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Commit 97f0a38f authored by Weiyin Jiang's avatar Weiyin Jiang Committed by Gerrit - the friendly Code Review server
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ASoC: msm: qdsp6v2: add wakelock hook in misc driver 



add PM_AWAKE and PM_RELAX interfaces as to allow userspace clients to
hold ARM core during timeout count down.

Change-Id: Ia07a4f8675e1c2f25f698119e7f91e752de9dc78
Signed-off-by: default avatarWeiyin Jiang <wjiang@codeaurora.org>
parent 8ca03863

drivers/misc/qcom/qdsp6v2/audio_utils_aio.c

+42 −0
Original line number Diff line number Diff line
@@ -19,6 +19,7 @@ 
#include <linux/uaccess.h>

#include <linux/sched.h>

#include <linux/wait.h>

#include <linux/wakelock.h>

#include <linux/dma-mapping.h>

#include <linux/slab.h>

#include <linux/atomic.h>
@@ -571,6 +572,15 @@ int audio_aio_release(struct inode *inode, struct file *file) 
	pr_debug("%s[%p]\n", __func__, audio);

	mutex_lock(&audio->lock);

	audio->wflush = 1;

	if (audio->wakelock_voted) {

		audio->wakelock_voted = false;

		mutex_lock(&audio->audio_ws_mgr->ws_lock);

		if ((audio->audio_ws_mgr->ref_cnt > 0) &&

				(--audio->audio_ws_mgr->ref_cnt == 0)) {

			pm_relax(audio->miscdevice->this_device);

		}

		mutex_unlock(&audio->audio_ws_mgr->ws_lock);

	}

	if (audio->enabled)

		audio_aio_flush(audio);

	audio->wflush = 0;
@@ -1473,6 +1483,34 @@ static long audio_aio_shared_ioctl(struct file *file, unsigned int cmd, 
		mutex_unlock(&audio->lock);

		break;

	}

	case AUDIO_PM_AWAKE: {

		pr_debug("%s[%p]:AUDIO_PM_AWAKE\n", __func__, audio);

		mutex_lock(&audio->lock);

		if (!audio->wakelock_voted) {

			audio->wakelock_voted = true;

			mutex_lock(&audio->audio_ws_mgr->ws_lock);

			if (audio->audio_ws_mgr->ref_cnt++ == 0)

				pm_stay_awake(audio->miscdevice->this_device);

			mutex_unlock(&audio->audio_ws_mgr->ws_lock);

		}

		mutex_unlock(&audio->lock);

		break;

	}

	case AUDIO_PM_RELAX: {

		pr_debug("%s[%p]:AUDIO_PM_RELAX\n", __func__, audio);

		mutex_lock(&audio->lock);

		if (audio->wakelock_voted) {

			audio->wakelock_voted = false;

			mutex_lock(&audio->audio_ws_mgr->ws_lock);

			if ((audio->audio_ws_mgr->ref_cnt > 0) &&

					(--audio->audio_ws_mgr->ref_cnt == 0)) {

				pm_relax(audio->miscdevice->this_device);

			}

			mutex_unlock(&audio->audio_ws_mgr->ws_lock);

		}

		mutex_unlock(&audio->lock);

		break;

	}

	default:

		pr_err("%s: Unknown ioctl cmd = %d", __func__, cmd);

		rc =  -EINVAL;
@@ -1495,6 +1533,8 @@ static long audio_aio_ioctl(struct file *file, unsigned int cmd, 
	case AUDIO_PAUSE:

	case AUDIO_FLUSH:

	case AUDIO_GET_SESSION_ID:

	case AUDIO_PM_AWAKE:

	case AUDIO_PM_RELAX:

		rc = audio_aio_shared_ioctl(file, cmd, arg);

		break;

	case AUDIO_GET_STATS: {
@@ -1783,6 +1823,8 @@ static long audio_aio_compat_ioctl(struct file *file, unsigned int cmd, 
	case AUDIO_PAUSE:

	case AUDIO_FLUSH:

	case AUDIO_GET_SESSION_ID:

	case AUDIO_PM_AWAKE:

	case AUDIO_PM_RELAX:

		rc = audio_aio_shared_ioctl(file, cmd, arg);

		break;

	case AUDIO_GET_STATS_32: {

drivers/misc/qcom/qdsp6v2/audio_utils_aio.h

+10 −0
Original line number Diff line number Diff line
@@ -104,6 +104,12 @@ union meta_data { 
	struct dec_meta_in meta_in;

} __packed;



/* per device wakeup source manager */

struct ws_mgr {

	struct mutex       ws_lock;

	uint32_t           ref_cnt;

