On Tue, 14 Jun 2011 12:34:54 -0700
Jesse Barnes <jbar...@virtuousgeek.org> wrote:
> Use the blit ring for submitting flips since the render ring doesn't
> generate flip complete interrupts.
>
> Signed-off-by: Jesse Barnes <jbar...@virtuousgeek.org>
> ---
> drivers/gpu/drm/i915/intel_display.c | 26 ++++++++++++++++++++++++++
> 1 files changed, 26 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_display.c
> b/drivers/gpu/drm/i915/intel_display.c
> index 0fb0b0c..d40fcd0 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -6379,6 +6379,29 @@ out:
> return ret;
> }
>
> +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_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;
> +}
Oh and suggestions on how to track the BO properly through the BLT ring
appreciated... I think that's the last missing piece.
--
Jesse Barnes, Intel Open Source Technology Center
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