.. SPDX-License-Identifier: GPL-2.0
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The cx88 driver
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===============
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Author: Gerd Hoffmann
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This is a v4l2 device driver for the cx2388x chip.
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Current status
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--------------
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video
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- Works.
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- Overlay isn't supported.
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audio
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- Works. The TV standard detection is made by the driver, as the
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hardware has bugs to auto-detect.
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- audio data dma (i.e. recording without loopback cable to the
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sound card) is supported via cx88-alsa.
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vbi
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- Works.
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How to add support for new cards
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--------------------------------
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The driver needs some config info for the TV cards. This stuff is in
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cx88-cards.c. If the driver doesn't work well you likely need a new
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entry for your card in that file. Check the kernel log (using dmesg)
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to see whenever the driver knows your card or not. There is a line
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like this one:
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.. code-block:: none
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cx8800[0]: subsystem: 0070:3400, board: Hauppauge WinTV \
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34xxx models [card=1,autodetected]
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If your card is listed as "board: UNKNOWN/GENERIC" it is unknown to
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the driver. What to do then?
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1) Try upgrading to the latest snapshot, maybe it has been added
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meanwhile.
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2) You can try to create a new entry yourself, have a look at
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cx88-cards.c. If that worked, mail me your changes as unified
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diff ("diff -u").
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3) Or you can mail me the config information. We need at least the
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following information to add the card:
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- the PCI Subsystem ID ("0070:3400" from the line above,
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"lspci -v" output is fine too).
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- the tuner type used by the card. You can try to find one by
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trial-and-error using the tuner=<n> insmod option. If you
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know which one the card has you can also have a look at the
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list in CARDLIST.tuner
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