--- amdgpu_drv.c	2026-09-07 01:55:49.309043000 +0000
+++ amdgpu_drv.c	2026-09-07 01:49:39.373117000 +0000
@@ -53,9 +53,42 @@
 #include "../amdxcp/amdgpu_xcp_drv.h"
 
 #ifdef __FreeBSD__
+#include <sys/sysctl.h>
+
 SYSCTL_NODE(_hw, OID_AUTO, amdgpu,
     CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
     DRIVER_DESC " parameters");
+
+static struct amdgpu_device *amdgpu_sysctl_adev;
+
+static int sysctl_hw_amdgpu_power1_cap(SYSCTL_HANDLER_ARGS)
+{
+        struct amdgpu_device *adev = amdgpu_sysctl_adev;
+        uint32_t limit;
+        int error, val;
+
+        if (adev == NULL)
+                return (ENXIO);
+
+        error = amdgpu_dpm_get_power_limit(adev, &limit,
+            PP_PWR_LIMIT_CURRENT, 0);
+        if (error)
+                return (error);
+
+        val = (int)limit;
+        error = sysctl_handle_int(oidp, &val, 0, req);
+        if (error || !req->newptr)
+                return (error);
+
+        limit = (uint32_t)val;
+        error = amdgpu_dpm_set_power_limit(adev, limit);
+        return (error);
+}
+
+SYSCTL_PROC(_hw_amdgpu, OID_AUTO, power1_cap,
+    CTLTYPE_INT | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
+    NULL, 0, sysctl_hw_amdgpu_power1_cap, "I",
+    "GPU power cap in watts (power1_cap)");
 #endif
 
 /*
@@ -2364,6 +2397,7 @@
 	amdgpu_init_debug_options(adev);
 
 	ret = amdgpu_driver_load_kms(adev, flags);
+	amdgpu_sysctl_adev = adev;
 	if (ret)
 		goto err_pci;