drm/omap: Move most omap_dss_driver operations to omap_dss_device_ops

omap_dss_device instances have two ops structures, omap_dss_driver and
omap_dss_device_ops. The former is used for devices at the end of the
pipeline (a.k.a. display devices), and the latter for intermediate
devices.

Having two sets of operations isn't convenient as code that iterates
over omap_dss_device instances need to take them both into account.
There's currently a reasonably small amount of such code, but more will
be introduced to move the driver away from recursive operations. To
simplify current and future code, move all operations that are not
specific to the display device to the omap_dss_device_ops.

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>

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

@@ -119,7 +119,7 @@ static int tvc_check_timings(struct omap_dss_device *dssdev,
 	return src->ops->check_timings(src, vm);
 }
 
-static const struct omap_dss_driver tvc_driver = {
+static const struct omap_dss_device_ops tvc_ops = {
 	.connect		= tvc_connect,
 	.disconnect		= tvc_disconnect,
 
@@ -146,7 +146,7 @@ static int tvc_probe(struct platform_device *pdev)
 	ddata->vm = tvc_pal_vm;
 
 	dssdev = &ddata->dssdev;
-	dssdev->driver = &tvc_driver;
+	dssdev->ops = &tvc_ops;
 	dssdev->dev = &pdev->dev;
 	dssdev->type = OMAP_DISPLAY_TYPE_VENC;
 	dssdev->owner = THIS_MODULE;

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

@@ -265,7 +265,7 @@ static void dvic_disable_hpd(struct omap_dss_device *dssdev)
 	mutex_unlock(&ddata->hpd_lock);
 }
 
-static const struct omap_dss_driver dvic_driver = {
+static const struct omap_dss_device_ops dvic_ops = {
 	.connect	= dvic_connect,
 	.disconnect	= dvic_disconnect,
 
@@ -367,7 +367,7 @@ static int dvic_probe(struct platform_device *pdev)
 	ddata->vm = dvic_default_vm;
 
 	dssdev = &ddata->dssdev;
-	dssdev->driver = &dvic_driver;
+	dssdev->ops = &dvic_ops;
 	dssdev->dev = &pdev->dev;
 	dssdev->type = OMAP_DISPLAY_TYPE_DVI;
 	dssdev->owner = THIS_MODULE;

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

@@ -132,7 +132,7 @@ static int hdmic_read_edid(struct omap_dss_device *dssdev,
 {
 	struct omap_dss_device *src = dssdev->src;
 
-	return src->ops->hdmi.read_edid(src, edid, len);
+	return src->ops->read_edid(src, edid, len);
 }
 
 static bool hdmic_detect(struct omap_dss_device *dssdev)
@@ -144,7 +144,7 @@ static bool hdmic_detect(struct omap_dss_device *dssdev)
 	if (ddata->hpd_gpio)
 		connected = gpiod_get_value_cansleep(ddata->hpd_gpio);
 	else
-		connected = src->ops->hdmi.detect(src);
+		connected = src->ops->detect(src);
 	if (!connected && src->ops->hdmi.lost_hotplug)
 		src->ops->hdmi.lost_hotplug(src);
 	return connected;
@@ -164,8 +164,8 @@ static int hdmic_register_hpd_cb(struct omap_dss_device *dssdev,
 		ddata->hpd_cb_data = cb_data;
 		mutex_unlock(&ddata->hpd_lock);
 		return 0;
-	} else if (src->ops->hdmi.register_hpd_cb) {
-		return src->ops->hdmi.register_hpd_cb(src, cb, cb_data);
+	} else if (src->ops->register_hpd_cb) {
+		return src->ops->register_hpd_cb(src, cb, cb_data);
 	}
 
 	return -ENOTSUPP;
@@ -181,8 +181,8 @@ static void hdmic_unregister_hpd_cb(struct omap_dss_device *dssdev)
 		ddata->hpd_cb = NULL;
 		ddata->hpd_cb_data = NULL;
 		mutex_unlock(&ddata->hpd_lock);
-	} else if (src->ops->hdmi.unregister_hpd_cb) {
-		src->ops->hdmi.unregister_hpd_cb(src);
+	} else if (src->ops->unregister_hpd_cb) {
+		src->ops->unregister_hpd_cb(src);
 	}
 }
 
