Good morning. After moving to an AMD64 system and kernel 2.6.14rc1,
plus last Saturday's CVS dvb drivers, I found that, while talking with
my hauppauge DVB-S budget card, delays for frontend IOCTL's
(FE_READ_STATUS, FE_READ_SNR and FE_READ_SIGNAL_STRENGTH) were
unexpectedly increased. Each ioctl took 200-400 milliseconds to
return. After a long and painful search, I found out that the delay
happened in I2C comms. I noticed that, in av7110.c, a flag was set,
called SAA7146_I2C_SHORT_DELAY, in the saa7146_extension
structure. So, I applied the following simple patch:
--- budget.c~ 2005-09-04 14:58:21.000000000 +0200
+++ budget.c 2005-09-17 23:28:14.000000000 +0200
@@ -740,7 +740,7 @@
static struct saa7146_extension budget_extension = {
.name = "budget dvb\0",
- .flags = 0,
+ .flags = SAA7146_I2C_SHORT_DELAY,
.module = THIS_MODULE,
.pci_tbl = pci_tbl,
Well, the card now reacts *very* quickly, and I do not notice any side
effects.
Is there any reason why this flag is not set?
Carlo
--
* Se la Strada e la sua Virtu' non fossero state messe da parte,
* K * Carlo E. Prelz - fluido@xxxxxxxxx che bisogno ci sarebbe
* di parlare tanto di amore e di rettitudine? (Chuang-Tzu)
