ASoC: SOF: Make creation of machine device from SOF core optional

Currently, SOF probes machine drivers by creating a platform device
and passing the machine description as private data.

This is driven by the ACPI restrictions. Ideally, ACPI tables
should contain the description for the machine driver. This is
not possible because ACPI tables are frozen and used on multiple
OS-es (e.g Windows).

In the case of Device Tree we don't have this restriction, so we
choose to probe the machine drivers by creating a DT node as is
the standard ALSA way.

This patch makes the probing of machine drivers from SOF
core optional allowing for Device Tree platforms to decouple
the SOF core from machine driver probing.

Along with this, it also consolidates the machine driver selection
for Intel platforms by defining optional ops for selecting the machine
driver based on the ACPI match for HDA and non-HDA platforms and
setting the mach params.

Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20191204211556.12671-11-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 1 insertions, 28 deletions

diff --git a/sound/soc/sof/sof-acpi-dev.c b/sound/soc/sof/sof-acpi-dev.c
index 22e13ef09811..8174b9a7da95 100644
--- a/sound/soc/sof/sof-acpi-dev.c
+++ b/sound/soc/sof/sof-acpi-dev.c
@@ -145,7 +145,6 @@ static int sof_acpi_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	const struct sof_dev_desc *desc;
-	struct snd_soc_acpi_mach *mach;
 	struct snd_sof_pdata *sof_pdata;
 	const struct snd_sof_dsp_ops *ops;
 	int ret;
@@ -172,35 +171,9 @@ static int sof_acpi_probe(struct platform_device *pdev)
 		return -ENODEV;
 	}
 
-#if IS_ENABLED(CONFIG_SND_SOC_SOF_FORCE_NOCODEC_MODE)
-	/* force nocodec mode */
-	dev_warn(dev, "Force to use nocodec mode\n");
-	mach = devm_kzalloc(dev, sizeof(*mach), GFP_KERNEL);
-	if (!mach)
-		return -ENOMEM;
-	ret = sof_nocodec_setup(dev, sof_pdata, mach, desc, ops);
-	if (ret < 0)
-		return ret;
-#else
-	/* find machine */
-	mach = snd_soc_acpi_find_machine(desc->machines);
-	if (!mach) {
-		dev_warn(dev, "warning: No matching ASoC machine driver found\n");
-	} else {
-		sof_pdata->fw_filename = mach->sof_fw_filename;
-		sof_pdata->tplg_filename = mach->sof_tplg_filename;
-	}
-#endif
-
-	if (mach) {
-		mach->mach_params.platform = dev_name(dev);
-		mach->mach_params.acpi_ipc_irq_index = desc->irqindex_host_ipc;
-	}
-
-	sof_pdata->machine = mach;
 	sof_pdata->desc = desc;
 	sof_pdata->dev = &pdev->dev;
-	sof_pdata->platform = dev_name(dev);
+	sof_pdata->fw_filename = desc->default_fw_filename;
 
 	/* alternate fw and tplg filenames ? */
 	if (fw_path)