950-0643-drm-vc4-hdmi-Silence-pixel-clock-error-on-EPROBE_DEF.patch

From ba875ce27cd407bc61502517671623df07bb6c1a Mon Sep 17 00:00:00 2001
From: James Hilliard <james.hilliard1@gmail.com>
Date: Fri, 10 Apr 2020 19:24:40 -0600
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@gmail.com>
---
 drivers/gpu/drm/vc4/vc4_hdmi.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -1493,8 +1493,10 @@ static int vc4_hdmi_init_resources(struc
 
 	vc4_hdmi->pixel_clock = devm_clk_get(dev, "pixel");
 	if (IS_ERR(vc4_hdmi->pixel_clock)) {
-		DRM_ERROR("Failed to get pixel clock\n");
-		return PTR_ERR(vc4_hdmi->pixel_clock);
+		ret = PTR_ERR(vc4_hdmi->pixel_clock);
+		if (ret != -EPROBE_DEFER)
+			DRM_ERROR("Failed to get pixel clock\n");
+		return ret;
 	}
 
 	vc4_hdmi->hsm_clock = devm_clk_get(dev, "hdmi");