diff --git a/drivers/gpu/drm/radeon/ci_dpm.c b/drivers/gpu/drm/radeon/ci_dpm.c
index 9d4699b..22f602d 100644
--- a/drivers/gpu/drm/radeon/ci_dpm.c
+++ b/drivers/gpu/drm/radeon/ci_dpm.c
@@ -776,6 +776,8 @@ bool ci_dpm_vblank_too_short(struct radeon_device *rdev)
 	u32 vblank_time = r600_dpm_get_vblank_time(rdev);
 	u32 switch_limit = pi->mem_gddr5 ? 450 : 300;
 
+	printk("vblank_time: %d, switch_limit: %d\n", vblank_time, switch_limit);
+
 	if (vblank_time < switch_limit)
 		return true;
 	else
diff --git a/drivers/gpu/drm/radeon/r600_dpm.c b/drivers/gpu/drm/radeon/r600_dpm.c
index 843b65f..d46dd92 100644
--- a/drivers/gpu/drm/radeon/r600_dpm.c
+++ b/drivers/gpu/drm/radeon/r600_dpm.c
@@ -169,6 +169,21 @@ u32 r600_dpm_get_vblank_time(struct radeon_device *rdev)
 					radeon_crtc->hw_mode.crtc_vdisplay +
 					(radeon_crtc->v_border * 2);
 				vblank_time_us = vblank_lines * line_time_us;
+				printk("-- %dx%d --\n",
+				       radeon_crtc->hw_mode.crtc_hdisplay,
+				       radeon_crtc->hw_mode.crtc_vdisplay);
+				printk("radeon_crtc->hw_mode.crtc_htotal: %d\n",
+				       radeon_crtc->hw_mode.crtc_htotal);
+				printk("radeon_crtc->hw_mode.clock: %d\n",
+				       radeon_crtc->hw_mode.clock);
+				printk("radeon_crtc->hw_mode.crtc_vblank_end: %d\n",
+				       radeon_crtc->hw_mode.crtc_vblank_end);
+				printk("radeon_crtc->hw_mode.crtc_vdisplay: %d\n",
+				       radeon_crtc->hw_mode.crtc_vdisplay);
+				printk("radeon_crtc->v_border: %d\n", radeon_crtc->v_border);
+				printk("vblank_time_us: %d\n", vblank_time_us);
+				printk("vblank_lines: %d\n", vblank_lines);
+				printk("line_time_us: %d\n", line_time_us);
 				break;
 			}
 		}