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Commit e9c7d19a authored by Matthias Schwarzott's avatar Matthias Schwarzott Committed by Mauro Carvalho Chehab
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media: si2165: Add DVBv3 wrapper for ber statistics 



Add read_ber function that reads from property cache to support DVBv3.
The implementation is inspired by the cx24120 driver.

Signed-off-by: default avatarMatthias Schwarzott <zzam@gentoo.org>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
parent 2e687a6d

drivers/media/dvb-frontends/si2165.c

+26 −0
Original line number Diff line number Diff line
@@ -57,6 +57,9 @@ struct si2165_state { 
	u32 sys_clk;

	u32 adc_clk;



	/* DVBv3 stats */

	u64 ber_prev;



	bool has_dvbc;

	bool has_dvbt;

	bool firmware_loaded;
@@ -757,6 +760,12 @@ static int si2165_read_status(struct dvb_frontend *fe, enum fe_status *status) 
			c->post_bit_error.stat[0].uvalue = 0;

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



			/*

			 * reset DVBv3 value to deliver a good result

			 * for the first call

			 */

			state->ber_prev = 0;



		} else {

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

			if (ret < 0)
@@ -805,6 +814,22 @@ static int si2165_read_snr(struct dvb_frontend *fe, u16 *snr) 
	return 0;

}



static int si2165_read_ber(struct dvb_frontend *fe, u32 *ber)

{

	struct si2165_state *state = fe->demodulator_priv;

	struct dtv_frontend_properties *c = &fe->dtv_property_cache;



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

		*ber = 0;

		return 0;

	}



	*ber = c->post_bit_error.stat[0].uvalue - state->ber_prev;

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



	return 0;

}



static int si2165_set_oversamp(struct si2165_state *state, u32 dvb_rate)

{

	u64 oversamp;
@@ -1123,6 +1148,7 @@ static const struct dvb_frontend_ops si2165_ops = { 
	.set_frontend      = si2165_set_frontend,

	.read_status       = si2165_read_status,

	.read_snr          = si2165_read_snr,

	.read_ber          = si2165_read_ber,

};



static int si2165_probe(struct i2c_client *client,