summaryrefslogtreecommitdiffstats
path: root/Documentation/video4linux/README.cx88
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/video4linux/README.cx88')
-rw-r--r--Documentation/video4linux/README.cx8869
1 files changed, 69 insertions, 0 deletions
diff --git a/Documentation/video4linux/README.cx88 b/Documentation/video4linux/README.cx88
new file mode 100644
index 000000000000..897ab834839a
--- /dev/null
+++ b/Documentation/video4linux/README.cx88
@@ -0,0 +1,69 @@
+
+cx8800 release notes
+====================
+
+This is a v4l2 device driver for the cx2388x chip.
+
+
+current status
+==============
+
+video
+ - Basically works.
+ - Some minor image quality glitches.
+ - For now only capture, overlay support isn't completed yet.
+
+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 PAL-BG. Other TV norms need other code ...
+ 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) should be possible, but there is no code yet ...
+
+vbi
+ - some code present. Doesn't crash any more, but also doesn't
+ work yet ...
+
+
+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 informations 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]