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[media] mb86a20s: fix the PER reset logic

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The logic that resets the device is wrong. It should be resetting
just the layer that got read. Also, stop is needed before updating
the counters.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Mauro Carvalho Chehab 2013-01-24 11:51:23 -03:00
parent ad0abbf118
commit 313cf4efa4
1 changed files with 35 additions and 5 deletions
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40
drivers/media/dvb-frontends/mb86a20s.c
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@ -934,7 +934,7 @@ static int mb86a20s_get_blk_error(struct dvb_frontend *fe,
u32 *error, u32 *count)
{
struct mb86a20s_state *state = fe->demodulator_priv;
int rc;
int rc, val;
u32 collect_rate;
dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
@ -1007,7 +1007,6 @@ static int mb86a20s_get_blk_error(struct dvb_frontend *fe,
goto reset_measurement;
collect_rate = state->estimated_rate[layer] / 204 / 8;
if (collect_rate < 32)
collect_rate = 32;
if (collect_rate > 65535)
@ -1017,6 +1016,16 @@ static int mb86a20s_get_blk_error(struct dvb_frontend *fe,
dev_dbg(&state->i2c->dev,
"%s: updating PER counter on layer %c to %d.\n",
__func__, 'A' + layer, collect_rate);
/* Stop PER measurement */
rc = mb86a20s_writereg(state, 0x50, 0xb0);
if (rc < 0)
return rc;
rc = mb86a20s_writereg(state, 0x51, 0x00);
if (rc < 0)
return rc;
/* Update this layer's counter */
rc = mb86a20s_writereg(state, 0x50, 0xb2 + layer * 2);
if (rc < 0)
return rc;
@ -1029,6 +1038,25 @@ static int mb86a20s_get_blk_error(struct dvb_frontend *fe,
rc = mb86a20s_writereg(state, 0x51, collect_rate & 0xff);
if (rc < 0)
return rc;
/* start PER measurement */
rc = mb86a20s_writereg(state, 0x50, 0xb0);
if (rc < 0)
return rc;
rc = mb86a20s_writereg(state, 0x51, 0x07);
if (rc < 0)
return rc;
/* Reset all counters to collect new data */
rc = mb86a20s_writereg(state, 0x50, 0xb1);
if (rc < 0)
return rc;
rc = mb86a20s_writereg(state, 0x51, 0x07);
if (rc < 0)
return rc;
rc = mb86a20s_writereg(state, 0x51, 0x00);
return rc;
}
reset_measurement:
@ -1036,14 +1064,16 @@ reset_measurement:
rc = mb86a20s_writereg(state, 0x50, 0xb1);
if (rc < 0)
return rc;
rc = mb86a20s_writereg(state, 0x51, (1 << layer));
rc = mb86a20s_readreg(state, 0x51);
if (rc < 0)
return rc;
rc = mb86a20s_writereg(state, 0x51, 0x00);
val = rc;
rc = mb86a20s_writereg(state, 0x51, val | (1 << layer));
if (rc < 0)
return rc;
rc = mb86a20s_writereg(state, 0x51, val & ~(1 << layer));
return 0;
return rc;
}
struct linear_segments {