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Commit 61d7c6aa authored by Antti Palosaari's avatar Antti Palosaari Committed by Mauro Carvalho Chehab
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[media] mn88472: implement signal strength statistics 



Implement DVBv5 signal strength on relative scale.

Signed-off-by: default avatarAntti Palosaari <crope@iki.fi>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
parent 0f314f6c

drivers/media/dvb-frontends/mn88472.c

+26 −2
Original line number Diff line number Diff line
@@ -28,8 +28,9 @@ static int mn88472_read_status(struct dvb_frontend *fe, enum fe_status *status) 
	struct i2c_client *client = fe->demodulator_priv;

	struct mn88472_dev *dev = i2c_get_clientdata(client);

	struct dtv_frontend_properties *c = &fe->dtv_property_cache;

	int ret;

	unsigned int utmp;

	int ret, i;

	unsigned int utmp, utmp1;

	u8 buf[2];



	if (!dev->active) {

		ret = -EAGAIN;
@@ -77,6 +78,24 @@ static int mn88472_read_status(struct dvb_frontend *fe, enum fe_status *status) 
		goto err;

	}



	/* Signal strength */

	if (*status & FE_HAS_SIGNAL) {

		for (i = 0; i < 2; i++) {

			ret = regmap_bulk_read(dev->regmap[2], 0x8e + i,

					       &buf[i], 1);

			if (ret)

				goto err;

		}



		utmp1 = buf[0] << 8 | buf[1] << 0 | buf[0] >> 2;

		dev_dbg(&client->dev, "strength=%u\n", utmp1);



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

		c->strength.stat[0].uvalue = utmp1;

	} else {

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

	}



	return 0;

err:

	dev_dbg(&client->dev, "failed=%d\n", ret);
@@ -462,6 +481,7 @@ static int mn88472_probe(struct i2c_client *client, 
{

	struct mn88472_config *pdata = client->dev.platform_data;

	struct mn88472_dev *dev;

	struct dtv_frontend_properties *c;

	int ret;

	unsigned int utmp;

	static const struct regmap_config regmap_config = {
@@ -547,6 +567,10 @@ static int mn88472_probe(struct i2c_client *client, 
	*pdata->fe = &dev->fe;

	i2c_set_clientdata(client, dev);



	/* Init stats to indicate which stats are supported */

	c = &dev->fe.dtv_property_cache;

	c->strength.len = 1;



	/* Setup callbacks */

	pdata->get_dvb_frontend = mn88472_get_dvb_frontend;