[PATCH v2 0/5] Add DisplayPort sound support for Fairphone 5 smartphone

[PATCH v2 0/5] Add DisplayPort sound support for Fairphone 5 smartphone

[Luca Weiss]

Add the necessary sound card bits and some dts additions to enable sound
over DisplayPort-over-USB-C, e.g. to a connected TV or monitor.

The UCM files can be found here:
https://gitlab.postmarketos.org/postmarketOS/pmaports/-/tree/master/device/testing/device-fairphone-fp5/ucm

This series - in spirit - depends on the series enabling DisplayPort in
the first place, but can land pretty independently, especially the ASoC
bits:
https://lore.kernel.org/linux-arm-msm/20250312-fp5-pmic-glink-dp-v2-0-a55927749d77@fairphone.com/

Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
---
Changes in v2:
- Revamp series based on comments on v1, doesn't have much too much in
  common anymore
- Use sm8250 instead of sc8280xp sndcard file, so port other required
  changes from sc8280xp.c to sm8250.c
- This also changes the sound card compatible to from
  qcom,qcm6490-sndcard to fairphone,fp5-sndcard
- Link to v1: https://lore.kernel.org/r/20240809-fp5-dp-sound-v1-0-d7ba2c24f6b9@fairphone.com

---
Luca Weiss (5):
      ASoC: dt-bindings: qcom,sm8250: Add Fairphone 5 sound card
      ASoC: qcom: sm8250: set card driver name from match data
      ASoC: qcom: sm8250: add DisplayPort Jack support
      ASoC: qcom: sm8250: Add Fairphone 5 soundcard compatible
      arm64: dts: qcom: qcm6490-fairphone-fp5: Add DisplayPort sound support

 .../devicetree/bindings/sound/qcom,sm8250.yaml     |  1 +
 arch/arm64/boot/dts/qcom/qcm6490-fairphone-fp5.dts | 31 ++++++++++++++++++++++
 sound/soc/qcom/sm8250.c                            | 28 +++++++++++--------
 3 files changed, 49 insertions(+), 11 deletions(-)
---
base-commit: 7f1dd4e6634d085f3c9652d4e0f1903659fb96f9
change-id: 20240809-fp5-dp-sound-b3768f3019bd

Best regards,
-- 
Luca Weiss <luca.weiss@fairphone.com>

[PATCH v2 1/5] ASoC: dt-bindings: qcom,sm8250: Add Fairphone 5 sound card

[Luca Weiss]

Document the bindings for the sound card on Fairphone 5 which uses the
older non-audioreach audio architecture.

Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
---
 Documentation/devicetree/bindings/sound/qcom,sm8250.yaml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/sound/qcom,sm8250.yaml b/Documentation/devicetree/bindings/sound/qcom,sm8250.yaml
index 4e208cb7f6c61adfd4b687227038d275f849480a..57f62a228c262f38e703816efdcf443355052619 100644
--- a/Documentation/devicetree/bindings/sound/qcom,sm8250.yaml
+++ b/Documentation/devicetree/bindings/sound/qcom,sm8250.yaml
@@ -28,6 +28,7 @@ properties:
               - qcom,sm8750-sndcard
           - const: qcom,sm8450-sndcard
       - enum:
+          - fairphone,fp5-sndcard
           - qcom,apq8096-sndcard
           - qcom,qcm6490-idp-sndcard
           - qcom,qcs6490-rb3gen2-sndcard

-- 
2.49.0

Re: [PATCH v2 1/5] ASoC: dt-bindings: qcom,sm8250: Add Fairphone 5 sound card

[Rob Herring (Arm)]

On Fri, 18 Apr 2025 15:13:42 +0200, Luca Weiss wrote:
> Document the bindings for the sound card on Fairphone 5 which uses the
> older non-audioreach audio architecture.
> 
> Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
> ---
>  Documentation/devicetree/bindings/sound/qcom,sm8250.yaml | 1 +
>  1 file changed, 1 insertion(+)
> 

Acked-by: Rob Herring (Arm) <robh@kernel.org>

[PATCH v2 2/5] ASoC: qcom: sm8250: set card driver name from match data

[Luca Weiss]

Sound machine drivers for Qualcomm SoCs can be reused across multiple
SoCs. But user space ALSA UCM files depend on the card driver name which
should be set per board/SoC.

