From 5976d7a95cb0c575c2f7b935918851482a58cf42 Mon Sep 17 00:00:00 2001 From: Oliver Endriss Date: Fri, 27 Oct 2006 23:02:01 +0200 Subject: [saa7146_i2c] short_delay mode fixed for fast machines From: Oliver Endriss 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 --- linux/drivers/media/common/saa7146_i2c.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) (limited to 'linux/drivers') diff --git a/linux/drivers/media/common/saa7146_i2c.c b/linux/drivers/media/common/saa7146_i2c.c index b87dfe8df..8cf024271 100644 --- a/linux/drivers/media/common/saa7146_i2c.c +++ b/linux/drivers/media/common/saa7146_i2c.c @@ -218,11 +218,9 @@ static int saa7146_i2c_writeout(struct saa7146_dev *dev, u32* dword, int short_d } /* wait until we get a transfer done or error */ timeout = jiffies + HZ/100 + 1; /* 10ms */ + /* first read usually delivers bogus results... */ + saa7146_i2c_status(dev); while(1) { - /** - * first read usually delivers bogus results... - */ - saa7146_i2c_status(dev); status = saa7146_i2c_status(dev); if ((status & 0x3) != 1) break; @@ -233,10 +231,10 @@ 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")); return -EIO; } - if ((++trial < 20) && short_delay) + if (++trial < 50 && short_delay) udelay(10); else - msleep(1); + msleep(1); } } -- cgit v1.2.3