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
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:
16 * The above copyright notice and this permission notice shall be included in
17 * all copies or substantial portions of the Software.
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.
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).
33 #include <linux/list.h>
34 #include <linux/list_sort.h>
35 #include <linux/export.h>
41 * drm_mode_debug_printmodeline - debug print a mode
43 * @mode: mode to print
48 * Describe @mode using DRM_DEBUG.
50 void drm_mode_debug_printmodeline(struct drm_display_mode
*mode
)
52 DRM_DEBUG_KMS("Modeline %d:\"%s\" %d %d %d %d %d %d %d %d %d %d "
54 mode
->base
.id
, mode
->name
, mode
->vrefresh
, mode
->clock
,
55 mode
->hdisplay
, mode
->hsync_start
,
56 mode
->hsync_end
, mode
->htotal
,
57 mode
->vdisplay
, mode
->vsync_start
,
58 mode
->vsync_end
, mode
->vtotal
, mode
->type
, mode
->flags
);
60 EXPORT_SYMBOL(drm_mode_debug_printmodeline
);
63 * drm_cvt_mode -create a modeline based on CVT algorithm
65 * @hdisplay: hdisplay size
66 * @vdisplay: vdisplay size
67 * @vrefresh : vrefresh rate
68 * @reduced : Whether the GTF calculation is simplified
69 * @interlaced:Whether the interlace is supported
74 * return the modeline based on CVT algorithm
76 * This function is called to generate the modeline based on CVT algorithm
77 * according to the hdisplay, vdisplay, vrefresh.
78 * It is based from the VESA(TM) Coordinated Video Timing Generator by
79 * Graham Loveridge April 9, 2003 available at
80 * http://www.elo.utfsm.cl/~elo212/docs/CVTd6r1.xls
82 * And it is copied from xf86CVTmode in xserver/hw/xfree86/modes/xf86cvt.c.
83 * What I have done is to translate it by using integer calculation.
85 #define HV_FACTOR 1000
86 struct drm_display_mode
*drm_cvt_mode(struct drm_device
*dev
, int hdisplay
,
87 int vdisplay
, int vrefresh
,
88 bool reduced
, bool interlaced
, bool margins
)
90 /* 1) top/bottom margin size (% of height) - default: 1.8, */
91 #define CVT_MARGIN_PERCENTAGE 18
92 /* 2) character cell horizontal granularity (pixels) - default 8 */
93 #define CVT_H_GRANULARITY 8
94 /* 3) Minimum vertical porch (lines) - default 3 */
95 #define CVT_MIN_V_PORCH 3
96 /* 4) Minimum number of vertical back porch lines - default 6 */
97 #define CVT_MIN_V_BPORCH 6
98 /* Pixel Clock step (kHz) */
99 #define CVT_CLOCK_STEP 250
100 struct drm_display_mode
*drm_mode
;
101 unsigned int vfieldrate
, hperiod
;
102 int hdisplay_rnd
, hmargin
, vdisplay_rnd
, vmargin
, vsync
;
105 /* allocate the drm_display_mode structure. If failure, we will
108 drm_mode
= drm_mode_create(dev
);
112 /* the CVT default refresh rate is 60Hz */
116 /* the required field fresh rate */
118 vfieldrate
= vrefresh
* 2;
120 vfieldrate
= vrefresh
;
122 /* horizontal pixels */
123 hdisplay_rnd
= hdisplay
- (hdisplay
% CVT_H_GRANULARITY
);
125 /* determine the left&right borders */
128 hmargin
= hdisplay_rnd
* CVT_MARGIN_PERCENTAGE
/ 1000;
129 hmargin
-= hmargin
% CVT_H_GRANULARITY
;
131 /* find the total active pixels */
132 drm_mode
->hdisplay
= hdisplay_rnd
+ 2 * hmargin
;
134 /* find the number of lines per field */
136 vdisplay_rnd
= vdisplay
/ 2;
138 vdisplay_rnd
= vdisplay
;
140 /* find the top & bottom borders */
143 vmargin
= vdisplay_rnd
* CVT_MARGIN_PERCENTAGE
/ 1000;
145 drm_mode
->vdisplay
= vdisplay
+ 2 * vmargin
;
153 /* Determine VSync Width from aspect ratio */
154 if (!(vdisplay
% 3) && ((vdisplay
* 4 / 3) == hdisplay
))
156 else if (!(vdisplay
% 9) && ((vdisplay
* 16 / 9) == hdisplay
))
158 else if (!(vdisplay
% 10) && ((vdisplay
* 16 / 10) == hdisplay
))
160 else if (!(vdisplay
% 4) && ((vdisplay
* 5 / 4) == hdisplay
))
