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[media] af9033: implement DVBv5 statistics for CNR 

Return CNR via DVBv5 statistics API.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Antti Palosaari 2014-09-02 04:24:41 -03:00 committed by Mauro Carvalho Chehab
parent 83f1161911
commit 3e41313aea
1 changed files with 52 additions and 2 deletions
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54
drivers/media/dvb-frontends/af9033.c
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@ -1054,11 +1054,12 @@ static void af9033_stat_work(struct work_struct *work)
{
struct af9033_dev *dev = container_of(work, struct af9033_dev, stat_work.work);
struct dtv_frontend_properties *c = &dev->fe.dtv_property_cache;
int ret, tmp;
u8 u8tmp;
int ret, tmp, i, len;
u8 u8tmp, buf[3];
dev_dbg(&dev->client->dev, "\n");
/* signal strength */
if (dev->fe_status & FE_HAS_SIGNAL) {
if (dev->is_af9035) {
ret = af9033_rd_reg(dev, 0x80004a, &u8tmp);
@ -1078,6 +1079,55 @@ static void af9033_stat_work(struct work_struct *work)
c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
}
/* CNR */
if (dev->fe_status & FE_HAS_VITERBI) {
u32 snr_val;
const struct val_snr *snr_lut;
/* read value */
ret = af9033_rd_regs(dev, 0x80002c, buf, 3);
if (ret)
goto err;
snr_val = (buf[2] << 16) | (buf[1] << 8) | (buf[0] << 0);
/* read current modulation */
ret = af9033_rd_reg(dev, 0x80f903, &u8tmp);
if (ret)
goto err;
switch ((u8tmp >> 0) & 3) {
case 0:
len = ARRAY_SIZE(qpsk_snr_lut);
snr_lut = qpsk_snr_lut;
break;
case 1:
len = ARRAY_SIZE(qam16_snr_lut);
snr_lut = qam16_snr_lut;
break;
case 2:
len = ARRAY_SIZE(qam64_snr_lut);
snr_lut = qam64_snr_lut;
break;
default:
goto err_schedule_delayed_work;
}
for (i = 0; i < len; i++) {
tmp = snr_lut[i].snr * 1000;
if (snr_val < snr_lut[i].val)
break;
}
c->cnr.len = 1;
c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
c->cnr.stat[0].svalue = tmp;
} else {
c->cnr.len = 1;
c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
}
err_schedule_delayed_work:
schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(2000));
return;
err: