From: Gerd Knorr <kraxel@bytesex.org>

This patch updates the bttv driver.  Changes:

  (1) several card-specific tweaks.
  (2) make software vs. hardware i2c configurable per TV card.
  (3) reinitialize image parameters after chip reset.
  (4) make bttv quite by default on frame drops.
  (5) new insmod option: "debug_latency=1" to enable frame drop
      debug messages.

bttv is quite sensitive to irq latencies, especially when capturing both
video and vbi.  There are several reports about problems due to this, I don't
see that on my machines through.  (5) dumps a stracktrace if the driver
thinks the frame drop is is caused by high latencies as experiment, lets see
whenever that helps ...