ASoC: mt8195: Add support for MT8395 Radxa NIO 12L

Merge series from Julien Massot <julien.massot@collabora.com>:

This patch series adds support for audio playback on the MT8395-based Radxa NIO 12L platform, which uses the integrated MT6359 codec via internal DAI links.

Key additions:
- Support for a new `mediatek,mt8195_mt6359` card configuration that does not rely on external codecs like rt5682.
- Proper memory region declarations and pinctrl setup for the audio front-end (AFE) and audio DSP (ADSP).
- A device tree sound node for headphone audio routing using `DL_SRC_BE` and `AIF1`.
- Enhancements to the DT bindings to document the new compatible string, missing link-name, and additional audio routes (Headphone L/R).

Documentation/devicetree/bindings/sound/mt8195-mt6359.yaml

@@ -21,6 +21,7 @@ properties:
       - mediatek,mt8195_mt6359_rt1019_rt5682
       - mediatek,mt8195_mt6359_rt1011_rt5682
       - mediatek,mt8195_mt6359_max98390_rt5682
+      - mediatek,mt8195_mt6359
 
   model:
     $ref: /schemas/types.yaml#/definitions/string
@@ -44,6 +45,8 @@ properties:
         - Right Spk
 
         # Sources
+        - Headphone L
+        - Headphone R
         - Headset Mic
         - HPOL
         - HPOR
@@ -88,6 +91,7 @@ patternProperties:
       link-name:
         description: Indicates dai-link name and PCM stream name
         enum:
+          - DL_SRC_BE
           - DPTX_BE
           - ETDM1_IN_BE
           - ETDM2_IN_BE

sound/soc/mediatek/mt8195/mt8195-mt6359.c

@@ -92,10 +92,6 @@ static const struct snd_soc_dapm_widget mt8195_mt6359_widgets[] = {
 };
 
 static const struct snd_soc_dapm_route mt8195_mt6359_routes[] = {
-	/* headset */
-	{ "Headphone", NULL, "HPOL" },
-	{ "Headphone", NULL, "HPOR" },
-	{ "IN1P", NULL, "Headset Mic" },
 	/* SOF Uplink */
 	{SOF_DMA_UL4, NULL, "O034"},
 	{SOF_DMA_UL4, NULL, "O035"},
@@ -131,6 +127,13 @@ static const struct snd_kcontrol_new mt8195_speaker_controls[] = {
 	SOC_DAPM_PIN_SWITCH("Ext Spk"),
 };
 
+static const struct snd_soc_dapm_route mt8195_rt5682_routes[] = {
+	/* headset */
+	{ "Headphone", NULL, "HPOL" },
+	{ "Headphone", NULL, "HPOR" },
+	{ "IN1P", NULL, "Headset Mic" },
+};
+
 static const struct snd_soc_dapm_route mt8195_rt1011_routes[] = {
 	{ "Left Spk", NULL, "Left SPO" },
 	{ "Right Spk", NULL, "Right SPO" },
@@ -447,6 +450,7 @@ static int mt8195_rt5682_init(struct snd_soc_pcm_runtime *rtd)
 		snd_soc_rtdcom_lookup(rtd, AFE_PCM_NAME);
 	struct mtk_base_afe *afe = snd_soc_component_get_drvdata(cmpnt_afe);
 	struct mt8195_afe_private *afe_priv = afe->platform_priv;
+	struct snd_soc_card *card = rtd->card;
 	int ret;
 
 	priv->i2so1_mclk = afe_priv->clk[MT8195_CLK_TOP_APLL12_DIV2];
@@ -473,7 +477,12 @@ static int mt8195_rt5682_init(struct snd_soc_pcm_runtime *rtd)
 		return ret;
 	}
 
-	return 0;
+	ret = snd_soc_dapm_add_routes(&card->dapm, mt8195_rt5682_routes,
+				      ARRAY_SIZE(mt8195_rt5682_routes));
+	if (ret)
+		dev_err(rtd->dev, "unable to add dapm routes, ret %d\n", ret);
+
+	return ret;
 };
 
 static int mt8195_rt1011_etdm_hw_params(struct snd_pcm_substream *substream,
@@ -822,12 +831,12 @@ SND_SOC_DAILINK_DEFS(ETDM1_IN_BE,
 
 SND_SOC_DAILINK_DEFS(ETDM2_IN_BE,
 		     DAILINK_COMP_ARRAY(COMP_CPU("ETDM2_IN")),
-		     DAILINK_COMP_ARRAY(COMP_EMPTY()),
+		     DAILINK_COMP_ARRAY(COMP_DUMMY()),
 		     DAILINK_COMP_ARRAY(COMP_EMPTY()));
 
 SND_SOC_DAILINK_DEFS(ETDM1_OUT_BE,
 		     DAILINK_COMP_ARRAY(COMP_CPU("ETDM1_OUT")),
-		     DAILINK_COMP_ARRAY(COMP_EMPTY()),
+		     DAILINK_COMP_ARRAY(COMP_DUMMY()),
 		     DAILINK_COMP_ARRAY(COMP_EMPTY()));
 
 SND_SOC_DAILINK_DEFS(ETDM2_OUT_BE,
@@ -1515,6 +1524,18 @@ static const struct mtk_soundcard_pdata mt8195_mt6359_max98390_rt5682_card = {
 	.soc_probe = mt8195_mt6359_soc_card_probe
 };
 
+static const struct mtk_soundcard_pdata mt8195_mt6359_card = {
+	.card_name = "mt8195_mt6359",
+	.card_data = &(struct mtk_platform_card_data) {
+		.card = &mt8195_mt6359_soc_card,
+		.num_jacks = MT8195_JACK_MAX,
+		.pcm_constraints = mt8195_pcm_constraints,
+		.num_pcm_constraints = ARRAY_SIZE(mt8195_pcm_constraints),
+	},
+	.sof_priv = &mt8195_sof_priv,
+	.soc_probe = mt8195_mt6359_soc_card_probe
+};
+
 static const struct of_device_id mt8195_mt6359_dt_match[] = {
 	{
 		.compatible = "mediatek,mt8195_mt6359_rt1019_rt5682",
@@ -1528,6 +1549,10 @@ static const struct of_device_id mt8195_mt6359_dt_match[] = {
 		.compatible = "mediatek,mt8195_mt6359_max98390_rt5682",
 		.data = &mt8195_mt6359_max98390_rt5682_card,
 	},
+	{
+		.compatible = "mediatek,mt8195_mt6359",
+		.data = &mt8195_mt6359_card,
+	},
 	{},
 };
 MODULE_DEVICE_TABLE(of, mt8195_mt6359_dt_match);