ASoC: hdmi-codec: remove multi detection support

DesignWare HDMI driver (= dw-hdmi) is supporting HDMI sound, and its
probe function was calling sound binding function multiple times as
same HDMI device different port.

Because of this behavior, commit 9731f82d ("ASoC: hdmi-codec: enable
multi probe for ...") was added for multi detection case.
But, this DesignWare HDMI detection/bind code was exchanged/adjusted by
commit 69497eb9 ("drm: bridge: dw-hdmi: Implement DRM bridge...").
Now, all DesignWare HDMI sound ports are detected as 1 bindng function.

Because of this, hdmi-codec multi detection support is no longer needed.
Thus, this patch removes
commit 9731f82d ("ASoC: hdmi-codec: enable multi probe for ..."),
and its related
commit 340327a6 ("ASoC: hdmi-codec: Fix hdmi_of_xlate_dai_name...")
commit 8480ac56 ("ASoC: hdmi-codec: remove HDMI device unregister")
commit 0c343a35 ("ASoC: hdmi-codec: fix spelling mistake: ...)
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/hdmi-codec.c

@@ -25,17 +25,6 @@
 
 #include <drm/drm_crtc.h> /* This is only to get MAX_ELD_BYTES */
 
-struct hdmi_device {
-	struct device *dev;
-	struct list_head list;
-	int cnt;
-};
-#define pos_to_hdmi_device(pos)	container_of((pos), struct hdmi_device, list)
-LIST_HEAD(hdmi_device_list);
-static DEFINE_MUTEX(hdmi_mutex);
-
-#define DAI_NAME_SIZE 16
-
 #define HDMI_CODEC_CHMAP_IDX_UNKNOWN  -1
 
 struct hdmi_codec_channel_map_table {
@@ -702,6 +691,7 @@ static int hdmi_codec_pcm_new(struct snd_soc_pcm_runtime *rtd,
 }
 
 static struct snd_soc_dai_driver hdmi_i2s_dai = {
+	.name = "i2s-hifi",
 	.id = DAI_ID_I2S,
 	.playback = {
 		.stream_name = "Playback",
@@ -716,6 +706,7 @@ static struct snd_soc_dai_driver hdmi_i2s_dai = {
 };
 
 static const struct snd_soc_dai_driver hdmi_spdif_dai = {
+	.name = "spdif-hifi",
 	.id = DAI_ID_SPDIF,
 	.playback = {
 		.stream_name = "Playback",
@@ -728,32 +719,6 @@ static const struct snd_soc_dai_driver hdmi_spdif_dai = {
 	.pcm_new = hdmi_codec_pcm_new,
 };
 
-static char hdmi_dai_name[][DAI_NAME_SIZE] = {
-	"hdmi-hifi.0",
-	"hdmi-hifi.1",
-	"hdmi-hifi.2",
-	"hdmi-hifi.3",
-};
-
-static int hdmi_of_xlate_dai_name(struct snd_soc_component *component,
-				  struct of_phandle_args *args,
-				  const char **dai_name)
-{
-	int id;
-
-	if (args->args_count)
-		id = args->args[0];
-	else
-		id = 0;
-
-	if (id < ARRAY_SIZE(hdmi_dai_name)) {
-		*dai_name = hdmi_dai_name[id];
-		return 0;
-	}
-
-	return -EAGAIN;
-}
-
 static struct snd_soc_codec_driver hdmi_codec = {
 	.component_driver = {
 		.controls		= hdmi_controls,
@@ -762,7 +727,6 @@ static struct snd_soc_codec_driver hdmi_codec = {
 		.num_dapm_widgets	= ARRAY_SIZE(hdmi_widgets),
 		.dapm_routes		= hdmi_routes,
 		.num_dapm_routes	= ARRAY_SIZE(hdmi_routes),
-		.of_xlate_dai_name	= hdmi_of_xlate_dai_name,
 	},
 };
 
@@ -771,8 +735,6 @@ static int hdmi_codec_probe(struct platform_device *pdev)
 	struct hdmi_codec_pdata *hcd = pdev->dev.platform_data;
 	struct device *dev = &pdev->dev;
 	struct hdmi_codec_priv *hcp;
-	struct hdmi_device *hd;
-	struct list_head *pos;
 	int dai_count, i = 0;
 	int ret;
 
@@ -794,35 +756,6 @@ static int hdmi_codec_probe(struct platform_device *pdev)
 	if (!hcp)
 		return -ENOMEM;
 
-	hd = NULL;
-	mutex_lock(&hdmi_mutex);
-	list_for_each(pos, &hdmi_device_list) {
-		struct hdmi_device *tmp = pos_to_hdmi_device(pos);
-
-		if (tmp->dev == dev->parent) {
-			hd = tmp;
-			break;
-		}
-	}
-
-	if (!hd) {
-		hd = devm_kzalloc(dev, sizeof(*hd), GFP_KERNEL);
-		if (!hd) {
-			mutex_unlock(&hdmi_mutex);
-			return -ENOMEM;
-		}
-
-		hd->dev = dev->parent;
-
-		list_add_tail(&hd->list, &hdmi_device_list);
-	}
-	mutex_unlock(&hdmi_mutex);
-
-	if (hd->cnt >= ARRAY_SIZE(hdmi_dai_name)) {
-		dev_err(dev, "too many hdmi codec are detected\n");
-		return -EINVAL;
-	}
-
 	hcp->hcd = *hcd;
 	mutex_init(&hcp->current_stream_lock);
 
@@ -835,14 +768,11 @@ static int hdmi_codec_probe(struct platform_device *pdev)
 		hcp->daidrv[i] = hdmi_i2s_dai;
 		hcp->daidrv[i].playback.channels_max =
 			hcd->max_i2s_channels;
-		hcp->daidrv[i].name = hdmi_dai_name[hd->cnt++];
 		i++;
 	}
 
-	if (hcd->spdif) {
+	if (hcd->spdif)
 		hcp->daidrv[i] = hdmi_spdif_dai;
-		hcp->daidrv[i].name = hdmi_dai_name[hd->cnt++];
-	}
 
 	ret = snd_soc_register_codec(dev, &hdmi_codec, hcp->daidrv,
 				     dai_count);
@@ -859,20 +789,8 @@ static int hdmi_codec_probe(struct platform_device *pdev)
 static int hdmi_codec_remove(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
-	struct list_head *pos;
 	struct hdmi_codec_priv *hcp;
 
-	mutex_lock(&hdmi_mutex);
-	list_for_each(pos, &hdmi_device_list) {
-		struct hdmi_device *tmp = pos_to_hdmi_device(pos);
-
-		if (tmp->dev == dev->parent) {
-			list_del(pos);
-			break;
-		}
-	}
-	mutex_unlock(&hdmi_mutex);
-
 	hcp = dev_get_drvdata(dev);
 	kfree(hcp->chmap_info);
 	snd_soc_unregister_codec(dev);