[Intel-gfx] [PATCH] drm/i915: mark display port DPMS state as ON when enabling output

Chris Wilson chris at chris-wilson.co.uk
Sun Oct 3 14:05:13 PDT 2010

On Sun,  3 Oct 2010 13:33:49 -0700, Keith Packard <keithp at keithp.com> wrote:
> The display port DPMS state is tracked internally in the display port
> driver so that when a hotplug event comes along, the driver can know
> whether to try retraining the link. This doesn't work well if the
> driver never sets the DPMS state to ON when the output is enabled.

It appears that all users (crtc and encoders) are tracking dpms_mode, in
one form or another. Should we move this to core?

Is there any hardware that requires notification even when there is no

Chris Wilson, Intel Open Source Technology Centre

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