drm/i915/overlay: Refactor do_wait_request()

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_overlay.c b/drivers/gpu/drm/i915/intel_overlay.c
index 7fbc0f3..7055c46 100644 (file)
--- a/drivers/gpu/drm/i915/intel_overlay.c
+++ b/drivers/gpu/drm/i915/intel_overlay.c
@@ -241,34 +241,24 @@ static void intel_overlay_unmap_regs(struct intel_overlay *overlay)
        return;
 }
 
-/* overlay needs to be disable in OCMD reg */
-static int intel_overlay_on(struct intel_overlay *overlay)
+static int intel_overlay_do_wait_request(struct intel_overlay *overlay,
+                                        bool interruptible,
+                                        int stage)
 {
        struct drm_device *dev = overlay->dev;
-       int ret;
        drm_i915_private_t *dev_priv = dev->dev_private;
-
-       BUG_ON(overlay->active);
-
-       overlay->active = 1;
-       overlay->hw_wedged = NEEDS_WAIT_FOR_FLIP;
-
-       BEGIN_LP_RING(4);
-       OUT_RING(MI_OVERLAY_FLIP | MI_OVERLAY_ON);
-       OUT_RING(overlay->flip_addr | OFC_UPDATE);
-       OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP);
-       OUT_RING(MI_NOOP);
-       ADVANCE_LP_RING();
+       int ret;
 
        overlay->last_flip_req =
                i915_add_request(dev, NULL, &dev_priv->render_ring);
        if (overlay->last_flip_req == 0)
                return -ENOMEM;
 
+       overlay->hw_wedged = stage;
        ret = i915_do_wait_request(dev,
                                   overlay->last_flip_req, true,
                                   &dev_priv->render_ring);
-       if (ret != 0)
+       if (ret)
                return ret;
 
        overlay->hw_wedged = 0;
@@ -276,6 +266,26 @@ static int intel_overlay_on(struct intel_overlay *overlay)
        return 0;
 }
 
+/* overlay needs to be disable in OCMD reg */
+static int intel_overlay_on(struct intel_overlay *overlay)
+{
+       struct drm_device *dev = overlay->dev;
+
+       BUG_ON(overlay->active);
+
+       overlay->active = 1;
+
+       BEGIN_LP_RING(4);
+       OUT_RING(MI_OVERLAY_FLIP | MI_OVERLAY_ON);
+       OUT_RING(overlay->flip_addr | OFC_UPDATE);
+       OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP);
+       OUT_RING(MI_NOOP);
+       ADVANCE_LP_RING();
+
+       return intel_overlay_do_wait_request(overlay, true,
+                                            NEEDS_WAIT_FOR_FLIP);
+}
+
 /* overlay needs to be enabled in OCMD reg */
 static void intel_overlay_continue(struct intel_overlay *overlay,
                                   bool load_polyphase_filter)
@@ -326,27 +336,12 @@ static int intel_overlay_wait_flip(struct intel_overlay *overlay)
        }
 
        /* synchronous slowpath */
-       overlay->hw_wedged = RELEASE_OLD_VID;
-
        BEGIN_LP_RING(2);
        OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP);
        OUT_RING(MI_NOOP);
        ADVANCE_LP_RING();
 
-       overlay->last_flip_req =
-               i915_add_request(dev, NULL, &dev_priv->render_ring);
-       if (overlay->last_flip_req == 0)
-               return -ENOMEM;
-
-       ret = i915_do_wait_request(dev,
-                                  overlay->last_flip_req, true,
-                                  &dev_priv->render_ring);
-       if (ret != 0)
-               return ret;
-
-       overlay->hw_wedged = 0;
-       overlay->last_flip_req = 0;
-       return 0;
+       return intel_overlay_do_wait_request(overlay, true, RELEASE_OLD_VID);
 }
 
 /* overlay needs to be disabled in OCMD reg */
@@ -354,7 +349,6 @@ static int intel_overlay_off(struct intel_overlay *overlay)
 {
        u32 flip_addr = overlay->flip_addr;
        struct drm_device *dev = overlay->dev;
-       drm_i915_private_t *dev_priv = dev->dev_private;
        int ret;
 
        BUG_ON(!overlay->active);
@@ -366,8 +360,6 @@ static int intel_overlay_off(struct intel_overlay *overlay)
        flip_addr |= OFC_UPDATE;
 
