diff --git a/drivers/gpu/drm/i915/display/intel_backlight.c b/drivers/gpu/drm/i915/display/intel_backlight.c
index a4e4b7f79e4d..cb1e4423decb 100644
--- a/drivers/gpu/drm/i915/display/intel_backlight.c
+++ b/drivers/gpu/drm/i915/display/intel_backlight.c
@@ -1270,6 +1270,10 @@ static int lpt_setup_backlight(struct intel_connector *connector, enum pipe unus
 			       cpu_ctl2 & ~BLM_PWM_ENABLE);
 	}
 
+	drm_dbg_kms(&i915->drm,
+		    "[CONNECTOR:%d:%s] Using native PCH PWM for backlight control\n",
+		    connector->base.base.id, connector->base.name);
+
 	return 0;
 }
 
@@ -1297,6 +1301,10 @@ static int pch_setup_backlight(struct intel_connector *connector, enum pipe unus
 	panel->backlight.pwm_enabled = (cpu_ctl2 & BLM_PWM_ENABLE) &&
 		(pch_ctl1 & BLM_PCH_PWM_ENABLE);
 
+	drm_dbg_kms(&i915->drm,
+		    "[CONNECTOR:%d:%s] Using native PCH PWM for backlight control\n",
+		    connector->base.base.id, connector->base.name);
+
 	return 0;
 }
 
@@ -1335,6 +1343,10 @@ static int i9xx_setup_backlight(struct intel_connector *connector, enum pipe unu
 
 	panel->backlight.pwm_enabled = val != 0;
 
+	drm_dbg_kms(&i915->drm,
+		    "[CONNECTOR:%d:%s] Using native PWM for backlight control\n",
+		    connector->base.base.id, connector->base.name);
+
 	return 0;
 }
 
@@ -1364,6 +1376,10 @@ static int i965_setup_backlight(struct intel_connector *connector, enum pipe unu
 
 	panel->backlight.pwm_enabled = ctl2 & BLM_PWM_ENABLE;
 
+	drm_dbg_kms(&i915->drm,
+		    "[CONNECTOR:%d:%s] Using native PWM for backlight control\n",
+		    connector->base.base.id, connector->base.name);
+
 	return 0;
 }
 
@@ -1392,6 +1408,10 @@ static int vlv_setup_backlight(struct intel_connector *connector, enum pipe pipe
 
 	panel->backlight.pwm_enabled = ctl2 & BLM_PWM_ENABLE;
 
+	drm_dbg_kms(&i915->drm,
+		    "[CONNECTOR:%d:%s] Using native PWM for backlight control (on pipe %c)\n",
+		    connector->base.base.id, connector->base.name, pipe_name(pipe));
+
 	return 0;
 }
 
@@ -1428,6 +1448,11 @@ bxt_setup_backlight(struct intel_connector *connector, enum pipe unused)
 
 	panel->backlight.pwm_enabled = pwm_ctl & BXT_BLC_PWM_ENABLE;
 
+	drm_dbg_kms(&i915->drm,
+		    "[CONNECTOR:%d:%s] Using native PWM for backlight control (controller=%d)\n",
+		    connector->base.base.id, connector->base.name,
+		    panel->backlight.controller);
+
 	return 0;
 }
 
@@ -1490,6 +1515,11 @@ cnp_setup_backlight(struct intel_connector *connector, enum pipe unused)
 
 	panel->backlight.pwm_enabled = pwm_ctl & BXT_BLC_PWM_ENABLE;
 
+	drm_dbg_kms(&i915->drm,
+		    "[CONNECTOR:%d:%s] Using native PCH PWM for backlight control (controller=%d)\n",
+		    connector->base.base.id, connector->base.name,
+		    panel->backlight.controller);
+
 	return 0;
 }
 
@@ -1538,8 +1568,10 @@ static int ext_pwm_setup_backlight(struct intel_connector *connector,
 			NSEC_PER_SEC / get_vbt_pwm_freq(connector);
 	}
 
-	drm_info(&i915->drm, "Using %s PWM for LCD backlight control\n",
-		 desc);
+	drm_dbg_kms(&i915->drm,
+		    "[CONNECTOR:%d:%s] Using %s PWM for backlight control\n",
+		    connector->base.base.id, connector->base.name, desc);
+
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index b92e0b0f5369..717be9a9ef5b 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -5256,11 +5256,6 @@ static void intel_edp_backlight_setup(struct intel_dp *intel_dp,
 
 		if (pipe != PIPE_A && pipe != PIPE_B)
 			pipe = PIPE_A;
-
-		drm_dbg_kms(&i915->drm,
-			    "[CONNECTOR:%d:%s] using pipe %c for initial backlight setup\n",
-			    connector->base.base.id, connector->base.name,
-			    pipe_name(pipe));
 	}
 
 	intel_backlight_setup(connector, pipe);
diff --git a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c
index 83af95bce98d..8670b6956fee 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c
@@ -273,6 +273,11 @@ intel_dp_aux_hdr_disable_backlight(const struct drm_connector_state *conn_state,
 	panel->backlight.pwm_funcs->disable(conn_state, intel_backlight_invert_pwm_level(connector, 0));
 }
 
