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[media] xc5000: delay tuner sleep to 5 seconds

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Some drivers, like au0828 are very sensitive to tuner sleep and may
break if the sleep happens too fast. Also, by keeping the tuner alive
for a while could speedup tuning process during channel scan. So,
change the logic to delay the actual sleep to 5 seconds after its
command.

Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Mauro Carvalho Chehab 2014-05-21 13:57:30 -03:00
parent 5015c27b60
commit f7a27ff1fb
1 changed files with 38 additions and 13 deletions
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49
drivers/media/tuners/xc5000.c
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@ -25,6 +25,7 @@
#include <linux/moduleparam.h>
#include <linux/videodev2.h>
#include <linux/delay.h>
#include <linux/workqueue.h>
#include <linux/dvb/frontend.h>
#include <linux/i2c.h>
@ -65,12 +66,18 @@ struct xc5000_priv {
u16 pll_register_no;
u8 init_status_supported;
u8 fw_checksum_supported;
struct dvb_frontend *fe;
struct delayed_work timer_sleep;
};
/* Misc Defines */
#define MAX_TV_STANDARD 24
#define XC_MAX_I2C_WRITE_LENGTH 64
/* Time to suspend after the .sleep callback is called */
#define XC5000_SLEEP_TIME 5000 /* ms */
/* Signal Types */
#define XC_RF_MODE_AIR 0
#define XC_RF_MODE_CABLE 1
@ -1096,6 +1103,8 @@ static int xc_load_fw_and_init_tuner(struct dvb_frontend *fe, int force)
u16 pll_lock_status;
u16 fw_ck;
cancel_delayed_work(&priv->timer_sleep);
if (force || xc5000_is_firmware_loaded(fe) != 0) {
fw_retry:
@ -1164,9 +1173,28 @@ fw_retry:
return ret;
}
static void xc5000_do_timer_sleep(struct work_struct *timer_sleep)
{
struct xc5000_priv *priv =container_of(timer_sleep, struct xc5000_priv,
timer_sleep.work);
struct dvb_frontend *fe = priv->fe;
int ret;
dprintk(1, "%s()\n", __func__);
/* According to Xceive technical support, the "powerdown" register
was removed in newer versions of the firmware. The "supported"
way to sleep the tuner is to pull the reset pin low for 10ms */
ret = xc5000_tuner_reset(fe);
if (ret != 0)
printk(KERN_ERR
"xc5000: %s() unable to shutdown tuner\n",
__func__);
}
static int xc5000_sleep(struct dvb_frontend *fe)
{
int ret;
struct xc5000_priv *priv = fe->tuner_priv;
dprintk(1, "%s()\n", __func__);
@ -1174,16 +1202,9 @@ static int xc5000_sleep(struct dvb_frontend *fe)
if (no_poweroff)
return 0;
/* According to Xceive technical support, the "powerdown" register
was removed in newer versions of the firmware. The "supported"
way to sleep the tuner is to pull the reset pin low for 10ms */
ret = xc5000_tuner_reset(fe);
if (ret != 0) {
printk(KERN_ERR
"xc5000: %s() unable to shutdown tuner\n",
__func__);
return -EREMOTEIO;
} else
schedule_delayed_work(&priv->timer_sleep,
msecs_to_jiffies(XC5000_SLEEP_TIME));
return 0;
}
@ -1211,8 +1232,10 @@ static int xc5000_release(struct dvb_frontend *fe)
mutex_lock(&xc5000_list_mutex);
if (priv)
if (priv) {
cancel_delayed_work(&priv->timer_sleep);
hybrid_tuner_release_state(priv);
}
mutex_unlock(&xc5000_list_mutex);
@ -1284,6 +1307,8 @@ struct dvb_frontend *xc5000_attach(struct dvb_frontend *fe,
/* new tuner instance */
priv->bandwidth = 6000000;
fe->tuner_priv = priv;
priv->fe = fe;
INIT_DELAYED_WORK(&priv->timer_sleep, xc5000_do_timer_sleep);
break;
default:
/* existing tuner instance */