--- a/sys/dev/drm/i915/intel_pm.c
+++ b/sys/dev/drm/i915/intel_pm.c
@@ -3820,7 +3820,7 @@
 
 static u16 intel_get_ddb_size(struct drm_i915_private *dev_priv,
 			      const struct intel_crtc_state *cstate,
-			      const unsigned int total_data_rate,
+			      const uint64_t total_data_rate,
 			      const int num_active,
 			      struct skl_ddb_allocation *ddb)
 {
@@ -3852,7 +3852,7 @@
 static void
 skl_ddb_get_pipe_allocation_limits(struct drm_device *dev,
 				   const struct intel_crtc_state *cstate,
-				   const unsigned int total_data_rate,
+				   const uint64_t total_data_rate,
 				   struct skl_ddb_allocation *ddb,
 				   struct skl_ddb_entry *alloc, /* out */
 				   int *num_active /* out */)
@@ -4175,7 +4175,7 @@
 	return 0;
 }
 
-static unsigned int
+static uint64_t
 skl_plane_relative_data_rate(const struct intel_crtc_state *cstate,
 			     const struct drm_plane_state *pstate,
 			     const int plane)
@@ -4187,6 +4187,7 @@
 	struct drm_framebuffer *fb;
 	u32 format;
 	uint_fixed_16_16_t down_scale_amount;
+	uint64_t rate;
 
 	if (!intel_pstate->base.visible)
 		return 0;
@@ -4213,11 +4214,14 @@
 		height /= 2;
 	}
 
-	data_rate = width * height * fb->format->cpp[plane];
+	data_rate = width * height;
 
 	down_scale_amount = skl_plane_downscale_amount(cstate, intel_pstate);
 
-	return mul_round_up_u32_fixed16(data_rate, down_scale_amount);
+	rate = mul_round_up_u32_fixed16(data_rate, down_scale_amount);
+	rate *= fb->format->cpp[plane];
+
+	return rate;
 }
 
 /*
@@ -4225,16 +4229,16 @@
  * a 8192x4096@32bpp framebuffer:
  *   3 * 4096 * 8192  * 4 < 2^32
  */
-static unsigned int
+static uint64_t
 skl_get_total_relative_data_rate(struct intel_crtc_state *intel_cstate,
-				 unsigned int *plane_data_rate,
-				 unsigned int *uv_plane_data_rate)
+				 uint64_t *plane_data_rate,
+				 uint64_t *uv_plane_data_rate)
 {
 	struct drm_crtc_state *cstate = &intel_cstate->base;
 	struct drm_atomic_state *state = cstate->state;
 	struct drm_plane *plane;
 	const struct drm_plane_state *pstate;
-	unsigned int total_data_rate = 0;
+	uint64_t total_data_rate = 0;
 
 	if (WARN_ON(!state))
 		return 0;
@@ -4242,7 +4246,7 @@
 	/* Calculate and cache data rate for each plane */
 	drm_atomic_crtc_state_for_each_plane_state(plane, pstate, cstate) {
 		enum plane_id plane_id = to_intel_plane(plane)->id;
-		unsigned int rate;
+		uint64_t rate;
 
 		/* packed/y */
 		rate = skl_plane_relative_data_rate(intel_cstate,
@@ -4361,11 +4365,11 @@
 	uint16_t alloc_size, start;
 	uint16_t minimum[I915_MAX_PLANES] = {};
 	uint16_t uv_minimum[I915_MAX_PLANES] = {};
-	unsigned int total_data_rate;
+	uint64_t total_data_rate;
 	enum plane_id plane_id;
 	int num_active;
-	unsigned int plane_data_rate[I915_MAX_PLANES] = {};
-	unsigned int uv_plane_data_rate[I915_MAX_PLANES] = {};
+	uint64_t plane_data_rate[I915_MAX_PLANES] = {};
+	uint64_t uv_plane_data_rate[I915_MAX_PLANES] = {};
 	uint16_t total_min_blocks = 0;
 
 	/* Clear the partitioning for disabled planes. */
@@ -4424,7 +4428,7 @@
 
 	start = alloc->start;
 	for_each_plane_id_on_crtc(intel_crtc, plane_id) {
-		unsigned int data_rate, uv_data_rate;
+		uint64_t data_rate, uv_data_rate;
 		uint16_t plane_blocks, uv_plane_blocks;
 
 		if (plane_id == PLANE_CURSOR)