@@ -195,8 +195,8 @@ static void hdmic_enable_hpd(struct omap_dss_device *dssdev)
 		mutex_lock(&ddata->hpd_lock);
 		ddata->hpd_enabled = true;
 		mutex_unlock(&ddata->hpd_lock);
-	} else if (src->ops->hdmi.enable_hpd) {
-		src->ops->hdmi.enable_hpd(src);
+	} else if (src->ops->enable_hpd) {
+		src->ops->enable_hpd(src);
 	}
 }
 
@@ -209,8 +209,8 @@ static void hdmic_disable_hpd(struct omap_dss_device *dssdev)
 		mutex_lock(&ddata->hpd_lock);
 		ddata->hpd_enabled = false;
 		mutex_unlock(&ddata->hpd_lock);
-	} else if (src->ops->hdmi.disable_hpd) {
-		src->ops->hdmi.disable_hpd(src);
+	} else if (src->ops->disable_hpd) {
+		src->ops->disable_hpd(src);
 	}
 }
 
@@ -229,7 +229,7 @@ static int hdmic_set_infoframe(struct omap_dss_device *dssdev,
 	return src->ops->hdmi.set_infoframe(src, avi);
 }
 
-static const struct omap_dss_driver hdmic_driver = {
+static const struct omap_dss_device_ops hdmic_ops = {
 	.connect		= hdmic_connect,
 	.disconnect		= hdmic_disconnect,
 
@@ -246,8 +246,11 @@ static const struct omap_dss_driver hdmic_driver = {
 	.unregister_hpd_cb	= hdmic_unregister_hpd_cb,
 	.enable_hpd		= hdmic_enable_hpd,
 	.disable_hpd		= hdmic_disable_hpd,
-	.set_hdmi_mode		= hdmic_set_hdmi_mode,
-	.set_hdmi_infoframe	= hdmic_set_infoframe,
+
+	.hdmi = {
+		.set_hdmi_mode	= hdmic_set_hdmi_mode,
+		.set_infoframe	= hdmic_set_infoframe,
+	},
 };
 
 static irqreturn_t hdmic_hpd_isr(int irq, void *data)
@@ -309,7 +312,7 @@ static int hdmic_probe(struct platform_device *pdev)
 	ddata->vm = hdmic_default_vm;
 
 	dssdev = &ddata->dssdev;
-	dssdev->driver = &hdmic_driver;
+	dssdev->ops = &hdmic_ops;
 	dssdev->dev = &pdev->dev;
 	dssdev->type = OMAP_DISPLAY_TYPE_HDMI;
 	dssdev->owner = THIS_MODULE;

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

@@ -125,7 +125,7 @@ static int tpd_read_edid(struct omap_dss_device *dssdev,
 	if (!gpiod_get_value_cansleep(ddata->hpd_gpio))
 		return -ENODEV;
 
-	return src->ops->hdmi.read_edid(src, edid, len);
+	return src->ops->read_edid(src, edid, len);
 }
 
 static bool tpd_detect(struct omap_dss_device *dssdev)
@@ -205,14 +205,14 @@ static const struct omap_dss_device_ops tpd_ops = {
 	.disable		= tpd_disable,
 	.check_timings		= tpd_check_timings,
 	.set_timings		= tpd_set_timings,
+	.read_edid		= tpd_read_edid,
+	.detect			= tpd_detect,
+	.register_hpd_cb	= tpd_register_hpd_cb,
+	.unregister_hpd_cb	= tpd_unregister_hpd_cb,
+	.enable_hpd		= tpd_enable_hpd,
+	.disable_hpd		= tpd_disable_hpd,
 
 	.hdmi = {
-		.read_edid		= tpd_read_edid,
-		.detect			= tpd_detect,
-		.register_hpd_cb	= tpd_register_hpd_cb,
-		.unregister_hpd_cb	= tpd_unregister_hpd_cb,
-		.enable_hpd		= tpd_enable_hpd,
-		.disable_hpd		= tpd_disable_hpd,
 		.set_infoframe		= tpd_set_infoframe,
 		.set_hdmi_mode		= tpd_set_hdmi_mode,
 	},

