[PATCH v2 4/9] drm/i915: Use LRI based FBC render tracking for ILK

[ville.syrjala@xxxxxxxxxxxxxxx]

From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>

ILK should work pretty much the same as SNB, except it
doesn't have the blitter, so we only care about render tracking.

v2: Rebased against earlier changes

Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
 drivers/gpu/drm/i915/i915_reg.h         | 2 +-
 drivers/gpu/drm/i915/intel_pm.c         | 2 --
 drivers/gpu/drm/i915/intel_ringbuffer.c | 9 ++++++---
 3 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index f2104f5..6de26eb 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -1091,7 +1091,7 @@
 #define ILK_DPFC_CHICKEN	0x43224
 #define ILK_FBC_RT_BASE		0x2128
 #define   ILK_FBC_RT_VALID	(1<<0)
-#define   SNB_FBC_FRONT_BUFFER	(1<<1)
+#define   ILK_FBC_FRONT_BUFFER	(1<<1)
 
 #define ILK_DISPLAY_CHICKEN1	0x42000
 #define   ILK_FBCQ_DIS		(1<<22)
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 059245e..d0f554e 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -214,8 +214,6 @@ static void ironlake_enable_fbc(struct drm_crtc *crtc,
 		   (stall_watermark << DPFC_RECOMP_STALL_WM_SHIFT) |
 		   (interval << DPFC_RECOMP_TIMER_COUNT_SHIFT));
 	I915_WRITE(ILK_DPFC_FENCE_YOFF, crtc->y);
-	if (IS_GEN5(dev))
-		I915_WRITE(ILK_FBC_RT_BASE, i915_gem_obj_ggtt_offset(obj) | ILK_FBC_RT_VALID);
 	/* enable it... */
 	I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN);
 
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 426d868..c0db05e 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -51,7 +51,7 @@ void __intel_ring_advance(struct intel_ring_buffer *ring)
 	ring->write_tail(ring, ring->tail);
 }
 
-static int gen6_render_fbc_tracking(struct intel_ring_buffer *ring)
+static int gen5_render_fbc_tracking(struct intel_ring_buffer *ring)
 {
 	int ret;
 
@@ -67,7 +67,7 @@ static int gen6_render_fbc_tracking(struct intel_ring_buffer *ring)
 	intel_ring_emit(ring, ILK_FBC_RT_BASE);
 	if (ring->fbc_address != -1)
 		intel_ring_emit(ring, ring->fbc_address |
-				SNB_FBC_FRONT_BUFFER | ILK_FBC_RT_VALID);
+				ILK_FBC_FRONT_BUFFER | ILK_FBC_RT_VALID);
 	else
 		intel_ring_emit(ring, 0);
 	intel_ring_advance(ring);
@@ -183,6 +183,9 @@ gen4_render_ring_flush(struct intel_ring_buffer *ring,
 	intel_ring_emit(ring, MI_NOOP);
 	intel_ring_advance(ring);
 
+	if (invalidate_domains && IS_GEN5(dev))
+		return gen5_render_fbc_tracking(ring);
+
 	return 0;
 }
 
@@ -308,7 +311,7 @@ gen6_render_ring_flush(struct intel_ring_buffer *ring,
 	intel_ring_advance(ring);
 
 	if (invalidate_domains)
-		return gen6_render_fbc_tracking(ring);
+		return gen5_render_fbc_tracking(ring);
 
 	return 0;
 }
-- 
1.8.3.2

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