evie/android_kernel_oneplus_msm8998
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msm: ultrasound: USF stays awake after each event

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Give upper layers enough time to turn on screen before
falling back into SUSPEND.

Change-Id: I162f25dffdbbeb783d0bca673d6e6db8de412aac
Signed-off-by: Phani Kumar Uppalapati <phaniu@codeaurora.org>
This commit is contained in:
Phani Kumar Uppalapati 2015-12-10 16:51:31 -08:00 • committed by David Keitel
parent 57d7fb0e5f
commit f6c9eb5139
1 changed files with 12 additions and 0 deletions
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12
drivers/misc/qcom/qdsp6v2/ultrasound/usf.c
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@ -22,6 +22,7 @@
#include <linux/uaccess.h> #include <linux/uaccess.h>
#include <linux/time.h> #include <linux/time.h>
#include <linux/kmemleak.h> #include <linux/kmemleak.h>
#include <linux/wakelock.h>
#include <sound/apr_audio.h> #include <sound/apr_audio.h>
#include <linux/qdsp6v2/usf.h> #include <linux/qdsp6v2/usf.h>
#include "q6usm.h" #include "q6usm.h"
@ -67,6 +68,9 @@
#define BITS_IN_BYTE 8 #define BITS_IN_BYTE 8
/* Time to stay awake after tx read event (e.g., proximity) */
#define STAY_AWAKE_AFTER_READ_MSECS 3000
/* The driver states */ /* The driver states */
enum usf_state_type { enum usf_state_type {
USF_IDLE_STATE, USF_IDLE_STATE,
@ -171,6 +175,8 @@ static const int s_button_map[] = {
/* The opened devices container */ /* The opened devices container */
static int s_opened_devs[MAX_DEVS_NUMBER]; static int s_opened_devs[MAX_DEVS_NUMBER];
static struct wakeup_source usf_wakeup_source;
#define USF_NAME_PREFIX "usf_" #define USF_NAME_PREFIX "usf_"
#define USF_NAME_PREFIX_SIZE 4 #define USF_NAME_PREFIX_SIZE 4
@ -435,6 +441,10 @@ static void usf_tx_cb(uint32_t opcode, uint32_t token,
switch (opcode) { switch (opcode) {
case Q6USM_EVENT_READ_DONE: case Q6USM_EVENT_READ_DONE:
pr_debug("%s: acquiring %d msec wake lock\n", __func__,
STAY_AWAKE_AFTER_READ_MSECS);
__pm_wakeup_event(&usf_wakeup_source,
STAY_AWAKE_AFTER_READ_MSECS);
if (token == USM_WRONG_TOKEN) if (token == USM_WRONG_TOKEN)
usf_xx->usf_state = USF_ERROR_STATE; usf_xx->usf_state = USF_ERROR_STATE;
usf_xx->new_region = token; usf_xx->new_region = token;
@ -2285,6 +2295,7 @@ static int usf_open(struct inode *inode, struct file *file)
pr_err("%s:usf allocation failed\n", __func__); pr_err("%s:usf allocation failed\n", __func__);
return -ENOMEM; return -ENOMEM;
} }
wakeup_source_init(&usf_wakeup_source, "usf");
file->private_data = usf; file->private_data = usf;
usf->dev_ind = dev_ind; usf->dev_ind = dev_ind;
@ -2312,6 +2323,7 @@ static int usf_release(struct inode *inode, struct file *file)
s_opened_devs[usf->dev_ind] = 0; s_opened_devs[usf->dev_ind] = 0;
wakeup_source_trash(&usf_wakeup_source);
kfree(usf); kfree(usf);
pr_debug("%s: release exit\n", __func__); pr_debug("%s: release exit\n", __func__);
return 0; return 0;