[alsa-devel] [PATCH 18/31] HDA patch_via.c: Add 48K sample rate limit for S/PDIF streams.

Li Bo liboat at gmail.com
Thu Oct 8 07:31:22 CEST 2009

On Tue, Oct 6, 2009 at 8:21 PM, Harald Welte <laforge at gnumonks.org> wrote:
> Hi all,
> I agree with the previous posts in this thread.
> The use of > 48kHz sample rate is common use today, so if the hardware supports
> it, the driver should not disable it.
> Since there are some users that successfully use SPDIF with > 48kHz, it cannot
> be a general hardware problem.  If there's a general hardware problem, then
> it would never work for anyone.
> If there are some codec chips/variants/versions, or even certain boards that
> have bad SPDIf signal performance, then we should black-list those bad
> chips/versions/boards, rather than disable the feature for everyone.
> Also, as far as I understand, the worst thing that can happen when a "too high"
> sample rate is used:  It will not work for some users on some hardware.  That,
> I think, is acceptable (if no workaround / black-list can be created).
> This would be different if there are other effects:  If the high sample rate
> would cause some hardware-lock-up or similar, then it definitely needs to be
> disabled.
> Regards,
> --
> - Harald Welte <laforge at gnumonks.org>           http://laforge.gnumonks.org/
> ============================================================================
> "Privacy in residential applications is a desirable marketing option."
>                                                  (ETSI EN 300 175-7 Ch. A6)

Hi, All
  According to the discussion, this patch is canceled, thank you for suggestion.

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