Merge tag 'omapdrm-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux into drm-next

omapdrm patches for v4.17

* Fix sparse warnings from omapdrm
* HPD support for DVI connector
* Big cleanup to remove static variables

* tag 'omapdrm-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux: (69 commits)
  drm/omap: fix compile error when DPI is disabled
  drm/omap: fix compile error when debugfs is disabled
  drm: omapdrm: displays: panel-dsi-cm: Fix field access before set
  drm/omap: cleanup color space conversion
  drm/omap: Allow HDMI audio setup even if we do not have video configured
  drm/omap: fix maximum sizes
  drm/omap: add writeback funcs to dispc_ops
  drm/omap: fix scaling limits for WB
  drm/omap: fix WB height with interlace
  drm/omap: fix WBDELAYCOUNT with interlace
  drm/omap: fix WBDELAYCOUNT for HDMI
  drm/omap: set WB channel-in in wb_setup()
  drm/omap: Add pclk setting case when channel is DSS_WB
  drm/omap: dispc: disp_wb_setup to check return code
  drm/omap: remove leftover enums
  dt-bindings: display: add HPD gpio to DVI connector
  drm/omap: add HPD support to connector-dvi
  drm/omap: Init fbdev emulation only when we have displays
  drm/omap: cleanup fbdev init/free
  drm/omap: fix omap_fbdev_free() when omap_fbdev_create() wasn't called
  ...

Documentation/devicetree/bindings/display/connector/dvi-connector.txt

@@ -10,6 +10,7 @@ Optional properties:
 - analog: the connector has DVI analog pins
 - digital: the connector has DVI digital pins
 - dual-link: the connector has pins for DVI dual-link
+- hpd-gpios: HPD GPIO number
 
 Required nodes:
 - Video port for DVI input

drivers/gpu/drm/omapdrm/displays/connector-analog-tv.c

@@ -40,14 +40,12 @@ static const struct videomode tvc_pal_vm = {
 			  DISPLAY_FLAGS_VSYNC_LOW,
 };
 
-static const struct of_device_id tvc_of_match[];
-
 #define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev)
 
 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");
@@ -55,10 +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;
 }
 
@@ -73,6 +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)
@@ -175,32 +185,12 @@ 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;
 	struct omap_dss_device *dssdev;
 	int r;
 
-	if (!pdev->dev.of_node)
-		return -ENODEV;
-
 	ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
 	if (!ddata)
 		return -ENOMEM;
@@ -208,10 +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;
@@ -224,28 +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;
 }
 

drivers/gpu/drm/omapdrm/displays/connector-dvi.c

@@ -9,6 +9,7 @@
  * the Free Software Foundation.
  */
 
+#include <linux/gpio/consumer.h>
 #include <linux/i2c.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
@@ -44,6 +45,14 @@ struct panel_drv_data {
 	struct videomode vm;
 
 	struct i2c_adapter *i2c_adapter;
+
+	struct gpio_desc *hpd_gpio;
+
+	void (*hpd_cb)(void *cb_data, enum drm_connector_status status);
+	void *hpd_cb_data;
+	bool hpd_enabled;
+	/* mutex for hpd fields above */
+	struct mutex hpd_lock;
 };
 
 #define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev)
@@ -51,16 +60,25 @@ struct panel_drv_data {
 static int dvic_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;
 
 	if (omapdss_device_is_connected(dssdev))
 		return 0;
 
+	in = omapdss_of_find_source_for_first_ep(dssdev->dev->of_node);
+	if (IS_ERR(in)) {
+		dev_err(dssdev->dev, "failed to find video source\n");
+		return PTR_ERR(in);
+	}
+
 	r = in->ops.dvi->connect(in, dssdev);
-	if (r)
+	if (r) {
+		omap_dss_put_device(in);
 		return r;
+	}
 
+	ddata->in = in;
 	return 0;
 }
 
@@ -73,6 +91,9 @@ static void dvic_disconnect(struct omap_dss_device *dssdev)
 		return;
 
 	in->ops.dvi->disconnect(in, dssdev);
+
+	omap_dss_put_device(in);
+	ddata->in = NULL;
 }
 
 static int dvic_enable(struct omap_dss_device *dssdev)
@@ -177,6 +198,9 @@ static int dvic_read_edid(struct omap_dss_device *dssdev,
 	struct panel_drv_data *ddata = to_panel_data(dssdev);
 	int r, l, bytes_read;
 
+	if (ddata->hpd_gpio && !gpiod_get_value_cansleep(ddata->hpd_gpio))
+		return -ENODEV;
+
 	if (!ddata->i2c_adapter)
 		return -ENODEV;
 
@@ -208,6 +232,9 @@ static bool dvic_detect(struct omap_dss_device *dssdev)
 	unsigned char out;
 	int r;
 
+	if (ddata->hpd_gpio)
+		return gpiod_get_value_cansleep(ddata->hpd_gpio);
+
 	if (!ddata->i2c_adapter)
 		return true;
 
@@ -216,6 +243,60 @@ static bool dvic_detect(struct omap_dss_device *dssdev)
 	return r == 0;
 }
 
+static int dvic_register_hpd_cb(struct omap_dss_device *dssdev,
+				 void (*cb)(void *cb_data,
+					    enum drm_connector_status status),
+				 void *cb_data)
+{
+	struct panel_drv_data *ddata = to_panel_data(dssdev);
+
+	if (!ddata->hpd_gpio)
+		return -ENOTSUPP;
+
+	mutex_lock(&ddata->hpd_lock);
+	ddata->hpd_cb = cb;
+	ddata->hpd_cb_data = cb_data;
+	mutex_unlock(&ddata->hpd_lock);
+	return 0;
+}
+
+static void dvic_unregister_hpd_cb(struct omap_dss_device *dssdev)
+{
+	struct panel_drv_data *ddata = to_panel_data(dssdev);
+
+	if (!ddata->hpd_gpio)
+		return;
+
+	mutex_lock(&ddata->hpd_lock);
+	ddata->hpd_cb = NULL;
+	ddata->hpd_cb_data = NULL;
+	mutex_unlock(&ddata->hpd_lock);
+}
+
+static void dvic_enable_hpd(struct omap_dss_device *dssdev)
+{
+	struct panel_drv_data *ddata = to_panel_data(dssdev);
+
+	if (!ddata->hpd_gpio)
+		return;
+
+	mutex_lock(&ddata->hpd_lock);
+	ddata->hpd_enabled = true;
+	mutex_unlock(&ddata->hpd_lock);
+}
+
+static void dvic_disable_hpd(struct omap_dss_device *dssdev)
+{
+	struct panel_drv_data *ddata = to_panel_data(dssdev);
+
+	if (!ddata->hpd_gpio)
+		return;
+
+	mutex_lock(&ddata->hpd_lock);
+	ddata->hpd_enabled = false;
+	mutex_unlock(&ddata->hpd_lock);
+}
+
 static struct omap_dss_driver dvic_driver = {
 	.connect	= dvic_connect,
 	.disconnect	= dvic_disconnect,
@@ -229,23 +310,60 @@ static struct omap_dss_driver dvic_driver = {
 
 	.read_edid	= dvic_read_edid,
 	.detect		= dvic_detect,
+
+	.register_hpd_cb	= dvic_register_hpd_cb,
+	.unregister_hpd_cb	= dvic_unregister_hpd_cb,
+	.enable_hpd		= dvic_enable_hpd,
+	.disable_hpd		= dvic_disable_hpd,
 };
 
+static irqreturn_t dvic_hpd_isr(int irq, void *data)
+{
+	struct panel_drv_data *ddata = data;
+
+	mutex_lock(&ddata->hpd_lock);
+	if (ddata->hpd_enabled && ddata->hpd_cb) {
+		enum drm_connector_status status;
+
+		if (dvic_detect(&ddata->dssdev))
+			status = connector_status_connected;
+		else
+			status = connector_status_disconnected;
+
+		ddata->hpd_cb(ddata->hpd_cb_data, status);
+	}
+	mutex_unlock(&ddata->hpd_lock);
+
+	return IRQ_HANDLED;
+}
+
 static int dvic_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;
 	struct device_node *adapter_node;
 	struct i2c_adapter *adapter;
+	struct gpio_desc *gpio;
+	int r;
 
-	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);
+	gpio = devm_gpiod_get_optional(&pdev->dev, "hpd", GPIOD_IN);
+	if (IS_ERR(gpio)) {
+		dev_err(&pdev->dev, "failed to parse HPD gpio\n");
+		return PTR_ERR(gpio);
 	}
 
-	ddata->in = in;
+	ddata->hpd_gpio = gpio;
+
+	mutex_init(&ddata->hpd_lock);
+
+	if (ddata->hpd_gpio) {
+		r = devm_request_threaded_irq(&pdev->dev,
+			gpiod_to_irq(ddata->hpd_gpio), NULL, dvic_hpd_isr,
+			IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+			"DVI HPD", ddata);
+		if (r)
+			return r;
+	}
 
 	adapter_node = of_parse_phandle(node, "ddc-i2c-bus", 0);
 	if (adapter_node) {
@@ -253,7 +371,6 @@ static int dvic_probe_of(struct platform_device *pdev)
 		of_node_put(adapter_node);
 		if (adapter == NULL) {
 			dev_err(&pdev->dev, "failed to parse ddc-i2c-bus\n");
-			omap_dss_put_device(ddata->in);
 			return -EPROBE_DEFER;
 		}
 
@@ -275,9 +392,6 @@ static int dvic_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, ddata);
 
-	if (!pdev->dev.of_node)
-		return -ENODEV;
-
 	r = dvic_probe_of(pdev);
 	if (r)
 		return r;
@@ -300,9 +414,8 @@ static int dvic_probe(struct platform_device *pdev)
 	return 0;
 
 err_reg:
-	omap_dss_put_device(ddata->in);
-
 	i2c_put_adapter(ddata->i2c_adapter);
+	mutex_destroy(&ddata->hpd_lock);
 
 	return r;
 }
@@ -311,17 +424,16 @@ static int __exit dvic_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);
 
 	dvic_disable(dssdev);
 	dvic_disconnect(dssdev);
 
-	omap_dss_put_device(in);
-
 	i2c_put_adapter(ddata->i2c_adapter);
 
+	mutex_destroy(&ddata->hpd_lock);
+
 	return 0;
 }
 

drivers/gpu/drm/omapdrm/displays/connector-hdmi.c

@@ -55,7 +55,7 @@ struct panel_drv_data {
 static int hdmic_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");
@@ -63,10 +63,19 @@ static int hdmic_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.hdmi->connect(in, dssdev);
-	if (r)
+	if (r) {
+		omap_dss_put_device(in);
 		return r;
+	}
 
