xref: /minix3/sys/dev/videomode/vesagtf.c (revision 0a6a1f1d05b60e214de2f05a7310ddd1f0e590e7)
1*0a6a1f1dSLionel Sambuc /* $NetBSD: vesagtf.c,v 1.3 2014/03/21 22:00:00 dholland Exp $ */
2bdf33c70SThomas Cort 
3bdf33c70SThomas Cort /*-
4bdf33c70SThomas Cort  * Copyright (c) 2006 Itronix Inc.
5bdf33c70SThomas Cort  * All rights reserved.
6bdf33c70SThomas Cort  *
7bdf33c70SThomas Cort  * Written by Garrett D'Amore for Itronix Inc.
8bdf33c70SThomas Cort  *
9bdf33c70SThomas Cort  * Redistribution and use in source and binary forms, with or without
10bdf33c70SThomas Cort  * modification, are permitted provided that the following conditions
11bdf33c70SThomas Cort  * are met:
12bdf33c70SThomas Cort  * 1. Redistributions of source code must retain the above copyright
13bdf33c70SThomas Cort  *    notice, this list of conditions and the following disclaimer.
14bdf33c70SThomas Cort  * 2. Redistributions in binary form must reproduce the above copyright
15bdf33c70SThomas Cort  *    notice, this list of conditions and the following disclaimer in the
16bdf33c70SThomas Cort  *    documentation and/or other materials provided with the distribution.
17bdf33c70SThomas Cort  * 3. The name of Itronix Inc. may not be used to endorse
18bdf33c70SThomas Cort  *    or promote products derived from this software without specific
19bdf33c70SThomas Cort  *    prior written permission.
20bdf33c70SThomas Cort  *
21bdf33c70SThomas Cort  * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND ANY EXPRESS
22bdf33c70SThomas Cort  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
23bdf33c70SThomas Cort  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24bdf33c70SThomas Cort  * ARE DISCLAIMED.  IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY
25bdf33c70SThomas Cort  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26bdf33c70SThomas Cort  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
27bdf33c70SThomas Cort  * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28bdf33c70SThomas Cort  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
29bdf33c70SThomas Cort  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30bdf33c70SThomas Cort  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
31bdf33c70SThomas Cort  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32bdf33c70SThomas Cort  */
33bdf33c70SThomas Cort 
34bdf33c70SThomas Cort /*
35bdf33c70SThomas Cort  * This was derived from a userland GTF program supplied by NVIDIA.
36bdf33c70SThomas Cort  * NVIDIA's original boilerplate follows.
37bdf33c70SThomas Cort  *
38bdf33c70SThomas Cort  * Note that I have heavily modified the program for use in the EDID
39bdf33c70SThomas Cort  * kernel code for NetBSD, including removing the use of floating
40bdf33c70SThomas Cort  * point operations and making significant adjustments to minimize
41*0a6a1f1dSLionel Sambuc  * error propagation while operating with integer only math.
42bdf33c70SThomas Cort  *
43bdf33c70SThomas Cort  * This has required the use of 64-bit integers in a few places, but
44bdf33c70SThomas Cort  * the upshot is that for a calculation of 1920x1200x85 (as an
45bdf33c70SThomas Cort  * example), the error deviates by only ~.004% relative to the
46bdf33c70SThomas Cort  * floating point version.  This error is *well* within VESA
47bdf33c70SThomas Cort  * tolerances.
48bdf33c70SThomas Cort  */
49bdf33c70SThomas Cort 
50bdf33c70SThomas Cort /*
51bdf33c70SThomas Cort  * Copyright (c) 2001, Andy Ritger  aritger@nvidia.com
52bdf33c70SThomas Cort  * All rights reserved.
53bdf33c70SThomas Cort  *
54bdf33c70SThomas Cort  * Redistribution and use in source and binary forms, with or without
55bdf33c70SThomas Cort  * modification, are permitted provided that the following conditions
56bdf33c70SThomas Cort  * are met:
57bdf33c70SThomas Cort  *
58bdf33c70SThomas Cort  * o Redistributions of source code must retain the above copyright
59bdf33c70SThomas Cort  *   notice, this list of conditions and the following disclaimer.
60bdf33c70SThomas Cort  * o Redistributions in binary form must reproduce the above copyright
61bdf33c70SThomas Cort  *   notice, this list of conditions and the following disclaimer
62bdf33c70SThomas Cort  *   in the documentation and/or other materials provided with the
63bdf33c70SThomas Cort  *   distribution.
64bdf33c70SThomas Cort  * o Neither the name of NVIDIA nor the names of its contributors
65bdf33c70SThomas Cort  *   may be used to endorse or promote products derived from this
66bdf33c70SThomas Cort  *   software without specific prior written permission.
67bdf33c70SThomas Cort  *
68bdf33c70SThomas Cort  *
69bdf33c70SThomas Cort  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
70bdf33c70SThomas Cort  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
71bdf33c70SThomas Cort  * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
72bdf33c70SThomas Cort  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
73bdf33c70SThomas Cort  * THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
74bdf33c70SThomas Cort  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
75bdf33c70SThomas Cort  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
76bdf33c70SThomas Cort  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
77bdf33c70SThomas Cort  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
78bdf33c70SThomas Cort  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
79bdf33c70SThomas Cort  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
80bdf33c70SThomas Cort  * POSSIBILITY OF SUCH DAMAGE.
81bdf33c70SThomas Cort  *
82bdf33c70SThomas Cort  *
83bdf33c70SThomas Cort  *
84bdf33c70SThomas Cort  * This program is based on the Generalized Timing Formula(GTF TM)
85bdf33c70SThomas Cort  * Standard Version: 1.0, Revision: 1.0
86bdf33c70SThomas Cort  *
87bdf33c70SThomas Cort  * The GTF Document contains the following Copyright information:
88bdf33c70SThomas Cort  *
89bdf33c70SThomas Cort  * Copyright (c) 1994, 1995, 1996 - Video Electronics Standards
90bdf33c70SThomas Cort  * Association. Duplication of this document within VESA member
91bdf33c70SThomas Cort  * companies for review purposes is permitted. All other rights
92bdf33c70SThomas Cort  * reserved.
