From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> As the watermark registers aren't double bufferd, clearing the watermarks immediately after writing the sprite registers can be hazardous. Until we have something better, add a wait for vblank between the two steps to make sure the sprite no longer needs the watermark levels before we clear them. Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> --- drivers/gpu/drm/i915/intel_sprite.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c index a872129..fe4de89 100644 --- a/drivers/gpu/drm/i915/intel_sprite.c +++ b/drivers/gpu/drm/i915/intel_sprite.c @@ -336,6 +336,12 @@ ivb_disable_plane(struct drm_plane *plane, struct drm_crtc *crtc) I915_MODIFY_DISPBASE(SPRSURF(pipe), 0); POSTING_READ(SPRSURF(pipe)); + /* + * Avoid underruns when disabling the sprite. + * FIXME remove once watermark updates are done properly. + */ + intel_wait_for_vblank(dev, pipe); + intel_update_sprite_watermarks(plane, crtc, 0, 0, false, false); } @@ -503,6 +509,12 @@ ilk_disable_plane(struct drm_plane *plane, struct drm_crtc *crtc) I915_MODIFY_DISPBASE(DVSSURF(pipe), 0); POSTING_READ(DVSSURF(pipe)); + /* + * Avoid underruns when disabling the sprite. + * FIXME remove once watermark updates are done properly. + */ + intel_wait_for_vblank(dev, pipe); + intel_update_sprite_watermarks(plane, crtc, 0, 0, false, false); } -- 1.8.3.2 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
