[Bug 65497] Warnings after resume in i915

[bugzilla-daemon at freedesktop.org]

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

Daniel Vetter <daniel at ffwll.ch> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |NEEDINFO

--- Comment #5 from Daniel Vetter <daniel at ffwll.ch> ---
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.

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.

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