1 files changed, 19 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index bc0b7aa0ab96..7395f6a389a5 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -9152,6 +9152,23 @@ static void intel_sanitize_encoder(struct intel_encoder *encoder)
          * the crtc fixup. */
 }
 
+static void i915_redisable_vga(struct drm_device *dev)
+{
+        struct drm_i915_private *dev_priv = dev->dev_private;
+        u32 vga_reg;
+
+        if (HAS_PCH_SPLIT(dev))
+                vga_reg = CPU_VGACNTRL;
+        else
+                vga_reg = VGACNTRL;
+
+        if (I915_READ(vga_reg) != VGA_DISP_DISABLE) {
+                DRM_DEBUG_KMS("Something enabled VGA plane, disabling it\n");
+                I915_WRITE(vga_reg, VGA_DISP_DISABLE);
+                POSTING_READ(vga_reg);
+        }
+}
+
 /* Scan out the current hw modeset state, sanitizes it and maps it into the drm
  * and i915 state tracking structures. */
 void intel_modeset_setup_hw_state(struct drm_device *dev,
@@ -9260,6 +9277,8 @@ void intel_modeset_setup_hw_state(struct drm_device *dev,
                         intel_set_mode(&crtc->base, &crtc->base.mode,
                                        crtc->base.x, crtc->base.y, crtc->base.fb);
                 }
+
+                i915_redisable_vga(dev);
         } else {
                 intel_modeset_update_staged_output_state(dev);
         }