diff mbox series

ALSA: hda/tegra: Align BDL entry to 4KB boundary

Message ID 20220905172420.3801-1-mkumard@nvidia.com (mailing list archive)
State Accepted
Commit 8d44e6044a0e885acdd01813768a0b27906d64fd
Headers show
Series ALSA: hda/tegra: Align BDL entry to 4KB boundary | expand

Commit Message

Mohan Kumar Sept. 5, 2022, 5:24 p.m. UTC 
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>
---
 sound/pci/hda/hda_tegra.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Comments

Takashi Iwai Sept. 6, 2022, 5:13 a.m. UTC | #1 
On Mon, 05 Sep 2022 19:24:20 +0200,
Mohan Kumar wrote:
> 
> 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>

Thanks, applied.


Takashi
diff mbox series

Patch

diff --git a/sound/pci/hda/hda_tegra.c b/sound/pci/hda/hda_tegra.c
index 7debb2c76aa6..976a112c7d00 100644
--- a/sound/pci/hda/hda_tegra.c
+++ b/sound/pci/hda/hda_tegra.c
@@ -474,7 +474,8 @@  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;