drm: apple: Add oob hotplug event

Signed-off-by: Sven Peter <sven@svenpeter.dev>

Author: svenpeter42

drivers/gpu/drm/apple/apple_drv.c

@@ -189,6 +189,22 @@ apple_connector_detect(struct drm_connector *connector, bool force)
 						  connector_status_disconnected;
 }
 
+static void apple_connector_oob_hotplug(struct drm_connector *connector,
+					enum drm_connector_status status)
+{
+	struct apple_connector *apple_connector = to_apple_connector(connector);
+
+	printk("#### oob_hotplug status:0x%x ####\n", (u32)status);
+
+	if (status == connector_status_connected)
+		dcp_dptx_connect_oob(apple_connector->dcp, 0);
+	else if (status == connector_status_disconnected)
+		dcp_dptx_disconnect_oob(apple_connector->dcp, 0);
+	else
+		dev_err(&apple_connector->dcp->dev, "unexpected connector status"
+			":0x%x in oob_hotplug event\n", (u32)status);
+}
+
 static void apple_crtc_atomic_enable(struct drm_crtc *crtc,
 				     struct drm_atomic_state *state)
 {
@@ -277,6 +293,7 @@ static const struct drm_connector_funcs apple_connector_funcs = {
 	.atomic_destroy_state	= drm_atomic_helper_connector_destroy_state,
 	.detect			= apple_connector_detect,
 	.debugfs_init		= apple_connector_debugfs_init,
+	.oob_hotplug_event	= apple_connector_oob_hotplug,
 };
 
 static const struct drm_connector_helper_funcs apple_connector_helper_funcs = {

drivers/gpu/drm/apple/dcp.c

@@ -397,6 +397,17 @@ static int dcp_dptx_connect(struct apple_dcp *dcp, u32 port)
 	return ret;
 }
 
+int dcp_dptx_connect_oob(struct platform_device *pdev, u32 port)
+{
+	struct apple_dcp *dcp = platform_get_drvdata(pdev);
+	int err = dcp_dptx_connect(dcp, port);
+	if (err < 0)
+		return err;
+	dptxport_set_hpd(dcp->dptxport[port].service, true);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(dcp_dptx_connect_oob);
+
 static int dcp_dptx_disconnect(struct apple_dcp *dcp, u32 port)
 {
 	dev_info(dcp->dev, "%s(port=%d)\n", __func__, port);
@@ -411,6 +422,14 @@ static int dcp_dptx_disconnect(struct apple_dcp *dcp, u32 port)
 	return 0;
 }
 
+int dcp_dptx_disconnect_oob(struct platform_device *pdev, u32 port)
+{
+	struct apple_dcp *dcp = platform_get_drvdata(pdev);
+	dptxport_set_hpd(dcp->dptxport[port].service, false);
+	return dcp_dptx_disconnect(dcp, port);
+}
+EXPORT_SYMBOL_GPL(dcp_dptx_disconnect_oob);
+
 static irqreturn_t dcp_dp2hdmi_hpd(int irq, void *data)
 {
 	struct apple_dcp *dcp = data;

drivers/gpu/drm/apple/dcp.h

@@ -52,6 +52,9 @@ bool dcp_crtc_mode_fixup(struct drm_crtc *crtc,
 void dcp_set_dimensions(struct apple_dcp *dcp);
 void dcp_send_message(struct apple_dcp *dcp, u8 endpoint, u64 message);
 
+int dcp_dptx_connect_oob(struct platform_device *pdev, u32 port);
+int dcp_dptx_disconnect_oob(struct platform_device *pdev, u32 port);
+
 int iomfb_start_rtkit(struct apple_dcp *dcp);
 void iomfb_shutdown(struct apple_dcp *dcp);
 /* rtkit message handler for IOMFB messages */