[PATCH 5/7] tegra_cec: use new cec_notifier_find_hdmi_dev helper

[Hans Verkuil <hverkuil-cisco@xs4all.nl>]

The Tegra CEC driver increased the HDMI device refcount when
it shouldn't. Use the new helper function to ensure that that
doesn't happen and to simplify the driver code.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
---
 drivers/media/platform/tegra-cec/tegra_cec.c | 14 ++++----------
 1 file changed, 4 insertions(+), 10 deletions(-)

diff --git a/drivers/media/platform/tegra-cec/tegra_cec.c b/drivers/media/platform/tegra-cec/tegra_cec.c
index aba488cd0e64..074d647f2908 100644
--- a/drivers/media/platform/tegra-cec/tegra_cec.c
+++ b/drivers/media/platform/tegra-cec/tegra_cec.c
@@ -327,21 +327,15 @@ static const struct cec_adap_ops tegra_cec_ops = {
 
 static int tegra_cec_probe(struct platform_device *pdev)
 {
-	struct platform_device *hdmi_dev;
-	struct device_node *np;
+	struct device *hdmi_dev;
 	struct tegra_cec *cec;
 	struct resource *res;
 	int ret = 0;
 
-	np = of_parse_phandle(pdev->dev.of_node, "hdmi-phandle", 0);
+	hdmi_dev = cec_notifier_find_hdmi_dev(&pdev->dev);
 
-	if (!np) {
-		dev_err(&pdev->dev, "Failed to find hdmi node in device tree\n");
+	if (!hdmi_dev)
 		return -ENODEV;
-	}
-	hdmi_dev = of_find_device_by_node(np);
-	if (hdmi_dev == NULL)
-		return -EPROBE_DEFER;
 
 	cec = devm_kzalloc(&pdev->dev, sizeof(struct tegra_cec), GFP_KERNEL);
 
@@ -400,7 +394,7 @@ static int tegra_cec_probe(struct platform_device *pdev)
 		goto clk_error;
 	}
 
-	cec->notifier = cec_notifier_get(&hdmi_dev->dev);
+	cec->notifier = cec_notifier_get(hdmi_dev);
 	if (!cec->notifier) {
 		ret = -ENOMEM;
 		goto clk_error;
-- 
2.20.1