[PATCH 6.6 042/299] ALSA: hda: Increase default bdl_pos_adj for Apollo Lake

Greg Kroah-Hartman
2024-02-27T13:48:26Z

From: Rui Salvaterra <rsalvaterra@gmail.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@gmail.com>
Reviewed-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Link: https://lore.kernel.org/r/20240122114512.55808-3-rsalvaterra@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.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 1596157556862..a6a9d353fe635 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