For whatever reason, MI_DISPLAY_FLIP fails to change tiling mode on Baytrail, so just use CPU driven mmio flips instead. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=76176 Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> --- drivers/gpu/drm/i915/intel_display.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 103d8f450e74..8a9695697380 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -9453,6 +9453,9 @@ static bool use_mmio_flip(struct intel_engine_cs *ring, * So using MMIO flips there would disrupt this mechanism. */ + if (ring == NULL) + return true; + if (INTEL_INFO(ring->dev)->gen < 5) return false; @@ -9747,6 +9750,9 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc, if (IS_VALLEYVIEW(dev)) { ring = &dev_priv->ring[BCS]; + if (obj->tiling_mode != work->old_fb_obj->tiling_mode) + /* vlv: DISPLAY_FLIP fails to change tiling */ + ring = NULL; } else if (IS_IVYBRIDGE(dev)) { ring = &dev_priv->ring[BCS]; } else if (INTEL_INFO(dev)->gen >= 7) { -- 2.0.1 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