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

@@ -122,7 +122,7 @@ static int panel_dpi_check_timings(struct omap_dss_device *dssdev,
 	return src->ops->check_timings(src, vm);
 }
 
-static const struct omap_dss_driver panel_dpi_ops = {
+static const struct omap_dss_device_ops panel_dpi_ops = {
 	.connect	= panel_dpi_connect,
 	.disconnect	= panel_dpi_disconnect,
 
@@ -196,7 +196,7 @@ static int panel_dpi_probe(struct platform_device *pdev)
 
 	dssdev = &ddata->dssdev;
 	dssdev->dev = &pdev->dev;
-	dssdev->driver = &panel_dpi_ops;
+	dssdev->ops = &panel_dpi_ops;
 	dssdev->type = OMAP_DISPLAY_TYPE_DPI;
 	dssdev->owner = THIS_MODULE;
 	dssdev->of_ports = BIT(0);

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

@@ -1179,18 +1179,21 @@ static void dsicm_get_size(struct omap_dss_device *dssdev,
 	*height = ddata->height_mm;
 }
 
-static const struct omap_dss_driver dsicm_ops = {
+static const struct omap_dss_device_ops dsicm_ops = {
 	.connect	= dsicm_connect,
 	.disconnect	= dsicm_disconnect,
 
 	.enable		= dsicm_enable,
 	.disable	= dsicm_disable,
 
+	.get_timings	= dsicm_get_timings,
+	.check_timings	= dsicm_check_timings,
+};
+
+static const struct omap_dss_driver dsicm_dss_driver = {
 	.update		= dsicm_update,
 	.sync		= dsicm_sync,
 
-	.get_timings	= dsicm_get_timings,
-	.check_timings	= dsicm_check_timings,
 	.get_size	= dsicm_get_size,
 
 	.enable_te	= dsicm_enable_te,
@@ -1299,7 +1302,8 @@ static int dsicm_probe(struct platform_device *pdev)
 
 	dssdev = &ddata->dssdev;
 	dssdev->dev = dev;
-	dssdev->driver = &dsicm_ops;
+	dssdev->ops = &dsicm_ops;
+	dssdev->driver = &dsicm_dss_driver;
 	dssdev->type = OMAP_DISPLAY_TYPE_DSI;
 	dssdev->owner = THIS_MODULE;
 	dssdev->of_ports = BIT(0);

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

@@ -199,7 +199,7 @@ static int lb035q02_check_timings(struct omap_dss_device *dssdev,
 	return src->ops->check_timings(src, vm);
 }
 
-static const struct omap_dss_driver lb035q02_ops = {
+static const struct omap_dss_device_ops lb035q02_ops = {
 	.connect	= lb035q02_connect,
 	.disconnect	= lb035q02_disconnect,
 
@@ -249,7 +249,7 @@ static int lb035q02_panel_spi_probe(struct spi_device *spi)
 
 	dssdev = &ddata->dssdev;
 	dssdev->dev = &spi->dev;
-	dssdev->driver = &lb035q02_ops;
+	dssdev->ops = &lb035q02_ops;
 	dssdev->type = OMAP_DISPLAY_TYPE_DPI;
 	dssdev->owner = THIS_MODULE;
 	dssdev->of_ports = BIT(0);

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

@@ -187,7 +187,7 @@ static int nec_8048_check_timings(struct omap_dss_device *dssdev,
 	return src->ops->check_timings(src, vm);
 }
 
-static const struct omap_dss_driver nec_8048_ops = {
+static const struct omap_dss_device_ops nec_8048_ops = {
 	.connect	= nec_8048_connect,
 	.disconnect	= nec_8048_disconnect,
 
@@ -239,7 +239,7 @@ static int nec_8048_probe(struct spi_device *spi)
 
 	dssdev = &ddata->dssdev;
 	dssdev->dev = &spi->dev;
-	dssdev->driver = &nec_8048_ops;
+	dssdev->ops = &nec_8048_ops;
 	dssdev->type = OMAP_DISPLAY_TYPE_DPI;
 	dssdev->owner = THIS_MODULE;
 	dssdev->of_ports = BIT(0);

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

@@ -161,7 +161,7 @@ static int sharp_ls_check_timings(struct omap_dss_device *dssdev,
 	return src->ops->check_timings(src, vm);
 }
 