+static const char *dpcd_vs_pwm_str(bool aux)
+{
+	return aux ? "DPCD" : "PWM";
+}
+
 static int
 intel_dp_aux_hdr_setup_backlight(struct intel_connector *connector, enum pipe pipe)
 {
@@ -282,11 +287,11 @@ intel_dp_aux_hdr_setup_backlight(struct intel_connector *connector, enum pipe pi
 		&connector->base.display_info.luminance_range;
 	int ret;
 
-	if (panel->backlight.edp.intel.sdr_uses_aux) {
-		drm_dbg_kms(&i915->drm, "SDR backlight is controlled through DPCD\n");
-	} else {
-		drm_dbg_kms(&i915->drm, "SDR backlight is controlled through PWM\n");
+	drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s] SDR backlight is controlled through %s\n",
+		    connector->base.base.id, connector->base.name,
+		    dpcd_vs_pwm_str(panel->backlight.edp.intel.sdr_uses_aux));
 
+	if (!panel->backlight.edp.intel.sdr_uses_aux) {
 		ret = panel->backlight.pwm_funcs->setup(connector, pipe);
 		if (ret < 0) {
 			drm_err(&i915->drm,
@@ -303,8 +308,10 @@ intel_dp_aux_hdr_setup_backlight(struct intel_connector *connector, enum pipe pi
 		panel->backlight.min = 0;
 	}
 
-	drm_dbg_kms(&i915->drm, "Using backlight range %d..%d\n", panel->backlight.min,
-		    panel->backlight.max);
+	drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s] Using AUX HDR interface for backlight control (range %d..%d)\n",
+		    connector->base.base.id, connector->base.name,
+		    panel->backlight.min, panel->backlight.max);
+
 
 	panel->backlight.level = intel_dp_aux_hdr_get_backlight(connector, pipe);
 	panel->backlight.enabled = panel->backlight.level != 0;
@@ -386,6 +393,13 @@ static int intel_dp_aux_vesa_setup_backlight(struct intel_connector *connector,
 	if (ret < 0)
 		return ret;
 
+	drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s] AUX VESA backlight enable is controlled through %s\n",
+		    connector->base.base.id, connector->base.name,
+		    dpcd_vs_pwm_str(panel->backlight.edp.vesa.info.aux_enable));
+	drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s] AUX VESA backlight level is controlled through %s\n",
+		    connector->base.base.id, connector->base.name,
+		    dpcd_vs_pwm_str(panel->backlight.edp.vesa.info.aux_set));
+
 	if (!panel->backlight.edp.vesa.info.aux_set || !panel->backlight.edp.vesa.info.aux_enable) {
 		ret = panel->backlight.pwm_funcs->setup(connector, pipe);
 		if (ret < 0) {
@@ -418,6 +432,9 @@ static int intel_dp_aux_vesa_setup_backlight(struct intel_connector *connector,
 		}
 	}
 
+	drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s] Using AUX VESA interface for backlight control\n",
+		    connector->base.base.id, connector->base.name);
+
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/i915/display/intel_dsi_dcs_backlight.c b/drivers/gpu/drm/i915/display/intel_dsi_dcs_backlight.c
index 20e466d843ce..049443245310 100644
--- a/drivers/gpu/drm/i915/display/intel_dsi_dcs_backlight.c
+++ b/drivers/gpu/drm/i915/display/intel_dsi_dcs_backlight.c
@@ -162,6 +162,7 @@ static void dcs_enable_backlight(const struct intel_crtc_state *crtc_state,
 static int dcs_setup_backlight(struct intel_connector *connector,
 			       enum pipe unused)
 {
+	struct drm_i915_private *i915 = to_i915(connector->base.dev);
 	struct intel_panel *panel = &connector->panel;
 
 	if (panel->vbt.backlight.brightness_precision_bits > 8)
@@ -171,6 +172,10 @@ static int dcs_setup_backlight(struct intel_connector *connector,
 
 	panel->backlight.level = panel->backlight.max;
 
+	drm_dbg_kms(&i915->drm,
+		    "[CONNECTOR:%d:%s] Using DCS for backlight control\n",
+		    connector->base.base.id, connector->base.name);
+
 	return 0;
 }