Line data Source code
1 : /*
2 : * 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>
6 : * Copyright 2005-2006 Luc Verhaegen
7 : * Copyright (c) 2001, Andy Ritger aritger@nvidia.com
8 : *
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 : #ifdef __linux__
34 : #include <linux/list.h>
35 : #include <linux/list_sort.h>
36 : #include <linux/export.h>
37 : #endif
38 : #include <dev/pci/drm/drmP.h>
39 : #include <dev/pci/drm/drm_crtc.h>
40 : #ifdef __linux__
41 : #include <video/of_videomode.h>
42 : #include <video/videomode.h>
43 : #endif
44 : #include <dev/pci/drm/drm_modes.h>
45 :
46 : #include "drm_crtc_internal.h"
47 :
48 : /**
49 : * drm_mode_debug_printmodeline - print a mode to dmesg
50 : * @mode: mode to print
51 : *
52 : * Describe @mode using DRM_DEBUG.
53 : */
54 0 : void drm_mode_debug_printmodeline(const struct drm_display_mode *mode)
55 : {
56 : DRM_DEBUG_KMS("Modeline %d:\"%s\" %d %d %d %d %d %d %d %d %d %d "
57 : "0x%x 0x%x\n",
58 : mode->base.id, mode->name, mode->vrefresh, mode->clock,
59 : mode->hdisplay, mode->hsync_start,
60 : mode->hsync_end, mode->htotal,
61 : mode->vdisplay, mode->vsync_start,
62 : mode->vsync_end, mode->vtotal, mode->type, mode->flags);
63 0 : }
64 : EXPORT_SYMBOL(drm_mode_debug_printmodeline);
65 :
66 : /**
67 : * drm_mode_create - create a new display mode
68 : * @dev: DRM device
69 : *
70 : * Create a new, cleared drm_display_mode with kzalloc, allocate an ID for it
71 : * and return it.
72 : *
73 : * Returns:
74 : * Pointer to new mode on success, NULL on error.
75 : */
76 0 : struct drm_display_mode *drm_mode_create(struct drm_device *dev)
77 : {
78 : struct drm_display_mode *nmode;
79 :
80 0 : nmode = kzalloc(sizeof(struct drm_display_mode), GFP_KERNEL);
81 0 : if (!nmode)
82 0 : return NULL;
83 :
84 0 : if (drm_mode_object_get(dev, &nmode->base, DRM_MODE_OBJECT_MODE)) {
85 0 : kfree(nmode);
86 0 : return NULL;
87 : }
88 :
89 0 : return nmode;
90 0 : }
91 : EXPORT_SYMBOL(drm_mode_create);
92 :
93 : /**
94 : * drm_mode_destroy - remove a mode
95 : * @dev: DRM device
96 : * @mode: mode to remove
97 : *
98 : * Release @mode's unique ID, then free it @mode structure itself using kfree.
99 : */
100 0 : void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode)
101 : {
102 0 : if (!mode)
103 : return;
104 :
105 0 : drm_mode_object_put(dev, &mode->base);
106 :
107 0 : kfree(mode);
108 0 : }
109 : EXPORT_SYMBOL(drm_mode_destroy);
110 :
111 : /**
112 : * drm_mode_probed_add - add a mode to a connector's probed_mode list
113 : * @connector: connector the new mode
114 : * @mode: mode data
115 : *
116 : * Add @mode to @connector's probed_mode list for later use. This list should
117 : * then in a second step get filtered and all the modes actually supported by
118 : * the hardware moved to the @connector's modes list.
119 : */
120 0 : void drm_mode_probed_add(struct drm_connector *connector,
121 : struct drm_display_mode *mode)
122 : {
123 0 : WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex));
124 :
125 0 : list_add_tail(&mode->head, &connector->probed_modes);
126 0 : }
127 : EXPORT_SYMBOL(drm_mode_probed_add);
128 :
129 : /**
130 : * drm_cvt_mode -create a modeline based on the CVT algorithm
131 : * @dev: drm device
132 : * @hdisplay: hdisplay size
133 : * @vdisplay: vdisplay size
134 : * @vrefresh: vrefresh rate
135 : * @reduced: whether to use reduced blanking
136 : * @interlaced: whether to compute an interlaced mode
137 : * @margins: whether to add margins (borders)
138 : *
139 : * This function is called to generate the modeline based on CVT algorithm
140 : * according to the hdisplay, vdisplay, vrefresh.
141 : * It is based from the VESA(TM) Coordinated Video Timing Generator by
142 : * Graham Loveridge April 9, 2003 available at
143 : * http://www.elo.utfsm.cl/~elo212/docs/CVTd6r1.xls
144 : *
145 : * And it is copied from xf86CVTmode in xserver/hw/xfree86/modes/xf86cvt.c.
146 : * What I have done is to translate it by using integer calculation.
147 : *
148 : * Returns:
149 : * The modeline based on the CVT algorithm stored in a drm_display_mode object.
150 : * The display mode object is allocated with drm_mode_create(). Returns NULL
151 : * when no mode could be allocated.
152 : */
153 0 : struct drm_display_mode *drm_cvt_mode(struct drm_device *dev, int hdisplay,
154 : int vdisplay, int vrefresh,
155 : bool reduced, bool interlaced, bool margins)
156 : {
157 : #define HV_FACTOR 1000
158 : /* 1) top/bottom margin size (% of height) - default: 1.8, */
159 : #define CVT_MARGIN_PERCENTAGE 18
160 : /* 2) character cell horizontal granularity (pixels) - default 8 */
161 : #define CVT_H_GRANULARITY 8
162 : /* 3) Minimum vertical porch (lines) - default 3 */
163 : #define CVT_MIN_V_PORCH 3
164 : /* 4) Minimum number of vertical back porch lines - default 6 */
165 : #define CVT_MIN_V_BPORCH 6
166 : /* Pixel Clock step (kHz) */
167 : #define CVT_CLOCK_STEP 250
168 : struct drm_display_mode *drm_mode;
169 : unsigned int vfieldrate, hperiod;
170 : int hdisplay_rnd, hmargin, vdisplay_rnd, vmargin, vsync;
171 : int interlace;
172 :
173 : /* allocate the drm_display_mode structure. If failure, we will
174 : * return directly
175 : */
176 0 : drm_mode = drm_mode_create(dev);
177 0 : if (!drm_mode)
178 0 : return NULL;
179 :
180 : /* the CVT default refresh rate is 60Hz */
181 0 : if (!vrefresh)
182 0 : vrefresh = 60;
183 :
184 : /* the required field fresh rate */
185 0 : if (interlaced)
186 0 : vfieldrate = vrefresh * 2;
187 : else
188 : vfieldrate = vrefresh;
189 :
190 : /* horizontal pixels */
191 0 : hdisplay_rnd = hdisplay - (hdisplay % CVT_H_GRANULARITY);
192 :
193 : /* determine the left&right borders */
194 : hmargin = 0;
195 0 : if (margins) {
196 0 : hmargin = hdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000;
197 0 : hmargin -= hmargin % CVT_H_GRANULARITY;
198 0 : }
199 : /* find the total active pixels */
200 0 : drm_mode->hdisplay = hdisplay_rnd + 2 * hmargin;
201 :
202 : /* find the number of lines per field */
203 0 : if (interlaced)
204 0 : vdisplay_rnd = vdisplay / 2;
205 : else
206 : vdisplay_rnd = vdisplay;
207 :
208 : /* find the top & bottom borders */
209 : vmargin = 0;
210 0 : if (margins)
211 0 : vmargin = vdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000;
212 :
213 0 : drm_mode->vdisplay = vdisplay + 2 * vmargin;
214 :
215 : /* Interlaced */
216 0 : if (interlaced)
217 0 : interlace = 1;
218 : else
219 : interlace = 0;
220 :
221 : /* Determine VSync Width from aspect ratio */
