Merge tag 'omapdss-for-3.11-1' of git://gitorious.org/linux-omap-dss2/linux into fbdev/for-next

OMAP display subsystem changes for 3.11 (part 1/2)

This is the first part of OMAP DSS changes for 3.11. This part contains fixes,
cleanups and reorganizations that are not directly related to the new DSS
device model that is added in part 2, although many of the reorganizations are
made to make the part 2 possible.

There should not be any functional changes visible to the user except the few
bug fixes.

The main new internal features:

- Display (dis)connect support, which allows us to explicitly (dis)connect a
  whole display pipeline

- Panel list, which allows us to operate without the specific DSS bus

- Combine omap_dss_output to omap_dss_device, so that we have one generic
  "entity" for display pipeline blocks

1 files changed, 31 insertions, 16 deletions

diff --git a/drivers/video/omap2/dss/manager-sysfs.c b/drivers/video/omap2/dss/manager-sysfs.c
index 9a2fb59b6f89..de7e7b5b1b7c 100644
--- a/drivers/video/omap2/dss/manager-sysfs.c
+++ b/drivers/video/omap2/dss/manager-sysfs.c
@@ -50,6 +50,7 @@ static ssize_t manager_display_store(struct omap_overlay_manager *mgr,
 	int r = 0;
 	size_t len = size;
 	struct omap_dss_device *dssdev = NULL;
+	struct omap_dss_device *old_dssdev;
 
 	int match(struct omap_dss_device *dssdev, void *data)
 	{
@@ -66,32 +67,44 @@ static ssize_t manager_display_store(struct omap_overlay_manager *mgr,
 	if (len > 0 && dssdev == NULL)
 		return -EINVAL;
 
-	if (dssdev)
+	if (dssdev) {
 		DSSDBG("display %s found\n", dssdev->name);
 
-	if (mgr->output) {
-		r = mgr->unset_output(mgr);
-		if (r) {
-			DSSERR("failed to unset current output\n");
+		if (omapdss_device_is_connected(dssdev)) {
+			DSSERR("new display is already connected\n");
+			r = -EINVAL;
+			goto put_device;
+		}
+
+		if (omapdss_device_is_enabled(dssdev)) {
+			DSSERR("new display is not disabled\n");
+			r = -EINVAL;
 			goto put_device;
 		}
 	}
 
-	if (dssdev) {
-		struct omap_dss_output *out = dssdev->output;
-
-		/*
-		 * a registered device should have an output connected to it
-		 * already
-		 */
-		if (!out) {
-			DSSERR("device has no output connected to it\n");
+	old_dssdev = mgr->get_device(mgr);
+	if (old_dssdev) {
+		if (omapdss_device_is_enabled(old_dssdev)) {
+			DSSERR("old display is not disabled\n");
+			r = -EINVAL;
 			goto put_device;
 		}
 
-		r = mgr->set_output(mgr, out);
+		old_dssdev->driver->disconnect(old_dssdev);
+	}
+
+	if (dssdev) {
+		r = dssdev->driver->connect(dssdev);
 		if (r) {
-			DSSERR("failed to set manager output\n");
+			DSSERR("failed to connect new device\n");
+			goto put_device;
+		}
+
+		old_dssdev = mgr->get_device(mgr);
+		if (old_dssdev != dssdev) {
+			DSSERR("failed to connect device to this manager\n");
+			dssdev->driver->disconnect(dssdev);
 			goto put_device;
 		}
 
@@ -509,4 +522,6 @@ void dss_manager_kobj_uninit(struct omap_overlay_manager *mgr)
 {
 	kobject_del(&mgr->kobj);
 	kobject_put(&mgr->kobj);
+
+	memset(&mgr->kobj, 0, sizeof(mgr->kobj));
 }