[PATCH v2 0/5] ASoC: qcom: Shikra machine driver and DT binding support

[PATCH v2 0/5] ASoC: qcom: Shikra machine driver and DT binding support

[Ajay Kumar Nandam]

This series adds Qualcomm Shikra sound-card variant support in DT
bindings and in the sc8280xp machine driver.

Shikra EVK variants use different audio components and processing
architectures:
- CQM/CQS use an I2S-based path with WSA885x amplifiers and
  PM4125 + Rouleur codec components.
- CQS uses modem-DSP based audio processing.
- IQS uses a third-party MAX98091 codec with modem-DSP support.

Changes in v2:
- Split the single machine-driver patch into four separate patches
  as requested by Srinivas and Dmitry:
  - Patch 2/5: extend hw_params for QAIF MI2S/TDM DAI ranges,
    add cpu_dai_fmt, VA_CODEC_DMA_TX_1 and be_ops filter changes
  - Patch 3/5: CQM variant support
  - Patch 4/5: CQS variant support
  - Patch 5/5: IQS variant support
- Carry forward Reviewed-by from Krzysztof on the DT binding patch
- Use correct struct type (qcom_snd_soc_common) for all priv_data

Link: https://lore.kernel.org/all/20260611112946.954172-1-ajay.nandam@oss.qualcomm.com/ [v1]

Dependencies:
- https://lore.kernel.org/all/20260907-b4-qaif-shikra-audio-v5-1-6d8ad9ba5c9f@oss.qualcomm.com/
  Dependency: CPU DAI ID's mentioned in the above patch

Signed-off-by: Ajay Kumar Nandam <ajay.nandam@oss.qualcomm.com>
---
Ajay Kumar Nandam (5):
      ASoC: dt-bindings: qcom,sm8250: add Shikra sound card compatibles
      ASoC: qcom: sc8280xp: Extend hw_params for QAIF backends
      ASoC: qcom: sc8280xp: Add shikra-cqm-evk compatible support
      ASoC: qcom: sc8280xp: Add shikra-cqs-evk compatible support
      ASoC: qcom: sc8280xp: Add shikra-iqs-evk compatible support

 .../devicetree/bindings/sound/qcom,sm8250.yaml     |  3 +
 sound/soc/qcom/sc8280xp.c                          | 82 ++++++++++++++++++++--
 sound/soc/qcom/sdw.c                               |  1 +
 3 files changed, 79 insertions(+), 7 deletions(-)
---
base-commit: c68a982815dcce5464e3bf2a31ac94f5146c04ca
change-id: 20260910-shikra-machine-v2-d6a79dbbd8c2

Best regards,
--  
Ajay Kumar Nandam <ajay.nandam@oss.qualcomm.com>

[PATCH v2 1/5] ASoC: dt-bindings: qcom,sm8250: add Shikra sound card compatibles

[Ajay Kumar Nandam]

Add Shikra sound-card compatible strings to the Qualcomm sound card
binding so DT can describe board-specific audio topologies:

- qcom,shikra-cqm-sndcard
- qcom,shikra-cqs-sndcard
- qcom,shikra-iqs-sndcard

Shikra EVK variants use different codec/interface combinations and DSP
processing paths. Describing these variants explicitly in DT allows the
machine driver to select the correct DAPM routes, controls, and clocking
behavior for each board.

Co-developed-by: Mohammad Rafi Shaik <mohammad.rafi.shaik@oss.qualcomm.com>
Signed-off-by: Mohammad Rafi Shaik <mohammad.rafi.shaik@oss.qualcomm.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Ajay Kumar Nandam <ajay.nandam@oss.qualcomm.com>
---
 Documentation/devicetree/bindings/sound/qcom,sm8250.yaml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/qcom,sm8250.yaml b/Documentation/devicetree/bindings/sound/qcom,sm8250.yaml
index 1536fcd96d68..0e7116d33bd7 100644
--- a/Documentation/devicetree/bindings/sound/qcom,sm8250.yaml
+++ b/Documentation/devicetree/bindings/sound/qcom,sm8250.yaml
@@ -51,6 +51,9 @@ properties:
           - qcom,sc8280xp-sndcard
           - qcom,sdm660-sndcard
           - qcom,sdm845-sndcard
+          - qcom,shikra-cqm-sndcard
+          - qcom,shikra-cqs-sndcard
+          - qcom,shikra-iqs-sndcard
           - qcom,sm8250-sndcard
           - qcom,sm8450-sndcard
           - qcom,x1e80100-sndcard