93bdf33c70SThomas Cort  *
94bdf33c70SThomas Cort  * While every precaution has been taken in the preparation
95bdf33c70SThomas Cort  * of this standard, the Video Electronics Standards Association and
96bdf33c70SThomas Cort  * its contributors assume no responsibility for errors or omissions,
97bdf33c70SThomas Cort  * and make no warranties, expressed or implied, of functionality
98bdf33c70SThomas Cort  * of suitability for any purpose. The sample code contained within
99bdf33c70SThomas Cort  * this standard may be used without restriction.
100bdf33c70SThomas Cort  *
101bdf33c70SThomas Cort  *
102bdf33c70SThomas Cort  *
103bdf33c70SThomas Cort  * The GTF EXCEL(TM) SPREADSHEET, a sample (and the definitive)
104bdf33c70SThomas Cort  * implementation of the GTF Timing Standard, is available at:
105bdf33c70SThomas Cort  *
106bdf33c70SThomas Cort  * ftp://ftp.vesa.org/pub/GTF/GTF_V1R1.xls
107bdf33c70SThomas Cort  *
108bdf33c70SThomas Cort  *
109bdf33c70SThomas Cort  *
110bdf33c70SThomas Cort  * This program takes a desired resolution and vertical refresh rate,
111bdf33c70SThomas Cort  * and computes mode timings according to the GTF Timing Standard.
112bdf33c70SThomas Cort  * These mode timings can then be formatted as an XFree86 modeline
113bdf33c70SThomas Cort  * or a mode description for use by fbset(8).
114bdf33c70SThomas Cort  *
115bdf33c70SThomas Cort  *
116bdf33c70SThomas Cort  *
117bdf33c70SThomas Cort  * NOTES:
118bdf33c70SThomas Cort  *
119bdf33c70SThomas Cort  * The GTF allows for computation of "margins" (the visible border
120bdf33c70SThomas Cort  * surrounding the addressable video); on most non-overscan type
121bdf33c70SThomas Cort  * systems, the margin period is zero.  I've implemented the margin
122bdf33c70SThomas Cort  * computations but not enabled it because 1) I don't really have
123bdf33c70SThomas Cort  * any experience with this, and 2) neither XFree86 modelines nor
124bdf33c70SThomas Cort  * fbset fb.modes provide an obvious way for margin timings to be
125bdf33c70SThomas Cort  * included in their mode descriptions (needs more investigation).
126bdf33c70SThomas Cort  *
127bdf33c70SThomas Cort  * The GTF provides for computation of interlaced mode timings;
128bdf33c70SThomas Cort  * I've implemented the computations but not enabled them, yet.
129bdf33c70SThomas Cort  * I should probably enable and test this at some point.
130bdf33c70SThomas Cort  *
131bdf33c70SThomas Cort  *
132bdf33c70SThomas Cort  *
133bdf33c70SThomas Cort  * TODO:
134bdf33c70SThomas Cort  *
135bdf33c70SThomas Cort  * o Add support for interlaced modes.
136bdf33c70SThomas Cort  *
137bdf33c70SThomas Cort  * o Implement the other portions of the GTF: compute mode timings
138bdf33c70SThomas Cort  *   given either the desired pixel clock or the desired horizontal
139bdf33c70SThomas Cort  *   frequency.
140bdf33c70SThomas Cort  *
141bdf33c70SThomas Cort  * o It would be nice if this were more general purpose to do things
142bdf33c70SThomas Cort  *   outside the scope of the GTF: like generate double scan mode
143bdf33c70SThomas Cort  *   timings, for example.
144bdf33c70SThomas Cort  *
145bdf33c70SThomas Cort  * o Printing digits to the right of the decimal point when the
146bdf33c70SThomas Cort  *   digits are 0 annoys me.
147bdf33c70SThomas Cort  *
148bdf33c70SThomas Cort  * o Error checking.
149bdf33c70SThomas Cort  *
150bdf33c70SThomas Cort  */
151bdf33c70SThomas Cort 
152bdf33c70SThomas Cort 
153bdf33c70SThomas Cort #ifdef	_KERNEL
154bdf33c70SThomas Cort #include <sys/cdefs.h>
155bdf33c70SThomas Cort 
156*0a6a1f1dSLionel Sambuc __KERNEL_RCSID(0, "$NetBSD: vesagtf.c,v 1.3 2014/03/21 22:00:00 dholland Exp $");
157bdf33c70SThomas Cort #include <sys/types.h>
158bdf33c70SThomas Cort #include <sys/param.h>
159bdf33c70SThomas Cort #include <sys/systm.h>
160bdf33c70SThomas Cort #include <dev/videomode/videomode.h>
161bdf33c70SThomas Cort #include <dev/videomode/vesagtf.h>
162bdf33c70SThomas Cort #else
163bdf33c70SThomas Cort #include <stdio.h>
164bdf33c70SThomas Cort #include <stdlib.h>
165bdf33c70SThomas Cort #include <sys/types.h>
166bdf33c70SThomas Cort #include "videomode.h"
167bdf33c70SThomas Cort #include "vesagtf.h"
168bdf33c70SThomas Cort 
169bdf33c70SThomas Cort void print_xf86_mode(struct videomode *m);
170bdf33c70SThomas Cort #endif
171bdf33c70SThomas Cort 
172bdf33c70SThomas Cort #define CELL_GRAN         8     /* assumed character cell granularity        */
173bdf33c70SThomas Cort 
174bdf33c70SThomas Cort /* C' and M' are part of the Blanking Duty Cycle computation */
175bdf33c70SThomas Cort /*
176bdf33c70SThomas Cort  * #define C_PRIME           (((C - J) * K/256.0) + J)
177bdf33c70SThomas Cort  * #define M_PRIME           (K/256.0 * M)
178bdf33c70SThomas Cort  */
179bdf33c70SThomas Cort 
180bdf33c70SThomas Cort /*
181bdf33c70SThomas Cort  * C' and M' multiplied by 256 to give integer math.  Make sure to
182bdf33c70SThomas Cort  * scale results using these back down, appropriately.
183bdf33c70SThomas Cort  */
184bdf33c70SThomas Cort #define	C_PRIME256(p)	  (((p->C - p->J) * p->K) + (p->J * 256))
185bdf33c70SThomas Cort #define	M_PRIME256(p)	  (p->K * p->M)
186bdf33c70SThomas Cort 
187bdf33c70SThomas Cort #define	DIVIDE(x,y)	(((x) + ((y) / 2)) / (y))
188bdf33c70SThomas Cort 
189bdf33c70SThomas Cort /*
190bdf33c70SThomas Cort  * print_value() - print the result of the named computation; this is
191bdf33c70SThomas Cort  * useful when comparing against the GTF EXCEL spreadsheet.
