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Commit d0998ce7 authored by Abylay Ospan's avatar Abylay Ospan Committed by Mauro Carvalho Chehab
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[media] DVB-C read signal strength added for Sony demod 



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

Signed-off-by: default avatarAbylay Ospan <aospan@netup.ru>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
parent 5fda1b65

drivers/media/dvb-frontends/cxd2841er.c

+23 −0
Original line number Diff line number Diff line
@@ -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,