222 0 : if (!(vdisplay % 3) && ((vdisplay * 4 / 3) == hdisplay))
223 0 : vsync = 4;
224 0 : else if (!(vdisplay % 9) && ((vdisplay * 16 / 9) == hdisplay))
225 0 : vsync = 5;
226 0 : else if (!(vdisplay % 10) && ((vdisplay * 16 / 10) == hdisplay))
227 0 : vsync = 6;
228 0 : else if (!(vdisplay % 4) && ((vdisplay * 5 / 4) == hdisplay))
229 0 : vsync = 7;
230 0 : else if (!(vdisplay % 9) && ((vdisplay * 15 / 9) == hdisplay))
231 0 : vsync = 7;
232 : else /* custom */
233 : vsync = 10;
234 :
235 0 : if (!reduced) {
236 : /* simplify the GTF calculation */
237 : /* 4) Minimum time of vertical sync + back porch interval (µs)
238 : * default 550.0
239 : */
240 : int tmp1, tmp2;
241 : #define CVT_MIN_VSYNC_BP 550
242 : /* 3) Nominal HSync width (% of line period) - default 8 */
243 : #define CVT_HSYNC_PERCENTAGE 8
244 : unsigned int hblank_percentage;
245 : int vsyncandback_porch, vback_porch, hblank;
246 :
247 : /* estimated the horizontal period */
248 0 : tmp1 = HV_FACTOR * 1000000 -
249 0 : CVT_MIN_VSYNC_BP * HV_FACTOR * vfieldrate;
250 0 : tmp2 = (vdisplay_rnd + 2 * vmargin + CVT_MIN_V_PORCH) * 2 +
251 : interlace;
252 0 : hperiod = tmp1 * 2 / (tmp2 * vfieldrate);
253 :
254 0 : tmp1 = CVT_MIN_VSYNC_BP * HV_FACTOR / hperiod + 1;
255 : /* 9. Find number of lines in sync + backporch */
256 0 : if (tmp1 < (vsync + CVT_MIN_V_PORCH))
257 0 : vsyncandback_porch = vsync + CVT_MIN_V_PORCH;
258 : else
259 : vsyncandback_porch = tmp1;
260 : /* 10. Find number of lines in back porch */
261 : vback_porch = vsyncandback_porch - vsync;
262 0 : drm_mode->vtotal = vdisplay_rnd + 2 * vmargin +
263 0 : vsyncandback_porch + CVT_MIN_V_PORCH;
264 : /* 5) Definition of Horizontal blanking time limitation */
265 : /* Gradient (%/kHz) - default 600 */
266 : #define CVT_M_FACTOR 600
267 : /* Offset (%) - default 40 */
268 : #define CVT_C_FACTOR 40
269 : /* Blanking time scaling factor - default 128 */
270 : #define CVT_K_FACTOR 128
271 : /* Scaling factor weighting - default 20 */
272 : #define CVT_J_FACTOR 20
273 : #define CVT_M_PRIME (CVT_M_FACTOR * CVT_K_FACTOR / 256)
274 : #define CVT_C_PRIME ((CVT_C_FACTOR - CVT_J_FACTOR) * CVT_K_FACTOR / 256 + \
275 : CVT_J_FACTOR)
276 : /* 12. Find ideal blanking duty cycle from formula */
277 0 : hblank_percentage = CVT_C_PRIME * HV_FACTOR - CVT_M_PRIME *
278 0 : hperiod / 1000;
279 : /* 13. Blanking time */
280 0 : if (hblank_percentage < 20 * HV_FACTOR)
281 : hblank_percentage = 20 * HV_FACTOR;
282 0 : hblank = drm_mode->hdisplay * hblank_percentage /
283 0 : (100 * HV_FACTOR - hblank_percentage);
284 0 : hblank -= hblank % (2 * CVT_H_GRANULARITY);
285 : /* 14. find the total pixels per line */
286 0 : drm_mode->htotal = drm_mode->hdisplay + hblank;
287 0 : drm_mode->hsync_end = drm_mode->hdisplay + hblank / 2;
288 0 : drm_mode->hsync_start = drm_mode->hsync_end -
289 0 : (drm_mode->htotal * CVT_HSYNC_PERCENTAGE) / 100;
290 0 : drm_mode->hsync_start += CVT_H_GRANULARITY -
291 0 : drm_mode->hsync_start % CVT_H_GRANULARITY;
292 : /* fill the Vsync values */
293 0 : drm_mode->vsync_start = drm_mode->vdisplay + CVT_MIN_V_PORCH;
294 0 : drm_mode->vsync_end = drm_mode->vsync_start + vsync;
295 0 : } else {
296 : /* Reduced blanking */
297 : /* Minimum vertical blanking interval time (µs)- default 460 */
298 : #define CVT_RB_MIN_VBLANK 460
299 : /* Fixed number of clocks for horizontal sync */
300 : #define CVT_RB_H_SYNC 32
301 : /* Fixed number of clocks for horizontal blanking */
302 : #define CVT_RB_H_BLANK 160
303 : /* Fixed number of lines for vertical front porch - default 3*/
304 : #define CVT_RB_VFPORCH 3
305 : int vbilines;
306 : int tmp1, tmp2;
307 : /* 8. Estimate Horizontal period. */
308 0 : tmp1 = HV_FACTOR * 1000000 -
309 0 : CVT_RB_MIN_VBLANK * HV_FACTOR * vfieldrate;
310 0 : tmp2 = vdisplay_rnd + 2 * vmargin;
311 0 : hperiod = tmp1 / (tmp2 * vfieldrate);
312 : /* 9. Find number of lines in vertical blanking */
313 0 : vbilines = CVT_RB_MIN_VBLANK * HV_FACTOR / hperiod + 1;
314 : /* 10. Check if vertical blanking is sufficient */
315 0 : if (vbilines < (CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH))
316 0 : vbilines = CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH;
317 : /* 11. Find total number of lines in vertical field */
318 0 : drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + vbilines;
319 : /* 12. Find total number of pixels in a line */
320 0 : drm_mode->htotal = drm_mode->hdisplay + CVT_RB_H_BLANK;
321 : /* Fill in HSync values */
322 0 : drm_mode->hsync_end = drm_mode->hdisplay + CVT_RB_H_BLANK / 2;
323 0 : drm_mode->hsync_start = drm_mode->hsync_end - CVT_RB_H_SYNC;
324 : /* Fill in VSync values */
325 0 : drm_mode->vsync_start = drm_mode->vdisplay + CVT_RB_VFPORCH;
326 0 : drm_mode->vsync_end = drm_mode->vsync_start + vsync;
327 : }
328 : /* 15/13. Find pixel clock frequency (kHz for xf86) */
329 0 : drm_mode->clock = drm_mode->htotal * HV_FACTOR * 1000 / hperiod;
330 0 : drm_mode->clock -= drm_mode->clock % CVT_CLOCK_STEP;
331 : /* 18/16. Find actual vertical frame frequency */
332 : /* ignore - just set the mode flag for interlaced */
333 0 : if (interlaced) {
334 0 : drm_mode->vtotal *= 2;
335 0 : drm_mode->flags |= DRM_MODE_FLAG_INTERLACE;
336 0 : }
337 : /* Fill the mode line name */
338 0 : drm_mode_set_name(drm_mode);
339 0 : if (reduced)
340 0 : drm_mode->flags |= (DRM_MODE_FLAG_PHSYNC |
341 : DRM_MODE_FLAG_NVSYNC);
342 : else
343 0 : drm_mode->flags |= (DRM_MODE_FLAG_PVSYNC |
344 : DRM_MODE_FLAG_NHSYNC);
345 :
346 0 : return drm_mode;
347 0 : }
348 : EXPORT_SYMBOL(drm_cvt_mode);
349 :
350 : /**
351 : * drm_gtf_mode_complex - create the modeline based on the full GTF algorithm
352 : * @dev: drm device
353 : * @hdisplay: hdisplay size
354 : * @vdisplay: vdisplay size
355 : * @vrefresh: vrefresh rate.
356 : * @interlaced: whether to compute an interlaced mode
357 : * @margins: desired margin (borders) size
358 : * @GTF_M: extended GTF formula parameters
359 : * @GTF_2C: extended GTF formula parameters
360 : * @GTF_K: extended GTF formula parameters
361 : * @GTF_2J: extended GTF formula parameters
362 : *
363 : * GTF feature blocks specify C and J in multiples of 0.5, so we pass them
364 : * in here multiplied by two. For a C of 40, pass in 80.
365 : *
366 : * Returns:
367 : * The modeline based on the full GTF algorithm stored in a drm_display_mode object.
368 : * The display mode object is allocated with drm_mode_create(). Returns NULL
369 : * when no mode could be allocated.
