[PATCH 4/5] ASoC: SOF: Intel: hda: list SoundWire peripherals on mismatch

[Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>]

Most of the SoundWire support issues come from bad ACPI information,
or configuration reported by ACPI that are not supported by the SOF
driver/topology. The users see a "No SoundWire machine driver found"
message without any details, and the fallback to HDaudio w/ HDMI is
used.

We can reduce our support load with a clear dev_info() log that will
give us a clear hint on the mismatch and why a machine driver/topology
were not found.

Example log on a MTL device:
[   13.158599] sof-audio-pci-intel-mtl 0000:00:1f.3: No SoundWire machine driver found for the ACPI-reported configuration:
[   13.158603] sof-audio-pci-intel-mtl 0000:00:1f.3: link 0 mfg_id 0x025d part_id 0x0713 version 0x3
[   13.158606] sof-audio-pci-intel-mtl 0000:00:1f.3: link 1 mfg_id 0x025d part_id 0x1316 version 0x3
[   13.158608] sof-audio-pci-intel-mtl 0000:00:1f.3: link 2 mfg_id 0x025d part_id 0x1316 version 0x3

In parallel, we will also provide an update to `alsa-info` to log all
SoundWire peripherals found in ACPI tables.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
Reviewed-by: Bard Liao <yung-chuan.liao@xxxxxxxxxxxxxxx>
---
 sound/soc/sof/intel/hda.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/sound/soc/sof/intel/hda.c b/sound/soc/sof/intel/hda.c
index 8ddc1b0ca3c9..8ac8c10b83bd 100644
--- a/sound/soc/sof/intel/hda.c
+++ b/sound/soc/sof/intel/hda.c
@@ -1645,6 +1645,7 @@ static struct snd_soc_acpi_mach *hda_sdw_machine_select(struct snd_sof_dev *sdev
 {
 	struct snd_sof_pdata *pdata = sdev->pdata;
 	const struct snd_soc_acpi_link_adr *link;
+	struct sdw_extended_slave_id *ids;
 	struct snd_soc_acpi_mach *mach;
 	struct sof_intel_hda_dev *hdev;
 	u32 link_mask;
@@ -1658,6 +1659,16 @@ static struct snd_soc_acpi_mach *hda_sdw_machine_select(struct snd_sof_dev *sdev
 		return NULL;
 	}
 
+	if (!hdev->sdw) {
+		dev_dbg(sdev->dev, "SoundWire context not allocated\n");
+		return NULL;
+	}
+
+	if (!hdev->sdw->num_slaves) {
+		dev_warn(sdev->dev, "No SoundWire peripheral detected in ACPI tables\n");
+		return NULL;
+	}
+
 	/*
 	 * Select SoundWire machine driver if needed using the
 	 * alternate tables. This case deals with SoundWire-only
@@ -1740,7 +1751,11 @@ static struct snd_soc_acpi_mach *hda_sdw_machine_select(struct snd_sof_dev *sdev
 		return mach;
 	}
 
-	dev_info(sdev->dev, "No SoundWire machine driver found\n");
+	dev_info(sdev->dev, "No SoundWire machine driver found for the ACPI-reported configuration:\n");
+	ids = hdev->sdw->ids;
+	for (i = 0; i < hdev->sdw->num_slaves; i++)
+		dev_info(sdev->dev, "link %d mfg_id 0x%04x part_id 0x%04x version %#x\n",
+			 ids[i].link_id, ids[i].id.mfg_id, ids[i].id.part_id, ids[i].id.sdw_version);
 
 	return NULL;
 }
-- 
2.40.1