1 files changed, 165 insertions, 0 deletions
diff --git a/include/video_bridge.h b/include/video_bridge.h
new file mode 100644
index 00000000000..00e9804565c
--- /dev/null
+++ b/include/video_bridge.h
@@ -0,0 +1,165 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2015 Google, Inc
+ * Written by Simon Glass <sjg@chromium.org>
+ */
+
+#ifndef __VIDEO_BRIDGE
+#define __VIDEO_BRIDGE
+
+#include <asm/gpio.h>
+
+/**
+ * struct video_bridge_priv - uclass information for video bridges
+ *
+ * @sleep:	GPIO to assert to power down the bridge
+ * @reset:	GPIO to assert to reset the bridge
+ * @hotplug:	Optional GPIO to check if bridge is connected
+ */
+struct video_bridge_priv {
+	struct gpio_desc sleep;
+	struct gpio_desc reset;
+	struct gpio_desc hotplug;
+};
+
+/**
+ * Operations for video bridges
+ */
+struct video_bridge_ops {
+	/**
+	 * attach() - attach a video bridge
+	 *
+	 * @return 0 if OK, -ve on error
+	 */
+	int (*attach)(struct udevice *dev);
+
+	/**
+	 * check_attached() - check if a bridge is correctly attached
+	 *
+	 * This method is optional - if not provided then the hotplug GPIO
+	 * will be checked instead.
+	 *
+	 * @dev:	Device to check
+	 * @return 0 if attached, -EENOTCONN if not, or other -ve error
+	 */
+	int (*check_attached)(struct udevice *dev);
+
+	/**
+	 * set_backlight() - Set the backlight brightness
+	 *
+	 * @dev:	device to adjust
+	 * @percent:	brightness percentage (0=off, 100=full brightness)
+	 * @return 0 if OK, -ve on error
+	 */
+	int (*set_backlight)(struct udevice *dev, int percent);
+
+	/**
+	 * get_display_timing() - Get display timings from bridge.
+	 *
+	 * @dev:	Bridge device containing the linked display timings
+	 * @tim:	Place to put timings
+	 * @return 0 if OK, -ve on error
+	 *
+	 * This call it totally optional and useful mainly for integrated
+	 * bridges with fixed output device.
+	 */
+	int (*get_display_timing)(struct udevice *dev,
+				  struct display_timing *timing);
+
+	/**
+	 * read_edid() - Read information from EDID
+	 *
+	 * @dev:	Device to read from
+	 * @buf:	Buffer to read into
+	 * @buf_size:	Buffer size
+	 * @return number of bytes read, <=0 for error
+	 */
+	int (*read_edid)(struct udevice *dev, u8 *buf, int buf_size);
+};
+
+#define video_bridge_get_ops(dev) \
+		((struct video_bridge_ops *)(dev)->driver->ops)
+
+#if CONFIG_IS_ENABLED(VIDEO_BRIDGE)
+/**
+ * video_bridge_attach() - attach a video bridge
+ *
+ * Return: 0 if OK, -ve on error
+ */
+int video_bridge_attach(struct udevice *dev);
+
+/**
+ * video_bridge_set_backlight() - Set the backlight brightness
+ *
+ * @percent:	brightness percentage (0=off, 100=full brightness)
+ * Return: 0 if OK, -ve on error
+ */
+int video_bridge_set_backlight(struct udevice *dev, int percent);
+
+/**
+ * video_bridge_set_active() - take the bridge in/out of reset/powerdown
+ *
+ * @dev:	Device to adjust
+ * @active:	true to power up and reset, false to power down
+ */
+int video_bridge_set_active(struct udevice *dev, bool active);
+
+/**
+ * check_attached() - check if a bridge is correctly attached
+ *
+ * @dev:	Device to check
+ * Return: 0 if attached, -EENOTCONN if not, or other -ve error
+ */
+int video_bridge_check_attached(struct udevice *dev);
+
+/**
+ * video_bridge_get_display_timing() - Get display timings from bridge.
+ *
+ * @dev:	Bridge device containing the linked display timings
+ * Return: 0 if OK, -ve on error
+ */
+int video_bridge_get_display_timing(struct udevice *dev,
+				    struct display_timing *timing);
+/**
+ * video_bridge_read_edid() - Read information from EDID
+ *
+ * @dev:	Device to read from
+ * @buf:	Buffer to read into
+ * @buf_size:	Buffer size
+ * Return: number of bytes read, <=0 for error
+ */
+int video_bridge_read_edid(struct udevice *dev, u8 *buf, int buf_size);
+#else
+static inline int video_bridge_attach(struct udevice *dev)
+{
+	return -ENOSYS;
+}
+
+static inline int video_bridge_set_backlight(struct udevice *dev, int percent)
+{
+	return -ENOSYS;
+}
+
+static inline int video_bridge_set_active(struct udevice *dev, bool active)
+{
+	return -ENOSYS;
+}
+
+static inline int video_bridge_check_attached(struct udevice *dev)
+{
+	return -ENOSYS;
+}
+
+static inline int video_bridge_get_display_timing(struct udevice *dev,
+						  struct display_timing *timing)
+{
+	return -ENOSYS;
+}
+
+static inline int video_bridge_read_edid(struct udevice *dev, u8 *buf, int buf_size)
+{
+	return -ENOSYS;
+}
+#endif /* CONFIG_VIDEO_BRIDGE */
+
+#endif