370 : */
371 : struct drm_display_mode *
372 0 : drm_gtf_mode_complex(struct drm_device *dev, int hdisplay, int vdisplay,
373 : int vrefresh, bool interlaced, int margins,
374 : int GTF_M, int GTF_2C, int GTF_K, int GTF_2J)
375 : { /* 1) top/bottom margin size (% of height) - default: 1.8, */
376 : #define GTF_MARGIN_PERCENTAGE 18
377 : /* 2) character cell horizontal granularity (pixels) - default 8 */
378 : #define GTF_CELL_GRAN 8
379 : /* 3) Minimum vertical porch (lines) - default 3 */
380 : #define GTF_MIN_V_PORCH 1
381 : /* width of vsync in lines */
382 : #define V_SYNC_RQD 3
383 : /* width of hsync as % of total line */
384 : #define H_SYNC_PERCENT 8
385 : /* min time of vsync + back porch (microsec) */
386 : #define MIN_VSYNC_PLUS_BP 550
387 : /* C' and M' are part of the Blanking Duty Cycle computation */
388 : #define GTF_C_PRIME ((((GTF_2C - GTF_2J) * GTF_K / 256) + GTF_2J) / 2)
389 : #define GTF_M_PRIME (GTF_K * GTF_M / 256)
390 : struct drm_display_mode *drm_mode;
391 : unsigned int hdisplay_rnd, vdisplay_rnd, vfieldrate_rqd;
392 : int top_margin, bottom_margin;
393 : int interlace;
394 : unsigned int hfreq_est;
395 : int vsync_plus_bp, vback_porch;
396 : unsigned int vtotal_lines, vfieldrate_est, hperiod;
397 : unsigned int vfield_rate, vframe_rate;
398 : int left_margin, right_margin;
399 : unsigned int total_active_pixels, ideal_duty_cycle;
400 : unsigned int hblank, total_pixels, pixel_freq;
401 : int hsync, hfront_porch, vodd_front_porch_lines;
402 : unsigned int tmp1, tmp2;
403 :
404 0 : drm_mode = drm_mode_create(dev);
405 0 : if (!drm_mode)
406 0 : return NULL;
407 :
408 : /* 1. In order to give correct results, the number of horizontal
409 : * pixels requested is first processed to ensure that it is divisible
410 : * by the character size, by rounding it to the nearest character
411 : * cell boundary:
412 : */
413 0 : hdisplay_rnd = (hdisplay + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN;
414 0 : hdisplay_rnd = hdisplay_rnd * GTF_CELL_GRAN;
415 :
416 : /* 2. If interlace is requested, the number of vertical lines assumed
417 : * by the calculation must be halved, as the computation calculates
418 : * the number of vertical lines per field.
419 : */
420 0 : if (interlaced)
421 0 : vdisplay_rnd = vdisplay / 2;
422 : else
423 : vdisplay_rnd = vdisplay;
424 :
425 : /* 3. Find the frame rate required: */
426 0 : if (interlaced)
427 0 : vfieldrate_rqd = vrefresh * 2;
428 : else
429 : vfieldrate_rqd = vrefresh;
430 :
431 : /* 4. Find number of lines in Top margin: */
432 : top_margin = 0;
433 0 : if (margins)
434 0 : top_margin = (vdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) /
435 : 1000;
436 : /* 5. Find number of lines in bottom margin: */
437 : bottom_margin = top_margin;
438 :
439 : /* 6. If interlace is required, then set variable interlace: */
440 0 : if (interlaced)
441 0 : interlace = 1;
442 : else
443 : interlace = 0;
444 :
445 : /* 7. Estimate the Horizontal frequency */
446 : {
447 0 : tmp1 = (1000000 - MIN_VSYNC_PLUS_BP * vfieldrate_rqd) / 500;
448 0 : tmp2 = (vdisplay_rnd + 2 * top_margin + GTF_MIN_V_PORCH) *
449 0 : 2 + interlace;
450 0 : hfreq_est = (tmp2 * 1000 * vfieldrate_rqd) / tmp1;
451 : }
452 :
453 : /* 8. Find the number of lines in V sync + back porch */
454 : /* [V SYNC+BP] = RINT(([MIN VSYNC+BP] * hfreq_est / 1000000)) */
455 0 : vsync_plus_bp = MIN_VSYNC_PLUS_BP * hfreq_est / 1000;
456 0 : vsync_plus_bp = (vsync_plus_bp + 500) / 1000;
457 : /* 9. Find the number of lines in V back porch alone: */
458 : vback_porch = vsync_plus_bp - V_SYNC_RQD;
459 : /* 10. Find the total number of lines in Vertical field period: */
460 0 : vtotal_lines = vdisplay_rnd + top_margin + bottom_margin +
461 0 : vsync_plus_bp + GTF_MIN_V_PORCH;
462 : /* 11. Estimate the Vertical field frequency: */
463 : vfieldrate_est = hfreq_est / vtotal_lines;
464 : /* 12. Find the actual horizontal period: */
465 0 : hperiod = 1000000 / (vfieldrate_rqd * vtotal_lines);
466 :
467 : /* 13. Find the actual Vertical field frequency: */
468 0 : vfield_rate = hfreq_est / vtotal_lines;
469 : /* 14. Find the Vertical frame frequency: */
470 0 : if (interlaced)
471 0 : vframe_rate = vfield_rate / 2;
472 : else
473 : vframe_rate = vfield_rate;
474 : /* 15. Find number of pixels in left margin: */
475 0 : if (margins)
476 0 : left_margin = (hdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) /
477 : 1000;
478 : else
479 : left_margin = 0;
480 :
481 : /* 16.Find number of pixels in right margin: */
482 : right_margin = left_margin;
483 : /* 17.Find total number of active pixels in image and left and right */
484 0 : total_active_pixels = hdisplay_rnd + left_margin + right_margin;
485 : /* 18.Find the ideal blanking duty cycle from blanking duty cycle */
486 0 : ideal_duty_cycle = GTF_C_PRIME * 1000 -
487 0 : (GTF_M_PRIME * 1000000 / hfreq_est);
488 : /* 19.Find the number of pixels in the blanking time to the nearest
489 : * double character cell: */
490 0 : hblank = total_active_pixels * ideal_duty_cycle /
491 0 : (100000 - ideal_duty_cycle);
492 0 : hblank = (hblank + GTF_CELL_GRAN) / (2 * GTF_CELL_GRAN);
493 0 : hblank = hblank * 2 * GTF_CELL_GRAN;
494 : /* 20.Find total number of pixels: */
495 0 : total_pixels = total_active_pixels + hblank;
496 : /* 21.Find pixel clock frequency: */
497 0 : pixel_freq = total_pixels * hfreq_est / 1000;
498 : /* Stage 1 computations are now complete; I should really pass
499 : * the results to another function and do the Stage 2 computations,
500 : * but I only need a few more values so I'll just append the
501 : * computations here for now */
502 : /* 17. Find the number of pixels in the horizontal sync period: */
503 0 : hsync = H_SYNC_PERCENT * total_pixels / 100;
504 0 : hsync = (hsync + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN;
505 0 : hsync = hsync * GTF_CELL_GRAN;
506 : /* 18. Find the number of pixels in horizontal front porch period */
507 0 : hfront_porch = hblank / 2 - hsync;
508 : /* 36. Find the number of lines in the odd front porch period: */
509 : vodd_front_porch_lines = GTF_MIN_V_PORCH ;
510 :
511 : /* finally, pack the results in the mode struct */
512 0 : drm_mode->hdisplay = hdisplay_rnd;
513 0 : drm_mode->hsync_start = hdisplay_rnd + hfront_porch;
514 0 : drm_mode->hsync_end = drm_mode->hsync_start + hsync;
515 0 : drm_mode->htotal = total_pixels;
516 0 : drm_mode->vdisplay = vdisplay_rnd;
517 0 : drm_mode->vsync_start = vdisplay_rnd + vodd_front_porch_lines;
518 0 : drm_mode->vsync_end = drm_mode->vsync_start + V_SYNC_RQD;
519 0 : drm_mode->vtotal = vtotal_lines;
520 :
521 0 : drm_mode->clock = pixel_freq;
522 :
523 0 : if (interlaced) {
524 0 : drm_mode->vtotal *= 2;
525 0 : drm_mode->flags |= DRM_MODE_FLAG_INTERLACE;
526 0 : }
527 :
528 0 : drm_mode_set_name(drm_mode);
529 0 : if (GTF_M == 600 && GTF_2C == 80 && GTF_K == 128 && GTF_2J == 40)
530 0 : drm_mode->flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC;
531 : else
532 0 : drm_mode->flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC;
533 :
534 0 : return drm_mode;
535 0 : }
536 : EXPORT_SYMBOL(drm_gtf_mode_complex);
537 :
538 : /**
539 : * drm_gtf_mode - create the modeline based on the GTF algorithm
540 : * @dev: drm device
541 : * @hdisplay: hdisplay size
542 : * @vdisplay: vdisplay size
543 : * @vrefresh: vrefresh rate.
