Sorry, I meant better stability, not SNR.
On Tue, Oct 6, 2009 at 12:41 PM, Li Bo <liboat@xxxxxxxxx> wrote:
> 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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