ASoC: Intel: add I2S function topology support by bardliao · Pull Request #5657 · thesofproject/linux

bardliao · 2026-01-28T02:56:49Z

Currently, function topology is only used by the SoundWire machines. Extend the support to the I2S machines.

ujfalusi

only checked the first patch

ujfalusi · 2026-01-28T07:34:45Z

sound/hda/core/intel-nhlt.c

 	}

-	dev_err(dev, "%s: No match for SSP%d in NHLT table\n", __func__,
+	dev_dbg(dev, "%s: No match for SSP%d in NHLT table\n", __func__,


I would have this as separate patch?

we are also going to look for DMIC blobs in several nhlt, so change those prints as well?

Not sure about the DMIC blobs. Maybe we can change the DMIC prints when we look for DMIC blobs in several nhlt?

but we do after the second patch...

There could be NHLT blobs w/o DMIC (SSP fragment) and we would print error/warn?

intel_nhlt_get_endpoint_blob() will be called for each NHLT blobs, but it uses dev_dbg already.

you need to call out that in preparation for supporting multiple topology fragments per function which could end up calling this function multiple types with NHLT blobs from different fragments, downgrade the error message to debug level.

Commit message updated. But do you mean to move the commit to before the ASoC: SOF: get nhlt from all topologies commit?

sound/soc/sof/intel/hda-dai.c

sound/soc/sof/ipc4-priv.h

ujfalusi · 2026-01-28T07:45:29Z

sound/soc/sof/ipc4-topology.c

+								   channel_count, sample_rate,
+								   dir, dev_type);
+				if (cfg)
+					break;


goto out; and remove the cfg check after the loop?

sound/soc/sof/ipc4-topology.c

ujfalusi

@bardliao, looks really nice, I have few nitpicks and one bigger question only

ujfalusi · 2026-01-29T06:04:33Z

sound/hda/core/intel-nhlt.c

 	}

-	dev_err(dev, "%s: No match for SSP%d in NHLT table\n", __func__,
+	dev_dbg(dev, "%s: No match for SSP%d in NHLT table\n", __func__,


but we do after the second patch...

There could be NHLT blobs w/o DMIC (SSP fragment) and we would print error/warn?

ujfalusi · 2026-01-29T06:16:23Z

sound/soc/sof/ipc4-topology.c

-						      dai_index);
-		if (dev_type < 0)
+		list_for_each_entry(nhlt, &ipc4_data->nhlt_list, list) {
+			dev_type = intel_nhlt_ssp_device_type(sdev->dev, nhlt->nhlt,


nitpick: nhlt->nhlt, can we do entry->nhlt instead? the outer nhlt is not nhlt as such.

sound/soc/sof/ipc4-topology.c

ujfalusi · 2026-01-29T06:24:06Z

sound/soc/intel/common/sof-function-topology-lib.c

 EXPORT_SYMBOL_GPL(sof_sdw_get_tplg_files);
+
+int sof_i2s_get_tplg_files(struct snd_soc_card *card, const struct snd_soc_acpi_mach *mach,
+			   const char *prefix, const char ***tplg_files, bool best_effort)


do you plan to support the best_effort with SSP machines?

sound/soc/intel/common/sof-function-topology-lib.c

ujfalusi · 2026-01-29T06:30:01Z

sound/soc/intel/common/sof-function-topology-lib.c

+		if (!(*tplg_files)[tplg_num])
+			return -ENOMEM;
+		tplg_num++;
+	}


To my untrained eyes this looks like identical to what sof_sdw_get_tplg_files() would do, just that this lacks the SDW part, no?
Why not rename that function ad use it for all types as universal tool?

Yeah, I thought about it. And yes, they look quite similar, but the existing topologies may use different PCM IDs for different machines. I think it would be better to use separated function to keep the flexibility to have different function topology names for different machines.

sound/soc/sof/ipc4-topology.c

CBala21 · 2026-01-30T12:05:50Z

Tested HDMI in capture and I2S functional. observed the expected behavior.

sound/soc/sof/ipc4-topology.c

ranj063 · 2026-01-30T16:54:36Z

sound/hda/core/intel-nhlt.c

 	}

-	dev_err(dev, "%s: No match for SSP%d in NHLT table\n", __func__,
+	dev_dbg(dev, "%s: No match for SSP%d in NHLT table\n", __func__,


you need to call out that in preparation for supporting multiple topology fragments per function which could end up calling this function multiple types with NHLT blobs from different fragments, downgrade the error message to debug level.

sound/soc/intel/common/sof-function-topology-lib.c

The existing code assumes there is only one NHLT blob either from BIOS or topology. As function topologies are used and each function topology contains a NHLT blob section, we need to search the matching NHLT blob from all the NHLT blobs. The commit suggests adding a list of NHLTs and search the NHLTs from the list. Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>

To support multiple topology fragments per function, this function could be called multiple types with different NHLT blobs from different fragments. Downgrade the error message to debug level since the SSP device type could be found from one of the nhlt. Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>

lgirdwood

LGTM, one nitpick would be it could do with more inline commentary when it comes to how we are searching for files.

The existing code supports get_function_tplg_files callback for SoundWire machine driver only. Some common sections can be used to extend the support to other machines. Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>

…et_tplg_files The Intel SOF SDW machine drive also supports I2S interface. Add related supports for the sof_sdw_get_tplg_files() callback. Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>

… I2S machines Add sof_i2s_get_tplg_files() callback for Intel SOF I2S machines. Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>

Use sof_i2s_get_tplg_files() for SOF es83x6 machines. Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>

ranj063

LGTM thanks @bardliao

bardliao requested review from CBala21, ranj063 and ujfalusi January 28, 2026 02:56

bardliao requested review from dbaluta, kv2019i, lgirdwood and plbossart as code owners January 28, 2026 02:56

ujfalusi reviewed Jan 28, 2026

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bardliao force-pushed the get-i2s-tplg branch 2 times, most recently from a0fd522 to 8d4c0c3 Compare January 29, 2026 03:30

ujfalusi reviewed Jan 29, 2026

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bardliao force-pushed the get-i2s-tplg branch from 8d4c0c3 to 1af3d92 Compare January 29, 2026 14:19

ranj063 reviewed Jan 29, 2026

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sound/soc/sof/ipc4-topology.c Show resolved Hide resolved

ranj063 reviewed Jan 30, 2026

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bardliao added 2 commits February 2, 2026 11:34

bardliao force-pushed the get-i2s-tplg branch from 1af3d92 to 9fdc58f Compare February 2, 2026 05:30

lgirdwood reviewed Feb 3, 2026

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bardliao added 4 commits February 4, 2026 22:02

ASoC: Intel: sof-function-topology-lib: add I2S support for sof_sdw_g…

1dfb801

…et_tplg_files The Intel SOF SDW machine drive also supports I2S interface. Add related supports for the sof_sdw_get_tplg_files() callback. Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>

ASoC: Intel: sof-function-topology-lib: add get_function_topology for…

af19137

… I2S machines Add sof_i2s_get_tplg_files() callback for Intel SOF I2S machines. Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>

ASoC: soc-acpi-intel-ptl-match: I2S machines: use function topology

fd2f6cc

Use sof_i2s_get_tplg_files() for SOF es83x6 machines. Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>

bardliao force-pushed the get-i2s-tplg branch from 9fdc58f to fd2f6cc Compare February 4, 2026 14:05

ranj063 approved these changes Feb 4, 2026

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ujfalusi Jan 29, 2026 •

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