drm/i915/g4x: fix g4x infoframe readout

Need to check the port too.

Reported-by: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index f58e8834ebfb..ec873338e84d 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -170,9 +170,13 @@ static bool g4x_infoframe_enabled(struct drm_encoder *encoder)
 {
         struct drm_device *dev = encoder->dev;
         struct drm_i915_private *dev_priv = dev->dev_private;
+        struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder);
         u32 val = I915_READ(VIDEO_DIP_CTL);
 
-        return val & VIDEO_DIP_ENABLE;
+        if (VIDEO_DIP_PORT(intel_dig_port->port) == (val & VIDEO_DIP_PORT_MASK))
+                return val & VIDEO_DIP_ENABLE;
+
+        return false;
 }
 
 static void ibx_write_infoframe(struct drm_encoder *encoder,