* [PATCH] ALSA: hda/intel: increase default bdl_pos_adj for Nvidia controllers
@ 2026-02-25 14:53 Panagiotis Foliadis
2026-02-25 14:58 ` Takashi Iwai
0 siblings, 1 reply; 3+ messages in thread
From: Panagiotis Foliadis @ 2026-02-25 14:53 UTC (permalink / raw)
To: Jaroslav Kysela, Takashi Iwai
Cc: linux-sound, linux-kernel, stable, Charalampos Mitrodimas,
Panagiotis Foliadis
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>
---
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 6fddf400c4a3d67042e421b81ac3a13607a24bcd..3f434994c18db64019d3b4cfff8a7cc8764b5f26 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;
}
---
base-commit: 6de23f81a5e08be8fbf5e8d7e9febc72a5b5f27f
change-id: 20260223-nvidia-audio-fix-76f75db4e7c2
Best regards,
--
Panagiotis Foliadis <pfoliadis@posteo.net>
^ permalink raw reply related [flat|nested] 3+ messages in thread
* [PATCH] ALSA: hda/intel: increase default bdl_pos_adj for Nvidia controllers
@ 2026-02-25 14:54 Panagiotis Foliadis
0 siblings, 0 replies; 3+ messages in thread
From: Panagiotis Foliadis @ 2026-02-25 14:54 UTC (permalink / raw)
To: Jaroslav Kysela, Takashi Iwai
Cc: linux-sound, linux-kernel, stable, Charalampos Mitrodimas,
Panagiotis Foliadis
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>
---
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 6fddf400c4a3d67042e421b81ac3a13607a24bcd..3f434994c18db64019d3b4cfff8a7cc8764b5f26 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;
}
---
base-commit: 6de23f81a5e08be8fbf5e8d7e9febc72a5b5f27f
change-id: 20260223-nvidia-audio-fix-76f75db4e7c2
Best regards,
--
Panagiotis Foliadis <pfoliadis@posteo.net>
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] ALSA: hda/intel: increase default bdl_pos_adj for Nvidia controllers
2026-02-25 14:53 [PATCH] ALSA: hda/intel: increase default bdl_pos_adj for Nvidia controllers Panagiotis Foliadis
@ 2026-02-25 14:58 ` Takashi Iwai
0 siblings, 0 replies; 3+ messages in thread
From: Takashi Iwai @ 2026-02-25 14:58 UTC (permalink / raw)
To: Panagiotis Foliadis
Cc: Jaroslav Kysela, Takashi Iwai, linux-sound, linux-kernel, stable,
Charalampos Mitrodimas
On Wed, 25 Feb 2026 15:53:43 +0100,
Panagiotis Foliadis wrote:
>
> 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>
Thanks, applied now.
Takashi
^ permalink raw reply [flat|nested] 3+ messages in thread
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