[PATCH] drm/radeon: avoid turning off spread spectrum for used pll

[Alex Deucher]

On Fri, Aug 17, 2012 at 2:54 PM, Alex Deucher <alexdeucher at gmail.com> wrote:
> On Fri, Aug 17, 2012 at 2:40 PM,  <j.glisse at gmail.com> wrote:
>> From: Jerome Glisse <jglisse at redhat.com>
>>
>> If spread spectrum is enabled and in use for a given pll we
>> should not turn it off as it will lead to turning off display
>> for crtc that use the pll (this behavior was observed on chelsea
>> edp).
>>
>> Signed-off-by: Jerome Glisse <jglisse at redhat.com>
>
> Looks good.  I think an alternative would be to just always enable SS
> for DP/eDP rather than checking the DPCD since all DP connections run
> on the same PLL.

On discrete cards anyway.  APUs are a little different, but the same idea holds.

Alex