drm/i915: Consolidate plane 'prepare' functions (v2)

The 'prepare' step for all types of planes are pretty similar;
consolidate the three 'prepare' functions into a single function.  This
paves the way for future integration with the atomic plane handlers.

Note that we pull the 'wait for pending flips' functionality out of the
primary plane's prepare step and place it directly in the 'setplane'
code.  When we move to the atomic plane handlers, this code will be in
the 'atomic begin' step.

v2: Update GEM fb tracking for physical cursors also (Ander)

Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_display.c

@@ -11689,6 +11689,65 @@ intel_primary_plane_disable(struct drm_plane *plane)
 	return 0;
 }
 
+/**
+ * intel_prepare_plane_fb - Prepare fb for usage on plane
+ * @plane: drm plane to prepare for
+ * @fb: framebuffer to prepare for presentation
+ *
+ * Prepares a framebuffer for usage on a display plane.  Generally this
+ * involves pinning the underlying object and updating the frontbuffer tracking
+ * bits.  Some older platforms need special physical address handling for
+ * cursor planes.
+ *
+ * Returns 0 on success, negative error code on failure.
+ */
+int
+intel_prepare_plane_fb(struct drm_plane *plane,
+		       struct drm_framebuffer *fb)
+{
+	struct drm_device *dev = plane->dev;
+	struct intel_plane *intel_plane = to_intel_plane(plane);
+	enum pipe pipe = intel_plane->pipe;
+	struct drm_i915_gem_object *obj = intel_fb_obj(fb);
+	struct drm_i915_gem_object *old_obj = intel_fb_obj(plane->fb);
+	unsigned frontbuffer_bits = 0;
+	int ret = 0;
+
+	if (WARN_ON(fb == plane->fb || !obj))
+		return 0;
+
+	switch (plane->type) {
+	case DRM_PLANE_TYPE_PRIMARY:
+		frontbuffer_bits = INTEL_FRONTBUFFER_PRIMARY(pipe);
+		break;
+	case DRM_PLANE_TYPE_CURSOR:
+		frontbuffer_bits = INTEL_FRONTBUFFER_CURSOR(pipe);
+		break;
+	case DRM_PLANE_TYPE_OVERLAY:
+		frontbuffer_bits = INTEL_FRONTBUFFER_SPRITE(pipe);
+		break;
+	}
+
+	mutex_lock(&dev->struct_mutex);
+
+	if (plane->type == DRM_PLANE_TYPE_CURSOR &&
+	    INTEL_INFO(dev)->cursor_needs_physical) {
+		int align = IS_I830(dev) ? 16 * 1024 : 256;
+		ret = i915_gem_object_attach_phys(obj, align);
+		if (ret)
+			DRM_DEBUG_KMS("failed to attach phys object\n");
+	} else {
+		ret = intel_pin_and_fence_fb_obj(plane, fb, NULL);
+	}
+
+	if (ret == 0)
+		i915_gem_track_fb(old_obj, obj, frontbuffer_bits);
+
+	mutex_unlock(&dev->struct_mutex);
+
+	return ret;
+}
+
 static int
 intel_check_primary_plane(struct drm_plane *plane,
 			  struct intel_plane_state *state)
@@ -11706,42 +11765,6 @@ intel_check_primary_plane(struct drm_plane *plane,
 					     false, true, &state->visible);
 }
 
