[alsa-devel] [PATCH] ASoC: intel/skl/hda - export number of digital microphones via control components

[Jaroslav Kysela]

It is required for the auto-detection in the user space (for UCM).

Signed-off-by: Jaroslav Kysela <perex at perex.cz>
Cc: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>
Cc: Mark Brown <broonie at kernel.org>
---
 sound/soc/intel/boards/skl_hda_dsp_generic.c | 8 ++++++++
 sound/soc/sof/intel/hda.c                    | 3 ++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/sound/soc/intel/boards/skl_hda_dsp_generic.c b/sound/soc/intel/boards/skl_hda_dsp_generic.c
index 4e45901e3a2f..11eaee9ae41f 100644
--- a/sound/soc/intel/boards/skl_hda_dsp_generic.c
+++ b/sound/soc/intel/boards/skl_hda_dsp_generic.c
@@ -100,6 +100,8 @@ static struct snd_soc_card hda_soc_card = {
 	.late_probe = skl_hda_card_late_probe,
 };
 
+static char hda_soc_components[30];
+
 #define IDISP_DAI_COUNT		3
 #define HDAC_DAI_COUNT		2
 #define DMIC_DAI_COUNT		2
@@ -183,6 +185,12 @@ static int skl_hda_audio_probe(struct platform_device *pdev)
 	hda_soc_card.dev = &pdev->dev;
 	snd_soc_card_set_drvdata(&hda_soc_card, ctx);
 
+	if (mach->mach_params.dmic_num > 0) {
+		snprintf(hda_soc_components, sizeof(hda_soc_components),
+				"cfg-dmics:%d", mach->mach_params.dmic_num);
+		hda_soc_card.components = hda_soc_components;
+	}
+
 	return devm_snd_soc_register_card(&pdev->dev, &hda_soc_card);
 }
 
diff --git a/sound/soc/sof/intel/hda.c b/sound/soc/sof/intel/hda.c
index 7dc0018dc4c3..92fffca76af5 100644
--- a/sound/soc/sof/intel/hda.c
+++ b/sound/soc/sof/intel/hda.c
@@ -351,7 +351,7 @@ static int hda_init_caps(struct snd_sof_dev *sdev)
 	const char *tplg_filename;
 	const char *idisp_str;
 	const char *dmic_str;
-	int dmic_num;
+	int dmic_num = 0;
 	int codec_num = 0;
 	int i;
 #endif
@@ -465,6 +465,7 @@ static int hda_init_caps(struct snd_sof_dev *sdev)
 		mach_params->codec_mask = bus->codec_mask;
 		mach_params->platform = dev_name(sdev->dev);
 		mach_params->common_hdmi_codec_drv = hda_codec_use_common_hdmi;
+		mach_params->dmic_num = dmic_num;
 	}
 
 	/* create codec instances */
-- 
2.20.1