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Commit 988bd281 authored by Mauro Carvalho Chehab's avatar Mauro Carvalho Chehab
Browse files

[media] cxd2841er: provide signal strength for DVB-C 



Currently, there's no stats for DVB-C. Let's at least return
signal strength. The scale is different than on DVB-T, so let's
use a relative scale, for now.

Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
parent 4216be14

drivers/media/dvb-frontends/cxd2841er.c

+6 −1
Original line number Diff line number Diff line
@@ -1750,7 +1750,6 @@ 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(
@@ -1766,6 +1765,12 @@ static void cxd2841er_read_signal_strength(struct dvb_frontend *fe) 
		/* Formula was empirically determinated @ 410 MHz */

		p->strength.stat[0].uvalue = ((s32)strength) * 366 / 100 - 89520;

		break;	/* Code moved out of the function */

	case SYS_DVBC_ANNEX_A:

		strength = cxd2841er_read_agc_gain_t_t2(priv,

							p->delivery_system);

		p->strength.stat[0].scale = FE_SCALE_RELATIVE;

		p->strength.stat[0].uvalue = strength;

		break;

	case SYS_ISDBT:

		strength = 65535 - cxd2841er_read_agc_gain_i(

				priv, p->delivery_system);