drm: omapdrm: displays: Get connector source at connect time

The connector drivers need a handle to the source they are connected to
in order to control the source.

All drivers get that handle at probe time, resulting in probe deferral
when the source hasn't been probed yet. However they don't need the
handle until their connect handler is called.

Move retrieval of the source handle to the connect handler to avoid
probe deferrals.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

1 files changed, 15 insertions, 30 deletions

diff --git a/drivers/gpu/drm/omapdrm/displays/connector-analog-tv.c b/drivers/gpu/drm/omapdrm/displays/connector-analog-tv.c
index e6b87adea933..9eabd7201a12 100644
--- a/drivers/gpu/drm/omapdrm/displays/connector-analog-tv.c
+++ b/drivers/gpu/drm/omapdrm/displays/connector-analog-tv.c
@@ -45,7 +45,7 @@ static const struct videomode tvc_pal_vm = {
 static int tvc_connect(struct omap_dss_device *dssdev)
 {
 	struct panel_drv_data *ddata = to_panel_data(dssdev);
-	struct omap_dss_device *in = ddata->in;
+	struct omap_dss_device *in;
 	int r;
 
 	dev_dbg(ddata->dev, "connect\n");
@@ -53,10 +53,19 @@ static int tvc_connect(struct omap_dss_device *dssdev)
 	if (omapdss_device_is_connected(dssdev))
 		return 0;
 
+	in = omapdss_of_find_source_for_first_ep(ddata->dev->of_node);
+	if (IS_ERR(in)) {
+		dev_err(ddata->dev, "failed to find video source\n");
+		return PTR_ERR(in);
+	}
+
 	r = in->ops.atv->connect(in, dssdev);
-	if (r)
+	if (r) {
+		omap_dss_put_device(in);
 		return r;
+	}
 
+	ddata->in = in;
 	return 0;
 }
 
@@ -71,6 +80,9 @@ static void tvc_disconnect(struct omap_dss_device *dssdev)
 		return;
 
 	in->ops.atv->disconnect(in, dssdev);
+
+	omap_dss_put_device(in);
+	ddata->in = NULL;
 }
 
 static int tvc_enable(struct omap_dss_device *dssdev)
@@ -173,23 +185,6 @@ static struct omap_dss_driver tvc_driver = {
 	.set_wss		= tvc_set_wss,
 };
 
-static int tvc_probe_of(struct platform_device *pdev)
-{
-	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
-	struct device_node *node = pdev->dev.of_node;
-	struct omap_dss_device *in;
-
-	in = omapdss_of_find_source_for_first_ep(node);
-	if (IS_ERR(in)) {
-		dev_err(&pdev->dev, "failed to find video source\n");
-		return PTR_ERR(in);
-	}
-
-	ddata->in = in;
-
-	return 0;
-}
-
 static int tvc_probe(struct platform_device *pdev)
 {
 	struct panel_drv_data *ddata;
@@ -203,10 +198,6 @@ static int tvc_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, ddata);
 	ddata->dev = &pdev->dev;
 
-	r = tvc_probe_of(pdev);
-	if (r)
-		return r;
-
 	ddata->vm = tvc_pal_vm;
 
 	dssdev = &ddata->dssdev;
@@ -219,28 +210,22 @@ static int tvc_probe(struct platform_device *pdev)
 	r = omapdss_register_display(dssdev);
 	if (r) {
 		dev_err(&pdev->dev, "Failed to register panel\n");
-		goto err_reg;
+		return r;
 	}
 
 	return 0;
-err_reg:
-	omap_dss_put_device(ddata->in);
-	return r;
 }
 
 static int __exit tvc_remove(struct platform_device *pdev)
 {
 	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
 	struct omap_dss_device *dssdev = &ddata->dssdev;
-	struct omap_dss_device *in = ddata->in;
 
 	omapdss_unregister_display(&ddata->dssdev);
 
 	tvc_disable(dssdev);
 	tvc_disconnect(dssdev);
 
-	omap_dss_put_device(in);
-
 	return 0;
 }