162 else if (!(vdisplay
% 9) && ((vdisplay
* 15 / 9) == hdisplay
))
168 /* simplify the GTF calculation */
169 /* 4) Minimum time of vertical sync + back porch interval (µs)
173 #define CVT_MIN_VSYNC_BP 550
174 /* 3) Nominal HSync width (% of line period) - default 8 */
175 #define CVT_HSYNC_PERCENTAGE 8
176 unsigned int hblank_percentage
;
177 int vsyncandback_porch
, vback_porch
, hblank
;
179 /* estimated the horizontal period */
180 tmp1
= HV_FACTOR
* 1000000 -
181 CVT_MIN_VSYNC_BP
* HV_FACTOR
* vfieldrate
;
182 tmp2
= (vdisplay_rnd
+ 2 * vmargin
+ CVT_MIN_V_PORCH
) * 2 +
184 hperiod
= tmp1
* 2 / (tmp2
* vfieldrate
);
186 tmp1
= CVT_MIN_VSYNC_BP
* HV_FACTOR
/ hperiod
+ 1;
187 /* 9. Find number of lines in sync + backporch */
188 if (tmp1
< (vsync
+ CVT_MIN_V_PORCH
))
189 vsyncandback_porch
= vsync
+ CVT_MIN_V_PORCH
;
191 vsyncandback_porch
= tmp1
;
192 /* 10. Find number of lines in back porch */
193 vback_porch
= vsyncandback_porch
- vsync
;
194 drm_mode
->vtotal
= vdisplay_rnd
+ 2 * vmargin
+
195 vsyncandback_porch
+ CVT_MIN_V_PORCH
;
196 /* 5) Definition of Horizontal blanking time limitation */
197 /* Gradient (%/kHz) - default 600 */
198 #define CVT_M_FACTOR 600
199 /* Offset (%) - default 40 */
200 #define CVT_C_FACTOR 40
201 /* Blanking time scaling factor - default 128 */
202 #define CVT_K_FACTOR 128
203 /* Scaling factor weighting - default 20 */
204 #define CVT_J_FACTOR 20
205 #define CVT_M_PRIME (CVT_M_FACTOR * CVT_K_FACTOR / 256)
206 #define CVT_C_PRIME ((CVT_C_FACTOR - CVT_J_FACTOR) * CVT_K_FACTOR / 256 + \
208 /* 12. Find ideal blanking duty cycle from formula */
209 hblank_percentage
= CVT_C_PRIME
* HV_FACTOR
- CVT_M_PRIME
*
211 /* 13. Blanking time */
212 if (hblank_percentage
< 20 * HV_FACTOR
)
213 hblank_percentage
= 20 * HV_FACTOR
;
214 hblank
= drm_mode
->hdisplay
* hblank_percentage
/
215 (100 * HV_FACTOR
- hblank_percentage
);
216 hblank
-= hblank
% (2 * CVT_H_GRANULARITY
);
217 /* 14. find the total pixes per line */
218 drm_mode
->htotal
= drm_mode
->hdisplay
+ hblank
;
219 drm_mode
->hsync_end
= drm_mode
->hdisplay
+ hblank
/ 2;
220 drm_mode
->hsync_start
= drm_mode
->hsync_end
-
221 (drm_mode
->htotal
* CVT_HSYNC_PERCENTAGE
) / 100;
222 drm_mode
->hsync_start
+= CVT_H_GRANULARITY
-
223 drm_mode
->hsync_start
% CVT_H_GRANULARITY
;
224 /* fill the Vsync values */
225 drm_mode
->vsync_start
= drm_mode
->vdisplay
+ CVT_MIN_V_PORCH
;
226 drm_mode
->vsync_end
= drm_mode
->vsync_start
+ vsync
;
228 /* Reduced blanking */
229 /* Minimum vertical blanking interval time (µs)- default 460 */
230 #define CVT_RB_MIN_VBLANK 460
231 /* Fixed number of clocks for horizontal sync */
232 #define CVT_RB_H_SYNC 32
233 /* Fixed number of clocks for horizontal blanking */
234 #define CVT_RB_H_BLANK 160
235 /* Fixed number of lines for vertical front porch - default 3*/
236 #define CVT_RB_VFPORCH 3
239 /* 8. Estimate Horizontal period. */
240 tmp1
= HV_FACTOR
* 1000000 -
241 CVT_RB_MIN_VBLANK
* HV_FACTOR
* vfieldrate
;
242 tmp2
= vdisplay_rnd
+ 2 * vmargin
;
243 hperiod
= tmp1
/ (tmp2
* vfieldrate
);
244 /* 9. Find number of lines in vertical blanking */
245 vbilines
= CVT_RB_MIN_VBLANK
* HV_FACTOR
/ hperiod
+ 1;
246 /* 10. Check if vertical blanking is sufficient */
247 if (vbilines
< (CVT_RB_VFPORCH
+ vsync
+ CVT_MIN_V_BPORCH
))
248 vbilines
= CVT_RB_VFPORCH
+ vsync
+ CVT_MIN_V_BPORCH
;
249 /* 11. Find total number of lines in vertical field */
250 drm_mode
->vtotal
= vdisplay_rnd
+ 2 * vmargin
+ vbilines
;
251 /* 12. Find total number of pixels in a line */
252 drm_mode
->htotal
= drm_mode
->hdisplay
+ CVT_RB_H_BLANK
;
253 /* Fill in HSync values */
254 drm_mode
->hsync_end
= drm_mode
->hdisplay
+ CVT_RB_H_BLANK
/ 2;
255 drm_mode