        /* wait for overlay to go idle */
-       overlay->hw_wedged = SWITCH_OFF_STAGE_1;
-
        BEGIN_LP_RING(4);
        OUT_RING(MI_OVERLAY_FLIP | MI_OVERLAY_CONTINUE);
        OUT_RING(flip_addr);
@@ -375,20 +367,12 @@ static int intel_overlay_off(struct intel_overlay *overlay)
        OUT_RING(MI_NOOP);
        ADVANCE_LP_RING();
 
-       overlay->last_flip_req =
-               i915_add_request(dev, NULL, &dev_priv->render_ring);
-       if (overlay->last_flip_req == 0)
-               return -ENOMEM;
-
-       ret = i915_do_wait_request(dev,
-                                  overlay->last_flip_req, true,
-                                  &dev_priv->render_ring);
-       if (ret != 0)
+       ret = intel_overlay_do_wait_request(overlay, true,
+                                           SWITCH_OFF_STAGE_1);
+       if (ret)
                return ret;
 
        /* turn overlay off */
-       overlay->hw_wedged = SWITCH_OFF_STAGE_2;
-
        BEGIN_LP_RING(4);
        OUT_RING(MI_OVERLAY_FLIP | MI_OVERLAY_OFF);
        OUT_RING(flip_addr);
@@ -396,20 +380,8 @@ static int intel_overlay_off(struct intel_overlay *overlay)
        OUT_RING(MI_NOOP);
        ADVANCE_LP_RING();
 
-       overlay->last_flip_req =
-               i915_add_request(dev, NULL, &dev_priv->render_ring);
-       if (overlay->last_flip_req == 0)
-               return -ENOMEM;
-
-       ret = i915_do_wait_request(dev,
-                                  overlay->last_flip_req, true,
-                                  &dev_priv->render_ring);
-       if (ret != 0)
-               return ret;
-
-       overlay->hw_wedged = 0;
-       overlay->last_flip_req = 0;
-       return ret;
+       return intel_overlay_do_wait_request(overlay, true,
+                                            SWITCH_OFF_STAGE_2);
 }
 
 static void intel_overlay_off_tail(struct intel_overlay *overlay)
@@ -443,16 +415,9 @@ int intel_overlay_recover_from_interrupt(struct intel_overlay *overlay,
        if (overlay->hw_wedged == HW_WEDGED)
                return -EIO;
 
-       if (overlay->last_flip_req == 0) {
-               overlay->last_flip_req =
-                       i915_add_request(dev, NULL, &dev_priv->render_ring);
-               if (overlay->last_flip_req == 0)
-                       return -ENOMEM;
-       }
-
        ret = i915_do_wait_request(dev, overlay->last_flip_req,
                                   interruptible, &dev_priv->render_ring);
-       if (ret != 0)
+       if (ret)
                return ret;
 
        switch (overlay->hw_wedged) {
@@ -462,12 +427,11 @@ int intel_overlay_recover_from_interrupt(struct intel_overlay *overlay,
                drm_gem_object_unreference(obj);
                overlay->old_vid_bo = NULL;
                break;
+
        case SWITCH_OFF_STAGE_1:
                flip_addr = overlay->flip_addr;
                flip_addr |= OFC_UPDATE;
 
-               overlay->hw_wedged = SWITCH_OFF_STAGE_2;
-
                BEGIN_LP_RING(4);
                OUT_RING(MI_OVERLAY_FLIP | MI_OVERLAY_OFF);
                OUT_RING(flip_addr);
@@ -475,16 +439,9 @@ int intel_overlay_recover_from_interrupt(struct intel_overlay *overlay,
                OUT_RING(MI_NOOP);
                ADVANCE_LP_RING();
 
-               overlay->last_flip_req =
-                       i915_add_request(dev, NULL,
-                                        &dev_priv->render_ring);
-               if (overlay->last_flip_req == 0)
-                       return -ENOMEM;
-
-               ret = i915_do_wait_request(dev, overlay->last_flip_req,
-                                          interruptible,
-                                          &dev_priv->render_ring);
-               if (ret != 0)
+               ret = intel_overlay_do_wait_request(overlay, interruptible,
+                                                   SWITCH_OFF_STAGE_2);
+               if (ret)
                        return ret;
 
        case SWITCH_OFF_STAGE_2: