diff --git a/drivers/gpu/drm/i915/gt/intel_rps.c b/drivers/gpu/drm/i915/gt/intel_rps.c
index c7d381ad90cf..8c289a032103 100644
--- a/drivers/gpu/drm/i915/gt/intel_rps.c
+++ b/drivers/gpu/drm/i915/gt/intel_rps.c
@@ -1107,7 +1107,12 @@ void gen6_rps_get_freq_caps(struct intel_rps *rps, struct intel_rps_freq_caps *c
 		caps->min_freq = (rp_state_cap >>  0) & 0xff;
 	} else {
 		caps->rp0_freq = (rp_state_cap >>  0) & 0xff;
-		caps->rp1_freq = (rp_state_cap >>  8) & 0xff;
+		if (GRAPHICS_VER(i915) >= 10)
+			caps->rp1_freq = REG_FIELD_GET(RPE_MASK,
+						       intel_uncore_read(to_gt(i915)->uncore,
+						       GEN10_FREQ_INFO_REC));
+		else
+			caps->rp1_freq = (rp_state_cap >>  8) & 0xff;
 		caps->min_freq = (rp_state_cap >> 16) & 0xff;
 	}
 
diff --git a/drivers/gpu/drm/i915/gt/selftest_slpc.c b/drivers/gpu/drm/i915/gt/selftest_slpc.c
index ac29691e0b1a..f8a1d27df272 100644
--- a/drivers/gpu/drm/i915/gt/selftest_slpc.c
+++ b/drivers/gpu/drm/i915/gt/selftest_slpc.c
@@ -166,6 +166,15 @@ static int run_test(struct intel_gt *gt, int test_type)
 		return -EIO;
 	}
 
+	/*
+	 * FIXME: With efficient frequency enabled, GuC can request
+	 * frequencies higher than the SLPC max. While this is fixed
+	 * in GuC, we level set these tests with RPn as min.
+	 */
+	err = slpc_set_min_freq(slpc, slpc->min_freq);
+	if (err)
+		return err;
+
 	if (slpc->min_freq == slpc->rp0_freq) {
 		pr_err("Min/Max are fused to the same value\n");
 		return -EINVAL;
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c
index e1fa1f32f29e..9d49ccef03bb 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c
@@ -137,17 +137,6 @@ static int guc_action_slpc_set_param(struct intel_guc *guc, u8 id, u32 value)
 	return ret > 0 ? -EPROTO : ret;
 }
 
-static int guc_action_slpc_unset_param(struct intel_guc *guc, u8 id)
-{
-	u32 request[] = {
-		GUC_ACTION_HOST2GUC_PC_SLPC_REQUEST,
-		SLPC_EVENT(SLPC_EVENT_PARAMETER_UNSET, 1),
-		id,
-	};
-
-	return intel_guc_send(guc, request, ARRAY_SIZE(request));
-}
-
 static bool slpc_is_running(struct intel_guc_slpc *slpc)
 {
 	return slpc_get_state(slpc) == SLPC_GLOBAL_STATE_RUNNING;
@@ -201,16 +190,6 @@ static int slpc_set_param(struct intel_guc_slpc *slpc, u8 id, u32 value)
 	return ret;
 }
 
-static int slpc_unset_param(struct intel_guc_slpc *slpc,
-			    u8 id)
-{
-	struct intel_guc *guc = slpc_to_guc(slpc);
-
-	GEM_BUG_ON(id >= SLPC_MAX_PARAM);
-
-	return guc_action_slpc_unset_param(guc, id);
-}
-
 static int slpc_force_min_freq(struct intel_guc_slpc *slpc, u32 freq)
 {
 	struct drm_i915_private *i915 = slpc_to_i915(slpc);
@@ -491,6 +470,16 @@ int intel_guc_slpc_set_min_freq(struct intel_guc_slpc *slpc, u32 val)
 
