ASoC: msmcobalt: Enable msmcobalt to use audio notifier

Enable msmcobalt to use the audio notifier framework.
Audio notifier framework connects to the best available
framework for remote subsystem notifications such as
subsystem up or down.

Change-Id: Ib88a71e2fdb2b58fd5f87a65cb7d3253884f2d97
CRs-Fixed: 1054000
Signed-off-by: Ben Romberger <bromberg@codeaurora.org>

sound/soc/msm/msmcobalt.c

@@ -33,6 +33,7 @@
 #include <sound/pcm_params.h>
 #include <sound/info.h>
 #include <device_event.h>
+#include <linux/qdsp6v2/audio_notifier.h>
 #include "qdsp6v2/msm-pcm-routing-v2.h"
 #include "../codecs/wcd9335.h"
 #include "../codecs/wcd934x/wcd934x.h"
@@ -334,11 +335,11 @@ static SOC_ENUM_SINGLE_EXT_DECL(quat_mi2s_tx_chs, mi2s_ch_text);
 
 static struct platform_device *spdev;
 
+static bool is_initial_boot;
 static bool codec_reg_done;
 static struct snd_soc_aux_dev *msm_aux_dev;
 static struct snd_soc_codec_conf *msm_codec_conf;
 static struct msm_asoc_wcd93xx_codec msm_codec_fn;
-static void *adsp_state_notifier;
 
 static void *def_tasha_mbhc_cal(void);
 static void *def_tavil_mbhc_cal(void);
@@ -2326,15 +2327,34 @@ err_fail:
 	return ret;
 }
 
-static int  msm_adsp_state_callback(struct notifier_block *nb,
-				    unsigned long value, void *priv)
+static int msmcobalt_notifier_service_cb(struct notifier_block *this,
+					 unsigned long opcode, void *ptr)
 {
-	int ret = NOTIFY_OK;
+	int ret;
 	struct snd_soc_card *card = NULL;
 	const char *be_dl_name = LPASS_BE_SLIMBUS_0_RX;
 	struct snd_soc_pcm_runtime *rtd;
 	struct snd_soc_codec *codec;
 
+	pr_debug("%s: Service opcode 0x%lx\n", __func__, opcode);
+
+	switch (opcode) {
+	case AUDIO_NOTIFIER_SERVICE_DOWN:
+		/*
+		 * Use flag to ignore initial boot notifications
+		 * On initial boot msm_adsp_power_up_config is
+		 * called on init. There is no need to clear
+		 * and set the config again on initial boot.
+		 */
+		if (is_initial_boot)
+			break;
+		msm_afe_clear_config();
+		break;
+	case AUDIO_NOTIFIER_SERVICE_UP:
+		if (is_initial_boot) {
+			is_initial_boot = false;
+			break;
+		}
 		if (!spdev)
 			return -EINVAL;
 
@@ -2345,30 +2365,27 @@ static int  msm_adsp_state_callback(struct notifier_block *nb,
 				"%s: snd_soc_get_pcm_runtime for %s failed!\n",
 				__func__, be_dl_name);
 			ret = -EINVAL;
-		goto err_pcm_runtime;
+			goto done;
 		}
-
 		codec = rtd->codec;
-	if (value == SUBSYS_BEFORE_SHUTDOWN) {
-		pr_debug("%s: ADSP is about to shutdown. Clearing AFE config\n",
-			 __func__);
-		msm_afe_clear_config();
-	} else if (value == SUBSYS_AFTER_POWERUP) {
+
 		ret = msm_adsp_power_up_config(codec);
-		if (ret) {
-			ret = -EINVAL;
-		} else {
-			pr_debug("%s: ADSP is up\n", __func__);
-			ret = NOTIFY_OK;
+		if (ret < 0) {
+			dev_err(card->dev,
+				"%s: msm_adsp_power_up_config failed ret = %d!\n",
+				__func__, ret);
+			goto done;
 		}
+		break;
+	default:
+		break;
+	}
+done:
+	return NOTIFY_OK;
 }
 
-err_pcm_runtime:
-	return ret;
-}
-
-static struct notifier_block adsp_state_notifier_block = {
-	.notifier_call = msm_adsp_state_callback,
+static struct notifier_block service_nb = {
+	.notifier_call  = msmcobalt_notifier_service_cb,
 	.priority = -INT_MAX,
 };
 
@@ -2519,14 +2536,7 @@ static int msm_audrx_init(struct snd_soc_pcm_runtime *rtd)
 			}
 		}
 	}
-	adsp_state_notifier = subsys_notif_register_notifier("adsp",
-						&adsp_state_notifier_block);
-	if (!adsp_state_notifier) {
-		pr_err("%s: Failed to register adsp state notifier\n",
-		       __func__);
-		ret = -EFAULT;
-		goto err_adsp_notify;
-	}
+
 	/*
 	 * Send speaker configuration only for WSA8810.
 	 * Defalut configuration is for WSA8815.
@@ -2575,7 +2585,6 @@ done:
 	return 0;
 
 err_snd_module:
-err_adsp_notify:
 err_afe_cfg:
 	return ret;
 }
@@ -5610,6 +5619,14 @@ static int msm_asoc_machine_probe(struct platform_device *pdev)
 			ret);
 
 	i2s_auxpcm_init(pdev);
+
+	is_initial_boot = true;
+	ret = audio_notifier_register("msmcobalt", AUDIO_NOTIFIER_ADSP_DOMAIN,
+				      &service_nb);
+	if (ret < 0)
+		pr_err("%s: Audio notifier register failed ret = %d\n",
+			__func__, ret);
+
 	return 0;
 err:
 	if (pdata->us_euro_gpio > 0) {