@@ -3224,11 +3224,14 @@ static void tgl_ddi_pre_enable_dp(struct intel_encoder *encoder,
intel_edp_panel_on(intel_dp);
/*
- * 1.b, 3. and 4. is done before tgl_ddi_pre_enable_dp() by:
+ * 1.b, 3. and 4.a is done before tgl_ddi_pre_enable_dp() by:
* haswell_crtc_enable()->intel_encoders_pre_pll_enable() and
* haswell_crtc_enable()->intel_enable_shared_dpll()
*/
+ /* 4.b */
+ intel_ddi_clk_select(encoder, crtc_state);
+
/* 5. */
if (!intel_phy_is_tc(dev_priv, phy) ||
dig_port->tc_mode != TC_PORT_TBT_ALT)