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authorMauro Carvalho Chehab <m.chehab@samsung.com>2014-05-21 13:57:30 -0300
committerMauro Carvalho Chehab <m.chehab@samsung.com>2014-05-25 17:50:16 -0300
commitf7a27ff1fb77e114d1059a5eb2ed1cffdc508ce8 (patch)
tree07e3ab839ced4dbee349f50869050c9aa3bd4634 /drivers/media
parent5015c27b60de2b41ddcf8f1b88da2a3025b87cd4 (diff)
[media] xc5000: delay tuner sleep to 5 seconds
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>
Diffstat (limited to 'drivers/media')
-rw-r--r--drivers/media/tuners/xc5000.c43
1 files changed, 34 insertions, 9 deletions
diff --git a/drivers/media/tuners/xc5000.c b/drivers/media/tuners/xc5000.c
index 8df92619883..2b3d514be67 100644
--- a/drivers/media/tuners/xc5000.c
+++ b/drivers/media/tuners/xc5000.c
@@ -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:
@@ -1164,27 +1173,39 @@ fw_retry:
return ret;
}
-static int xc5000_sleep(struct dvb_frontend *fe)
+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__);
- /* Avoid firmware reload on slow devices */
- 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) {
+ if (ret != 0)
printk(KERN_ERR
"xc5000: %s() unable to shutdown tuner\n",
__func__);
- return -EREMOTEIO;
- } else
+}
+
+static int xc5000_sleep(struct dvb_frontend *fe)
+{
+ struct xc5000_priv *priv = fe->tuner_priv;
+
+ dprintk(1, "%s()\n", __func__);
+
+ /* Avoid firmware reload on slow devices */
+ if (no_poweroff)
return 0;
+
+ schedule_delayed_work(&priv->timer_sleep,
+ msecs_to_jiffies(XC5000_SLEEP_TIME));
+
+ return 0;
}
static int xc5000_init(struct dvb_frontend *fe)
@@ -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 */