diff --git a/drivers/gpu/drm/v3d/v3d_debugfs.c b/drivers/gpu/drm/v3d/v3d_debugfs.c
index 4db62c545748..d48008adb085 100644
--- a/drivers/gpu/drm/v3d/v3d_debugfs.c
+++ b/drivers/gpu/drm/v3d/v3d_debugfs.c
@@ -176,9 +176,44 @@ static int v3d_debugfs_bo_stats(struct seq_file *m, void *unused)
 	return 0;
 }
 
+static int v3d_measure_clock(struct seq_file *m, void *unused)
+{
+	struct drm_info_node *node = (struct drm_info_node *)m->private;
+	struct drm_device *dev = node->minor->dev;
+	struct v3d_dev *v3d = to_v3d_dev(dev);
+	uint32_t cycles;
+	int core = 0;
+	int measure_ms = 1000;
+
+	if (v3d->ver >= 40) {
+		V3D_CORE_WRITE(core, V3D_V4_PCTR_0_SRC_0_3,
+			       V3D_SET_FIELD(V3D_PCTR_CYCLE_COUNT,
+					     V3D_PCTR_S0));
+		V3D_CORE_WRITE(core, V3D_V4_PCTR_0_CLR, 1);
+		V3D_CORE_WRITE(core, V3D_V4_PCTR_0_EN, 1);
+	} else {
+		V3D_CORE_WRITE(core, V3D_V3_PCTR_0_PCTRS0,
+			       V3D_PCTR_CYCLE_COUNT);
+		V3D_CORE_WRITE(core, V3D_V3_PCTR_0_CLR, 1);
+		V3D_CORE_WRITE(core, V3D_V3_PCTR_0_EN,
+			       V3D_V3_PCTR_0_EN_ENABLE |
+			       1);
+	}
+	msleep(measure_ms);
+	cycles = V3D_CORE_READ(core, V3D_PCTR_0_PCTR0);
+
+	seq_printf(m, "cycles: %d (%d.%d Mhz)\n",
+		   cycles,
+		   cycles / (measure_ms * 1000),
+		   (cycles / (measure_ms * 100)) % 10);
+
+	return 0;
+}
+
 static const struct drm_info_list v3d_debugfs_list[] = {
 	{"v3d_ident", v3d_v3d_debugfs_ident, 0},
 	{"v3d_regs", v3d_v3d_debugfs_regs, 0},
+	{"measure_clock", v3d_measure_clock, 0},
 	{"bo_stats", v3d_debugfs_bo_stats, 0},
 };
 
diff --git a/drivers/gpu/drm/v3d/v3d_regs.h b/drivers/gpu/drm/v3d/v3d_regs.h
index 854046565989..c3a5e4e44f73 100644
--- a/drivers/gpu/drm/v3d/v3d_regs.h
+++ b/drivers/gpu/drm/v3d/v3d_regs.h
@@ -267,6 +267,36 @@
 # define V3D_PTB_BXCF_RWORDERDISA                      BIT(1)
 # define V3D_PTB_BXCF_CLIPDISA                         BIT(0)
 
+#define V3D_V3_PCTR_0_EN                               0x00674
+#define V3D_V3_PCTR_0_EN_ENABLE                        BIT(31)
+#define V3D_V4_PCTR_0_EN                               0x00650
+/* When a bit is set, resets the counter to 0. */
+#define V3D_V3_PCTR_0_CLR                              0x00670
+#define V3D_V4_PCTR_0_CLR                              0x00654
+#define V3D_PCTR_0_OVERFLOW                            0x00658
+
+#define V3D_V3_PCTR_0_PCTRS0                           0x00684
+#define V3D_V3_PCTR_0_PCTRS15                          0x00660
+#define V3D_V3_PCTR_0_PCTRSX(x)                        (V3D_V3_PCTR_0_PCTRS0 + \
+							4 * (x))
+/* Each src reg muxes four counters each. */
+#define V3D_V4_PCTR_0_SRC_0_3                          0x00660
+#define V3D_V4_PCTR_0_SRC_28_31                        0x0067c
+# define V3D_PCTR_S0_MASK                              V3D_MASK(6, 0)
+# define V3D_PCTR_S0_SHIFT                             0
+# define V3D_PCTR_S1_MASK                              V3D_MASK(14, 8)
+# define V3D_PCTR_S1_SHIFT                             8
+# define V3D_PCTR_S2_MASK                              V3D_MASK(22, 16)
+# define V3D_PCTR_S2_SHIFT                             16
+# define V3D_PCTR_S3_MASK                              V3D_MASK(30, 24)
+# define V3D_PCTR_S3_SHIFT                             24
+# define V3D_PCTR_CYCLE_COUNT                          32
+
+/* Output values of the counters. */
+#define V3D_PCTR_0_PCTR0                               0x00680
+#define V3D_PCTR_0_PCTR31                              0x006fc
+#define V3D_PCTR_0_PCTRX(x)                            (V3D_PCTR_0_PCTR0 + \
+							4 * (x))
 #define V3D_GMP_STATUS                                 0x00800
 # define V3D_GMP_STATUS_GMPRST                         BIT(31)
 # define V3D_GMP_STATUS_WR_COUNT_MASK                  V3D_MASK(30, 24)