[PATCH] ALSA: hda/core: Log stream DMA errors on interrupt

The stream descriptor status register reports FIFO and descriptor
errors, but these are currently cleared silently along with the rest
of the interrupt status. Log them, rate-limited, so DMA problems are
visible instead of only manifesting as audible glitches.

Observed on some AMD GPU HDMI audio controllers under specific low power
circumstances.

Signed-off-by: Arun Raghavan <[email protected]>
Cc: Arun Raghavan <[email protected]>
---
 sound/hda/core/controller.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/sound/hda/core/controller.c b/sound/hda/core/controller.c
index 69e11d62bbfa..5f1d2c132cec 100644
--- a/sound/hda/core/controller.c
+++ b/sound/hda/core/controller.c
@@ -682,6 +682,11 @@ int snd_hdac_bus_handle_stream_irq(struct hdac_bus *bu=
s, unsigned int status,
 =09=09=09sd_status =3D snd_hdac_stream_readb(azx_dev, SD_STS);
 =09=09=09snd_hdac_stream_writeb(azx_dev, SD_STS, SD_INT_MASK);
 =09=09=09handled |=3D 1 << azx_dev->index;
+=09=09=09if (sd_status & (SD_INT_FIFO_ERR | SD_INT_DESC_ERR)) {
+=09=09=09=09dev_warn_ratelimited(bus->dev,
+=09=09=09=09=09=09"stream %u dma error: 0x%02x\n",
+=09=09=09=09=09=09azx_dev->index, sd_status);
+=09=09=09}
 =09=09=09if ((!azx_dev->substream && !azx_dev->cstream) ||
 =09=09=09    !azx_dev->running || !(sd_status & SD_INT_COMPLETE))
 =09=09=09=09continue;

---
base-commit: 848acc8ffe1b7cd5f1bf427b93069becfebc2c9d
change-id: 20260803-master-48a36c6e70e0

Best regards,
--=20
Arun Raghavan <[email protected]>