dm: video: Add a uclass for display port

eDP (Embedded DisplayPort) is a standard widely used in laptops to drive
LCD panels. Add a uclass for this which supports a few simple operations.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Tom Warren <twarren@nvidia.com>

1 files changed, 60 insertions, 0 deletions

diff --git a/include/displayport.h b/include/displayport.h
new file mode 100644
index 0000000000..f7c7e25285
--- /dev/null
+++ b/include/displayport.h
@@ -0,0 +1,60 @@
+/*
+ * Copyright 2014 Google Inc.
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#ifndef _DISPLAYPORT_H
+#define _DISPLAYPORT_H
+
+struct udevice;
+struct display_timing;
+
+/**
+ * display_port_read_edid() - Read information from EDID
+ *
+ * @dev:	Device to read from
+ * @buf:	Buffer to read into (should be EDID_SIZE bytes)
+ * @buf_size:	Buffer size (should be EDID_SIZE)
+ * @return number of bytes read, <=0 for error
+ */
+int display_port_read_edid(struct udevice *dev, u8 *buf, int buf_size);
+
+/**
+ * display_port_enable() - Enable a display port device
+ *
+ * @dev:	Device to enable
+ * @panel_bpp:	Number of bits per pixel for panel
+ * @timing:	Display timings
+ * @return 0 if OK, -ve on error
+ */
+int display_port_enable(struct udevice *dev, int panel_bpp,
+			const struct display_timing *timing);
+
+struct dm_display_port_ops {
+	/**
+	 * read_edid() - Read information from EDID
+	 *
+	 * @dev:	Device to read from
+	 * @buf:	Buffer to read into (should be EDID_SIZE bytes)
+	 * @buf_size:	Buffer size (should be EDID_SIZE)
+	 * @return number of bytes read, <=0 for error
+	 */
+	int (*read_edid)(struct udevice *dev, u8 *buf, int buf_size);
+
+	/**
+	 * enable() - Enable the display port device
+	 *
+	 * @dev:	Device to enable
+	 * @panel_bpp:	Number of bits per pixel for panel
+	 * @timing:	Display timings
+	 * @return 0 if OK, -ve on error
+	 */
+	int (*enable)(struct udevice *dev, int panel_bpp,
+		      const struct display_timing *timing);
+};
+
+#define display_port_get_ops(dev)	\
+	((struct dm_display_port_ops *)(dev)->driver->ops)
+
+#endif