Disable DC states before enabling vblank interrupts and conversely
enable DC states after disabling. Since the frame counter may have got
reset between disabling and enabling, use drm_crtc_vblank_restore() to
compute the missed vblanks.
Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_irq.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 3517c6548e2c..88b4ceac55d0 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -2963,6 +2963,11 @@ static int gen8_enable_vblank(struct drm_device *dev, unsigned int pipe)
{
struct drm_i915_private *dev_priv = to_i915(dev);
unsigned long irqflags;
+ bool needs_restore = false;
+
+ intel_display_power_vblank_get(dev_priv, &needs_restore);
+ if (needs_restore)
+ drm_crtc_vblank_restore(dev, pipe);
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
bdw_enable_pipe_irq(dev_priv, pipe, GEN8_PIPE_VBLANK);
@@ -3015,6 +3020,7 @@ static void gen8_disable_vblank(struct drm_device *dev, unsigned int pipe)
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
bdw_disable_pipe_irq(dev_priv, pipe, GEN8_PIPE_VBLANK);
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
+ intel_display_power_vblank_put(dev_priv);
}
static void ibx_irq_reset(struct drm_i915_private *dev_priv)
--
2.11.0
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