diff options
Diffstat (limited to 'sound/hda/hdac_stream.c')
| -rw-r--r-- | sound/hda/hdac_stream.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/sound/hda/hdac_stream.c b/sound/hda/hdac_stream.c index 2633a4bb1d85..5382894bebab 100644 --- a/sound/hda/hdac_stream.c +++ b/sound/hda/hdac_stream.c @@ -258,6 +258,8 @@ int snd_hdac_stream_setup(struct hdac_stream *azx_dev) struct hdac_bus *bus = azx_dev->bus; struct snd_pcm_runtime *runtime; unsigned int val; + u16 reg; + int ret; if (azx_dev->substream) runtime = azx_dev->substream->runtime; @@ -300,6 +302,12 @@ int snd_hdac_stream_setup(struct hdac_stream *azx_dev) /* set the interrupt enable bits in the descriptor control register */ snd_hdac_stream_updatel(azx_dev, SD_CTL, 0, SD_INT_MASK); + /* Once SDxFMT is set, the controller programs SDxFIFOS to non-zero value. */ + ret = snd_hdac_stream_readw_poll(azx_dev, SD_FIFOSIZE, reg, reg & AZX_SD_FIFOSIZE_MASK, + 3, 300); + if (ret) + dev_dbg(bus->dev, "polling SD_FIFOSIZE 0x%04x failed: %d\n", + AZX_REG_SD_FIFOSIZE, ret); azx_dev->fifo_size = snd_hdac_stream_readw(azx_dev, SD_FIFOSIZE) + 1; /* when LPIB delay correction gives a small negative value, |