4 files changed, 21 insertions, 90 deletions

diff --git a/drivers/gpu/drm/panel/panel-innolux-p079zca.c b/drivers/gpu/drm/panel/panel-innolux-p079zca.c
index 6ba93449fcfb..57df39b5c589 100644
--- a/drivers/gpu/drm/panel/panel-innolux-p079zca.c
+++ b/drivers/gpu/drm/panel/panel-innolux-p079zca.c
@@ -45,8 +45,7 @@ static int innolux_panel_disable(struct drm_panel *panel)
 	if (!innolux->enabled)
 		return 0;
 
-	innolux->backlight->props.power = FB_BLANK_POWERDOWN;
-	backlight_update_status(innolux->backlight);
+	backlight_disable(innolux->backlight);
 
 	err = mipi_dsi_dcs_set_display_off(innolux->link);
 	if (err < 0)
@@ -151,8 +150,7 @@ static int innolux_panel_enable(struct drm_panel *panel)
 	if (innolux->enabled)
 		return 0;
 
-	innolux->backlight->props.power = FB_BLANK_UNBLANK;
-	ret = backlight_update_status(innolux->backlight);
+	ret = backlight_enable(innolux->backlight);
 	if (ret) {
 		DRM_DEV_ERROR(panel->drm->dev,
 			      "Failed to enable backlight %d\n", ret);
@@ -217,7 +215,6 @@ MODULE_DEVICE_TABLE(of, innolux_of_match);
 static int innolux_panel_add(struct innolux_panel *innolux)
 {
 	struct device *dev = &innolux->link->dev;
-	struct device_node *np;
 	int err;
 
 	innolux->supply = devm_regulator_get(dev, "power");
@@ -232,37 +229,22 @@ static int innolux_panel_add(struct innolux_panel *innolux)
 		innolux->enable_gpio = NULL;
 	}
 
-	np = of_parse_phandle(dev->of_node, "backlight", 0);
-	if (np) {
-		innolux->backlight = of_find_backlight_by_node(np);
-		of_node_put(np);
+	innolux->backlight = devm_of_find_backlight(dev);
 
-		if (!innolux->backlight)
-			return -EPROBE_DEFER;
-	}
+	if (IS_ERR(innolux->backlight))
+		return PTR_ERR(innolux->backlight);
 
 	drm_panel_init(&innolux->base);
 	innolux->base.funcs = &innolux_panel_funcs;
 	innolux->base.dev = &innolux->link->dev;
 
-	err = drm_panel_add(&innolux->base);
-	if (err < 0)
-		goto put_backlight;
-
-	return 0;
-
-put_backlight:
-	put_device(&innolux->backlight->dev);
-
-	return err;
+	return drm_panel_add(&innolux->base);
 }
 
 static void innolux_panel_del(struct innolux_panel *innolux)
 {
 	if (innolux->base.dev)
 		drm_panel_remove(&innolux->base);
-
-	put_device(&innolux->backlight->dev);
 }
 
 static int innolux_panel_probe(struct mipi_dsi_device *dsi)
diff --git a/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c b/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c
index 5b2340ef74ed..0a94ab79a6c0 100644
--- a/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c
+++ b/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c
@@ -192,8 +192,7 @@ static int jdi_panel_disable(struct drm_panel *panel)
 	if (!jdi->enabled)
 		return 0;
 
-	jdi->backlight->props.power = FB_BLANK_POWERDOWN;
-	backlight_update_status(jdi->backlight);
+	backlight_disable(jdi->backlight);
 
 	jdi->enabled = false;
 
@@ -289,8 +288,7 @@ static int jdi_panel_enable(struct drm_panel *panel)
 	if (jdi->enabled)
 		return 0;
 
-	jdi->backlight->props.power = FB_BLANK_UNBLANK;
-	backlight_update_status(jdi->backlight);
+	backlight_enable(jdi->backlight);
 
 	jdi->enabled = true;
 
diff --git a/drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c b/drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c
index 3cce3ca19601..6bf8730f1a21 100644
--- a/drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c
+++ b/drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c
@@ -96,10 +96,7 @@ static int sharp_panel_disable(struct drm_panel *panel)
 	if (!sharp->enabled)
 		return 0;
 
-	if (sharp->backlight) {
-		sharp->backlight->props.power = FB_BLANK_POWERDOWN;
-		backlight_update_status(sharp->backlight);
-	}
+	backlight_disable(sharp->backlight);
 
 	sharp->enabled = false;
 
@@ -263,10 +260,7 @@ static int sharp_panel_enable(struct drm_panel *panel)
 	if (sharp->enabled)
 		return 0;
 
-	if (sharp->backlight) {
-		sharp->backlight->props.power = FB_BLANK_UNBLANK;
-		backlight_update_status(sharp->backlight);
-	}
+	backlight_enable(sharp->backlight);
 
 	sharp->enabled = true;
 
