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SubjectRe: Intel Haswell kernel warning (3.11.2)
On Sun, Sep 29, 2013 at 10:17:34AM -0400, Wakko Warner wrote:
> Wakko Warner wrote:
> > Please keep me in CC.
> >
> > I receive a warning in drivers/gpu/drm/i915/intel_display.c:3869. This
> > happens when I'm on a console, the screen has gone into power save and I
> > press a key to wake it up.
> >
> > This doesn't happen when I'm in X.
> >
> > Kernel is Vanilla 3.11.2.

Try,

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index bd3e115..dacde4e 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4043,8 +4043,6 @@ static void intel_connector_check_state(struct intel_connector *connector)
* consider. */
void intel_connector_dpms(struct drm_connector *connector, int mode)
{
- struct intel_encoder *encoder = intel_attached_encoder(connector);
-
/* All the simple cases only support two dpms states. */
if (mode != DRM_MODE_DPMS_ON)
mode = DRM_MODE_DPMS_OFF;
@@ -4055,10 +4053,8 @@ void intel_connector_dpms(struct drm_connector *connector, int mode)
connector->dpms = mode;

/* Only need to change hw state when actually enabled */
- if (encoder->base.crtc)
- intel_encoder_dpms(encoder, mode);
- else
- WARN_ON(encoder->connectors_active != false);
+ if (connector->encoder)
+ intel_encoder_dpms(to_intel_encoder(connector->encoder), mode);

intel_modeset_check_state(connector->dev);
}
--
Chris Wilson, Intel Open Source Technology Centre


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