Hi, Takashi
According to our HW test, S/PDIF at 48K sample rate has best SNR, so
this limit can make S/PDIF work better.
On Mon, Oct 5, 2009 at 11:14 PM, Takashi Iwai <tiwai@xxxxxxx> wrote:
> At Mon, 5 Oct 2009 22:27:43 +0800,
> Li Bo wrote:
>>
>> [ALSA] HDA VIA: Add 48K sample rate limit for S/PDIF streams.
>>
>> Signed-off-by: Lydia Wang <lydiawang@xxxxxxxxxxxxxx>
>
> Any reason?
>
>
> Takashi
>
>>
>> Index: sound-2.6/sound/pci/hda/patch_via.c
>> ===================================================================
>> --- sound-2.6.orig/sound/pci/hda/patch_via.c 2009-10-05 15:11:02.000000000 +0800
>> +++ sound-2.6/sound/pci/hda/patch_via.c 2009-10-05 15:11:04.000000000 +0800
>> @@ -1228,6 +1228,7 @@
>> .substreams = 1,
>> .channels_min = 2,
>> .channels_max = 2,
>> + .rates = SNDRV_PCM_RATE_48000,
>> /* NID is set in via_build_pcms */
>> .ops = {
>> .open = via_dig_playback_pcm_open,
>> @@ -1241,6 +1242,7 @@
>> .substreams = 1,
>> .channels_min = 2,
>> .channels_max = 2,
>> + .rates = SNDRV_PCM_RATE_48000,
>> };
>>
>> static int via_build_controls(struct hda_codec *codec)
>> @@ -2042,6 +2044,7 @@
>> .substreams = 1,
>> .channels_min = 2,
>> .channels_max = 2,
>> + .rates = SNDRV_PCM_RATE_48000,
>> /* NID is set in via_build_pcms */
>> .ops = {
>> .open = via_dig_playback_pcm_open,
>> @@ -2657,6 +2660,7 @@
>> .substreams = 1,
>> .channels_min = 2,
>> .channels_max = 2,
>> + .rates = SNDRV_PCM_RATE_48000,
>> /* NID is set in via_build_pcms */
>> .ops = {
>> .open = via_dig_playback_pcm_open,
>> @@ -3137,6 +3141,7 @@
>> .substreams = 2,
>> .channels_min = 2,
>> .channels_max = 2,
>> + .rates = SNDRV_PCM_RATE_48000,
>> /* NID is set in via_build_pcms */
>> .ops = {
>> .open = via_dig_playback_pcm_open,
>> @@ -3581,6 +3586,7 @@
>> .substreams = 2,
>> .channels_min = 2,
>> .channels_max = 2,
>> + .rates = SNDRV_PCM_RATE_48000,
>> /* NID is set in via_build_pcms */
>> .ops = {
>> .open = via_dig_playback_pcm_open,
>>
>
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