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V4L/DVB (7631): au8522: add function au8522_read_mse

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add function au8522_read_mse, which will be used to compute snr

TO DO: mse2snr

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Michael Krufky 2008-04-05 23:13:05 -03:00 committed by Mauro Carvalho Chehab
parent 8973dc4b70
commit fb8152cb01
1 changed files with 18 additions and 1 deletions
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19
drivers/media/dvb/frontends/au8522.c
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@ -321,11 +321,28 @@ static int au8522_read_status(struct dvb_frontend *fe, fe_status_t *status)
return 0;
}
static int au8522_read_mse(struct dvb_frontend *fe)
{
struct au8522_state *state = fe->demodulator_priv;
int mse = 0;
if (state->current_modulation == VSB_8)
mse = au8522_readreg(state, 0x4311);
else
mse = au8522_readreg(state, 0x4522);
dprintk("%s: %d\n", __func__, mse);
return mse;
}
static int au8522_read_snr(struct dvb_frontend *fe, u16 *snr)
{
dprintk("%s()\n", __func__);
*snr = 0;
/* FIXME: This is mse, not snr
* TODO: mse2snr */
*snr = au8522_read_mse(fe);
return 0;
}