#include <linux/slab.h>
#include <linux/list.h>
#include <linux/kref.h>
+#include <linux/of_platform.h>
#include <media/cec.h>
#include <media/cec-notifier.h>
cec_notifier_put(n);
}
EXPORT_SYMBOL_GPL(cec_notifier_unregister);
+
+struct device *cec_notifier_parse_hdmi_phandle(struct device *dev)
+{
+ struct platform_device *hdmi_pdev;
+ struct device *hdmi_dev = NULL;
+ struct device_node *np;
+
+ np = of_parse_phandle(dev->of_node, "hdmi-phandle", 0);
+
+ if (!np) {
+ dev_err(dev, "Failed to find HDMI node in device tree\n");
+ return ERR_PTR(-ENODEV);
+ }
+ hdmi_pdev = of_find_device_by_node(np);
+ of_node_put(np);
+ if (hdmi_pdev) {
+ hdmi_dev = &hdmi_pdev->dev;
+ /*
+ * Note that the device struct is only used as a key into the
+ * cec_notifiers list, it is never actually accessed.
+ * So we decrement the reference here so we don't leak
+ * memory.
+ */
+ put_device(hdmi_dev);
+ return hdmi_dev;
+ }
+ return ERR_PTR(-EPROBE_DEFER);
+}
+EXPORT_SYMBOL_GPL(cec_notifier_parse_hdmi_phandle);
#ifndef LINUX_CEC_NOTIFIER_H
#define LINUX_CEC_NOTIFIER_H
-#include <linux/types.h>
+#include <linux/err.h>
#include <media/cec.h>
struct device;
void cec_register_cec_notifier(struct cec_adapter *adap,
struct cec_notifier *notifier);
+/**
+ * cec_notifier_parse_hdmi_phandle - find the hdmi device from "hdmi-phandle"
+ * @dev: the device with the "hdmi-phandle" device tree property
+ *
+ * Returns the device pointer referenced by the "hdmi-phandle" property.
+ * Note that the refcount of the returned device is not incremented.
+ * This device pointer is only used as a key value in the notifier
+ * list, but it is never accessed by the CEC driver.
+ */
+struct device *cec_notifier_parse_hdmi_phandle(struct device *dev);
+
#else
static inline struct cec_notifier *cec_notifier_get_conn(struct device *dev,
const char *conn)
struct cec_notifier *notifier)
{
}
+
+static inline struct device *cec_notifier_parse_hdmi_phandle(struct device *dev)
+{
+ return ERR_PTR(-ENODEV);
+}
+
#endif
/**