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.
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandi...@intel.com>
---
drivers/gpu/drm/i915/i915_irq.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 7cac07db89b9..c595b934e2dc 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -2964,6 +2964,9 @@ static int gen8_enable_vblank(struct drm_device *dev,
unsigned int pipe)
struct drm_i915_private *dev_priv = to_i915(dev);
unsigned long irqflags;
+ if (intel_display_power_vblank_get(dev_priv))
+ drm_crtc_vblank_restore(dev, pipe);
+
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
bdw_enable_pipe_irq(dev_priv, pipe, GEN8_PIPE_VBLANK);
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
@@ -3015,6 +3018,7 @@ 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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