@@ -324,8 +318,7 @@ MODULE_DEVICE_TABLE(of, sharp_of_match);
 
 static int sharp_panel_add(struct sharp_panel *sharp)
 {
-	struct device_node *np;
-	int err;
+	struct device *dev = &sharp->link1->dev;
 
 	sharp->mode = &default_mode;
 
@@ -333,30 +326,16 @@ static int sharp_panel_add(struct sharp_panel *sharp)
 	if (IS_ERR(sharp->supply))
 		return PTR_ERR(sharp->supply);
 
-	np = of_parse_phandle(sharp->link1->dev.of_node, "backlight", 0);
-	if (np) {
-		sharp->backlight = of_find_backlight_by_node(np);
-		of_node_put(np);
+	sharp->backlight = devm_of_find_backlight(dev);
 
-		if (!sharp->backlight)
-			return -EPROBE_DEFER;
-	}
+	if (IS_ERR(sharp->backlight))
+		return PTR_ERR(sharp->backlight);
 
 	drm_panel_init(&sharp->base);
 	sharp->base.funcs = &sharp_panel_funcs;
 	sharp->base.dev = &sharp->link1->dev;
 
-	err = drm_panel_add(&sharp->base);
-	if (err < 0)
-		goto put_backlight;
-
-	return 0;
-
-put_backlight:
-	if (sharp->backlight)
-		put_device(&sharp->backlight->dev);
-
-	return err;
+	return drm_panel_add(&sharp->base);
 }
 
 static void sharp_panel_del(struct sharp_panel *sharp)
@@ -364,9 +343,6 @@ static void sharp_panel_del(struct sharp_panel *sharp)
 	if (sharp->base.dev)
 		drm_panel_remove(&sharp->base);
 
-	if (sharp->backlight)
-		put_device(&sharp->backlight->dev);
-
 	if (sharp->link2)
 		put_device(&sharp->link2->dev);
 }
diff --git a/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c b/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c
index 3aeb0bda4947..494aa9b1628a 100644
--- a/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c
+++ b/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c
@@ -117,10 +117,7 @@ static int sharp_nt_panel_disable(struct drm_panel *panel)
 	if (!sharp_nt->enabled)
 		return 0;
 
-	if (sharp_nt->backlight) {
-		sharp_nt->backlight->props.power = FB_BLANK_POWERDOWN;
-		backlight_update_status(sharp_nt->backlight);
-	}
+	backlight_disable(sharp_nt->backlight);
 
 	sharp_nt->enabled = false;
 
@@ -203,10 +200,7 @@ static int sharp_nt_panel_enable(struct drm_panel *panel)
 	if (sharp_nt->enabled)
 		return 0;
 
-	if (sharp_nt->backlight) {
-		sharp_nt->backlight->props.power = FB_BLANK_UNBLANK;
-		backlight_update_status(sharp_nt->backlight);
-	}
+	backlight_enable(sharp_nt->backlight);
 
 	sharp_nt->enabled = true;
 
@@ -259,8 +253,6 @@ static const struct drm_panel_funcs sharp_nt_panel_funcs = {
 static int sharp_nt_panel_add(struct sharp_nt_panel *sharp_nt)
 {
 	struct device *dev = &sharp_nt->dsi->dev;
-	struct device_node *np;
-	int ret;
 
 	sharp_nt->mode = &default_mode;
 
@@ -277,39 +269,22 @@ static int sharp_nt_panel_add(struct sharp_nt_panel *sharp_nt)
 		gpiod_set_value(sharp_nt->reset_gpio, 0);
 	}
 
-	np = of_parse_phandle(dev->of_node, "backlight", 0);
-	if (np) {
-		sharp_nt->backlight = of_find_backlight_by_node(np);
-		of_node_put(np);
+	sharp_nt->backlight = devm_of_find_backlight(dev);
 
-		if (!sharp_nt->backlight)
-			return -EPROBE_DEFER;
-	}
+	if (IS_ERR(sharp_nt->backlight))
+		return PTR_ERR(sharp_nt->backlight);
 
 	drm_panel_init(&sharp_nt->base);
 	sharp_nt->base.funcs = &sharp_nt_panel_funcs;
 	sharp_nt->base.dev = &sharp_nt->dsi->dev;
 
-	ret = drm_panel_add(&sharp_nt->base);
-	if (ret < 0)
-		goto put_backlight;
-
-	return 0;
-
-put_backlight:
-	if (sharp_nt->backlight)
-		put_device(&sharp_nt->backlight->dev);
-
-	return ret;
+	return drm_panel_add(&sharp_nt->base);
 }
 
 static void sharp_nt_panel_del(struct sharp_nt_panel *sharp_nt)
 {
 	if (sharp_nt->base.dev)
 		drm_panel_remove(&sharp_nt->base);
-
-	if (sharp_nt->backlight)
-		put_device(&sharp_nt->backlight->dev);
 }
 
 static int sharp_nt_panel_probe(struct mipi_dsi_device *dsi)