/* SPDX-License-Identifier: GPL-2.0-only *//* * Copyright 2012 Steffen Trumtrar <s.trumtrar@pengutronix.de> * * description of display timings */ #ifndef __LINUX_DISPLAY_TIMING_H#define __LINUX_DISPLAY_TIMING_H #include <linux/bitops.h>#include <linux/types.h> enum display_flags {	DISPLAY_FLAGS_HSYNC_LOW		= BIT(0),	DISPLAY_FLAGS_HSYNC_HIGH	= BIT(1),	DISPLAY_FLAGS_VSYNC_LOW		= BIT(2),	DISPLAY_FLAGS_VSYNC_HIGH	= BIT(3), 	/* data enable flag */	DISPLAY_FLAGS_DE_LOW		= BIT(4),	DISPLAY_FLAGS_DE_HIGH		= BIT(5),	/* drive data on pos. edge */	DISPLAY_FLAGS_PIXDATA_POSEDGE	= BIT(6),	/* drive data on neg. edge */	DISPLAY_FLAGS_PIXDATA_NEGEDGE	= BIT(7),	DISPLAY_FLAGS_INTERLACED	= BIT(8),	DISPLAY_FLAGS_DOUBLESCAN	= BIT(9),	DISPLAY_FLAGS_DOUBLECLK		= BIT(10),	/* drive sync on pos. edge */	DISPLAY_FLAGS_SYNC_POSEDGE	= BIT(11),	/* drive sync on neg. edge */	DISPLAY_FLAGS_SYNC_NEGEDGE	= BIT(12),}; /* * A single signal can be specified via a range of minimal and maximal values * with a typical value, that lies somewhere inbetween. */struct timing_entry {	u32 min;	u32 typ;	u32 max;}; /* * Single "mode" entry. This describes one set of signal timings a display can * have in one setting. This struct can later be converted to struct videomode * (see include/video/videomode.h). As each timing_entry can be defined as a * range, one struct display_timing may become multiple struct videomodes. * * Example: hsync active high, vsync active low * *				    Active Video * Video  ______________________XXXXXXXXXXXXXXXXXXXXXX_____________________ *	  |<- sync ->|<- back ->|<----- active ----->|<- front ->|<- sync.. *	  |	     |	 porch  |		     |	 porch	 | * * HSync _|¯¯¯¯¯¯¯¯¯¯|___________________________________________|¯¯¯¯¯¯¯¯¯ * * VSync ¯|__________|¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯|_________ */struct display_timing {	struct timing_entry pixelclock; 	struct timing_entry hactive;		/* hor. active video */	struct timing_entry hfront_porch;	/* hor. front porch */	struct timing_entry hback_porch;	/* hor. back porch */	struct timing_entry hsync_len;		/* hor. sync len */ 	struct timing_entry vactive;		/* ver. active video */	struct timing_entry vfront_porch;	/* ver. front porch */	struct timing_entry vback_porch;	/* ver. back porch */	struct timing_entry vsync_len;		/* ver. sync len */ 	enum display_flags flags;		/* display flags */}; /* * This describes all timing settings a display provides. * The native_mode is the default setting for this display. * Drivers that can handle multiple videomodes should work with this struct and * convert each entry to the desired end result. */struct display_timings {	unsigned int num_timings;	unsigned int native_mode; 	struct display_timing **timings;}; /* get one entry from struct display_timings */static inline struct display_timing *display_timings_get(const struct							 display_timings *disp,							 unsigned int index){	if (disp->num_timings > index)		return disp->timings[index];	else		return NULL;} void display_timings_release(struct display_timings *disp); #endif