blob: b0733153dfd294f178ff1818618fadbe63a1d144 [file] [log] [blame]
Dave Airlief453ba02008-11-07 14:05:41 -08001/*
Dave Airlief453ba02008-11-07 14:05:41 -08002 * Copyright © 1997-2003 by The XFree86 Project, Inc.
3 * Copyright © 2007 Dave Airlie
4 * Copyright © 2007-2008 Intel Corporation
5 * Jesse Barnes <jesse.barnes@intel.com>
Zhao Yakuid782c3f2009-06-22 13:17:08 +08006 * Copyright 2005-2006 Luc Verhaegen
Zhao Yakui26bbdad2009-06-22 13:17:09 +08007 * Copyright (c) 2001, Andy Ritger aritger@nvidia.com
Dave Airlief453ba02008-11-07 14:05:41 -08008 *
9 * Permission is hereby granted, free of charge, to any person obtaining a
10 * copy of this software and associated documentation files (the "Software"),
11 * to deal in the Software without restriction, including without limitation
12 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
13 * and/or sell copies of the Software, and to permit persons to whom the
14 * Software is furnished to do so, subject to the following conditions:
15 *
16 * The above copyright notice and this permission notice shall be included in
17 * all copies or substantial portions of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
23 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
24 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
25 * OTHER DEALINGS IN THE SOFTWARE.
26 *
27 * Except as contained in this notice, the name of the copyright holder(s)
28 * and author(s) shall not be used in advertising or otherwise to promote
29 * the sale, use or other dealings in this Software without prior written
30 * authorization from the copyright holder(s) and author(s).
31 */
32
33#include <linux/list.h>
Dave Chinner2c761272010-01-12 17:39:16 +110034#include <linux/list_sort.h>
Paul Gortmaker2d1a8a42011-08-30 18:16:33 -040035#include <linux/export.h>
David Howells760285e2012-10-02 18:01:07 +010036#include <drm/drmP.h>
37#include <drm/drm_crtc.h>
Steffen Trumtraredb37a92012-10-28 18:28:06 +010038#include <video/of_videomode.h>
Steffen Trumtrarebc64e42012-11-14 11:22:52 +010039#include <video/videomode.h>
Dave Airlief453ba02008-11-07 14:05:41 -080040
41/**
42 * drm_mode_debug_printmodeline - debug print a mode
43 * @dev: DRM device
44 * @mode: mode to print
45 *
46 * LOCKING:
47 * None.
48 *
49 * Describe @mode using DRM_DEBUG.
50 */
Ville Syrjälä0b3904a2012-10-25 18:05:05 +000051void drm_mode_debug_printmodeline(const struct drm_display_mode *mode)
Dave Airlief453ba02008-11-07 14:05:41 -080052{
Zhao Yakuif940f372009-07-20 13:48:05 +080053 DRM_DEBUG_KMS("Modeline %d:\"%s\" %d %d %d %d %d %d %d %d %d %d "
Zhao Yakui8a4c47f2009-07-20 13:48:04 +080054 "0x%x 0x%x\n",
yakui_zhaof0531852009-06-02 14:12:47 +080055 mode->base.id, mode->name, mode->vrefresh, mode->clock,
56 mode->hdisplay, mode->hsync_start,
57 mode->hsync_end, mode->htotal,
58 mode->vdisplay, mode->vsync_start,
59 mode->vsync_end, mode->vtotal, mode->type, mode->flags);
Dave Airlief453ba02008-11-07 14:05:41 -080060}
61EXPORT_SYMBOL(drm_mode_debug_printmodeline);
62
63/**
Zhao Yakuid782c3f2009-06-22 13:17:08 +080064 * drm_cvt_mode -create a modeline based on CVT algorithm
65 * @dev: DRM device
66 * @hdisplay: hdisplay size
67 * @vdisplay: vdisplay size
68 * @vrefresh : vrefresh rate
69 * @reduced : Whether the GTF calculation is simplified
70 * @interlaced:Whether the interlace is supported
71 *
72 * LOCKING:
73 * none.
74 *
75 * return the modeline based on CVT algorithm
76 *
77 * This function is called to generate the modeline based on CVT algorithm
78 * according to the hdisplay, vdisplay, vrefresh.
79 * It is based from the VESA(TM) Coordinated Video Timing Generator by
80 * Graham Loveridge April 9, 2003 available at
Justin P. Mattock631dd1a2010-10-18 11:03:14 +020081 * http://www.elo.utfsm.cl/~elo212/docs/CVTd6r1.xls
Zhao Yakuid782c3f2009-06-22 13:17:08 +080082 *
83 * And it is copied from xf86CVTmode in xserver/hw/xfree86/modes/xf86cvt.c.
84 * What I have done is to translate it by using integer calculation.
85 */
86#define HV_FACTOR 1000
87struct drm_display_mode *drm_cvt_mode(struct drm_device *dev, int hdisplay,
88 int vdisplay, int vrefresh,
Dave Airlied50ba252009-09-23 14:44:08 +100089 bool reduced, bool interlaced, bool margins)
Zhao Yakuid782c3f2009-06-22 13:17:08 +080090{
91 /* 1) top/bottom margin size (% of height) - default: 1.8, */
92#define CVT_MARGIN_PERCENTAGE 18
93 /* 2) character cell horizontal granularity (pixels) - default 8 */
94#define CVT_H_GRANULARITY 8
95 /* 3) Minimum vertical porch (lines) - default 3 */
96#define CVT_MIN_V_PORCH 3
97 /* 4) Minimum number of vertical back porch lines - default 6 */
98#define CVT_MIN_V_BPORCH 6
99 /* Pixel Clock step (kHz) */
100#define CVT_CLOCK_STEP 250
101 struct drm_display_mode *drm_mode;
Zhao Yakuid782c3f2009-06-22 13:17:08 +0800102 unsigned int vfieldrate, hperiod;
103 int hdisplay_rnd, hmargin, vdisplay_rnd, vmargin, vsync;
104 int interlace;
105
106 /* allocate the drm_display_mode structure. If failure, we will
107 * return directly
108 */
109 drm_mode = drm_mode_create(dev);
110 if (!drm_mode)
111 return NULL;
112
113 /* the CVT default refresh rate is 60Hz */
114 if (!vrefresh)
115 vrefresh = 60;
116
117 /* the required field fresh rate */
118 if (interlaced)
119 vfieldrate = vrefresh * 2;
120 else
121 vfieldrate = vrefresh;
122
123 /* horizontal pixels */
124 hdisplay_rnd = hdisplay - (hdisplay % CVT_H_GRANULARITY);
125
126 /* determine the left&right borders */
127 hmargin = 0;
128 if (margins) {
129 hmargin = hdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000;
130 hmargin -= hmargin % CVT_H_GRANULARITY;
131 }
132 /* find the total active pixels */
133 drm_mode->hdisplay = hdisplay_rnd + 2 * hmargin;
134
135 /* find the number of lines per field */
136 if (interlaced)
137 vdisplay_rnd = vdisplay / 2;
138 else
139 vdisplay_rnd = vdisplay;
140
141 /* find the top & bottom borders */
142 vmargin = 0;
143 if (margins)
144 vmargin = vdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000;
145
Francisco Jerez841b4112009-08-12 02:30:09 +0200146 drm_mode->vdisplay = vdisplay + 2 * vmargin;
