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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-13 10:32:54 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-13 10:32:54 -0800 |
| commit | 66dc918d42eaaa9afe42a47d07526765162017a9 (patch) | |
| tree | 947411841773dfb076f1aa78bc5be868bc4281a6 /sound/core/pcm_lib.c | |
| parent | b2034d474b7e1e8578bd5c2977024b51693269d9 (diff) | |
| parent | 6db9a0f326d3144d790d9479309df480a8f562e4 (diff) | |
| download | linux-66dc918d42eaaa9afe42a47d07526765162017a9.tar.bz2 | |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6: (348 commits)
ALSA: hda - Fix NULL-derefence with a single mic in STAC auto-mic detection
ALSA: hda - Add missing NID 0x19 fixup for Sony VAIO
ALSA: hda - Fix ALC275 enable hardware EQ for SONY VAIO
ALSA: oxygen: fix Xonar DG input
ALSA: hda - Fix EAPD on Lenovo NB ALC269 to low
ALSA: hda - Fix missing EAPD for Acer 4930G
ALSA: hda: Disable 4/6 channels on some NVIDIA GPUs.
ALSA: hda - Add static_hdmi_pcm option to HDMI codec parser
ALSA: hda - Don't refer ELD when unplugged
ASoC: tpa6130a2: Fix compiler warning
ASoC: tlv320dac33: Add DAPM selection for LOM invert
ASoC: DMIC codec: Adding a generic DMIC codec
ALSA: snd-usb-us122l: Fix missing NULL checks
ALSA: snd-usb-us122l: Fix MIDI output
ASoC: soc-cache: Fix invalid memory access during snd_soc_lzo_cache_sync()
ASoC: Fix section mismatch in wm8995.c
ALSA: oxygen: add S/PDIF source selection for Claro cards
ALSA: oxygen: fix CD/MIDI for X-Meridian (2G)
ASoC: fix migor audio build
ALSA: include delay.h for msleep in Xonar DG support
...
Diffstat (limited to 'sound/core/pcm_lib.c')
| -rw-r--r-- | sound/core/pcm_lib.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c index 11446a1506da..a82e3756a72d 100644 --- a/sound/core/pcm_lib.c +++ b/sound/core/pcm_lib.c @@ -373,6 +373,27 @@ static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, (unsigned long)new_hw_ptr, (unsigned long)runtime->hw_ptr_base); } + + if (runtime->no_period_wakeup) { + /* + * Without regular period interrupts, we have to check + * the elapsed time to detect xruns. + */ + jdelta = jiffies - runtime->hw_ptr_jiffies; + if (jdelta < runtime->hw_ptr_buffer_jiffies / 2) + goto no_delta_check; + hdelta = jdelta - delta * HZ / runtime->rate; + while (hdelta > runtime->hw_ptr_buffer_jiffies / 2 + 1) { + delta += runtime->buffer_size; + hw_base += runtime->buffer_size; + if (hw_base >= runtime->boundary) + hw_base = 0; + new_hw_ptr = hw_base + pos; + hdelta -= runtime->hw_ptr_buffer_jiffies; + } + goto no_delta_check; + } + /* something must be really wrong */ if (delta >= runtime->buffer_size + runtime->period_size) { hw_ptr_error(substream, @@ -442,6 +463,7 @@ static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, (long)old_hw_ptr); } + no_delta_check: if (runtime->status->hw_ptr == new_hw_ptr) return 0; |