+	ddata->in = in;
 	return 0;
 }
 
@@ -81,6 +90,9 @@ static void hdmic_disconnect(struct omap_dss_device *dssdev)
 		return;
 
 	in->ops.hdmi->disconnect(in, dssdev);
+
+	omap_dss_put_device(in);
+	ddata->in = NULL;
 }
 
 static int hdmic_enable(struct omap_dss_device *dssdev)
@@ -302,7 +314,6 @@ static int hdmic_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;
 	int gpio;
 
 	/* HPD GPIO */
@@ -312,14 +323,6 @@ static int hdmic_probe_of(struct platform_device *pdev)
 	else
 		ddata->hpd_gpio = -ENODEV;
 
-	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;
 }
 
@@ -336,9 +339,6 @@ static int hdmic_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, ddata);
 	ddata->dev = &pdev->dev;
 
-	if (!pdev->dev.of_node)
-		return -ENODEV;
-
 	r = hdmic_probe_of(pdev);
 	if (r)
 		return r;
@@ -349,7 +349,7 @@ static int hdmic_probe(struct platform_device *pdev)
 		r = devm_gpio_request_one(&pdev->dev, ddata->hpd_gpio,
 				GPIOF_DIR_IN, "hdmi_hpd");
 		if (r)
-			goto err_reg;
+			return r;
 
 		r = devm_request_threaded_irq(&pdev->dev,
 				gpio_to_irq(ddata->hpd_gpio),
@@ -358,7 +358,7 @@ static int hdmic_probe(struct platform_device *pdev)
 				IRQF_ONESHOT,
 				"hdmic hpd", ddata);
 		if (r)
-			goto err_reg;
+			return r;
 	}
 
 	ddata->vm = hdmic_default_vm;
@@ -373,28 +373,22 @@ static int hdmic_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 hdmic_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);
 
 	hdmic_disable(dssdev);
 	hdmic_disconnect(dssdev);
 
-	omap_dss_put_device(in);
-
 	return 0;
 }
 

drivers/gpu/drm/omapdrm/displays/encoder-opa362.c

@@ -36,7 +36,7 @@ static int opa362_connect(struct omap_dss_device *dssdev,
 		struct omap_dss_device *dst)
 {
 	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(dssdev->dev, "connect\n");
@@ -44,13 +44,22 @@ static int opa362_connect(struct omap_dss_device *dssdev,
 	if (omapdss_device_is_connected(dssdev))
 		return -EBUSY;
 
+	in = omapdss_of_find_source_for_first_ep(dssdev->dev->of_node);
+	if (IS_ERR(in)) {
+		dev_err(dssdev->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;
+	}
 
 	dst->src = dssdev;
 	dssdev->dst = dst;
 
+	ddata->in = in;
 	return 0;
 }
 
@@ -74,6 +83,9 @@ static void opa362_disconnect(struct omap_dss_device *dssdev,
 	dssdev->dst = NULL;
 
 	in->ops.atv->disconnect(in, &ddata->dssdev);
+
+	omap_dss_put_device(in);
+	ddata->in = NULL;
 }
 
 static int opa362_enable(struct omap_dss_device *dssdev)
@@ -171,19 +183,13 @@ static const struct omapdss_atv_ops opa362_atv_ops = {
 
 static int opa362_probe(struct platform_device *pdev)
 {
-	struct device_node *node = pdev->dev.of_node;
 	struct panel_drv_data *ddata;
-	struct omap_dss_device *dssdev, *in;
+	struct omap_dss_device *dssdev;
 	struct gpio_desc *gpio;
 	int r;
 
 	dev_dbg(&pdev->dev, "probe\n");
 
-	if (node == NULL) {
-		dev_err(&pdev->dev, "Unable to find device tree\n");
-		return -EINVAL;
-	}
-
 	ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
 	if (!ddata)
 		return -ENOMEM;
@@ -196,14 +202,6 @@ static int opa362_probe(struct platform_device *pdev)
 
 	ddata->enable_gpio = gpio;
 
-	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;
-
 	dssdev = &ddata->dssdev;
 	dssdev->ops.atv = &opa362_atv_ops;
 	dssdev->dev = &pdev->dev;
@@ -214,20 +212,16 @@ static int opa362_probe(struct platform_device *pdev)
 	r = omapdss_register_output(dssdev);
 	if (r) {
 		dev_err(&pdev->dev, "Failed to register output\n");
-		goto err_reg;
+		return r;
 	}
 
 	return 0;
-err_reg:
-	omap_dss_put_device(ddata->in);
-	return r;
 }
 
 static int __exit opa362_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_output(&ddata->dssdev);
 
@@ -239,8 +233,6 @@ static int __exit opa362_remove(struct platform_device *pdev)
 	if (omapdss_device_is_connected(dssdev))
 		opa362_disconnect(dssdev, dssdev->dst);
 
-	omap_dss_put_device(in);
-
 	return 0;
 }
 

drivers/gpu/drm/omapdrm/displays/encoder-tfp410.c

@@ -32,19 +32,28 @@ static int tfp410_connect(struct omap_dss_device *dssdev,
 		struct omap_dss_device *dst)
 {
 	struct panel_drv_data *ddata = to_panel_data(dssdev);
-	struct omap_dss_device *in = ddata->in;
+	struct omap_dss_device *in;
 	int r;
 
 	if (omapdss_device_is_connected(dssdev))
 		return -EBUSY;
 
+	in = omapdss_of_find_source_for_first_ep(dssdev->dev->of_node);
+	if (IS_ERR(in)) {
+		dev_err(dssdev->dev, "failed to find video source\n");
+		return PTR_ERR(in);
+	}
+
 	r = in->ops.dpi->connect(in, dssdev);
-	if (r)
+	if (r) {
+		omap_dss_put_device(in);
 		return r;
+	}
 
 	dst->src = dssdev;
 	dssdev->dst = dst;
 
+	ddata->in = in;
 	return 0;
 }
 
@@ -66,6 +75,9 @@ static void tfp410_disconnect(struct omap_dss_device *dssdev,
 	dssdev->dst = NULL;
 
 	in->ops.dpi->disconnect(in, &ddata->dssdev);
+
+	omap_dss_put_device(in);
+	ddata->in = NULL;
 }
 
 static int tfp410_enable(struct omap_dss_device *dssdev)
@@ -165,7 +177,6 @@ static int tfp410_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;
 	int gpio;
 
 	gpio = of_get_named_gpio(node, "powerdown-gpios", 0);
@@ -178,14 +189,6 @@ static int tfp410_probe_of(struct platform_device *pdev)
 		return gpio;
 	}
 
-	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;
 }
 
@@ -201,9 +204,6 @@ static int tfp410_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, ddata);
 
-	if (!pdev->dev.of_node)
-		return -ENODEV;
-
 	r = tfp410_probe_of(pdev);
 	if (r)
 		return r;
@@ -214,7 +214,7 @@ static int tfp410_probe(struct platform_device *pdev)
 		if (r) {
 			dev_err(&pdev->dev, "Failed to request PD GPIO %d\n",
 					ddata->pd_gpio);
-			goto err_gpio;
+			return r;
 		}
 	}
 
@@ -229,21 +229,16 @@ static int tfp410_probe(struct platform_device *pdev)
 	r = omapdss_register_output(dssdev);
 	if (r) {
 		dev_err(&pdev->dev, "Failed to register output\n");
-		goto err_reg;
+		return r;
 	}
 
 	return 0;
-err_reg:
-err_gpio:
-	omap_dss_put_device(ddata->in);
-	return r;
 }
 
 static int __exit tfp410_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_output(&ddata->dssdev);
 
@@ -255,8 +250,6 @@ static int __exit tfp410_remove(struct platform_device *pdev)
 	if (omapdss_device_is_connected(dssdev))
 		tfp410_disconnect(dssdev, dssdev->dst);
 
-	omap_dss_put_device(in);
-
 	return 0;
 }
 

drivers/gpu/drm/omapdrm/displays/encoder-tpd12s015.c

@@ -40,12 +40,20 @@ static int tpd_connect(struct omap_dss_device *dssdev,
 		struct omap_dss_device *dst)
 {
 	struct panel_drv_data *ddata = to_panel_data(dssdev);
-	struct omap_dss_device *in = ddata->in;
+	struct omap_dss_device *in;
 	int r;
 
+	in = omapdss_of_find_source_for_first_ep(dssdev->dev->of_node);
+	if (IS_ERR(in)) {
+		dev_err(dssdev->dev, "failed to find video source\n");
+		return PTR_ERR(in);
+	}
+
 	r = in->ops.hdmi->connect(in, dssdev);
-	if (r)
+	if (r) {
+		omap_dss_put_device(in);
 		return r;
+	}
 
 	dst->src = dssdev;
 	dssdev->dst = dst;
@@ -56,6 +64,7 @@ static int tpd_connect(struct omap_dss_device *dssdev,
 	/* DC-DC converter needs at max 300us to get to 90% of 5V */
 	udelay(300);
 
+	ddata->in = in;
 	return 0;
 }
 
@@ -77,6 +86,9 @@ static void tpd_disconnect(struct omap_dss_device *dssdev,
 	dssdev->dst = NULL;
 
 	in->ops.hdmi->disconnect(in, &ddata->dssdev);
+
+	omap_dss_put_device(in);
+	ddata->in = NULL;
 }
 
 static int tpd_enable(struct omap_dss_device *dssdev)
@@ -269,23 +281,6 @@ static irqreturn_t tpd_hpd_isr(int irq, void *data)
 	return IRQ_HANDLED;
 }
 
-static int tpd_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 tpd_probe(struct platform_device *pdev)
 {
 	struct omap_dss_device *in, *dssdev;
@@ -299,37 +294,24 @@ static int tpd_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, ddata);
 
-	if (!pdev->dev.of_node)
-		return -ENODEV;
-
-	r = tpd_probe_of(pdev);
-	if (r)
-		return r;
-
 	gpio = devm_gpiod_get_index_optional(&pdev->dev, NULL, 0,
 		 GPIOD_OUT_LOW);
-	if (IS_ERR(gpio)) {
-		r = PTR_ERR(gpio);
-		goto err_gpio;
-	}
+	if (IS_ERR(gpio))
+		return PTR_ERR(gpio);
 
 	ddata->ct_cp_hpd_gpio = gpio;
 
 	gpio = devm_gpiod_get_index_optional(&pdev->dev, NULL, 1,
 		 GPIOD_OUT_LOW);
-	if (IS_ERR(gpio)) {
-		r = PTR_ERR(gpio);
-		goto err_gpio;
-	}
+	if (IS_ERR(gpio))
+		return PTR_ERR(gpio);
 
 	ddata->ls_oe_gpio = gpio;
 
 	gpio = devm_gpiod_get_index(&pdev->dev, NULL, 2,
 		GPIOD_IN);
-	if (IS_ERR(gpio)) {
-		r = PTR_ERR(gpio);
-		goto err_gpio;
-	}
+	if (IS_ERR(gpio))
+		return PTR_ERR(gpio);
 
 	ddata->hpd_gpio = gpio;
 
