Documentation/video4linux/README.cx88

   1 cx8800 release notes
   2 ====================
   3
   4 This is a v4l2 device driver for the cx2388x chip.
   5
   6
   7 current status
   8 ==============
   9
  10 video
  11         - Basically works.
  12         - For now, only capture and read(). Overlay isn't supported.
  13
  14 audio
  15         - The chip specs for the on-chip TV sound decoder are next
  16           to useless :-/
  17         - Neverless the builtin TV sound decoder starts working now,
  18           at least for some standards.
  19           FOR ANY REPORTS ON THIS PLEASE MENTION THE TV NORM YOU ARE
  20           USING.
  21         - Most tuner chips do provide mono sound, which may or may not
  22           be useable depending on the board design.  With the Hauppauge
  23           cards it works, so there is mono sound available as fallback.
  24         - audio data dma (i.e. recording without loopback cable to the
  25           sound card) is supported via cx88-alsa.
  26
  27 vbi
  28         - Code present. Works for NTSC closed caption. PAL and other
  29           TV norms may or may not work.
  30
  31
  32 how to add support for new cards
  33 ================================
  34
  35 The driver needs some config info for the TV cards.  This stuff is in
  36 cx88-cards.c.  If the driver doesn't work well you likely need a new
  37 entry for your card in that file.  Check the kernel log (using dmesg)
  38 to see whenever the driver knows your card or not.  There is a line
  39 like this one:
  40
  41         cx8800[0]: subsystem: 0070:3400, board: Hauppauge WinTV \
  42                 34xxx models [card=1,autodetected]
  43
  44 If your card is listed as "board: UNKNOWN/GENERIC" it is unknown to
  45 the driver.  What to do then?
  46
  47  (1) Try upgrading to the latest snapshot, maybe it has been added
  48      meanwhile.
  49  (2) You can try to create a new entry yourself, have a look at
  50      cx88-cards.c.  If that worked, mail me your changes as unified
  51      diff ("diff -u").
  52  (3) Or you can mail me the config information.  I need at least the
  53      following informations to add the card:
  54
  55      * the PCI Subsystem ID ("0070:3400" from the line above,
  56        "lspci -v" output is fine too).
  57      * the tuner type used by the card.  You can try to find one by
  58        trial-and-error using the tuner=<n> insmod option.  If you
  59        know which one the card has you can also have a look at the
  60        list in CARDLIST.tuner
  61
  62 Have fun,
  63
  64   Gerd
  65
  66 --
  67 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]