Allow such customization by using driver match data as sound card driver
name.

Also while we're already touching these lines, sort the compatibles
alphabetically.

Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
---
 sound/soc/qcom/sm8250.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/sound/soc/qcom/sm8250.c b/sound/soc/qcom/sm8250.c
index b70b2a5031dfbf69024666f8a1049c263efcde0a..e920b413b762c803cfcc4049f35deba828275478 100644
--- a/sound/soc/qcom/sm8250.c
+++ b/sound/soc/qcom/sm8250.c
@@ -16,7 +16,6 @@
 #include "usb_offload_utils.h"
 #include "sdw.h"
 
-#define DRIVER_NAME		"sm8250"
 #define MI2S_BCLK_RATE		1536000
 
 struct sm8250_snd_data {
@@ -200,15 +199,15 @@ static int sm8250_platform_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	card->driver_name = DRIVER_NAME;
+	card->driver_name = of_device_get_match_data(dev);
 	sm8250_add_be_ops(card);
 	return devm_snd_soc_register_card(dev, card);
 }
 
 static const struct of_device_id snd_sm8250_dt_match[] = {
-	{.compatible = "qcom,sm8250-sndcard"},
-	{.compatible = "qcom,qrb4210-rb2-sndcard"},
-	{.compatible = "qcom,qrb5165-rb5-sndcard"},
+	{ .compatible = "qcom,qrb4210-rb2-sndcard", .data = "sm8250" },
+	{ .compatible = "qcom,qrb5165-rb5-sndcard", .data = "sm8250" },
+	{ .compatible = "qcom,sm8250-sndcard", .data = "sm8250" },
 	{}
 };
 

-- 
2.49.0

Re: [PATCH v2 2/5] ASoC: qcom: sm8250: set card driver name from match data

[neil.armstrong]

On 18/04/2025 15:13, Luca Weiss wrote:
> Sound machine drivers for Qualcomm SoCs can be reused across multiple
> SoCs. But user space ALSA UCM files depend on the card driver name which
> should be set per board/SoC.
> 
> Allow such customization by using driver match data as sound card driver
> name.
> 
> Also while we're already touching these lines, sort the compatibles
> alphabetically.
> 
> Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
> ---
>   sound/soc/qcom/sm8250.c | 9 ++++-----
>   1 file changed, 4 insertions(+), 5 deletions(-)
> 
> diff --git a/sound/soc/qcom/sm8250.c b/sound/soc/qcom/sm8250.c
> index b70b2a5031dfbf69024666f8a1049c263efcde0a..e920b413b762c803cfcc4049f35deba828275478 100644
> --- a/sound/soc/qcom/sm8250.c
> +++ b/sound/soc/qcom/sm8250.c
> @@ -16,7 +16,6 @@
>   #include "usb_offload_utils.h"
>   #include "sdw.h"
>   
> -#define DRIVER_NAME		"sm8250"
>   #define MI2S_BCLK_RATE		1536000
>   
>   struct sm8250_snd_data {
> @@ -200,15 +199,15 @@ static int sm8250_platform_probe(struct platform_device *pdev)
>   	if (ret)
>   		return ret;
>   
> -	card->driver_name = DRIVER_NAME;
> +	card->driver_name = of_device_get_match_data(dev);
>   	sm8250_add_be_ops(card);
>   	return devm_snd_soc_register_card(dev, card);
>   }
>   
>   static const struct of_device_id snd_sm8250_dt_match[] = {
> -	{.compatible = "qcom,sm8250-sndcard"},
> -	{.compatible = "qcom,qrb4210-rb2-sndcard"},
> -	{.compatible = "qcom,qrb5165-rb5-sndcard"},
> +	{ .compatible = "qcom,qrb4210-rb2-sndcard", .data = "sm8250" },
> +	{ .compatible = "qcom,qrb5165-rb5-sndcard", .data = "sm8250" },
> +	{ .compatible = "qcom,sm8250-sndcard", .data = "sm8250" },
>   	{}
>   };
>   
> 

