[Bug 65497] Warnings after resume in i915

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=65497

--- Comment #7 from Zoltán Böszörményi <zboszor at pr.hu> ---
(In reply to comment #5)
> For the time out warning, can you please check whether it goes away if you
> increase the timeout:
> 
> diff --git a/drivers/gpu/drm/i915/intel_lvds.c
> b/drivers/gpu/drm/i915/intel_lvds.c
> index 10c3d56..7e0ee01 100644
> --- a/drivers/gpu/drm/i915/intel_lvds.c
> +++ b/drivers/gpu/drm/i915/intel_lvds.c
> @@ -200,7 +200,7 @@ static void intel_enable_lvds(struct intel_encoder
> *encoder)
>  
>         I915_WRITE(ctl_reg, I915_READ(ctl_reg) | POWER_TARGET_ON);
>         POSTING_READ(lvds_encoder->reg);
> -       if (wait_for((I915_READ(stat_reg) & PP_ON) != 0, 1000))
> +       if (wait_for((I915_READ(stat_reg) & PP_ON) != 0, 2000))
>                 DRM_ERROR("timed out waiting for panel to power on\n");
>  
>         intel_panel_enable_backlight(dev, intel_crtc->pipe);
> 
> If that works then most likely the firmware on your board sets up a
> ridiculously high panel power on delay.

It seems to be the case, since this error doesn't appear with the patch
anymore.

> For the WARNs we need dmesg with drm.debug=0xe added to your kernel
> commandline. They are self-checks of our modeset code to make sure the hw
> state agrees with our sw tracking. Usually they do indicate real issues, but
> sometimes there's also a tiny bug in the checker itself.

The new dmesg will be attached in a minute.

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