dm: video: Add support for video bridges

[karo-tx-uboot.git] / include / video_bridge.h

diff --git a/include/video_bridge.h b/include/video_bridge.h
new file mode 100644 (file)
index 0000000..c7b8681
--- /dev/null
+++ b/include/video_bridge.h
@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2015 Google, Inc
+ * Written by Simon Glass <sjg@chromium.org>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#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);
+};
+
+#define video_bridge_get_ops(dev) \
+               ((struct video_bridge_ops *)(dev)->driver->ops)
+
+/**
+ * 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);
+
+#endif