diff --git a/drivers/gpu/drm/i915/display/g4x_dp.c b/drivers/gpu/drm/i915/display/g4x_dp.c
index 440fb3002f286..596e926ef0894 100644
--- a/drivers/gpu/drm/i915/display/g4x_dp.c
+++ b/drivers/gpu/drm/i915/display/g4x_dp.c
@@ -1251,6 +1251,7 @@ static void intel_dp_encoder_reset(struct drm_encoder *encoder)
 	intel_dp->DP = intel_de_read(display, intel_dp->output_reg);
 
 	intel_dp->reset_link_params = true;
+	intel_dp_invalidate_source_oui(intel_dp);
 
 	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
 		vlv_pps_pipe_reset(intel_dp);
diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index fe1ded6707f90..465f245a53c48 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -4392,6 +4392,7 @@ static void intel_ddi_encoder_reset(struct drm_encoder *encoder)
 	struct intel_digital_port *dig_port = enc_to_dig_port(to_intel_encoder(encoder));
 
 	intel_dp->reset_link_params = true;
+	intel_dp_invalidate_source_oui(intel_dp);
 
 	intel_pps_encoder_reset(intel_dp);
 
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index 7ff97e5b83dd5..ad84ffa31c97f 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -1757,6 +1757,7 @@ struct intel_dp {
 
 	/* When we last wrote the OUI for eDP */
 	unsigned long last_oui_write;
+	bool oui_valid;
 
 	bool colorimetry_support;
 
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 16dc1d26d2a25..ab6c917052b5c 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -3335,28 +3335,40 @@ void intel_dp_sink_disable_decompression(struct intel_atomic_state *state,
 }
 
 static void
-intel_edp_init_source_oui(struct intel_dp *intel_dp, bool careful)
+intel_dp_init_source_oui(struct intel_dp *intel_dp)
 {
 	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
 	u8 oui[] = { 0x00, 0xaa, 0x01 };
 	u8 buf[3] = {};
 
+	if (!intel_dp_is_edp(intel_dp))
+		return;
+
 	/*
 	 * During driver init, we want to be careful and avoid changing the source OUI if it's
 	 * already set to what we want, so as to avoid clearing any state by accident
 	 */
-	if (careful) {
+	if (!intel_dp->oui_valid) {
 		if (drm_dp_dpcd_read(&intel_dp->aux, DP_SOURCE_OUI, buf, sizeof(buf)) < 0)
 			drm_err(&i915->drm, "Failed to read source OUI\n");
 
 		if (memcmp(oui, buf, sizeof(oui)) == 0)
-			return;
+			intel_dp->oui_valid = true;
 	}
 
+	if (intel_dp->oui_valid)
+		return;
+
 	if (drm_dp_dpcd_write(&intel_dp->aux, DP_SOURCE_OUI, oui, sizeof(oui)) < 0)
 		drm_err(&i915->drm, "Failed to write source OUI\n");
 
 	intel_dp->last_oui_write = jiffies;
+	intel_dp->oui_valid = true;
+}
+
+void intel_dp_invalidate_source_oui(struct intel_dp *intel_dp)
+{
+	intel_dp->oui_valid = false;
 }
 
 void intel_dp_wait_source_oui(struct intel_dp *intel_dp)
@@ -3387,6 +3399,8 @@ void intel_dp_set_power(struct intel_dp *intel_dp, u8 mode)
 		if (downstream_hpd_needs_d0(intel_dp))
 			return;
 
+		intel_dp_invalidate_source_oui(intel_dp);
+
 		ret = drm_dp_dpcd_writeb(&intel_dp->aux, DP_SET_POWER, mode);
 	} else {
 		struct intel_lspcon *lspcon = dp_to_lspcon(intel_dp);
@@ -3394,8 +3408,7 @@ void intel_dp_set_power(struct intel_dp *intel_dp, u8 mode)
 		lspcon_resume(dp_to_dig_port(intel_dp));
 
 		/* Write the source OUI as early as possible */
-		if (intel_dp_is_edp(intel_dp))
-			intel_edp_init_source_oui(intel_dp, false);
+		intel_dp_init_source_oui(intel_dp);
 
 		/*
 		 * When turning on, we need to retry for 1ms to give the sink
@@ -4112,7 +4125,7 @@ intel_edp_init_dpcd(struct intel_dp *intel_dp, struct intel_connector *connector
 	 * If needed, program our source OUI so we can make various Intel-specific AUX services
 	 * available (such as HDR backlight controls)
 	 */
-	intel_edp_init_source_oui(intel_dp, true);
+	intel_dp_init_source_oui(intel_dp);
 
 	return true;
 }
diff --git a/drivers/gpu/drm/i915/display/intel_dp.h b/drivers/gpu/drm/i915/display/intel_dp.h
index 3b869429e5756..0449d1d3f175d 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.h
+++ b/drivers/gpu/drm/i915/display/intel_dp.h
@@ -189,6 +189,7 @@ void intel_dp_check_frl_training(struct intel_dp *intel_dp);
 void intel_dp_pcon_dsc_configure(struct intel_dp *intel_dp,
 				 const struct intel_crtc_state *crtc_state);
 
+void intel_dp_invalidate_source_oui(struct intel_dp *intel_dp);
 void intel_dp_wait_source_oui(struct intel_dp *intel_dp);
 int intel_dp_output_bpp(enum intel_output_format output_format, int bpp);
 