Zhao Yakuid782c3f2009-06-22 13:17:08 +0800147
148 /* Interlaced */
149 if (interlaced)
150 interlace = 1;
151 else
152 interlace = 0;
153
154 /* Determine VSync Width from aspect ratio */
155 if (!(vdisplay % 3) && ((vdisplay * 4 / 3) == hdisplay))
156 vsync = 4;
157 else if (!(vdisplay % 9) && ((vdisplay * 16 / 9) == hdisplay))
158 vsync = 5;
159 else if (!(vdisplay % 10) && ((vdisplay * 16 / 10) == hdisplay))
160 vsync = 6;
161 else if (!(vdisplay % 4) && ((vdisplay * 5 / 4) == hdisplay))
162 vsync = 7;
163 else if (!(vdisplay % 9) && ((vdisplay * 15 / 9) == hdisplay))
164 vsync = 7;
165 else /* custom */
166 vsync = 10;
167
168 if (!reduced) {
169 /* simplify the GTF calculation */
170 /* 4) Minimum time of vertical sync + back porch interval (µs)
171 * default 550.0
172 */
173 int tmp1, tmp2;
174#define CVT_MIN_VSYNC_BP 550
175 /* 3) Nominal HSync width (% of line period) - default 8 */
176#define CVT_HSYNC_PERCENTAGE 8
177 unsigned int hblank_percentage;
178 int vsyncandback_porch, vback_porch, hblank;
179
180 /* estimated the horizontal period */
181 tmp1 = HV_FACTOR * 1000000 -
182 CVT_MIN_VSYNC_BP * HV_FACTOR * vfieldrate;
183 tmp2 = (vdisplay_rnd + 2 * vmargin + CVT_MIN_V_PORCH) * 2 +
184 interlace;
185 hperiod = tmp1 * 2 / (tmp2 * vfieldrate);
186
187 tmp1 = CVT_MIN_VSYNC_BP * HV_FACTOR / hperiod + 1;
188 /* 9. Find number of lines in sync + backporch */
189 if (tmp1 < (vsync + CVT_MIN_V_PORCH))
190 vsyncandback_porch = vsync + CVT_MIN_V_PORCH;
191 else
192 vsyncandback_porch = tmp1;
193 /* 10. Find number of lines in back porch */
194 vback_porch = vsyncandback_porch - vsync;
195 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin +
196 vsyncandback_porch + CVT_MIN_V_PORCH;
197 /* 5) Definition of Horizontal blanking time limitation */
198 /* Gradient (%/kHz) - default 600 */
199#define CVT_M_FACTOR 600
200 /* Offset (%) - default 40 */
201#define CVT_C_FACTOR 40
202 /* Blanking time scaling factor - default 128 */
203#define CVT_K_FACTOR 128
204 /* Scaling factor weighting - default 20 */
205#define CVT_J_FACTOR 20
206#define CVT_M_PRIME (CVT_M_FACTOR * CVT_K_FACTOR / 256)
207#define CVT_C_PRIME ((CVT_C_FACTOR - CVT_J_FACTOR) * CVT_K_FACTOR / 256 + \
208 CVT_J_FACTOR)
209 /* 12. Find ideal blanking duty cycle from formula */
210 hblank_percentage = CVT_C_PRIME * HV_FACTOR - CVT_M_PRIME *
211 hperiod / 1000;
212 /* 13. Blanking time */
213 if (hblank_percentage < 20 * HV_FACTOR)
214 hblank_percentage = 20 * HV_FACTOR;
215 hblank = drm_mode->hdisplay * hblank_percentage /
216 (100 * HV_FACTOR - hblank_percentage);
217 hblank -= hblank % (2 * CVT_H_GRANULARITY);
218 /* 14. find the total pixes per line */
219 drm_mode->htotal = drm_mode->hdisplay + hblank;
220 drm_mode->hsync_end = drm_mode->hdisplay + hblank / 2;
221 drm_mode->hsync_start = drm_mode->hsync_end -
222 (drm_mode->htotal * CVT_HSYNC_PERCENTAGE) / 100;
223 drm_mode->hsync_start += CVT_H_GRANULARITY -
224 drm_mode->hsync_start % CVT_H_GRANULARITY;
225 /* fill the Vsync values */
226 drm_mode->vsync_start = drm_mode->vdisplay + CVT_MIN_V_PORCH;
227 drm_mode->vsync_end = drm_mode->vsync_start + vsync;
228 } else {
229 /* Reduced blanking */
230 /* Minimum vertical blanking interval time (µs)- default 460 */
231#define CVT_RB_MIN_VBLANK 460
232 /* Fixed number of clocks for horizontal sync */
233#define CVT_RB_H_SYNC 32
234 /* Fixed number of clocks for horizontal blanking */
235#define CVT_RB_H_BLANK 160
236 /* Fixed number of lines for vertical front porch - default 3*/
237#define CVT_RB_VFPORCH 3
238 int vbilines;
239 int tmp1, tmp2;
240 /* 8. Estimate Horizontal period. */
241 tmp1 = HV_FACTOR * 1000000 -
242 CVT_RB_MIN_VBLANK * HV_FACTOR * vfieldrate;
243 tmp2 = vdisplay_rnd + 2 * vmargin;
244 hperiod = tmp1 / (tmp2 * vfieldrate);
245 /* 9. Find number of lines in vertical blanking */
246 vbilines = CVT_RB_MIN_VBLANK * HV_FACTOR / hperiod + 1;
247 /* 10. Check if vertical blanking is sufficient */
248 if (vbilines < (CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH))
249 vbilines = CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH;
250 /* 11. Find total number of lines in vertical field */
251 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + vbilines;
252 /* 12. Find total number of pixels in a line */
253 drm_mode->htotal = drm_mode->hdisplay + CVT_RB_H_BLANK;
254 /* Fill in HSync values */
255 drm_mode->hsync_end = drm_mode->hdisplay + CVT_RB_H_BLANK / 2;
Adam Jacksonadde0f22010-08-23 10:19:14 -0400256 drm_mode->hsync_start = drm_mode->hsync_end - CVT_RB_H_SYNC;
257 /* Fill in VSync values */
258 drm_mode->vsync_start = drm_mode->vdisplay + CVT_RB_VFPORCH;
259 drm_mode->vsync_end = drm_mode->vsync_start + vsync;
Zhao Yakuid782c3f2009-06-22 13:17:08 +0800260 }
261 /* 15/13. Find pixel clock frequency (kHz for xf86) */
262 drm_mode->clock = drm_mode->htotal * HV_FACTOR * 1000 / hperiod;
263 drm_mode->clock -= drm_mode->clock % CVT_CLOCK_STEP;
264 /* 18/16. Find actual vertical frame frequency */
265 /* ignore - just set the mode flag for interlaced */
Adam Jackson171fdd82010-03-29 21:43:31 +0000266 if (interlaced) {
Zhao Yakuid782c3f2009-06-22 13:17:08 +0800267 drm_mode->vtotal *= 2;
Adam Jackson171fdd82010-03-29 21:43:31 +0000268 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE;
269 }
Zhao Yakuid782c3f2009-06-22 13:17:08 +0800270 /* Fill the mode line name */
271 drm_mode_set_name(drm_mode);
272 if (reduced)
273 drm_mode->flags |= (DRM_MODE_FLAG_PHSYNC |
274 DRM_MODE_FLAG_NVSYNC);
275 else
276 drm_mode->flags |= (DRM_MODE_FLAG_PVSYNC |
277 DRM_MODE_FLAG_NHSYNC);
Zhao Yakuid782c3f2009-06-22 13:17:08 +0800278
Adam Jackson171fdd82010-03-29 21:43:31 +0000279 return drm_mode;
Zhao Yakuid782c3f2009-06-22 13:17:08 +0800280}
281EXPORT_SYMBOL(drm_cvt_mode);
282
283/**
Adam Jackson7a374352010-03-29 21:43:30 +0000284 * drm_gtf_mode_complex - create the modeline based on full GTF algorithm
Zhao Yakui26bbdad2009-06-22 13:17:09 +0800285 *
286 * @dev :drm device
287 * @hdisplay :hdisplay size
288 * @vdisplay :vdisplay size
289 * @vrefresh :vrefresh rate.
