[PATCH v2 18/25] drm/panel: ronbo-rb070d30: use drm_panel backlight support

[Sam Ravnborg <sam@xxxxxxxxxxxx>]

Use the backlight support in drm_panel to simplify the driver

Signed-off-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Cc: Thierry Reding <thierry.reding@xxxxxxxxx>
Cc: Sam Ravnborg <sam@xxxxxxxxxxxx>
---
 drivers/gpu/drm/panel/panel-ronbo-rb070d30.c | 19 +++----------------
 1 file changed, 3 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-ronbo-rb070d30.c b/drivers/gpu/drm/panel/panel-ronbo-rb070d30.c
index 746a3a221100..ef18559e237e 100644
--- a/drivers/gpu/drm/panel/panel-ronbo-rb070d30.c
+++ b/drivers/gpu/drm/panel/panel-ronbo-rb070d30.c
@@ -7,7 +7,6 @@
  * This file based on panel-ilitek-ili9881c.c
  */
 
-#include <linux/backlight.h>
 #include <linux/delay.h>
 #include <linux/device.h>
 #include <linux/err.h>
@@ -29,7 +28,6 @@
 struct rb070d30_panel {
 	struct drm_panel panel;
 	struct mipi_dsi_device *dsi;
-	struct backlight_device *backlight;
 	struct regulator *supply;
 
 	struct {
@@ -84,22 +82,13 @@ static int rb070d30_panel_enable(struct drm_panel *panel)
 	if (ret)
 		return ret;
 
-	ret = backlight_enable(ctx->backlight);
-	if (ret)
-		goto out;
-
 	return 0;
-
-out:
-	mipi_dsi_dcs_enter_sleep_mode(ctx->dsi);
-	return ret;
 }
 
 static int rb070d30_panel_disable(struct drm_panel *panel)
 {
 	struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);
 
-	backlight_disable(ctx->backlight);
 	return mipi_dsi_dcs_enter_sleep_mode(ctx->dsi);
 }
 
@@ -208,11 +197,9 @@ static int rb070d30_panel_dsi_probe(struct mipi_dsi_device *dsi)
 		return PTR_ERR(ctx->gpios.shlr);
 	}
 
-	ctx->backlight = devm_of_find_backlight(&dsi->dev);
-	if (IS_ERR(ctx->backlight)) {
-		DRM_DEV_ERROR(&dsi->dev, "Couldn't get our backlight\n");
-		return PTR_ERR(ctx->backlight);
-	}
+	ret = drm_panel_of_backlight(&ctx->panel);
+	if (ret)
+		return ret;
 
 	ret = drm_panel_add(&ctx->panel);
 	if (ret < 0)
-- 
2.20.1