-static const struct omap_dss_driver sharp_ls_ops = {
+static const struct omap_dss_device_ops sharp_ls_ops = {
 	.connect	= sharp_ls_connect,
 	.disconnect	= sharp_ls_disconnect,
 
@@ -247,7 +247,7 @@ static int sharp_ls_probe(struct platform_device *pdev)
 
 	dssdev = &ddata->dssdev;
 	dssdev->dev = &pdev->dev;
-	dssdev->driver = &sharp_ls_ops;
+	dssdev->ops = &sharp_ls_ops;
 	dssdev->type = OMAP_DISPLAY_TYPE_DPI;
 	dssdev->owner = THIS_MODULE;
 	dssdev->of_ports = BIT(0);

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

@@ -660,7 +660,7 @@ static int acx565akm_check_timings(struct omap_dss_device *dssdev,
 	return src->ops->check_timings(src, vm);
 }
 
-static const struct omap_dss_driver acx565akm_ops = {
+static const struct omap_dss_device_ops acx565akm_ops = {
 	.connect	= acx565akm_connect,
 	.disconnect	= acx565akm_disconnect,
 
@@ -762,7 +762,7 @@ static int acx565akm_probe(struct spi_device *spi)
 
 	dssdev = &ddata->dssdev;
 	dssdev->dev = &spi->dev;
-	dssdev->driver = &acx565akm_ops;
+	dssdev->ops = &acx565akm_ops;
 	dssdev->type = OMAP_DISPLAY_TYPE_SDI;
 	dssdev->owner = THIS_MODULE;
 	dssdev->of_ports = BIT(0);

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

@@ -330,7 +330,7 @@ static int td028ttec1_panel_check_timings(struct omap_dss_device *dssdev,
 	return src->ops->check_timings(src, vm);
 }
 
-static const struct omap_dss_driver td028ttec1_ops = {
+static const struct omap_dss_device_ops td028ttec1_ops = {
 	.connect	= td028ttec1_panel_connect,
 	.disconnect	= td028ttec1_panel_disconnect,
 
@@ -371,7 +371,7 @@ static int td028ttec1_panel_probe(struct spi_device *spi)
 
 	dssdev = &ddata->dssdev;
 	dssdev->dev = &spi->dev;
-	dssdev->driver = &td028ttec1_ops;
+	dssdev->ops = &td028ttec1_ops;
 	dssdev->type = OMAP_DISPLAY_TYPE_DPI;
 	dssdev->owner = THIS_MODULE;
 	dssdev->of_ports = BIT(0);

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

@@ -404,7 +404,7 @@ static int tpo_td043_check_timings(struct omap_dss_device *dssdev,
 	return src->ops->check_timings(src, vm);
 }
 
-static const struct omap_dss_driver tpo_td043_ops = {
+static const struct omap_dss_device_ops tpo_td043_ops = {
 	.connect	= tpo_td043_connect,
 	.disconnect	= tpo_td043_disconnect,
 
@@ -469,7 +469,7 @@ static int tpo_td043_probe(struct spi_device *spi)
 
 	dssdev = &ddata->dssdev;
 	dssdev->dev = &spi->dev;
-	dssdev->driver = &tpo_td043_ops;
+	dssdev->ops = &tpo_td043_ops;
 	dssdev->type = OMAP_DISPLAY_TYPE_DPI;
 	dssdev->owner = THIS_MODULE;
 	dssdev->of_ports = BIT(0);

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

@@ -198,11 +198,7 @@ int omapdss_device_connect(struct dss_device *dss,
 
 	dst->dss = dss;
 
-	if (dst->driver)
-		ret = dst->driver->connect(src, dst);
-	else
-		ret = dst->ops->connect(src, dst);
-
+	ret = dst->ops->connect(src, dst);
 	if (ret < 0) {
 		dst->dss = NULL;
 		return ret;
@@ -238,11 +234,7 @@ void omapdss_device_disconnect(struct omap_dss_device *src,
 
 	WARN_ON(dst->state != OMAP_DSS_DISPLAY_DISABLED);
 
-	if (dst->driver)
-		dst->driver->disconnect(src, dst);
-	else
-		dst->ops->disconnect(src, dst);
-
+	dst->ops->disconnect(src, dst);
 	dst->dss = NULL;
 }
 EXPORT_SYMBOL_GPL(omapdss_device_disconnect);