290 * @interlaced :whether the interlace is supported
Adam Jackson7a374352010-03-29 21:43:30 +0000291 * @margins :desired margin size
292 * @GTF_[MCKJ] :extended GTF formula parameters
Zhao Yakui26bbdad2009-06-22 13:17:09 +0800293 *
294 * LOCKING.
295 * none.
296 *
Adam Jackson7a374352010-03-29 21:43:30 +0000297 * return the modeline based on full GTF algorithm.
Zhao Yakui26bbdad2009-06-22 13:17:09 +0800298 *
Adam Jackson7a374352010-03-29 21:43:30 +0000299 * GTF feature blocks specify C and J in multiples of 0.5, so we pass them
300 * in here multiplied by two. For a C of 40, pass in 80.
Zhao Yakui26bbdad2009-06-22 13:17:09 +0800301 */
Adam Jackson7a374352010-03-29 21:43:30 +0000302struct drm_display_mode *
303drm_gtf_mode_complex(struct drm_device *dev, int hdisplay, int vdisplay,
304 int vrefresh, bool interlaced, int margins,
305 int GTF_M, int GTF_2C, int GTF_K, int GTF_2J)
306{ /* 1) top/bottom margin size (% of height) - default: 1.8, */
Zhao Yakui26bbdad2009-06-22 13:17:09 +0800307#define GTF_MARGIN_PERCENTAGE 18
308 /* 2) character cell horizontal granularity (pixels) - default 8 */
309#define GTF_CELL_GRAN 8
310 /* 3) Minimum vertical porch (lines) - default 3 */
311#define GTF_MIN_V_PORCH 1
312 /* width of vsync in lines */
313#define V_SYNC_RQD 3
314 /* width of hsync as % of total line */
315#define H_SYNC_PERCENT 8
316 /* min time of vsync + back porch (microsec) */
317#define MIN_VSYNC_PLUS_BP 550
Zhao Yakui26bbdad2009-06-22 13:17:09 +0800318 /* C' and M' are part of the Blanking Duty Cycle computation */
Adam Jackson7a374352010-03-29 21:43:30 +0000319#define GTF_C_PRIME ((((GTF_2C - GTF_2J) * GTF_K / 256) + GTF_2J) / 2)
320#define GTF_M_PRIME (GTF_K * GTF_M / 256)
Zhao Yakui26bbdad2009-06-22 13:17:09 +0800321 struct drm_display_mode *drm_mode;
322 unsigned int hdisplay_rnd, vdisplay_rnd, vfieldrate_rqd;
323 int top_margin, bottom_margin;
324 int interlace;
325 unsigned int hfreq_est;
326 int vsync_plus_bp, vback_porch;
327 unsigned int vtotal_lines, vfieldrate_est, hperiod;
328 unsigned int vfield_rate, vframe_rate;
329 int left_margin, right_margin;
330 unsigned int total_active_pixels, ideal_duty_cycle;
331 unsigned int hblank, total_pixels, pixel_freq;
332 int hsync, hfront_porch, vodd_front_porch_lines;
333 unsigned int tmp1, tmp2;
334
335 drm_mode = drm_mode_create(dev);
336 if (!drm_mode)
337 return NULL;
338
339 /* 1. In order to give correct results, the number of horizontal
340 * pixels requested is first processed to ensure that it is divisible
341 * by the character size, by rounding it to the nearest character
342 * cell boundary:
343 */
344 hdisplay_rnd = (hdisplay + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN;
345 hdisplay_rnd = hdisplay_rnd * GTF_CELL_GRAN;
346
347 /* 2. If interlace is requested, the number of vertical lines assumed
348 * by the calculation must be halved, as the computation calculates
349 * the number of vertical lines per field.
350 */
351 if (interlaced)
352 vdisplay_rnd = vdisplay / 2;
353 else
354 vdisplay_rnd = vdisplay;
355
356 /* 3. Find the frame rate required: */
357 if (interlaced)
358 vfieldrate_rqd = vrefresh * 2;
359 else
360 vfieldrate_rqd = vrefresh;
361
362 /* 4. Find number of lines in Top margin: */
363 top_margin = 0;
364 if (margins)
365 top_margin = (vdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) /
366 1000;
367 /* 5. Find number of lines in bottom margin: */
368 bottom_margin = top_margin;
369
370 /* 6. If interlace is required, then set variable interlace: */
371 if (interlaced)
372 interlace = 1;
373 else
374 interlace = 0;
375
376 /* 7. Estimate the Horizontal frequency */
377 {
378 tmp1 = (1000000 - MIN_VSYNC_PLUS_BP * vfieldrate_rqd) / 500;
379 tmp2 = (vdisplay_rnd + 2 * top_margin + GTF_MIN_V_PORCH) *
380 2 + interlace;
381 hfreq_est = (tmp2 * 1000 * vfieldrate_rqd) / tmp1;
382 }
383
384 /* 8. Find the number of lines in V sync + back porch */
385 /* [V SYNC+BP] = RINT(([MIN VSYNC+BP] * hfreq_est / 1000000)) */
386 vsync_plus_bp = MIN_VSYNC_PLUS_BP * hfreq_est / 1000;
387 vsync_plus_bp = (vsync_plus_bp + 500) / 1000;
388 /* 9. Find the number of lines in V back porch alone: */
389 vback_porch = vsync_plus_bp - V_SYNC_RQD;
390 /* 10. Find the total number of lines in Vertical field period: */
391 vtotal_lines = vdisplay_rnd + top_margin + bottom_margin +
392 vsync_plus_bp + GTF_MIN_V_PORCH;
393 /* 11. Estimate the Vertical field frequency: */
394 vfieldrate_est = hfreq_est / vtotal_lines;
395 /* 12. Find the actual horizontal period: */
396 hperiod = 1000000 / (vfieldrate_rqd * vtotal_lines);
397
398 /* 13. Find the actual Vertical field frequency: */
399 vfield_rate = hfreq_est / vtotal_lines;
400 /* 14. Find the Vertical frame frequency: */
401 if (interlaced)
402 vframe_rate = vfield_rate / 2;
403 else
404 vframe_rate = vfield_rate;
405 /* 15. Find number of pixels in left margin: */
406 if (margins)
407 left_margin = (hdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) /
408 1000;
409 else
410 left_margin = 0;
411
412 /* 16.Find number of pixels in right margin: */
413 right_margin = left_margin;
414 /* 17.Find total number of active pixels in image and left and right */
415 total_active_pixels = hdisplay_rnd + left_margin + right_margin;
416 /* 18.Find the ideal blanking duty cycle from blanking duty cycle */
417 ideal_duty_cycle = GTF_C_PRIME * 1000 -
418 (GTF_M_PRIME * 1000000 / hfreq_est);
419 /* 19.Find the number of pixels in the blanking time to the nearest
420 * double character cell: */
421 hblank = total_active_pixels * ideal_duty_cycle /
422 (100000 - ideal_duty_cycle);
423 hblank = (hblank + GTF_CELL_GRAN) / (2 * GTF_CELL_GRAN);
424 hblank = hblank * 2 * GTF_CELL_GRAN;
425 /* 20.Find total number of pixels: */
426 total_pixels = total_active_pixels + hblank;
427 /* 21.Find pixel clock frequency: */
428 pixel_freq = total_pixels * hfreq_est / 1000;
429 /* Stage 1 computations are now complete; I should really pass
