drm/i915: Implement async flips for vlv/chv

Add support for async flips on vlv/chv. Unlike all the other
platforms vlv/chv do not use the async flip bit in DSPCNTR and
instead we select between async vs. sync flips based on the
surface address register. The normal DSPSURF generates sync
flips DSPADDR_VLV generates async flips. And as usual the
interrupt bits are different from the other platforms.

Cc: Karthik B S <karthik.b.s@intel.com>
Cc: Vandita Kulkarni <vandita.kulkarni@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210111163711.12913-12-ville.syrjala@linux.intel.com
Reviewed-by: Karthik B S <karthik.b.s@intel.com>

1 files changed, 46 insertions, 3 deletions

diff --git a/drivers/gpu/drm/i915/display/i9xx_plane.c b/drivers/gpu/drm/i915/display/i9xx_plane.c
index 488ed01bb342..d30374df67f0 100644
--- a/drivers/gpu/drm/i915/display/i9xx_plane.c
+++ b/drivers/gpu/drm/i915/display/i9xx_plane.c
@@ -518,6 +518,23 @@ g4x_primary_async_flip(struct intel_plane *plane,
 }
 
 static void
+vlv_primary_async_flip(struct intel_plane *plane,
+		       const struct intel_crtc_state *crtc_state,
+		       const struct intel_plane_state *plane_state,
+		       bool async_flip)
+{
+	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+	u32 dspaddr_offset = plane_state->color_plane[0].offset;
+	enum i9xx_plane_id i9xx_plane = plane->i9xx_plane;
+	unsigned long irqflags;
+
+	spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
+	intel_de_write_fw(dev_priv, DSPADDR_VLV(i9xx_plane),
+			  intel_plane_ggtt_offset(plane_state) + dspaddr_offset);
+	spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
+}
+
+static void
 bdw_primary_enable_flip_done(struct intel_plane *plane)
 {
 	struct drm_i915_private *i915 = to_i915(plane->base.dev);
@@ -579,6 +596,28 @@ ilk_primary_disable_flip_done(struct intel_plane *plane)
 	spin_unlock_irq(&i915->irq_lock);
 }
 
+static void
+vlv_primary_enable_flip_done(struct intel_plane *plane)
+{
+	struct drm_i915_private *i915 = to_i915(plane->base.dev);
+	enum pipe pipe = plane->pipe;
+
+	spin_lock_irq(&i915->irq_lock);
+	i915_enable_pipestat(i915, pipe, PLANE_FLIP_DONE_INT_STATUS_VLV);
+	spin_unlock_irq(&i915->irq_lock);
+}
+
+static void
+vlv_primary_disable_flip_done(struct intel_plane *plane)
+{
+	struct drm_i915_private *i915 = to_i915(plane->base.dev);
+	enum pipe pipe = plane->pipe;
+
+	spin_lock_irq(&i915->irq_lock);
+	i915_disable_pipestat(i915, pipe, PLANE_FLIP_DONE_INT_STATUS_VLV);
+	spin_unlock_irq(&i915->irq_lock);
+}
+
 static bool i9xx_plane_get_hw_state(struct intel_plane *plane,
 				    enum pipe *pipe)
 {
@@ -792,16 +831,20 @@ intel_primary_plane_create(struct drm_i915_private *dev_priv, enum pipe pipe)
 	plane->get_hw_state = i9xx_plane_get_hw_state;
 	plane->check_plane = i9xx_plane_check;
 
-	if (IS_BROADWELL(dev_priv)) {
+	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
+		plane->async_flip = vlv_primary_async_flip;
+		plane->enable_flip_done = vlv_primary_enable_flip_done;
+		plane->disable_flip_done = vlv_primary_disable_flip_done;
+	} else if (IS_BROADWELL(dev_priv)) {
 		plane->need_async_flip_disable_wa = true;
 		plane->async_flip = g4x_primary_async_flip;
 		plane->enable_flip_done = bdw_primary_enable_flip_done;
 		plane->disable_flip_done = bdw_primary_disable_flip_done;
-	} else if (IS_HASWELL(dev_priv) || IS_IVYBRIDGE(dev_priv)) {
+	} else if (INTEL_GEN(dev_priv) >= 7) {
 		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)) {
+	} else if (INTEL_GEN(dev_priv) >= 5) {
 		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;