From: Andrew de Quincey Date: Fri, 8 Jul 2005 00:57:37 +0000 (-0700) Subject: [PATCH] dvb: core: add workaround for tuning problem X-Git-Tag: v2.6.13-rc3~209 X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=4992775c8287145e86b94fe8d19bbb5f20148cc0;p=linux-2.6-omap-h63xx.git [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 Signed-off-by: Johannes Stezenbach Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- 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,