544 : * @interlaced: whether to compute an interlaced mode
545 : * @margins: desired margin (borders) size
546 : *
547 : * return the modeline based on GTF algorithm
548 : *
549 : * This function is to create the modeline based on the GTF algorithm.
550 : * Generalized Timing Formula is derived from:
551 : * GTF Spreadsheet by Andy Morrish (1/5/97)
552 : * available at http://www.vesa.org
553 : *
554 : * And it is copied from the file of xserver/hw/xfree86/modes/xf86gtf.c.
555 : * What I have done is to translate it by using integer calculation.
556 : * I also refer to the function of fb_get_mode in the file of
557 : * drivers/video/fbmon.c
558 : *
559 : * Standard GTF parameters:
560 : * M = 600
561 : * C = 40
562 : * K = 128
563 : * J = 20
564 : *
565 : * Returns:
566 : * The modeline based on the GTF algorithm stored in a drm_display_mode object.
567 : * The display mode object is allocated with drm_mode_create(). Returns NULL
568 : * when no mode could be allocated.
569 : */
570 : struct drm_display_mode *
571 0 : drm_gtf_mode(struct drm_device *dev, int hdisplay, int vdisplay, int vrefresh,
572 : bool interlaced, int margins)
573 : {
574 0 : return drm_gtf_mode_complex(dev, hdisplay, vdisplay, vrefresh,
575 : interlaced, margins,
576 : 600, 40 * 2, 128, 20 * 2);
577 : }
578 : EXPORT_SYMBOL(drm_gtf_mode);
579 :
580 : #ifdef CONFIG_VIDEOMODE_HELPERS
581 : /**
582 : * drm_display_mode_from_videomode - fill in @dmode using @vm,
583 : * @vm: videomode structure to use as source
584 : * @dmode: drm_display_mode structure to use as destination
585 : *
586 : * Fills out @dmode using the display mode specified in @vm.
587 : */
588 : void drm_display_mode_from_videomode(const struct videomode *vm,
589 : struct drm_display_mode *dmode)
590 : {
591 : dmode->hdisplay = vm->hactive;
592 : dmode->hsync_start = dmode->hdisplay + vm->hfront_porch;
593 : dmode->hsync_end = dmode->hsync_start + vm->hsync_len;
594 : dmode->htotal = dmode->hsync_end + vm->hback_porch;
595 :
596 : dmode->vdisplay = vm->vactive;
597 : dmode->vsync_start = dmode->vdisplay + vm->vfront_porch;
598 : dmode->vsync_end = dmode->vsync_start + vm->vsync_len;
599 : dmode->vtotal = dmode->vsync_end + vm->vback_porch;
600 :
601 : dmode->clock = vm->pixelclock / 1000;
602 :
603 : dmode->flags = 0;
604 : if (vm->flags & DISPLAY_FLAGS_HSYNC_HIGH)
605 : dmode->flags |= DRM_MODE_FLAG_PHSYNC;
606 : else if (vm->flags & DISPLAY_FLAGS_HSYNC_LOW)
607 : dmode->flags |= DRM_MODE_FLAG_NHSYNC;
608 : if (vm->flags & DISPLAY_FLAGS_VSYNC_HIGH)
609 : dmode->flags |= DRM_MODE_FLAG_PVSYNC;
610 : else if (vm->flags & DISPLAY_FLAGS_VSYNC_LOW)
611 : dmode->flags |= DRM_MODE_FLAG_NVSYNC;
612 : if (vm->flags & DISPLAY_FLAGS_INTERLACED)
613 : dmode->flags |= DRM_MODE_FLAG_INTERLACE;
614 : if (vm->flags & DISPLAY_FLAGS_DOUBLESCAN)
615 : dmode->flags |= DRM_MODE_FLAG_DBLSCAN;
616 : if (vm->flags & DISPLAY_FLAGS_DOUBLECLK)
617 : dmode->flags |= DRM_MODE_FLAG_DBLCLK;
618 : drm_mode_set_name(dmode);
619 : }
620 : EXPORT_SYMBOL_GPL(drm_display_mode_from_videomode);
621 :
622 : /**
623 : * drm_display_mode_to_videomode - fill in @vm using @dmode,
624 : * @dmode: drm_display_mode structure to use as source
625 : * @vm: videomode structure to use as destination
626 : *
627 : * Fills out @vm using the display mode specified in @dmode.
628 : */
629 : void drm_display_mode_to_videomode(const struct drm_display_mode *dmode,
630 : struct videomode *vm)
631 : {
632 : vm->hactive = dmode->hdisplay;
633 : vm->hfront_porch = dmode->hsync_start - dmode->hdisplay;
634 : vm->hsync_len = dmode->hsync_end - dmode->hsync_start;
635 : vm->hback_porch = dmode->htotal - dmode->hsync_end;
636 :
637 : vm->vactive = dmode->vdisplay;
638 : vm->vfront_porch = dmode->vsync_start - dmode->vdisplay;
639 : vm->vsync_len = dmode->vsync_end - dmode->vsync_start;
640 : vm->vback_porch = dmode->vtotal - dmode->vsync_end;
641 :
642 : vm->pixelclock = dmode->clock * 1000;
643 :
644 : vm->flags = 0;
645 : if (dmode->flags & DRM_MODE_FLAG_PHSYNC)
646 : vm->flags |= DISPLAY_FLAGS_HSYNC_HIGH;
647 : else if (dmode->flags & DRM_MODE_FLAG_NHSYNC)
648 : vm->flags |= DISPLAY_FLAGS_HSYNC_LOW;
649 : if (dmode->flags & DRM_MODE_FLAG_PVSYNC)
650 : vm->flags |= DISPLAY_FLAGS_VSYNC_HIGH;
651 : else if (dmode->flags & DRM_MODE_FLAG_NVSYNC)
652 : vm->flags |= DISPLAY_FLAGS_VSYNC_LOW;
653 : if (dmode->flags & DRM_MODE_FLAG_INTERLACE)
654 : vm->flags |= DISPLAY_FLAGS_INTERLACED;
655 : if (dmode->flags & DRM_MODE_FLAG_DBLSCAN)
656 : vm->flags |= DISPLAY_FLAGS_DOUBLESCAN;
657 : if (dmode->flags & DRM_MODE_FLAG_DBLCLK)
658 : vm->flags |= DISPLAY_FLAGS_DOUBLECLK;
659 : }
660 : EXPORT_SYMBOL_GPL(drm_display_mode_to_videomode);
661 :
662 : #ifdef CONFIG_OF
663 : /**
664 : * of_get_drm_display_mode - get a drm_display_mode from devicetree
665 : * @np: device_node with the timing specification
666 : * @dmode: will be set to the return value
667 : * @index: index into the list of display timings in devicetree
668 : *
669 : * This function is expensive and should only be used, if only one mode is to be
670 : * read from DT. To get multiple modes start with of_get_display_timings and
671 : * work with that instead.
672 : *
673 : * Returns:
674 : * 0 on success, a negative errno code when no of videomode node was found.
675 : */
676 : int of_get_drm_display_mode(struct device_node *np,
677 : struct drm_display_mode *dmode, int index)
678 : {
679 : struct videomode vm;
680 : int ret;
681 :
682 : ret = of_get_videomode(np, &vm, index);
683 : if (ret)
684 : return ret;
685 :
686 : drm_display_mode_from_videomode(&vm, dmode);
687 :
688 : pr_debug("%s: got %dx%d display mode from %s\n",
689 : of_node_full_name(np), vm.hactive, vm.vactive, np->name);
690 : drm_mode_debug_printmodeline(dmode);
691 :
692 : return 0;
693 : }
694 : EXPORT_SYMBOL_GPL(of_get_drm_display_mode);
695 : #endif /* CONFIG_OF */
696 : #endif /* CONFIG_VIDEOMODE_HELPERS */
697 :
698 : /**
699 : * drm_mode_set_name - set the name on a mode
700 : * @mode: name will be set in this mode
701 : *
702 : * Set the name of @mode to a standard format which is <hdisplay>x<vdisplay>
703 : * with an optional 'i' suffix for interlaced modes.
