[Bug 105848] [KBL] Distortion Noisy Audio when continuously resolution changed on DisplayPort...

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Fri Apr 13 09:29:42 UTC 2018


https://bugs.freedesktop.org/show_bug.cgi?id=105848

--- Comment #14 from Abhijeet Kumar <abhijeet.kumar at intel.com> ---
(In reply to Sriram Periyasamy from comment #10)
> Hi Abhijeet,
> 
> Standard channel map from HDA HDMI driver is configured properly at the time
> of stream start and the register writes are proper. The channel map

Hey Sriram,
Can you please enable CONFIG_SND_DEBUG_VERBOSE and share which stream slot in
audio packet points to which converter channel ?
https://elixir.bootlin.com/linux/v4.16.2/source/sound/hda/hdmi_chmap.c#L325


(In reply to Jani Nikula from comment #11)
> (In reply to Abhijeet Kumar from comment #9)
> > AUD_OUT_CHAN_MAP     (0x65088) 0x00000000  Audio Output Channel Mapping
> 
> We don't touch that register.

Thanks, later after looking at the bspec I realized that no driver actually
touches it. It is in response to a Get Audio Output Converter Widget command.

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