[PATCH v2 1/2] ASoC: SOF: Introduce function sof_of_machine_select

[Chunxu Li]

>From current design in sof_machine_check and snd_sof_new_platform_drv,
the SOF can only support ACPI type machine.

1. In sof_machine_check if there is no ACPI machine exist, the function
will return -ENODEV directly, that's we don't expected if we do not
base on ACPI machine.

2. In snd_sof_new_platform_drv the component driver need a driver name
to do ignore_machine, currently the driver name is obtained from
machine->drv_name, and the type of machine is snd_soc_acpi_mach.

So we add a new function named sof_of_machine_select that we can pass
sof_machine_check and obtain info required by snd_sof_new_platform_drv.

Signed-off-by: Chunxu Li <chunxu.li at mediatek.com>
---
 include/sound/sof.h        |  2 ++
 sound/soc/sof/pcm.c        |  8 +++++++-
 sound/soc/sof/sof-audio.c  | 30 ++++++++++++++++++++++++++++++
 sound/soc/sof/sof-of-dev.h |  7 +++++++
 4 files changed, 46 insertions(+), 1 deletion(-)

diff --git a/include/sound/sof.h b/include/sound/sof.h
index 367dccfea7ad..341fef19e612 100644
--- a/include/sound/sof.h
+++ b/include/sound/sof.h
@@ -89,6 +89,7 @@ struct snd_sof_pdata {
 	/* machine */
 	struct platform_device *pdev_mach;
 	const struct snd_soc_acpi_mach *machine;
+	const struct snd_sof_of_mach *of_machine;
 
 	void *hw_pdata;
 
@@ -102,6 +103,7 @@ struct snd_sof_pdata {
 struct sof_dev_desc {
 	/* list of machines using this configuration */
 	struct snd_soc_acpi_mach *machines;
+	struct snd_sof_of_mach *of_machines;
 
 	/* alternate list of machines using this configuration */
 	struct snd_soc_acpi_mach *alt_machines;
diff --git a/sound/soc/sof/pcm.c b/sound/soc/sof/pcm.c
index 6cb6a432be5e..49f7cb049f62 100644
--- a/sound/soc/sof/pcm.c
+++ b/sound/soc/sof/pcm.c
@@ -13,6 +13,7 @@
 #include <linux/pm_runtime.h>
 #include <sound/pcm_params.h>
 #include <sound/sof.h>
+#include "sof-of-dev.h"
 #include "sof-priv.h"
 #include "sof-audio.h"
 #include "sof-utils.h"
@@ -655,7 +656,12 @@ void snd_sof_new_platform_drv(struct snd_sof_dev *sdev)
 	struct snd_sof_pdata *plat_data = sdev->pdata;
 	const char *drv_name;
 
-	drv_name = plat_data->machine->drv_name;
+	if (plat_data->machine)
+		drv_name = plat_data->machine->drv_name;
+	else if (plat_data->of_machine)
+		drv_name = plat_data->of_machine->drv_name;
+	else
+		drv_name = NULL;
 
 	pd->name = "sof-audio-component";
 	pd->probe = sof_pcm_probe;
diff --git a/sound/soc/sof/sof-audio.c b/sound/soc/sof/sof-audio.c
index 28976098a89e..ea9663d448eb 100644
--- a/sound/soc/sof/sof-audio.c
+++ b/sound/soc/sof/sof-audio.c
@@ -10,6 +10,7 @@
 
 #include <linux/bitfield.h>
 #include "sof-audio.h"
+#include "sof-of-dev.h"
 #include "ops.h"
 
 static void sof_reset_route_setup_status(struct snd_sof_dev *sdev, struct snd_sof_widget *widget)
@@ -784,6 +785,28 @@ int sof_dai_get_bclk(struct snd_soc_pcm_runtime *rtd)
 }
 EXPORT_SYMBOL(sof_dai_get_bclk);
 
+static struct snd_sof_of_mach *sof_of_machine_select(struct snd_sof_dev *sdev)
+{
+	struct snd_sof_pdata *sof_pdata = sdev->pdata;
+	const struct sof_dev_desc *desc = sof_pdata->desc;
+	struct snd_sof_of_mach *mach = desc->of_machines;
+
+	if (!mach)
+		return NULL;
+
+	for (; mach->compatible; mach++) {
+		if (of_machine_is_compatible(mach->compatible)) {
+			sof_pdata->tplg_filename = mach->sof_tplg_filename;
+			if (mach->fw_filename)
+				sof_pdata->fw_filename = mach->fw_filename;
+
+			return mach;
+		}
+	}
+
+	return NULL;
+}
+
 /*
  * SOF Driver enumeration.
  */
@@ -794,6 +817,7 @@ int sof_machine_check(struct snd_sof_dev *sdev)
 	struct snd_soc_acpi_mach *mach;
 
 	if (!IS_ENABLED(CONFIG_SND_SOC_SOF_FORCE_NOCODEC_MODE)) {
+		const struct snd_sof_of_mach *of_mach;
 
 		/* find machine */
 		mach = snd_sof_machine_select(sdev);
@@ -803,6 +827,12 @@ int sof_machine_check(struct snd_sof_dev *sdev)
 			return 0;
 		}
 
+		of_mach = sof_of_machine_select(sdev);
+		if (of_mach) {
+			sof_pdata->of_machine = of_mach;
+			return 0;
+		}
+
 		if (!IS_ENABLED(CONFIG_SND_SOC_SOF_NOCODEC)) {
 			dev_err(sdev->dev, "error: no matching ASoC machine driver found - aborting probe\n");
 			return -ENODEV;
diff --git a/sound/soc/sof/sof-of-dev.h b/sound/soc/sof/sof-of-dev.h
index fd950a222ba4..2948b3a0d9fe 100644
--- a/sound/soc/sof/sof-of-dev.h
+++ b/sound/soc/sof/sof-of-dev.h
@@ -9,6 +9,13 @@
 #ifndef __SOUND_SOC_SOF_OF_H
 #define __SOUND_SOC_SOF_OF_H
 
+struct snd_sof_of_mach {
+	const char *compatible;
+	const char *drv_name;
+	const char *fw_filename;
+	const char *sof_tplg_filename;
+};
+
 extern const struct dev_pm_ops sof_of_pm;
 
 int sof_of_probe(struct platform_device *pdev);
-- 
2.25.1