704 : */
705 0 : void drm_mode_set_name(struct drm_display_mode *mode)
706 : {
707 0 : bool interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
708 :
709 0 : snprintf(mode->name, DRM_DISPLAY_MODE_LEN, "%dx%d%s",
710 0 : mode->hdisplay, mode->vdisplay,
711 0 : interlaced ? "i" : "");
712 0 : }
713 : EXPORT_SYMBOL(drm_mode_set_name);
714 :
715 : /** drm_mode_hsync - get the hsync of a mode
716 : * @mode: mode
717 : *
718 : * Returns:
719 : * @modes's hsync rate in kHz, rounded to the nearest integer. Calculates the
720 : * value first if it is not yet set.
721 : */
722 0 : int drm_mode_hsync(const struct drm_display_mode *mode)
723 : {
724 : unsigned int calc_val;
725 :
726 0 : if (mode->hsync)
727 0 : return mode->hsync;
728 :
729 0 : if (mode->htotal < 0)
730 0 : return 0;
731 :
732 0 : calc_val = (mode->clock * 1000) / mode->htotal; /* hsync in Hz */
733 0 : calc_val += 500; /* round to 1000Hz */
734 0 : calc_val /= 1000; /* truncate to kHz */
735 :
736 0 : return calc_val;
737 0 : }
738 : EXPORT_SYMBOL(drm_mode_hsync);
739 :
740 : /**
741 : * drm_mode_vrefresh - get the vrefresh of a mode
742 : * @mode: mode
743 : *
744 : * Returns:
745 : * @modes's vrefresh rate in Hz, rounded to the nearest integer. Calculates the
746 : * value first if it is not yet set.
747 : */
748 0 : int drm_mode_vrefresh(const struct drm_display_mode *mode)
749 : {
750 : int refresh = 0;
751 : unsigned int calc_val;
752 :
753 0 : if (mode->vrefresh > 0)
754 0 : refresh = mode->vrefresh;
755 0 : else if (mode->htotal > 0 && mode->vtotal > 0) {
756 : int vtotal;
757 : vtotal = mode->vtotal;
758 : /* work out vrefresh the value will be x1000 */
759 0 : calc_val = (mode->clock * 1000);
760 0 : calc_val /= mode->htotal;
761 0 : refresh = (calc_val + vtotal / 2) / vtotal;
762 :
763 0 : if (mode->flags & DRM_MODE_FLAG_INTERLACE)
764 0 : refresh *= 2;
765 0 : if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
766 0 : refresh /= 2;
767 0 : if (mode->vscan > 1)
768 0 : refresh /= mode->vscan;
769 0 : }
770 0 : return refresh;
771 : }
772 : EXPORT_SYMBOL(drm_mode_vrefresh);
773 :
774 : /**
775 : * drm_mode_set_crtcinfo - set CRTC modesetting timing parameters
776 : * @p: mode
777 : * @adjust_flags: a combination of adjustment flags
778 : *
779 : * Setup the CRTC modesetting timing parameters for @p, adjusting if necessary.
780 : *
781 : * - The CRTC_INTERLACE_HALVE_V flag can be used to halve vertical timings of
782 : * interlaced modes.
783 : * - The CRTC_STEREO_DOUBLE flag can be used to compute the timings for
784 : * buffers containing two eyes (only adjust the timings when needed, eg. for
785 : * "frame packing" or "side by side full").
786 : * - The CRTC_NO_DBLSCAN and CRTC_NO_VSCAN flags request that adjustment *not*
787 : * be performed for doublescan and vscan > 1 modes respectively.
788 : */
789 0 : void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags)
790 : {
791 0 : if ((p == NULL) || ((p->type & DRM_MODE_TYPE_CRTC_C) == DRM_MODE_TYPE_BUILTIN))
792 : return;
793 :
794 0 : p->crtc_clock = p->clock;
795 0 : p->crtc_hdisplay = p->hdisplay;
796 0 : p->crtc_hsync_start = p->hsync_start;
797 0 : p->crtc_hsync_end = p->hsync_end;
798 0 : p->crtc_htotal = p->htotal;
799 0 : p->crtc_hskew = p->hskew;
800 0 : p->crtc_vdisplay = p->vdisplay;
801 0 : p->crtc_vsync_start = p->vsync_start;
802 0 : p->crtc_vsync_end = p->vsync_end;
803 0 : p->crtc_vtotal = p->vtotal;
804 :
805 0 : if (p->flags & DRM_MODE_FLAG_INTERLACE) {
806 0 : if (adjust_flags & CRTC_INTERLACE_HALVE_V) {
807 0 : p->crtc_vdisplay /= 2;
808 0 : p->crtc_vsync_start /= 2;
809 0 : p->crtc_vsync_end /= 2;
810 0 : p->crtc_vtotal /= 2;
811 0 : }
812 : }
813 :
814 0 : if (!(adjust_flags & CRTC_NO_DBLSCAN)) {
815 0 : if (p->flags & DRM_MODE_FLAG_DBLSCAN) {
816 0 : p->crtc_vdisplay *= 2;
817 0 : p->crtc_vsync_start *= 2;
818 0 : p->crtc_vsync_end *= 2;
819 0 : p->crtc_vtotal *= 2;
820 0 : }
821 : }
822 :
823 0 : if (!(adjust_flags & CRTC_NO_VSCAN)) {
824 0 : if (p->vscan > 1) {
825 0 : p->crtc_vdisplay *= p->vscan;
826 0 : p->crtc_vsync_start *= p->vscan;
827 0 : p->crtc_vsync_end *= p->vscan;
828 0 : p->crtc_vtotal *= p->vscan;
829 0 : }
830 : }
831 :
832 0 : if (adjust_flags & CRTC_STEREO_DOUBLE) {
833 0 : unsigned int layout = p->flags & DRM_MODE_FLAG_3D_MASK;
834 :
835 0 : switch (layout) {
836 : case DRM_MODE_FLAG_3D_FRAME_PACKING:
837 0 : p->crtc_clock *= 2;
838 0 : p->crtc_vdisplay += p->crtc_vtotal;
839 0 : p->crtc_vsync_start += p->crtc_vtotal;
840 0 : p->crtc_vsync_end += p->crtc_vtotal;
841 0 : p->crtc_vtotal += p->crtc_vtotal;
842 0 : break;
843 : }
844 0 : }
845 :
846 0 : p->crtc_vblank_start = min(p->crtc_vsync_start, p->crtc_vdisplay);
847 0 : p->crtc_vblank_end = max(p->crtc_vsync_end, p->crtc_vtotal);
848 0 : p->crtc_hblank_start = min(p->crtc_hsync_start, p->crtc_hdisplay);
849 0 : p->crtc_hblank_end = max(p->crtc_hsync_end, p->crtc_htotal);
850 0 : }
851 : EXPORT_SYMBOL(drm_mode_set_crtcinfo);
852 :
853 : /**
854 : * drm_mode_copy - copy the mode
855 : * @dst: mode to overwrite
856 : * @src: mode to copy
857 : *
858 : * Copy an existing mode into another mode, preserving the object id and
859 : * list head of the destination mode.
860 : */
861 0 : void drm_mode_copy(struct drm_display_mode *dst, const struct drm_display_mode *src)
862 : {
863 0 : int id = dst->base.id;
864 0 : struct list_head head = dst->head;
865 :
866 0 : *dst = *src;
867 0 : dst->base.id = id;
868 0 : dst->head = head;
869 0 : }
870 : EXPORT_SYMBOL(drm_mode_copy);
871 :
872 : /**
873 : * drm_mode_duplicate - allocate and duplicate an existing mode
874 : * @dev: drm_device to allocate the duplicated mode for
875 : * @mode: mode to duplicate
876 : *
877 : * Just allocate a new mode, copy the existing mode into it, and return
878 : * a pointer to it. Used to create new instances of established modes.
879 : *
880 : * Returns:
881 : * Pointer to duplicated mode on success, NULL on error.
882 : */
883 0 : struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev,
884 : const struct drm_display_mode *mode)
885 : {
886 : struct drm_display_mode *nmode;
887 :
888 0 : nmode = drm_mode_create(dev);
889 0 : if (!nmode)
890 0 : return NULL;
891 :
892 0 : drm_mode_copy(nmode, mode);
893 :
894 0 : return nmode;
895 0 : }
896 : EXPORT_SYMBOL(drm_mode_duplicate);
897 :
898 : /**
899 : * drm_mode_equal - test modes for equality
900 : * @mode1: first mode
901 : * @mode2: second mode
902 : *
903 : * Check to see if @mode1 and @mode2 are equivalent.
