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[media] rtl2830: wrap DVBv5 signal strength to DVBv3

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Change legacy DVBv3 signal strength to return values calculated by
DVBv5 statistics.

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 2014-12-09 10:20:01 -03:00 committed by Mauro Carvalho Chehab
parent 5bb11ca586
commit d512e28651
1 changed files with 4 additions and 23 deletions
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27
drivers/media/dvb-frontends/rtl2830.c
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@ -623,33 +623,14 @@ static int rtl2830_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
static int rtl2830_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
{
struct i2c_client *client = fe->demodulator_priv;
struct rtl2830_dev *dev = i2c_get_clientdata(client);
int ret;
u8 buf[2];
u16 if_agc_raw, if_agc;
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
if (dev->sleeping)
return 0;
ret = rtl2830_rd_regs(client, 0x359, buf, 2);
if (ret)
goto err;
if_agc_raw = (buf[0] << 8 | buf[1]) & 0x3fff;
if (if_agc_raw & (1 << 9))
if_agc = -(~(if_agc_raw - 1) & 0x1ff);
if (c->strength.stat[0].scale == FE_SCALE_RELATIVE)
*strength = c->strength.stat[0].uvalue;
else
if_agc = if_agc_raw;
*strength = (u8)(55 - if_agc / 182);
*strength |= *strength << 8;
*strength = 0;
return 0;
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static struct dvb_frontend_ops rtl2830_ops = {