1278798Shselasky/* $NetBSD$ */ 2278798Shselasky/* $FreeBSD: releng/11.0/sys/dev/videomode/vesagtf.h 278798 2015-02-15 11:37:40Z hselasky $ */ 3278798Shselasky 4278798Shselasky/*- 5278798Shselasky * Copyright (c) 2006 Itronix Inc. 6278798Shselasky * All rights reserved. 7278798Shselasky * 8278798Shselasky * Written by Garrett D'Amore for Itronix Inc. 9278798Shselasky * 10278798Shselasky * Redistribution and use in source and binary forms, with or without 11278798Shselasky * modification, are permitted provided that the following conditions 12278798Shselasky * are met: 13278798Shselasky * 1. Redistributions of source code must retain the above copyright 14278798Shselasky * notice, this list of conditions and the following disclaimer. 15278798Shselasky * 2. Redistributions in binary form must reproduce the above copyright 16278798Shselasky * notice, this list of conditions and the following disclaimer in the 17278798Shselasky * documentation and/or other materials provided with the distribution. 18278798Shselasky * 3. The name of Itronix Inc. may not be used to endorse 19278798Shselasky * or promote products derived from this software without specific 20278798Shselasky * prior written permission. 21278798Shselasky * 22278798Shselasky * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND ANY EXPRESS 23278798Shselasky * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 24278798Shselasky * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25278798Shselasky * ARE DISCLAIMED. IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY 26278798Shselasky * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27278798Shselasky * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 28278798Shselasky * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29278798Shselasky * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 30278798Shselasky * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 31278798Shselasky * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 32278798Shselasky * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33278798Shselasky */ 34278798Shselasky 35278798Shselasky#ifndef _DEV_VIDEOMODE_VESAGTF_H 36278798Shselasky#define _DEV_VIDEOMODE_VESAGTF_H 37278798Shselasky 38278798Shselasky/* 39278798Shselasky * Use VESA GTF formula to generate a monitor mode, given resolution and 40278798Shselasky * refresh rates. 41278798Shselasky */ 42278798Shselasky 43278798Shselaskystruct vesagtf_params { 44278798Shselasky unsigned margin_ppt; /* vertical margin size, percent * 10 45278798Shselasky * think parts-per-thousand */ 46278798Shselasky unsigned min_porch; /* minimum front porch */ 47278798Shselasky unsigned vsync_rqd; /* width of vsync in lines */ 48278798Shselasky unsigned hsync_pct; /* hsync as % of total width */ 49278798Shselasky unsigned min_vsbp; /* minimum vsync + back porch (usec) */ 50278798Shselasky unsigned M; /* blanking formula gradient */ 51278798Shselasky unsigned C; /* blanking formula offset */ 52278798Shselasky unsigned K; /* blanking formula scaling factor */ 53278798Shselasky unsigned J; /* blanking formula scaling factor */ 54278798Shselasky}; 55278798Shselasky 56278798Shselasky/* 57278798Shselasky * Default values to use for params. 58278798Shselasky */ 59278798Shselasky#define VESAGTF_MARGIN_PPT 18 /* 1.8% */ 60278798Shselasky#define VESAGTF_MIN_PORCH 1 /* minimum front porch */ 61278798Shselasky#define VESAGTF_VSYNC_RQD 3 /* vsync width in lines */ 62278798Shselasky#define VESAGTF_HSYNC_PCT 8 /* width of hsync % of total line */ 63278798Shselasky#define VESAGTF_MIN_VSBP 550 /* min vsync + back porch (usec) */ 64278798Shselasky#define VESAGTF_M 600 /* blanking formula gradient */ 65278798Shselasky#define VESAGTF_C 40 /* blanking formula offset */ 66278798Shselasky#define VESAGTF_K 128 /* blanking formula scaling factor */ 67278798Shselasky#define VESAGTF_J 20 /* blanking formula scaling factor */ 68278798Shselasky 69278798Shselasky/* 70278798Shselasky * Use VESA GTF formula to generate monitor timings. Assumes default 71278798Shselasky * GTF parameters, non-interlaced, and no margins. 72278798Shselasky */ 73278798Shselaskyvoid vesagtf_mode(unsigned x, unsigned y, unsigned refresh, 74278798Shselasky struct videomode *); 75278798Shselasky 76278798Shselasky/* 77278798Shselasky * A more complete version, in case we ever want to use alternate GTF 78278798Shselasky * parameters. EDID 1.3 allows for "secondary GTF parameters". 79278798Shselasky */ 80278798Shselaskyvoid vesagtf_mode_params(unsigned x, unsigned y, unsigned refresh, 81278798Shselasky struct vesagtf_params *, int flags, struct videomode *); 82278798Shselasky 83278798Shselasky#define VESAGTF_FLAG_ILACE 0x0001 /* use interlace */ 84278798Shselasky#define VESAGTF_FLAG_MARGINS 0x0002 /* use margins */ 85278798Shselasky 86278798Shselasky#endif /* _DEV_VIDEOMODE_VESAGTF_H */ 87