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

["Lin, Mengdong" <mengdong.lin@intel.com>]

> -----Original Message-----
> From: Takashi Iwai [mailto:tiwai@suse.de]
> Sent: Tuesday, May 13, 2014 3:20 PM

> It can be just simple like the patch below.  This is rather a tentative
> workaround.  If the hardware (or the corresponding part in the graphics driver)
> is fixed, we can get rid of it easily.  So, just keep the change as small and
> simple as possible.
> 
> 
> Takashi
> 
> ---
> diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c index
> b540ad71eb0d..2c54629d62d1 100644
> --- a/sound/pci/hda/hda_intel.c
> +++ b/sound/pci/hda/hda_intel.c
> @@ -1367,6 +1367,12 @@ static int azx_first_init(struct azx *chip)
>  	/* initialize streams */
>  	azx_init_stream(chip);
> 
> +	/* workaround for Broadwell HDMI: the first stream is broken,
> +	 * so mask it by keeping it as if opened
> +	 */
> +	if (pci->vendor == 0x8086 && pci->device == 0x160c)
> +		chip->azx_dev[0].opened = 1;
> +
>  	/* initialize chip */
>  	azx_init_pci(chip);
>  	azx_init_chip(chip, (probe_only[dev] & 2) == 0);


Hi Takashi,

I revised the patch as you suggested. Hope we'll have a better solution for Broadwell soon.

Thanks
Mengdong