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authorJesse Barnes <jbarnes@virtuousgeek.org>2011-06-16 12:18:54 -0700
committerKeith Packard <keithp@keithp.com>2011-06-26 19:11:22 -0700
commit7c9017e5b77118439952fe8dc22809bae4fae4b6 (patch)
treeefcb66be2ab7ccefcff8f9e7bea048cba352d379 /drivers/gpu
parent8c9f3aaf8e174ca914889ab7a916586f8fd1e641 (diff)
drm/i915: add Ivy Bridge page flip support
Use the blit ring for submitting flips since the render ring doesn't generate flip complete interrupts. Fixes bugs: https://bugs.freedesktop.org/show_bug.cgi?id=38362 https://bugs.freedesktop.org/show_bug.cgi?id=38392 https://bugs.freedesktop.org/show_bug.cgi?id=38393 Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Reviewed-by: Kenneth Graunke <kenneth@whitecape.org> Reviewed-by: Ben Widawsky <ben@bwidawsk.net> Tested-by: Jian J Zhao <jian.j.zhao@intel.com> Signed-off-by: Keith Packard <keithp@keithp.com>
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/i915/intel_display.c36
1 files changed, 36 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 0f4ed2a575a..21b6f93fe91 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6411,6 +6411,39 @@ out:
return ret;
}
+/*
+ * On gen7 we currently use the blit ring because (in early silicon at least)
+ * the render ring doesn't give us interrpts for page flip completion, which
+ * means clients will hang after the first flip is queued. Fortunately the
+ * blit ring generates interrupts properly, so use it instead.
+ */
+static int intel_gen7_queue_flip(struct drm_device *dev,
+ struct drm_crtc *crtc,
+ struct drm_framebuffer *fb,
+ struct drm_i915_gem_object *obj)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+ struct intel_ring_buffer *ring = &dev_priv->ring[BCS];
+ int ret;
+
+ ret = intel_pin_and_fence_fb_obj(dev, obj, ring);
+ if (ret)
+ goto out;
+
+ ret = intel_ring_begin(ring, 4);
+ if (ret)
+ goto out;
+
+ intel_ring_emit(ring, MI_DISPLAY_FLIP_I915 | (intel_crtc->plane << 19));
+ intel_ring_emit(ring, (fb->pitch | obj->tiling_mode));
+ intel_ring_emit(ring, (obj->gtt_offset));
+ intel_ring_emit(ring, (MI_NOOP));
+ intel_ring_advance(ring);
+out:
+ return ret;
+}
+
static int intel_default_queue_flip(struct drm_device *dev,
struct drm_crtc *crtc,
struct drm_framebuffer *fb,
@@ -7758,6 +7791,9 @@ static void intel_init_display(struct drm_device *dev)
case 6:
dev_priv->display.queue_flip = intel_gen6_queue_flip;
break;
+ case 7:
+ dev_priv->display.queue_flip = intel_gen7_queue_flip;
+ break;
}
}