192bdf33c70SThomas Cort  */
193bdf33c70SThomas Cort 
194bdf33c70SThomas Cort #ifdef GTFDEBUG
195bdf33c70SThomas Cort 
196bdf33c70SThomas Cort static void
print_value(int n,const char * name,unsigned val)197bdf33c70SThomas Cort print_value(int n, const char *name, unsigned val)
198bdf33c70SThomas Cort {
199bdf33c70SThomas Cort         printf("%2d: %-27s: %u\n", n, name, val);
200bdf33c70SThomas Cort }
201bdf33c70SThomas Cort #else
202bdf33c70SThomas Cort #define	print_value(n, name, val)
203bdf33c70SThomas Cort #endif
204bdf33c70SThomas Cort 
205bdf33c70SThomas Cort 
206bdf33c70SThomas Cort /*
207bdf33c70SThomas Cort  * vert_refresh() - as defined by the GTF Timing Standard, compute the
208bdf33c70SThomas Cort  * Stage 1 Parameters using the vertical refresh frequency.  In other
209bdf33c70SThomas Cort  * words: input a desired resolution and desired refresh rate, and
210bdf33c70SThomas Cort  * output the GTF mode timings.
211bdf33c70SThomas Cort  *
212bdf33c70SThomas Cort  * XXX All the code is in place to compute interlaced modes, but I don't
213bdf33c70SThomas Cort  * feel like testing it right now.
214bdf33c70SThomas Cort  *
215bdf33c70SThomas Cort  * XXX margin computations are implemented but not tested (nor used by
216bdf33c70SThomas Cort  * XFree86 of fbset mode descriptions, from what I can tell).
217bdf33c70SThomas Cort  */
218bdf33c70SThomas Cort 
219bdf33c70SThomas Cort void
vesagtf_mode_params(unsigned h_pixels,unsigned v_lines,unsigned freq,struct vesagtf_params * params,int flags,struct videomode * vmp)220bdf33c70SThomas Cort vesagtf_mode_params(unsigned h_pixels, unsigned v_lines, unsigned freq,
221bdf33c70SThomas Cort     struct vesagtf_params *params, int flags, struct videomode *vmp)
222bdf33c70SThomas Cort {
223bdf33c70SThomas Cort     unsigned v_field_rqd;
224bdf33c70SThomas Cort     unsigned top_margin;
225bdf33c70SThomas Cort     unsigned bottom_margin;
226bdf33c70SThomas Cort     unsigned interlace;
227bdf33c70SThomas Cort     uint64_t h_period_est;
228bdf33c70SThomas Cort     unsigned vsync_plus_bp;
22984d9c625SLionel Sambuc     unsigned v_back_porch __unused;
230bdf33c70SThomas Cort     unsigned total_v_lines;
231bdf33c70SThomas Cort     uint64_t v_field_est;
232bdf33c70SThomas Cort     uint64_t h_period;
233bdf33c70SThomas Cort     unsigned v_field_rate;
23484d9c625SLionel Sambuc     unsigned v_frame_rate __unused;
235bdf33c70SThomas Cort     unsigned left_margin;
236bdf33c70SThomas Cort     unsigned right_margin;
237bdf33c70SThomas Cort     unsigned total_active_pixels;
238bdf33c70SThomas Cort     uint64_t ideal_duty_cycle;
239bdf33c70SThomas Cort     unsigned h_blank;
240bdf33c70SThomas Cort     unsigned total_pixels;
241bdf33c70SThomas Cort     unsigned pixel_freq;
242bdf33c70SThomas Cort 
243bdf33c70SThomas Cort     unsigned h_sync;
244bdf33c70SThomas Cort     unsigned h_front_porch;
245bdf33c70SThomas Cort     unsigned v_odd_front_porch_lines;
246bdf33c70SThomas Cort 
247bdf33c70SThomas Cort #ifdef	GTFDEBUG
248bdf33c70SThomas Cort     unsigned h_freq;
249bdf33c70SThomas Cort #endif
250bdf33c70SThomas Cort 
251bdf33c70SThomas Cort     /*  1. In order to give correct results, the number of horizontal
252bdf33c70SThomas Cort      *  pixels requested is first processed to ensure that it is divisible
253bdf33c70SThomas Cort      *  by the character size, by rounding it to the nearest character
254bdf33c70SThomas Cort      *  cell boundary:
255bdf33c70SThomas Cort      *
256bdf33c70SThomas Cort      *  [H PIXELS RND] = ((ROUND([H PIXELS]/[CELL GRAN RND],0))*[CELLGRAN RND])
257bdf33c70SThomas Cort      */
258bdf33c70SThomas Cort 
259bdf33c70SThomas Cort     h_pixels = DIVIDE(h_pixels, CELL_GRAN) * CELL_GRAN;
260bdf33c70SThomas Cort 
261bdf33c70SThomas Cort     print_value(1, "[H PIXELS RND]", h_pixels);
262bdf33c70SThomas Cort 
263bdf33c70SThomas Cort 
264bdf33c70SThomas Cort     /*  2. If interlace is requested, the number of vertical lines assumed
265bdf33c70SThomas Cort      *  by the calculation must be halved, as the computation calculates
266bdf33c70SThomas Cort      *  the number of vertical lines per field. In either case, the
267bdf33c70SThomas Cort      *  number of lines is rounded to the nearest integer.