-static int
-intel_prepare_primary_plane(struct drm_plane *plane,
-			    struct intel_plane_state *state)
-{
-	struct drm_crtc *crtc = state->base.crtc;
-	struct drm_framebuffer *fb = state->base.fb;
-	struct drm_device *dev = crtc->dev;
-	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
-	enum pipe pipe = intel_crtc->pipe;
-	struct drm_i915_gem_object *obj = intel_fb_obj(fb);
-	struct drm_i915_gem_object *old_obj = intel_fb_obj(plane->fb);
-	int ret;
-
-	intel_crtc_wait_for_pending_flips(crtc);
-
-	if (intel_crtc_has_pending_flip(crtc)) {
-		DRM_ERROR("pipe is still busy with an old pageflip\n");
-		return -EBUSY;
-	}
-
-	if (old_obj != obj) {
-		mutex_lock(&dev->struct_mutex);
-		ret = intel_pin_and_fence_fb_obj(plane, fb, NULL);
-		if (ret == 0)
-			i915_gem_track_fb(old_obj, obj,
-					  INTEL_FRONTBUFFER_PRIMARY(pipe));
-		mutex_unlock(&dev->struct_mutex);
-		if (ret != 0) {
-			DRM_DEBUG_KMS("pin & fence failed\n");
-			return ret;
-		}
-	}
-
-	return 0;
-}
-
 static void
 intel_commit_primary_plane(struct drm_plane *plane,
 			   struct intel_plane_state *state)
@@ -11843,6 +11866,7 @@ intel_primary_plane_setplane(struct drm_plane *plane, struct drm_crtc *crtc,
 			     uint32_t src_x, uint32_t src_y,
 			     uint32_t src_w, uint32_t src_h)
 {
+	struct drm_framebuffer *old_fb = plane->fb;
 	struct intel_plane_state state;
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 	int ret;
@@ -11874,9 +11898,18 @@ intel_primary_plane_setplane(struct drm_plane *plane, struct drm_crtc *crtc,
 	if (ret)
 		return ret;
 
-	ret = intel_prepare_primary_plane(plane, &state);
-	if (ret)
-		return ret;
+	intel_crtc_wait_for_pending_flips(crtc);
+
+	if (intel_crtc_has_pending_flip(crtc)) {
+		DRM_ERROR("pipe is still busy with an old pageflip\n");
+		return -EBUSY;
+	}
+
+	if (fb != old_fb && fb) {
+		ret = intel_prepare_plane_fb(plane, fb);
+		if (ret)
+			return ret;
+	}
 
 	intel_commit_primary_plane(plane, &state);
 
@@ -12013,42 +12046,6 @@ intel_check_cursor_plane(struct drm_plane *plane,
 	return ret;
 }
 
-static int
-intel_prepare_cursor_plane(struct drm_plane *plane,
-			   struct intel_plane_state *state)
-{
-	struct drm_device *dev = plane->dev;
-	struct drm_framebuffer *fb = state->base.fb;
-	struct intel_crtc *intel_crtc = to_intel_crtc(state->base.crtc);
-	struct drm_i915_gem_object *obj = intel_fb_obj(fb);
-	struct drm_i915_gem_object *old_obj = intel_fb_obj(plane->fb);
-	enum pipe pipe = intel_crtc->pipe;
-	int ret = 0;
-
-	if (old_obj != obj) {
-		/* we only need to pin inside GTT if cursor is non-phy */
-		mutex_lock(&dev->struct_mutex);
-		if (!INTEL_INFO(dev)->cursor_needs_physical) {
-			if (obj)
-				ret = intel_pin_and_fence_fb_obj(plane, fb, NULL);
-		} else {
-			int align = IS_I830(dev) ? 16 * 1024 : 256;
-			if (obj)
-				ret = i915_gem_object_attach_phys(obj, align);
-			if (ret)
-				DRM_DEBUG_KMS("failed to attach phys object\n");
-		}
-
-		if (ret == 0)
-			i915_gem_track_fb(intel_crtc->cursor_bo, obj,
-					  INTEL_FRONTBUFFER_CURSOR(pipe));
-
-		mutex_unlock(&dev->struct_mutex);
-	}
-
-	return ret;
-}
-
 static void
 intel_commit_cursor_plane(struct drm_plane *plane,
 			  struct intel_plane_state *state)
@@ -12058,6 +12055,7 @@ intel_commit_cursor_plane(struct drm_plane *plane,
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 	struct intel_plane *intel_plane = to_intel_plane(plane);
 	struct drm_i915_gem_object *obj = intel_fb_obj(state->base.fb);
+	struct drm_i915_gem_object *old_obj = intel_fb_obj(plane->fb);
 	enum pipe pipe = intel_crtc->pipe;
 	unsigned old_width;
 	uint32_t addr;
@@ -12079,6 +12077,17 @@ intel_commit_cursor_plane(struct drm_plane *plane,
 	if (intel_crtc->cursor_bo == obj)
 		goto update;
 
