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Commit 25ef9f55 authored by Antti Palosaari's avatar Antti Palosaari Committed by Mauro Carvalho Chehab
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[media] rtl2832: implement DVBv5 signal strength statistics 



Estimate signal strength from IF digital AGC.

Signed-off-by: default avatarAntti Palosaari <crope@iki.fi>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@osg.samsung.com>
parent 084330b7

drivers/media/dvb-frontends/rtl2832.c

+20 −0
Original line number Original line Diff line number Diff line
@@ -474,6 +474,8 @@ static int rtl2832_init(struct dvb_frontend *fe) 
		goto err;

		goto err;

#endif

#endif

	/* init stats here in order signal app which stats are supported */

	/* init stats here in order signal app which stats are supported */

	c->strength.len = 1;

	c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;

	c->cnr.len = 1;

	c->cnr.len = 1;

	c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;

	c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;

	c->post_bit_error.len = 1;

	c->post_bit_error.len = 1;
@@ -823,6 +825,24 @@ static void rtl2832_stat_work(struct work_struct *work) 




	dev_dbg(&client->dev, "\n");

	dev_dbg(&client->dev, "\n");





	/* signal strength */

	if (dev->fe_status & FE_HAS_SIGNAL) {

		/* read digital AGC */

		ret = rtl2832_bulk_read(client, 0x305, &u8tmp, 1);

		if (ret)

			goto err;



		dev_dbg(&client->dev, "digital agc=%02x", u8tmp);



		u8tmp = ~u8tmp;

		u16tmp = u8tmp << 8 | u8tmp << 0;



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

		c->strength.stat[0].uvalue = u16tmp;

	} else {

		c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;

	}



	/* CNR */

	/* CNR */

	if (dev->fe_status & FE_HAS_VITERBI) {

	if (dev->fe_status & FE_HAS_VITERBI) {

		unsigned hierarchy, constellation;

		unsigned hierarchy, constellation;