drm/omap: dss: Constify omap_dss_driver operations structure

The structure contains function pointers that don't need to be modified.
Make all its instances const to improve security.

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

@@ -154,7 +154,7 @@ static int tvc_check_timings(struct omap_dss_device *dssdev,
 	return in->ops.atv->check_timings(in, vm);
 }
 
-static struct omap_dss_driver tvc_driver = {
+static const struct omap_dss_driver tvc_driver = {
 	.connect		= tvc_connect,
 	.disconnect		= tvc_disconnect,
 

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

@@ -297,7 +297,7 @@ static void dvic_disable_hpd(struct omap_dss_device *dssdev)
 	mutex_unlock(&ddata->hpd_lock);
 }
 
-static struct omap_dss_driver dvic_driver = {
+static const struct omap_dss_driver dvic_driver = {
 	.connect	= dvic_connect,
 	.disconnect	= dvic_disconnect,
 

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

@@ -269,7 +269,7 @@ static int hdmic_set_infoframe(struct omap_dss_device *dssdev,
 	return in->ops.hdmi->set_infoframe(in, avi);
 }
 
-static struct omap_dss_driver hdmic_driver = {
+static const struct omap_dss_driver hdmic_driver = {
 	.connect		= hdmic_connect,
 	.disconnect		= hdmic_disconnect,
 

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

@@ -153,7 +153,7 @@ static int panel_dpi_check_timings(struct omap_dss_device *dssdev,
 	return in->ops.dpi->check_timings(in, vm);
 }
 
-static struct omap_dss_driver panel_dpi_ops = {
+static const struct omap_dss_driver panel_dpi_ops = {
 	.connect	= panel_dpi_connect,
 	.disconnect	= panel_dpi_disconnect,
 

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

@@ -1210,7 +1210,7 @@ static void dsicm_get_size(struct omap_dss_device *dssdev,
 	*height = ddata->height_mm;
 }
 
-static struct omap_dss_driver dsicm_ops = {
+static const struct omap_dss_driver dsicm_ops = {
 	.connect	= dsicm_connect,
 	.disconnect	= dsicm_disconnect,
 

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

@@ -228,7 +228,7 @@ static int lb035q02_check_timings(struct omap_dss_device *dssdev,
 	return in->ops.dpi->check_timings(in, vm);
 }
 
-static struct omap_dss_driver lb035q02_ops = {
+static const struct omap_dss_driver lb035q02_ops = {
 	.connect	= lb035q02_connect,
 	.disconnect	= lb035q02_disconnect,
 

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

@@ -222,7 +222,7 @@ static int nec_8048_check_timings(struct omap_dss_device *dssdev,
 	return in->ops.dpi->check_timings(in, vm);
 }
 
-static struct omap_dss_driver nec_8048_ops = {
+static const struct omap_dss_driver nec_8048_ops = {
 	.connect	= nec_8048_connect,
 	.disconnect	= nec_8048_disconnect,
 

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

@@ -192,7 +192,7 @@ static int sharp_ls_check_timings(struct omap_dss_device *dssdev,
 	return in->ops.dpi->check_timings(in, vm);
 }
 
-static struct omap_dss_driver sharp_ls_ops = {
+static const struct omap_dss_driver sharp_ls_ops = {
 	.connect	= sharp_ls_connect,
 	.disconnect	= sharp_ls_disconnect,
 

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

@@ -693,7 +693,7 @@ static int acx565akm_check_timings(struct omap_dss_device *dssdev,
 	return in->ops.sdi->check_timings(in, vm);
 }
 
-static struct omap_dss_driver acx565akm_ops = {
+static const struct omap_dss_driver acx565akm_ops = {
 	.connect	= acx565akm_connect,
 	.disconnect	= acx565akm_disconnect,
 

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

@@ -362,7 +362,7 @@ static int td028ttec1_panel_check_timings(struct omap_dss_device *dssdev,
 	return in->ops.dpi->check_timings(in, vm);
 }
 
-static struct omap_dss_driver td028ttec1_ops = {
+static const struct omap_dss_driver td028ttec1_ops = {
 	.connect	= td028ttec1_panel_connect,
 	.disconnect	= td028ttec1_panel_disconnect,
 

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

@@ -456,7 +456,7 @@ static int tpo_td043_check_timings(struct omap_dss_device *dssdev,
 	return in->ops.dpi->check_timings(in, vm);
 }
 
-static struct omap_dss_driver tpo_td043_ops = {
+static const struct omap_dss_driver tpo_td043_ops = {
 	.connect	= tpo_td043_connect,
 	.disconnect	= tpo_td043_disconnect,
 

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

@@ -466,7 +466,7 @@ struct omap_dss_device {
 
 	const char *name;
 
-	struct omap_dss_driver *driver;
+	const struct omap_dss_driver *driver;
 
 	union {
 		const struct omapdss_dpi_ops *dpi;

drivers/gpu/drm/omapdrm/omap_connector.c

@@ -62,7 +62,7 @@ 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;
-	struct omap_dss_driver *dssdrv = dssdev->driver;
+	const struct omap_dss_driver *dssdrv = dssdev->driver;
 	enum drm_connector_status ret;
 
 	if (dssdrv->detect) {
@@ -107,7 +107,7 @@ 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;
-	struct omap_dss_driver *dssdrv = dssdev->driver;
+	const struct omap_dss_driver *dssdrv = dssdev->driver;
 	struct drm_device *dev = connector->dev;
 	int n = 0;
 
@@ -170,7 +170,7 @@ 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;
-	struct omap_dss_driver *dssdrv = dssdev->driver;
+	const struct omap_dss_driver *dssdrv = dssdev->driver;
 	struct videomode vm = {0};
 	struct drm_device *dev = connector->dev;
 	struct drm_display_mode *new_mode;

drivers/gpu/drm/omapdrm/omap_encoder.c

@@ -94,7 +94,7 @@ 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;
-	struct omap_dss_driver *dssdrv = dssdev->driver;
+	const struct omap_dss_driver *dssdrv = dssdev->driver;
 
 	dssdrv->disable(dssdev);
 }
@@ -106,7 +106,7 @@ 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;
-	struct omap_dss_driver *dssdrv = dssdev->driver;
+	const struct omap_dss_driver *dssdrv = dssdev->driver;
 	int ret;
 
 	if (dssdrv->check_timings) {
@@ -137,7 +137,7 @@ 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;
-	struct omap_dss_driver *dssdrv = dssdev->driver;
+	const struct omap_dss_driver *dssdrv = dssdev->driver;
 	int r;
 
 	omap_encoder_update(encoder, omap_crtc_channel(encoder->crtc),