diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 6120483..90cc101 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -12956,11 +12956,16 @@ intel_check_primary_plane(struct intel_plane *plane,
 {
 	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
 	struct drm_crtc *crtc = state->base.crtc;
+	struct drm_framebuffer *fb = state->base.fb;
 	int min_scale = DRM_PLANE_HELPER_NO_SCALING;
 	int max_scale = DRM_PLANE_HELPER_NO_SCALING;
-	bool can_position = false;
-	int ret;
+	bool can_position = false, can_scale = false;
 	uint32_t pixel_format = 0;
+	int crtc_x, crtc_y, hscale, vscale, ret;
+	uint32_t src_x, src_y, src_w, src_h, crtc_w, crtc_h;
+	struct drm_rect *src = &state->base.src;
+	struct drm_rect *dst = &state->base.dst;
+	struct drm_rect clip = {};
 
 	if (INTEL_GEN(dev_priv) >= 9) {
 		/* use scaler when colorkey is not required */
@@ -12972,6 +12977,7 @@ intel_check_primary_plane(struct intel_plane *plane,
 						  crtc_state, pixel_format);
 		}
 		can_position = true;
+		can_scale = true;
 	}
 
 	ret = drm_atomic_helper_check_plane_state(&state->base,
@@ -12984,6 +12990,123 @@ intel_check_primary_plane(struct intel_plane *plane,
 	if (!state->base.fb)
 		return 0;
 
+	*src = drm_plane_state_src(&state->base);
+	*dst = drm_plane_state_dest(&state->base);
+
+	drm_rect_rotate(src, fb->width << 16, fb->height << 16,
+			state->base.rotation);
+
+	hscale = drm_rect_calc_hscale_relaxed(src, dst, min_scale, max_scale);
+	WARN_ON(hscale < 0);
+
+	vscale = drm_rect_calc_vscale_relaxed(src, dst, min_scale, max_scale);
+	WARN_ON(vscale < 0);
+
+	if (crtc_state->base.enable)
+		drm_mode_get_hv_timing(&crtc_state->base.mode,
+				       &clip.x2, &clip.y2);
+
+	state->base.visible =
+		drm_rect_clip_scaled(src, dst, &clip, hscale, vscale);
+
+	crtc_x = dst->x1;
+	crtc_y = dst->y1;
+	crtc_w = drm_rect_width(dst);
+	crtc_h = drm_rect_height(dst);
+
+	if (state->base.visible) {
+		/* check again in case clipping clamped the results */
+		hscale = drm_rect_calc_hscale(src, dst, min_scale, max_scale);
+		if (hscale < 0) {
+			DRM_DEBUG_KMS("Horizontal scaling factor out of limits\n");
+			drm_rect_debug_print("src: ", src, true);
+			drm_rect_debug_print("dst: ", dst, false);
+
+			return hscale;
+		}
+
+		vscale = drm_rect_calc_vscale(src, dst, min_scale, max_scale);
+		if (vscale < 0) {
+			DRM_DEBUG_KMS("Vertical scaling factor out of limits\n");
+			drm_rect_debug_print("src: ", src, true);
+			drm_rect_debug_print("dst: ", dst, false);
+
+			return vscale;
+		}
+
+		/*
+		 * Make the source viewport size an exact
+		 * multiple of the scaling factors.
+		 */
+		drm_rect_adjust_size(src,
+				     drm_rect_width(dst) * hscale - drm_rect_width(src),
+				     drm_rect_height(dst) * vscale - drm_rect_height(src));
+
+		drm_rect_rotate_inv(src, fb->width << 16, fb->height << 16,
+				    state->base.rotation);
+
+		/*
+		 * sanity check to make sure the src
+		 * viewport wasn't enlarged
+		 */
+		WARN_ON(src->x1 < (int) state->base.src_x ||
+			src->y1 < (int) state->base.src_y ||
+			src->x2 > (int) state->base.src_x + state->base.src_w ||
+			src->y2 > (int) state->base.src_y + state->base.src_h);
+
+		src_x = src->x1 >> 16;
+		src_w = drm_rect_width(src) >> 16;
+		src_y = src->y1 >> 16;
+		src_h = drm_rect_height(src) >> 16;
+
+		if (intel_format_is_yuv(fb->format->format)) {
+			src_x &= ~1;
+			src_w &= ~1;
+
+			if (!can_scale)
+				crtc_w &= ~1;
+
+			if (crtc_w == 0)
+				state->base.visible = false;
+		}
+	}
+
+	/* Check size restrictions when scaling */
+	if (state->base.visible && (src_w != crtc_w || src_h != crtc_h)) {
+		unsigned int width_bytes;
+		int cpp = fb->format->cpp[0];
+
+		WARN_ON(!can_scale);
+
+		/* FIXME interlacing min height is 6 */
+
+		if (crtc_w < 3 || crtc_h < 3)
+			state->base.visible = false;
+
+		if (src_w < 3 || src_h < 3)
+			state->base.visible = false;
+
+		width_bytes = ((src_x * cpp) & 63) + src_w * cpp;
+
+		if (INTEL_GEN(dev_priv) < 9 && (src_w > 2048 || src_h > 2048 ||
+		    width_bytes > 4096 || fb->pitches[0] > 4096)) {
+			DRM_DEBUG_KMS("Source dimensions exceed hardware limits\n");
+			return -EINVAL;
+		}
+	}
+
+	if (state->base.visible) {
+		src->x1 = src_x << 16;
+		src->x2 = (src_x + src_w) << 16;
+		src->y1 = src_y << 16;
+		src->y2 = (src_y + src_h) << 16;
+	}
+
+	dst->x1 = crtc_x;
+	dst->x2 = crtc_x + crtc_w;
+	dst->y1 = crtc_y;
+	dst->y2 = crtc_y + crtc_h;
+
 	if (INTEL_GEN(dev_priv) >= 9) {
 		ret = skl_check_plane_surface(crtc_state, state);
 		if (ret)
