[Intel-gfx] [PATCH v2 10/11] drm/i915: Implement async flip for ilk/snb

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

Add support for async flips on ivb/hsw. Again no need for any
workarounds and just have to deal with the interrupt bits being
shuffled around a bit.

Cc: Karthik B S <karthik.b.s at intel.com>
Cc: Vandita Kulkarni <vandita.kulkarni at intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/display/i9xx_plane.c    | 24 ++++++++++++++++++++
 drivers/gpu/drm/i915/display/intel_display.c |  3 ++-
 drivers/gpu/drm/i915/i915_irq.c              |  5 ++++
 3 files changed, 31 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/i9xx_plane.c b/drivers/gpu/drm/i915/display/i9xx_plane.c
index f75be2292caa..488ed01bb342 100644
--- a/drivers/gpu/drm/i915/display/i9xx_plane.c
+++ b/drivers/gpu/drm/i915/display/i9xx_plane.c
@@ -559,6 +559,26 @@ ivb_primary_disable_flip_done(struct intel_plane *plane)
 	spin_unlock_irq(&i915->irq_lock);
 }
 
+static void
+ilk_primary_enable_flip_done(struct intel_plane *plane)
+{
+	struct drm_i915_private *i915 = to_i915(plane->base.dev);
+
+	spin_lock_irq(&i915->irq_lock);
+	ilk_enable_display_irq(i915, DE_PLANE_FLIP_DONE(plane->i9xx_plane));
+	spin_unlock_irq(&i915->irq_lock);
+}
+
+static void
+ilk_primary_disable_flip_done(struct intel_plane *plane)
+{
+	struct drm_i915_private *i915 = to_i915(plane->base.dev);
+
+	spin_lock_irq(&i915->irq_lock);
+	ilk_disable_display_irq(i915, DE_PLANE_FLIP_DONE(plane->i9xx_plane));
+	spin_unlock_irq(&i915->irq_lock);
+}
+
 static bool i9xx_plane_get_hw_state(struct intel_plane *plane,
 				    enum pipe *pipe)
 {
@@ -781,6 +801,10 @@ intel_primary_plane_create(struct drm_i915_private *dev_priv, enum pipe pipe)
 		plane->async_flip = g4x_primary_async_flip;
 		plane->enable_flip_done = ivb_primary_enable_flip_done;
 		plane->disable_flip_done = ivb_primary_disable_flip_done;
+	} else if (IS_GEN_RANGE(dev_priv, 5, 6)) {
+		plane->async_flip = g4x_primary_async_flip;
+		plane->enable_flip_done = ilk_primary_enable_flip_done;
+		plane->disable_flip_done = ilk_primary_disable_flip_done;
 	}
 
 	if (INTEL_GEN(dev_priv) >= 5 || IS_G4X(dev_priv))
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 25da68f12df1..67add1166d5a 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -2123,7 +2123,8 @@ static unsigned int intel_linear_alignment(const struct drm_i915_private *dev_pr
 static bool has_async_flips(struct drm_i915_private *i915)
 {
 	return INTEL_GEN(i915) >= 9 || IS_BROADWELL(i915) ||
-		IS_HASWELL(i915) || IS_IVYBRIDGE(i915);
+		IS_HASWELL(i915) || IS_IVYBRIDGE(i915) ||
+		IS_GEN_RANGE(i915, 5, 6);
 }
 
 static unsigned int intel_surf_alignment(const struct drm_framebuffer *fb,
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 3518f6f23896..9e04c6b28c12 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -2029,6 +2029,9 @@ static void ilk_display_irq_handler(struct drm_i915_private *dev_priv,
 		if (de_iir & DE_PIPE_VBLANK(pipe))
 			intel_handle_vblank(dev_priv, pipe);
 
+		if (de_iir & DE_PLANE_FLIP_DONE(pipe))
+			flip_done_handler(dev_priv, pipe);
+
 		if (de_iir & DE_PIPE_FIFO_UNDERRUN(pipe))
 			intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
 
@@ -3577,6 +3580,8 @@ static void ilk_irq_postinstall(struct drm_i915_private *dev_priv)
 				DE_PIPEA_CRC_DONE | DE_POISON);
 		extra_mask = (DE_PIPEA_VBLANK | DE_PIPEB_VBLANK |
 			      DE_PIPEB_FIFO_UNDERRUN | DE_PIPEA_FIFO_UNDERRUN |
+			      DE_PLANE_FLIP_DONE(PLANE_A) |
+			      DE_PLANE_FLIP_DONE(PLANE_B) |
 			      DE_DP_A_HOTPLUG);
 	}
 
-- 
2.26.2