Thanks :-)

Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>

Re: [PATCH v2 2/5] ASoC: qcom: sm8250: set card driver name from match data

[Dmitry Baryshkov]

On Fri, Apr 18, 2025 at 03:13:43PM +0200, Luca Weiss wrote:
> Sound machine drivers for Qualcomm SoCs can be reused across multiple
> SoCs. But user space ALSA UCM files depend on the card driver name which
> should be set per board/SoC.
> 
> Allow such customization by using driver match data as sound card driver
> name.
> 
> Also while we're already touching these lines, sort the compatibles
> alphabetically.
> 
> Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
> ---
>  sound/soc/qcom/sm8250.c | 9 ++++-----
>  1 file changed, 4 insertions(+), 5 deletions(-)
> 

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>

-- 
With best wishes
Dmitry

[PATCH v2 3/5] ASoC: qcom: sm8250: add DisplayPort Jack support

[Luca Weiss]

Add support for DisplayPort Jack events, so that user space can
configure the audio routing correctly.

Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
---
 sound/soc/qcom/sm8250.c | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/sound/soc/qcom/sm8250.c b/sound/soc/qcom/sm8250.c
index e920b413b762c803cfcc4049f35deba828275478..aa3b4bc3fcc7b8a8dccc75ef1309bb26a2a8105a 100644
--- a/sound/soc/qcom/sm8250.c
+++ b/sound/soc/qcom/sm8250.c
@@ -25,6 +25,7 @@ struct sm8250_snd_data {
 	struct snd_soc_jack jack;
 	struct snd_soc_jack usb_offload_jack;
 	bool usb_offload_jack_setup;
+	struct snd_soc_jack dp_jack;
 	bool jack_setup;
 };
 
@@ -34,12 +35,17 @@ static int sm8250_snd_init(struct snd_soc_pcm_runtime *rtd)
 	struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
 	int ret;
 
-	if (cpu_dai->id == USB_RX)
-		ret = qcom_snd_usb_offload_jack_setup(rtd, &data->usb_offload_jack,
-						      &data->usb_offload_jack_setup);
-	else
-		ret = qcom_snd_wcd_jack_setup(rtd, &data->jack, &data->jack_setup);
-	return ret;
+	switch (cpu_dai->id) {
+	case DISPLAY_PORT_RX:
+		return qcom_snd_dp_jack_setup(rtd, &data->dp_jack, 0);
+	case USB_RX:
+		return qcom_snd_usb_offload_jack_setup(rtd, &data->usb_offload_jack,
+						       &data->usb_offload_jack_setup);
+	default:
+		break;
+	}
+
+	return qcom_snd_wcd_jack_setup(rtd, &data->jack, &data->jack_setup);
 }
 
 static void sm8250_snd_exit(struct snd_soc_pcm_runtime *rtd)

-- 
2.49.0

Re: [PATCH v2 3/5] ASoC: qcom: sm8250: add DisplayPort Jack support

[Dmitry Baryshkov]

On Fri, Apr 18, 2025 at 03:13:44PM +0200, Luca Weiss wrote:
> Add support for DisplayPort Jack events, so that user space can
> configure the audio routing correctly.
> 
> Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
> ---
>  sound/soc/qcom/sm8250.c | 18 ++++++++++++------
>  1 file changed, 12 insertions(+), 6 deletions(-)
> 
> diff --git a/sound/soc/qcom/sm8250.c b/sound/soc/qcom/sm8250.c
> index e920b413b762c803cfcc4049f35deba828275478..aa3b4bc3fcc7b8a8dccc75ef1309bb26a2a8105a 100644
> --- a/sound/soc/qcom/sm8250.c
> +++ b/sound/soc/qcom/sm8250.c
> @@ -25,6 +25,7 @@ struct sm8250_snd_data {
>  	struct snd_soc_jack jack;
>  	struct snd_soc_jack usb_offload_jack;
>  	bool usb_offload_jack_setup;
> +	struct snd_soc_jack dp_jack;
>  	bool jack_setup;
>  };
>  
> @@ -34,12 +35,17 @@ static int sm8250_snd_init(struct snd_soc_pcm_runtime *rtd)
>  	struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
>  	int ret;
>  
> -	if (cpu_dai->id == USB_RX)
> -		ret = qcom_snd_usb_offload_jack_setup(rtd, &data->usb_offload_jack,
> -						      &data->usb_offload_jack_setup);
> -	else
> -		ret = qcom_snd_wcd_jack_setup(rtd, &data->jack, &data->jack_setup);
> -	return ret;
> +	switch (cpu_dai->id) {
> +	case DISPLAY_PORT_RX:
> +		return qcom_snd_dp_jack_setup(rtd, &data->dp_jack, 0);
> +	case USB_RX:
> +		return qcom_snd_usb_offload_jack_setup(rtd, &data->usb_offload_jack,
> +						       &data->usb_offload_jack_setup);
> +	default:
> +		break;