};



#define PCM_BUF_COUNT           (2)

/* Buffer with meta */

#define PCM_BUFSZ_MIN           ((4*1024) + sizeof(struct dec_meta_out))
@@ -165,6 +171,10 @@ struct q6audio_aio { 
	spinlock_t dsp_lock;

	spinlock_t event_queue_lock;



	struct miscdevice *miscdevice;

	uint32_t wakelock_voted;

	struct ws_mgr *audio_ws_mgr;



#ifdef CONFIG_DEBUG_FS

	struct dentry *dentry;

#endif

drivers/misc/qcom/qdsp6v2/audio_wma.c

+15 −1
Original line number Diff line number Diff line
@@ -18,8 +18,12 @@ 
#include <linux/types.h>

#include <linux/msm_audio_wma.h>

#include <linux/compat.h>

#include <linux/wakelock.h>

#include "audio_utils_aio.h"



struct miscdevice audio_wma_misc;

struct ws_mgr audio_wma_ws_mgr;



#ifdef CONFIG_DEBUG_FS

static const struct file_operations audio_wma_debug_fops = {

	.read = audio_aio_debug_read,
@@ -244,6 +248,9 @@ static int audio_open(struct inode *inode, struct file *file) 
	}



	audio->pcm_cfg.buffer_size = PCM_BUFSZ_MIN;

	audio->miscdevice = &audio_wma_misc;

	audio->wakelock_voted = false;

	audio->audio_ws_mgr = &audio_wma_ws_mgr;



	audio->ac = q6asm_audio_client_alloc((app_cb) q6_audio_cb,

					     (void *)audio);
@@ -326,7 +333,14 @@ struct miscdevice audio_wma_misc = { 


static int __init audio_wma_init(void)

{

	return misc_register(&audio_wma_misc);

	int ret = misc_register(&audio_wma_misc);



	if (ret == 0)

		device_init_wakeup(audio_wma_misc.this_device, true);

	audio_wma_ws_mgr.ref_cnt = 0;

	mutex_init(&audio_wma_ws_mgr.ws_lock);



	return ret;

}



device_initcall(audio_wma_init);

drivers/misc/qcom/qdsp6v2/audio_wmapro.c

+15 −1
Original line number Diff line number Diff line
@@ -18,8 +18,12 @@ 
#include <linux/types.h>

#include <linux/msm_audio_wmapro.h>

#include <linux/compat.h>

#include <linux/wakelock.h>

#include "audio_utils_aio.h"



struct miscdevice audio_wmapro_misc;

struct ws_mgr     audio_wmapro_ws_mgr;



#ifdef CONFIG_DEBUG_FS

static const struct file_operations audio_wmapro_debug_fops = {

	.read = audio_aio_debug_read,
@@ -317,6 +321,9 @@ static int audio_open(struct inode *inode, struct file *file) 




	audio->pcm_cfg.buffer_size = PCM_BUFSZ_MIN;

	audio->miscdevice = &audio_wmapro_misc;

	audio->wakelock_voted = false;

	audio->audio_ws_mgr = &audio_wmapro_ws_mgr;



	audio->ac = q6asm_audio_client_alloc((app_cb) q6_audio_cb,

					     (void *)audio);
@@ -399,7 +406,14 @@ struct miscdevice audio_wmapro_misc = { 


static int __init audio_wmapro_init(void)

{

	return misc_register(&audio_wmapro_misc);

	int ret = misc_register(&audio_wmapro_misc);



	if (ret == 0)

		device_init_wakeup(audio_wmapro_misc.this_device, true);

	audio_wmapro_ws_mgr.ref_cnt = 0;

	mutex_init(&audio_wmapro_ws_mgr.ws_lock);



	return ret;

}



device_initcall(audio_wmapro_init);

include/uapi/linux/msm_audio.h

+4 −1
Original line number Diff line number Diff line
@@ -114,7 +114,10 @@ 
#define AUDIO_EFFECTS_READ _IOWR(AUDIO_IOCTL_MAGIC, 103, void *)

#define AUDIO_EFFECTS_SET_PP_PARAMS _IOW(AUDIO_IOCTL_MAGIC, 104, void *)



#define	AUDIO_MAX_COMMON_IOCTL_NUM	105

#define AUDIO_PM_AWAKE      _IOW(AUDIO_IOCTL_MAGIC, 105, unsigned)

#define AUDIO_PM_RELAX      _IOW(AUDIO_IOCTL_MAGIC, 106, unsigned)



#define	AUDIO_MAX_COMMON_IOCTL_NUM	107





#define HANDSET_MIC			0x01