268bdf33c70SThomas Cort      *
269bdf33c70SThomas Cort      *  [V LINES RND] = IF([INT RQD?]="y", ROUND([V LINES]/2,0),
270bdf33c70SThomas Cort      *                                     ROUND([V LINES],0))
271bdf33c70SThomas Cort      */
272bdf33c70SThomas Cort 
273bdf33c70SThomas Cort     v_lines = (flags & VESAGTF_FLAG_ILACE) ? DIVIDE(v_lines, 2) : v_lines;
274bdf33c70SThomas Cort 
275bdf33c70SThomas Cort     print_value(2, "[V LINES RND]", v_lines);
276bdf33c70SThomas Cort 
277bdf33c70SThomas Cort 
278bdf33c70SThomas Cort     /*  3. Find the frame rate required:
279bdf33c70SThomas Cort      *
280bdf33c70SThomas Cort      *  [V FIELD RATE RQD] = IF([INT RQD?]="y", [I/P FREQ RQD]*2,
281bdf33c70SThomas Cort      *                                          [I/P FREQ RQD])
282bdf33c70SThomas Cort      */
283bdf33c70SThomas Cort 
284bdf33c70SThomas Cort     v_field_rqd = (flags & VESAGTF_FLAG_ILACE) ? (freq * 2) : (freq);
285bdf33c70SThomas Cort 
286bdf33c70SThomas Cort     print_value(3, "[V FIELD RATE RQD]", v_field_rqd);
287bdf33c70SThomas Cort 
288bdf33c70SThomas Cort 
289bdf33c70SThomas Cort     /*  4. Find number of lines in Top margin:
290bdf33c70SThomas Cort      *  5. Find number of lines in Bottom margin:
291bdf33c70SThomas Cort      *
292bdf33c70SThomas Cort      *  [TOP MARGIN (LINES)] = IF([MARGINS RQD?]="Y",
293bdf33c70SThomas Cort      *          ROUND(([MARGIN%]/100*[V LINES RND]),0),
294bdf33c70SThomas Cort      *          0)
295bdf33c70SThomas Cort      *
296bdf33c70SThomas Cort      *  Ditto for bottom margin.  Note that instead of %, we use PPT, which
297bdf33c70SThomas Cort      *  is parts per thousand.  This helps us with integer math.
298bdf33c70SThomas Cort      */
299bdf33c70SThomas Cort 
300bdf33c70SThomas Cort     top_margin = bottom_margin = (flags & VESAGTF_FLAG_MARGINS) ?
301bdf33c70SThomas Cort 	DIVIDE(v_lines * params->margin_ppt, 1000) : 0;
302bdf33c70SThomas Cort 
303bdf33c70SThomas Cort     print_value(4, "[TOP MARGIN (LINES)]", top_margin);
304bdf33c70SThomas Cort     print_value(5, "[BOT MARGIN (LINES)]", bottom_margin);
305bdf33c70SThomas Cort 
306bdf33c70SThomas Cort 
307bdf33c70SThomas Cort     /*  6. If interlace is required, then set variable [INTERLACE]=0.5:
308bdf33c70SThomas Cort      *
309bdf33c70SThomas Cort      *  [INTERLACE]=(IF([INT RQD?]="y",0.5,0))
310bdf33c70SThomas Cort      *
311bdf33c70SThomas Cort      *  To make this integer friendly, we use some special hacks in step
312bdf33c70SThomas Cort      *  7 below.  Please read those comments to understand why I am using
313bdf33c70SThomas Cort      *  a whole number of 1.0 instead of 0.5 here.
314bdf33c70SThomas Cort      */
315bdf33c70SThomas Cort     interlace = (flags & VESAGTF_FLAG_ILACE) ? 1 : 0;
316bdf33c70SThomas Cort 
317bdf33c70SThomas Cort     print_value(6, "[2*INTERLACE]", interlace);
318bdf33c70SThomas Cort 
319bdf33c70SThomas Cort 
320bdf33c70SThomas Cort     /*  7. Estimate the Horizontal period
321bdf33c70SThomas Cort      *
322bdf33c70SThomas Cort      *  [H PERIOD EST] = ((1/[V FIELD RATE RQD]) - [MIN VSYNC+BP]/1000000) /
323bdf33c70SThomas Cort      *                    ([V LINES RND] + (2*[TOP MARGIN (LINES)]) +
324bdf33c70SThomas Cort      *                     [MIN PORCH RND]+[INTERLACE]) * 1000000
325bdf33c70SThomas Cort      *
326bdf33c70SThomas Cort      *  To make it integer friendly, we pre-multiply the 1000000 to get to
327bdf33c70SThomas Cort      *  usec.  This gives us:
328bdf33c70SThomas Cort      *
329bdf33c70SThomas Cort      *  [H PERIOD EST] = ((1000000/[V FIELD RATE RQD]) - [MIN VSYNC+BP]) /
330bdf33c70SThomas Cort      *			([V LINES RND] + (2 * [TOP MARGIN (LINES)]) +
331bdf33c70SThomas Cort      *			 [MIN PORCH RND]+[INTERLACE])
332bdf33c70SThomas Cort      *
333bdf33c70SThomas Cort      *  The other problem is that the interlace value is wrong.  To get
334bdf33c70SThomas Cort      *  the interlace to a whole number, we multiply both the numerator and
335bdf33c70SThomas Cort      *  divisor by 2, so we can use a value of either 1 or 0 for the interlace
336bdf33c70SThomas Cort      *  factor.
337bdf33c70SThomas Cort      *
338bdf33c70SThomas Cort      * This gives us:
339bdf33c70SThomas Cort      *
340bdf33c70SThomas Cort      * [H PERIOD EST] = ((2*((1000000/[V FIELD RATE RQD]) - [MIN VSYNC+BP])) /
341bdf33c70SThomas Cort      *			 (2*([V LINES RND] + (2*[TOP MARGIN (LINES)]) +
342bdf33c70SThomas Cort      *			  [MIN PORCH RND]) + [2*INTERLACE]))
343bdf33c70SThomas Cort      *
344bdf33c70SThomas Cort      * Finally we multiply by another 1000, to get value in picosec.
345bdf33c70SThomas Cort      * Why picosec?  To minimize rounding errors.  Gotta love integer
346*0a6a1f1dSLionel Sambuc      * math and error propagation.
347bdf33c70SThomas Cort      */
348bdf33c70SThomas Cort 
349bdf33c70SThomas Cort     h_period_est = DIVIDE(((DIVIDE(2000000000000ULL, v_field_rqd)) -
350bdf33c70SThomas Cort 			      (2000000 * params->min_vsbp)),
351bdf33c70SThomas Cort 	((2 * (v_lines + (2 * top_margin) + params->min_porch)) + interlace));
352bdf33c70SThomas Cort 
353bdf33c70SThomas Cort     print_value(7, "[H PERIOD EST (ps)]", h_period_est);
354bdf33c70SThomas Cort 
355bdf33c70SThomas Cort 
356bdf33c70SThomas Cort     /*  8. Find the number of lines in V sync + back porch:
357bdf33c70SThomas Cort      *
358bdf33c70SThomas Cort      *  [V SYNC+BP] = ROUND(([MIN VSYNC+BP]/[H PERIOD EST]),0)
359bdf33c70SThomas Cort      *
360bdf33c70SThomas Cort      *  But recall that h_period_est is in psec. So multiply by 1000000.
