cxd2841er_read_agc_gain_c added to obtain signal strength.
signal strength now relay on AGC value.
Signed-off-by: Abylay Ospan <aospan@xxxxxxxx>
---
drivers/media/dvb-frontends/cxd2841er.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/drivers/media/dvb-frontends/cxd2841er.c b/drivers/media/dvb-frontends/cxd2841er.c
index ef6421c..8705b0a 100644
--- a/drivers/media/dvb-frontends/cxd2841er.c
+++ b/drivers/media/dvb-frontends/cxd2841er.c
@@ -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,
--
2.7.4
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