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

@@ -1553,7 +1553,7 @@ static void dss_shutdown(struct platform_device *pdev)
 
 	for_each_dss_display(dssdev) {
 		if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
-			dssdev->driver->disable(dssdev);
+			dssdev->ops->disable(dssdev);
 	}
 }
 

drivers/gpu/drm/omapdrm/dss/hdmi4.c

@@ -511,8 +511,9 @@ static const struct omap_dss_device_ops hdmi_ops = {
 	.check_timings		= hdmi_display_check_timing,
 	.set_timings		= hdmi_display_set_timing,
 
+	.read_edid		= hdmi_read_edid,
+
 	.hdmi = {
-		.read_edid		= hdmi_read_edid,
 		.lost_hotplug		= hdmi_lost_hotplug,
 		.set_infoframe		= hdmi_set_infoframe,
 		.set_hdmi_mode		= hdmi_set_hdmi_mode,

drivers/gpu/drm/omapdrm/dss/hdmi5.c

@@ -505,8 +505,9 @@ static const struct omap_dss_device_ops hdmi_ops = {
 	.check_timings		= hdmi_display_check_timing,
 	.set_timings		= hdmi_display_set_timing,
 
+	.read_edid		= hdmi_read_edid,
+
 	.hdmi = {
-		.read_edid		= hdmi_read_edid,
 		.set_infoframe		= hdmi_set_infoframe,
 		.set_hdmi_mode		= hdmi_set_hdmi_mode,
 	},

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

@@ -297,18 +297,7 @@ struct omap_dss_writeback_info {
 };
 
 struct omapdss_hdmi_ops {
-	int (*read_edid)(struct omap_dss_device *dssdev, u8 *buf, int len);
 	void (*lost_hotplug)(struct omap_dss_device *dssdev);
-	bool (*detect)(struct omap_dss_device *dssdev);
-
-	int (*register_hpd_cb)(struct omap_dss_device *dssdev,
-			       void (*cb)(void *cb_data,
-					  enum drm_connector_status status),
-			       void *cb_data);
-	void (*unregister_hpd_cb)(struct omap_dss_device *dssdev);
-	void (*enable_hpd)(struct omap_dss_device *dssdev);
-	void (*disable_hpd)(struct omap_dss_device *dssdev);
-
 	int (*set_hdmi_mode)(struct omap_dss_device *dssdev, bool hdmi_mode);
 	int (*set_infoframe)(struct omap_dss_device *dssdev,
 		const struct hdmi_avi_infoframe *avi);
@@ -376,9 +365,23 @@ struct omap_dss_device_ops {
 
 	int (*check_timings)(struct omap_dss_device *dssdev,
 			     struct videomode *vm);
+	void (*get_timings)(struct omap_dss_device *dssdev,
+			    struct videomode *vm);
 	void (*set_timings)(struct omap_dss_device *dssdev,
 			    struct videomode *vm);
 
+	bool (*detect)(struct omap_dss_device *dssdev);
+
+	int (*register_hpd_cb)(struct omap_dss_device *dssdev,
+			       void (*cb)(void *cb_data,
+					  enum drm_connector_status status),
+			       void *cb_data);
+	void (*unregister_hpd_cb)(struct omap_dss_device *dssdev);
+	void (*enable_hpd)(struct omap_dss_device *dssdev);
+	void (*disable_hpd)(struct omap_dss_device *dssdev);
+
+	int (*read_edid)(struct omap_dss_device *dssdev, u8 *buf, int len);
+
 	union {
 		const struct omapdss_hdmi_ops hdmi;
 		const struct omapdss_dsi_ops dsi;
@@ -440,14 +443,6 @@ struct omap_dss_device {
 };
 
 struct omap_dss_driver {
-	int (*connect)(struct omap_dss_device *src,
-		       struct omap_dss_device *dst);
-	void (*disconnect)(struct omap_dss_device *src,
-			   struct omap_dss_device *dst);
-
-	int (*enable)(struct omap_dss_device *display);
-	void (*disable)(struct omap_dss_device *display);
-
 	int (*update)(struct omap_dss_device *dssdev,
 			       u16 x, u16 y, u16 w, u16 h);
 	int (*sync)(struct omap_dss_device *dssdev);
@@ -459,29 +454,8 @@ struct omap_dss_driver {
 			void *buf, size_t size,
 			u16 x, u16 y, u16 w, u16 h);
 