361bdf33c70SThomas Cort      */
362bdf33c70SThomas Cort 
363bdf33c70SThomas Cort     vsync_plus_bp = DIVIDE(params->min_vsbp * 1000000, h_period_est);
364bdf33c70SThomas Cort 
365bdf33c70SThomas Cort     print_value(8, "[V SYNC+BP]", vsync_plus_bp);
366bdf33c70SThomas Cort 
367bdf33c70SThomas Cort 
368bdf33c70SThomas Cort     /*  9. Find the number of lines in V back porch alone:
369bdf33c70SThomas Cort      *
370bdf33c70SThomas Cort      *  [V BACK PORCH] = [V SYNC+BP] - [V SYNC RND]
371bdf33c70SThomas Cort      *
372bdf33c70SThomas Cort      *  XXX is "[V SYNC RND]" a typo? should be [V SYNC RQD]?
373bdf33c70SThomas Cort      */
374bdf33c70SThomas Cort 
375bdf33c70SThomas Cort     v_back_porch = vsync_plus_bp - params->vsync_rqd;
376bdf33c70SThomas Cort 
377bdf33c70SThomas Cort     print_value(9, "[V BACK PORCH]", v_back_porch);
378bdf33c70SThomas Cort 
379bdf33c70SThomas Cort 
380bdf33c70SThomas Cort     /*  10. Find the total number of lines in Vertical field period:
381bdf33c70SThomas Cort      *
382bdf33c70SThomas Cort      *  [TOTAL V LINES] = [V LINES RND] + [TOP MARGIN (LINES)] +
383bdf33c70SThomas Cort      *                    [BOT MARGIN (LINES)] + [V SYNC+BP] + [INTERLACE] +
384bdf33c70SThomas Cort      *                    [MIN PORCH RND]
385bdf33c70SThomas Cort      */
386bdf33c70SThomas Cort 
387bdf33c70SThomas Cort     total_v_lines = v_lines + top_margin + bottom_margin + vsync_plus_bp +
388bdf33c70SThomas Cort         interlace + params->min_porch;
389bdf33c70SThomas Cort 
390bdf33c70SThomas Cort     print_value(10, "[TOTAL V LINES]", total_v_lines);
391bdf33c70SThomas Cort 
392bdf33c70SThomas Cort 
393bdf33c70SThomas Cort     /*  11. Estimate the Vertical field frequency:
394bdf33c70SThomas Cort      *
395bdf33c70SThomas Cort      *  [V FIELD RATE EST] = 1 / [H PERIOD EST] / [TOTAL V LINES] * 1000000
396bdf33c70SThomas Cort      *
397bdf33c70SThomas Cort      *  Again, we want to pre multiply by 10^9 to convert for nsec, thereby
398bdf33c70SThomas Cort      *  making it usable in integer math.
399bdf33c70SThomas Cort      *
400bdf33c70SThomas Cort      *  So we get:
401bdf33c70SThomas Cort      *
402bdf33c70SThomas Cort      *  [V FIELD RATE EST] = 1000000000 / [H PERIOD EST] / [TOTAL V LINES]
403bdf33c70SThomas Cort      *
404bdf33c70SThomas Cort      *  This is all scaled to get the result in uHz.  Again, we're trying to
405*0a6a1f1dSLionel Sambuc      *  minimize error propagation.
406bdf33c70SThomas Cort      */
407bdf33c70SThomas Cort     v_field_est = DIVIDE(DIVIDE(1000000000000000ULL, h_period_est),
408bdf33c70SThomas Cort 	total_v_lines);
409bdf33c70SThomas Cort 
410bdf33c70SThomas Cort     print_value(11, "[V FIELD RATE EST(uHz)]", v_field_est);
411bdf33c70SThomas Cort 
412bdf33c70SThomas Cort 
413bdf33c70SThomas Cort     /*  12. Find the actual horizontal period:
414bdf33c70SThomas Cort      *
415bdf33c70SThomas Cort      *  [H PERIOD] = [H PERIOD EST] / ([V FIELD RATE RQD] / [V FIELD RATE EST])
416bdf33c70SThomas Cort      */
417bdf33c70SThomas Cort 
418bdf33c70SThomas Cort     h_period = DIVIDE(h_period_est * v_field_est, v_field_rqd * 1000);
419bdf33c70SThomas Cort 
420bdf33c70SThomas Cort     print_value(12, "[H PERIOD(ps)]", h_period);
421bdf33c70SThomas Cort 
422bdf33c70SThomas Cort 
423bdf33c70SThomas Cort     /*  13. Find the actual Vertical field frequency:
424bdf33c70SThomas Cort      *
425bdf33c70SThomas Cort      *  [V FIELD RATE] = 1 / [H PERIOD] / [TOTAL V LINES] * 1000000
426bdf33c70SThomas Cort      *
427bdf33c70SThomas Cort      *  And again, we convert to nsec ahead of time, giving us:
428bdf33c70SThomas Cort      *
429bdf33c70SThomas Cort      *  [V FIELD RATE] = 1000000 / [H PERIOD] / [TOTAL V LINES]
430bdf33c70SThomas Cort      *
431bdf33c70SThomas Cort      *  And another rescaling back to mHz.  Gotta love it.
432bdf33c70SThomas Cort      */
433bdf33c70SThomas Cort 
434bdf33c70SThomas Cort     v_field_rate = DIVIDE(1000000000000ULL, h_period * total_v_lines);
435bdf33c70SThomas Cort 
436bdf33c70SThomas Cort     print_value(13, "[V FIELD RATE]", v_field_rate);
437bdf33c70SThomas Cort 
438bdf33c70SThomas Cort 
439bdf33c70SThomas Cort     /*  14. Find the Vertical frame frequency:
440bdf33c70SThomas Cort      *
441bdf33c70SThomas Cort      *  [V FRAME RATE] = (IF([INT RQD?]="y", [V FIELD RATE]/2, [V FIELD RATE]))
442bdf33c70SThomas Cort      *
443bdf33c70SThomas Cort      *  N.B. that the result here is in mHz.
444bdf33c70SThomas Cort      */
445bdf33c70SThomas Cort 
446bdf33c70SThomas Cort     v_frame_rate = (flags & VESAGTF_FLAG_ILACE) ?
