V4L/DVB (4784): [saa7146_i2c] short_delay mode fixed for fast machines
TT DVB-C 2300 runs at 137 kHz I2C speed. short_delay mode did not work reliably on fast machines with that speed. Increased max loop count from 20 to 50. Moved dummy access out of the loop. Signed-off-by: Oliver Endriss <o.endriss@gmx.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
parent
588f98312c
commit
9bb6e2593a
1 changed files with 4 additions and 6 deletions
|
@ -217,11 +217,9 @@ static int saa7146_i2c_writeout(struct saa7146_dev *dev, u32* dword, int short_d
|
||||||
}
|
}
|
||||||
/* wait until we get a transfer done or error */
|
/* wait until we get a transfer done or error */
|
||||||
timeout = jiffies + HZ/100 + 1; /* 10ms */
|
timeout = jiffies + HZ/100 + 1; /* 10ms */
|
||||||
while(1) {
|
/* first read usually delivers bogus results... */
|
||||||
/**
|
|
||||||
* first read usually delivers bogus results...
|
|
||||||
*/
|
|
||||||
saa7146_i2c_status(dev);
|
saa7146_i2c_status(dev);
|
||||||
|
while(1) {
|
||||||
status = saa7146_i2c_status(dev);
|
status = saa7146_i2c_status(dev);
|
||||||
if ((status & 0x3) != 1)
|
if ((status & 0x3) != 1)
|
||||||
break;
|
break;
|
||||||
|
@ -232,7 +230,7 @@ static int saa7146_i2c_writeout(struct saa7146_dev *dev, u32* dword, int short_d
|
||||||
DEB_I2C(("saa7146_i2c_writeout: timed out waiting for end of xfer\n"));
|
DEB_I2C(("saa7146_i2c_writeout: timed out waiting for end of xfer\n"));
|
||||||
return -EIO;
|
return -EIO;
|
||||||
}
|
}
|
||||||
if ((++trial < 20) && short_delay)
|
if (++trial < 50 && short_delay)
|
||||||
udelay(10);
|
udelay(10);
|
||||||
else
|
else
|
||||||
msleep(1);
|
msleep(1);
|
||||||
|
|
Reference in a new issue