Re: [PATCH] ALSA: hda/hdmi: disable KAE for Intel Panther Lake

["Péter Ujfalusi" <peter.ujfalusi@linux.intel.com>]

On 11/06/2026 12:08, Péter Ujfalusi wrote:
> My setup is: laptop HDMI -> SYNIC HDMI audio extractor -> HDMI KVM ->
> monitor w/o speakers.
> I use the extractor to grab the audio and it is clean every time I play
> audio to HDMI.

Just to rule out iffy equipment on my side, I have connected the PTL
laptop to my Denon AVR both in SOF and legacy HDA mode. I cannot hear
any issue regarding to audio on my 5.1 speaker set.

> Can this be somehow related to the DP-to-HDMI converter? Have you tested
> that with other machine?
> Or a combination of xe2+DP-to-HDMI?
> 
> Ccing Uma for display side
>> This may also fix the silent Dolby TrueHD passthrough on Battlemage
>> reported in
>> https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/7515.
>> Battlemage uses the same keep-alive code path and TrueHD passthrough
>> is the same first-multichannel-stream pattern, but I could not test
>> that hardware.
>>
>> Workaround for affected systems without this patch:
>> snd_hda_codec_intelhdmi.enable_silent_stream=0.
>>
>>  sound/hda/codecs/hdmi/intelhdmi.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/sound/hda/codecs/hdmi/intelhdmi.c b/sound/hda/codecs/hdmi/intelhdmi.c
>> index 6a7882544a..52997caae9 100644
>> --- a/sound/hda/codecs/hdmi/intelhdmi.c
>> +++ b/sound/hda/codecs/hdmi/intelhdmi.c
>> @@ -791,7 +791,7 @@ static const struct hda_device_id snd_hda_id_intelhdmi[] = {
>>  	HDA_CODEC_ID_MODEL(0x8086281e, "Battlemage HDMI",	MODEL_ADLP),
>>  	HDA_CODEC_ID_MODEL(0x8086281f, "Raptor Lake P HDMI",	MODEL_ADLP),
>>  	HDA_CODEC_ID_MODEL(0x80862820, "Lunar Lake HDMI",	MODEL_ADLP),
>> -	HDA_CODEC_ID_MODEL(0x80862822, "Panther Lake HDMI",	MODEL_ADLP),
>> +	HDA_CODEC_ID_MODEL(0x80862822, "Panther Lake HDMI",	MODEL_TGL),
>>  	HDA_CODEC_ID_MODEL(0x80862823, "Wildcat Lake HDMI",	MODEL_ADLP),
>>  	HDA_CODEC_ID_MODEL(0x80862824, "Nova Lake HDMI",	MODEL_ADLP),
>>  	HDA_CODEC_ID_MODEL(0x80862882, "Valleyview2 HDMI",	MODEL_BYT),
> 

-- 
Péter