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authorJaroslav Kysela <perex@perex.cz>2010-08-18 08:08:17 -0400
committerTakashi Iwai <tiwai@suse.de>2010-08-18 09:10:59 -0400
commit56385a12d9bb9e173751f74b6c430742018cafc0 (patch)
treea0ccadcd4ab6fe2fa7b7dbde1a8b542b7b105c15 /include
parenta5ba6beb839cfa288960c92cd2668a2601c24dda (diff)
ALSA: emu10k1 - delay the PCM interrupts (add pcm_irq_delay parameter)
With some hardware combinations, the PCM interrupts are acknowledged before the period boundary from the emu10k1 chip. The midlevel PCM code gets confused and the playback stream is interrupted. It seems that the interrupt processing shift by 2 samples is enough to fix this issue. This default value does not harm other, non-affected hardware. More information: Kernel bugzilla bug#16300 [A copmile warning fixed by tiwai] Signed-off-by: Jaroslav Kysela <perex@perex.cz> Cc: <stable@kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'include')
-rw-r--r--include/sound/emu10k1.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/sound/emu10k1.h b/include/sound/emu10k1.h
index 6a664c3f7c1e..7dc97d12253c 100644
--- a/include/sound/emu10k1.h
+++ b/include/sound/emu10k1.h
@@ -1707,6 +1707,7 @@ struct snd_emu10k1 {
1707 unsigned int card_type; /* EMU10K1_CARD_* */ 1707 unsigned int card_type; /* EMU10K1_CARD_* */
1708 unsigned int ecard_ctrl; /* ecard control bits */ 1708 unsigned int ecard_ctrl; /* ecard control bits */
1709 unsigned long dma_mask; /* PCI DMA mask */ 1709 unsigned long dma_mask; /* PCI DMA mask */
1710 unsigned int delay_pcm_irq; /* in samples */
1710 int max_cache_pages; /* max memory size / PAGE_SIZE */ 1711 int max_cache_pages; /* max memory size / PAGE_SIZE */
1711 struct snd_dma_buffer silent_page; /* silent page */ 1712 struct snd_dma_buffer silent_page; /* silent page */
1712 struct snd_dma_buffer ptb_pages; /* page table pages */ 1713 struct snd_dma_buffer ptb_pages; /* page table pages */