While I'm sure this isn't the answer you would like to hear, I too have
a MCP51 based board, and get DMA errors with it. I've tried numerous
and varied configurations to eliminate the errors, but the only thing
that works with consistency is turn disable DMA in ivtv-streams.c. I'm
too lazy to write a patch for it, but the code looks like this (~line
80)
{ /* IVTV_ENC_STREAM_TYPE_MPG */
"encoder MPEG",
VFL_TYPE_GRABBER, 0,
PCI_DMA_FROMDEVICE, 1, V4L2_BUF_TYPE_VIDEO_CAPTURE,
&ivtv_v4l2_enc_fops
},
Note the 1 after PCI_DMA_FROMDEVICE, which will set the encoder to use
PIO instead of DMA. This will dramatically increase the cpu usage of
ivtv, but it does work, and won't hang the tuner card.
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