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ALSA: hda/core: Log stream DMA errors on interrupt

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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 <arunr@valvesoftware.com>
Cc: Arun Raghavan <arun@arunraghavan.net>
Link: https://patch.msgid.link/20260803-master-v1-1-9bcedb736978@valvesoftware.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Arun Raghavan
2026-08-03 15:07:52 -07:00
committed by Takashi Iwai
parent 1c03dd434e
commit dc9edf5878
1 changed files with 5 additions and 0 deletions
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5
sound/hda/core/controller.c
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@@ -688,6 +688,11 @@ int snd_hdac_bus_handle_stream_irq(struct hdac_bus *bus, unsigned int status,
sd_status = snd_hdac_stream_readb(azx_dev, SD_STS);
snd_hdac_stream_writeb(azx_dev, SD_STS, SD_INT_MASK);
handled |= 1 << azx_dev->index;
if (sd_status & (SD_INT_FIFO_ERR | SD_INT_DESC_ERR)) {
dev_warn_ratelimited(bus->dev,
"stream %u dma error: 0x%02x\n",
azx_dev->index, sd_status);
}
if ((!azx_dev->substream && !azx_dev->cstream) ||
!azx_dev->running || !(sd_status & SD_INT_COMPLETE))
continue;