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Diffstat (limited to 'Documentation/media/v4l-drivers/cx88.rst')
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diff --git a/Documentation/media/v4l-drivers/cx88.rst b/Documentation/media/v4l-drivers/cx88.rst new file mode 100644 index 000000000000..b09ce36b921e --- /dev/null +++ b/Documentation/media/v4l-drivers/cx88.rst @@ -0,0 +1,67 @@ +cx8800 release notes +==================== + +This is a v4l2 device driver for the cx2388x chip. + + +current status +============== + +video + - Basically works. + - For now, only capture and read(). Overlay isn't supported. + +audio + - The chip specs for the on-chip TV sound decoder are next + to useless :-/ + - Neverless the builtin TV sound decoder starts working now, + at least for some standards. + FOR ANY REPORTS ON THIS PLEASE MENTION THE TV NORM YOU ARE + USING. + - Most tuner chips do provide mono sound, which may or may not + be useable depending on the board design. With the Hauppauge + cards it works, so there is mono sound available as fallback. + - audio data dma (i.e. recording without loopback cable to the + sound card) is supported via cx88-alsa. + +vbi + - Code present. Works for NTSC closed caption. PAL and other + TV norms may or may not work. + + +how to add support for new cards +================================ + +The driver needs some config info for the TV cards. This stuff is in +cx88-cards.c. If the driver doesn't work well you likely need a new +entry for your card in that file. Check the kernel log (using dmesg) +to see whenever the driver knows your card or not. There is a line +like this one: + + cx8800[0]: subsystem: 0070:3400, board: Hauppauge WinTV \ + 34xxx models [card=1,autodetected] + +If your card is listed as "board: UNKNOWN/GENERIC" it is unknown to +the driver. What to do then? + + (1) Try upgrading to the latest snapshot, maybe it has been added + meanwhile. + (2) You can try to create a new entry yourself, have a look at + cx88-cards.c. If that worked, mail me your changes as unified + diff ("diff -u"). + (3) Or you can mail me the config information. I need at least the + following information to add the card: + + * the PCI Subsystem ID ("0070:3400" from the line above, + "lspci -v" output is fine too). + * the tuner type used by the card. You can try to find one by + trial-and-error using the tuner=<n> insmod option. If you + know which one the card has you can also have a look at the + list in CARDLIST.tuner + +Have fun, + + Gerd + +-- +Gerd Knorr <kraxel@bytesex.org> [SuSE Labs] |