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asoc: Add support for sysfs based SSR

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Create sysfs node for SSR.

Change-Id: Ia181a51ae969632b739676b4b95e2bf0f50ce432
This commit is contained in:
Revathi Uddaraju
2021-02-11 22:32:16 -08:00
committed by Gerrit - the friendly Code Review server
parent 1207f8266b
commit 9d0e5be6b5
3 changed files with 91 additions and 9 deletions
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73
asoc/msm_common.c
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@@ -1,4 +1,4 @@
/* Copyright (c) 2020, The Linux Foundation. All rights reserved.
/* Copyright (c) 2020-2021, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
@@ -25,6 +25,11 @@
#include "msm_common.h"
struct snd_card_pdata {
struct kobject snd_card_kobj;
int card_status;
}*snd_card_pdata;
#define to_asoc_mach_common_pdata(kobj) \
container_of((kobj), struct msm_common_pdata, aud_dev_kobj)
@@ -32,12 +37,19 @@
#define DEVICE_DISABLE 0
#define ARRAY_SZ 21
#define BUF_SZ 32
#define DIR_SZ 10
static struct attribute device_state_attr = {
.name = "state",
.mode = 0660,
};
static struct attribute card_state_attr = {
.name = "card_state",
.mode = 0660,
};
#define MAX_PORT 20
#define CODEC_CHMAP "Channel Map"
@@ -124,6 +136,65 @@ done:
return ret;
}
int snd_card_notify_user(int card_status)
{
snd_card_pdata->card_status = card_status;
sysfs_notify(&snd_card_pdata->snd_card_kobj, NULL, "card_state");
return 0;
}
static ssize_t snd_card_sysfs_show(struct kobject *kobj,
struct attribute *attr, char *buf)
{
return snprintf(buf, BUF_SZ, "%d", snd_card_pdata->card_status);
}
static ssize_t snd_card_sysfs_store(struct kobject *kobj,
struct attribute *attr, const char *buf, size_t count)
{
sscanf(buf, "%d", &snd_card_pdata->card_status);
sysfs_notify(&snd_card_pdata->snd_card_kobj, NULL, "card_state");
return 0;
}
static const struct sysfs_ops snd_card_sysfs_ops = {
.show = snd_card_sysfs_show,
.store = snd_card_sysfs_store,
};
static struct kobj_type snd_card_ktype = {
.sysfs_ops = &snd_card_sysfs_ops,
};
int snd_card_sysfs_init(void)
{
int ret = 0;
char dir[DIR_SZ] = "snd_card";
snd_card_pdata = kcalloc(1, sizeof(struct snd_card_pdata), GFP_KERNEL);
ret = kobject_init_and_add(&snd_card_pdata->snd_card_kobj, &snd_card_ktype,
kernel_kobj, dir);
if (ret < 0) {
pr_err("%s: Failed to add kobject %s, err = %d\n",
__func__, dir, ret);
goto done;
}
ret = sysfs_create_file(&snd_card_pdata->snd_card_kobj, &card_state_attr);
if (ret < 0) {
pr_err("%s: Failed to add snd_card sysfs entry to %s\n",
__func__, dir);
goto fail_create_file;
}
return ret;
fail_create_file:
kobject_put(&snd_card_pdata->snd_card_kobj);
done:
return ret;
}
static void check_userspace_service_state(struct snd_soc_pcm_runtime *rtd,
struct msm_common_pdata *pdata)
{