Commit baede40c authored Aug 06, 2012 by Devin Heitmueller Committed by Mauro Carvalho Chehab Aug 09, 2012

[media] au0828: tune retry interval for i2c interaction



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>

parent 8ff63de6

drivers/media/video/au0828/au0828-i2c.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -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)
		{

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