drm/i915: call drm_handle_vblank before finish_page_flip

... since finish_page_flip needs the vblank timestamp generated
in drm_handle_vblank. Somehow all the gmch platforms get it right,
but all the pch platform irq handlers get is wrong. Hooray for copy&
pasting!

Currently this gets papered over by a gross hack in finish_page_flip.
A second patch will remove that.

Note that without this, the new timestamp sanity checks in flip_test
occasionally get tripped up, hence the cc: stable tag.

Cc: stable@vger.kernel.org
Reviewed-by: mario.kleiner@tuebingen.mpg.de
Tested-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index d7f0066..1fc2489 100644 (file)
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -698,12 +698,12 @@ static irqreturn_t ivybridge_irq_handler(DRM_IRQ_ARGS)
                        intel_opregion_gse_intr(dev);
 
                for (i = 0; i < 3; i++) {
+                       if (de_iir & (DE_PIPEA_VBLANK_IVB << (5 * i)))
+                               drm_handle_vblank(dev, i);
                        if (de_iir & (DE_PLANEA_FLIP_DONE_IVB << (5 * i))) {
                                intel_prepare_page_flip(dev, i);
                                intel_finish_page_flip_plane(dev, i);
                        }
-                       if (de_iir & (DE_PIPEA_VBLANK_IVB << (5 * i)))
-                               drm_handle_vblank(dev, i);
                }
 
                /* check event from PCH */
@@ -785,6 +785,12 @@ static irqreturn_t ironlake_irq_handler(DRM_IRQ_ARGS)
        if (de_iir & DE_GSE)
                intel_opregion_gse_intr(dev);
 
+       if (de_iir & DE_PIPEA_VBLANK)
+               drm_handle_vblank(dev, 0);
+
+       if (de_iir & DE_PIPEB_VBLANK)
+               drm_handle_vblank(dev, 1);
+
        if (de_iir & DE_PLANEA_FLIP_DONE) {
                intel_prepare_page_flip(dev, 0);
                intel_finish_page_flip_plane(dev, 0);
@@ -795,12 +801,6 @@ static irqreturn_t ironlake_irq_handler(DRM_IRQ_ARGS)
                intel_finish_page_flip_plane(dev, 1);
        }
 
-       if (de_iir & DE_PIPEA_VBLANK)
-               drm_handle_vblank(dev, 0);
-
-       if (de_iir & DE_PIPEB_VBLANK)
-               drm_handle_vblank(dev, 1);
-
        /* check event from PCH */
        if (de_iir & DE_PCH_EVENT) {
                if (pch_iir & hotplug_mask)