em28xx: Terratec Grabby no sound

[Florian Klink <flokli@xxxxxxxxx>]

Hi,

I recently bought a Terratec Grabby. The device has a S-Video and 3 
Cinch
cables (sound left, sound right, video). I want to record some video
cassettes with it. (with a cinch-scart adapter).

I checked the signal, there is audio and video on it.

When I try to "play" the capture device with e.g. mplayer, I see "no
sound", even with various options.

I can hear sound only by doing "arecord -D hw:2,0 -r 32000 -c 2 -f 
S16_LE |
aplay -", but as soon as mplayer is starting, I can't hear anything
anymore.

...which means that using alsa as the sound device with mplayer doesn't
work either.

Am I missing something?

I checked the source code, Terratec Grabby support was introduced with
4557af9c5338605c85fe54f5ebba3d4b14a60ab8:

-----------------------------------------
diff --git a/drivers/media/video/em28xx/em28xx-cards.c 
b/drivers/media/video/em28xx/em28xx-cards.c
index 7cb93fb..b4c78f2 100644
--- a/drivers/media/video/em28xx/em28xx-cards.c
+++ b/drivers/media/video/em28xx/em28xx-cards.c
@@ -1347,6 +1347,22 @@ struct em28xx_board em28xx_boards[] = {
 			.amux     = EM28XX_AMUX_VIDEO,
 		} },
 	},
+	[EM2860_BOARD_TERRATEC_GRABBY] = {
+		.name            = "Terratec Grabby",
+		.vchannels       = 2,
+		.tuner_type      = TUNER_ABSENT,
+		.decoder         = EM28XX_SAA711X,
+		.xclk            = EM28XX_XCLK_FREQUENCY_12MHZ,
+		.input           = { {
+			.type     = EM28XX_VMUX_COMPOSITE1,
+			.vmux     = SAA7115_COMPOSITE0,
+			.amux     = EM28XX_AMUX_VIDEO2,
+		}, {
+			.type     = EM28XX_VMUX_SVIDEO,
+			.vmux     = SAA7115_SVIDEO3,
+			.amux     = EM28XX_AMUX_VIDEO2,
+		} },
+	},
 };
 const unsigned int em28xx_bcount = ARRAY_SIZE(em28xx_boards);

@@ -1410,6 +1426,8 @@ struct usb_device_id em28xx_id_table[] = {
 			.driver_info = EM2870_BOARD_TERRATEC_XS },
 	{ USB_DEVICE(0x0ccd, 0x0047),
 			.driver_info = EM2880_BOARD_TERRATEC_PRODIGY_XS },
+	{ USB_DEVICE(0x0ccd, 0x0096),
+			.driver_info = EM2860_BOARD_TERRATEC_GRABBY },
 	{ USB_DEVICE(0x185b, 0x2870),
 			.driver_info = EM2870_BOARD_COMPRO_VIDEOMATE },
 	{ USB_DEVICE(0x185b, 0x2041),
diff --git a/drivers/media/video/em28xx/em28xx.h 
b/drivers/media/video/em28xx/em28xx.h
index e801f78..fa2fb41 100644
--- a/drivers/media/video/em28xx/em28xx.h
+++ b/drivers/media/video/em28xx/em28xx.h
@@ -103,6 +103,7 @@
 #define EM2860_BOARD_EASYCAP                      64
 #define EM2820_BOARD_IODATA_GVMVP_SZ		  65
 #define EM2880_BOARD_EMPIRE_DUAL_TV		  66
+#define EM2860_BOARD_TERRATEC_GRABBY		  67

 /* Limits minimum and default number of buffers */
 #define EM28XX_MIN_BUF 4
-----------------------------------------

Is there maybe a wrong amux set? Which one could it be?
Is sound-usb-audio somehow conflicting with em28xx module?

I hope you have an idea what is wrong here!

Florian Klink

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