tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1.. SPDX-License-Identifier: GPL-2.0
2
3The cx88 driver
4===============
5
6Author: Gerd Hoffmann
7
8This is a v4l2 device driver for the cx2388x chip.
9
10
11Current status
12--------------
13
14video
15 - Works.
16 - Overlay isn't supported.
17
18audio
19 - Works. The TV standard detection is made by the driver, as the
20 hardware has bugs to auto-detect.
21 - audio data dma (i.e. recording without loopback cable to the
22 sound card) is supported via cx88-alsa.
23
24vbi
25 - Works.
26
27
28How to add support for new cards
29--------------------------------
30
31The driver needs some config info for the TV cards. This stuff is in
32cx88-cards.c. If the driver doesn't work well you likely need a new
33entry for your card in that file. Check the kernel log (using dmesg)
34to see whenever the driver knows your card or not. There is a line
35like this one:
36
37.. code-block:: none
38
39 cx8800[0]: subsystem: 0070:3400, board: Hauppauge WinTV \
40 34xxx models [card=1,autodetected]
41
42If your card is listed as "board: UNKNOWN/GENERIC" it is unknown to
43the driver. What to do then?
44
451) Try upgrading to the latest snapshot, maybe it has been added
46 meanwhile.
472) You can try to create a new entry yourself, have a look at
48 cx88-cards.c. If that worked, mail me your changes as unified
49 diff ("diff -u").
503) Or you can mail me the config information. We need at least the
51 following information to add the card:
52
53 - the PCI Subsystem ID ("0070:3400" from the line above,
54 "lspci -v" output is fine too).
55 - the tuner type used by the card. You can try to find one by
56 trial-and-error using the tuner=<n> insmod option. If you
57 know which one the card has you can also have a look at the
58 list in CARDLIST.tuner