-	int (*check_timings)(struct omap_dss_device *dssdev,
-			     struct videomode *vm);
-	void (*set_timings)(struct omap_dss_device *dssdev,
-			    struct videomode *vm);
-	void (*get_timings)(struct omap_dss_device *dssdev,
-			    struct videomode *vm);
 	void (*get_size)(struct omap_dss_device *dssdev,
 			 unsigned int *width, unsigned int *height);
-
-	int (*read_edid)(struct omap_dss_device *dssdev, u8 *buf, int len);
-	bool (*detect)(struct omap_dss_device *dssdev);
-
-	int (*register_hpd_cb)(struct omap_dss_device *dssdev,
-			       void (*cb)(void *cb_data,
-					  enum drm_connector_status status),
-			       void *cb_data);
-	void (*unregister_hpd_cb)(struct omap_dss_device *dssdev);
-	void (*enable_hpd)(struct omap_dss_device *dssdev);
-	void (*disable_hpd)(struct omap_dss_device *dssdev);
-
-	int (*set_hdmi_mode)(struct omap_dss_device *dssdev, bool hdmi_mode);
-	int (*set_hdmi_infoframe)(struct omap_dss_device *dssdev,
-		const struct hdmi_avi_infoframe *avi);
 };
 
 struct dss_device *omapdss_get_dss(void);

drivers/gpu/drm/omapdrm/omap_connector.c

@@ -62,11 +62,10 @@ static enum drm_connector_status omap_connector_detect(
 {
 	struct omap_connector *omap_connector = to_omap_connector(connector);
 	struct omap_dss_device *dssdev = omap_connector->dssdev;
-	const struct omap_dss_driver *dssdrv = dssdev->driver;
 	enum drm_connector_status ret;
 
-	if (dssdrv->detect) {
-		if (dssdrv->detect(dssdev))
+	if (dssdev->ops->detect) {
+		if (dssdev->ops->detect(dssdev))
 			ret = connector_status_connected;
 		else
 			ret = connector_status_disconnected;
@@ -91,8 +90,8 @@ static void omap_connector_destroy(struct drm_connector *connector)
 
 	DBG("%s", omap_connector->dssdev->name);
 	if (connector->polled == DRM_CONNECTOR_POLL_HPD &&
-	    dssdev->driver->unregister_hpd_cb) {
-		dssdev->driver->unregister_hpd_cb(dssdev);
+	    dssdev->ops->unregister_hpd_cb) {
+		dssdev->ops->unregister_hpd_cb(dssdev);
 	}
 	drm_connector_unregister(connector);
 	drm_connector_cleanup(connector);
@@ -107,7 +106,6 @@ static int omap_connector_get_modes(struct drm_connector *connector)
 {
 	struct omap_connector *omap_connector = to_omap_connector(connector);
 	struct omap_dss_device *dssdev = omap_connector->dssdev;
-	const struct omap_dss_driver *dssdrv = dssdev->driver;
 	struct drm_device *dev = connector->dev;
 	int n = 0;
 
@@ -118,13 +116,13 @@ static int omap_connector_get_modes(struct drm_connector *connector)
 	 * LCD panels) we just return a single mode corresponding to the
 	 * currently configured timings:
 	 */
-	if (dssdrv->read_edid) {
+	if (dssdev->ops->read_edid) {
 		void *edid = kzalloc(MAX_EDID, GFP_KERNEL);
 
 		if (!edid)
 			return 0;
 
-		if ((dssdrv->read_edid(dssdev, edid, MAX_EDID) > 0) &&
+		if ((dssdev->ops->read_edid(dssdev, edid, MAX_EDID) > 0) &&
 				drm_edid_is_valid(edid)) {
 			drm_connector_update_edid_property(
 					connector, edid);
@@ -145,7 +143,7 @@ static int omap_connector_get_modes(struct drm_connector *connector)
 		if (!mode)
 			return 0;
 
