[alsa-devel] [PATCH] ALSA: hda - using POS_FIX_LPIB on Broadwell HDMI Audio

[Takashi Iwai]

At Thu,  8 May 2014 02:03:24 +0800,
libin.yang at intel.com wrote:
> 
> From: Libin Yang <libin.yang at intel.com>
> 
> Audio stream is not continuous if using position buffer on Broadwell
> HDMI audio. Sound is clipped.
> Fix this issue by using POS_FIX_LPIB.

That's odd.  The recent Intel hardware has a wallclock support, so the
position should be corrected by that.

In which situation did the problem happen?  Did it happen with every
application and any period/buffer setup?


Takashi

> 
> Signed-off-by: Libin Yang <libin.yang at intel.com>
> ---
>  sound/pci/hda/hda_intel.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
> index b540ad7..9cd40c6 100644
> --- a/sound/pci/hda/hda_intel.c
> +++ b/sound/pci/hda/hda_intel.c
> @@ -993,6 +993,7 @@ static struct snd_pci_quirk position_fix_list[] = {
>  	SND_PCI_QUIRK(0x1565, 0x8218, "Biostar Microtech", POS_FIX_LPIB),
>  	SND_PCI_QUIRK(0x1849, 0x0888, "775Dual-VSTA", POS_FIX_LPIB),
>  	SND_PCI_QUIRK(0x8086, 0x2503, "DG965OT AAD63733-203", POS_FIX_LPIB),
> +	SND_PCI_QUIRK(0x8086, 0x2010, "Broadwell HDMI audio", POS_FIX_LPIB),
>  	{}
>  };
>  
> -- 
> 1.8.3.2
>