From b01052ab0924f07a80538974806f9681d8ea74d1 Mon Sep 17 00:00:00 2001 From: Devin Heitmueller Date: Wed, 19 Apr 2017 20:13:50 -0300 Subject: [PATCH] [media] au8522: fix lock detection to be more reliable Only looking at the lock register causes the status to float between locked and not locked when there is no signal. So improve the logic to also examine the state of the FSC PLL, which results in the lock status being consistently reported. Signed-off-by: Devin Heitmueller Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/media/dvb-frontends/au8522_decoder.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/media/dvb-frontends/au8522_decoder.c b/drivers/media/dvb-frontends/au8522_decoder.c index 5e2164044fc6..343dc92ef54e 100644 --- a/drivers/media/dvb-frontends/au8522_decoder.c +++ b/drivers/media/dvb-frontends/au8522_decoder.c @@ -623,10 +623,12 @@ static int au8522_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt) int val = 0; struct au8522_state *state = to_state(sd); u8 lock_status; + u8 pll_status; /* Interrogate the decoder to see if we are getting a real signal */ lock_status = au8522_readreg(state, 0x00); - if (lock_status == 0xa2) + pll_status = au8522_readreg(state, 0x7e); + if ((lock_status == 0xa2) && (pll_status & 0x10)) vt->signal = 0xffff; else vt->signal = 0x00;