Re: [PATCH v4 19/27] drm/i915: Read hw state into an atomic state struct, v2.

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On 06/01/2015 11:50 AM, Maarten Lankhorst wrote:
From: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@xxxxxxxxx>

To make this work we load the new hardware state into the
atomic_state, then swap it with the sw state.

This lets us change the force restore path in setup_hw_state()
to use a single call to intel_mode_set() to restore all the
previous state.

As a nice bonus this kills off encoder->new_encoder,
connector->new_enabled and crtc->new_enabled. They were used only
to restore the state after a modeset.

Changes since v1:
- Make sure all possible planes are added with their crtc set,
   so they will be turned off on first modeset.

Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@xxxxxxxxx>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>

This breaks display for me, which is eDP on SKL. At least bisect points to it. A lot of these in the logs:

*ERROR* mismatch in dp_m_n.link_m (expected 701594 or 0, found 350797)

And the display does not light up.

Regards,

Tvrtko
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