430 * the results to another function and do the Stage 2 computations,
431 * but I only need a few more values so I'll just append the
432 * computations here for now */
433 /* 17. Find the number of pixels in the horizontal sync period: */
434 hsync = H_SYNC_PERCENT * total_pixels / 100;
435 hsync = (hsync + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN;
436 hsync = hsync * GTF_CELL_GRAN;
437 /* 18. Find the number of pixels in horizontal front porch period */
438 hfront_porch = hblank / 2 - hsync;
439 /* 36. Find the number of lines in the odd front porch period: */
440 vodd_front_porch_lines = GTF_MIN_V_PORCH ;
441
442 /* finally, pack the results in the mode struct */
443 drm_mode->hdisplay = hdisplay_rnd;
444 drm_mode->hsync_start = hdisplay_rnd + hfront_porch;
445 drm_mode->hsync_end = drm_mode->hsync_start + hsync;
446 drm_mode->htotal = total_pixels;
447 drm_mode->vdisplay = vdisplay_rnd;
448 drm_mode->vsync_start = vdisplay_rnd + vodd_front_porch_lines;
449 drm_mode->vsync_end = drm_mode->vsync_start + V_SYNC_RQD;
450 drm_mode->vtotal = vtotal_lines;
451
452 drm_mode->clock = pixel_freq;
453
Zhao Yakui26bbdad2009-06-22 13:17:09 +0800454 if (interlaced) {
455 drm_mode->vtotal *= 2;
456 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE;
457 }
458
Adam Jackson171fdd82010-03-29 21:43:31 +0000459 drm_mode_set_name(drm_mode);
Adam Jacksonc385e50c2010-04-08 19:00:30 +0000460 if (GTF_M == 600 && GTF_2C == 80 && GTF_K == 128 && GTF_2J == 40)
461 drm_mode->flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC;
462 else
463 drm_mode->flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC;
Adam Jackson171fdd82010-03-29 21:43:31 +0000464
Zhao Yakui26bbdad2009-06-22 13:17:09 +0800465 return drm_mode;
466}
Adam Jackson7a374352010-03-29 21:43:30 +0000467EXPORT_SYMBOL(drm_gtf_mode_complex);
468
469/**
470 * drm_gtf_mode - create the modeline based on GTF algorithm
471 *
472 * @dev :drm device
473 * @hdisplay :hdisplay size
474 * @vdisplay :vdisplay size
475 * @vrefresh :vrefresh rate.
476 * @interlaced :whether the interlace is supported
477 * @margins :whether the margin is supported
478 *
479 * LOCKING.
480 * none.
481 *
482 * return the modeline based on GTF algorithm
483 *
484 * This function is to create the modeline based on the GTF algorithm.
485 * Generalized Timing Formula is derived from:
486 * GTF Spreadsheet by Andy Morrish (1/5/97)
487 * available at http://www.vesa.org
488 *
489 * And it is copied from the file of xserver/hw/xfree86/modes/xf86gtf.c.
490 * What I have done is to translate it by using integer calculation.
491 * I also refer to the function of fb_get_mode in the file of
492 * drivers/video/fbmon.c
493 *
494 * Standard GTF parameters:
495 * M = 600
496 * C = 40
497 * K = 128
498 * J = 20
499 */
500struct drm_display_mode *
501drm_gtf_mode(struct drm_device *dev, int hdisplay, int vdisplay, int vrefresh,
502 bool lace, int margins)
503{
504 return drm_gtf_mode_complex(dev, hdisplay, vdisplay, vrefresh, lace,
505 margins, 600, 40 * 2, 128, 20 * 2);
506}
Zhao Yakui26bbdad2009-06-22 13:17:09 +0800507EXPORT_SYMBOL(drm_gtf_mode);
Adam Jackson7a374352010-03-29 21:43:30 +0000508
Tomi Valkeinena38884f2013-03-12 10:15:43 +0200509#ifdef CONFIG_VIDEOMODE_HELPERS
Steffen Trumtrarebc64e42012-11-14 11:22:52 +0100510int drm_display_mode_from_videomode(const struct videomode *vm,
511 struct drm_display_mode *dmode)
512{
513 dmode->hdisplay = vm->hactive;
514 dmode->hsync_start = dmode->hdisplay + vm->hfront_porch;
515 dmode->hsync_end = dmode->hsync_start + vm->hsync_len;
516 dmode->htotal = dmode->hsync_end + vm->hback_porch;
517
518 dmode->vdisplay = vm->vactive;
519 dmode->vsync_start = dmode->vdisplay + vm->vfront_porch;
520 dmode->vsync_end = dmode->vsync_start + vm->vsync_len;
521 dmode->vtotal = dmode->vsync_end + vm->vback_porch;
522
523 dmode->clock = vm->pixelclock / 1000;
524
525 dmode->flags = 0;
Tomi Valkeinen06a33072013-03-12 10:26:45 +0200526 if (vm->flags & DISPLAY_FLAGS_HSYNC_HIGH)
Steffen Trumtrarebc64e42012-11-14 11:22:52 +0100527 dmode->flags |= DRM_MODE_FLAG_PHSYNC;
Tomi Valkeinen06a33072013-03-12 10:26:45 +0200528 else if (vm->flags & DISPLAY_FLAGS_HSYNC_LOW)
Steffen Trumtrarebc64e42012-11-14 11:22:52 +0100529 dmode->flags |= DRM_MODE_FLAG_NHSYNC;
Tomi Valkeinen06a33072013-03-12 10:26:45 +0200530 if (vm->flags & DISPLAY_FLAGS_VSYNC_HIGH)
Steffen Trumtrarebc64e42012-11-14 11:22:52 +0100531 dmode->flags |= DRM_MODE_FLAG_PVSYNC;
Tomi Valkeinen06a33072013-03-12 10:26:45 +0200532 else if (vm->flags & DISPLAY_FLAGS_VSYNC_LOW)
Steffen Trumtrarebc64e42012-11-14 11:22:52 +0100533 dmode->flags |= DRM_MODE_FLAG_NVSYNC;
Tomi Valkeinen06a33072013-03-12 10:26:45 +0200534 if (vm->flags & DISPLAY_FLAGS_INTERLACED)
Steffen Trumtrarebc64e42012-11-14 11:22:52 +0100535 dmode->flags |= DRM_MODE_FLAG_INTERLACE;
Tomi Valkeinen06a33072013-03-12 10:26:45 +0200536 if (vm->flags & DISPLAY_FLAGS_DOUBLESCAN)
Steffen Trumtrarebc64e42012-11-14 11:22:52 +0100537 dmode->flags |= DRM_MODE_FLAG_DBLSCAN;
Steffen Trumtrar328a4712013-05-27 12:33:35 +0000538 if (vm->flags & DISPLAY_FLAGS_DOUBLECLK)
539 dmode->flags |= DRM_MODE_FLAG_DBLCLK;
Steffen Trumtrarebc64e42012-11-14 11:22:52 +0100540 drm_mode_set_name(dmode);
541
542 return 0;
543}
544EXPORT_SYMBOL_GPL(drm_display_mode_from_videomode);
Steffen Trumtrarebc64e42012-11-14 11:22:52 +0100545
Tomi Valkeinena38884f2013-03-12 10:15:43 +0200546#ifdef CONFIG_OF
Steffen Trumtraredb37a92012-10-28 18:28:06 +0100547/**
548 * of_get_drm_display_mode - get a drm_display_mode from devicetree
549 * @np: device_node with the timing specification
550 * @dmode: will be set to the return value
551 * @index: index into the list of display timings in devicetree
552 *
553 * This function is expensive and should only be used, if only one mode is to be
554 * read from DT. To get multiple modes start with of_get_display_timings and
555 * work with that instead.