-		dssdrv->get_timings(dssdev, &vm);
+		dssdev->ops->get_timings(dssdev, &vm);
 
 		drm_display_mode_from_videomode(&vm, mode);
 
@@ -153,8 +151,8 @@ static int omap_connector_get_modes(struct drm_connector *connector)
 		drm_mode_set_name(mode);
 		drm_mode_probed_add(connector, mode);
 
-		if (dssdrv->get_size) {
-			dssdrv->get_size(dssdev,
+		if (dssdev->driver && dssdev->driver->get_size) {
+			dssdev->driver->get_size(dssdev,
 					 &connector->display_info.width_mm,
 					 &connector->display_info.height_mm);
 		}
@@ -170,7 +168,6 @@ static int omap_connector_mode_valid(struct drm_connector *connector,
 {
 	struct omap_connector *omap_connector = to_omap_connector(connector);
 	struct omap_dss_device *dssdev = omap_connector->dssdev;
-	const struct omap_dss_driver *dssdrv = dssdev->driver;
 	struct videomode vm = {0};
 	struct drm_device *dev = connector->dev;
 	struct drm_display_mode *new_mode;
@@ -184,12 +181,12 @@ static int omap_connector_mode_valid(struct drm_connector *connector,
 	 * a fixed resolution panel, check if the timings match with the
 	 * panel's timings
 	 */
-	if (dssdrv->check_timings) {
-		r = dssdrv->check_timings(dssdev, &vm);
+	if (dssdev->ops->check_timings) {
+		r = dssdev->ops->check_timings(dssdev, &vm);
 	} else {
 		struct videomode t = {0};
 
-		dssdrv->get_timings(dssdev, &t);
+		dssdev->ops->get_timings(dssdev, &t);
 
 		/*
 		 * Ignore the flags, as we don't get them from
@@ -268,10 +265,10 @@ struct drm_connector *omap_connector_init(struct drm_device *dev,
 				connector_type);
 	drm_connector_helper_add(connector, &omap_connector_helper_funcs);
 
-	if (dssdev->driver->register_hpd_cb) {
-		int ret = dssdev->driver->register_hpd_cb(dssdev,
-							  omap_connector_hpd_cb,
-							  omap_connector);
+	if (dssdev->ops->register_hpd_cb) {
+		int ret = dssdev->ops->register_hpd_cb(dssdev,
+						       omap_connector_hpd_cb,
+						       omap_connector);
 		if (!ret)
 			hpd_supported = true;
 		else if (ret != -ENOTSUPP)
@@ -281,7 +278,7 @@ struct drm_connector *omap_connector_init(struct drm_device *dev,
 
 	if (hpd_supported)
 		connector->polled = DRM_CONNECTOR_POLL_HPD;
-	else if (dssdev->driver->detect)
+	else if (dssdev->ops->detect)
 		connector->polled = DRM_CONNECTOR_POLL_CONNECT |
 				    DRM_CONNECTOR_POLL_DISCONNECT;
 	else

drivers/gpu/drm/omapdrm/omap_crtc.c

@@ -458,7 +458,7 @@ static void omap_crtc_mode_set_nofb(struct drm_crtc *crtc)
 			if (dssdev) {
 				struct videomode vm = {0};
 
-				dssdev->driver->get_timings(dssdev, &vm);
+				dssdev->ops->get_timings(dssdev, &vm);
 
 				omap_crtc->vm.flags |= vm.flags & flags_mask;
 			}

drivers/gpu/drm/omapdrm/omap_drv.c

@@ -378,8 +378,8 @@ static void omap_modeset_enable_external_hpd(struct drm_device *ddev)
 	for (i = 0; i < priv->num_pipes; i++) {
 		struct omap_dss_device *display = priv->pipes[i].display;
 
-		if (display->driver->enable_hpd)
-			display->driver->enable_hpd(display);
+		if (display->ops->enable_hpd)
+			display->ops->enable_hpd(display);
 	}
 }
 
@@ -394,8 +394,8 @@ static void omap_modeset_disable_external_hpd(struct drm_device *ddev)
 	for (i = 0; i < priv->num_pipes; i++) {
 		struct omap_dss_device *display = priv->pipes[i].display;
 
-		if (display->driver->disable_hpd)
-			display->driver->disable_hpd(display);
+		if (display->ops->disable_hpd)
+			display->ops->disable_hpd(display);
 	}
 }
 