@@ -340,7 +322,7 @@ static int tpd_probe(struct platform_device *pdev)
 		IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
 		"tpd12s015 hpd", ddata);
 	if (r)
-		goto err_gpio;
+		return r;
 
 	dssdev = &ddata->dssdev;
 	dssdev->ops.hdmi = &tpd_hdmi_ops;
@@ -355,21 +337,16 @@ static int tpd_probe(struct platform_device *pdev)
 	r = omapdss_register_output(dssdev);
 	if (r) {
 		dev_err(&pdev->dev, "Failed to register output\n");
-		goto err_reg;
+		return r;
 	}
 
 	return 0;
-err_reg:
-err_gpio:
-	omap_dss_put_device(ddata->in);
-	return r;
 }
 
 static int __exit tpd_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_output(&ddata->dssdev);
 
@@ -381,8 +358,6 @@ static int __exit tpd_remove(struct platform_device *pdev)
 	if (omapdss_device_is_connected(dssdev))
 		tpd_disconnect(dssdev, dssdev->dst);
 
-	omap_dss_put_device(in);
-
 	return 0;
 }
 

drivers/gpu/drm/omapdrm/displays/panel-dpi.c

@@ -38,16 +38,25 @@ struct panel_drv_data {
 static int panel_dpi_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;
 
 	if (omapdss_device_is_connected(dssdev))
 		return 0;
 
+	in = omapdss_of_find_source_for_first_ep(dssdev->dev->of_node);
+	if (IS_ERR(in)) {
+		dev_err(dssdev->dev, "failed to find video source\n");
+		return PTR_ERR(in);
+	}
+
 	r = in->ops.dpi->connect(in, dssdev);
-	if (r)
+	if (r) {
+		omap_dss_put_device(in);
 		return r;
+	}
 
+	ddata->in = in;
 	return 0;
 }
 
@@ -60,6 +69,9 @@ static void panel_dpi_disconnect(struct omap_dss_device *dssdev)
 		return;
 
 	in->ops.dpi->disconnect(in, dssdev);
+
+	omap_dss_put_device(in);
+	ddata->in = NULL;
 }
 
 static int panel_dpi_enable(struct omap_dss_device *dssdev)
@@ -157,7 +169,6 @@ static int panel_dpi_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;
 	int r;
 	struct display_timing timing;
 	struct gpio_desc *gpio;
@@ -195,14 +206,6 @@ static int panel_dpi_probe_of(struct platform_device *pdev)
 
 	videomode_from_timing(&timing, &ddata->vm);
 
-	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;
 }
 
@@ -212,9 +215,6 @@ static int panel_dpi_probe(struct platform_device *pdev)
 	struct omap_dss_device *dssdev;
 	int r;
 
-	if (!pdev->dev.of_node)
-		return -ENODEV;
-
 	ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
 	if (ddata == NULL)
 		return -ENOMEM;
@@ -235,29 +235,22 @@ static int panel_dpi_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 panel_dpi_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(dssdev);
 
 	panel_dpi_disable(dssdev);
 	panel_dpi_disconnect(dssdev);
 
-	omap_dss_put_device(in);
-
 	return 0;
 }
 

drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c

@@ -86,7 +86,7 @@ struct panel_drv_data {
 	struct workqueue_struct *workqueue;
 
 	bool ulps_enabled;
-	unsigned ulps_timeout;
+	unsigned int ulps_timeout;
 	struct delayed_work ulps_work;
 };
 
@@ -513,7 +513,7 @@ static ssize_t dsicm_show_ulps(struct device *dev,
 {
 	struct platform_device *pdev = to_platform_device(dev);
 	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
-	unsigned t;
+	unsigned int t;
 
 	mutex_lock(&ddata->lock);
 	t = ddata->ulps_enabled;
@@ -560,7 +560,7 @@ static ssize_t dsicm_show_ulps_timeout(struct device *dev,
 {
 	struct platform_device *pdev = to_platform_device(dev);
 	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
-	unsigned t;
+	unsigned int t;
 
 	mutex_lock(&ddata->lock);
 	t = ddata->ulps_timeout;
@@ -759,37 +759,46 @@ static int dsicm_panel_reset(struct panel_drv_data *ddata)
 static int dsicm_connect(struct omap_dss_device *dssdev)
 {
 	struct panel_drv_data *ddata = to_panel_data(dssdev);
-	struct omap_dss_device *in = ddata->in;
 	struct device *dev = &ddata->pdev->dev;
+	struct omap_dss_device *in;
 	int r;
 
 	if (omapdss_device_is_connected(dssdev))
 		return 0;
 
+	in = omapdss_of_find_source_for_first_ep(dssdev->dev->of_node);
+	if (IS_ERR(in)) {
+		dev_err(dssdev->dev, "failed to find video source\n");
+		return PTR_ERR(in);
+	}
+
 	r = in->ops.dsi->connect(in, dssdev);
 	if (r) {
 		dev_err(dev, "Failed to connect to video source\n");
-		return r;
+		goto err_connect;
 	}
 
-	r = in->ops.dsi->request_vc(ddata->in, &ddata->channel);
+	r = in->ops.dsi->request_vc(in, &ddata->channel);
 	if (r) {
 		dev_err(dev, "failed to get virtual channel\n");
 		goto err_req_vc;
 	}
 
-	r = in->ops.dsi->set_vc_id(ddata->in, ddata->channel, TCH);
+	r = in->ops.dsi->set_vc_id(in, ddata->channel, TCH);
 	if (r) {
 		dev_err(dev, "failed to set VC_ID\n");
 		goto err_vc_id;
 	}
 
+	ddata->in = in;
 	return 0;
 
 err_vc_id:
-	in->ops.dsi->release_vc(ddata->in, ddata->channel);
+	in->ops.dsi->release_vc(in, ddata->channel);
 err_req_vc:
 	in->ops.dsi->disconnect(in, dssdev);
+err_connect:
+	omap_dss_put_device(in);
 	return r;
 }
 
@@ -803,6 +812,9 @@ static void dsicm_disconnect(struct omap_dss_device *dssdev)
 
 	in->ops.dsi->release_vc(in, ddata->channel);
 	in->ops.dsi->disconnect(in, dssdev);
+
+	omap_dss_put_device(in);
+	ddata->in = NULL;
 }
 
 static int dsicm_enable(struct omap_dss_device *dssdev)
@@ -1064,7 +1076,7 @@ static int dsicm_memory_read(struct omap_dss_device *dssdev,
 	int r;
 	int first = 1;
 	int plen;
-	unsigned buf_used = 0;
+	unsigned int buf_used = 0;
 
 	if (size < w * h * 3)
 		return -ENOMEM;
@@ -1223,7 +1235,6 @@ static int dsicm_probe_of(struct platform_device *pdev)
 	struct device_node *node = pdev->dev.of_node;
 	struct device_node *backlight;
 	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
-	struct omap_dss_device *in;
 	struct display_timing timing;
 	int err;
 
@@ -1259,12 +1270,6 @@ static int dsicm_probe_of(struct platform_device *pdev)
 	ddata->height_mm = 0;
 	of_property_read_u32(node, "height-mm", &ddata->height_mm);
 
-	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->vpnl = devm_regulator_get_optional(&pdev->dev, "vpnl");
 	if (IS_ERR(ddata->vpnl)) {
 		err = PTR_ERR(ddata->vpnl);
@@ -1281,8 +1286,6 @@ static int dsicm_probe_of(struct platform_device *pdev)
 		ddata->vddi = NULL;
 	}
 
-	ddata->in = in;
-
 	backlight = of_parse_phandle(node, "backlight", 0);
 	if (backlight) {
 		ddata->extbldev = of_find_backlight_by_node(backlight);
@@ -1317,9 +1320,6 @@ static int dsicm_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, ddata);
 	ddata->pdev = pdev;
 
-	if (!pdev->dev.of_node)
-		return -ENODEV;
-
 	ddata->vm.hactive = 864;
 	ddata->vm.vactive = 480;
 	ddata->vm.pixelclock = 864 * 480 * 60;
@@ -1424,8 +1424,6 @@ static int __exit dsicm_remove(struct platform_device *pdev)
 	if (ddata->extbldev)
 		put_device(&ddata->extbldev->dev);
 
-	omap_dss_put_device(ddata->in);
-
 	dsicm_cancel_ulps_work(ddata);
 	destroy_workqueue(ddata->workqueue);
 

drivers/gpu/drm/omapdrm/displays/panel-lgphilips-lb035q02.c

@@ -119,18 +119,27 @@ static void init_lb035q02_panel(struct spi_device *spi)
 static int lb035q02_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;
 
 	if (omapdss_device_is_connected(dssdev))
 		return 0;
 
+	in = omapdss_of_find_source_for_first_ep(dssdev->dev->of_node);
+	if (IS_ERR(in)) {
+		dev_err(dssdev->dev, "failed to find video source\n");
+		return PTR_ERR(in);
+	}
+
 	r = in->ops.dpi->connect(in, dssdev);
-	if (r)
+	if (r) {
+		omap_dss_put_device(in);
 		return r;
+	}
 
 	init_lb035q02_panel(ddata->spi);
 
+	ddata->in = in;
 	return 0;
 }
 
@@ -143,6 +152,9 @@ static void lb035q02_disconnect(struct omap_dss_device *dssdev)
 		return;
 
 	in->ops.dpi->disconnect(in, dssdev);
+
+	omap_dss_put_device(in);
+	ddata->in = NULL;
 }
 
 static int lb035q02_enable(struct omap_dss_device *dssdev)
@@ -230,9 +242,7 @@ static struct omap_dss_driver lb035q02_ops = {
 
 static int lb035q02_probe_of(struct spi_device *spi)
 {
-	struct device_node *node = spi->dev.of_node;
 	struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
-	struct omap_dss_device *in;
 	struct gpio_desc *gpio;
 
 	gpio = devm_gpiod_get(&spi->dev, "enable", GPIOD_OUT_LOW);
@@ -243,14 +253,6 @@ static int lb035q02_probe_of(struct spi_device *spi)
 
 	ddata->enable_gpio = gpio;
 
