[alsa-devel] ALSA patch Nvidia 8 channel hdmi audio

[Takashi Iwai]

At Wed, 3 Jun 2009 11:34:00 +0200,
Alan Alan wrote:
> 
> Hello Takashi !
> 
> What should this patch do ?

The patch removes the restriction patch_nvhdmi.c sets.  Instead,
the driver tries to detect the supported format, rate, etc from the
codec widget information.

> Is it a cure for the 96, 192khz or 24bit sample playback problem ?

Possibly.

> If so, will it resample or natievly pass the stream to the amplifier ?

It just enables the native support, possibly.

And, don't forget to give back the alsa-info.sh output (run with
--no-upload option).


Takashi

> 
> Thank you
> 
> Alan
> 
> 2009/6/3 Takashi Iwai <tiwai at suse.de>
> 
>     At Wed, 3 Jun 2009 10:00:24 +0200,
>     Alan Alan wrote:
>     >
>     > Hello Wei !
>     >
>     > Thanks for replying.
>     > I tested it with speaker-test and xbmc babylon. Both had problems with
>     > channel mapping.
>     > I used this command:
>     >
>     > speaker-test -Dhdmi -c6
>     > or
>     > speaker-test -Dhdmi -c8
>     >
>     > alternatively you could try
>     >
>     > speaker-test -Dhw:0,3 -c6
>     >
>     >
>     > I had to rund Xorg first and have the command from an xterm, becasue
>     from a
>     > normal terminal it would not work.
>     > I think that is normal as a limitation of hdmi.
>     >
>     > What about the support for 24bits 192khz sound ?
>     >
>     > speaker-test -Dhdmi -c6  -r192000 does not work.
>    
>     How about the patch below?
>    
>     Also, could you give alsa-info.sh output?
> 
>     Takashi
>    
>     ---
>     diff --git a/sound/pci/hda/patch_nvhdmi.c b/sound/pci/hda/patch_nvhdmi.c
>     index f5792e2..48443de 100644
>     --- a/sound/pci/hda/patch_nvhdmi.c
>     +++ b/sound/pci/hda/patch_nvhdmi.c
>     @@ -258,9 +258,11 @@ static struct hda_pcm_stream
>     nvhdmi_pcm_digital_playback_8ch = {
>            .channels_min = 2,
>            .channels_max = 8,
>            .nid = Nv_Master_Convert_nid,
>     +#if 0
>            .rates = SNDRV_PCM_RATE_48000,
>            .maxbps = 16,
>            .formats = SNDRV_PCM_FMTBIT_S16_LE,
>     +#endif
>            .ops = {
>                    .open = nvhdmi_dig_playback_pcm_open,
>                    .close = nvhdmi_dig_playback_pcm_close_8ch,
>     @@ -273,9 +275,11 @@ static struct hda_pcm_stream
>     nvhdmi_pcm_digital_playback_2ch = {
>            .channels_min = 2,
>            .channels_max = 2,
>            .nid = Nv_Master_Convert_nid,
>     +#if 0
>            .rates = SNDRV_PCM_RATE_48000,
>            .maxbps = 16,
>            .formats = SNDRV_PCM_FMTBIT_S16_LE,
>     +#endif
>            .ops = {
>                    .open = nvhdmi_dig_playback_pcm_open,
>                    .close = nvhdmi_dig_playback_pcm_close_2ch,
> 
>