linux-kernel - [PATCH AUTOSEL 6.6 11/38] ALSA: hda: Increase default bdl_pos

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Date: Wed,  7 Feb 2024 16:22:57 -0500
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Rui Salvaterra <rsalvaterra@...il.com>,
	Amadeusz Sławiński <amadeuszx.slawinski@...ux.intel.com>,
	Takashi Iwai <tiwai@...e.de>,
	Sasha Levin <sashal@...nel.org>,
	perex@...ex.cz,
	tiwai@...e.com,
	kai.vehmanen@...ux.intel.com,
	pierre-louis.bossart@...ux.intel.com,
	maarten.lankhorst@...ux.intel.com,
	siyanteng@...ngson.cn,
	jasontao@...nfly.com,
	linux-sound@...r.kernel.org
Subject: [PATCH AUTOSEL 6.6 11/38] ALSA: hda: Increase default bdl_pos_adj for Apollo Lake

From: Rui Salvaterra <rsalvaterra@...il.com>

[ Upstream commit 56beedc88405fd8022edfd1c2e63d1bc6c95efcb ]

Apollo Lake seems to also suffer from IRQ timing issues. After being up for ~4
minutes, a Pentium N4200 system ends up falling back to workqueue-based IRQ
handling:

[  208.019906] snd_hda_intel 0000:00:0e.0: IRQ timing workaround is activated
for card #0. Suggest a bigger bdl_pos_adj.

Unfortunately, the Baytrail and Braswell workaround value of 32 samples isn't
enough to fix the issue here. Default to 64 samples.

Signed-off-by: Rui Salvaterra <rsalvaterra@...il.com>
Reviewed-by: Amadeusz Sławiński <amadeuszx.slawinski@...ux.intel.com>
Link: https://lore.kernel.org/r/20240122114512.55808-3-rsalvaterra@gmail.com
Signed-off-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 sound/pci/hda/hda_intel.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 4a9772ebdf8d..4f2f36658a12 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -1738,6 +1738,8 @@ static int default_bdl_pos_adj(struct azx *chip)
 		case PCI_DEVICE_ID_INTEL_HDA_BYT:
 		case PCI_DEVICE_ID_INTEL_HDA_BSW:
 			return 32;
+		case PCI_DEVICE_ID_INTEL_HDA_APL:
+			return 64;
 		}
 	}
 
-- 
2.43.0