-	in = omapdss_of_find_source_for_first_ep(node);
-	if (IS_ERR(in)) {
-		dev_err(&spi->dev, "failed to find video source\n");
-		return PTR_ERR(in);
-	}
-
-	ddata->in = in;
-
 	return 0;
 }
 
@@ -268,9 +270,6 @@ static int lb035q02_panel_spi_probe(struct spi_device *spi)
 
 	ddata->spi = spi;
 
-	if (!spi->dev.of_node)
-		return -ENODEV;
-
 	r = lb035q02_probe_of(spi);
 	if (r)
 		return r;
@@ -287,29 +286,22 @@ static int lb035q02_panel_spi_probe(struct spi_device *spi)
 	r = omapdss_register_display(dssdev);
 	if (r) {
 		dev_err(&spi->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 lb035q02_panel_spi_remove(struct spi_device *spi)
 {
 	struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
 	struct omap_dss_device *dssdev = &ddata->dssdev;
-	struct omap_dss_device *in = ddata->in;
 
 	omapdss_unregister_display(dssdev);
 
 	lb035q02_disable(dssdev);
 	lb035q02_disconnect(dssdev);
 
-	omap_dss_put_device(in);
-
 	return 0;
 }
 

drivers/gpu/drm/omapdrm/displays/panel-nec-nl8048hl11.c

@@ -115,16 +115,25 @@ static int init_nec_8048_wvga_lcd(struct spi_device *spi)
 static int nec_8048_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;
 
 	if (omapdss_device_is_connected(dssdev))
 		return 0;
 
+	in = omapdss_of_find_source_for_first_ep(dssdev->dev->of_node);
+	if (IS_ERR(in)) {
+		dev_err(dssdev->dev, "failed to find video source\n");
+		return PTR_ERR(in);
+	}
+
 	r = in->ops.dpi->connect(in, dssdev);
-	if (r)
+	if (r) {
+		omap_dss_put_device(in);
 		return r;
+	}
 
+	ddata->in = in;
 	return 0;
 }
 
@@ -137,6 +146,9 @@ static void nec_8048_disconnect(struct omap_dss_device *dssdev)
 		return;
 
 	in->ops.dpi->disconnect(in, dssdev);
+
+	omap_dss_put_device(in);
+	ddata->in = NULL;
 }
 
 static int nec_8048_enable(struct omap_dss_device *dssdev)
@@ -226,7 +238,6 @@ static int nec_8048_probe_of(struct spi_device *spi)
 {
 	struct device_node *node = spi->dev.of_node;
 	struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
-	struct omap_dss_device *in;
 	int gpio;
 
 	gpio = of_get_named_gpio(node, "reset-gpios", 0);
@@ -239,14 +250,6 @@ static int nec_8048_probe_of(struct spi_device *spi)
 	/* XXX the panel spec doesn't mention any QVGA pin?? */
 	ddata->qvga_gpio = -ENOENT;
 
-	in = omapdss_of_find_source_for_first_ep(node);
-	if (IS_ERR(in)) {
-		dev_err(&spi->dev, "failed to find video source\n");
-		return PTR_ERR(in);
-	}
-
-	ddata->in = in;
-
 	return 0;
 }
 
@@ -277,9 +280,6 @@ static int nec_8048_probe(struct spi_device *spi)
 
 	ddata->spi = spi;
 
-	if (!spi->dev.of_node)
-		return -ENODEV;
-
 	r = nec_8048_probe_of(spi);
 	if (r)
 		return r;
@@ -288,14 +288,14 @@ static int nec_8048_probe(struct spi_device *spi)
 		r = devm_gpio_request_one(&spi->dev, ddata->qvga_gpio,
 				GPIOF_OUT_INIT_HIGH, "lcd QVGA");
 		if (r)
-			goto err_gpio;
+			return r;
 	}
 
 	if (gpio_is_valid(ddata->res_gpio)) {
 		r = devm_gpio_request_one(&spi->dev, ddata->res_gpio,
 				GPIOF_OUT_INIT_LOW, "lcd RES");
 		if (r)
-			goto err_gpio;
+			return r;
 	}
 
 	ddata->vm = nec_8048_panel_vm;
@@ -310,22 +310,16 @@ static int nec_8048_probe(struct spi_device *spi)
 	r = omapdss_register_display(dssdev);
 	if (r) {
 		dev_err(&spi->dev, "Failed to register panel\n");
-		goto err_reg;
+		return r;
 	}
 
 	return 0;
-
-err_reg:
-err_gpio:
-	omap_dss_put_device(ddata->in);
-	return r;
 }
 
 static int nec_8048_remove(struct spi_device *spi)
 {
 	struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
 	struct omap_dss_device *dssdev = &ddata->dssdev;
-	struct omap_dss_device *in = ddata->in;
 
 	dev_dbg(&ddata->spi->dev, "%s\n", __func__);
 
@@ -334,8 +328,6 @@ static int nec_8048_remove(struct spi_device *spi)
 	nec_8048_disable(dssdev);
 	nec_8048_disconnect(dssdev);
 
-	omap_dss_put_device(in);
-
 	return 0;
 }
 

drivers/gpu/drm/omapdrm/displays/panel-sharp-ls037v7dw01.c

@@ -61,16 +61,25 @@ static const struct videomode sharp_ls_vm = {
 static int sharp_ls_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;
 
 	if (omapdss_device_is_connected(dssdev))
 		return 0;
 
+	in = omapdss_of_find_source_for_first_ep(dssdev->dev->of_node);
+	if (IS_ERR(in)) {
+		dev_err(dssdev->dev, "failed to find video source\n");
+		return PTR_ERR(in);
+	}
+
 	r = in->ops.dpi->connect(in, dssdev);
-	if (r)
+	if (r) {
+		omap_dss_put_device(in);
 		return r;
+	}
 
+	ddata->in = in;
 	return 0;
 }
 
@@ -83,6 +92,9 @@ static void sharp_ls_disconnect(struct omap_dss_device *dssdev)
 		return;
 
 	in->ops.dpi->disconnect(in, dssdev);
+
+	omap_dss_put_device(in);
+	ddata->in = NULL;
 }
 
 static int sharp_ls_enable(struct omap_dss_device *dssdev)
@@ -210,8 +222,6 @@ static  int sharp_ls_get_gpio_of(struct device *dev, int index, int val,
 static int sharp_ls_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;
 	int r;
 
 	ddata->vcc = devm_regulator_get(&pdev->dev, "envdd");
@@ -245,14 +255,6 @@ static int sharp_ls_probe_of(struct platform_device *pdev)
 	if (r)
 		return r;
 
-	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;
 }
 
@@ -268,9 +270,6 @@ static int sharp_ls_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, ddata);
 
-	if (!pdev->dev.of_node)
-		return -ENODEV;
-
 	r = sharp_ls_probe_of(pdev);
 	if (r)
 		return r;
@@ -287,29 +286,22 @@ static int sharp_ls_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 sharp_ls_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(dssdev);
 
 	sharp_ls_disable(dssdev);
 	sharp_ls_disconnect(dssdev);
 
-	omap_dss_put_device(in);
-
 	return 0;
 }
 

drivers/gpu/drm/omapdrm/displays/panel-sony-acx565akm.c

@@ -216,12 +216,12 @@ static void set_display_state(struct panel_drv_data *ddata, int enabled)
 
 static int panel_enabled(struct panel_drv_data *ddata)
 {
+	__be32 v;
 	u32 disp_status;
 	int enabled;
 
-	acx565akm_read(ddata, MIPID_CMD_READ_DISP_STATUS,
-			(u8 *)&disp_status, 4);
-	disp_status = __be32_to_cpu(disp_status);
+	acx565akm_read(ddata, MIPID_CMD_READ_DISP_STATUS, (u8 *)&v, 4);
+	disp_status = __be32_to_cpu(v);
 	enabled = (disp_status & (1 << 17)) && (disp_status & (1 << 10));
 	dev_dbg(&ddata->spi->dev,
 		"LCD panel %senabled by bootloader (status 0x%04x)\n",
@@ -289,7 +289,7 @@ static void enable_backlight_ctrl(struct panel_drv_data *ddata, int enable)
 	acx565akm_write(ddata, MIPID_CMD_WRITE_CTRL_DISP, (u8 *)&ctrl, 2);
 }
 
-static void set_cabc_mode(struct panel_drv_data *ddata, unsigned mode)
+static void set_cabc_mode(struct panel_drv_data *ddata, unsigned int mode)
 {
 	u16 cabc_ctrl;
 
@@ -303,12 +303,12 @@ static void set_cabc_mode(struct panel_drv_data *ddata, unsigned mode)
 	acx565akm_write(ddata, MIPID_CMD_WRITE_CABC, (u8 *)&cabc_ctrl, 2);
 }
 
-static unsigned get_cabc_mode(struct panel_drv_data *ddata)
+static unsigned int get_cabc_mode(struct panel_drv_data *ddata)
 {
 	return ddata->cabc_mode;
 }
 
-static unsigned get_hw_cabc_mode(struct panel_drv_data *ddata)
+static unsigned int get_hw_cabc_mode(struct panel_drv_data *ddata)
 {
 	u8 cabc_ctrl;
 
@@ -510,16 +510,25 @@ static const struct attribute_group bldev_attr_group = {
 static int acx565akm_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;
 
 	if (omapdss_device_is_connected(dssdev))
 		return 0;
 
+	in = omapdss_of_find_source_for_first_ep(dssdev->dev->of_node);
+	if (IS_ERR(in)) {
+		dev_err(dssdev->dev, "failed to find video source\n");
+		return PTR_ERR(in);
+	}
+
 	r = in->ops.sdi->connect(in, dssdev);
-	if (r)
+	if (r) {
+		omap_dss_put_device(in);
 		return r;
+	}
 
+	ddata->in = in;
 	return 0;
 }
 
@@ -532,6 +541,9 @@ static void acx565akm_disconnect(struct omap_dss_device *dssdev)
 		return;
 
 	in->ops.sdi->disconnect(in, dssdev);
+
+	omap_dss_put_device(in);
+	ddata->in = NULL;
 }
 
 static int acx565akm_panel_power_on(struct omap_dss_device *dssdev)
@@ -700,12 +712,6 @@ static int acx565akm_probe_of(struct spi_device *spi)
 
 	ddata->reset_gpio = of_get_named_gpio(np, "reset-gpios", 0);
 
