redonkable/alistair23-linux
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[media] au0828: tune retry interval for i2c interaction

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Adjust the retry timeout and number of retries to speed up xc5000
firmware download.  With this change it goes from 4.2 seconds to 2.9.
The net time waited is pretty much the same, but we just poll more
often.

Tested at 250 KHz as well as 30 KHz.

Signed-off-by: Devin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Devin Heitmueller 2012-08-06 22:47:06 -03:00 committed by Mauro Carvalho Chehab
parent 8ff63de690
commit baede40c4d
1 changed files with 2 additions and 2 deletions
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4
drivers/media/video/au0828/au0828-i2c.c
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@ -33,8 +33,8 @@ static int i2c_scan;
module_param(i2c_scan, int, 0444);
MODULE_PARM_DESC(i2c_scan, "scan i2c bus at insmod time");
#define I2C_WAIT_DELAY 512
#define I2C_WAIT_RETRY 64
#define I2C_WAIT_DELAY 25
#define I2C_WAIT_RETRY 1000
static inline int i2c_slave_did_write_ack(struct i2c_adapter *i2c_adap)
{