447bdf33c70SThomas Cort 	v_field_rate / 2 : v_field_rate;
448bdf33c70SThomas Cort 
449bdf33c70SThomas Cort     print_value(14, "[V FRAME RATE]", v_frame_rate);
450bdf33c70SThomas Cort 
451bdf33c70SThomas Cort 
452bdf33c70SThomas Cort     /*  15. Find number of pixels in left margin:
453bdf33c70SThomas Cort      *  16. Find number of pixels in right margin:
454bdf33c70SThomas Cort      *
455bdf33c70SThomas Cort      *  [LEFT MARGIN (PIXELS)] = (IF( [MARGINS RQD?]="Y",
456bdf33c70SThomas Cort      *          (ROUND( ([H PIXELS RND] * [MARGIN%] / 100 /
457bdf33c70SThomas Cort      *                   [CELL GRAN RND]),0)) * [CELL GRAN RND],
458bdf33c70SThomas Cort      *          0))
459bdf33c70SThomas Cort      *
460bdf33c70SThomas Cort      *  Again, we deal with margin percentages as PPT (parts per thousand).
461bdf33c70SThomas Cort      *  And the calculations for left and right are the same.
462bdf33c70SThomas Cort      */
463bdf33c70SThomas Cort 
464bdf33c70SThomas Cort     left_margin = right_margin = (flags & VESAGTF_FLAG_MARGINS) ?
465bdf33c70SThomas Cort 	DIVIDE(DIVIDE(h_pixels * params->margin_ppt, 1000),
466bdf33c70SThomas Cort 	    CELL_GRAN) * CELL_GRAN : 0;
467bdf33c70SThomas Cort 
468bdf33c70SThomas Cort     print_value(15, "[LEFT MARGIN (PIXELS)]", left_margin);
469bdf33c70SThomas Cort     print_value(16, "[RIGHT MARGIN (PIXELS)]", right_margin);
470bdf33c70SThomas Cort 
471bdf33c70SThomas Cort 
472bdf33c70SThomas Cort     /*  17. Find total number of active pixels in image and left and right
473bdf33c70SThomas Cort      *  margins:
474bdf33c70SThomas Cort      *
475bdf33c70SThomas Cort      *  [TOTAL ACTIVE PIXELS] = [H PIXELS RND] + [LEFT MARGIN (PIXELS)] +
476bdf33c70SThomas Cort      *                          [RIGHT MARGIN (PIXELS)]
477bdf33c70SThomas Cort      */
478bdf33c70SThomas Cort 
479bdf33c70SThomas Cort     total_active_pixels = h_pixels + left_margin + right_margin;
480bdf33c70SThomas Cort 
481bdf33c70SThomas Cort     print_value(17, "[TOTAL ACTIVE PIXELS]", total_active_pixels);
482bdf33c70SThomas Cort 
483bdf33c70SThomas Cort 
484bdf33c70SThomas Cort     /*  18. Find the ideal blanking duty cycle from the blanking duty cycle
485bdf33c70SThomas Cort      *  equation:
486bdf33c70SThomas Cort      *
487bdf33c70SThomas Cort      *  [IDEAL DUTY CYCLE] = [C'] - ([M']*[H PERIOD]/1000)
488bdf33c70SThomas Cort      *
489bdf33c70SThomas Cort      *  However, we have modified values for [C'] as [256*C'] and
490bdf33c70SThomas Cort      *  [M'] as [256*M'].  Again the idea here is to get good scaling.
491bdf33c70SThomas Cort      *  We use 256 as the factor to make the math fast.
492bdf33c70SThomas Cort      *
493bdf33c70SThomas Cort      *  Note that this means that we have to scale it appropriately in
494bdf33c70SThomas Cort      *  later calculations.
495bdf33c70SThomas Cort      *
496bdf33c70SThomas Cort      *  The ending result is that our ideal_duty_cycle is 256000x larger
497bdf33c70SThomas Cort      *  than the duty cycle used by VESA.  But again, this reduces error
498*0a6a1f1dSLionel Sambuc      *  propagation.
499bdf33c70SThomas Cort      */
500bdf33c70SThomas Cort 
501bdf33c70SThomas Cort     ideal_duty_cycle =
502bdf33c70SThomas Cort 	((C_PRIME256(params) * 1000) -
503bdf33c70SThomas Cort 	    (M_PRIME256(params) * h_period / 1000000));
504bdf33c70SThomas Cort 
505bdf33c70SThomas Cort     print_value(18, "[IDEAL DUTY CYCLE]", ideal_duty_cycle);
506bdf33c70SThomas Cort 
507bdf33c70SThomas Cort 
508bdf33c70SThomas Cort     /*  19. Find the number of pixels in the blanking time to the nearest
509bdf33c70SThomas Cort      *  double character cell:
510bdf33c70SThomas Cort      *
511bdf33c70SThomas Cort      *  [H BLANK (PIXELS)] = (ROUND(([TOTAL ACTIVE PIXELS] *
512bdf33c70SThomas Cort      *                               [IDEAL DUTY CYCLE] /
513bdf33c70SThomas Cort      *                               (100-[IDEAL DUTY CYCLE]) /
514bdf33c70SThomas Cort      *                               (2*[CELL GRAN RND])), 0))
515bdf33c70SThomas Cort      *                       * (2*[CELL GRAN RND])
516bdf33c70SThomas Cort      *
517bdf33c70SThomas Cort      *  Of course, we adjust to make this rounding work in integer math.
