Merge "audio-kernel-ar: Use virt_sndcard_ctl node for sndcard status update"

asoc/gvm_auto_spf_dummy.c

@@ -24,7 +24,8 @@
 #include "msm_dailink.h"
 #include <soc/qcom/boot_stats.h>
 #include "msm_common.h"
-
+#include <linux/cdev.h>
+#include <linux/err.h>
 
 #define DRV_NAME "spf-asoc-snd"
 
@@ -60,6 +61,9 @@
 #define MSM_HIFI_ON 1
 #define DIR_SZ 10
 
+#define AUTO_VIRT_SNDCARD_ONLINE 0
+#define AUTO_VIRT_SNDCARD_OFFLINE 1
+
 struct snd_card_pdata {
 	struct kobject snd_card_kobj;
 	int card_status;
@@ -692,6 +696,70 @@ void msm_common_set_pdata(struct snd_soc_card *card,
 	pdata->common_pdata = common_pdata;
 }
 
+static long virt_sndcard_ioctl(struct file *f, unsigned int cmd, unsigned long arg)
+{
+	int ret = 0;
+
+	switch (cmd) {
+	case AUTO_VIRT_SNDCARD_OFFLINE:
+		snd_card_notify_user(SND_CARD_STATUS_OFFLINE);
+		pr_debug("%s: mark sndcard offline\n", __func__);
+	break;
+	case AUTO_VIRT_SNDCARD_ONLINE:
+		snd_card_notify_user(SND_CARD_STATUS_ONLINE);
+		pr_debug("%s: mark sndcard online\n", __func__);
+	break;
+	default:
+		pr_err("%s: Invalid command = %d\n", __func__, cmd);
+		ret = -EFAULT;
+	break;
+	}
+
+	return ret;
+}
+
+static const struct file_operations virt_sndcard_ctl_fops = {
+	.owner = THIS_MODULE,
+	.unlocked_ioctl = virt_sndcard_ioctl,
+};
+
+static struct cdev virt_sndcard_ctl = {
+	.ops  = &virt_sndcard_ctl_fops,
+};
+
+int msm_audio_ssr_register(struct cdev *virt_sndcard_ctl)
+{
+	static struct class *dev_class;
+	dev_t dev;
+
+	if ((alloc_chrdev_region(&dev, 0, 1, "virt_sndcard_ctl")) < 0) {
+		pr_err("%s: Cannot allocate major number\n", __func__);
+		return -EINVAL;
+	}
+	pr_debug("Major = %d Minor = %d\n", MAJOR(dev), MINOR(dev));
+	cdev_init(virt_sndcard_ctl, &virt_sndcard_ctl_fops);
+	if ((cdev_add(virt_sndcard_ctl, dev, 1)) < 0) {
+		pr_err("%s: Cannot add the device to the system\n", __func__);
+		goto err;
+	}
+	dev_class = class_create(THIS_MODULE, "SSR");
+	if (IS_ERR(dev_class)) {
+		pr_err("%s: Cannot create the struct class\n", __func__);
+		goto err;
+	}
+	if (IS_ERR(device_create(dev_class, NULL, dev, NULL, "virt_sndcard_ctl"))) {
+		pr_err("%s: Cannot create the Device\n", __func__);
+		goto fail;
+	}
+	return 0;
+
+fail:
+	class_destroy(dev_class);
+err:
+	unregister_chrdev_region(dev, 1);
+	return -EINVAL;
+}
+
 static int msm_asoc_machine_probe(struct platform_device *pdev)
 {
 	struct snd_soc_card *card;
@@ -752,6 +820,10 @@ static int msm_asoc_machine_probe(struct platform_device *pdev)
 	pr_debug("%s: DRIVER Audio Ready\n", __func__);
 
 	spdev = pdev;
+	ret = msm_audio_ssr_register(&virt_sndcard_ctl);
+	if (ret)
+		pr_err("%s: Audio virtual sndcard ctrl register fail, ret=%d\n", __func__, ret);
+	dev_info(&pdev->dev, "Audio virtual sndcard ctrl register complete\n");
 
 	ret = snd_card_sysfs_init();
 	if (ret)