From bd015f633b05a3d4f88a3d7099746b2819a523f5 Mon Sep 17 00:00:00 2001
From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Date: Tue, 8 Mar 2022 13:25:55 -0600
Subject: [PATCH] ASoC: SOF: Intel: hda: report SSP link mask to machine driver
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Git-commit: bd015f633b05a3d4f88a3d7099746b2819a523f5
Patch-mainline: v5.18-rc1
References: jsc#PED-850

For devices designed for Windows, the SSP information should be listed
in the NHLT, and when present can be used to set quirks automatically
in the machine driver.

The NHLT information exposes BT and analog audio connections
separately, for now we are only interested in the analog audio parts.

The use of dev_info() for the SSP mask is intentional so that we can
immediately flag devices with an ES8336 codec. Since NHLT is not used
for recent Chromebooks these messages should be rare.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://lore.kernel.org/r/20220308192610.392950-6-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 sound/soc/sof/intel/hda.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/sound/soc/sof/intel/hda.c b/sound/soc/sof/intel/hda.c
index 711d14a821bb..eebb3b318d79 100644
--- a/sound/soc/sof/intel/hda.c
+++ b/sound/soc/sof/intel/hda.c
@@ -669,6 +669,25 @@ static int check_dmic_num(struct snd_sof_dev *sdev)
 	return dmic_num;
 }
 
+static int check_nhlt_ssp_mask(struct snd_sof_dev *sdev)
+{
+	struct nhlt_acpi_table *nhlt;
+	int ssp_mask = 0;
+
+	nhlt = intel_nhlt_init(sdev->dev);
+	if (!nhlt)
+		return ssp_mask;
+
+	if (intel_nhlt_has_endpoint_type(nhlt, NHLT_LINK_SSP)) {
+		ssp_mask = intel_nhlt_ssp_endpoint_mask(nhlt, NHLT_DEVICE_I2S);
+		if (ssp_mask)
+			dev_info(sdev->dev, "NHLT_DEVICE_I2S detected, ssp_mask %#x\n", ssp_mask);
+	}
+	intel_nhlt_free(nhlt);
+
+	return ssp_mask;
+}
+
 #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,
@@ -1391,6 +1410,9 @@ struct snd_soc_acpi_mach *hda_machine_select(struct snd_sof_dev *sdev)
 			mach->mach_params.links = mach->links;
 			mach->mach_params.link_mask = mach->link_mask;
 		}
+
+		/* report SSP link mask to machine driver */
+		mach->mach_params.i2s_link_mask = check_nhlt_ssp_mask(sdev);
 	}
 
 	/*
-- 
2.35.3