518bdf33c70SThomas Cort      */
519bdf33c70SThomas Cort 
520bdf33c70SThomas Cort     h_blank = DIVIDE(DIVIDE(total_active_pixels * ideal_duty_cycle,
521bdf33c70SThomas Cort 			 (256000 * 100ULL) - ideal_duty_cycle),
522bdf33c70SThomas Cort 	2 * CELL_GRAN) * (2 * CELL_GRAN);
523bdf33c70SThomas Cort 
524bdf33c70SThomas Cort     print_value(19, "[H BLANK (PIXELS)]", h_blank);
525bdf33c70SThomas Cort 
526bdf33c70SThomas Cort 
527bdf33c70SThomas Cort     /*  20. Find total number of pixels:
528bdf33c70SThomas Cort      *
529bdf33c70SThomas Cort      *  [TOTAL PIXELS] = [TOTAL ACTIVE PIXELS] + [H BLANK (PIXELS)]
530bdf33c70SThomas Cort      */
531bdf33c70SThomas Cort 
532bdf33c70SThomas Cort     total_pixels = total_active_pixels + h_blank;
533bdf33c70SThomas Cort 
534bdf33c70SThomas Cort     print_value(20, "[TOTAL PIXELS]", total_pixels);
535bdf33c70SThomas Cort 
536bdf33c70SThomas Cort 
537bdf33c70SThomas Cort     /*  21. Find pixel clock frequency:
538bdf33c70SThomas Cort      *
539bdf33c70SThomas Cort      *  [PIXEL FREQ] = [TOTAL PIXELS] / [H PERIOD]
540bdf33c70SThomas Cort      *
541bdf33c70SThomas Cort      *  We calculate this in Hz rather than MHz, to get a value that
542bdf33c70SThomas Cort      *  is usable with integer math.  Recall that the [H PERIOD] is in
543bdf33c70SThomas Cort      *  nsec.
544bdf33c70SThomas Cort      */
545bdf33c70SThomas Cort 
546bdf33c70SThomas Cort     pixel_freq = DIVIDE(total_pixels * 1000000, DIVIDE(h_period, 1000));
547bdf33c70SThomas Cort 
548bdf33c70SThomas Cort     print_value(21, "[PIXEL FREQ]", pixel_freq);
549bdf33c70SThomas Cort 
550bdf33c70SThomas Cort 
551bdf33c70SThomas Cort     /*  22. Find horizontal frequency:
552bdf33c70SThomas Cort      *
553bdf33c70SThomas Cort      *  [H FREQ] = 1000 / [H PERIOD]
554bdf33c70SThomas Cort      *
555bdf33c70SThomas Cort      *  I've ifdef'd this out, because we don't need it for any of
556bdf33c70SThomas Cort      *  our calculations.
557bdf33c70SThomas Cort      *  We calculate this in Hz rather than kHz, to avoid rounding
558bdf33c70SThomas Cort      *  errors.  Recall that the [H PERIOD] is in usec.
559bdf33c70SThomas Cort      */
560bdf33c70SThomas Cort 
561bdf33c70SThomas Cort #ifdef	GTFDEBUG
562bdf33c70SThomas Cort     h_freq = 1000000000 / h_period;
563bdf33c70SThomas Cort 
564bdf33c70SThomas Cort     print_value(22, "[H FREQ]", h_freq);
565bdf33c70SThomas Cort #endif
566bdf33c70SThomas Cort 
567bdf33c70SThomas Cort 
568bdf33c70SThomas Cort 
569bdf33c70SThomas Cort     /* Stage 1 computations are now complete; I should really pass
570bdf33c70SThomas Cort        the results to another function and do the Stage 2
571bdf33c70SThomas Cort        computations, but I only need a few more values so I'll just
572bdf33c70SThomas Cort        append the computations here for now */
573bdf33c70SThomas Cort 
574bdf33c70SThomas Cort 
575bdf33c70SThomas Cort 
576bdf33c70SThomas Cort     /*  17. Find the number of pixels in the horizontal sync period:
577bdf33c70SThomas Cort      *
578bdf33c70SThomas Cort      *  [H SYNC (PIXELS)] =(ROUND(([H SYNC%] / 100 * [TOTAL PIXELS] /
579bdf33c70SThomas Cort      *                             [CELL GRAN RND]),0))*[CELL GRAN RND]
580bdf33c70SThomas Cort      *
581bdf33c70SThomas Cort      *  Rewriting for integer math:
582bdf33c70SThomas Cort      *
583bdf33c70SThomas Cort      *  [H SYNC (PIXELS)]=(ROUND((H SYNC%] * [TOTAL PIXELS] / 100 /
584bdf33c70SThomas Cort      *				   [CELL GRAN RND),0))*[CELL GRAN RND]
585bdf33c70SThomas Cort      */
586bdf33c70SThomas Cort 
587bdf33c70SThomas Cort     h_sync = DIVIDE(((params->hsync_pct * total_pixels) / 100), CELL_GRAN) *
588bdf33c70SThomas Cort 	CELL_GRAN;
589bdf33c70SThomas Cort 
590bdf33c70SThomas Cort     print_value(17, "[H SYNC (PIXELS)]", h_sync);
591bdf33c70SThomas Cort 
592bdf33c70SThomas Cort 
593bdf33c70SThomas Cort     /*  18. Find the number of pixels in the horizontal front porch period:
594bdf33c70SThomas Cort      *
595bdf33c70SThomas Cort      *  [H FRONT PORCH (PIXELS)] = ([H BLANK (PIXELS)]/2)-[H SYNC (PIXELS)]
596bdf33c70SThomas Cort      *
597bdf33c70SThomas Cort      *  Note that h_blank is always an even number of characters (i.e.