556 */
557int of_get_drm_display_mode(struct device_node *np,
558 struct drm_display_mode *dmode, int index)
559{
560 struct videomode vm;
561 int ret;
562
563 ret = of_get_videomode(np, &vm, index);
564 if (ret)
565 return ret;
566
567 drm_display_mode_from_videomode(&vm, dmode);
568
569 pr_debug("%s: got %dx%d display mode from %s\n",
570 of_node_full_name(np), vm.hactive, vm.vactive, np->name);
571 drm_mode_debug_printmodeline(dmode);
572
573 return 0;
574}
575EXPORT_SYMBOL_GPL(of_get_drm_display_mode);
Tomi Valkeinena38884f2013-03-12 10:15:43 +0200576#endif /* CONFIG_OF */
577#endif /* CONFIG_VIDEOMODE_HELPERS */
Steffen Trumtraredb37a92012-10-28 18:28:06 +0100578
Zhao Yakui26bbdad2009-06-22 13:17:09 +0800579/**
Dave Airlief453ba02008-11-07 14:05:41 -0800580 * drm_mode_set_name - set the name on a mode
581 * @mode: name will be set in this mode
582 *
583 * LOCKING:
584 * None.
585 *
586 * Set the name of @mode to a standard format.
587 */
588void drm_mode_set_name(struct drm_display_mode *mode)
589{
Adam Jackson171fdd82010-03-29 21:43:31 +0000590 bool interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
591
592 snprintf(mode->name, DRM_DISPLAY_MODE_LEN, "%dx%d%s",
593 mode->hdisplay, mode->vdisplay,
594 interlaced ? "i" : "");
Dave Airlief453ba02008-11-07 14:05:41 -0800595}
596EXPORT_SYMBOL(drm_mode_set_name);
597
598/**
Dave Airlief453ba02008-11-07 14:05:41 -0800599 * drm_mode_width - get the width of a mode
600 * @mode: mode
601 *
602 * LOCKING:
603 * None.
604 *
605 * Return @mode's width (hdisplay) value.
606 *
607 * FIXME: is this needed?
608 *
609 * RETURNS:
610 * @mode->hdisplay
611 */
Ville Syrjälä0b3904a2012-10-25 18:05:05 +0000612int drm_mode_width(const struct drm_display_mode *mode)
Dave Airlief453ba02008-11-07 14:05:41 -0800613{
614 return mode->hdisplay;
615
616}
617EXPORT_SYMBOL(drm_mode_width);
618
619/**
620 * drm_mode_height - get the height of a mode
621 * @mode: mode
622 *
623 * LOCKING:
624 * None.
625 *
626 * Return @mode's height (vdisplay) value.
627 *
628 * FIXME: is this needed?
629 *
630 * RETURNS:
631 * @mode->vdisplay
632 */
Ville Syrjälä0b3904a2012-10-25 18:05:05 +0000633int drm_mode_height(const struct drm_display_mode *mode)
Dave Airlief453ba02008-11-07 14:05:41 -0800634{
635 return mode->vdisplay;
636}
637EXPORT_SYMBOL(drm_mode_height);
638
Adam Jackson7ac96a92009-12-03 17:44:37 -0500639/** drm_mode_hsync - get the hsync of a mode
640 * @mode: mode
641 *
642 * LOCKING:
643 * None.
644 *
645 * Return @modes's hsync rate in kHz, rounded to the nearest int.
646 */
Chris Wilsonb1f559e2011-01-26 09:49:47 +0000647int drm_mode_hsync(const struct drm_display_mode *mode)
Adam Jackson7ac96a92009-12-03 17:44:37 -0500648{
649 unsigned int calc_val;
650
651 if (mode->hsync)
652 return mode->hsync;
653
654 if (mode->htotal < 0)
655 return 0;
656
657 calc_val = (mode->clock * 1000) / mode->htotal; /* hsync in Hz */
658 calc_val += 500; /* round to 1000Hz */
659 calc_val /= 1000; /* truncate to kHz */
660
661 return calc_val;
662}
663EXPORT_SYMBOL(drm_mode_hsync);
664
Dave Airlief453ba02008-11-07 14:05:41 -0800665/**
666 * drm_mode_vrefresh - get the vrefresh of a mode
667 * @mode: mode
668 *
669 * LOCKING:
670 * None.
671 *
Adam Jackson7ac96a92009-12-03 17:44:37 -0500672 * Return @mode's vrefresh rate in Hz or calculate it if necessary.
Dave Airlief453ba02008-11-07 14:05:41 -0800673 *
674 * FIXME: why is this needed? shouldn't vrefresh be set already?
675 *
676 * RETURNS:
Zhao Yakui559ee212009-09-03 09:33:47 +0800677 * Vertical refresh rate. It will be the result of actual value plus 0.5.
678 * If it is 70.288, it will return 70Hz.
679 * If it is 59.6, it will return 60Hz.
Dave Airlief453ba02008-11-07 14:05:41 -0800680 */
Chris Wilsonb1f559e2011-01-26 09:49:47 +0000681int drm_mode_vrefresh(const struct drm_display_mode *mode)
Dave Airlief453ba02008-11-07 14:05:41 -0800682{
683 int refresh = 0;
684 unsigned int calc_val;
685
686 if (mode->vrefresh > 0)
687 refresh = mode->vrefresh;
688 else if (mode->htotal > 0 && mode->vtotal > 0) {
Zhao Yakui559ee212009-09-03 09:33:47 +0800689 int vtotal;
690 vtotal = mode->vtotal;
Dave Airlief453ba02008-11-07 14:05:41 -0800691 /* work out vrefresh the value will be x1000 */
692 calc_val = (mode->clock * 1000);
Dave Airlief453ba02008-11-07 14:05:41 -0800693 calc_val /= mode->htotal;
Zhao Yakui559ee212009-09-03 09:33:47 +0800694 refresh = (calc_val + vtotal / 2) / vtotal;
Dave Airlief453ba02008-11-07 14:05:41 -0800695
Dave Airlief453ba02008-11-07 14:05:41 -0800696 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
697 refresh *= 2;
698 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
699 refresh /= 2;
700 if (mode->vscan > 1)
701 refresh /= mode->vscan;
702 }
703 return refresh;
704}
705EXPORT_SYMBOL(drm_mode_vrefresh);
706
707/**
708 * drm_mode_set_crtcinfo - set CRTC modesetting parameters
709 * @p: mode
Damien Lespiau448cce22013-09-25 16:45:35 +0100710 * @adjust_flags: a combination of adjustment flags
Dave Airlief453ba02008-11-07 14:05:41 -0800711 *
712 * LOCKING:
713 * None.
714 *
715 * Setup the CRTC modesetting parameters for @p, adjusting if necessary.
Damien Lespiau448cce22013-09-25 16:45:35 +0100716 *
717 * - The CRTC_INTERLACE_HALVE_V flag can be used to halve vertical timings of
718 * interlaced modes.
719 * - The CRTC_STEREO_DOUBLE flag can be used to compute the timings for
720 * buffers containing two eyes (only adjust the timings when needed, eg. for
721 * "frame packing" or "side by side full").