-	ddata->in = omapdss_of_find_source_for_first_ep(np);
-	if (IS_ERR(ddata->in)) {
-		dev_err(&spi->dev, "failed to find video source\n");
-		return PTR_ERR(ddata->in);
-	}
-
 	return 0;
 }
 
@@ -720,9 +726,6 @@ static int acx565akm_probe(struct spi_device *spi)
 
 	dev_dbg(&spi->dev, "%s\n", __func__);
 
-	if (!spi->dev.of_node)
-		return -ENODEV;
-
 	spi->mode = SPI_MODE_3;
 
 	ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);
@@ -826,7 +829,6 @@ static int acx565akm_probe(struct spi_device *spi)
 err_reg_bl:
 err_detect:
 err_gpio:
-	omap_dss_put_device(ddata->in);
 	return r;
 }
 
@@ -834,7 +836,6 @@ static int acx565akm_remove(struct spi_device *spi)
 {
 	struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
 	struct omap_dss_device *dssdev = &ddata->dssdev;
-	struct omap_dss_device *in = ddata->in;
 
 	dev_dbg(&ddata->spi->dev, "%s\n", __func__);
 
@@ -846,8 +847,6 @@ static int acx565akm_remove(struct spi_device *spi)
 	acx565akm_disable(dssdev);
 	acx565akm_disconnect(dssdev);
 
-	omap_dss_put_device(in);
-
 	return 0;
 }
 

drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c

@@ -169,16 +169,25 @@ enum jbt_register {
 static int td028ttec1_panel_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;
 
 	if (omapdss_device_is_connected(dssdev))
 		return 0;
 
+	in = omapdss_of_find_source_for_first_ep(dssdev->dev->of_node);
+	if (IS_ERR(in)) {
+		dev_err(dssdev->dev, "failed to find video source\n");
+		return PTR_ERR(in);
+	}
+
 	r = in->ops.dpi->connect(in, dssdev);
-	if (r)
+	if (r) {
+		omap_dss_put_device(in);
 		return r;
+	}
 
+	ddata->in = in;
 	return 0;
 }
 
@@ -191,6 +200,9 @@ static void td028ttec1_panel_disconnect(struct omap_dss_device *dssdev)
 		return;
 
 	in->ops.dpi->disconnect(in, dssdev);
+
+	omap_dss_put_device(in);
+	ddata->in = NULL;
 }
 
 static int td028ttec1_panel_enable(struct omap_dss_device *dssdev)
@@ -362,23 +374,6 @@ static struct omap_dss_driver td028ttec1_ops = {
 	.check_timings	= td028ttec1_panel_check_timings,
 };
 
-static int td028ttec1_probe_of(struct spi_device *spi)
-{
-	struct device_node *node = spi->dev.of_node;
-	struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
-	struct omap_dss_device *in;
-
-	in = omapdss_of_find_source_for_first_ep(node);
-	if (IS_ERR(in)) {
-		dev_err(&spi->dev, "failed to find video source\n");
-		return PTR_ERR(in);
-	}
-
-	ddata->in = in;
-
-	return 0;
-}
-
 static int td028ttec1_panel_probe(struct spi_device *spi)
 {
 	struct panel_drv_data *ddata;
@@ -404,13 +399,6 @@ static int td028ttec1_panel_probe(struct spi_device *spi)
 
 	ddata->spi_dev = spi;
 
-	if (!spi->dev.of_node)
-		return -ENODEV;
-
-	r = td028ttec1_probe_of(spi);
-	if (r)
-		return r;
-
 	ddata->vm = td028ttec1_panel_vm;
 
 	dssdev = &ddata->dssdev;
@@ -423,21 +411,16 @@ static int td028ttec1_panel_probe(struct spi_device *spi)
 	r = omapdss_register_display(dssdev);
 	if (r) {
 		dev_err(&spi->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 td028ttec1_panel_remove(struct spi_device *spi)
 {
 	struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
 	struct omap_dss_device *dssdev = &ddata->dssdev;
-	struct omap_dss_device *in = ddata->in;
 
 	dev_dbg(&ddata->spi_dev->dev, "%s\n", __func__);
 
@@ -446,8 +429,6 @@ static int td028ttec1_panel_remove(struct spi_device *spi)
 	td028ttec1_panel_disable(dssdev);
 	td028ttec1_panel_disconnect(dssdev);
 
-	omap_dss_put_device(in);
-
 	return 0;
 }
 

drivers/gpu/drm/omapdrm/displays/panel-tpo-td043mtea1.c

@@ -340,16 +340,25 @@ static void tpo_td043_power_off(struct panel_drv_data *ddata)
 static int tpo_td043_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;
 
 	if (omapdss_device_is_connected(dssdev))
 		return 0;
 
+	in = omapdss_of_find_source_for_first_ep(dssdev->dev->of_node);
+	if (IS_ERR(in)) {
+		dev_err(dssdev->dev, "failed to find video source\n");
+		return PTR_ERR(in);
+	}
+
 	r = in->ops.dpi->connect(in, dssdev);
-	if (r)
+	if (r) {
+		omap_dss_put_device(in);
 		return r;
+	}
 
+	ddata->in = in;
 	return 0;
 }
 
@@ -362,6 +371,9 @@ static void tpo_td043_disconnect(struct omap_dss_device *dssdev)
 		return;
 
 	in->ops.dpi->disconnect(in, dssdev);
+
+	omap_dss_put_device(in);
+	ddata->in = NULL;
 }
 
 static int tpo_td043_enable(struct omap_dss_device *dssdev)
@@ -463,7 +475,6 @@ static int tpo_td043_probe_of(struct spi_device *spi)
 {
 	struct device_node *node = spi->dev.of_node;
 	struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
-	struct omap_dss_device *in;
 	int gpio;
 
 	gpio = of_get_named_gpio(node, "reset-gpios", 0);
@@ -473,14 +484,6 @@ static int tpo_td043_probe_of(struct spi_device *spi)
 	}
 	ddata->nreset_gpio = gpio;
 
-	in = omapdss_of_find_source_for_first_ep(node);
-	if (IS_ERR(in)) {
-		dev_err(&spi->dev, "failed to find video source\n");
-		return PTR_ERR(in);
-	}
-
-	ddata->in = in;
-
 	return 0;
 }
 
@@ -509,9 +512,6 @@ static int tpo_td043_probe(struct spi_device *spi)
 
 	ddata->spi = spi;
 
-	if (!spi->dev.of_node)
-		return -ENODEV;
-
 	r = tpo_td043_probe_of(spi);
 	if (r)
 		return r;
@@ -564,7 +564,6 @@ static int tpo_td043_probe(struct spi_device *spi)
 err_sysfs:
 err_gpio_req:
 err_regulator:
-	omap_dss_put_device(ddata->in);
 	return r;
 }
 
@@ -572,7 +571,6 @@ static int tpo_td043_remove(struct spi_device *spi)
 {
 	struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
 	struct omap_dss_device *dssdev = &ddata->dssdev;
-	struct omap_dss_device *in = ddata->in;
 
 	dev_dbg(&ddata->spi->dev, "%s\n", __func__);
 
@@ -581,8 +579,6 @@ static int tpo_td043_remove(struct spi_device *spi)
 	tpo_td043_disable(dssdev);
 	tpo_td043_disconnect(dssdev);
 
-	omap_dss_put_device(in);
-
 	sysfs_remove_group(&spi->dev.kobj, &tpo_td043_attr_group);
 
 	return 0;

drivers/gpu/drm/omapdrm/dss/base.c

@@ -18,10 +18,11 @@
 #include <linux/of.h>
 #include <linux/of_graph.h>
 #include <linux/list.h>
+
+#include "dss.h"
 #include "omapdss.h"
 
-static bool dss_initialized;
-static const struct dispc_ops *ops;
+static struct dss_device *dss_device;
 
 static struct list_head omapdss_comp_list;
 
@@ -31,27 +32,27 @@ struct omapdss_comp_node {
 	bool dss_core_component;
 };
 
-void omapdss_set_is_initialized(bool set)
+struct dss_device *omapdss_get_dss(void)
 {
-	dss_initialized = set;
+	return dss_device;
 }
-EXPORT_SYMBOL(omapdss_set_is_initialized);
+EXPORT_SYMBOL(omapdss_get_dss);
 
-bool omapdss_is_initialized(void)
+void omapdss_set_dss(struct dss_device *dss)
 {
-	return dss_initialized;
+	dss_device = dss;
 }
-EXPORT_SYMBOL(omapdss_is_initialized);
+EXPORT_SYMBOL(omapdss_set_dss);
 
-void dispc_set_ops(const struct dispc_ops *o)
+struct dispc_device *dispc_get_dispc(struct dss_device *dss)
 {
-	ops = o;
+	return dss->dispc;
 }
-EXPORT_SYMBOL(dispc_set_ops);
+EXPORT_SYMBOL(dispc_get_dispc);
 
-const struct dispc_ops *dispc_get_ops(void)
+const struct dispc_ops *dispc_get_ops(struct dss_device *dss)
 {
-	return ops;
+	return dss->dispc_ops;
 }
 EXPORT_SYMBOL(dispc_get_ops);
 

drivers/gpu/drm/omapdrm/dss/display.c

@@ -28,12 +28,11 @@
 
 #include "omapdss.h"
 
-void omapdss_default_get_timings(struct omap_dss_device *dssdev,
-				 struct videomode *vm)
+static void omapdss_default_get_timings(struct omap_dss_device *dssdev,
+					struct videomode *vm)
 {
 	*vm = dssdev->panel.vm;
 }
-EXPORT_SYMBOL(omapdss_default_get_timings);
 
 static LIST_HEAD(panel_list);
 static DEFINE_MUTEX(panel_list_mutex);

drivers/gpu/drm/omapdrm/dss/dpi.c

@@ -38,6 +38,7 @@
 struct dpi_data {
 	struct platform_device *pdev;
 	enum dss_model dss_model;
+	struct dss_device *dss;
 
 	struct regulator *vdds_dsi_reg;
 	enum dss_clk_source clk_src;
@@ -57,7 +58,8 @@ static struct dpi_data *dpi_get_data_from_dssdev(struct omap_dss_device *dssdev)
 	return container_of(dssdev, struct dpi_data, output);
 }
 
