Subject: [PATCH v1 17/26] drm/panel: raydium-rm68200: use drm_panel backlight support

From: Sam Ravnborg <[email-masked]>
Date: Mon, 2 Dec 2019 20:32:21 +0100

Use the backlight support in drm_panel to simplify the driver

Signed-off-by: Sam Ravnborg <[email-masked]>
Cc: Thierry Reding <[email-masked]>
Cc: Sam Ravnborg <[email-masked]>
---
 drivers/gpu/drm/panel/panel-raydium-rm68200.c | 15 +++++----------
 1 file changed, 5 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-raydium-rm68200.c b/drivers/gpu/drm/panel/panel-raydium-rm68200.c
index d6a03328e594..e8982948e0ea 100644
--- a/drivers/gpu/drm/panel/panel-raydium-rm68200.c
+++ b/drivers/gpu/drm/panel/panel-raydium-rm68200.c
@@ -6,9 +6,9 @@
  *          Yannick Fertre <[email-masked]>
  */
 
-#include <linux/backlight.h>
 #include <linux/delay.h>
 #include <linux/gpio/consumer.h>
+#include <linux/mod_devicetable.h>
 #include <linux/module.h>
 #include <linux/regulator/consumer.h>
 
@@ -78,7 +78,6 @@ struct rm68200 {
 	struct drm_panel panel;
 	struct gpio_desc *reset_gpio;
 	struct regulator *supply;
-	struct backlight_device *backlight;
 	bool prepared;
 	bool enabled;
 };
@@ -242,8 +241,6 @@ static int rm68200_disable(struct drm_panel *panel)
 	if (!ctx->enabled)
 		return 0;
 
-	backlight_disable(ctx->backlight);
-
 	ctx->enabled = false;
 
 	return 0;
@@ -328,8 +325,6 @@ static int rm68200_enable(struct drm_panel *panel)
 	if (ctx->enabled)
 		return 0;
 
-	backlight_enable(ctx->backlight);
-
 	ctx->enabled = true;
 
 	return 0;
@@ -392,10 +387,6 @@ static int rm68200_probe(struct mipi_dsi_device *dsi)
 		return ret;
 	}
 
-	ctx->backlight = devm_of_find_backlight(dev);
-	if (IS_ERR(ctx->backlight))
-		return PTR_ERR(ctx->backlight);
-
 	mipi_dsi_set_drvdata(dsi, ctx);
 
 	ctx->dev = dev;
@@ -408,6 +399,10 @@ static int rm68200_probe(struct mipi_dsi_device *dsi)
 	drm_panel_init(&ctx->panel, dev, &rm68200_drm_funcs,
 		       DRM_MODE_CONNECTOR_DSI);
 
+	ret = drm_panel_of_backlight(&ctx->panel);
+	if (ret)
+		return ret;
+
 	drm_panel_add(&ctx->panel);
 
 	ret = mipi_dsi_attach(dsi);
-- 
2.20.1

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