bdf33c702a
NetBSD provides an in-kernel EDID parser, validator, and printer along with other useful functions. This code will be re-used by the Minix fb driver as it is a complete and well tested implementation. Change-Id: I46fe3005d9957cd90d4972030ddcce7bc3bd7924
86 lines
3.4 KiB
C
86 lines
3.4 KiB
C
/* $NetBSD: vesagtf.h,v 1.1 2006/05/11 01:49:53 gdamore Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 2006 Itronix Inc.
|
|
* All rights reserved.
|
|
*
|
|
* Written by Garrett D'Amore for Itronix Inc.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. The name of Itronix Inc. may not be used to endorse
|
|
* or promote products derived from this software without specific
|
|
* prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND ANY EXPRESS
|
|
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY
|
|
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
|
|
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
|
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef _DEV_VIDEOMODE_VESAGTF_H
|
|
#define _DEV_VIDEOMODE_VESAGTF_H
|
|
|
|
/*
|
|
* Use VESA GTF formula to generate a monitor mode, given resolution and
|
|
* refresh rates.
|
|
*/
|
|
|
|
struct vesagtf_params {
|
|
unsigned margin_ppt; /* vertical margin size, percent * 10
|
|
* think parts-per-thousand */
|
|
unsigned min_porch; /* minimum front porch */
|
|
unsigned vsync_rqd; /* width of vsync in lines */
|
|
unsigned hsync_pct; /* hsync as % of total width */
|
|
unsigned min_vsbp; /* minimum vsync + back porch (usec) */
|
|
unsigned M; /* blanking formula gradient */
|
|
unsigned C; /* blanking formula offset */
|
|
unsigned K; /* blanking formula scaling factor */
|
|
unsigned J; /* blanking formula scaling factor */
|
|
};
|
|
|
|
/*
|
|
* Default values to use for params.
|
|
*/
|
|
#define VESAGTF_MARGIN_PPT 18 /* 1.8% */
|
|
#define VESAGTF_MIN_PORCH 1 /* minimum front porch */
|
|
#define VESAGTF_VSYNC_RQD 3 /* vsync width in lines */
|
|
#define VESAGTF_HSYNC_PCT 8 /* width of hsync % of total line */
|
|
#define VESAGTF_MIN_VSBP 550 /* min vsync + back porch (usec) */
|
|
#define VESAGTF_M 600 /* blanking formula gradient */
|
|
#define VESAGTF_C 40 /* blanking formula offset */
|
|
#define VESAGTF_K 128 /* blanking formula scaling factor */
|
|
#define VESAGTF_J 20 /* blanking formula scaling factor */
|
|
|
|
/*
|
|
* Use VESA GTF formula to generate monitor timings. Assumes default
|
|
* GTF parameters, non-interlaced, and no margins.
|
|
*/
|
|
void vesagtf_mode(unsigned x, unsigned y, unsigned refresh,
|
|
struct videomode *);
|
|
|
|
/*
|
|
* A more complete version, in case we ever want to use alternate GTF
|
|
* parameters. EDID 1.3 allows for "secondary GTF parameters".
|
|
*/
|
|
void vesagtf_mode_params(unsigned x, unsigned y, unsigned refresh,
|
|
struct vesagtf_params *, int flags, struct videomode *);
|
|
|
|
#define VESAGTF_FLAG_ILACE 0x0001 /* use interlace */
|
|
#define VESAGTF_FLAG_MARGINS 0x0002 /* use margins */
|
|
|
|
#endif /* _DEV_VIDEOMODE_VESAGTF_H */
|