Dave Airlief453ba02008-11-07 14:05:41 -0800722 */
723void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags)
724{
725 if ((p == NULL) || ((p->type & DRM_MODE_TYPE_CRTC_C) == DRM_MODE_TYPE_BUILTIN))
726 return;
727
Damien Lespiaubde2dcf2013-09-25 16:45:34 +0100728 p->crtc_clock = p->clock;
Dave Airlief453ba02008-11-07 14:05:41 -0800729 p->crtc_hdisplay = p->hdisplay;
730 p->crtc_hsync_start = p->hsync_start;
731 p->crtc_hsync_end = p->hsync_end;
732 p->crtc_htotal = p->htotal;
733 p->crtc_hskew = p->hskew;
734 p->crtc_vdisplay = p->vdisplay;
735 p->crtc_vsync_start = p->vsync_start;
736 p->crtc_vsync_end = p->vsync_end;
737 p->crtc_vtotal = p->vtotal;
738
739 if (p->flags & DRM_MODE_FLAG_INTERLACE) {
740 if (adjust_flags & CRTC_INTERLACE_HALVE_V) {
741 p->crtc_vdisplay /= 2;
742 p->crtc_vsync_start /= 2;
743 p->crtc_vsync_end /= 2;
744 p->crtc_vtotal /= 2;
745 }
Dave Airlief453ba02008-11-07 14:05:41 -0800746 }
747
748 if (p->flags & DRM_MODE_FLAG_DBLSCAN) {
749 p->crtc_vdisplay *= 2;
750 p->crtc_vsync_start *= 2;
751 p->crtc_vsync_end *= 2;
752 p->crtc_vtotal *= 2;
753 }
754
755 if (p->vscan > 1) {
756 p->crtc_vdisplay *= p->vscan;
757 p->crtc_vsync_start *= p->vscan;
758 p->crtc_vsync_end *= p->vscan;
759 p->crtc_vtotal *= p->vscan;
760 }
761
Damien Lespiau448cce22013-09-25 16:45:35 +0100762 if (adjust_flags & CRTC_STEREO_DOUBLE) {
763 unsigned int layout = p->flags & DRM_MODE_FLAG_3D_MASK;
764
765 switch (layout) {
766 case DRM_MODE_FLAG_3D_FRAME_PACKING:
767 p->crtc_clock *= 2;
768 p->crtc_vdisplay += p->crtc_vtotal;
769 p->crtc_vsync_start += p->crtc_vtotal;
770 p->crtc_vsync_end += p->crtc_vtotal;
771 p->crtc_vtotal += p->crtc_vtotal;
772 break;
773 }
774 }
775
Dave Airlief453ba02008-11-07 14:05:41 -0800776 p->crtc_vblank_start = min(p->crtc_vsync_start, p->crtc_vdisplay);
777 p->crtc_vblank_end = max(p->crtc_vsync_end, p->crtc_vtotal);
778 p->crtc_hblank_start = min(p->crtc_hsync_start, p->crtc_hdisplay);
779 p->crtc_hblank_end = max(p->crtc_hsync_end, p->crtc_htotal);
Dave Airlief453ba02008-11-07 14:05:41 -0800780}
781EXPORT_SYMBOL(drm_mode_set_crtcinfo);
782
783
784/**
Ville Syrjäläc3c50e82012-03-13 12:35:51 +0200785 * drm_mode_copy - copy the mode
786 * @dst: mode to overwrite
787 * @src: mode to copy
788 *
789 * LOCKING:
790 * None.
791 *
Ville Syrjälä72e45e92013-05-31 12:17:06 +0000792 * Copy an existing mode into another mode, preserving the object id and
793 * list head of the destination mode.
Ville Syrjäläc3c50e82012-03-13 12:35:51 +0200794 */
795void drm_mode_copy(struct drm_display_mode *dst, const struct drm_display_mode *src)
796{
797 int id = dst->base.id;
Ville Syrjälä72e45e92013-05-31 12:17:06 +0000798 struct list_head head = dst->head;
Ville Syrjäläc3c50e82012-03-13 12:35:51 +0200799
800 *dst = *src;
801 dst->base.id = id;
Ville Syrjälä72e45e92013-05-31 12:17:06 +0000802 dst->head = head;
Ville Syrjäläc3c50e82012-03-13 12:35:51 +0200803}
804EXPORT_SYMBOL(drm_mode_copy);
805
806/**
Dave Airlief453ba02008-11-07 14:05:41 -0800807 * drm_mode_duplicate - allocate and duplicate an existing mode
808 * @m: mode to duplicate
809 *
810 * LOCKING:
811 * None.
812 *
813 * Just allocate a new mode, copy the existing mode into it, and return
814 * a pointer to it. Used to create new instances of established modes.
815 */
816struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev,
Chris Wilsonb1f559e2011-01-26 09:49:47 +0000817 const struct drm_display_mode *mode)
Dave Airlief453ba02008-11-07 14:05:41 -0800818{
819 struct drm_display_mode *nmode;
Dave Airlief453ba02008-11-07 14:05:41 -0800820
821 nmode = drm_mode_create(dev);
822 if (!nmode)
823 return NULL;
824
Ville Syrjäläc3c50e82012-03-13 12:35:51 +0200825 drm_mode_copy(nmode, mode);
826
Dave Airlief453ba02008-11-07 14:05:41 -0800827 return nmode;
828}
829EXPORT_SYMBOL(drm_mode_duplicate);
830
831/**
832 * drm_mode_equal - test modes for equality
833 * @mode1: first mode
834 * @mode2: second mode
835 *
836 * LOCKING:
837 * None.
838 *
839 * Check to see if @mode1 and @mode2 are equivalent.
840 *
841 * RETURNS:
842 * True if the modes are equal, false otherwise.
843 */
Ville Syrjälä0b3904a2012-10-25 18:05:05 +0000844bool drm_mode_equal(const struct drm_display_mode *mode1, const struct drm_display_mode *mode2)
Dave Airlief453ba02008-11-07 14:05:41 -0800845{
846 /* do clock check convert to PICOS so fb modes get matched
847 * the same */
848 if (mode1->clock && mode2->clock) {
849 if (KHZ2PICOS(mode1->clock) != KHZ2PICOS(mode2->clock))
850 return false;
851 } else if (mode1->clock != mode2->clock)
852 return false;
853
Damien Lespiauf2ecf2e32013-09-25 16:45:27 +0100854 if ((mode1->flags & DRM_MODE_FLAG_3D_MASK) !=
855 (mode2->flags & DRM_MODE_FLAG_3D_MASK))
856 return false;
857
858 return drm_mode_equal_no_clocks_no_stereo(mode1, mode2);
Ville Syrjälä8cc3f232013-04-24 19:07:16 +0300859}
860EXPORT_SYMBOL(drm_mode_equal);
861
862/**
Damien Lespiauf2ecf2e32013-09-25 16:45:27 +0100863 * drm_mode_equal_no_clocks_no_stereo - test modes for equality
Ville Syrjälä8cc3f232013-04-24 19:07:16 +0300864 * @mode1: first mode
865 * @mode2: second mode
866 *
867 * LOCKING:
868 * None.
869 *
870 * Check to see if @mode1 and @mode2 are equivalent, but
Damien Lespiauf2ecf2e32013-09-25 16:45:27 +0100871 * don't check the pixel clocks nor the stereo layout.
Ville Syrjälä8cc3f232013-04-24 19:07:16 +0300872 *
873 * RETURNS:
874 * True if the modes are equal, false otherwise.
