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media: si2165: Add DVBv3 wrapper for ber statistics

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

Signed-off-by: Matthias Schwarzott <zzam@gentoo.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Matthias Schwarzott 2017-11-05 09:25:10 -05:00 committed by Mauro Carvalho Chehab
parent 2e687a6d3d
commit e9c7d19a38
1 changed files with 26 additions and 0 deletions
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26
drivers/media/dvb-frontends/si2165.c
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@ -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,