lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

[media] mb86a20s: fix the PER reset logic

Browse Source 
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

40
drivers/media/dvb-frontends/mb86a20s.c
View File

@ -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 @@ static int mb86a20s_get_blk_error(struct dvb_frontend *fe,
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 {