diff options
author | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2020-03-04 13:08:03 +0100 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2020-04-14 10:34:58 +0200 |
commit | 32e2eae23f8fd1b90d86f4d04ca9790952d9d928 (patch) | |
tree | ce1fc74c4870aed1b105e92d22efbd4d762a5bb7 /Documentation/admin-guide/media/cx88.rst | |
parent | 2e9a7e0bc191c6dc97a0b3cb994b83834179a42b (diff) |
media: docs: move user-facing docs to the admin guide
Most of the driver-specific documentation is meant to help
users of the media subsystem.
Move them to the admin-guide.
It should be noticed, however, that several of those files
are outdated and will require further work in order to make
them useful again.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'Documentation/admin-guide/media/cx88.rst')
-rw-r--r-- | Documentation/admin-guide/media/cx88.rst | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/Documentation/admin-guide/media/cx88.rst b/Documentation/admin-guide/media/cx88.rst new file mode 100644 index 000000000000..e4badb18199d --- /dev/null +++ b/Documentation/admin-guide/media/cx88.rst @@ -0,0 +1,58 @@ +.. SPDX-License-Identifier: GPL-2.0 + +The cx88 driver +=============== + +Author: Gerd Hoffmann + +This is a v4l2 device driver for the cx2388x chip. + + +Current status +-------------- + +video + - Works. + - Overlay isn't supported. + +audio + - Works. The TV standard detection is made by the driver, as the + hardware has bugs to auto-detect. + - audio data dma (i.e. recording without loopback cable to the + sound card) is supported via cx88-alsa. + +vbi + - Works. + + +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: + +.. code-block:: none + + 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. We 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 |