ASoC: SOF: Intel: hda-codec: Delay the codec device registration

The current code flow is:
1. snd_hdac_device_register()
2. set parameters needed by the hdac driver
3. request_codec_module()
   the hdac driver is probed at this point

During boot the codec drivers are not loaded when the hdac device is
registered, it is going to be probed later when loading the codec module,
which point the parameters are set.

On module remove/insert
rmmod snd_sof_pci_intel_tgl
modprobe snd_sof_pci_intel_tgl

The codec module remains loaded and the driver will be probed when the
hdac device is created right away, before the parameters for the driver
has been configured:

1. snd_hdac_device_register()
   the hdac driver is probed at this point
2. set parameters needed by the hdac driver
3. request_codec_module()
   will be a NOP as the module is already loaded

Move the snd_hdac_device_register() later, to be done right before
requesting the codec module to make sure that the parameters are all set
before the device is created:

1. set parameters needed by the hdac driver
2. snd_hdac_device_register()
3. request_codec_module()
   will be a NOP as the module is already loaded

This way at the hdac driver probe all parameters will be set in all cases.

Link: #4731
Fixes: a0575b4 ("ASoC: hdac_hda: Conditionally register dais for HDMI and Analog")
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>

Author: ujfalusi

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

@@ -54,8 +54,16 @@ static int request_codec_module(struct hda_codec *codec)
 
 static int hda_codec_load_module(struct hda_codec *codec)
 {
-	int ret = request_codec_module(codec);
+	int ret;
+
+	ret = snd_hdac_device_register(&codec->core);
+	if (ret) {
+		dev_err(&codec->core.dev, "failed to register hdac device\n");
+		put_device(&codec->core.dev);
+		return ret;
+	}
 
+	ret = request_codec_module(codec);
 	if (ret <= 0) {
 		codec->probe_id = HDA_CODEC_ID_GENERIC;
 		ret = request_codec_module(codec);
@@ -116,7 +124,6 @@ EXPORT_SYMBOL_NS_GPL(hda_codec_jack_check, SND_SOC_SOF_HDA_AUDIO_CODEC);
 static struct hda_codec *hda_codec_device_init(struct hdac_bus *bus, int addr, int type)
 {
 	struct hda_codec *codec;
-	int ret;
 
 	codec = snd_hda_codec_device_init(to_hda_bus(bus), addr, "ehdaudio%dD%d", bus->idx, addr);
 	if (IS_ERR(codec)) {
@@ -126,13 +133,6 @@ static struct hda_codec *hda_codec_device_init(struct hdac_bus *bus, int addr, i
 
 	codec->core.type = type;
 
-	ret = snd_hdac_device_register(&codec->core);
-	if (ret) {
-		dev_err(bus->dev, "failed to register hdac device\n");
-		put_device(&codec->core.dev);
-		return ERR_PTR(ret);
-	}
-
 	return codec;
 }