 	with_intel_runtime_pm(&i915->runtime_pm, wakeref) {
 
+		/* Ignore efficient freq if lower min freq is requested */
+		ret = slpc_set_param(slpc,
+				     SLPC_PARAM_IGNORE_EFFICIENT_FREQUENCY,
+				     val < slpc->rp1_freq);
+		if (unlikely(ret)) {
+			i915_probe_error(i915, "Failed to toggle efficient freq (%pe)\n",
+					 ERR_PTR(ret));
+			return ret;
+		}
+
 		ret = slpc_set_param(slpc,
 				     SLPC_PARAM_GLOBAL_MIN_GT_UNSLICE_FREQ_MHZ,
 				     val);
@@ -587,7 +576,9 @@ static int slpc_set_softlimits(struct intel_guc_slpc *slpc)
 		return ret;
 
 	if (!slpc->min_freq_softlimit) {
-		slpc->min_freq_softlimit = slpc->min_freq;
+		ret = intel_guc_slpc_get_min_freq(slpc, &slpc->min_freq_softlimit);
+		if (unlikely(ret))
+			return ret;
 		slpc_to_gt(slpc)->defaults.min_freq = slpc->min_freq_softlimit;
 	} else if (slpc->min_freq_softlimit != slpc->min_freq) {
 		return intel_guc_slpc_set_min_freq(slpc,
@@ -597,29 +588,6 @@ static int slpc_set_softlimits(struct intel_guc_slpc *slpc)
 	return 0;
 }
 
-static int slpc_ignore_eff_freq(struct intel_guc_slpc *slpc, bool ignore)
-{
-	int ret = 0;
-
-	if (ignore) {
-		ret = slpc_set_param(slpc,
-				     SLPC_PARAM_IGNORE_EFFICIENT_FREQUENCY,
-				     ignore);
-		if (!ret)
-			return slpc_set_param(slpc,
-					      SLPC_PARAM_GLOBAL_MIN_GT_UNSLICE_FREQ_MHZ,
-					      slpc->min_freq);
-	} else {
-		ret = slpc_unset_param(slpc,
-				       SLPC_PARAM_IGNORE_EFFICIENT_FREQUENCY);
-		if (!ret)
-			return slpc_unset_param(slpc,
-						SLPC_PARAM_GLOBAL_MIN_GT_UNSLICE_FREQ_MHZ);
-	}
-
-	return ret;
-}
-
 static int slpc_use_fused_rp0(struct intel_guc_slpc *slpc)
 {
 	/* Force SLPC to used platform rp0 */
@@ -679,14 +647,6 @@ int intel_guc_slpc_enable(struct intel_guc_slpc *slpc)
 
 	slpc_get_rp_values(slpc);
 
-	/* Ignore efficient freq and set min to platform min */
-	ret = slpc_ignore_eff_freq(slpc, true);
-	if (unlikely(ret)) {
-		i915_probe_error(i915, "Failed to set SLPC min to RPn (%pe)\n",
-				 ERR_PTR(ret));
-		return ret;
-	}
-
 	/* Set SLPC max limit to RP0 */
 	ret = slpc_use_fused_rp0(slpc);
 	if (unlikely(ret)) {
diff --git a/drivers/gpu/drm/i915/intel_mchbar_regs.h b/drivers/gpu/drm/i915/intel_mchbar_regs.h
index 2aad2f0cc8db..ffc702b79579 100644
--- a/drivers/gpu/drm/i915/intel_mchbar_regs.h
+++ b/drivers/gpu/drm/i915/intel_mchbar_regs.h
@@ -196,6 +196,9 @@
 #define   RP1_CAP_MASK				REG_GENMASK(15, 8)
 #define   RPN_CAP_MASK				REG_GENMASK(23, 16)
 
+#define GEN10_FREQ_INFO_REC			_MMIO(MCHBAR_MIRROR_BASE_SNB + 0x5ef0)
+#define   RPE_MASK				REG_GENMASK(15, 8)
+
 /* snb MCH registers for priority tuning */
 #define MCH_SSKPD				_MMIO(MCHBAR_MIRROR_BASE_SNB + 0x5d10)
 #define   SSKPD_NEW_WM0_MASK_HSW		REG_GENMASK64(63, 56)