-- 
2.34.1

[PATCH v2 2/5] ASoC: qcom: sc8280xp: Extend hw_params for QAIF backends

[Ajay Kumar Nandam]

Prepare the sc8280xp machine driver for Shikra EVK variants that use
Audio-IF (QAIF) based backends:

- Add a `cpu_dai_fmt` field in qcom_snd_soc_common so that boards can
  override the default SND_SOC_DAIFMT_BP_FP for MI2S and TDM paths.

- Handle the QAIF MI2S (AIF_MI2S_RX_0 ... AIF_MI2S_TX_12) and QAIF TDM
  (AIF_TDM_RX_0 ... AIF_TDM_TX_12) DAI ID ranges in
  sc8280xp_snd_hw_params() so that format and clock setup applies to
  QAIF backends.

- Add VA_CODEC_DMA_TX_1 to qcom_snd_is_sdw_dai() and
  sc8280xp_be_hw_params_fixup() so that the VA codec DMA path is
  recognised as a SoundWire DAI.

- Widen the sc8280xp_add_be_ops() link filter to also cover links
  with codecs (num_codecs > 0), since QAIF FE+BE links are not
  marked with no_pcm = 1.

No functional change for existing platforms.

Co-developed-by: Mohammad Rafi Shaik <mohammad.rafi.shaik@oss.qualcomm.com>
Signed-off-by: Mohammad Rafi Shaik <mohammad.rafi.shaik@oss.qualcomm.com>
Signed-off-by: Ajay Kumar Nandam <ajay.nandam@oss.qualcomm.com>
---
 sound/soc/qcom/sc8280xp.c | 30 +++++++++++++++++++++++-------
 sound/soc/qcom/sdw.c      |  1 +
 2 files changed, 24 insertions(+), 7 deletions(-)

diff --git a/sound/soc/qcom/sc8280xp.c b/sound/soc/qcom/sc8280xp.c
index 4d48e1012cd4..452296a9e67d 100644
--- a/sound/soc/qcom/sc8280xp.c
+++ b/sound/soc/qcom/sc8280xp.c
@@ -67,6 +67,7 @@ struct qcom_snd_soc_common {
 	const struct snd_kcontrol_new *controls;
 	int num_controls;
 	unsigned int codec_dai_fmt;
+	unsigned int cpu_dai_fmt;
 	bool codec_sysclk_set;
 	bool mi2s_mclk_enable;
 	bool mi2s_bclk_enable;
@@ -126,9 +127,15 @@ static int sc8280xp_tdm_hw_params(struct snd_pcm_substream *substream,
 	if (!cpu_cfg.slots)
 		return 0;
 
-	ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_BP_FP);
-	if (ret && ret != -ENOTSUPP)
-		return ret;
+	if (data->priv->cpu_dai_fmt) {
+		ret = snd_soc_dai_set_fmt(cpu_dai, data->priv->cpu_dai_fmt);
+		if (ret && ret != -ENOTSUPP)
+			return ret;
+	} else {
+		ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_BP_FP);
+		if (ret && ret != -ENOTSUPP)
+			return ret;
+	}
 
 	if (data->priv->codec_dai_fmt) {
 		for_each_rtd_codec_dais(rtd, i, codec_dai) {
@@ -234,6 +241,7 @@ static int sc8280xp_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
 	case TX_CODEC_DMA_TX_1:
 	case TX_CODEC_DMA_TX_2:
 	case TX_CODEC_DMA_TX_3:
+	case VA_CODEC_DMA_TX_1:
 		channels->min = 1;
 		break;
 	default:
@@ -260,9 +268,16 @@ static int sc8280xp_snd_hw_params(struct snd_pcm_substream *substream,
 	case QUINARY_MI2S_RX ... QUINARY_MI2S_TX:
 	case SENARY_MI2S_RX ... SENARY_MI2S_TX:
 	case LPI_MI2S_RX_0 ... LPI_MI2S_TX_4:
-		ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_BP_FP);
-		if (ret && ret != -ENOTSUPP)
-			return ret;
+	case AIF_MI2S_RX_0 ... AIF_MI2S_TX_12:
+		if (data->priv->cpu_dai_fmt) {
+			ret = snd_soc_dai_set_fmt(cpu_dai, data->priv->cpu_dai_fmt);
+			if (ret && ret != -ENOTSUPP)
+				return ret;
+		} else {
+			ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_BP_FP);
+			if (ret && ret != -ENOTSUPP)
+				return ret;
+		}
 
 		if (data->priv->codec_dai_fmt) {
 			ret = snd_soc_dai_set_fmt(codec_dai,
@@ -296,6 +311,7 @@ static int sc8280xp_snd_hw_params(struct snd_pcm_substream *substream,
 		}
 		break;
 	case PRIMARY_TDM_RX_0 ... QUINARY_TDM_TX_7:
+	case AIF_TDM_RX_0 ... AIF_TDM_TX_12:
 		return sc8280xp_tdm_hw_params(substream, params);
 	default:
 		break;
@@ -382,7 +398,7 @@ static void sc8280xp_add_be_ops(struct snd_soc_card *card)
 	int i;
 
 	for_each_card_prelinks(card, i, link) {
-		if (link->no_pcm == 1) {
+		if (link->no_pcm == 1 || link->num_codecs > 0) {
 			link->init = sc8280xp_snd_init;
 			link->be_hw_params_fixup = sc8280xp_be_hw_params_fixup;
 			link->ops = &sc8280xp_be_ops;
diff --git a/sound/soc/qcom/sdw.c b/sound/soc/qcom/sdw.c
index 6576b47a4c8c..e19adb7c750b 100644
--- a/sound/soc/qcom/sdw.c
+++ b/sound/soc/qcom/sdw.c
@@ -30,6 +30,7 @@ static bool qcom_snd_is_sdw_dai(int id)
 	case TX_CODEC_DMA_TX_5:
 	case RX_CODEC_DMA_RX_6:
 	case RX_CODEC_DMA_RX_7:
+	case VA_CODEC_DMA_TX_1:
 	case SLIMBUS_0_RX...SLIMBUS_6_TX:
 		return true;
 	default:

-- 
2.34.1

[PATCH v2 3/5] ASoC: qcom: sc8280xp: Add shikra-cqm-evk compatible support

[Ajay Kumar Nandam]

Add machine driver support for the Qualcomm Shikra CQM EVK board.
The Shikra CQM platform uses an I2S-based audio path with WSA885x
amplifiers and PM4125/Rouleur codec components.

The CQM variant uses DSP_A framing on its QAIF CPU DAI, configured
via the cpu_dai_fmt field introduced in the preceding patch.

Co-developed-by: Mohammad Rafi Shaik <mohammad.rafi.shaik@oss.qualcomm.com>
Signed-off-by: Mohammad Rafi Shaik <mohammad.rafi.shaik@oss.qualcomm.com>
Signed-off-by: Ajay Kumar Nandam <ajay.nandam@oss.qualcomm.com>
---
 sound/soc/qcom/sc8280xp.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/sound/soc/qcom/sc8280xp.c b/sound/soc/qcom/sc8280xp.c
index 452296a9e67d..f9fed5c37c7f 100644
--- a/sound/soc/qcom/sc8280xp.c
+++ b/sound/soc/qcom/sc8280xp.c
@@ -58,6 +58,11 @@ static const struct snd_soc_dapm_widget max98090_dapm_widgets[] = {
 	SND_SOC_DAPM_SPK("Speaker", NULL),
 };
 
