linux-kernel - [PATCH] drm/rockchip: dw_hdmi: filter regulator -EPROBE

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Message-Id: <20220926203752.5430-1-aurelien@aurel32.net>
Date:   Mon, 26 Sep 2022 22:37:52 +0200
From:   Aurelien Jarno <aurelien@...el32.net>
To:     linux-kernel@...r.kernel.org
Cc:     Aurelien Jarno <aurelien@...el32.net>,
        Sandy Huang <hjc@...k-chips.com>,
        Heiko Stübner <heiko@...ech.de>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Dmitry Osipenko <dmitry.osipenko@...labora.com>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        dri-devel@...ts.freedesktop.org (open list:DRM DRIVERS FOR ROCKCHIP),
        linux-arm-kernel@...ts.infradead.org (moderated list:ARM/Rockchip SoC
        support),
        linux-rockchip@...ts.infradead.org (open list:ARM/Rockchip SoC support)
Subject: [PATCH] drm/rockchip: dw_hdmi: filter regulator -EPROBE_DEFER error messages

When the avdd-0v9 or avdd-1v8 supply are not yet available, EPROBE_DEFER
is returned by rockchip_hdmi_parse_dt(). This causes the following error
message to be printed multiple times:

    dwhdmi-rockchip fe0a0000.hdmi: [drm:dw_hdmi_rockchip_bind [rockchipdrm]] *ERROR* Unable to parse OF data

Fix that by not printing the message when rockchip_hdmi_parse_dt()
returns -EPROBE_DEFER.

Fixes: ca80c4eb4b01 ("drm/rockchip: dw_hdmi: add regulator support")
Signed-off-by: Aurelien Jarno <aurelien@...el32.net>
---
 drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
index c14f88893868..2f4b8f64cbad 100644
--- a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
+++ b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
@@ -565,7 +565,8 @@ static int dw_hdmi_rockchip_bind(struct device *dev, struct device *master,
 
 	ret = rockchip_hdmi_parse_dt(hdmi);
 	if (ret) {
-		DRM_DEV_ERROR(hdmi->dev, "Unable to parse OF data\n");
+		if (ret != -EPROBE_DEFER)
+			DRM_DEV_ERROR(hdmi->dev, "Unable to parse OF data\n");
 		return ret;
 	}
 
-- 
2.35.1