[PATCH 6.18 157/314] ALSA: hda/intel: increase default bdl_pos_adj for Nvidia controllers

Sasha Levin
2026-03-10T11:27:10Z

From: Panagiotis Foliadis <pfoliadis@posteo.net>

commit e9fb2028f1eb563e653cff3b0d1c87c5e0203d45 upstream.

The default bdl_pos_adj of 32 for Nvidia HDA controllers is
insufficient on GA102 (and likely other recent Nvidia GPUs) after S3
suspend/resume. The controller's DMA timing degrades after resume,
causing premature IRQ detection in azx_position_ok() which results in
silent HDMI/DP audio output despite userspace reporting a valid
playback state and correct ELD data.

Increase bdl_pos_adj to 64 for AZX_DRIVER_NVIDIA, matching the value
already used by Intel Apollo Lake for the same class of timing issue.

Cc: stable@vger.kernel.org
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=221069
Suggested-by: Charalampos Mitrodimas <charmitro@posteo.net>
Signed-off-by: Panagiotis Foliadis <pfoliadis@posteo.net>
Link: https://patch.msgid.link/20260225-nvidia-audio-fix-v1-1-b1383c37ec49@posteo.net
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
sound/hda/controllers/intel.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/sound/hda/controllers/intel.c b/sound/hda/controllers/intel.c
index a19258c95886c..9306e7a31f02b 100644
--- a/sound/hda/controllers/intel.c
+++ b/sound/hda/controllers/intel.c
@@ -1751,6 +1751,8 @@ static int default_bdl_pos_adj(struct azx *chip)
return 1;
case AZX_DRIVER_ZHAOXINHDMI:
return 128;
+ case AZX_DRIVER_NVIDIA:
+ return 64;
default:
return 32;
}
--
2.51.0