1 files changed, 14 insertions, 1 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c
index 5764f4d3b4f1..6dd434ad2429 100644
--- a/drivers/gpu/drm/radeon/radeon_display.c
+++ b/drivers/gpu/drm/radeon/radeon_display.c
@@ -1094,6 +1094,18 @@ void radeon_modeset_fini(struct radeon_device *rdev)
         radeon_i2c_fini(rdev);
 }
 
+static bool is_hdtv_mode(struct drm_display_mode *mode)
+{
+        /* try and guess if this is a tv or a monitor */
+        if ((mode->vdisplay == 480 && mode->hdisplay == 720) || /* 480p */
+            (mode->vdisplay == 576) || /* 576p */
+            (mode->vdisplay == 720) || /* 720p */
+            (mode->vdisplay == 1080)) /* 1080p */
+                return true;
+        else
+                return false;
+}
+
 bool radeon_crtc_scaling_mode_fixup(struct drm_crtc *crtc,
                                 struct drm_display_mode *mode,
                                 struct drm_display_mode *adjusted_mode)
@@ -1141,7 +1153,8 @@ bool radeon_crtc_scaling_mode_fixup(struct drm_crtc *crtc,
                         if (ASIC_IS_AVIVO(rdev) &&
                             ((radeon_encoder->underscan_type == UNDERSCAN_ON) ||
                              ((radeon_encoder->underscan_type == UNDERSCAN_AUTO) &&
-                              drm_detect_hdmi_monitor(radeon_connector->edid)))) {
+                              drm_detect_hdmi_monitor(radeon_connector->edid) &&
+                              is_hdtv_mode(mode)))) {
                                 radeon_crtc->h_border = (mode->hdisplay >> 5) + 16;
                                 radeon_crtc->v_border = (mode->vdisplay >> 5) + 16;
                                 radeon_crtc->rmx_type = RMX_FULL;