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authorAndrew de Quincey <adq_dvb@lidskialf.net>2005-07-07 17:57:37 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-07-07 18:23:53 -0700
commit4992775c8287145e86b94fe8d19bbb5f20148cc0 (patch)
tree6e2c39415532fe7c7c31f1b936130cd66d4ad036 /drivers
parent6757ccc57d2cc4ab4e63d8aee97f2e6b9f998990 (diff)
[PATCH] dvb: core: add workaround for tuning problem
Add workaround for signal lock loss issue, where the frontend loses the signal after some hours without any visible reason. Signed-off-by: Andrew de Quincey <adq_dvb@lidskialf.net> Signed-off-by: Johannes Stezenbach <js@linuxtv.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/media/dvb/dvb-core/dvb_frontend.c28
1 files changed, 25 insertions, 3 deletions
diff --git a/drivers/media/dvb/dvb-core/dvb_frontend.c b/drivers/media/dvb/dvb-core/dvb_frontend.c
index e561ac1e1b1..a8bc84240b5 100644
--- a/drivers/media/dvb/dvb-core/dvb_frontend.c
+++ b/drivers/media/dvb/dvb-core/dvb_frontend.c
@@ -42,6 +42,8 @@
#include "dvb_frontend.h"
#include "dvbdev.h"
+// #define DEBUG_LOCKLOSS 1
+
static int dvb_frontend_debug;
static int dvb_shutdown_timeout = 5;
static int dvb_force_auto_inversion;
@@ -113,6 +115,7 @@ struct dvb_frontend_private {
int exit;
int wakeup;
fe_status_t status;
+ fe_sec_tone_mode_t tone;
};
@@ -434,9 +437,26 @@ static int dvb_frontend_thread(void *data)
/* we're tuned, and the lock is still good... */
if (s & FE_HAS_LOCK)
continue;
- else {
- /* if we _WERE_ tuned, but now don't have a lock,
- * need to zigzag */
+ else { /* if we _WERE_ tuned, but now don't have a lock */
+#ifdef DEBUG_LOCKLOSS
+ /* first of all try setting the tone again if it was on - this
+ * sometimes works around problems with noisy power supplies */
+ if (fe->ops->set_tone && (fepriv->tone == SEC_TONE_ON)) {
+ fe->ops->set_tone(fe, fepriv->tone);
+ mdelay(100);
+ s = 0;
+ fe->ops->read_status(fe, &s);
+ if (s & FE_HAS_LOCK) {
+ printk("DVB%i: Lock was lost, but regained by setting "
+ "the tone. This may indicate your power supply "
+ "is noisy/slightly incompatable with this DVB-S "
+ "adapter\n", fe->dvb->num);
+ fepriv->state = FESTATE_TUNED;
+ continue;
+ }
+ }
+#endif
+ /* some other reason for losing the lock - start zigzagging */
fepriv->state = FESTATE_ZIGZAG_FAST;
fepriv->started_auto_step = fepriv->auto_step;
check_wrapped = 0;
@@ -691,6 +711,7 @@ static int dvb_frontend_ioctl(struct inode *inode, struct file *file,
err = fe->ops->set_tone(fe, (fe_sec_tone_mode_t) parg);
fepriv->state = FESTATE_DISEQC;
fepriv->status = 0;
+ fepriv->tone = (fe_sec_tone_mode_t) parg;
}
break;
@@ -893,6 +914,7 @@ int dvb_register_frontend(struct dvb_adapter* dvb,
init_MUTEX (&fepriv->events.sem);
fe->dvb = dvb;
fepriv->inversion = INVERSION_OFF;
+ fepriv->tone = SEC_TONE_OFF;
printk ("DVB: registering frontend %i (%s)...\n",
fe->dvb->num,