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>
diff --git a/include/displayport.h b/include/displayport.h
new file mode 100644
index 0000000..f7c7e25
--- /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
diff --git a/include/dm/uclass-id.h b/include/dm/uclass-id.h
index b17528d..095bcb2 100644
--- a/include/dm/uclass-id.h
+++ b/include/dm/uclass-id.h
@@ -27,6 +27,7 @@
/* U-Boot uclasses start here - in alphabetical order */
UCLASS_CPU, /* CPU, typically part of an SoC */
UCLASS_CROS_EC, /* Chrome OS EC */
+ UCLASS_DISPLAY_PORT, /* Display port video */
UCLASS_ETH, /* Ethernet device */
UCLASS_GPIO, /* Bank of general-purpose I/O pins */
UCLASS_I2C, /* I2C bus */