On Mon, May 23, 2016 at 03:56:36PM -0400, Lyude wrote:
> Thanks to Ville Syrjälä for pointing me towards the cause of this issue.
>
> Unfortunately one of the sideaffects of having the refclk for a DPLL set
> to SSC is that as long as it's set to SSC, the GPU will prevent us from
> powering down
Huh⦠so I'm going to have to take back what I said before about this. On
further
observation, it looks like the "Don't disable SSC source if it's in use" patch
actually got rid of the underruns entirely, with or without the wait for a
vblank here.
On Tue, 2016-05-24 at 16:14 +0300, Ville Syrjä
Thanks to Ville Syrjälä for pointing me towards the cause of this issue.
Unfortunately one of the sideaffects of having the refclk for a DPLL set
to SSC is that as long as it's set to SSC, the GPU will prevent us from
powering down any of the pipes or transcoders using it. A couple of
BIOSes ena