875 */
Damien Lespiauf2ecf2e32013-09-25 16:45:27 +0100876bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1,
877 const struct drm_display_mode *mode2)
Ville Syrjälä8cc3f232013-04-24 19:07:16 +0300878{
Dave Airlief453ba02008-11-07 14:05:41 -0800879 if (mode1->hdisplay == mode2->hdisplay &&
880 mode1->hsync_start == mode2->hsync_start &&
881 mode1->hsync_end == mode2->hsync_end &&
882 mode1->htotal == mode2->htotal &&
883 mode1->hskew == mode2->hskew &&
884 mode1->vdisplay == mode2->vdisplay &&
885 mode1->vsync_start == mode2->vsync_start &&
886 mode1->vsync_end == mode2->vsync_end &&
887 mode1->vtotal == mode2->vtotal &&
888 mode1->vscan == mode2->vscan &&
Damien Lespiauf2ecf2e32013-09-25 16:45:27 +0100889 (mode1->flags & ~DRM_MODE_FLAG_3D_MASK) ==
890 (mode2->flags & ~DRM_MODE_FLAG_3D_MASK))
Dave Airlief453ba02008-11-07 14:05:41 -0800891 return true;
892
893 return false;
894}
Damien Lespiauf2ecf2e32013-09-25 16:45:27 +0100895EXPORT_SYMBOL(drm_mode_equal_no_clocks_no_stereo);
Dave Airlief453ba02008-11-07 14:05:41 -0800896
897/**
898 * drm_mode_validate_size - make sure modes adhere to size constraints
899 * @dev: DRM device
900 * @mode_list: list of modes to check
901 * @maxX: maximum width
902 * @maxY: maximum height
903 * @maxPitch: max pitch
904 *
905 * LOCKING:
906 * Caller must hold a lock protecting @mode_list.
907 *
908 * The DRM device (@dev) has size and pitch limits. Here we validate the
909 * modes we probed for @dev against those limits and set their status as
910 * necessary.
911 */
912void drm_mode_validate_size(struct drm_device *dev,
913 struct list_head *mode_list,
914 int maxX, int maxY, int maxPitch)
915{
916 struct drm_display_mode *mode;
917
918 list_for_each_entry(mode, mode_list, head) {
919 if (maxPitch > 0 && mode->hdisplay > maxPitch)
920 mode->status = MODE_BAD_WIDTH;
921
922 if (maxX > 0 && mode->hdisplay > maxX)
923 mode->status = MODE_VIRTUAL_X;
924
925 if (maxY > 0 && mode->vdisplay > maxY)
926 mode->status = MODE_VIRTUAL_Y;
927 }
928}
929EXPORT_SYMBOL(drm_mode_validate_size);
930
931/**
Dave Airlief453ba02008-11-07 14:05:41 -0800932 * drm_mode_prune_invalid - remove invalid modes from mode list
933 * @dev: DRM device
934 * @mode_list: list of modes to check
935 * @verbose: be verbose about it
936 *
937 * LOCKING:
938 * Caller must hold a lock protecting @mode_list.
939 *
940 * Once mode list generation is complete, a caller can use this routine to
941 * remove invalid modes from a mode list. If any of the modes have a
942 * status other than %MODE_OK, they are removed from @mode_list and freed.
943 */
944void drm_mode_prune_invalid(struct drm_device *dev,
945 struct list_head *mode_list, bool verbose)
946{
947 struct drm_display_mode *mode, *t;
948
949 list_for_each_entry_safe(mode, t, mode_list, head) {
950 if (mode->status != MODE_OK) {
951 list_del(&mode->head);
952 if (verbose) {
953 drm_mode_debug_printmodeline(mode);
Zhao Yakuif940f372009-07-20 13:48:05 +0800954 DRM_DEBUG_KMS("Not using %s mode %d\n",
yakui_zhaof0531852009-06-02 14:12:47 +0800955 mode->name, mode->status);
Dave Airlief453ba02008-11-07 14:05:41 -0800956 }
957 drm_mode_destroy(dev, mode);
958 }
959 }
960}
961EXPORT_SYMBOL(drm_mode_prune_invalid);
962
963/**
964 * drm_mode_compare - compare modes for favorability
Dave Chinner2c761272010-01-12 17:39:16 +1100965 * @priv: unused
Dave Airlief453ba02008-11-07 14:05:41 -0800966 * @lh_a: list_head for first mode
967 * @lh_b: list_head for second mode
968 *
969 * LOCKING:
970 * None.
971 *
972 * Compare two modes, given by @lh_a and @lh_b, returning a value indicating
973 * which is better.
974 *
975 * RETURNS:
976 * Negative if @lh_a is better than @lh_b, zero if they're equivalent, or
977 * positive if @lh_b is better than @lh_a.
978 */
Dave Chinner2c761272010-01-12 17:39:16 +1100979static int drm_mode_compare(void *priv, struct list_head *lh_a, struct list_head *lh_b)
Dave Airlief453ba02008-11-07 14:05:41 -0800980{
981 struct drm_display_mode *a = list_entry(lh_a, struct drm_display_mode, head);
982 struct drm_display_mode *b = list_entry(lh_b, struct drm_display_mode, head);
983 int diff;
984
985 diff = ((b->type & DRM_MODE_TYPE_PREFERRED) != 0) -
986 ((a->type & DRM_MODE_TYPE_PREFERRED) != 0);
987 if (diff)
988 return diff;
989 diff = b->hdisplay * b->vdisplay - a->hdisplay * a->vdisplay;
990 if (diff)
991 return diff;
Ville Syrjälä9bc3cd52013-05-31 12:17:08 +0000992
993 diff = b->vrefresh - a->vrefresh;
994 if (diff)
995 return diff;
996
Dave Airlief453ba02008-11-07 14:05:41 -0800997 diff = b->clock - a->clock;
998 return diff;
999}
1000
Dave Airlief453ba02008-11-07 14:05:41 -08001001/**
1002 * drm_mode_sort - sort mode list
1003 * @mode_list: list to sort
1004 *
1005 * LOCKING:
1006 * Caller must hold a lock protecting @mode_list.
1007 *
1008 * Sort @mode_list by favorability, putting good modes first.
1009 */
1010void drm_mode_sort(struct list_head *mode_list)
1011{
Dave Chinner2c761272010-01-12 17:39:16 +11001012 list_sort(NULL, mode_list, drm_mode_compare);
Dave Airlief453ba02008-11-07 14:05:41 -08001013}
1014EXPORT_SYMBOL(drm_mode_sort);
1015
1016/**
1017 * drm_mode_connector_list_update - update the mode list for the connector
1018 * @connector: the connector to update
1019 *
1020 * LOCKING:
1021 * Caller must hold a lock protecting @mode_list.
1022 *
1023 * This moves the modes from the @connector probed_modes list
1024 * to the actual mode list. It compares the probed mode against the current
1025 * list and only adds different modes. All modes unverified after this point
1026 * will be removed by the prune invalid modes.
1027 */
1028void drm_mode_connector_list_update(struct drm_connector *connector)
1029{
1030 struct drm_display_mode *mode;
1031 struct drm_display_mode *pmode, *pt;
1032 int found_it;
1033
1034 list_for_each_entry_safe(pmode, pt, &connector->probed_modes,
1035 head) {
1036 found_it = 0;
1037 /* go through current modes checking for the new probed mode */
1038 list_for_each_entry(mode, &connector->modes, head) {
1039 if (drm_mode_equal(pmode, mode)) {
1040 found_it = 1;
1041 /* if equal delete the probed mode */
1042 mode->status = pmode->status;
Keith Packard38d54872009-07-20 14:49:17 -07001043 /* Merge type bits together */
1044 mode->type |= pmode->type;
Dave Airlief453ba02008-11-07 14:05:41 -08001045 list_del(&pmode->head);
1046 drm_mode_destroy(connector->dev, pmode);
1047 break;
1048 }
1049 }
1050
1051 if (!found_it) {
1052 list_move_tail(&pmode->head, &connector->modes);
1053 }
1054 }
1055}
1056EXPORT_SYMBOL(drm_mode_connector_list_update);
Chris Wilson1794d252011-04-17 07:43:32 +01001057
1058/**
1059 * drm_mode_parse_command_line_for_connector - parse command line for connector
1060 * @mode_option - per connector mode option
1061 * @connector - connector to parse line for
1062 *
1063 * This parses the connector specific then generic command lines for
1064 * modes and options to configure the connector.