904 : *
905 : * Returns:
906 : * True if the modes are equal, false otherwise.
907 : */
908 0 : bool drm_mode_equal(const struct drm_display_mode *mode1, const struct drm_display_mode *mode2)
909 : {
910 0 : if (!mode1 && !mode2)
911 0 : return true;
912 :
913 0 : if (!mode1 || !mode2)
914 0 : return false;
915 :
916 : /* do clock check convert to PICOS so fb modes get matched
917 : * the same */
918 0 : if (mode1->clock && mode2->clock) {
919 0 : if (KHZ2PICOS(mode1->clock) != KHZ2PICOS(mode2->clock))
920 0 : return false;
921 0 : } else if (mode1->clock != mode2->clock)
922 0 : return false;
923 :
924 0 : if ((mode1->flags & DRM_MODE_FLAG_3D_MASK) !=
925 0 : (mode2->flags & DRM_MODE_FLAG_3D_MASK))
926 0 : return false;
927 :
928 0 : return drm_mode_equal_no_clocks_no_stereo(mode1, mode2);
929 0 : }
930 : EXPORT_SYMBOL(drm_mode_equal);
931 :
932 : /**
933 : * drm_mode_equal_no_clocks_no_stereo - test modes for equality
934 : * @mode1: first mode
935 : * @mode2: second mode
936 : *
937 : * Check to see if @mode1 and @mode2 are equivalent, but
938 : * don't check the pixel clocks nor the stereo layout.
939 : *
940 : * Returns:
941 : * True if the modes are equal, false otherwise.
942 : */
943 0 : bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1,
944 : const struct drm_display_mode *mode2)
945 : {
946 0 : if (mode1->hdisplay == mode2->hdisplay &&
947 0 : mode1->hsync_start == mode2->hsync_start &&
948 0 : mode1->hsync_end == mode2->hsync_end &&
949 0 : mode1->htotal == mode2->htotal &&
950 0 : mode1->hskew == mode2->hskew &&
951 0 : mode1->vdisplay == mode2->vdisplay &&
952 0 : mode1->vsync_start == mode2->vsync_start &&
953 0 : mode1->vsync_end == mode2->vsync_end &&
954 0 : mode1->vtotal == mode2->vtotal &&
955 0 : mode1->vscan == mode2->vscan &&
956 0 : (mode1->flags & ~DRM_MODE_FLAG_3D_MASK) ==
957 0 : (mode2->flags & ~DRM_MODE_FLAG_3D_MASK))
958 0 : return true;
959 :
960 0 : return false;
961 0 : }
962 : EXPORT_SYMBOL(drm_mode_equal_no_clocks_no_stereo);
963 :
964 : /**
965 : * drm_mode_validate_basic - make sure the mode is somewhat sane
966 : * @mode: mode to check
967 : *
968 : * Check that the mode timings are at least somewhat reasonable.
969 : * Any hardware specific limits are left up for each driver to check.
970 : *
971 : * Returns:
972 : * The mode status
973 : */
974 : enum drm_mode_status
975 0 : drm_mode_validate_basic(const struct drm_display_mode *mode)
976 : {
977 0 : if (mode->clock == 0)
978 0 : return MODE_CLOCK_LOW;
979 :
980 0 : if (mode->hdisplay == 0 ||
981 0 : mode->hsync_start < mode->hdisplay ||
982 0 : mode->hsync_end < mode->hsync_start ||
983 0 : mode->htotal < mode->hsync_end)
984 0 : return MODE_H_ILLEGAL;
985 :
986 0 : if (mode->vdisplay == 0 ||
987 0 : mode->vsync_start < mode->vdisplay ||
988 0 : mode->vsync_end < mode->vsync_start ||
989 0 : mode->vtotal < mode->vsync_end)
990 0 : return MODE_V_ILLEGAL;
991 :
992 0 : return MODE_OK;
993 0 : }
994 : EXPORT_SYMBOL(drm_mode_validate_basic);
995 :
996 : /**
997 : * drm_mode_validate_size - make sure modes adhere to size constraints
998 : * @mode: mode to check
999 : * @maxX: maximum width
1000 : * @maxY: maximum height
1001 : *
1002 : * This function is a helper which can be used to validate modes against size
1003 : * limitations of the DRM device/connector. If a mode is too big its status
1004 : * member is updated with the appropriate validation failure code. The list
1005 : * itself is not changed.
1006 : *
1007 : * Returns:
1008 : * The mode status
1009 : */
1010 : enum drm_mode_status
1011 0 : drm_mode_validate_size(const struct drm_display_mode *mode,
1012 : int maxX, int maxY)
1013 : {
1014 0 : if (maxX > 0 && mode->hdisplay > maxX)
1015 0 : return MODE_VIRTUAL_X;
1016 :
1017 0 : if (maxY > 0 && mode->vdisplay > maxY)
1018 0 : return MODE_VIRTUAL_Y;
1019 :
1020 0 : return MODE_OK;
1021 0 : }
1022 : EXPORT_SYMBOL(drm_mode_validate_size);
1023 :
1024 : #ifdef DRMDEBUG
1025 :
1026 : #define MODE_STATUS(status) [MODE_ ## status + 3] = #status
1027 :
1028 : static const char * const drm_mode_status_names[] = {
1029 : MODE_STATUS(OK),
1030 : MODE_STATUS(HSYNC),
1031 : MODE_STATUS(VSYNC),
1032 : MODE_STATUS(H_ILLEGAL),
1033 : MODE_STATUS(V_ILLEGAL),
1034 : MODE_STATUS(BAD_WIDTH),
1035 : MODE_STATUS(NOMODE),
1036 : MODE_STATUS(NO_INTERLACE),
1037 : MODE_STATUS(NO_DBLESCAN),
1038 : MODE_STATUS(NO_VSCAN),
1039 : MODE_STATUS(MEM),
1040 : MODE_STATUS(VIRTUAL_X),
1041 : MODE_STATUS(VIRTUAL_Y),
1042 : MODE_STATUS(MEM_VIRT),
1043 : MODE_STATUS(NOCLOCK),
1044 : MODE_STATUS(CLOCK_HIGH),
1045 : MODE_STATUS(CLOCK_LOW),
1046 : MODE_STATUS(CLOCK_RANGE),
1047 : MODE_STATUS(BAD_HVALUE),
1048 : MODE_STATUS(BAD_VVALUE),
1049 : MODE_STATUS(BAD_VSCAN),
1050 : MODE_STATUS(HSYNC_NARROW),
1051 : MODE_STATUS(HSYNC_WIDE),
1052 : MODE_STATUS(HBLANK_NARROW),
1053 : MODE_STATUS(HBLANK_WIDE),
1054 : MODE_STATUS(VSYNC_NARROW),
1055 : MODE_STATUS(VSYNC_WIDE),
1056 : MODE_STATUS(VBLANK_NARROW),
1057 : MODE_STATUS(VBLANK_WIDE),
1058 : MODE_STATUS(PANEL),
1059 : MODE_STATUS(INTERLACE_WIDTH),
1060 : MODE_STATUS(ONE_WIDTH),
1061 : MODE_STATUS(ONE_HEIGHT),
1062 : MODE_STATUS(ONE_SIZE),
1063 : MODE_STATUS(NO_REDUCED),
1064 : MODE_STATUS(NO_STEREO),
1065 : MODE_STATUS(UNVERIFIED),
1066 : MODE_STATUS(BAD),
1067 : MODE_STATUS(ERROR),
1068 : };
1069 :
1070 : #undef MODE_STATUS
1071 :
1072 : static const char *drm_get_mode_status_name(enum drm_mode_status status)
1073 : {
1074 : int index = status + 3;
1075 :
1076 : if (WARN_ON(index < 0 || index >= ARRAY_SIZE(drm_mode_status_names)))
1077 : return "";
1078 :
1079 : return drm_mode_status_names[index];
1080 : }
1081 :
1082 : #endif
1083 :
1084 : /**
1085 : * drm_mode_prune_invalid - remove invalid modes from mode list
1086 : * @dev: DRM device
1087 : * @mode_list: list of modes to check
1088 : * @verbose: be verbose about it
1089 : *
1090 : * This helper function can be used to prune a display mode list after
1091 : * validation has been completed. All modes who's status is not MODE_OK will be
1092 : * removed from the list, and if @verbose the status code and mode name is also
1093 : * printed to dmesg.
