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[media] DVB-C read signal strength added for Sony demod

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cxd2841er_read_agc_gain_c added to obtain signal strength.
signal strength now relay on AGC value.

Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Abylay Ospan 2016-06-30 23:09:48 -03:00 committed by Mauro Carvalho Chehab
parent 5fda1b65c2
commit d0998ce76f
1 changed files with 23 additions and 0 deletions
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23
drivers/media/dvb-frontends/cxd2841er.c
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@ -1656,6 +1656,21 @@ static int cxd2841er_read_snr_i(struct cxd2841er_priv *priv, u32 *snr)
return 0;
}
static u16 cxd2841er_read_agc_gain_c(struct cxd2841er_priv *priv,
u8 delsys)
{
u8 data[2];
cxd2841er_write_reg(
priv, I2C_SLVT, 0x00, 0x40);
cxd2841er_read_regs(priv, I2C_SLVT, 0x49, data, 2);
dev_dbg(&priv->i2c->dev,
"%s(): AGC value=%u\n",
__func__, (((u16)data[0] & 0x0F) << 8) |
(u16)(data[1] & 0xFF));
return ((((u16)data[0] & 0x0F) << 8) | (u16)(data[1] & 0xFF)) << 4;
}
static u16 cxd2841er_read_agc_gain_t_t2(struct cxd2841er_priv *priv,
u8 delsys)
{
@ -1735,6 +1750,14 @@ static void cxd2841er_read_signal_strength(struct dvb_frontend *fe)
dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
switch (p->delivery_system) {
case SYS_DVBC_ANNEX_A:
case SYS_DVBC_ANNEX_B:
case SYS_DVBC_ANNEX_C:
strength = 65535 - cxd2841er_read_agc_gain_c(
priv, p->delivery_system);
p->strength.stat[0].scale = FE_SCALE_RELATIVE;
p->strength.stat[0].uvalue = strength;
break;
case SYS_DVBT:
case SYS_DVBT2:
strength = cxd2841er_read_agc_gain_t_t2(priv,