+static const struct snd_soc_dapm_widget shikra_cqm_dapm_widgets[] = {
+	SND_SOC_DAPM_HP("Headphone Jack", NULL),
+	SND_SOC_DAPM_MIC("Mic Jack", NULL),
+};
+
 struct qcom_snd_soc_common {
 	const char *driver_name;
 	const struct snd_soc_dapm_widget *dapm_widgets;
@@ -521,6 +526,15 @@ static const struct qcom_snd_soc_common sc8280xp_priv_data = {
 	.wcd_jack = true,
 };
 
+static const struct qcom_snd_soc_common shikra_cqm_priv_data = {
+	.driver_name = "shikra",
+	.dapm_widgets = shikra_cqm_dapm_widgets,
+	.num_dapm_widgets = ARRAY_SIZE(shikra_cqm_dapm_widgets),
+	.cpu_dai_fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_BP_FP,
+	.mi2s_bclk_enable = true,
+	.codec_sysclk_set = true,
+};
+
 static const struct qcom_snd_soc_common sm8450_priv_data = {
 	.driver_name = "sm8450",
 	.dapm_widgets = sc8280xp_dapm_widgets,
@@ -587,6 +601,7 @@ static const struct of_device_id snd_sc8280xp_dt_match[] = {
 	{ .compatible = "qcom,qcs9075-sndcard", .data = &qcs9100_priv_data },
 	{ .compatible = "qcom,qcs9100-sndcard", .data = &qcs9100_priv_data },
 	{ .compatible = "qcom,sc8280xp-sndcard", .data = &sc8280xp_priv_data },
+	{ .compatible = "qcom,shikra-cqm-sndcard", .data = &shikra_cqm_priv_data },
 	{ .compatible = "qcom,sm8450-sndcard", .data = &sm8450_priv_data },
 	{ .compatible = "qcom,sm8475-sndcard", .data = &sm8475_priv_data },
 	{ .compatible = "qcom,sm8550-sndcard", .data = &sm8550_priv_data },

-- 
2.34.1

[PATCH v2 4/5] ASoC: qcom: sc8280xp: Add shikra-cqs-evk compatible support

[Ajay Kumar Nandam]

Add machine driver support for the Qualcomm Shikra CQS EVK board.
The Shikra CQS platform uses an I2S-based audio path with WSA885x
amplifiers and PM4125/Rouleur codec components with modem-DSP based
audio processing.

Co-developed-by: Mohammad Rafi Shaik <mohammad.rafi.shaik@oss.qualcomm.com>
Signed-off-by: Mohammad Rafi Shaik <mohammad.rafi.shaik@oss.qualcomm.com>
Signed-off-by: Ajay Kumar Nandam <ajay.nandam@oss.qualcomm.com>
---
 sound/soc/qcom/sc8280xp.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/sound/soc/qcom/sc8280xp.c b/sound/soc/qcom/sc8280xp.c
index f9fed5c37c7f..5bcdaa192704 100644
--- a/sound/soc/qcom/sc8280xp.c
+++ b/sound/soc/qcom/sc8280xp.c
@@ -535,6 +535,14 @@ static const struct qcom_snd_soc_common shikra_cqm_priv_data = {
 	.codec_sysclk_set = true,
 };
 
+static const struct qcom_snd_soc_common shikra_cqs_priv_data = {
+	.driver_name = "shikra",
+	.dapm_widgets = shikra_cqm_dapm_widgets,
+	.num_dapm_widgets = ARRAY_SIZE(shikra_cqm_dapm_widgets),
+	.mi2s_bclk_enable = true,
+	.codec_sysclk_set = true,
+};
+
 static const struct qcom_snd_soc_common sm8450_priv_data = {
 	.driver_name = "sm8450",
 	.dapm_widgets = sc8280xp_dapm_widgets,
@@ -602,6 +610,7 @@ static const struct of_device_id snd_sc8280xp_dt_match[] = {
 	{ .compatible = "qcom,qcs9100-sndcard", .data = &qcs9100_priv_data },
 	{ .compatible = "qcom,sc8280xp-sndcard", .data = &sc8280xp_priv_data },
 	{ .compatible = "qcom,shikra-cqm-sndcard", .data = &shikra_cqm_priv_data },
+	{ .compatible = "qcom,shikra-cqs-sndcard", .data = &shikra_cqs_priv_data },
 	{ .compatible = "qcom,sm8450-sndcard", .data = &sm8450_priv_data },
 	{ .compatible = "qcom,sm8475-sndcard", .data = &sm8475_priv_data },
 	{ .compatible = "qcom,sm8550-sndcard", .data = &sm8550_priv_data },

