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| author | Mauro Carvalho Chehab <mchehab@infradead.org> | 2008-04-24 11:19:55 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@infradead.org> | 2008-04-24 14:09:50 -0300 |
| commit | b0166ab3a6ae6d7af8d9a21a7836154963c69a11 (patch) | |
| tree | 591f6089f36653b4e209be43615d94a69151fd0d /drivers/media/video/tuner-xc2028.c | |
| parent | c21f1e2e39a1012f57c33d21af5c909cf2ae3b9a (diff) | |
| download | lwn-b0166ab3a6ae6d7af8d9a21a7836154963c69a11.tar.gz lwn-b0166ab3a6ae6d7af8d9a21a7836154963c69a11.zip | |
V4L/DVB (7731): tuner-xc2028: fix signal strength calculus
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers/media/video/tuner-xc2028.c')
| -rw-r--r-- | drivers/media/video/tuner-xc2028.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/media/video/tuner-xc2028.c b/drivers/media/video/tuner-xc2028.c index a32094e545f7..cc3db7d79a0d 100644 --- a/drivers/media/video/tuner-xc2028.c +++ b/drivers/media/video/tuner-xc2028.c @@ -844,21 +844,28 @@ static int xc2028_signal(struct dvb_frontend *fe, u16 *strength) /* Sync Lock Indicator */ rc = xc2028_get_reg(priv, 0x0002, &frq_lock); - if (rc < 0 || frq_lock == 0) + if (rc < 0) goto ret; - /* Frequency is locked. Return signal quality */ + /* Frequency is locked */ + if (frq_lock == 1) + signal = 32768; /* Get SNR of the video signal */ rc = xc2028_get_reg(priv, 0x0040, &signal); if (rc < 0) - signal = -frq_lock; + goto ret; + + /* Use both frq_lock and signal to generate the result */ + signal = signal || ((signal & 0x07) << 12); ret: mutex_unlock(&priv->lock); *strength = signal; + tuner_dbg("signal strength is %d\n", signal); + return rc; } |