-static enum dss_clk_source dpi_get_clk_src_dra7xx(enum omap_channel channel)
+static enum dss_clk_source dpi_get_clk_src_dra7xx(struct dpi_data *dpi,
+						  enum omap_channel channel)
 {
 	/*
 	 * Possible clock sources:
@@ -69,23 +71,23 @@ static enum dss_clk_source dpi_get_clk_src_dra7xx(enum omap_channel channel)
 	switch (channel) {
 	case OMAP_DSS_CHANNEL_LCD:
 	{
-		if (dss_pll_find_by_src(DSS_CLK_SRC_PLL1_1))
+		if (dss_pll_find_by_src(dpi->dss, DSS_CLK_SRC_PLL1_1))
 			return DSS_CLK_SRC_PLL1_1;
 		break;
 	}
 	case OMAP_DSS_CHANNEL_LCD2:
 	{
-		if (dss_pll_find_by_src(DSS_CLK_SRC_PLL1_3))
+		if (dss_pll_find_by_src(dpi->dss, DSS_CLK_SRC_PLL1_3))
 			return DSS_CLK_SRC_PLL1_3;
-		if (dss_pll_find_by_src(DSS_CLK_SRC_PLL2_3))
+		if (dss_pll_find_by_src(dpi->dss, DSS_CLK_SRC_PLL2_3))
 			return DSS_CLK_SRC_PLL2_3;
 		break;
 	}
 	case OMAP_DSS_CHANNEL_LCD3:
 	{
-		if (dss_pll_find_by_src(DSS_CLK_SRC_PLL2_1))
+		if (dss_pll_find_by_src(dpi->dss, DSS_CLK_SRC_PLL2_1))
 			return DSS_CLK_SRC_PLL2_1;
-		if (dss_pll_find_by_src(DSS_CLK_SRC_PLL1_3))
+		if (dss_pll_find_by_src(dpi->dss, DSS_CLK_SRC_PLL1_3))
 			return DSS_CLK_SRC_PLL1_3;
 		break;
 	}
@@ -132,7 +134,7 @@ static enum dss_clk_source dpi_get_clk_src(struct dpi_data *dpi)
 		}
 
 	case DSS_MODEL_DRA7:
-		return dpi_get_clk_src_dra7xx(channel);
+		return dpi_get_clk_src_dra7xx(dpi, channel);
 
 	default:
 		return DSS_CLK_SRC_FCK;
@@ -141,7 +143,7 @@ static enum dss_clk_source dpi_get_clk_src(struct dpi_data *dpi)
 
 struct dpi_clk_calc_ctx {
 	struct dss_pll *pll;
-	unsigned clkout_idx;
+	unsigned int clkout_idx;
 
 	/* inputs */
 
@@ -189,8 +191,9 @@ static bool dpi_calc_hsdiv_cb(int m_dispc, unsigned long dispc,
 	ctx->pll_cinfo.mX[ctx->clkout_idx] = m_dispc;
 	ctx->pll_cinfo.clkout[ctx->clkout_idx] = dispc;
 
-	return dispc_div_calc(dispc, ctx->pck_min, ctx->pck_max,
-			dpi_calc_dispc_cb, ctx);
+	return dispc_div_calc(ctx->pll->dss->dispc, dispc,
+			      ctx->pck_min, ctx->pck_max,
+			      dpi_calc_dispc_cb, ctx);
 }
 
 
@@ -206,7 +209,7 @@ static bool dpi_calc_pll_cb(int n, int m, unsigned long fint,
 	ctx->pll_cinfo.clkdco = clkdco;
 
 	return dss_pll_hsdiv_calc_a(ctx->pll, clkdco,
-		ctx->pck_min, dss_get_max_fck_rate(),
+		ctx->pck_min, dss_get_max_fck_rate(ctx->pll->dss),
 		dpi_calc_hsdiv_cb, ctx);
 }
 
@@ -216,8 +219,9 @@ static bool dpi_calc_dss_cb(unsigned long fck, void *data)
 
 	ctx->fck = fck;
 
-	return dispc_div_calc(fck, ctx->pck_min, ctx->pck_max,
-			dpi_calc_dispc_cb, ctx);
+	return dispc_div_calc(ctx->pll->dss->dispc, fck,
+			      ctx->pck_min, ctx->pck_max,
+			      dpi_calc_dispc_cb, ctx);
 }
 
 static bool dpi_pll_clk_calc(struct dpi_data *dpi, unsigned long pck,
@@ -255,7 +259,8 @@ static bool dpi_pll_clk_calc(struct dpi_data *dpi, unsigned long pck,
 	}
 }
 
-static bool dpi_dss_clk_calc(unsigned long pck, struct dpi_clk_calc_ctx *ctx)
+static bool dpi_dss_clk_calc(struct dpi_data *dpi, unsigned long pck,
+			     struct dpi_clk_calc_ctx *ctx)
 {
 	int i;
 
@@ -276,7 +281,8 @@ static bool dpi_dss_clk_calc(unsigned long pck, struct dpi_clk_calc_ctx *ctx)
 			ctx->pck_min = 0;
 		ctx->pck_max = pck + 1000 * i * i * i;
 
-		ok = dss_div_calc(pck, ctx->pck_min, dpi_calc_dss_cb, ctx);
+		ok = dss_div_calc(dpi->dss, pck, ctx->pck_min,
+				  dpi_calc_dss_cb, ctx);
 		if (ok)
 			return ok;
 	}
@@ -302,7 +308,7 @@ static int dpi_set_pll_clk(struct dpi_data *dpi, enum omap_channel channel,
 	if (r)
 		return r;
 
-	dss_select_lcd_clk_source(channel, dpi->clk_src);
+	dss_select_lcd_clk_source(dpi->dss, channel, dpi->clk_src);
 
 	dpi->mgr_config.clock_info = ctx.dispc_cinfo;
 
@@ -320,11 +326,11 @@ static int dpi_set_dispc_clk(struct dpi_data *dpi, unsigned long pck_req,
 	int r;
 	bool ok;
 
-	ok = dpi_dss_clk_calc(pck_req, &ctx);
+	ok = dpi_dss_clk_calc(dpi, pck_req, &ctx);
 	if (!ok)
 		return -EINVAL;
 
-	r = dss_set_fck_rate(ctx.fck);
+	r = dss_set_fck_rate(dpi->dss, ctx.fck);
 	if (r)
 		return r;
 
@@ -339,8 +345,6 @@ static int dpi_set_dispc_clk(struct dpi_data *dpi, unsigned long pck_req,
 
 static int dpi_set_mode(struct dpi_data *dpi)
 {
-	struct omap_dss_device *out = &dpi->output;
-	enum omap_channel channel = out->dispc_channel;
 	struct videomode *vm = &dpi->vm;
 	int lck_div = 0, pck_div = 0;
 	unsigned long fck = 0;
@@ -348,8 +352,8 @@ static int dpi_set_mode(struct dpi_data *dpi)
 	int r = 0;
 
 	if (dpi->pll)
-		r = dpi_set_pll_clk(dpi, channel, vm->pixelclock, &fck,
-				&lck_div, &pck_div);
+		r = dpi_set_pll_clk(dpi, dpi->output.dispc_channel,
+				    vm->pixelclock, &fck, &lck_div, &pck_div);
 	else
 		r = dpi_set_dispc_clk(dpi, vm->pixelclock, &fck,
 				&lck_div, &pck_div);
@@ -365,16 +369,13 @@ static int dpi_set_mode(struct dpi_data *dpi)
 		vm->pixelclock = pck;
 	}
 
-	dss_mgr_set_timings(channel, vm);
+	dss_mgr_set_timings(&dpi->output, vm);
 
 	return 0;
 }
 
 static void dpi_config_lcd_manager(struct dpi_data *dpi)
 {
-	struct omap_dss_device *out = &dpi->output;
-	enum omap_channel channel = out->dispc_channel;
-
 	dpi->mgr_config.io_pad_mode = DSS_IO_PAD_MODE_BYPASS;
 
 	dpi->mgr_config.stallmode = false;
@@ -384,14 +385,13 @@ static void dpi_config_lcd_manager(struct dpi_data *dpi)
 
 	dpi->mgr_config.lcden_sig_polarity = 0;
 
-	dss_mgr_set_lcd_config(channel, &dpi->mgr_config);
+	dss_mgr_set_lcd_config(&dpi->output, &dpi->mgr_config);
 }
 
 static int dpi_display_enable(struct omap_dss_device *dssdev)
 {
 	struct dpi_data *dpi = dpi_get_data_from_dssdev(dssdev);
 	struct omap_dss_device *out = &dpi->output;
-	enum omap_channel channel = out->dispc_channel;
 	int r;
 
 	mutex_lock(&dpi->lock);
@@ -408,11 +408,11 @@ static int dpi_display_enable(struct omap_dss_device *dssdev)
 			goto err_reg_enable;
 	}
 
-	r = dispc_runtime_get();
+	r = dispc_runtime_get(dpi->dss->dispc);
 	if (r)
 		goto err_get_dispc;
 
-	r = dss_dpi_select_source(out->port_num, channel);
+	r = dss_dpi_select_source(dpi->dss, out->port_num, out->dispc_channel);
 	if (r)
 		goto err_src_sel;
 
@@ -430,7 +430,7 @@ static int dpi_display_enable(struct omap_dss_device *dssdev)
 
 	mdelay(2);
 
-	r = dss_mgr_enable(channel);
+	r = dss_mgr_enable(&dpi->output);
 	if (r)
 		goto err_mgr_enable;
 
@@ -444,7 +444,7 @@ static int dpi_display_enable(struct omap_dss_device *dssdev)
 		dss_pll_disable(dpi->pll);
 err_pll_init:
 err_src_sel:
-	dispc_runtime_put();
+	dispc_runtime_put(dpi->dss->dispc);
 err_get_dispc:
 	if (dpi->vdds_dsi_reg)
 		regulator_disable(dpi->vdds_dsi_reg);
@@ -457,18 +457,18 @@ static int dpi_display_enable(struct omap_dss_device *dssdev)
 static void dpi_display_disable(struct omap_dss_device *dssdev)
 {
 	struct dpi_data *dpi = dpi_get_data_from_dssdev(dssdev);
-	enum omap_channel channel = dpi->output.dispc_channel;
 
 	mutex_lock(&dpi->lock);
 
-	dss_mgr_disable(channel);
+	dss_mgr_disable(&dpi->output);
 
 	if (dpi->pll) {
-		dss_select_lcd_clk_source(channel, DSS_CLK_SRC_FCK);
+		dss_select_lcd_clk_source(dpi->dss, dpi->output.dispc_channel,
+					  DSS_CLK_SRC_FCK);
 		dss_pll_disable(dpi->pll);
 	}
 