1094 : */
1095 0 : void drm_mode_prune_invalid(struct drm_device *dev,
1096 : struct list_head *mode_list, bool verbose)
1097 : {
1098 : struct drm_display_mode *mode, *t;
1099 :
1100 0 : list_for_each_entry_safe(mode, t, mode_list, head) {
1101 0 : if (mode->status != MODE_OK) {
1102 0 : list_del(&mode->head);
1103 0 : if (verbose) {
1104 0 : drm_mode_debug_printmodeline(mode);
1105 : DRM_DEBUG_KMS("Not using %s mode: %s\n",
1106 : mode->name,
1107 : drm_get_mode_status_name(mode->status));
1108 0 : }
1109 0 : drm_mode_destroy(dev, mode);
1110 0 : }
1111 : }
1112 0 : }
1113 : EXPORT_SYMBOL(drm_mode_prune_invalid);
1114 :
1115 : /**
1116 : * drm_mode_compare - compare modes for favorability
1117 : * @priv: unused
1118 : * @lh_a: list_head for first mode
1119 : * @lh_b: list_head for second mode
1120 : *
1121 : * Compare two modes, given by @lh_a and @lh_b, returning a value indicating
1122 : * which is better.
1123 : *
1124 : * Returns:
1125 : * Negative if @lh_a is better than @lh_b, zero if they're equivalent, or
1126 : * positive if @lh_b is better than @lh_a.
1127 : */
1128 0 : static int drm_mode_compare(void *priv, struct list_head *lh_a, struct list_head *lh_b)
1129 : {
1130 0 : struct drm_display_mode *a = list_entry(lh_a, struct drm_display_mode, head);
1131 0 : struct drm_display_mode *b = list_entry(lh_b, struct drm_display_mode, head);
1132 : int diff;
1133 :
1134 0 : diff = ((b->type & DRM_MODE_TYPE_PREFERRED) != 0) -
1135 0 : ((a->type & DRM_MODE_TYPE_PREFERRED) != 0);
1136 0 : if (diff)
1137 0 : return diff;
1138 0 : diff = b->hdisplay * b->vdisplay - a->hdisplay * a->vdisplay;
1139 0 : if (diff)
1140 0 : return diff;
1141 :
1142 0 : diff = b->vrefresh - a->vrefresh;
1143 0 : if (diff)
1144 0 : return diff;
1145 :
1146 0 : diff = b->clock - a->clock;
1147 0 : return diff;
1148 0 : }
1149 :
1150 : /**
1151 : * drm_mode_sort - sort mode list
1152 : * @mode_list: list of drm_display_mode structures to sort
1153 : *
1154 : * Sort @mode_list by favorability, moving good modes to the head of the list.
1155 : */
1156 0 : void drm_mode_sort(struct list_head *mode_list)
1157 : {
1158 0 : list_sort(NULL, mode_list, drm_mode_compare);
1159 0 : }
1160 : EXPORT_SYMBOL(drm_mode_sort);
1161 :
1162 : /**
1163 : * drm_mode_connector_list_update - update the mode list for the connector
1164 : * @connector: the connector to update
1165 : * @merge_type_bits: whether to merge or overwrite type bits
1166 : *
1167 : * This moves the modes from the @connector probed_modes list
1168 : * to the actual mode list. It compares the probed mode against the current
1169 : * list and only adds different/new modes.
1170 : *
1171 : * This is just a helper functions doesn't validate any modes itself and also
1172 : * doesn't prune any invalid modes. Callers need to do that themselves.
1173 : */
1174 0 : void drm_mode_connector_list_update(struct drm_connector *connector,
1175 : bool merge_type_bits)
1176 : {
1177 : struct drm_display_mode *mode;
1178 : struct drm_display_mode *pmode, *pt;
1179 : int found_it;
1180 :
1181 0 : WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex));
1182 :
1183 0 : list_for_each_entry_safe(pmode, pt, &connector->probed_modes,
1184 : head) {
1185 : found_it = 0;
1186 : /* go through current modes checking for the new probed mode */
1187 0 : list_for_each_entry(mode, &connector->modes, head) {
1188 0 : if (drm_mode_equal(pmode, mode)) {
1189 : found_it = 1;
1190 : /* if equal delete the probed mode */
1191 0 : mode->status = pmode->status;
1192 : /* Merge type bits together */
1193 0 : if (merge_type_bits)
1194 0 : mode->type |= pmode->type;
1195 : else
1196 0 : mode->type = pmode->type;
1197 0 : list_del(&pmode->head);
1198 0 : drm_mode_destroy(connector->dev, pmode);
1199 0 : break;
1200 : }
1201 : }
1202 :
1203 0 : if (!found_it) {
1204 0 : list_move_tail(&pmode->head, &connector->modes);
1205 0 : }
1206 : }
1207 0 : }
1208 : EXPORT_SYMBOL(drm_mode_connector_list_update);
1209 :
1210 : /**
1211 : * drm_mode_parse_command_line_for_connector - parse command line modeline for connector
1212 : * @mode_option: optional per connector mode option
1213 : * @connector: connector to parse modeline for
1214 : * @mode: preallocated drm_cmdline_mode structure to fill out
1215 : *
1216 : * This parses @mode_option command line modeline for modes and options to
1217 : * configure the connector. If @mode_option is NULL the default command line
1218 : * modeline in fb_mode_option will be parsed instead.
1219 : *
1220 : * This uses the same parameters as the fb modedb.c, except for an extra
1221 : * force-enable, force-enable-digital and force-disable bit at the end:
1222 : *
1223 : * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd]
1224 : *
1225 : * The intermediate drm_cmdline_mode structure is required to store additional
1226 : * options from the command line modline like the force-enable/disable flag.
1227 : *
1228 : * Returns:
1229 : * True if a valid modeline has been parsed, false otherwise.
1230 : */
1231 0 : bool drm_mode_parse_command_line_for_connector(const char *mode_option,
1232 : struct drm_connector *connector,
1233 : struct drm_cmdline_mode *mode)
1234 : {
1235 : #ifdef __linux__
1236 : const char *name;
1237 : unsigned int namelen;
1238 : bool res_specified = false, bpp_specified = false, refresh_specified = false;
1239 : unsigned int xres = 0, yres = 0, bpp = 32, refresh = 0;
1240 : bool yres_specified = false, cvt = false, rb = false;
1241 : bool interlace = false, margins = false, was_digit = false;
1242 : int i;
1243 : enum drm_connector_force force = DRM_FORCE_UNSPECIFIED;
1244 :
1245 : #ifdef CONFIG_FB
1246 : if (!mode_option)
1247 : mode_option = fb_mode_option;
1248 : #endif
1249 :
1250 : if (!mode_option) {
1251 : mode->specified = false;
1252 : return false;
1253 : }
1254 :
1255 : name = mode_option;
1256 : namelen = strlen(name);
1257 : for (i = namelen-1; i >= 0; i--) {
1258 : switch (name[i]) {
1259 : case '@':
1260 : if (!refresh_specified && !bpp_specified &&
1261 : !yres_specified && !cvt && !rb && was_digit) {
1262 : refresh = simple_strtol(&name[i+1], NULL, 10);
1263 : refresh_specified = true;
1264 : was_digit = false;
1265 : } else
1266 : goto done;
1267 : break;
1268 : case '-':
1269 : if (!bpp_specified && !yres_specified && !cvt &&
1270 : !rb && was_digit) {
1271 : bpp = simple_strtol(&name[i+1], NULL, 10);
1272 : bpp_specified = true;
1273 : was_digit = false;
1274 : } else
1275 : goto done;
1276 : break;
1277 : case 'x':
1278 : if (!yres_specified && was_digit) {
1279 : yres = simple_strtol(&name[i+1], NULL, 10);
1280 : yres_specified = true;
1281 : was_digit = false;
1282 : } else
1283 : goto done;
1284 : break;
1285 : case '0' ... '9':
1286 : was_digit = true;
1287 : break;
1288 : case 'M':
1289 : if (yres_specified || cvt || was_digit)
1290 : goto done;
1291 : cvt = true;
1292 : break;
1293 : case 'R':