+	/*
+	 * 'prepare' is only called when fb != NULL; we still need to update
+	 * frontbuffer tracking for the 'disable' case here.
+	 */
+	if (!obj) {
+		mutex_lock(&dev->struct_mutex);
+		i915_gem_track_fb(old_obj, NULL,
+				  INTEL_FRONTBUFFER_CURSOR(pipe));
+		mutex_unlock(&dev->struct_mutex);
+	}
+
 	if (!obj)
 		addr = 0;
 	else if (!INTEL_INFO(dev)->cursor_needs_physical)
@@ -12118,6 +12127,7 @@ intel_cursor_plane_update(struct drm_plane *plane, struct drm_crtc *crtc,
 			  uint32_t src_x, uint32_t src_y,
 			  uint32_t src_w, uint32_t src_h)
 {
+	struct drm_framebuffer *old_fb = plane->fb;
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 	struct intel_plane_state state;
 	int ret;
@@ -12149,9 +12159,11 @@ intel_cursor_plane_update(struct drm_plane *plane, struct drm_crtc *crtc,
 	if (ret)
 		return ret;
 
-	ret = intel_prepare_cursor_plane(plane, &state);
-	if (ret)
-		return ret;
+	if (fb != old_fb && fb) {
+		ret = intel_prepare_plane_fb(plane, fb);
+		if (ret)
+			return ret;
+	}
 
 	intel_commit_cursor_plane(plane, &state);
 

drivers/gpu/drm/i915/intel_drv.h

@@ -922,6 +922,8 @@ void intel_prepare_page_flip(struct drm_device *dev, int plane);
 void intel_finish_page_flip(struct drm_device *dev, int pipe);
 void intel_finish_page_flip_plane(struct drm_device *dev, int plane);
 void intel_check_page_flip(struct drm_device *dev, int pipe);
+int intel_prepare_plane_fb(struct drm_plane *plane,
+			   struct drm_framebuffer *fb);
 
 /* shared dpll functions */
 struct intel_shared_dpll *intel_crtc_to_shared_dpll(struct intel_crtc *crtc);

drivers/gpu/drm/i915/intel_sprite.c

@@ -1257,41 +1257,6 @@ intel_check_sprite_plane(struct drm_plane *plane,
 	return 0;
 }
 
-static int
-intel_prepare_sprite_plane(struct drm_plane *plane,
-			   struct intel_plane_state *state)
-{
-	struct drm_device *dev = plane->dev;
-	struct drm_crtc *crtc = state->base.crtc;
-	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
-	struct intel_plane *intel_plane = to_intel_plane(plane);
-	enum pipe pipe = intel_crtc->pipe;
-	struct drm_framebuffer *fb = state->base.fb;
-	struct drm_i915_gem_object *obj = intel_fb_obj(fb);
-	struct drm_i915_gem_object *old_obj = intel_plane->obj;
-	int ret;
-
-	if (old_obj != obj) {
-		mutex_lock(&dev->struct_mutex);
-
-		/* Note that this will apply the VT-d workaround for scanouts,
-		 * which is more restrictive than required for sprites. (The
-		 * primary plane requires 256KiB alignment with 64 PTE padding,
-		 * the sprite planes only require 128KiB alignment and 32 PTE
-		 * padding.
-		 */
-		ret = intel_pin_and_fence_fb_obj(plane, fb, NULL);
-		if (ret == 0)
-			i915_gem_track_fb(old_obj, obj,
-					  INTEL_FRONTBUFFER_SPRITE(pipe));
-		mutex_unlock(&dev->struct_mutex);
-		if (ret)
-			return ret;
-	}
-
-	return 0;
-}
-
 static void
 intel_commit_sprite_plane(struct drm_plane *plane,
 			  struct intel_plane_state *state)
@@ -1387,6 +1352,7 @@ intel_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
 		   uint32_t src_x, uint32_t src_y,
 		   uint32_t src_w, uint32_t src_h)
 {
+	struct drm_framebuffer *old_fb = plane->fb;
 	struct intel_plane_state state;
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 	int ret;
@@ -1417,9 +1383,11 @@ intel_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
 	if (ret)
 		return ret;
 
-	ret = intel_prepare_sprite_plane(plane, &state);
-	if (ret)
-		return ret;
+	if (fb != old_fb && fb) {
+		ret = intel_prepare_plane_fb(plane, fb);
+		if (ret)
+			return ret;
+	}
 
 	intel_commit_sprite_plane(plane, &state);
 	return 0;