linux-kernel - [PATCH] drm/rockchip: Use dev_err

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Message-ID: <20250515203554564-j1jBXUXR6bdiN6zARicC@zte.com.cn>
Date: Thu, 15 May 2025 20:35:54 +0800 (CST)
From: <long.yunjian@....com.cn>
To: <hjc@...k-chips.com>
Cc: <heiko@...ech.de>, <andy.yan@...k-chips.com>,
        <maarten.lankhorst@...ux.intel.com>, <mripard@...nel.org>,
        <tzimmermann@...e.de>, <airlied@...il.com>, <simona@...ll.ch>,
        <dri-devel@...ts.freedesktop.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-rockchip@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        <fang.yumeng@....com.cn>, <mou.yi@....com.cn>, <xu.lifeng1@....com.cn>,
        <ouyang.maochun@....com.cn>
Subject: [PATCH] drm/rockchip: Use dev_err_probe() to simplify code

From: Yumeng Fang <fang.yumeng@....com.cn>

In the probe path, dev_err() can be replaced with dev_err_probe()
which will check if error code is -EPROBE_DEFER and prints the
error name. It also sets the defer probe reason which can be
checked later through debugfs.

Signed-off-by: Yumeng Fang <fang.yumeng@....com.cn>
---
 drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 16 ++++------------
 1 file changed, 4 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
index f737e7d46e66..acb59b25d928 100644
--- a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
+++ b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
@@ -213,17 +213,13 @@ static int rockchip_hdmi_parse_dt(struct rockchip_hdmi *hdmi)

 	if (IS_ERR(hdmi->ref_clk)) {
 		ret = PTR_ERR(hdmi->ref_clk);
-		if (ret != -EPROBE_DEFER)
-			dev_err(hdmi->dev, "failed to get reference clock\n");
-		return ret;
+		return dev_err_probe(hdmi->dev, ret, "failed to get reference clock\n");
 	}

 	hdmi->grf_clk = devm_clk_get_optional(hdmi->dev, "grf");
 	if (IS_ERR(hdmi->grf_clk)) {
 		ret = PTR_ERR(hdmi->grf_clk);
-		if (ret != -EPROBE_DEFER)
-			dev_err(hdmi->dev, "failed to get grf clock\n");
-		return ret;
+		return dev_err_probe(hdmi->dev, ret, "failed to get grf clock\n");
 	}

 	ret = devm_regulator_get_enable(hdmi->dev, "avdd-0v9");
@@ -573,17 +569,13 @@ static int dw_hdmi_rockchip_bind(struct device *dev, struct device *master,

 	ret = rockchip_hdmi_parse_dt(hdmi);
 	if (ret) {
-		if (ret != -EPROBE_DEFER)
-			dev_err(hdmi->dev, "Unable to parse OF data\n");
-		return ret;
+		return dev_err_probe(hdmi->dev, ret, "Unable to parse OF data\n");
 	}

 	hdmi->phy = devm_phy_optional_get(dev, "hdmi");
 	if (IS_ERR(hdmi->phy)) {
 		ret = PTR_ERR(hdmi->phy);
-		if (ret != -EPROBE_DEFER)
-			dev_err(hdmi->dev, "failed to get phy\n");
-		return ret;
+		return dev_err_probe(hdmi->dev, ret, "failed to get phy\n");
 	}

 	if (hdmi->phy) {
-- 
2.25.1