbedai CPU DAI or sound node),
preventing it from managing its own pins' power states when audio is inactive.

Could these audio pinctrl states be moved to the sound card node or its
relevant sub-node instead?

[ ... ]

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260831-topic-sm8x50-next-hdk-i2s-v4-0-a224aa073f9d@linaro.org?part=1

Re: [PATCH v4 0/3] ASoC: qcom: allow SM[456]50 HDK board to play audio via I2S

[Neil Armstrong]

Hi,

On 8/31/26 11:13, Neil Armstrong wrote:
> Following [1], this adds the necessary settings to setup
> the I2S link to the HDMI bridge to allow audio playback.
> 
> All dependencies are merged v7.3-rc1
> 
> [1] https://lore.kernel.org/all/20260724182446.1484894-1-mohammad.rafi.shaik@oss.qualcomm.com/
> 
> Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
> ---
> Changes in v4:
> - Rebased on v7.3-rc1
> - Link to v3: https://patch.msgid.link/20260805-topic-sm8x50-next-hdk-i2s-v3-0-07a6483c430f@linaro.org
> 
> Changes in v3:
> - Fixed node unit number on patch 3
> - Link to v2: https://patch.msgid.link/20260731-topic-sm8x50-next-hdk-i2s-v2-0-42c1acee5a2d@linaro.org
> 
> Changes in v2:
> - Dropped applied patch 1
> - Fixed node unit number
> - Reversed clock names order to respect bindings
> - Link to v1: https://patch.msgid.link/20260728-topic-sm8x50-next-hdk-i2s-v1-0-2393a0fe4aa9@linaro.org
> 
> ---
> Neil Armstrong (3):
>        arm64: dts: qcom: sm8450-hdk: Enable I2S for HDMI
>        arm64: dts: qcom: sm8550-hdk: Enable I2S for HDMI
>        arm64: dts: qcom: sm8650-hdk: Enable I2S for HDMI

Gentle ping, this has been out for a while and the related ASoC changes were merged fro v7.3 already.

Thanks,
Neil

> 
>   arch/arm64/boot/dts/qcom/sm8450-hdk.dts | 36 +++++++++++++++-
>   arch/arm64/boot/dts/qcom/sm8450.dtsi    | 40 ++++++++++++++++++
>   arch/arm64/boot/dts/qcom/sm8550-hdk.dts | 36 +++++++++++++++-
>   arch/arm64/boot/dts/qcom/sm8550.dtsi    | 73 +++++++++++++++++++++++++++++++++
>   arch/arm64/boot/dts/qcom/sm8650-hdk.dts | 35 +++++++++++++++-
>   arch/arm64/boot/dts/qcom/sm8650.dtsi    | 40 ++++++++++++++++++
>   6 files changed, 257 insertions(+), 3 deletions(-)
> ---
> base-commit: cee9395acd8043be0644b25c34bfa86623f2b935
> change-id: 20260728-topic-sm8x50-next-hdk-i2s-6d63c25eceac
> 
> Best regards,
> --
> Neil Armstrong <neil.armstrong@linaro.org>
>