1065 *
1066 * This uses the same parameters as the fb modedb.c, except for extra
1067 * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd]
1068 *
1069 * enable/enable Digital/disable bit at the end
1070 */
1071bool drm_mode_parse_command_line_for_connector(const char *mode_option,
1072 struct drm_connector *connector,
1073 struct drm_cmdline_mode *mode)
1074{
1075 const char *name;
1076 unsigned int namelen;
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001077 bool res_specified = false, bpp_specified = false, refresh_specified = false;
Chris Wilson1794d252011-04-17 07:43:32 +01001078 unsigned int xres = 0, yres = 0, bpp = 32, refresh = 0;
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001079 bool yres_specified = false, cvt = false, rb = false;
1080 bool interlace = false, margins = false, was_digit = false;
Chris Wilson1794d252011-04-17 07:43:32 +01001081 int i;
1082 enum drm_connector_force force = DRM_FORCE_UNSPECIFIED;
1083
Dave Airliecb3c4382011-05-04 13:08:58 +10001084#ifdef CONFIG_FB
Chris Wilson1794d252011-04-17 07:43:32 +01001085 if (!mode_option)
1086 mode_option = fb_mode_option;
Dave Airliecb3c4382011-05-04 13:08:58 +10001087#endif
Chris Wilson1794d252011-04-17 07:43:32 +01001088
1089 if (!mode_option) {
1090 mode->specified = false;
1091 return false;
1092 }
1093
1094 name = mode_option;
1095 namelen = strlen(name);
1096 for (i = namelen-1; i >= 0; i--) {
1097 switch (name[i]) {
1098 case '@':
Chris Wilson1794d252011-04-17 07:43:32 +01001099 if (!refresh_specified && !bpp_specified &&
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001100 !yres_specified && !cvt && !rb && was_digit) {
Chris Wilson1794d252011-04-17 07:43:32 +01001101 refresh = simple_strtol(&name[i+1], NULL, 10);
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001102 refresh_specified = true;
1103 was_digit = false;
Chris Wilson1794d252011-04-17 07:43:32 +01001104 } else
1105 goto done;
1106 break;
1107 case '-':
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001108 if (!bpp_specified && !yres_specified && !cvt &&
1109 !rb && was_digit) {
Chris Wilson1794d252011-04-17 07:43:32 +01001110 bpp = simple_strtol(&name[i+1], NULL, 10);
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001111 bpp_specified = true;
1112 was_digit = false;
Chris Wilson1794d252011-04-17 07:43:32 +01001113 } else
1114 goto done;
1115 break;
1116 case 'x':
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001117 if (!yres_specified && was_digit) {
Chris Wilson1794d252011-04-17 07:43:32 +01001118 yres = simple_strtol(&name[i+1], NULL, 10);
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001119 yres_specified = true;
1120 was_digit = false;
Chris Wilson1794d252011-04-17 07:43:32 +01001121 } else
1122 goto done;
Damien Lespiau97fbfbf2013-05-08 17:03:30 +01001123 break;
Chris Wilson1794d252011-04-17 07:43:32 +01001124 case '0' ... '9':
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001125 was_digit = true;
Chris Wilson1794d252011-04-17 07:43:32 +01001126 break;
1127 case 'M':
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001128 if (yres_specified || cvt || was_digit)
1129 goto done;
1130 cvt = true;
Chris Wilson1794d252011-04-17 07:43:32 +01001131 break;
1132 case 'R':
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001133 if (yres_specified || cvt || rb || was_digit)
1134 goto done;
1135 rb = true;
Chris Wilson1794d252011-04-17 07:43:32 +01001136 break;
1137 case 'm':
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001138 if (cvt || yres_specified || was_digit)
1139 goto done;
1140 margins = true;
Chris Wilson1794d252011-04-17 07:43:32 +01001141 break;
1142 case 'i':
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001143 if (cvt || yres_specified || was_digit)
1144 goto done;
1145 interlace = true;
Chris Wilson1794d252011-04-17 07:43:32 +01001146 break;
1147 case 'e':
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001148 if (yres_specified || bpp_specified || refresh_specified ||
1149 was_digit || (force != DRM_FORCE_UNSPECIFIED))
1150 goto done;
1151
Chris Wilson1794d252011-04-17 07:43:32 +01001152 force = DRM_FORCE_ON;
1153 break;
1154 case 'D':
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001155 if (yres_specified || bpp_specified || refresh_specified ||
1156 was_digit || (force != DRM_FORCE_UNSPECIFIED))
1157 goto done;
1158
Chris Wilson1794d252011-04-17 07:43:32 +01001159 if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) &&
1160 (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB))
1161 force = DRM_FORCE_ON;
1162 else
1163 force = DRM_FORCE_ON_DIGITAL;
1164 break;
1165 case 'd':
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001166 if (yres_specified || bpp_specified || refresh_specified ||
1167 was_digit || (force != DRM_FORCE_UNSPECIFIED))
1168 goto done;
1169
Chris Wilson1794d252011-04-17 07:43:32 +01001170 force = DRM_FORCE_OFF;
1171 break;
1172 default:
1173 goto done;
1174 }
1175 }
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001176
Chris Wilson1794d252011-04-17 07:43:32 +01001177 if (i < 0 && yres_specified) {
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001178 char *ch;
1179 xres = simple_strtol(name, &ch, 10);
1180 if ((ch != NULL) && (*ch == 'x'))
1181 res_specified = true;
1182 else
1183 i = ch - name;
1184 } else if (!yres_specified && was_digit) {
1185 /* catch mode that begins with digits but has no 'x' */
1186 i = 0;
Chris Wilson1794d252011-04-17 07:43:32 +01001187 }
1188done:
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001189 if (i >= 0) {
1190 printk(KERN_WARNING
1191 "parse error at position %i in video mode '%s'\n",
1192 i, name);
1193 mode->specified = false;
1194 return false;
1195 }
1196
Chris Wilson1794d252011-04-17 07:43:32 +01001197 if (res_specified) {
1198 mode->specified = true;
1199 mode->xres = xres;
1200 mode->yres = yres;
1201 }
1202
1203 if (refresh_specified) {
1204 mode->refresh_specified = true;
1205 mode->refresh = refresh;
1206 }
1207
1208 if (bpp_specified) {
1209 mode->bpp_specified = true;
1210 mode->bpp = bpp;
1211 }
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001212 mode->rb = rb;
1213 mode->cvt = cvt;
1214 mode->interlace = interlace;
1215 mode->margins = margins;
Chris Wilson1794d252011-04-17 07:43:32 +01001216 mode->force = force;
1217
1218 return true;
1219}
1220EXPORT_SYMBOL(drm_mode_parse_command_line_for_connector);
1221
1222struct drm_display_mode *
1223drm_mode_create_from_cmdline_mode(struct drm_device *dev,
1224 struct drm_cmdline_mode *cmd)
1225{
1226 struct drm_display_mode *mode;
1227
1228 if (cmd->cvt)
1229 mode = drm_cvt_mode(dev,
1230 cmd->xres, cmd->yres,
1231 cmd->refresh_specified ? cmd->refresh : 60,
1232 cmd->rb, cmd->interlace,
1233 cmd->margins);
1234 else
1235 mode = drm_gtf_mode(dev,
1236 cmd->xres, cmd->yres,
1237 cmd->refresh_specified ? cmd->refresh : 60,
1238 cmd->interlace,
1239 cmd->margins);
1240 if (!mode)
1241 return NULL;
1242
1243 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
1244 return mode;
1245}
1246EXPORT_SYMBOL(drm_mode_create_from_cmdline_mode);