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ALSA: hda - Add support for HDMI HBR passthrough

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Passing IEC 61937 encapsulated compressed audio at bitrates over 6.144
Mbps (i.e. more than a single 2-channel 16-bit 192kHz IEC 60958 link)
over HDMI requires the use of HBR Audio Stream Packets instead of Audio
Sample Packets.

Enable HBR mode when the stream has 8 channels and the Non-PCM bit is
set.

If the audio converter is not connected to any HBR-capable pins, return
-EINVAL in prepare().

Signed-off-by: Anssi Hannula <anssi.hannula@iki.fi>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Anssi Hannula
2010-08-03 13:28:58 +03:00
committed by Takashi Iwai
parent 32c168c892
commit ea87d1c493
4 changed files with 44 additions and 5 deletions
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3
sound/pci/hda/patch_intelhdmi.c
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@@ -66,8 +66,7 @@ static int intel_hdmi_playback_pcm_prepare(struct hda_pcm_stream *hinfo,
hdmi_setup_audio_infoframe(codec, hinfo->nid, substream);
hdmi_setup_stream(codec, hinfo->nid, stream_tag, format);
return 0;
return hdmi_setup_stream(codec, hinfo->nid, stream_tag, format);
}
static int intel_hdmi_playback_pcm_cleanup(struct hda_pcm_stream *hinfo,