diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c
index 246c4161e627..ee74266b7aa9 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c
@@ -2,6 +2,7 @@
 /*
  * Copyright (c) 2021-2022 Rockchip Electronics Co., Ltd.
  * Copyright (c) 2024 Collabora Ltd.
+ * Copyright (c) 2025 Amazon.com, Inc. or its affiliates.
  *
  * Author: Algea Cao <algea.cao@rock-chips.com>
  * Author: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
@@ -751,6 +752,7 @@ static void dw_hdmi_qp_bridge_atomic_enable(struct drm_bridge *bridge,
 	struct drm_connector_state *conn_state;
 	struct drm_connector *connector;
 	unsigned int op_mode;
+	int ret;
 
 	connector = drm_atomic_get_new_connector_for_encoder(state, bridge->encoder);
 	if (WARN_ON(!connector))
@@ -761,14 +763,20 @@ static void dw_hdmi_qp_bridge_atomic_enable(struct drm_bridge *bridge,
 		return;
 
 	if (connector->display_info.is_hdmi) {
-		dev_dbg(hdmi->dev, "%s mode=HDMI %s rate=%llu bpc=%u\n", __func__,
-			drm_hdmi_connector_get_output_format_name(conn_state->hdmi.output_format),
-			conn_state->hdmi.tmds_char_rate, conn_state->hdmi.output_bpc);
 		op_mode = 0;
 		hdmi->tmds_char_rate = conn_state->hdmi.tmds_char_rate;
+
+		ret = drm_connector_hdmi_enable_scrambling(connector, conn_state);
+		if (ret)
+			dev_warn(hdmi->dev, "Failed to enable scrambling: %d\n", ret);
+
+		dev_dbg(hdmi->dev, "%s mode=HDMI %s rate=%llu bpc=%u scramb=%d\n", __func__,
+			drm_hdmi_connector_get_output_format_name(conn_state->hdmi.output_format),
+			conn_state->hdmi.tmds_char_rate, conn_state->hdmi.output_bpc,
+			connector->hdmi.scrambler_enabled);
 	} else {
-		dev_dbg(hdmi->dev, "%s mode=DVI\n", __func__);
 		op_mode = OPMODE_DVI;
+		dev_dbg(hdmi->dev, "%s mode=DVI\n", __func__);
 	}
 
 	hdmi->phy.ops->init(hdmi, hdmi->phy.data);
@@ -783,9 +791,13 @@ static void dw_hdmi_qp_bridge_atomic_disable(struct drm_bridge *bridge,
 					     struct drm_atomic_commit *state)
 {
 	struct dw_hdmi_qp *hdmi = bridge->driver_private;
+	struct drm_connector *connector;
 
 	hdmi->tmds_char_rate = 0;
 
+	connector = drm_atomic_get_old_connector_for_encoder(state, bridge->encoder);
+	drm_connector_hdmi_disable_scrambling(connector);
+
 	hdmi->phy.ops->disable(hdmi, hdmi->phy.data);
 }
 
@@ -820,24 +832,24 @@ dw_hdmi_qp_bridge_edid_read(struct drm_bridge *bridge,
 	return drm_edid;
 }
 
-static enum drm_mode_status
-dw_hdmi_qp_bridge_tmds_char_rate_valid(const struct drm_bridge *bridge,
-				       const struct drm_display_mode *mode,
-				       unsigned long long rate)
+static int dw_hdmi_qp_bridge_scrambler_enable(struct drm_bridge *bridge)
 {
 	struct dw_hdmi_qp *hdmi = bridge->driver_private;
 
-	/*
-	 * TODO: when hdmi->no_hpd is 1 we must not support modes that
-	 * require scrambling, including every mode with a clock above
-	 * HDMI_1_3_TMDS_CHAR_RATE_MAX_HZ.
-	 */
-	if (rate > HDMI_1_3_TMDS_CHAR_RATE_MAX_HZ) {
-		dev_dbg(hdmi->dev, "Unsupported TMDS char rate: %lld\n", rate);
-		return MODE_CLOCK_HIGH;
-	}
+	dw_hdmi_qp_write(hdmi, 1, SCRAMB_CONFIG0);
+	dev_dbg(hdmi->dev, "scrambler enabled\n");
 
-	return MODE_OK;
+	return 0;
+}
+
+static int dw_hdmi_qp_bridge_scrambler_disable(struct drm_bridge *bridge)
+{
+	struct dw_hdmi_qp *hdmi = bridge->driver_private;
+
+	dw_hdmi_qp_write(hdmi, 0, SCRAMB_CONFIG0);
+	dev_dbg(hdmi->dev, "scrambler disabled\n");
+
+	return 0;
 }
 
 static int dw_hdmi_qp_bridge_clear_avi_infoframe(struct drm_bridge *bridge)
@@ -1213,7 +1225,8 @@ static const struct drm_bridge_funcs dw_hdmi_qp_bridge_funcs = {
 	.hpd_enable = dw_hdmi_qp_bridge_hpd_enable,
 	.hpd_disable = dw_hdmi_qp_bridge_hpd_disable,
 	.edid_read = dw_hdmi_qp_bridge_edid_read,
-	.hdmi_tmds_char_rate_valid = dw_hdmi_qp_bridge_tmds_char_rate_valid,
+	.hdmi_scrambler_enable = dw_hdmi_qp_bridge_scrambler_enable,
+	.hdmi_scrambler_disable = dw_hdmi_qp_bridge_scrambler_disable,
 	.hdmi_clear_avi_infoframe = dw_hdmi_qp_bridge_clear_avi_infoframe,
 	.hdmi_write_avi_infoframe = dw_hdmi_qp_bridge_write_avi_infoframe,
 	.hdmi_clear_hdmi_infoframe = dw_hdmi_qp_bridge_clear_hdmi_infoframe,
@@ -1341,13 +1354,18 @@ struct dw_hdmi_qp *dw_hdmi_qp_bind(struct platform_device *pdev,
 			   DRM_BRIDGE_OP_HDMI_AUDIO |
 			   DRM_BRIDGE_OP_HDMI_HDR_DRM_INFOFRAME |
 			   DRM_BRIDGE_OP_HDMI_SPD_INFOFRAME;
-	if (!hdmi->no_hpd)
-		hdmi->bridge.ops |= DRM_BRIDGE_OP_HPD;
 	hdmi->bridge.of_node = pdev->dev.of_node;
 	hdmi->bridge.type = DRM_MODE_CONNECTOR_HDMIA;
 	hdmi->bridge.vendor = "Synopsys";
 	hdmi->bridge.product = "DW HDMI QP TX";
 
+	if (hdmi->no_hpd) {
+		hdmi->bridge.supported_hdmi_ver = HDMI_VERSION_1_4;
+	} else {
+		hdmi->bridge.supported_hdmi_ver = HDMI_VERSION_2_0;
+		hdmi->bridge.ops |= DRM_BRIDGE_OP_HPD;
+	}
+
 	if (plat_data->supported_formats)
 		hdmi->bridge.supported_formats = plat_data->supported_formats;