First of all, congratulations on the great work for the ivtv driver.
I've encountered a minor problem for PAL output via the saa7127:
black level is set to 0x23 (=37.8IRE), which gives a picture that
is too dark. For a black level at 43IRE (?PAL standard?), the black
level register (5D) should be set to 51=0x33 (according to the
data sheets this is also the recommended value). Next to that, it
also gives much nicer results.
The following change to saa7127.c, line 201 (0.2.0-rc3 release)
should do the trick:
{SAA7127_REG_BLACK_LEVEL, 0x23},
->
{SAA7127_REG_BLACK_LEVEL, 0x33},
For NTSC, the difference between recommended values in the data sheet
and saa7127.c is much smaller:
0x39 (=47.0IRE) and 0x3a (=47.3IRE), ?spec=47.5IRE?.
I'm no video expert, so can someone please take a look at the data
sheets and check these numbers (also the GAINU & GAINV)?
(you may have to use the saa7129 data sheets as the saa7127 is
no longer available)
Thanks,
_Ramon
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