linux-kernel - [PATCH] drm/vc4: hdmi: Silence pixel clock error on -EPROBE

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Message-Id: <20200411054611.25647-1-james.hilliard1@gmail.com>
Date:   Fri, 10 Apr 2020 23:46:11 -0600
From:   James Hilliard <james.hilliard1@...il.com>
To:     dri-devel@...ts.freedesktop.org
Cc:     Eric Anholt <eric@...olt.net>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>, linux-kernel@...r.kernel.org,
        James Hilliard <james.hilliard1@...il.com>
Subject: [PATCH] drm/vc4: hdmi: Silence pixel clock error on -EPROBE_DEFER

If the vc4 hdmi driver loads before the pixel clock is available we
see a spurious "*ERROR* Failed to get pixel clock" error.

Signed-off-by: James Hilliard <james.hilliard1@...il.com>
---
 drivers/gpu/drm/vc4/vc4_hdmi.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index 340719238753..6d4ee3f6b445 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -1338,8 +1338,10 @@ static int vc4_hdmi_bind(struct device *dev, struct device *master, void *data)
 
 	hdmi->pixel_clock = devm_clk_get(dev, "pixel");
 	if (IS_ERR(hdmi->pixel_clock)) {
-		DRM_ERROR("Failed to get pixel clock\n");
-		return PTR_ERR(hdmi->pixel_clock);
+		ret = PTR_ERR(hdmi->pixel_clock);
+		if (ret != -EPROBE_DEFER)
+			DRM_ERROR("Failed to get pixel clock\n");
+		return ret;
 	}
 	hdmi->hsm_clock = devm_clk_get(dev, "hdmi");
 	if (IS_ERR(hdmi->hsm_clock)) {
-- 
2.20.1