[PATCH 5.15 35/45] ALSA: hda/tegra: Align BDL entry to 4KB boundary

Greg Kroah-Hartman
2022-09-21T15:56:52Z

From: Mohan Kumar <mkumard@nvidia.com>

[ Upstream commit 8d44e6044a0e885acdd01813768a0b27906d64fd ]

AZA HW may send a burst read/write request crossing 4K memory boundary.
The 4KB boundary is not guaranteed by Tegra HDA HW. Make SW change to
include the flag AZX_DCAPS_4K_BDLE_BOUNDARY to align BDLE to 4K
boundary.

Signed-off-by: Mohan Kumar <mkumard@nvidia.com>
Link: https://lore.kernel.org/r/20220905172420.3801-1-mkumard@nvidia.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
sound/pci/hda/hda_tegra.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sound/pci/hda/hda_tegra.c b/sound/pci/hda/hda_tegra.c
index 773f4903550a..f0e556f2ccf6 100644
--- a/sound/pci/hda/hda_tegra.c
+++ b/sound/pci/hda/hda_tegra.c
@@ -451,7 +451,8 @@ MODULE_DEVICE_TABLE(of, hda_tegra_match);
static int hda_tegra_probe(struct platform_device *pdev)
{
const unsigned int driver_flags = AZX_DCAPS_CORBRP_SELF_CLEAR |
- AZX_DCAPS_PM_RUNTIME;
+ AZX_DCAPS_PM_RUNTIME |
+ AZX_DCAPS_4K_BDLE_BOUNDARY;
struct snd_card *card;
struct azx *chip;
struct hda_tegra *hda;
--
2.35.1