Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 964b3727 authored by Matthias Schwarzott's avatar Matthias Schwarzott Committed by Mauro Carvalho Chehab
Browse files

media: si2165: add DVBv5 BER statistics 



Add support for BER statistics.
Configure a measurement period of 30000 packets.

Signed-off-by: default avatarMatthias Schwarzott <zzam@gentoo.org>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
parent c0675d0b

drivers/media/dvb-frontends/si2165.c

+55 −2
Original line number Diff line number Diff line
@@ -594,8 +594,9 @@ static int si2165_init(struct dvb_frontend *fe) 
	if (ret < 0)

		goto error;



	/* ber_pkt */

	ret = si2165_writereg16(state, REG_BER_PKT, 0x7530);

	/* ber_pkt - default 65535 */

	ret = si2165_writereg16(state, REG_BER_PKT,

				STATISTICS_PERIOD_PKT_COUNT);

	if (ret < 0)

		goto error;
@@ -642,6 +643,10 @@ static int si2165_init(struct dvb_frontend *fe) 
	c = &state->fe.dtv_property_cache;

	c->cnr.len = 1;

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

	c->post_bit_error.len = 1;

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

	c->post_bit_count.len = 1;

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



	return 0;

error:
@@ -738,6 +743,54 @@ static int si2165_read_status(struct dvb_frontend *fe, enum fe_status *status) 
	} else

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



	/* BER */

	if (*status & FE_HAS_VITERBI) {

		if (c->post_bit_error.stat[0].scale == FE_SCALE_NOT_AVAILABLE) {

			/* start new sampling period to get rid of old data*/

			ret = si2165_writereg8(state, REG_BER_RST, 0x01);

			if (ret < 0)

				return ret;



			/* set scale to enter read code on next call */

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

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

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

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



		} else {

			ret = si2165_readreg8(state, REG_BER_AVAIL, &u8tmp);

			if (ret < 0)

				return ret;



			if (u8tmp & 1) {

				u32 biterrcnt;



				ret = si2165_readreg24(state, REG_BER_BIT,

							&biterrcnt);

				if (ret < 0)

					return ret;



				c->post_bit_error.stat[0].uvalue +=

					biterrcnt;

				c->post_bit_count.stat[0].uvalue +=

					STATISTICS_PERIOD_BIT_COUNT;



				/* start new sampling period */

				ret = si2165_writereg8(state,

							REG_BER_RST, 0x01);

				if (ret < 0)

					return ret;



				dev_dbg(&state->client->dev,

					"post_bit_error=%u post_bit_count=%u\n",

					biterrcnt, STATISTICS_PERIOD_BIT_COUNT);

			}

		}

	} else {

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

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

	}



	return 0;

}

drivers/media/dvb-frontends/si2165_priv.h

+11 −0
Original line number Diff line number Diff line
@@ -38,6 +38,9 @@ struct si2165_config { 
	bool inversion;

};



#define STATISTICS_PERIOD_PKT_COUNT	30000u

#define STATISTICS_PERIOD_BIT_COUNT	(STATISTICS_PERIOD_PKT_COUNT * 204 * 8)



#define REG_CHIP_MODE			0x0000

#define REG_CHIP_REVCODE		0x0023

#define REV_CHIP_TYPE			0x0118
@@ -95,8 +98,16 @@ struct si2165_config { 
#define REG_GP_REG0_MSB			0x0387

#define REG_CRC				0x037a

#define REG_CHECK_SIGNAL		0x03a8

#define REG_CBER_RST			0x0424

#define REG_CBER_BIT			0x0428

#define REG_CBER_ERR			0x0430

#define REG_CBER_AVAIL			0x0434

#define REG_PS_LOCK			0x0440

#define REG_UNCOR_CNT			0x0468

#define REG_BER_RST			0x046c

#define REG_BER_PKT			0x0470

#define REG_BER_BIT			0x0478

#define REG_BER_AVAIL			0x047c

#define REG_FEC_LOCK			0x04e0

#define REG_TS_DATA_MODE		0x04e4

#define REG_TS_CLK_MODE			0x04e5