On Wed, 2012-10-31 at 23:46 +0100, Daniel Vetter wrote: > On Thu, Nov 01, 2012 at 12:03:39AM +0200, Imre Deak wrote: > > drm_vblank_off() requires callers to hold the event_lock. > > > > Signed-off-by: Imre Deak <imre.deak at intel.com> > > Hm, do we put this code through its paces already in flip_test by > scheduling a vblank wait in the future (a second or so), and then > disabling the display? There isn't such a test case yet, but this bug is triggered with what we have already, the 'wait-for-vblank + dpms off' test. But it might make sense to delay the vblank as you say, in case disabling takes a long time and the vblank arrives before we get to drm_vblank_off(). I can add something for that. --Imre > -Daniel > > --- > > drivers/gpu/drm/i915/intel_display.c | 15 +++++++++++++++ > > 1 file changed, 15 insertions(+) > > > > diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c > > index b453901..56f1119 100644 > > --- a/drivers/gpu/drm/i915/intel_display.c > > +++ b/drivers/gpu/drm/i915/intel_display.c > > @@ -3413,6 +3413,7 @@ static void ironlake_crtc_disable(struct drm_crtc *crtc) > > struct intel_encoder *encoder; > > int pipe = intel_crtc->pipe; > > int plane = intel_crtc->plane; > > + unsigned long flags; > > u32 reg, temp; > > > > > > @@ -3423,7 +3424,11 @@ static void ironlake_crtc_disable(struct drm_crtc *crtc) > > encoder->disable(encoder); > > > > intel_crtc_wait_for_pending_flips(crtc); > > + > > + spin_lock_irqsave(&dev->event_lock, flags); > > drm_vblank_off(dev, pipe); > > + spin_unlock_irqrestore(&dev->event_lock, flags); > > + > > intel_crtc_update_cursor(crtc, false); > > > > intel_disable_plane(dev_priv, plane, pipe); > > @@ -3495,6 +3500,7 @@ static void haswell_crtc_disable(struct drm_crtc *crtc) > > int plane = intel_crtc->plane; > > enum transcoder cpu_transcoder = intel_crtc->cpu_transcoder; > > bool is_pch_port; > > + unsigned long flags; > > > > if (!intel_crtc->active) > > return; > > @@ -3505,7 +3511,11 @@ static void haswell_crtc_disable(struct drm_crtc *crtc) > > encoder->disable(encoder); > > > > intel_crtc_wait_for_pending_flips(crtc); > > + > > + spin_lock_irqsave(&dev->event_lock, flags); > > drm_vblank_off(dev, pipe); > > + spin_unlock_irqrestore(&dev->event_lock, flags); > > + > > intel_crtc_update_cursor(crtc, false); > > > > intel_disable_plane(dev_priv, plane, pipe); > > @@ -3617,6 +3627,7 @@ static void i9xx_crtc_disable(struct drm_crtc *crtc) > > struct intel_encoder *encoder; > > int pipe = intel_crtc->pipe; > > int plane = intel_crtc->plane; > > + unsigned long flags; > > > > > > if (!intel_crtc->active) > > @@ -3627,7 +3638,11 @@ static void i9xx_crtc_disable(struct drm_crtc *crtc) > > > > /* Give the overlay scaler a chance to disable if it's on this pipe */ > > intel_crtc_wait_for_pending_flips(crtc); > > + > > + spin_lock_irqsave(&dev->event_lock, flags); > > drm_vblank_off(dev, pipe); > > + spin_unlock_irqrestore(&dev->event_lock, flags); > > + > > intel_crtc_dpms_overlay(intel_crtc, false); > > intel_crtc_update_cursor(crtc, false); > > > > -- > > 1.7.9.5 > > > > _______________________________________________ > > dri-devel mailing list > > dri-devel at lists.freedesktop.org > > http://lists.freedesktop.org/mailman/listinfo/dri-devel >
