ASoC: Intel: sof_sdw_rt711*: keep codec device reference until remove

Follow the example of Intel Atom drivers and keep a reference to the
headset codec until the properties are removed.

There is no guarantee that the module for the codec driver is loaded
before the machine driver probe, the use of the deferred probe
mechanism is required.
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20210813151116.23931-6-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/boards/sof_sdw_rt711.c

@@ -21,25 +21,15 @@
  * Note this MUST be called before snd_soc_register_card(), so that the props
  * are in place before the codec component driver's probe function parses them.
  */
-static int rt711_add_codec_device_props(const char *sdw_dev_name)
+static int rt711_add_codec_device_props(struct device *sdw_dev)
 {
 	struct property_entry props[MAX_NO_PROPS] = {};
-	struct device *sdw_dev;
-	int ret;
-
-	sdw_dev = bus_find_device_by_name(&sdw_bus_type, NULL, sdw_dev_name);
-	if (!sdw_dev)
-		return -EPROBE_DEFER;
 
-	if (SOF_RT711_JDSRC(sof_sdw_quirk)) {
-		props[0] = PROPERTY_ENTRY_U32("realtek,jd-src",
-					      SOF_RT711_JDSRC(sof_sdw_quirk));
-	}
-
-	ret = device_add_properties(sdw_dev, props);
-	put_device(sdw_dev);
+	if (!SOF_RT711_JDSRC(sof_sdw_quirk))
+		return 0;
+	props[0] = PROPERTY_ENTRY_U32("realtek,jd-src", SOF_RT711_JDSRC(sof_sdw_quirk));
 
-	return ret;
+	return device_add_properties(sdw_dev, props);
 }
 
 static const struct snd_soc_dapm_widget rt711_widgets[] = {
@@ -137,15 +127,10 @@ static int rt711_rtd_init(struct snd_soc_pcm_runtime *rtd)
 
 int sof_sdw_rt711_exit(struct snd_soc_card *card, struct snd_soc_dai_link *dai_link)
 {
-	struct device *sdw_dev;
-
-	sdw_dev = bus_find_device_by_name(&sdw_bus_type, NULL,
-					  dai_link->codecs[0].name);
-	if (!sdw_dev)
-		return -EINVAL;
+	struct mc_private *ctx = snd_soc_card_get_drvdata(card);
 
-	device_remove_properties(sdw_dev);
-	put_device(sdw_dev);
+	device_remove_properties(ctx->headset_codec_dev);
+	put_device(ctx->headset_codec_dev);
 
 	return 0;
 }
@@ -156,6 +141,8 @@ int sof_sdw_rt711_init(struct snd_soc_card *card,
 		       struct sof_sdw_codec_info *info,
 		       bool playback)
 {
+	struct mc_private *ctx = snd_soc_card_get_drvdata(card);
+	struct device *sdw_dev;
 	int ret;
 
 	/*
@@ -165,9 +152,16 @@ int sof_sdw_rt711_init(struct snd_soc_card *card,
 	if (!playback)
 		return 0;
 
-	ret = rt711_add_codec_device_props(dai_links->codecs[0].name);
-	if (ret < 0)
+	sdw_dev = bus_find_device_by_name(&sdw_bus_type, NULL, dai_links->codecs[0].name);
+	if (!sdw_dev)
+		return -EPROBE_DEFER;
+
+	ret = rt711_add_codec_device_props(sdw_dev);
+	if (ret < 0) {
+		put_device(sdw_dev);
 		return ret;
+	}
+	ctx->headset_codec_dev = sdw_dev;
 
 	dai_links->init = rt711_rtd_init;
 

sound/soc/intel/boards/sof_sdw_rt711_sdca.c

@@ -21,25 +21,16 @@
  * Note this MUST be called before snd_soc_register_card(), so that the props
  * are in place before the codec component driver's probe function parses them.
  */
-static int rt711_sdca_add_codec_device_props(const char *sdw_dev_name)
+static int rt711_sdca_add_codec_device_props(struct device *sdw_dev)
 {
 	struct property_entry props[MAX_NO_PROPS] = {};
-	struct device *sdw_dev;
-	int ret;
-
-	sdw_dev = bus_find_device_by_name(&sdw_bus_type, NULL, sdw_dev_name);
-	if (!sdw_dev)
-		return -EPROBE_DEFER;
 
-	if (SOF_RT711_JDSRC(sof_sdw_quirk)) {
-		props[0] = PROPERTY_ENTRY_U32("realtek,jd-src",
-					      SOF_RT711_JDSRC(sof_sdw_quirk));
-	}
+	if (!SOF_RT711_JDSRC(sof_sdw_quirk))
+		return 0;
 
-	ret = device_add_properties(sdw_dev, props);
-	put_device(sdw_dev);
+	props[0] = PROPERTY_ENTRY_U32("realtek,jd-src", SOF_RT711_JDSRC(sof_sdw_quirk));
 
-	return ret;
+	return device_add_properties(sdw_dev, props);
 }
 
 static const struct snd_soc_dapm_widget rt711_sdca_widgets[] = {
@@ -137,15 +128,10 @@ static int rt711_sdca_rtd_init(struct snd_soc_pcm_runtime *rtd)
 
 int sof_sdw_rt711_sdca_exit(struct snd_soc_card *card, struct snd_soc_dai_link *dai_link)
 {
-	struct device *sdw_dev;
-
-	sdw_dev = bus_find_device_by_name(&sdw_bus_type, NULL,
-					  dai_link->codecs[0].name);
-	if (!sdw_dev)
-		return -EINVAL;
+	struct mc_private *ctx = snd_soc_card_get_drvdata(card);
 
-	device_remove_properties(sdw_dev);
-	put_device(sdw_dev);
+	device_remove_properties(ctx->headset_codec_dev);
+	put_device(ctx->headset_codec_dev);
 
 	return 0;
 }
@@ -156,6 +142,8 @@ int sof_sdw_rt711_sdca_init(struct snd_soc_card *card,
 			    struct sof_sdw_codec_info *info,
 			    bool playback)
 {
+	struct mc_private *ctx = snd_soc_card_get_drvdata(card);
+	struct device *sdw_dev;
 	int ret;
 
 	/*
@@ -165,9 +153,16 @@ int sof_sdw_rt711_sdca_init(struct snd_soc_card *card,
 	if (!playback)
 		return 0;
 
-	ret = rt711_sdca_add_codec_device_props(dai_links->codecs[0].name);
-	if (ret < 0)
+	sdw_dev = bus_find_device_by_name(&sdw_bus_type, NULL, dai_links->codecs[0].name);
+	if (!sdw_dev)
+		return -EPROBE_DEFER;
+
+	ret = rt711_sdca_add_codec_device_props(sdw_dev);
+	if (ret < 0) {
+		put_device(sdw_dev);
 		return ret;
+	}
+	ctx->headset_codec_dev = sdw_dev;
 
 	dai_links->init = rt711_sdca_rtd_init;