-	dispc_runtime_put();
+	dispc_runtime_put(dpi->dss->dispc);
 
 	if (dpi->vdds_dsi_reg)
 		regulator_disable(dpi->vdds_dsi_reg);
@@ -516,7 +516,7 @@ static int dpi_check_timings(struct omap_dss_device *dssdev,
 	if (vm->hactive % 8 != 0)
 		return -EINVAL;
 
-	if (!dispc_mgr_timings_ok(channel, vm))
+	if (!dispc_mgr_timings_ok(dpi->dss->dispc, channel, vm))
 		return -EINVAL;
 
 	if (vm->pixelclock == 0)
@@ -529,7 +529,7 @@ static int dpi_check_timings(struct omap_dss_device *dssdev,
 
 		fck = ctx.pll_cinfo.clkout[ctx.clkout_idx];
 	} else {
-		ok = dpi_dss_clk_calc(vm->pixelclock, &ctx);
+		ok = dpi_dss_clk_calc(dpi, vm->pixelclock, &ctx);
 		if (!ok)
 			return -EINVAL;
 
@@ -602,7 +602,7 @@ static void dpi_init_pll(struct dpi_data *dpi)
 
 	dpi->clk_src = dpi_get_clk_src(dpi);
 
-	pll = dss_pll_find_by_src(dpi->clk_src);
+	pll = dss_pll_find_by_src(dpi->dss, dpi->clk_src);
 	if (!pll)
 		return;
 
@@ -654,7 +654,6 @@ static int dpi_connect(struct omap_dss_device *dssdev,
 		struct omap_dss_device *dst)
 {
 	struct dpi_data *dpi = dpi_get_data_from_dssdev(dssdev);
-	enum omap_channel channel = dpi->output.dispc_channel;
 	int r;
 
 	r = dpi_init_regulator(dpi);
@@ -663,7 +662,7 @@ static int dpi_connect(struct omap_dss_device *dssdev,
 
 	dpi_init_pll(dpi);
 
-	r = dss_mgr_connect(channel, dssdev);
+	r = dss_mgr_connect(&dpi->output, dssdev);
 	if (r)
 		return r;
 
@@ -671,7 +670,7 @@ static int dpi_connect(struct omap_dss_device *dssdev,
 	if (r) {
 		DSSERR("failed to connect output to new device: %s\n",
 				dst->name);
-		dss_mgr_disconnect(channel, dssdev);
+		dss_mgr_disconnect(&dpi->output, dssdev);
 		return r;
 	}
 
@@ -682,7 +681,6 @@ static void dpi_disconnect(struct omap_dss_device *dssdev,
 		struct omap_dss_device *dst)
 {
 	struct dpi_data *dpi = dpi_get_data_from_dssdev(dssdev);
-	enum omap_channel channel = dpi->output.dispc_channel;
 
 	WARN_ON(dst != dssdev->dst);
 
@@ -691,7 +689,7 @@ static void dpi_disconnect(struct omap_dss_device *dssdev,
 
 	omapdss_output_unset_device(dssdev);
 
-	dss_mgr_disconnect(channel, dssdev);
+	dss_mgr_disconnect(&dpi->output, dssdev);
 }
 
 static const struct omapdss_dpi_ops dpi_ops = {
@@ -748,8 +746,8 @@ static void dpi_uninit_output_port(struct device_node *port)
 	omapdss_unregister_output(out);
 }
 
-int dpi_init_port(struct platform_device *pdev, struct device_node *port,
-		  enum dss_model dss_model)
+int dpi_init_port(struct dss_device *dss, struct platform_device *pdev,
+		  struct device_node *port, enum dss_model dss_model)
 {
 	struct dpi_data *dpi;
 	struct device_node *ep;
@@ -776,6 +774,7 @@ int dpi_init_port(struct platform_device *pdev, struct device_node *port,
 
 	dpi->pdev = pdev;
 	dpi->dss_model = dss_model;
+	dpi->dss = dss;
 	port->data = dpi;
 
 	mutex_init(&dpi->lock);

drivers/gpu/drm/omapdrm/dss/dss-of.c

@@ -44,7 +44,6 @@ struct device_node *dss_of_port_get_parent_device(struct device_node *port)
 
 	return NULL;
 }
-EXPORT_SYMBOL_GPL(dss_of_port_get_parent_device);
 
 u32 dss_of_port_get_port_number(struct device_node *port)
 {
@@ -57,7 +56,6 @@ u32 dss_of_port_get_port_number(struct device_node *port)
 
 	return reg;
 }
-EXPORT_SYMBOL_GPL(dss_of_port_get_port_number);
 
 struct omap_dss_device *
 omapdss_of_find_source_for_first_ep(struct device_node *node)

drivers/gpu/drm/omapdrm/dss/hdmi.h

@@ -29,6 +29,8 @@
 #include "omapdss.h"
 #include "dss.h"
 
+struct dss_device;
+
 /* HDMI Wrapper */
 
 #define HDMI_WP_REVISION			0x0
@@ -324,8 +326,8 @@ phys_addr_t hdmi_wp_get_audio_dma_addr(struct hdmi_wp_data *wp);
 
 /* HDMI PLL funcs */
 void hdmi_pll_dump(struct hdmi_pll_data *pll, struct seq_file *s);
-int hdmi_pll_init(struct platform_device *pdev, struct hdmi_pll_data *pll,
-	struct hdmi_wp_data *wp);
+int hdmi_pll_init(struct dss_device *dss, struct platform_device *pdev,
+		  struct hdmi_pll_data *pll, struct hdmi_wp_data *wp);
 void hdmi_pll_uninit(struct hdmi_pll_data *hpll);
 
 /* HDMI PHY funcs */
@@ -357,6 +359,9 @@ static inline bool hdmi_mode_has_audio(struct hdmi_config *cfg)
 struct omap_hdmi {
 	struct mutex lock;
 	struct platform_device *pdev;
+	struct dss_device *dss;
+
+	struct dss_debugfs_entry *debugfs;
 
 	struct hdmi_wp_data	wp;
 	struct hdmi_pll_data	pll;
@@ -384,4 +389,6 @@ struct omap_hdmi {
 	bool display_enabled;
 };
 
+#define dssdev_to_hdmi(dssdev) container_of(dssdev, struct omap_hdmi, output)
+
 #endif

drivers/gpu/drm/omapdrm/dss/hdmi4_cec.c

@@ -175,10 +175,10 @@ static int hdmi_cec_adap_enable(struct cec_adapter *adap, bool enable)
 		REG_FLD_MOD(core->base, HDMI_CORE_SYS_INTR_UNMASK4, 0, 3, 3);
 		hdmi_wp_clear_irqenable(core->wp, HDMI_IRQ_CORE);
 		hdmi_wp_set_irqstatus(core->wp, HDMI_IRQ_CORE);
-		hdmi4_core_disable(NULL);
+		hdmi4_core_disable(core);
 		return 0;
 	}
-	err = hdmi4_core_enable(NULL);
+	err = hdmi4_core_enable(core);
 	if (err)
 		return err;
 

drivers/gpu/drm/omapdrm/dss/hdmi4_core.h

@@ -266,8 +266,8 @@ void hdmi4_configure(struct hdmi_core_data *core, struct hdmi_wp_data *wp,
 void hdmi4_core_dump(struct hdmi_core_data *core, struct seq_file *s);
 int hdmi4_core_init(struct platform_device *pdev, struct hdmi_core_data *core);
 
-int hdmi4_core_enable(struct omap_dss_device *dssdev);
-void hdmi4_core_disable(struct omap_dss_device *dssdev);
+int hdmi4_core_enable(struct hdmi_core_data *core);
+void hdmi4_core_disable(struct hdmi_core_data *core);
 void hdmi4_core_powerdown_disable(struct hdmi_core_data *core);
 
 int hdmi4_audio_start(struct hdmi_core_data *core, struct hdmi_wp_data *wp);

drivers/gpu/drm/omapdrm/dss/hdmi5_core.c

@@ -50,14 +50,14 @@ static void hdmi_core_ddc_init(struct hdmi_core_data *core)
 {
 	void __iomem *base = core->base;
 	const unsigned long long iclk = 266000000;	/* DSS L3 ICLK */
-	const unsigned ss_scl_high = 4600;		/* ns */
-	const unsigned ss_scl_low = 5400;		/* ns */
-	const unsigned fs_scl_high = 600;		/* ns */
-	const unsigned fs_scl_low = 1300;		/* ns */
-	const unsigned sda_hold = 1000;			/* ns */
-	const unsigned sfr_div = 10;
+	const unsigned int ss_scl_high = 4600;		/* ns */
+	const unsigned int ss_scl_low = 5400;		/* ns */
+	const unsigned int fs_scl_high = 600;		/* ns */
+	const unsigned int fs_scl_low = 1300;		/* ns */
+	const unsigned int sda_hold = 1000;		/* ns */
+	const unsigned int sfr_div = 10;
 	unsigned long long sfr;
-	unsigned v;
+	unsigned int v;
 
 	sfr = iclk / sfr_div;	/* SFR_DIV */
 	sfr /= 1000;		/* SFR clock in kHz */
@@ -430,11 +430,11 @@ static void hdmi_core_write_avi_infoframe(struct hdmi_core_data *core,
 	void __iomem *base = core->base;
 	u8 data[HDMI_INFOFRAME_SIZE(AVI)];
 	u8 *ptr;
-	unsigned y, a, b, s;
-	unsigned c, m, r;
-	unsigned itc, ec, q, sc;
-	unsigned vic;
-	unsigned yq, cn, pr;
+	unsigned int y, a, b, s;
+	unsigned int c, m, r;
+	unsigned int itc, ec, q, sc;
+	unsigned int vic;
+	unsigned int yq, cn, pr;
 
 	hdmi_avi_infoframe_pack(frame, data, sizeof(data));
 

drivers/gpu/drm/omapdrm/dss/hdmi_phy.c

@@ -99,7 +99,7 @@ static void hdmi_phy_configure_lanes(struct hdmi_phy_data *phy)
 
 	u16 lane_cfg = 0;
 	int i;
-	unsigned lane_cfg_val;
+	unsigned int lane_cfg_val;
 	u16 pol_val = 0;
 
 	for (i = 0; i < 4; ++i)

drivers/gpu/drm/omapdrm/dss/hdmi_pll.c

@@ -48,7 +48,7 @@ static int hdmi_pll_enable(struct dss_pll *dsspll)
 	r = pm_runtime_get_sync(&pll->pdev->dev);
 	WARN_ON(r < 0);
 
