drm/i915: Kill the 830 MI_OVERLAY_OFF workaround

Now that we're disabling L2 clock gating MI_OVERLAY_OFF actually works
on 830, so let's use it.

v2: Nuke the unused dev_priv variable

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20161222195222.9618-1-ville.syrjala@linux.intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>

diff --git a/drivers/gpu/drm/i915/intel_overlay.c b/drivers/gpu/drm/i915/intel_overlay.c
index f59d183..c953623 100644 (file)
--- a/drivers/gpu/drm/i915/intel_overlay.c
+++ b/drivers/gpu/drm/i915/intel_overlay.c
@@ -407,7 +407,6 @@ static void intel_overlay_off_tail(struct i915_gem_active *active,
 /* overlay needs to be disabled in OCMD reg */
 static int intel_overlay_off(struct intel_overlay *overlay)
 {
-       struct drm_i915_private *dev_priv = overlay->i915;
        struct drm_i915_gem_request *req;
        struct intel_ring *ring;
        u32 flip_addr = overlay->flip_addr;
@@ -432,23 +431,17 @@ static int intel_overlay_off(struct intel_overlay *overlay)
        }
 
        ring = req->ring;
+
        /* wait for overlay to go idle */
        intel_ring_emit(ring, MI_OVERLAY_FLIP | MI_OVERLAY_CONTINUE);
        intel_ring_emit(ring, flip_addr);
        intel_ring_emit(ring, MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP);
+
        /* turn overlay off */
-       if (IS_I830(dev_priv)) {
-               /* Workaround: Don't disable the overlay fully, since otherwise
-                * it dies on the next OVERLAY_ON cmd. */
-               intel_ring_emit(ring, MI_NOOP);
-               intel_ring_emit(ring, MI_NOOP);
-               intel_ring_emit(ring, MI_NOOP);
-       } else {
-               intel_ring_emit(ring, MI_OVERLAY_FLIP | MI_OVERLAY_OFF);
-               intel_ring_emit(ring, flip_addr);
-               intel_ring_emit(ring,
-                               MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP);
-       }
+       intel_ring_emit(ring, MI_OVERLAY_FLIP | MI_OVERLAY_OFF);
+       intel_ring_emit(ring, flip_addr);
+       intel_ring_emit(ring, MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP);
+
        intel_ring_advance(ring);
 
        intel_overlay_flip_prepare(overlay, NULL);