drm/i915: Add initial bits for VGA modesetting bringup on Sandybridge.

[safe/jmp/linux-2.6] / drivers / gpu / drm / i915 / intel_overlay.c

diff --git a/drivers/gpu/drm/i915/intel_overlay.c b/drivers/gpu/drm/i915/intel_overlay.c
index 1b50d61..d355d1d 100644 (file)
--- a/drivers/gpu/drm/i915/intel_overlay.c
+++ b/drivers/gpu/drm/i915/intel_overlay.c
@@ -172,7 +172,7 @@ struct overlay_registers {
 #define OFC_UPDATE             0x1
 
 #define OVERLAY_NONPHYSICAL(dev) (IS_G33(dev) || IS_I965G(dev))
-#define OVERLAY_EXISTS(dev) (!IS_G4X(dev) && !IS_IRONLAKE(dev))
+#define OVERLAY_EXISTS(dev) (!IS_G4X(dev) && !IS_IRONLAKE(dev) && !IS_GEN6(dev))
 
 
 static struct overlay_registers *intel_overlay_map_regs_atomic(struct intel_overlay *overlay)
@@ -199,16 +199,11 @@ static struct overlay_registers *intel_overlay_map_regs_atomic(struct intel_over
 
 static void intel_overlay_unmap_regs_atomic(struct intel_overlay *overlay)
 {
-       struct drm_device *dev = overlay->dev;
-        drm_i915_private_t *dev_priv = dev->dev_private;
-
        if (OVERLAY_NONPHYSICAL(overlay->dev))
                io_mapping_unmap_atomic(overlay->virt_addr);
 
        overlay->virt_addr = NULL;
 
-       I915_READ(OVADD); /* flush wc cashes */
-
        return;
 }
 
@@ -225,9 +220,7 @@ static int intel_overlay_on(struct intel_overlay *overlay)
        overlay->active = 1;
        overlay->hw_wedged = NEEDS_WAIT_FOR_FLIP;
 
-       BEGIN_LP_RING(6);
-       OUT_RING(MI_FLUSH);
-       OUT_RING(MI_NOOP);
+       BEGIN_LP_RING(4);
        OUT_RING(MI_OVERLAY_FLIP | MI_OVERLAY_ON);
        OUT_RING(overlay->flip_addr | OFC_UPDATE);
        OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP);
@@ -267,9 +260,7 @@ static void intel_overlay_continue(struct intel_overlay *overlay,
        if (tmp & (1 << 17))
                DRM_DEBUG("overlay underrun, DOVSTA: %x\n", tmp);
 
-       BEGIN_LP_RING(4);
-       OUT_RING(MI_FLUSH);
-       OUT_RING(MI_NOOP);
+       BEGIN_LP_RING(2);
        OUT_RING(MI_OVERLAY_FLIP | MI_OVERLAY_CONTINUE);
        OUT_RING(flip_addr);
         ADVANCE_LP_RING();
@@ -338,9 +329,7 @@ static int intel_overlay_off(struct intel_overlay *overlay)
        /* wait for overlay to go idle */
        overlay->hw_wedged = SWITCH_OFF_STAGE_1;
 
-       BEGIN_LP_RING(6);
-       OUT_RING(MI_FLUSH);
-       OUT_RING(MI_NOOP);
+       BEGIN_LP_RING(4);
        OUT_RING(MI_OVERLAY_FLIP | MI_OVERLAY_CONTINUE);
        OUT_RING(flip_addr);
         OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP);
@@ -358,9 +347,7 @@ static int intel_overlay_off(struct intel_overlay *overlay)
        /* turn overlay off */
        overlay->hw_wedged = SWITCH_OFF_STAGE_2;
 
-       BEGIN_LP_RING(6);
-        OUT_RING(MI_FLUSH);
-        OUT_RING(MI_NOOP);
+       BEGIN_LP_RING(4);
         OUT_RING(MI_OVERLAY_FLIP | MI_OVERLAY_OFF);
        OUT_RING(flip_addr);
         OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP);
@@ -435,9 +422,7 @@ int intel_overlay_recover_from_interrupt(struct intel_overlay *overlay,
 
                        overlay->hw_wedged = SWITCH_OFF_STAGE_2;
 
-                       BEGIN_LP_RING(6);
-                       OUT_RING(MI_FLUSH);
-                       OUT_RING(MI_NOOP);
+                       BEGIN_LP_RING(4);
                        OUT_RING(MI_OVERLAY_FLIP | MI_OVERLAY_OFF);
                        OUT_RING(flip_addr);
                        OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP);