drm/radeon: only mark audio as connected if the monitor supports it (v3)

Otherwise the driver may try and send audio which may confuse the
monitor.

v2: set pin to NULL if no audio
v3: avoid crash with analog encoders

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

drivers/gpu/drm/radeon/radeon_audio.c

@@ -460,30 +460,33 @@ void radeon_audio_detect(struct drm_connector *connector,
 	if (!connector || !connector->encoder)
 		return;
 
+	if (!radeon_encoder_is_digital(connector->encoder))
+		return;
+
 	rdev = connector->encoder->dev->dev_private;
 	radeon_encoder = to_radeon_encoder(connector->encoder);
 	dig = radeon_encoder->enc_priv;
 
-	if (status == connector_status_connected) {
-		struct radeon_connector *radeon_connector;
-		int sink_type;
-
-		if (!drm_detect_monitor_audio(radeon_connector_edid(connector))) {
-			radeon_encoder->audio = NULL;
-			return;
-		}
+	if (!dig->afmt)
+		return;
 
-		radeon_connector = to_radeon_connector(connector);
-		sink_type = radeon_dp_getsinktype(radeon_connector);
+	if (status == connector_status_connected) {
+		struct radeon_connector *radeon_connector = to_radeon_connector(connector);
 
 		if (connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort &&
-			sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT)
+		    radeon_dp_getsinktype(radeon_connector) ==
+		    CONNECTOR_OBJECT_ID_DISPLAYPORT)
 			radeon_encoder->audio = rdev->audio.dp_funcs;
 		else
 			radeon_encoder->audio = rdev->audio.hdmi_funcs;
 
 		dig->afmt->pin = radeon_audio_get_pin(connector->encoder);
-		radeon_audio_enable(rdev, dig->afmt->pin, 0xf);
+		if (drm_detect_monitor_audio(radeon_connector_edid(connector))) {
+			radeon_audio_enable(rdev, dig->afmt->pin, 0xf);
+		} else {
+			radeon_audio_enable(rdev, dig->afmt->pin, 0);
+			dig->afmt->pin = NULL;
+		}
 	} else {
 		radeon_audio_enable(rdev, dig->afmt->pin, 0);
 		dig->afmt->pin = NULL;

drivers/gpu/drm/radeon/radeon_connectors.c

@@ -1379,8 +1379,10 @@ out:
 	/* updated in get modes as well since we need to know if it's analog or digital */
 	radeon_connector_update_scratch_regs(connector, ret);
 
-	if (radeon_audio != 0)
+	if (radeon_audio != 0) {
+		radeon_connector_get_edid(connector);
 		radeon_audio_detect(connector, ret);
+	}
 
 exit:
 	pm_runtime_mark_last_busy(connector->dev->dev);
@@ -1717,8 +1719,10 @@ radeon_dp_detect(struct drm_connector *connector, bool force)
 
 	radeon_connector_update_scratch_regs(connector, ret);
 
-	if (radeon_audio != 0)
+	if (radeon_audio != 0) {
+		radeon_connector_get_edid(connector);
 		radeon_audio_detect(connector, ret);
+	}
 
 out:
 	pm_runtime_mark_last_busy(connector->dev->dev);