drm/rockchip: dw_hdmi: Use devm_regulator_get_enable()

The regulators are only enabled at bind() and disabled at unbind(),
hence replace the boilerplate code by making use of
devm_regulator_get_enable() helper.
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20240813-dw-hdmi-rockchip-cleanup-v1-3-b3e73b5f4fd6@collabora.com

drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c

@@ -77,8 +77,6 @@ struct rockchip_hdmi {
 	struct clk *ref_clk;
 	struct clk *grf_clk;
 	struct dw_hdmi *hdmi;
-	struct regulator *avdd_0v9;
-	struct regulator *avdd_1v8;
 	struct phy *phy;
 };
 
@@ -236,15 +234,13 @@ static int rockchip_hdmi_parse_dt(struct rockchip_hdmi *hdmi)
 		return ret;
 	}
 
-	hdmi->avdd_0v9 = devm_regulator_get(hdmi->dev, "avdd-0v9");
-	if (IS_ERR(hdmi->avdd_0v9))
-		return PTR_ERR(hdmi->avdd_0v9);
+	ret = devm_regulator_get_enable(hdmi->dev, "avdd-0v9");
+	if (ret)
+		return ret;
 
-	hdmi->avdd_1v8 = devm_regulator_get(hdmi->dev, "avdd-1v8");
-	if (IS_ERR(hdmi->avdd_1v8))
-		return PTR_ERR(hdmi->avdd_1v8);
+	ret = devm_regulator_get_enable(hdmi->dev, "avdd-1v8");
 
-	return 0;
+	return ret;
 }
 
 static enum drm_mode_status
@@ -602,18 +598,6 @@ static int dw_hdmi_rockchip_bind(struct device *dev, struct device *master,
 		return ret;
 	}
 
-	ret = regulator_enable(hdmi->avdd_0v9);
-	if (ret) {
-		drm_err(hdmi, "failed to enable avdd0v9: %d\n", ret);
-		goto err_avdd_0v9;
-	}
-
-	ret = regulator_enable(hdmi->avdd_1v8);
-	if (ret) {
-		drm_err(hdmi, "failed to enable avdd1v8: %d\n", ret);
-		goto err_avdd_1v8;
-	}
-
 	if (hdmi->chip_data == &rk3568_chip_data) {
 		regmap_write(hdmi->regmap, RK3568_GRF_VO_CON1,
 			     HIWORD_UPDATE(RK3568_HDMI_SDAIN_MSK |
@@ -642,10 +626,7 @@ static int dw_hdmi_rockchip_bind(struct device *dev, struct device *master,
 
 err_bind:
 	drm_encoder_cleanup(encoder);
-	regulator_disable(hdmi->avdd_1v8);
-err_avdd_1v8:
-	regulator_disable(hdmi->avdd_0v9);
-err_avdd_0v9:
+
 	return ret;
 }
 
@@ -656,9 +637,6 @@ static void dw_hdmi_rockchip_unbind(struct device *dev, struct device *master,
 
 	dw_hdmi_unbind(hdmi->hdmi);
 	drm_encoder_cleanup(&hdmi->encoder.encoder);
-
-	regulator_disable(hdmi->avdd_1v8);
-	regulator_disable(hdmi->avdd_0v9);
 }
 
 static const struct component_ops dw_hdmi_rockchip_ops = {