1 files changed, 8 insertions, 4 deletions

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index b74ccb6a24c2..ab7968c8f6a2 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -1046,6 +1046,10 @@ static bool dw_hdmi_support_scdc(struct dw_hdmi *hdmi)
         if (hdmi->version < 0x200a)
                 return false;
 
+        /* Disable if no DDC bus */
+        if (!hdmi->ddc)
+                return false;
+
         /* Disable if SCDC is not supported, or if an HF-VSDB block is absent */
         if (!display->hdmi.scdc.supported ||
             !display->hdmi.scdc.scrambling.supported)
@@ -1684,13 +1688,13 @@ static void hdmi_av_composer(struct dw_hdmi *hdmi,
                          * Source Devices compliant shall set the
                          * Source Version = 1.
                          */
-                        drm_scdc_readb(&hdmi->i2c->adap, SCDC_SINK_VERSION,
+                        drm_scdc_readb(hdmi->ddc, SCDC_SINK_VERSION,
                                        &bytes);
-                        drm_scdc_writeb(&hdmi->i2c->adap, SCDC_SOURCE_VERSION,
+                        drm_scdc_writeb(hdmi->ddc, SCDC_SOURCE_VERSION,
                                 min_t(u8, bytes, SCDC_MIN_SOURCE_VERSION));
 
                         /* Enabled Scrambling in the Sink */
-                        drm_scdc_set_scrambling(&hdmi->i2c->adap, 1);
+                        drm_scdc_set_scrambling(hdmi->ddc, 1);
 
                         /*
                          * To activate the scrambler feature, you must ensure
@@ -1706,7 +1710,7 @@ static void hdmi_av_composer(struct dw_hdmi *hdmi,
                         hdmi_writeb(hdmi, 0, HDMI_FC_SCRAMBLER_CTRL);
                         hdmi_writeb(hdmi, (u8)~HDMI_MC_SWRSTZ_TMDSSWRST_REQ,
                                     HDMI_MC_SWRSTZ);
-                        drm_scdc_set_scrambling(&hdmi->i2c->adap, 0);
+                        drm_scdc_set_scrambling(hdmi->ddc, 0);
                 }
         }