1294 : if (yres_specified || cvt || rb || was_digit)
1295 : goto done;
1296 : rb = true;
1297 : break;
1298 : case 'm':
1299 : if (cvt || yres_specified || was_digit)
1300 : goto done;
1301 : margins = true;
1302 : break;
1303 : case 'i':
1304 : if (cvt || yres_specified || was_digit)
1305 : goto done;
1306 : interlace = true;
1307 : break;
1308 : case 'e':
1309 : if (yres_specified || bpp_specified || refresh_specified ||
1310 : was_digit || (force != DRM_FORCE_UNSPECIFIED))
1311 : goto done;
1312 :
1313 : force = DRM_FORCE_ON;
1314 : break;
1315 : case 'D':
1316 : if (yres_specified || bpp_specified || refresh_specified ||
1317 : was_digit || (force != DRM_FORCE_UNSPECIFIED))
1318 : goto done;
1319 :
1320 : if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) &&
1321 : (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB))
1322 : force = DRM_FORCE_ON;
1323 : else
1324 : force = DRM_FORCE_ON_DIGITAL;
1325 : break;
1326 : case 'd':
1327 : if (yres_specified || bpp_specified || refresh_specified ||
1328 : was_digit || (force != DRM_FORCE_UNSPECIFIED))
1329 : goto done;
1330 :
1331 : force = DRM_FORCE_OFF;
1332 : break;
1333 : default:
1334 : goto done;
1335 : }
1336 : }
1337 :
1338 : if (i < 0 && yres_specified) {
1339 : char *ch;
1340 : xres = simple_strtol(name, &ch, 10);
1341 : if ((ch != NULL) && (*ch == 'x'))
1342 : res_specified = true;
1343 : else
1344 : i = ch - name;
1345 : } else if (!yres_specified && was_digit) {
1346 : /* catch mode that begins with digits but has no 'x' */
1347 : i = 0;
1348 : }
1349 : done:
1350 : if (i >= 0) {
1351 : printk(KERN_WARNING
1352 : "parse error at position %i in video mode '%s'\n",
1353 : i, name);
1354 : mode->specified = false;
1355 : return false;
1356 : }
1357 :
1358 : if (res_specified) {
1359 : mode->specified = true;
1360 : mode->xres = xres;
1361 : mode->yres = yres;
1362 : }
1363 :
1364 : if (refresh_specified) {
1365 : mode->refresh_specified = true;
1366 : mode->refresh = refresh;
1367 : }
1368 :
1369 : if (bpp_specified) {
1370 : mode->bpp_specified = true;
1371 : mode->bpp = bpp;
1372 : }
1373 : mode->rb = rb;
1374 : mode->cvt = cvt;
1375 : mode->interlace = interlace;
1376 : mode->margins = margins;
1377 : mode->force = force;
1378 :
1379 : return true;
1380 : #else
1381 0 : return false;
1382 : #endif
1383 : }
1384 : EXPORT_SYMBOL(drm_mode_parse_command_line_for_connector);
1385 :
1386 : /**
1387 : * drm_mode_create_from_cmdline_mode - convert a command line modeline into a DRM display mode
1388 : * @dev: DRM device to create the new mode for
1389 : * @cmd: input command line modeline
1390 : *
1391 : * Returns:
1392 : * Pointer to converted mode on success, NULL on error.
1393 : */
1394 : struct drm_display_mode *
1395 0 : drm_mode_create_from_cmdline_mode(struct drm_device *dev,
1396 : struct drm_cmdline_mode *cmd)
1397 : {
1398 : struct drm_display_mode *mode;
1399 :
1400 0 : if (cmd->cvt)
1401 0 : mode = drm_cvt_mode(dev,
1402 : cmd->xres, cmd->yres,
1403 0 : cmd->refresh_specified ? cmd->refresh : 60,
1404 0 : cmd->rb, cmd->interlace,
1405 0 : cmd->margins);
1406 : else
1407 0 : mode = drm_gtf_mode(dev,
1408 : cmd->xres, cmd->yres,
1409 0 : cmd->refresh_specified ? cmd->refresh : 60,
1410 0 : cmd->interlace,
1411 0 : cmd->margins);
1412 0 : if (!mode)
1413 0 : return NULL;
1414 :
1415 0 : mode->type |= DRM_MODE_TYPE_USERDEF;
1416 : /* fix up 1368x768: GFT/CVT can't express 1366 width due to alignment */
1417 0 : if (cmd->xres == 1366 && mode->hdisplay == 1368) {
1418 0 : mode->hdisplay = 1366;
1419 0 : mode->hsync_start--;
1420 0 : mode->hsync_end--;
1421 0 : drm_mode_set_name(mode);
1422 0 : }
1423 0 : drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
1424 0 : return mode;
1425 0 : }
1426 : EXPORT_SYMBOL(drm_mode_create_from_cmdline_mode);
1427 :
1428 : /**
1429 : * drm_crtc_convert_to_umode - convert a drm_display_mode into a modeinfo
1430 : * @out: drm_mode_modeinfo struct to return to the user
1431 : * @in: drm_display_mode to use
1432 : *
1433 : * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to
1434 : * the user.
1435 : */
1436 0 : void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out,
1437 : const struct drm_display_mode *in)
1438 : {
1439 0 : WARN(in->hdisplay > USHRT_MAX || in->hsync_start > USHRT_MAX ||
1440 : in->hsync_end > USHRT_MAX || in->htotal > USHRT_MAX ||
1441 : in->hskew > USHRT_MAX || in->vdisplay > USHRT_MAX ||
1442 : in->vsync_start > USHRT_MAX || in->vsync_end > USHRT_MAX ||
1443 : in->vtotal > USHRT_MAX || in->vscan > USHRT_MAX,
1444 : "timing values too large for mode info\n");
1445 :
1446 0 : out->clock = in->clock;
1447 0 : out->hdisplay = in->hdisplay;
1448 0 : out->hsync_start = in->hsync_start;
1449 0 : out->hsync_end = in->hsync_end;
1450 0 : out->htotal = in->htotal;
1451 0 : out->hskew = in->hskew;
1452 0 : out->vdisplay = in->vdisplay;
1453 0 : out->vsync_start = in->vsync_start;
1454 0 : out->vsync_end = in->vsync_end;
1455 0 : out->vtotal = in->vtotal;
1456 0 : out->vscan = in->vscan;
1457 0 : out->vrefresh = in->vrefresh;
1458 0 : out->flags = in->flags;
1459 0 : out->type = in->type;
1460 0 : strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN);
1461 0 : out->name[DRM_DISPLAY_MODE_LEN-1] = 0;
1462 0 : }
1463 :
1464 : /**
1465 : * drm_crtc_convert_umode - convert a modeinfo into a drm_display_mode
1466 : * @out: drm_display_mode to return to the user
1467 : * @in: drm_mode_modeinfo to use
1468 : *
1469 : * Convert a drm_mode_modeinfo into a drm_display_mode structure to return to
1470 : * the caller.
1471 : *
1472 : * Returns:
1473 : * Zero on success, negative errno on failure.
1474 : */
1475 0 : int drm_mode_convert_umode(struct drm_display_mode *out,
1476 : const struct drm_mode_modeinfo *in)
1477 : {
1478 : int ret = -EINVAL;
1479 :
1480 0 : if (in->clock > INT_MAX || in->vrefresh > INT_MAX) {
1481 : ret = -ERANGE;
1482 0 : goto out;
1483 : }
1484 :
1485 0 : if ((in->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX)
1486 : goto out;
1487 :
1488 0 : out->clock = in->clock;
1489 0 : out->hdisplay = in->hdisplay;
1490 0 : out->hsync_start = in->hsync_start;
1491 0 : out->hsync_end = in->hsync_end;
1492 0 : out->htotal = in->htotal;
1493 0 : out->hskew = in->hskew;
1494 0 : out->vdisplay = in->vdisplay;
1495 0 : out->vsync_start = in->vsync_start;
1496 0 : out->vsync_end = in->vsync_end;
1497 0 : out->vtotal = in->vtotal;
1498 0 : out->vscan = in->vscan;
1499 0 : out->vrefresh = in->vrefresh;
1500 0 : out->flags = in->flags;
1501 0 : out->type = in->type;
1502 0 : strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN);
1503 0 : out->name[DRM_DISPLAY_MODE_LEN-1] = 0;
1504 :
1505 0 : out->status = drm_mode_validate_basic(out);
1506 0 : if (out->status != MODE_OK)
1507 : goto out;
1508 :
1509 0 : drm_mode_set_crtcinfo(out, CRTC_INTERLACE_HALVE_V);
1510 :
1511 0 : ret = 0;
1512 :
1513 : out:
1514 0 : return ret;
1515 : }
|
