diff --git a/drivers/gpu/host1x/Makefile b/drivers/gpu/host1x/Makefile
index b5e7e933..affedf2c 100644
--- a/drivers/gpu/host1x/Makefile
+++ b/drivers/gpu/host1x/Makefile
@@ -15,6 +15,7 @@ host1x-next-y = \
 	debug.o \
 	mipi.o \
 	fence.o \
+	actmon.o \
 	hw/host1x01.o \
 	hw/host1x02.o \
 	hw/host1x04.o \
diff --git a/drivers/gpu/host1x/actmon.c b/drivers/gpu/host1x/actmon.c
new file mode 100644
index 00000000..33bac0db
--- /dev/null
+++ b/drivers/gpu/host1x/actmon.c
@@ -0,0 +1,36 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Tegra host1x activity monitor interfaes
+ *
+ * Copyright (c) 2023, NVIDIA Corporation.
+ */
+
+#include "dev.h"
+
+int host1x_actmon_read_avg_count(struct host1x_client *client)
+{
+	struct host1x *host = dev_get_drvdata(client->host->parent);
+	unsigned int offset;
+
+	if (!host->actmon_regs)
+		return -ENODEV;
+
+	/* FIXME: Only T234 supported */
+
+	switch (client->class) {
+	case HOST1X_CLASS_NVENC:
+		offset = 0x0;
+		break;
+	case HOST1X_CLASS_VIC:
+		offset = 0x10000;
+		break;
+	case HOST1X_CLASS_NVDEC:
+		offset = 0x20000;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return readl(host->actmon_regs + offset + 0xa4);
+}
+EXPORT_SYMBOL(host1x_actmon_read_avg_count);
diff --git a/drivers/gpu/host1x/dev.c b/drivers/gpu/host1x/dev.c
index 2ea38483..9746969c 100644
--- a/drivers/gpu/host1x/dev.c
+++ b/drivers/gpu/host1x/dev.c
@@ -748,6 +748,7 @@ static int host1x_get_syncpt_pools(struct host1x *host)
 
 static int host1x_probe(struct platform_device *pdev)
 {
+	struct resource *res;
 	struct host1x *host;
 	int err;
 
@@ -758,8 +759,6 @@ static int host1x_probe(struct platform_device *pdev)
 	host->info = of_device_get_match_data(&pdev->dev);
 
 	if (host->info->has_hypervisor) {
-		struct resource *res;
-
 		host->regs = devm_platform_ioremap_resource_byname(pdev, "vm");
 		if (IS_ERR(host->regs))
 			return PTR_ERR(host->regs);
@@ -782,6 +781,13 @@ static int host1x_probe(struct platform_device *pdev)
 			return PTR_ERR(host->regs);
 	}
 
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "actmon");
+	if (res) {
+		host->actmon_regs = devm_ioremap_resource(&pdev->dev, res);
+		if (IS_ERR(host->actmon_regs))
+			return PTR_ERR(host->actmon_regs);
+	}
+
 	host->syncpt_irq = platform_get_irq(pdev, 0);
 	if (host->syncpt_irq < 0)
 		return host->syncpt_irq;
diff --git a/drivers/gpu/host1x/dev.h b/drivers/gpu/host1x/dev.h
index 25e3f770..7a3ebf70 100644
--- a/drivers/gpu/host1x/dev.h
+++ b/drivers/gpu/host1x/dev.h
@@ -130,6 +130,7 @@ struct host1x {
 	void __iomem *regs;
 	void __iomem *hv_regs; /* hypervisor region */
 	void __iomem *common_regs;
+	void __iomem *actmon_regs;
 	int syncpt_irq;
 	struct host1x_syncpt *syncpt;
 	struct host1x_syncpt_base *bases;
diff --git a/drivers/gpu/host1x/include/linux/host1x-next.h b/drivers/gpu/host1x/include/linux/host1x-next.h
index 3e67ed56..0c0134f0 100644
--- a/drivers/gpu/host1x/include/linux/host1x-next.h
+++ b/drivers/gpu/host1x/include/linux/host1x-next.h
@@ -506,4 +506,6 @@ static inline void host1x_memory_context_put(struct host1x_memory_context *cd)
 }
 #endif
 
+int host1x_actmon_read_avg_count(struct host1x_client *client);
+
 #endif