-- 
2.34.1

[PATCH v2 5/5] ASoC: qcom: sc8280xp: Add shikra-iqs-evk compatible support

[Ajay Kumar Nandam]

Add machine driver support for the Qualcomm Shikra IQS EVK board.
The Shikra IQS platform uses a third-party MAX98091 codec with
modem-DSP support.

IQS requires board-level DAPM widgets and pin-switch kcontrols
because the MAX98091 codec driver does not expose its own endpoint
topology, unlike the Qualcomm WSA885x/Rouleur codecs used on the
CQM/CQS variants.

Co-developed-by: Mohammad Rafi Shaik <mohammad.rafi.shaik@oss.qualcomm.com>
Signed-off-by: Mohammad Rafi Shaik <mohammad.rafi.shaik@oss.qualcomm.com>
Signed-off-by: Ajay Kumar Nandam <ajay.nandam@oss.qualcomm.com>
---
 sound/soc/qcom/sc8280xp.c | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/sound/soc/qcom/sc8280xp.c b/sound/soc/qcom/sc8280xp.c
index 5bcdaa192704..0551110a685f 100644
--- a/sound/soc/qcom/sc8280xp.c
+++ b/sound/soc/qcom/sc8280xp.c
@@ -63,6 +63,20 @@ static const struct snd_soc_dapm_widget shikra_cqm_dapm_widgets[] = {
 	SND_SOC_DAPM_MIC("Mic Jack", NULL),
 };
 
+static const struct snd_soc_dapm_widget shikra_iqs_dapm_widgets[] = {
+	SND_SOC_DAPM_HP("Headphone", NULL),
+	SND_SOC_DAPM_MIC("Headset Mic", NULL),
+	SND_SOC_DAPM_MIC("Int Mic", NULL),
+	SND_SOC_DAPM_SPK("Speaker", NULL),
+};
+
+static const struct snd_kcontrol_new shikra_iqs_controls[] = {
+	SOC_DAPM_PIN_SWITCH("Headset Mic"),
+	SOC_DAPM_PIN_SWITCH("Headphone"),
+	SOC_DAPM_PIN_SWITCH("Int Mic"),
+	SOC_DAPM_PIN_SWITCH("Speaker"),
+};
+
 struct qcom_snd_soc_common {
 	const char *driver_name;
 	const struct snd_soc_dapm_widget *dapm_widgets;
@@ -543,6 +557,19 @@ static const struct qcom_snd_soc_common shikra_cqs_priv_data = {
 	.codec_sysclk_set = true,
 };
 
+static const struct qcom_snd_soc_common shikra_iqs_priv_data = {
+	.driver_name = "shikra",
+	.dapm_widgets = shikra_iqs_dapm_widgets,
+	.num_dapm_widgets = ARRAY_SIZE(shikra_iqs_dapm_widgets),
+	.controls = shikra_iqs_controls,
+	.num_controls = ARRAY_SIZE(shikra_iqs_controls),
+	.codec_dai_fmt = SND_SOC_DAIFMT_CBP_CFP |
+			 SND_SOC_DAIFMT_NB_NF |
+			 SND_SOC_DAIFMT_I2S,
+	.codec_sysclk_set = true,
+	.mi2s_bclk_enable = true,
+};
+
 static const struct qcom_snd_soc_common sm8450_priv_data = {
 	.driver_name = "sm8450",
 	.dapm_widgets = sc8280xp_dapm_widgets,
@@ -611,6 +638,7 @@ static const struct of_device_id snd_sc8280xp_dt_match[] = {
 	{ .compatible = "qcom,sc8280xp-sndcard", .data = &sc8280xp_priv_data },
 	{ .compatible = "qcom,shikra-cqm-sndcard", .data = &shikra_cqm_priv_data },
 	{ .compatible = "qcom,shikra-cqs-sndcard", .data = &shikra_cqs_priv_data },
+	{ .compatible = "qcom,shikra-iqs-sndcard", .data = &shikra_iqs_priv_data },
 	{ .compatible = "qcom,sm8450-sndcard", .data = &sm8450_priv_data },
 	{ .compatible = "qcom,sm8475-sndcard", .data = &sm8475_priv_data },
 	{ .compatible = "qcom,sm8550-sndcard", .data = &sm8550_priv_data },

