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Commit 91171fb6 authored by Antti Palosaari's avatar Antti Palosaari Committed by Mauro Carvalho Chehab
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[media] cxd2820r: dvbv5 statistics for DVB-T2 



Implement dvbv5 statistics for DVB-T2.

Signed-off-by: default avatarAntti Palosaari <crope@iki.fi>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
parent 2832fd31

drivers/media/dvb-frontends/cxd2820r_t2.c

+76 −1
Original line number Diff line number Diff line
@@ -286,8 +286,10 @@ int cxd2820r_get_frontend_t2(struct dvb_frontend *fe, 
int cxd2820r_read_status_t2(struct dvb_frontend *fe, enum fe_status *status)

{

	struct cxd2820r_priv *priv = fe->demodulator_priv;

	struct dtv_frontend_properties *c = &fe->dtv_property_cache;

	int ret;

	u8 buf[1];

	unsigned int utmp;

	u8 buf[4];

	*status = 0;



	ret = cxd2820r_rd_reg(priv, 0x02010 , &buf[0]);
@@ -306,6 +308,79 @@ int cxd2820r_read_status_t2(struct dvb_frontend *fe, enum fe_status *status) 


	dev_dbg(&priv->i2c->dev, "%s: lock=%02x\n", __func__, buf[0]);



	/* Signal strength */

	if (*status & FE_HAS_SIGNAL) {

		unsigned int strength;



		ret = cxd2820r_rd_regs(priv, 0x02026, buf, 2);

		if (ret)

			goto error;



		utmp = buf[0] << 8 | buf[1] << 0;

		utmp = ~utmp & 0x0fff;

		/* Scale value to 0x0000-0xffff */

		strength = utmp << 4 | utmp >> 8;



		c->strength.len = 1;

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

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

	} else {

		c->strength.len = 1;

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

	}



	/* CNR */

	if (*status & FE_HAS_VITERBI) {

		unsigned int cnr;



		ret = cxd2820r_rd_regs(priv, 0x02028, buf, 2);

		if (ret)

			goto error;



		utmp = buf[0] << 8 | buf[1] << 0;

		utmp = utmp & 0x0fff;

		#define CXD2820R_LOG10_8_24 15151336 /* log10(8) << 24 */

		if (utmp)

			cnr = div_u64((u64)(intlog10(utmp)

				      - CXD2820R_LOG10_8_24) * 10000,

				      (1 << 24));

		else

			cnr = 0;



		c->cnr.len = 1;

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

		c->cnr.stat[0].svalue = cnr;

	} else {

		c->cnr.len = 1;

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

	}



	/* BER */

	if (*status & FE_HAS_SYNC) {

		unsigned int post_bit_error;



		ret = cxd2820r_rd_regs(priv, 0x02039, buf, 4);

		if (ret)

			goto error;



		if ((buf[0] >> 4) & 0x01) {

			post_bit_error = buf[0] << 24 | buf[1] << 16 |

					 buf[2] << 8 | buf[3] << 0;

			post_bit_error &= 0x0fffffff;

		} else {

			post_bit_error = 0;

		}



		priv->post_bit_error += post_bit_error;



		c->post_bit_error.len = 1;

		c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;

		c->post_bit_error.stat[0].uvalue = priv->post_bit_error;

	} else {

		c->post_bit_error.len = 1;

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

	}



	return ret;

error:

	dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);