drm/radeon/kms: add support for eDP (embedded DisplayPort)

This is displayport used for internal connections such
as laptop panels and systems with integrated monitors.
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/radeon/atombios_dp.c

@@ -468,7 +468,8 @@ void radeon_dp_set_link_config(struct drm_connector *connector,
 	struct radeon_connector *radeon_connector;
 	struct radeon_connector_atom_dig *dig_connector;
 
-	if (connector->connector_type != DRM_MODE_CONNECTOR_DisplayPort)
+	if ((connector->connector_type != DRM_MODE_CONNECTOR_DisplayPort) ||
+	    (connector->connector_type != DRM_MODE_CONNECTOR_eDP))
 		return;
 
 	radeon_connector = to_radeon_connector(connector);
@@ -582,7 +583,8 @@ void dp_link_train(struct drm_encoder *encoder,
 	u8 train_set[4];
 	int i;
 
-	if (connector->connector_type != DRM_MODE_CONNECTOR_DisplayPort)
+	if ((connector->connector_type != DRM_MODE_CONNECTOR_DisplayPort) ||
+	    (connector->connector_type != DRM_MODE_CONNECTOR_eDP))
 		return;
 
 	if (!radeon_encoder->enc_priv)

drivers/gpu/drm/radeon/radeon_atombios.c

@@ -346,7 +346,9 @@ const int object_connector_convert[] = {
 	DRM_MODE_CONNECTOR_Unknown,
 	DRM_MODE_CONNECTOR_Unknown,
 	DRM_MODE_CONNECTOR_Unknown,
-	DRM_MODE_CONNECTOR_DisplayPort
+	DRM_MODE_CONNECTOR_DisplayPort,
+	DRM_MODE_CONNECTOR_eDP,
+	DRM_MODE_CONNECTOR_Unknown
 };
 
 bool radeon_get_atom_connector_info_from_object_table(struct drm_device *dev)

drivers/gpu/drm/radeon/radeon_connectors.c

@@ -49,8 +49,10 @@ void radeon_connector_hotplug(struct drm_connector *connector)
 	if (radeon_connector->hpd.hpd != RADEON_HPD_NONE)
 		radeon_hpd_set_polarity(rdev, radeon_connector->hpd.hpd);
 
-	if (connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort) {
-		if (radeon_dp_getsinktype(radeon_connector) == CONNECTOR_OBJECT_ID_DISPLAYPORT) {
+	if ((connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort) ||
+	    (connector->connector_type == DRM_MODE_CONNECTOR_eDP)) {
+		if ((radeon_dp_getsinktype(radeon_connector) == CONNECTOR_OBJECT_ID_DISPLAYPORT) ||
+		    (radeon_dp_getsinktype(radeon_connector) == CONNECTOR_OBJECT_ID_eDP)) {
 			if (radeon_dp_needs_link_train(radeon_connector)) {
 				if (connector->encoder)
 					dp_link_train(connector->encoder, connector);
@@ -967,7 +969,8 @@ static enum drm_connector_status radeon_dp_detect(struct drm_connector *connecto
 	}
 
 	sink_type = radeon_dp_getsinktype(radeon_connector);
-	if (sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT) {
+	if ((sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT) ||
+	    (sink_type == CONNECTOR_OBJECT_ID_eDP)) {
 		if (radeon_dp_getdpcd(radeon_connector)) {
 			radeon_dig_connector->dp_sink_type = sink_type;
 			ret = connector_status_connected;
@@ -992,7 +995,8 @@ static int radeon_dp_mode_valid(struct drm_connector *connector,
 
 	/* XXX check mode bandwidth */
 
-	if (radeon_dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT)
+	if ((radeon_dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT) ||
+	    (radeon_dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_eDP))
 		return radeon_dp_mode_valid_helper(radeon_connector, mode);
 	else
 		return MODE_OK;
@@ -1145,6 +1149,7 @@ radeon_add_atom_connector(struct drm_device *dev,
 		subpixel_order = SubPixelHorizontalRGB;
 		break;
 	case DRM_MODE_CONNECTOR_DisplayPort:
+	case DRM_MODE_CONNECTOR_eDP:
 		radeon_dig_connector = kzalloc(sizeof(struct radeon_connector_atom_dig), GFP_KERNEL);
 		if (!radeon_dig_connector)
 			goto failed;
@@ -1157,9 +1162,15 @@ radeon_add_atom_connector(struct drm_device *dev,
 			goto failed;
 		if (i2c_bus->valid) {
 			/* add DP i2c bus */
+			if (connector_type == DRM_MODE_CONNECTOR_eDP)
+				radeon_dig_connector->dp_i2c_bus = radeon_i2c_create_dp(dev, i2c_bus, "eDP-auxch");
+			else
 				radeon_dig_connector->dp_i2c_bus = radeon_i2c_create_dp(dev, i2c_bus, "DP-auxch");
 			if (!radeon_dig_connector->dp_i2c_bus)
 				goto failed;
+			if (connector_type == DRM_MODE_CONNECTOR_eDP)
+				radeon_connector->ddc_bus = radeon_i2c_create(dev, i2c_bus, "eDP");
+			else
 				radeon_connector->ddc_bus = radeon_i2c_create(dev, i2c_bus, "DP");
 			if (!radeon_connector->ddc_bus)
 				goto failed;

drivers/gpu/drm/radeon/radeon_display.c

@@ -234,7 +234,7 @@ static const char *encoder_names[34] = {
 	"INTERNAL_UNIPHY2",
 };
 
-static const char *connector_names[13] = {
+static const char *connector_names[15] = {
 	"Unknown",
 	"VGA",
 	"DVI-I",
@@ -248,6 +248,8 @@ static const char *connector_names[13] = {
 	"DisplayPort",
 	"HDMI-A",
 	"HDMI-B",
+	"TV",
+	"eDP",
 };
 
 static const char *hpd_names[7] = {
@@ -352,7 +354,8 @@ int radeon_ddc_get_modes(struct radeon_connector *radeon_connector)
 {
 	int ret = 0;
 
-	if (radeon_connector->base.connector_type == DRM_MODE_CONNECTOR_DisplayPort) {
+	if ((radeon_connector->base.connector_type == DRM_MODE_CONNECTOR_DisplayPort) ||
+	    (radeon_connector->base.connector_type == DRM_MODE_CONNECTOR_eDP)) {
 		struct radeon_connector_atom_dig *dig = radeon_connector->con_priv;
 		if (dig->dp_i2c_bus)
 			radeon_connector->edid = drm_get_edid(&radeon_connector->base, &dig->dp_i2c_bus->adapter);

drivers/gpu/drm/radeon/radeon_encoders.c

@@ -596,8 +596,10 @@ atombios_get_encoder_mode(struct drm_encoder *encoder)
 		return ATOM_ENCODER_MODE_LVDS;
 		break;
 	case DRM_MODE_CONNECTOR_DisplayPort:
+	case DRM_MODE_CONNECTOR_eDP:
 		radeon_dig_connector = radeon_connector->con_priv;
-		if (radeon_dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT)
+		if ((radeon_dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT) ||
+		    (radeon_dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_eDP))
 			return ATOM_ENCODER_MODE_DP;
 		else if (drm_detect_hdmi_monitor(radeon_connector->edid))
 			return ATOM_ENCODER_MODE_HDMI;