From 3a370222b0c514360863ec79c1481dffbbf1ddab Mon Sep 17 00:00:00 2001 From: Malcolm Priestley Date: Sat, 24 May 2014 06:35:57 -0300 Subject: [PATCH] [media] lmedm04: rs2000 check if interrupt urb is over due Change handling of signal_lock on rs2000. Use ibuf[2] to detect lock as there is a longer wait for lock to appear in ibuf[6]. Remove last_key and key_timeout and use jiffies plus 60ms to detect that streaming is still active. If the current jiffies is time_after the interrupt urb overdue and clear signal lock. This results in far faster recovery of lock and streaming. Signed-off-by: Malcolm Priestley Signed-off-by: Mauro Carvalho Chehab --- drivers/media/usb/dvb-usb-v2/lmedm04.c | 25 ++++++++++++++----------- 1 file changed, 14 insertions(+), 11 deletions(-) diff --git a/drivers/media/usb/dvb-usb-v2/lmedm04.c b/drivers/media/usb/dvb-usb-v2/lmedm04.c index f674dc0..7d685bc 100644 --- a/drivers/media/usb/dvb-usb-v2/lmedm04.c +++ b/drivers/media/usb/dvb-usb-v2/lmedm04.c @@ -125,14 +125,13 @@ DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr); #define TUNER_RS2000 0x4 struct lme2510_state { + unsigned long int_urb_due; u8 id; u8 tuner_config; u8 signal_lock; u8 signal_level; u8 signal_sn; u8 time_key; - u8 last_key; - u8 key_timeout; u8 i2c_talk_onoff; u8 i2c_gate; u8 i2c_tuner_gate_w; @@ -323,7 +322,7 @@ static void lme2510_int_response(struct urb *lme_urb) } break; case TUNER_RS2000: - if (ibuf[1] == 0x3 && ibuf[6] == 0xff) + if (ibuf[2] & 0x1) st->signal_lock = 0xff; else st->signal_lock = 0x00; @@ -343,7 +342,12 @@ static void lme2510_int_response(struct urb *lme_urb) break; } } + usb_submit_urb(lme_urb, GFP_ATOMIC); + + /* interrupt urb is due every 48 msecs while streaming + * add 12msecs for system lag */ + st->int_urb_due = jiffies + msecs_to_jiffies(60); } static int lme2510_int_read(struct dvb_usb_adapter *adap) @@ -584,14 +588,13 @@ static int lme2510_msg(struct dvb_usb_device *d, switch (wbuf[3]) { case 0x8c: rbuf[0] = 0x55; - rbuf[1] = 0xff; - if (st->last_key == st->time_key) { - st->key_timeout++; - if (st->key_timeout > 5) - rbuf[1] = 0; - } else - st->key_timeout = 0; - st->last_key = st->time_key; + rbuf[1] = st->signal_lock; + + /* If int_urb_due overdue + * set rbuf[1] to 0 to clear lock */ + if (time_after(jiffies, st->int_urb_due)) + rbuf[1] = 0; + break; default: lme2510_usb_talk(d, wbuf, wlen, rbuf, rlen); -- 2.7.4