-	dss_ctrl_pll_enable(DSS_PLL_HDMI, true);
+	dss_ctrl_pll_enable(dsspll, true);
 
 	r = hdmi_wp_set_pll_pwr(wp, HDMI_PLLPWRCMD_BOTHON_ALLCLKS);
 	if (r)
@@ -65,7 +65,7 @@ static void hdmi_pll_disable(struct dss_pll *dsspll)
 
 	hdmi_wp_set_pll_pwr(wp, HDMI_PLLPWRCMD_ALLOFF);
 
-	dss_ctrl_pll_enable(DSS_PLL_HDMI, false);
+	dss_ctrl_pll_enable(dsspll, false);
 
 	r = pm_runtime_put_sync(&pll->pdev->dev);
 	WARN_ON(r < 0 && r != -ENOSYS);
@@ -128,7 +128,8 @@ static const struct dss_pll_hw dss_omap5_hdmi_pll_hw = {
 	.has_refsel = true,
 };
 
-static int hdmi_init_pll_data(struct platform_device *pdev,
+static int hdmi_init_pll_data(struct dss_device *dss,
+			      struct platform_device *pdev,
 			      struct hdmi_pll_data *hpll)
 {
 	struct dss_pll *pll = &hpll->pll;
@@ -153,15 +154,15 @@ static int hdmi_init_pll_data(struct platform_device *pdev,
 
 	pll->ops = &hdmi_pll_ops;
 
-	r = dss_pll_register(pll);
+	r = dss_pll_register(dss, pll);
 	if (r)
 		return r;
 
 	return 0;
 }
 
-int hdmi_pll_init(struct platform_device *pdev, struct hdmi_pll_data *pll,
-	struct hdmi_wp_data *wp)
+int hdmi_pll_init(struct dss_device *dss, struct platform_device *pdev,
+		  struct hdmi_pll_data *pll, struct hdmi_wp_data *wp)
 {
 	int r;
 	struct resource *res;
@@ -174,7 +175,7 @@ int hdmi_pll_init(struct platform_device *pdev, struct hdmi_pll_data *pll,
 	if (IS_ERR(pll->base))
 		return PTR_ERR(pll->base);
 
-	r = hdmi_init_pll_data(pdev, pll);
+	r = hdmi_init_pll_data(dss, pdev, pll);
 	if (r) {
 		DSSERR("failed to init HDMI PLL\n");
 		return r;

drivers/gpu/drm/omapdrm/dss/hdmi_wp.c

@@ -168,7 +168,7 @@ void hdmi_wp_video_config_timing(struct hdmi_wp_data *wp,
 {
 	u32 timing_h = 0;
 	u32 timing_v = 0;
-	unsigned hsync_len_offset = 1;
+	unsigned int hsync_len_offset = 1;
 
 	DSSDBG("Enter hdmi_wp_video_config_timing\n");
 

drivers/gpu/drm/omapdrm/dss/output.c

@@ -156,7 +156,6 @@ struct omap_dss_device *omap_dss_find_output_by_port_node(struct device_node *po
 
 	return NULL;
 }
-EXPORT_SYMBOL(omap_dss_find_output_by_port_node);
 
 struct omap_dss_device *omapdss_find_output_from_display(struct omap_dss_device *dssdev)
 {
@@ -171,13 +170,16 @@ struct omap_dss_device *omapdss_find_output_from_display(struct omap_dss_device
 EXPORT_SYMBOL(omapdss_find_output_from_display);
 
 static const struct dss_mgr_ops *dss_mgr_ops;
+static struct omap_drm_private *dss_mgr_ops_priv;
 
-int dss_install_mgr_ops(const struct dss_mgr_ops *mgr_ops)
+int dss_install_mgr_ops(const struct dss_mgr_ops *mgr_ops,
+			struct omap_drm_private *priv)
 {
 	if (dss_mgr_ops)
 		return -EBUSY;
 
 	dss_mgr_ops = mgr_ops;
+	dss_mgr_ops_priv = priv;
 
 	return 0;
 }
@@ -186,64 +188,71 @@ EXPORT_SYMBOL(dss_install_mgr_ops);
 void dss_uninstall_mgr_ops(void)
 {
 	dss_mgr_ops = NULL;
+	dss_mgr_ops_priv = NULL;
 }
 EXPORT_SYMBOL(dss_uninstall_mgr_ops);
 
-int dss_mgr_connect(enum omap_channel channel,
-		struct omap_dss_device *dst)
+int dss_mgr_connect(struct omap_dss_device *dssdev, struct omap_dss_device *dst)
 {
-	return dss_mgr_ops->connect(channel, dst);
+	return dss_mgr_ops->connect(dss_mgr_ops_priv,
+				    dssdev->dispc_channel, dst);
 }
 EXPORT_SYMBOL(dss_mgr_connect);
 
-void dss_mgr_disconnect(enum omap_channel channel,
-		struct omap_dss_device *dst)
+void dss_mgr_disconnect(struct omap_dss_device *dssdev,
+			struct omap_dss_device *dst)
 {
-	dss_mgr_ops->disconnect(channel, dst);
+	dss_mgr_ops->disconnect(dss_mgr_ops_priv, dssdev->dispc_channel, dst);
 }
 EXPORT_SYMBOL(dss_mgr_disconnect);
 
-void dss_mgr_set_timings(enum omap_channel channel, const struct videomode *vm)
+void dss_mgr_set_timings(struct omap_dss_device *dssdev,
+			 const struct videomode *vm)
 {
-	dss_mgr_ops->set_timings(channel, vm);
+	dss_mgr_ops->set_timings(dss_mgr_ops_priv, dssdev->dispc_channel, vm);
 }
 EXPORT_SYMBOL(dss_mgr_set_timings);
 
-void dss_mgr_set_lcd_config(enum omap_channel channel,
+void dss_mgr_set_lcd_config(struct omap_dss_device *dssdev,
 		const struct dss_lcd_mgr_config *config)
 {
-	dss_mgr_ops->set_lcd_config(channel, config);
+	dss_mgr_ops->set_lcd_config(dss_mgr_ops_priv,
+				    dssdev->dispc_channel, config);
 }
 EXPORT_SYMBOL(dss_mgr_set_lcd_config);
 
-int dss_mgr_enable(enum omap_channel channel)
+int dss_mgr_enable(struct omap_dss_device *dssdev)
 {
-	return dss_mgr_ops->enable(channel);
+	return dss_mgr_ops->enable(dss_mgr_ops_priv, dssdev->dispc_channel);
 }
 EXPORT_SYMBOL(dss_mgr_enable);
 
-void dss_mgr_disable(enum omap_channel channel)
+void dss_mgr_disable(struct omap_dss_device *dssdev)
 {
-	dss_mgr_ops->disable(channel);
+	dss_mgr_ops->disable(dss_mgr_ops_priv, dssdev->dispc_channel);
 }
 EXPORT_SYMBOL(dss_mgr_disable);
 
-void dss_mgr_start_update(enum omap_channel channel)
+void dss_mgr_start_update(struct omap_dss_device *dssdev)
 {
-	dss_mgr_ops->start_update(channel);
+	dss_mgr_ops->start_update(dss_mgr_ops_priv, dssdev->dispc_channel);
 }
 EXPORT_SYMBOL(dss_mgr_start_update);
 
-int dss_mgr_register_framedone_handler(enum omap_channel channel,
+int dss_mgr_register_framedone_handler(struct omap_dss_device *dssdev,
 		void (*handler)(void *), void *data)
 {
-	return dss_mgr_ops->register_framedone_handler(channel, handler, data);
+	return dss_mgr_ops->register_framedone_handler(dss_mgr_ops_priv,
+						       dssdev->dispc_channel,
+						       handler, data);
 }
 EXPORT_SYMBOL(dss_mgr_register_framedone_handler);
 
-void dss_mgr_unregister_framedone_handler(enum omap_channel channel,
+void dss_mgr_unregister_framedone_handler(struct omap_dss_device *dssdev,
 		void (*handler)(void *), void *data)
 {
-	dss_mgr_ops->unregister_framedone_handler(channel, handler, data);
+	dss_mgr_ops->unregister_framedone_handler(dss_mgr_ops_priv,
+						  dssdev->dispc_channel,
+						  handler, data);
 }
 EXPORT_SYMBOL(dss_mgr_unregister_framedone_handler);

drivers/gpu/drm/omapdrm/omap_crtc.h

@@ -32,12 +32,12 @@ struct videomode;
 
 struct videomode *omap_crtc_timings(struct drm_crtc *crtc);
 enum omap_channel omap_crtc_channel(struct drm_crtc *crtc);
-void omap_crtc_pre_init(void);
+void omap_crtc_pre_init(struct omap_drm_private *priv);
 void omap_crtc_pre_uninit(void);
 struct drm_crtc *omap_crtc_init(struct drm_device *dev,
 		struct drm_plane *plane, struct omap_dss_device *dssdev);
 int omap_crtc_wait_pending(struct drm_crtc *crtc);
-void omap_crtc_error_irq(struct drm_crtc *crtc, uint32_t irqstatus);
+void omap_crtc_error_irq(struct drm_crtc *crtc, u32 irqstatus);
 void omap_crtc_vblank_irq(struct drm_crtc *crtc);
 
 #endif /* __OMAPDRM_CRTC_H__ */

drivers/gpu/drm/omapdrm/omap_drv.h

@@ -46,8 +46,12 @@
 struct omap_drm_usergart;
 
 struct omap_drm_private {
-	uint32_t omaprev;
+	struct drm_device *ddev;
+	struct device *dev;
+	u32 omaprev;
 
+	struct dss_device *dss;
+	struct dispc_device *dispc;
 	const struct dispc_ops *dispc_ops;
 
 	unsigned int num_crtcs;
@@ -81,7 +85,7 @@ struct omap_drm_private {
 	/* irq handling: */
 	spinlock_t wait_lock;		/* protects the wait_list */
 	struct list_head wait_list;	/* list of omap_irq_wait */
-	uint32_t irq_mask;		/* enabled irqs in addition to wait_list */
+	u32 irq_mask;			/* enabled irqs in addition to wait_list */
 
 	/* memory bandwidth limit if it is needed on the platform */
 	unsigned int max_bandwidth;

drivers/gpu/drm/omapdrm/omap_irq.h

@@ -32,7 +32,7 @@ void omap_drm_irq_uninstall(struct drm_device *dev);
 int omap_drm_irq_install(struct drm_device *dev);
 
 struct omap_irq_wait *omap_irq_wait_init(struct drm_device *dev,
-		uint32_t irqmask, int count);
+		u32 irqmask, int count);
 int omap_irq_wait(struct drm_device *dev, struct omap_irq_wait *wait,
 		unsigned long timeout);