-- 
2.34.1

Re: [PATCH v2 5/5] ASoC: qcom: sc8280xp: Add shikra-iqs-evk compatible support

[sashiko-bot]

Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
- [High] Clock provider collision on the I2S bus: both CPU and Codec DAIs are configured as clock providers, resulting in a bus collision on the bitclock and frame clock lines.
--

commit 38d45c7da72e3c695c8ea9cd9e58fbc7be8c7070
Author: Ajay Kumar Nandam <ajay.nandam@oss.qualcomm.com>

ASoC: qcom: sc8280xp: Add shikra-iqs-evk compatible support
    
Add machine driver support for the Qualcomm Shikra IQS EVK board.
The Shikra IQS platform uses a third-party MAX98091 codec with
modem-DSP support.

> diff --git a/sound/soc/qcom/sc8280xp.c b/sound/soc/qcom/sc8280xp.c
> index 5bcdaa1927048..0551110a685f6 100644
> --- a/sound/soc/qcom/sc8280xp.c
> +++ b/sound/soc/qcom/sc8280xp.c

[ ... ]

> @@ -543,6 +557,19 @@ static const struct qcom_snd_soc_common shikra_cqs_priv_data = {
>  	.codec_sysclk_set = true,
>  };
>  
> +static const struct qcom_snd_soc_common shikra_iqs_priv_data = {
> +	.driver_name = "shikra",
> +	.dapm_widgets = shikra_iqs_dapm_widgets,
> +	.num_dapm_widgets = ARRAY_SIZE(shikra_iqs_dapm_widgets),
> +	.controls = shikra_iqs_controls,
> +	.num_controls = ARRAY_SIZE(shikra_iqs_controls),
> +	.codec_dai_fmt = SND_SOC_DAIFMT_CBP_CFP |
> +			 SND_SOC_DAIFMT_NB_NF |
> +			 SND_SOC_DAIFMT_I2S,

[Severity: High]
Does this configuration cause a clock provider collision on the I2S bus?

Here in shikra_iqs_priv_data, codec_dai_fmt configures the codec as the
clock provider (SND_SOC_DAIFMT_CBP_CFP). However, cpu_dai_fmt is left
uninitialized.

During audio playback, when sc8280xp_snd_hw_params() is called, an
uninitialized cpu_dai_fmt triggers a fallback path:

sc8280xp_snd_hw_params() {
        ...
        if (data->priv->cpu_dai_fmt) {
                ...
        } else {
                ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_BP_FP);
                ...
        }
        ...
}

This fallback configures the CPU DAI as a clock provider as well. With
both the codec and the CPU configured to actively drive the bitclock and
frame clock lines, will this lead to a regression with an electrical
collision on the bus?

If the CPU is intended to be the master (as implied by mi2s_bclk_enable
being true), the codec should be configured with SND_SOC_DAIFMT_CBC_CFC.
If the codec is the intended master, cpu_dai_fmt should be explicitly set
to SND_SOC_DAIFMT_BC_FC.

