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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (c) 2016 Google, Inc
* Written by Simon Glass <[email protected]>
*/
#ifndef _PANEL_H
#define _PANEL_H
#include <video.h>
#include <fdtdec.h>
/* DRM mode flags mapped to U-Boot DISPLAY_FLAGS for direct compatibility */
#define DRM_MODE_FLAG_NHSYNC DISPLAY_FLAGS_HSYNC_LOW
#define DRM_MODE_FLAG_PHSYNC DISPLAY_FLAGS_HSYNC_HIGH
#define DRM_MODE_FLAG_NVSYNC DISPLAY_FLAGS_VSYNC_LOW
#define DRM_MODE_FLAG_PVSYNC DISPLAY_FLAGS_VSYNC_HIGH
#define DRM_MODE_FLAG_INTERLACE DISPLAY_FLAGS_INTERLACED
#define DRM_MODE_FLAG_DBLSCAN DISPLAY_FLAGS_DOUBLESCAN
#define DRM_MODE_FLAG_DBLCLK DISPLAY_FLAGS_DOUBLECLK
/**
* struct drm_display_mode - DRM kernel-internal display mode structure
* simplified for U-Boot
* @hdisplay: horizontal display size
* @hsync_start: horizontal sync start
* @hsync_end: horizontal sync end
* @htotal: horizontal total size
* @vdisplay: vertical display size
* @vsync_start: vertical sync start
* @vsync_end: vertical sync end
* @vtotal: vertical total size
*
* The horizontal and vertical timings are defined per the following diagram.
*
* ::
*
*
* Active Front Sync Back
* Region Porch Porch
* <-----------------------><----------------><-------------><-------------->
* //////////////////////|
* ////////////////////// |
* ////////////////////// |.................. ................
* _______________
* <----- [hv]display ----->
* <------------- [hv]sync_start ------------>
* <--------------------- [hv]sync_end --------------------->
* <-------------------------------- [hv]total ----------------------------->*
*/
struct drm_display_mode {
unsigned int clock; /* in kHz */
u16 hdisplay;
u16 hsync_start;
u16 hsync_end;
u16 htotal;
u16 vdisplay;
u16 vsync_start;
u16 vsync_end;
u16 vtotal;
u32 flags;
};
struct panel_ops {
/**
* enable_backlight() - Enable the panel backlight
*
* @dev: Panel device containing the backlight to enable
* @return 0 if OK, -ve on error
*/
int (*enable_backlight)(struct udevice *dev);
/**
* set_backlight - Set panel backlight brightness
*
* @dev: Panel device containing the backlight to update
* @percent: Brightness value (0 to 100, or BACKLIGHT_... value)
* @return 0 if OK, -ve on error
*/
int (*set_backlight)(struct udevice *dev, int percent);
/**
* get_timings() - Get display timings from panel.
*
* @dev: Panel device containing the display timings
* @timing: Pointer to the timing for storing
* @return 0 if OK, -ve on error
*/
int (*get_display_timing)(struct udevice *dev,
struct display_timing *timing);
/**
* get_modes() - Get display modes from panel
*
* Returns an array of display modes supported by the panel.
* Similar to Linux's drm_panel_funcs->get_modes().
*
* @dev: Panel device
* @modes: Pointer to an array of modes
* @return number of modes if OK, -ve on error
*/
int (*get_modes)(struct udevice *dev,
const struct drm_display_mode **modes);
};
#define panel_get_ops(dev) ((struct panel_ops *)(dev)->driver->ops)
/**
* panel_enable_backlight() - Enable/disable the panel backlight
*
* @dev: Panel device containing the backlight to enable
* @enable: true to enable the backlight, false to dis
* Return: 0 if OK, -ve on error
*/
int panel_enable_backlight(struct udevice *dev);
/**
* panel_set_backlight - Set brightness for the panel backlight
*
* @dev: Panel device containing the backlight to update
* @percent: Brightness value (0 to 100, or BACKLIGHT_... value)
* Return: 0 if OK, -ve on error
*/
int panel_set_backlight(struct udevice *dev, int percent);
/**
* panel_get_display_timing() - Get display timings from panel.
*
* @dev: Panel device containing the display timings
* @timing: Pointer to the timing for storing
* Return: 0 if OK, -ve on error
*/
int panel_get_display_timing(struct udevice *dev,
struct display_timing *timing);
#endif
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