I'd say, just move return qcom_snd_wcd_jack_setup here.

> +	}
> +
> +	return qcom_snd_wcd_jack_setup(rtd, &data->jack, &data->jack_setup);
>  }
>  
>  static void sm8250_snd_exit(struct snd_soc_pcm_runtime *rtd)
> 
> -- 
> 2.49.0
> 

-- 
With best wishes
Dmitry

[PATCH v2 4/5] ASoC: qcom: sm8250: Add Fairphone 5 soundcard compatible

[Luca Weiss]

Add a compatible for the QCM6490-based Fairphone 5 which can use this
machine driver.

As a note, QCM6490 RB3 board is using audioreach architecture while
Fairphone 5 uses pre-audioreach.

Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
---
 sound/soc/qcom/sm8250.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/soc/qcom/sm8250.c b/sound/soc/qcom/sm8250.c
index aa3b4bc3fcc7b8a8dccc75ef1309bb26a2a8105a..ec5372e18a9c9bc6a80412adcc5ec473e9730620 100644
--- a/sound/soc/qcom/sm8250.c
+++ b/sound/soc/qcom/sm8250.c
@@ -211,6 +211,7 @@ static int sm8250_platform_probe(struct platform_device *pdev)
 }
 
 static const struct of_device_id snd_sm8250_dt_match[] = {
+	{ .compatible = "fairphone,fp5-sndcard", .data = "qcm6490" },
 	{ .compatible = "qcom,qrb4210-rb2-sndcard", .data = "sm8250" },
 	{ .compatible = "qcom,qrb5165-rb5-sndcard", .data = "sm8250" },
 	{ .compatible = "qcom,sm8250-sndcard", .data = "sm8250" },

-- 
2.49.0

Re: [PATCH v2 4/5] ASoC: qcom: sm8250: Add Fairphone 5 soundcard compatible

[neil.armstrong]

On 18/04/2025 15:13, Luca Weiss wrote:
> Add a compatible for the QCM6490-based Fairphone 5 which can use this
> machine driver.
> 
> As a note, QCM6490 RB3 board is using audioreach architecture while
> Fairphone 5 uses pre-audioreach.
> 
> Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
> ---
>   sound/soc/qcom/sm8250.c | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/sound/soc/qcom/sm8250.c b/sound/soc/qcom/sm8250.c
> index aa3b4bc3fcc7b8a8dccc75ef1309bb26a2a8105a..ec5372e18a9c9bc6a80412adcc5ec473e9730620 100644
> --- a/sound/soc/qcom/sm8250.c
> +++ b/sound/soc/qcom/sm8250.c
> @@ -211,6 +211,7 @@ static int sm8250_platform_probe(struct platform_device *pdev)
>   }
>   
>   static const struct of_device_id snd_sm8250_dt_match[] = {
> +	{ .compatible = "fairphone,fp5-sndcard", .data = "qcm6490" },
>   	{ .compatible = "qcom,qrb4210-rb2-sndcard", .data = "sm8250" },
>   	{ .compatible = "qcom,qrb5165-rb5-sndcard", .data = "sm8250" },
>   	{ .compatible = "qcom,sm8250-sndcard", .data = "sm8250" },
> 

Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>

Re: [PATCH v2 4/5] ASoC: qcom: sm8250: Add Fairphone 5 soundcard compatible

[Dmitry Baryshkov]

On Fri, Apr 18, 2025 at 03:13:45PM +0200, Luca Weiss wrote:
> Add a compatible for the QCM6490-based Fairphone 5 which can use this
> machine driver.
> 
> As a note, QCM6490 RB3 board is using audioreach architecture while
> Fairphone 5 uses pre-audioreach.
> 
> Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
> ---
>  sound/soc/qcom/sm8250.c | 1 +
>  1 file changed, 1 insertion(+)
> 

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>

-- 
With best wishes
Dmitry

[PATCH v2 5/5] arm64: dts: qcom: qcm6490-fairphone-fp5: Add DisplayPort sound support

[Luca Weiss]

Add the required nodes for sound playback via a connected external
display (DisplayPort over USB-C).

In user space just the following route needs to be set (e.g. using
ALSA UCM):

  amixer -c0 cset name='DISPLAY_PORT_RX Audio Mixer MultiMedia1' 1

Afterwards one can play audio on the MultiMedia1 sound device, e.g.:

  aplay -D plughw:0,0 test.wav

Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
---
 arch/arm64/boot/dts/qcom/qcm6490-fairphone-fp5.dts | 31 ++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/qcm6490-fairphone-fp5.dts b/arch/arm64/boot/dts/qcom/qcm6490-fairphone-fp5.dts
index 9e8f9fb57c4723a24704a8239a86c6081910916b..e115b6a52b299ef663ccfb614785f8f89091f39d 100644
--- a/arch/arm64/boot/dts/qcom/qcm6490-fairphone-fp5.dts
+++ b/arch/arm64/boot/dts/qcom/qcm6490-fairphone-fp5.dts
@@ -14,6 +14,8 @@
 #include <dt-bindings/leds/common.h>
 #include <dt-bindings/pinctrl/qcom,pmic-gpio.h>
 #include <dt-bindings/regulator/qcom,rpmh-regulator.h>
+#include <dt-bindings/sound/qcom,q6asm.h>
+#include <dt-bindings/sound/qcom,q6dsp-lpass-ports.h>
 #include "sc7280.dtsi"
 #include "pm7250b.dtsi"
 #include "pm7325.dtsi"
@@ -1147,6 +1149,35 @@ &sdhc_2 {
 	status = "okay";
 };
 
+&sound {
+	compatible = "fairphone,fp5-sndcard";
+	model = "Fairphone 5";
+
+	mm1-dai-link {
+		link-name = "MultiMedia1";
+
+		cpu {
+			sound-dai = <&q6asmdai MSM_FRONTEND_DAI_MULTIMEDIA1>;
+		};
+	};
+
+	displayport-rx-dai-link {
+		link-name = "DisplayPort Playback";
+
+		codec {
+			sound-dai = <&mdss_dp>;
+		};
+
+		cpu {
+			sound-dai = <&q6afedai DISPLAY_PORT_RX>;
+		};
+
+		platform {
+			sound-dai = <&q6routing>;
+		};
+	};
+};
+
 &spi13 {
 	status = "okay";
 

-- 
2.49.0

Re: [PATCH v2 5/5] arm64: dts: qcom: qcm6490-fairphone-fp5: Add DisplayPort sound support

[Dmitry Baryshkov]

On Fri, Apr 18, 2025 at 03:13:46PM +0200, Luca Weiss wrote:
> Add the required nodes for sound playback via a connected external
> display (DisplayPort over USB-C).
> 
> In user space just the following route needs to be set (e.g. using
> ALSA UCM):
> 
>   amixer -c0 cset name='DISPLAY_PORT_RX Audio Mixer MultiMedia1' 1
> 
> Afterwards one can play audio on the MultiMedia1 sound device, e.g.:
> 
>   aplay -D plughw:0,0 test.wav
> 
> Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
> ---
>  arch/arm64/boot/dts/qcom/qcm6490-fairphone-fp5.dts | 31 ++++++++++++++++++++++
>  1 file changed, 31 insertions(+)
> 

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>

-- 
With best wishes
Dmitry