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dm: video: Add a uclass for display port

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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>
This commit is contained in:
Simon Glass 2015-04-14 21:03:38 -06:00 • committed by Tom Warren
parent 00cf1167bb
commit 51f2c99e14
5 changed files with 106 additions and 0 deletions
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60
include/displayport.h Normal file
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/*
* 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