diff options
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/dvb-frontends/af9033.c | 43 |
1 files changed, 25 insertions, 18 deletions
diff --git a/drivers/media/dvb-frontends/af9033.c b/drivers/media/dvb-frontends/af9033.c index a490033e3a7c..e64070156247 100644 --- a/drivers/media/dvb-frontends/af9033.c +++ b/drivers/media/dvb-frontends/af9033.c @@ -854,26 +854,33 @@ static int af9033_read_snr(struct dvb_frontend *fe, u16 *snr) /* use DVBv5 CNR */ if (c->cnr.stat[0].scale == FE_SCALE_DECIBEL) { - *snr = div_s64(c->cnr.stat[0].svalue, 1000); + /* Return 0.1 dB for AF9030 and 0-0xffff for IT9130. */ + if (dev->is_af9035) { + /* 1000x => 10x (0.1 dB) */ + *snr = div_s64(c->cnr.stat[0].svalue, 100); + } else { + /* 1000x => 1x (1 dB) */ + *snr = div_s64(c->cnr.stat[0].svalue, 1000); - /* read current modulation */ - ret = af9033_rd_reg(dev, 0x80f903, &u8tmp); - if (ret) - goto err; + /* read current modulation */ + ret = af9033_rd_reg(dev, 0x80f903, &u8tmp); + if (ret) + goto err; - /* scale value to 0x0000-0xffff */ - switch ((u8tmp >> 0) & 3) { - case 0: - *snr = *snr * 0xFFFF / 23; - break; - case 1: - *snr = *snr * 0xFFFF / 26; - break; - case 2: - *snr = *snr * 0xFFFF / 32; - break; - default: - goto err; + /* scale value to 0x0000-0xffff */ + switch ((u8tmp >> 0) & 3) { + case 0: + *snr = *snr * 0xffff / 23; + break; + case 1: + *snr = *snr * 0xffff / 26; + break; + case 2: + *snr = *snr * 0xffff / 32; + break; + default: + goto err; + } } } else { *snr = 0; |