[alsa-devel] [PATCH] drm/i915: Enable VLV audio chicken bit for LPE audio

[Takashi Iwai]

On Thu, 02 Feb 2017 18:02:15 +0100,
Takashi Iwai wrote:
> 
> The audio chicken bit (register offset 0x62f38) seems required to make
> DP audio working on some machines.  At least, on Dell Wyse 3040, I
> failed to get the audio unless this bit is set once.
> 
> Strangely, the bit seems necessary only once, and it persists after
> that, even some power-off cycles.  The register is supposedly
> write-only, so it's no evidence whether the bit keeps effect
> persistently.  But, judging from the experiment, it looks enough to
> set it up once at the device initialization.
> 
> The patch is basically a cut from the original patch by Pierre-Louis
> Bossart.
> 
> Cc: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>
> Signed-off-by: Takashi Iwai <tiwai at suse.de>

Sorry, this one is just a resend by mistake (I forgot to clean up
while sending the other patch series).  Please disregard.


Takashi