ASoC: 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 restrictions, 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 arm platforms to decouple the SOF core from machine
driver probing.

Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/sound/soc/sof/ops.h b/sound/soc/sof/ops.h
index 824d36fe59fd..97f4feb73368 100644
--- a/sound/soc/sof/ops.h
+++ b/sound/soc/sof/ops.h
@@ -381,6 +381,32 @@ snd_sof_pcm_platform_pointer(struct snd_sof_dev *sdev,
 	return 0;
 }
 
+/* machine driver */
+static inline int
+snd_sof_machine_register(struct snd_sof_dev *sdev, void *pdata)
+{
+	if (sof_ops(sdev) && sof_ops(sdev)->machine_register)
+		return sof_ops(sdev)->machine_register(sdev, pdata);
+
+	return 0;
+}
+
+static inline void
+snd_sof_machine_unregister(struct snd_sof_dev *sdev, void *pdata)
+{
+	if (sof_ops(sdev) && sof_ops(sdev)->machine_unregister)
+		sof_ops(sdev)->machine_unregister(sdev, pdata);
+}
+
+static inline int
+snd_sof_machine_check(struct snd_sof_dev *sdev)
+{
+	if (sof_ops(sdev) && sof_ops(sdev)->machine_check)
+		return sof_ops(sdev)->machine_check(sdev);
+
+	return 0;
+}
+
 static inline const struct snd_sof_dsp_ops
 *sof_get_ops(const struct sof_dev_desc *d,
 	     const struct sof_ops_table mach_ops[], int asize)