[PATCH 03/20] ASoC: SOF: Intel: hda: retrieve DMIC number for I2S boards

[Pierre-Louis Bossart]

We currently extract the DMIC number only for HDaudio or SoundWire
platforms. For I2S/TDM platforms, this wasn't necessary until now, but
with devices with ES8336 we need to find a solution to detect dmics
more reliably than with a DMI quirk.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao at linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi at linux.intel.com>
---
 sound/soc/sof/intel/hda.c | 46 +++++++++++++++++++++------------------
 1 file changed, 25 insertions(+), 21 deletions(-)

diff --git a/sound/soc/sof/intel/hda.c b/sound/soc/sof/intel/hda.c
index a99e6608f0b6..711d14a821bb 100644
--- a/sound/soc/sof/intel/hda.c
+++ b/sound/soc/sof/intel/hda.c
@@ -432,11 +432,9 @@ static char *hda_model;
 module_param(hda_model, charp, 0444);
 MODULE_PARM_DESC(hda_model, "Use the given HDA board model.");
 
-#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA) || IS_ENABLED(CONFIG_SND_SOC_SOF_INTEL_SOUNDWIRE)
-static int hda_dmic_num = -1;
-module_param_named(dmic_num, hda_dmic_num, int, 0444);
+static int dmic_num_override = -1;
+module_param_named(dmic_num, dmic_num_override, int, 0444);
 MODULE_PARM_DESC(dmic_num, "SOF HDA DMIC number");
-#endif
 
 #if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA)
 static bool hda_codec_use_common_hdmi = IS_ENABLED(CONFIG_SND_HDA_CODEC_HDMI);
@@ -644,24 +642,35 @@ static int hda_init(struct snd_sof_dev *sdev)
 	return ret;
 }
 
-#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA) || IS_ENABLED(CONFIG_SND_SOC_SOF_INTEL_SOUNDWIRE)
-
-static int check_nhlt_dmic(struct snd_sof_dev *sdev)
+static int check_dmic_num(struct snd_sof_dev *sdev)
 {
 	struct nhlt_acpi_table *nhlt;
-	int dmic_num;
+	int dmic_num = 0;
 
 	nhlt = intel_nhlt_init(sdev->dev);
 	if (nhlt) {
 		dmic_num = intel_nhlt_get_dmic_geo(sdev->dev, nhlt);
 		intel_nhlt_free(nhlt);
-		if (dmic_num >= 1 && dmic_num <= 4)
-			return dmic_num;
 	}
 
-	return 0;
+	/* allow for module parameter override */
+	if (dmic_num_override != -1) {
+		dev_dbg(sdev->dev,
+			"overriding DMICs detected in NHLT tables %d by kernel param %d\n",
+			dmic_num, dmic_num_override);
+		dmic_num = dmic_num_override;
+	}
+
+	if (dmic_num < 0 || dmic_num > 4) {
+		dev_dbg(sdev->dev, "invalid dmic_number %d\n", dmic_num);
+		dmic_num = 0;
+	}
+
+	return dmic_num;
 }
 
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA) || IS_ENABLED(CONFIG_SND_SOC_SOF_INTEL_SOUNDWIRE)
+
 static const char *fixup_tplg_name(struct snd_sof_dev *sdev,
 				   const char *sof_tplg_filename,
 				   const char *idisp_str,
@@ -697,16 +706,8 @@ static int dmic_topology_fixup(struct snd_sof_dev *sdev,
 	const char *dmic_str;
 	int dmic_num;
 
-	/* first check NHLT for DMICs */
-	dmic_num = check_nhlt_dmic(sdev);
-
-	/* allow for module parameter override */
-	if (hda_dmic_num != -1) {
-		dev_dbg(sdev->dev,
-			"overriding DMICs detected in NHLT tables %d by kernel param %d\n",
-			dmic_num, hda_dmic_num);
-		dmic_num = hda_dmic_num;
-	}
+	/* first check for DMICs (using NHLT or module parameter) */
+	dmic_num = check_dmic_num(sdev);
 
 	switch (dmic_num) {
 	case 1:
@@ -1383,6 +1384,9 @@ struct snd_soc_acpi_mach *hda_machine_select(struct snd_sof_dev *sdev)
 		if (!sof_pdata->tplg_filename)
 			sof_pdata->tplg_filename = mach->sof_tplg_filename;
 
+		/* report to machine driver if any DMICs are found */
+		mach->mach_params.dmic_num = check_dmic_num(sdev);
+
 		if (mach->link_mask) {
 			mach->mach_params.links = mach->links;
 			mach->mach_params.link_mask = mach->link_mask;
-- 
2.30.2