> +	.codec_sysclk_set = true,
> +	.mi2s_bclk_enable = true,
> +};
> +

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260910-shikra-machine-v2-v2-0-9bf6bad589d8@oss.qualcomm.com?part=5

Re: [PATCH v2 2/5] ASoC: qcom: sc8280xp: Extend hw_params for QAIF backends

[sashiko-bot]

Thank you for your contribution! Sashiko AI review found 2 potential issue(s) to consider:
- [Critical] Undeclared identifiers AIF_MI2S_RX_0 ... AIF_MI2S_TX_12 and AIF_TDM_RX_0 ... AIF_TDM_TX_12 cause a build failure.
- [High] Widening the link filter unintentionally assigns backend operations to all DPCM frontend links, risking functional breakage.
--

commit d0e12dda100ab67acf7bccf1f2859efd75647281
Author: Ajay Kumar Nandam <ajay.nandam@oss.qualcomm.com>
Subject: ASoC: qcom: sc8280xp: Extend hw_params for QAIF backends

This commit prepares the sc8280xp machine driver for Shikra EVK variants
that use Audio-IF (QAIF) based backends. It adds support for overriding
default DAI formats and expands hw_params and SoundWire DAI matching
to accommodate QAIF MI2S/TDM and VA codec DMA paths.

> diff --git a/sound/soc/qcom/sc8280xp.c b/sound/soc/qcom/sc8280xp.c
> --- a/sound/soc/qcom/sc8280xp.c
> +++ b/sound/soc/qcom/sc8280xp.c

[ ... ]

> @@ -260,9 +268,16 @@ static int sc8280xp_snd_hw_params(struct snd_pcm_substream *substream,
>  	case QUINARY_MI2S_RX ... QUINARY_MI2S_TX:
>  	case SENARY_MI2S_RX ... SENARY_MI2S_TX:
>  	case LPI_MI2S_RX_0 ... LPI_MI2S_TX_4:
> -		ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_BP_FP);
> -		if (ret && ret != -ENOTSUPP)
> -			return ret;
> +	case AIF_MI2S_RX_0 ... AIF_MI2S_TX_12:

[Severity: Critical]
Are AIF_MI2S_RX_0 and AIF_MI2S_TX_12 declared in this tree?

A search across the kernel source indicates these identifiers might be
missing, perhaps from a pending dependency patch for DT bindings. This
causes an undeclared identifier error in sc8280xp_snd_hw_params(), which
will break the build.

[ ... ]

> @@ -296,6 +311,7 @@ static int sc8280xp_snd_hw_params(struct snd_pcm_substream *substream,
>  		}
>  		break;
>  	case PRIMARY_TDM_RX_0 ... QUINARY_TDM_TX_7:
> +	case AIF_TDM_RX_0 ... AIF_TDM_TX_12:
>  		return sc8280xp_tdm_hw_params(substream, params);
>  	default:
>  		break;

[Severity: Critical]
Similarly, are AIF_TDM_RX_0 and AIF_TDM_TX_12 defined?

This also appears to cause an undeclared identifier compilation error here.

[ ... ]

> @@ -382,7 +398,7 @@ static void sc8280xp_add_be_ops(struct snd_soc_card *card)
>  	int i;
>  
>  	for_each_card_prelinks(card, i, link) {
> -		if (link->no_pcm == 1) {
> +		if (link->no_pcm == 1 || link->num_codecs > 0) {
>  			link->init = sc8280xp_snd_init;
>  			link->be_hw_params_fixup = sc8280xp_be_hw_params_fixup;
>  			link->ops = &sc8280xp_be_ops;

[Severity: High]
Could this widened condition inadvertently match DPCM frontend links?

In qcom_snd_parse_of(), DPCM frontend links are initialized with a dummy
codec, which sets link->num_codecs = 1. This means the filter will evaluate
to true for all DPCM frontends, incorrectly assigning backend operations
like sc8280xp_be_ops to them in sc8280xp_add_be_ops().

If a frontend DAI ID in the DT happens to overlap with a backend DAI ID,
it could trigger backend hw_params logic on the frontend.

The backend logic unconditionally calls snd_soc_dai_set_sysclk() without
checking for -ENOTSUPP errors. Since frontend DAIs do not support sysclk
configuration, this will propagate -ENOTSUPP up the stack, causing frontend
hw_params to fail and breaking the audio path.

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260910-shikra-machine-v2-v2-0-9bf6bad589d8@oss.qualcomm.com?part=2