@@ -724,7 +724,7 @@ static int omap_drm_suspend_all_displays(struct drm_device *ddev)
 		struct omap_dss_device *display = priv->pipes[i].display;
 
 		if (display->state == OMAP_DSS_DISPLAY_ACTIVE) {
-			display->driver->disable(display);
+			display->ops->disable(display);
 			display->activate_after_resume = true;
 		} else {
 			display->activate_after_resume = false;
@@ -743,7 +743,7 @@ static int omap_drm_resume_all_displays(struct drm_device *ddev)
 		struct omap_dss_device *display = priv->pipes[i].display;
 
 		if (display->activate_after_resume) {
-			display->driver->enable(display);
+			display->ops->enable(display);
 			display->activate_after_resume = false;
 		}
 	}

drivers/gpu/drm/omapdrm/omap_encoder.c

@@ -77,16 +77,16 @@ static void omap_encoder_mode_set(struct drm_encoder *encoder,
 		}
 	}
 
-	if (dssdev->driver->set_hdmi_mode)
-		dssdev->driver->set_hdmi_mode(dssdev, hdmi_mode);
+	if (dssdev->ops->hdmi.set_hdmi_mode)
+		dssdev->ops->hdmi.set_hdmi_mode(dssdev, hdmi_mode);
 
-	if (hdmi_mode && dssdev->driver->set_hdmi_infoframe) {
+	if (hdmi_mode && dssdev->ops->hdmi.set_infoframe) {
 		struct hdmi_avi_infoframe avi;
 
 		r = drm_hdmi_avi_infoframe_from_display_mode(&avi, adjusted_mode,
 							     false);
 		if (r == 0)
-			dssdev->driver->set_hdmi_infoframe(dssdev, &avi);
+			dssdev->ops->hdmi.set_infoframe(dssdev, &avi);
 	}
 }
 
@@ -94,9 +94,8 @@ static void omap_encoder_disable(struct drm_encoder *encoder)
 {
 	struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
 	struct omap_dss_device *dssdev = omap_encoder->dssdev;
-	const struct omap_dss_driver *dssdrv = dssdev->driver;
 
-	dssdrv->disable(dssdev);
+	dssdev->ops->disable(dssdev);
 }
 
 static int omap_encoder_update(struct drm_encoder *encoder,
@@ -106,15 +105,14 @@ static int omap_encoder_update(struct drm_encoder *encoder,
 	struct drm_device *dev = encoder->dev;
 	struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
 	struct omap_dss_device *dssdev = omap_encoder->dssdev;
-	const struct omap_dss_driver *dssdrv = dssdev->driver;
 	int ret;
 
-	if (dssdrv->check_timings) {
-		ret = dssdrv->check_timings(dssdev, vm);
+	if (dssdev->ops->check_timings) {
+		ret = dssdev->ops->check_timings(dssdev, vm);
 	} else {
 		struct videomode t = {0};
 
-		dssdrv->get_timings(dssdev, &t);
+		dssdev->ops->get_timings(dssdev, &t);
 
 		if (memcmp(vm, &t, sizeof(*vm)))
 			ret = -EINVAL;
@@ -127,8 +125,8 @@ static int omap_encoder_update(struct drm_encoder *encoder,
 		return ret;
 	}
 
-	if (dssdrv->set_timings)
-		dssdrv->set_timings(dssdev, vm);
+	if (dssdev->ops->set_timings)
+		dssdev->ops->set_timings(dssdev, vm);
 
 	return 0;
 }
@@ -137,13 +135,12 @@ static void omap_encoder_enable(struct drm_encoder *encoder)
 {
 	struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
 	struct omap_dss_device *dssdev = omap_encoder->dssdev;
-	const struct omap_dss_driver *dssdrv = dssdev->driver;
 	int r;
 
 	omap_encoder_update(encoder, omap_crtc_channel(encoder->crtc),
 			    omap_crtc_timings(encoder->crtc));
 
-	r = dssdrv->enable(dssdev);
+	r = dssdev->ops->enable(dssdev);
 	if (r)
 		dev_err(encoder->dev->dev,
 			"Failed to enable display '%s': %d\n",