From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- Documentation/admin-guide/media/cx88.rst | 58 ++++++++++++++++++++++++++++++++ 1 file changed, 58 insertions(+) create mode 100644 Documentation/admin-guide/media/cx88.rst (limited to 'Documentation/admin-guide/media/cx88.rst') diff --git a/Documentation/admin-guide/media/cx88.rst b/Documentation/admin-guide/media/cx88.rst new file mode 100644 index 000000000..e4badb181 --- /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= insmod option. If you + know which one the card has you can also have a look at the + list in CARDLIST.tuner -- cgit v1.2.3