598bdf33c70SThomas Cort      *  h_blank % (CELL_GRAN * 2) == 0)
599bdf33c70SThomas Cort      */
600bdf33c70SThomas Cort 
601bdf33c70SThomas Cort     h_front_porch = (h_blank / 2) - h_sync;
602bdf33c70SThomas Cort 
603bdf33c70SThomas Cort     print_value(18, "[H FRONT PORCH (PIXELS)]", h_front_porch);
604bdf33c70SThomas Cort 
605bdf33c70SThomas Cort 
606bdf33c70SThomas Cort     /*  36. Find the number of lines in the odd front porch period:
607bdf33c70SThomas Cort      *
608bdf33c70SThomas Cort      *  [V ODD FRONT PORCH(LINES)]=([MIN PORCH RND]+[INTERLACE])
609bdf33c70SThomas Cort      *
610bdf33c70SThomas Cort      *  Adjusting for the fact that the interlace is scaled:
611bdf33c70SThomas Cort      *
612bdf33c70SThomas Cort      *  [V ODD FRONT PORCH(LINES)]=(([MIN PORCH RND] * 2) + [2*INTERLACE]) / 2
613bdf33c70SThomas Cort      */
614bdf33c70SThomas Cort 
615bdf33c70SThomas Cort     v_odd_front_porch_lines = ((2 * params->min_porch) + interlace) / 2;
616bdf33c70SThomas Cort 
617bdf33c70SThomas Cort     print_value(36, "[V ODD FRONT PORCH(LINES)]", v_odd_front_porch_lines);
618bdf33c70SThomas Cort 
619bdf33c70SThomas Cort 
620bdf33c70SThomas Cort     /* finally, pack the results in the mode struct */
621bdf33c70SThomas Cort 
622bdf33c70SThomas Cort     vmp->hsync_start = h_pixels + h_front_porch;
623bdf33c70SThomas Cort     vmp->hsync_end = vmp->hsync_start + h_sync;
624bdf33c70SThomas Cort     vmp->htotal = total_pixels;
625bdf33c70SThomas Cort     vmp->hdisplay = h_pixels;
626bdf33c70SThomas Cort 
627bdf33c70SThomas Cort     vmp->vsync_start = v_lines + v_odd_front_porch_lines;
628bdf33c70SThomas Cort     vmp->vsync_end = vmp->vsync_start + params->vsync_rqd;
629bdf33c70SThomas Cort     vmp->vtotal = total_v_lines;
630bdf33c70SThomas Cort     vmp->vdisplay = v_lines;
631bdf33c70SThomas Cort 
632bdf33c70SThomas Cort     vmp->dot_clock = pixel_freq;
633bdf33c70SThomas Cort 
634bdf33c70SThomas Cort }
635bdf33c70SThomas Cort 
636bdf33c70SThomas Cort void
vesagtf_mode(unsigned x,unsigned y,unsigned refresh,struct videomode * vmp)637bdf33c70SThomas Cort vesagtf_mode(unsigned x, unsigned y, unsigned refresh, struct videomode *vmp)
638bdf33c70SThomas Cort {
639bdf33c70SThomas Cort 	struct vesagtf_params	params;
640bdf33c70SThomas Cort 
641bdf33c70SThomas Cort 	params.margin_ppt = VESAGTF_MARGIN_PPT;
642bdf33c70SThomas Cort 	params.min_porch = VESAGTF_MIN_PORCH;
643bdf33c70SThomas Cort 	params.vsync_rqd = VESAGTF_VSYNC_RQD;
644bdf33c70SThomas Cort 	params.hsync_pct = VESAGTF_HSYNC_PCT;
645bdf33c70SThomas Cort 	params.min_vsbp = VESAGTF_MIN_VSBP;
646bdf33c70SThomas Cort 	params.M = VESAGTF_M;
647bdf33c70SThomas Cort 	params.C = VESAGTF_C;
648bdf33c70SThomas Cort 	params.K = VESAGTF_K;
649bdf33c70SThomas Cort 	params.J = VESAGTF_J;
650bdf33c70SThomas Cort 
651bdf33c70SThomas Cort 	vesagtf_mode_params(x, y, refresh, &params, 0, vmp);
652bdf33c70SThomas Cort }
653bdf33c70SThomas Cort 
654bdf33c70SThomas Cort /*
655bdf33c70SThomas Cort  * The tidbit here is so that you can compile this file as a
656bdf33c70SThomas Cort  * standalone user program to generate X11 modelines using VESA GTF.
657bdf33c70SThomas Cort  * This also allows for testing of the code itself, without
658bdf33c70SThomas Cort  * necessitating a full kernel recompile.
659bdf33c70SThomas Cort  */
660bdf33c70SThomas Cort 
661bdf33c70SThomas Cort /* print_xf86_mode() - print the XFree86 modeline, given mode timings. */
662bdf33c70SThomas Cort 
66384d9c625SLionel Sambuc #if !defined(__minix)
664bdf33c70SThomas Cort #ifndef _KERNEL
665bdf33c70SThomas Cort void
print_xf86_mode(struct videomode * vmp)666bdf33c70SThomas Cort print_xf86_mode (struct videomode *vmp)
667bdf33c70SThomas Cort {
668bdf33c70SThomas Cort 	float	vf, hf;
669bdf33c70SThomas Cort 
670bdf33c70SThomas Cort 	hf = 1000.0 * vmp->dot_clock / vmp->htotal;
671bdf33c70SThomas Cort 	vf = 1.0 * hf / vmp->vtotal;
672bdf33c70SThomas Cort 
673bdf33c70SThomas Cort     printf("\n");
674bdf33c70SThomas Cort     printf("  # %dx%d @ %.2f Hz (GTF) hsync: %.2f kHz; pclk: %.2f MHz\n",
675bdf33c70SThomas Cort 	vmp->hdisplay, vmp->vdisplay, vf, hf, vmp->dot_clock / 1000.0);
676bdf33c70SThomas Cort 
677bdf33c70SThomas Cort     printf("  Modeline \"%dx%d_%.2f\"  %.2f"
678bdf33c70SThomas Cort 	"  %d %d %d %d"
679bdf33c70SThomas Cort 	"  %d %d %d %d"
680bdf33c70SThomas Cort 	"  -HSync +Vsync\n\n",
681bdf33c70SThomas Cort 	vmp->hdisplay, vmp->vdisplay, vf, (vmp->dot_clock / 1000.0),
682bdf33c70SThomas Cort 	vmp->hdisplay, vmp->hsync_start, vmp->hsync_end, vmp->htotal,
683bdf33c70SThomas Cort 	vmp->vdisplay, vmp->vsync_start, vmp->vsync_end, vmp->vtotal);
684bdf33c70SThomas Cort }
685bdf33c70SThomas Cort 
686bdf33c70SThomas Cort int
main(int argc,char * argv[])687bdf33c70SThomas Cort main (int argc, char *argv[])
688bdf33c70SThomas Cort {
689bdf33c70SThomas Cort 	struct videomode m;
690bdf33c70SThomas Cort 
691bdf33c70SThomas Cort 	if (argc != 4) {
692bdf33c70SThomas Cort 		printf("usage: %s x y refresh\n", argv[0]);
693bdf33c70SThomas Cort 		exit(1);
694bdf33c70SThomas Cort 	}
695bdf33c70SThomas Cort 
696bdf33c70SThomas Cort 	vesagtf_mode(atoi(argv[1]), atoi(argv[2]), atoi(argv[3]), &m);
697bdf33c70SThomas Cort 
698bdf33c70SThomas Cort         print_xf86_mode(&m);
699bdf33c70SThomas Cort 
700bdf33c70SThomas Cort 	return 0;
701bdf33c70SThomas Cort 
702bdf33c70SThomas Cort }
703bdf33c70SThomas Cort #endif
70484d9c625SLionel Sambuc #endif /* !defined(__minix) */
705