->hsync_start
= drm_mode
->hsync_end
- CVT_RB_H_SYNC
;
256 /* Fill in VSync values */
257 drm_mode
->vsync_start
= drm_mode
->vdisplay
+ CVT_RB_VFPORCH
;
258 drm_mode
->vsync_end
= drm_mode
->vsync_start
+ vsync
;
260 /* 15/13. Find pixel clock frequency (kHz for xf86) */
261 drm_mode
->clock
= drm_mode
->htotal
* HV_FACTOR
* 1000 / hperiod
;
262 drm_mode
->clock
-= drm_mode
->clock
% CVT_CLOCK_STEP
;
263 /* 18/16. Find actual vertical frame frequency */
264 /* ignore - just set the mode flag for interlaced */
266 drm_mode
->vtotal
*= 2;
267 drm_mode
->flags
|= DRM_MODE_FLAG_INTERLACE
;
269 /* Fill the mode line name */
270 drm_mode_set_name(drm_mode
);
272 drm_mode
->flags
|= (DRM_MODE_FLAG_PHSYNC
|
273 DRM_MODE_FLAG_NVSYNC
);
275 drm_mode
->flags
|= (DRM_MODE_FLAG_PVSYNC
|
276 DRM_MODE_FLAG_NHSYNC
);
280 EXPORT_SYMBOL(drm_cvt_mode
);
283 * drm_gtf_mode_complex - create the modeline based on full GTF algorithm
286 * @hdisplay :hdisplay size
287 * @vdisplay :vdisplay size
288 * @vrefresh :vrefresh rate.
289 * @interlaced :whether the interlace is supported
290 * @margins :desired margin size
291 * @GTF_[MCKJ] :extended GTF formula parameters
296 * return the modeline based on full GTF algorithm.
298 * GTF feature blocks specify C and J in multiples of 0.5, so we pass them
299 * in here multiplied by two. For a C of 40, pass in 80.
301 struct drm_display_mode
*
302 drm_gtf_mode_complex(struct drm_device
*dev
, int hdisplay
, int vdisplay
,
303 int vrefresh
, bool interlaced
, int margins
,
304 int GTF_M
, int GTF_2C
, int GTF_K
, int GTF_2J
)
305 { /* 1) top/bottom margin size (% of height) - default: 1.8, */
306 #define GTF_MARGIN_PERCENTAGE 18
307 /* 2) character cell horizontal granularity (pixels) - default 8 */
308 #define GTF_CELL_GRAN 8
309 /* 3) Minimum vertical porch (lines) - default 3 */
310 #define GTF_MIN_V_PORCH 1
311 /* width of vsync in lines */
313 /* width of hsync as % of total line */
314 #define H_SYNC_PERCENT 8
315 /* min time of vsync + back porch (microsec) */
316 #define MIN_VSYNC_PLUS_BP 550
317 /* C' and M' are part of the Blanking Duty Cycle computation */
318 #define GTF_C_PRIME ((((GTF_2C - GTF_2J) * GTF_K / 256) + GTF_2J) / 2)
319 #define GTF_M_PRIME (GTF_K * GTF_M / 256)
320 struct drm_display_mode
*drm_mode
;
321 unsigned int hdisplay_rnd
, vdisplay_rnd
, vfieldrate_rqd
;
322 int top_margin
, bottom_margin
;
324 unsigned int hfreq_est
;
325 int vsync_plus_bp
, vback_porch
;
326 unsigned int vtotal_lines
, vfieldrate_est
, hperiod
;
327 unsigned int vfield_rate
, vframe_rate
;
328 int left_margin
, right_margin
;
329 unsigned int total_active_pixels
, ideal_duty_cycle
;
330 unsigned int hblank
, total_pixels
, pixel_freq
;
331 int hsync
, hfront_porch
, vodd_front_porch_lines
;
332 unsigned int tmp1
, tmp2
;
334 drm_mode
= drm_mode_create(dev
);
338 /* 1. In order to give correct results, the number of horizontal
339 * pixels requested is first processed to ensure that it is divisible
340 * by the character size, by rounding it to the nearest character
343 hdisplay_rnd
= (hdisplay
+ GTF_CELL_GRAN
/ 2) / GTF_CELL_GRAN
;
344 hdisplay_rnd
= hdisplay_rnd
* GTF_CELL_GRAN
;
346 /* 2. If interlace is requested, the number of vertical lines assumed
347 * by the calculation must be halved, as the computation calculates
348 * the number of vertical lines per field.
351 vdisplay_rnd
= vdisplay
/ 2;
353 vdisplay_rnd
= vdisplay
;
355 /* 3. Find the frame rate required: */
357 vfieldrate_rqd
= vrefresh
* 2;
359 vfieldrate_rqd
= vrefresh
;
361 /* 4. Find number of lines in Top margin: */
364 top_margin
= (vdisplay_rnd
* GTF_MARGIN_PERCENTAGE
+ 500) /
366 /* 5. Find number of lines in bottom margin: */
367 bottom_margin
= top_margin
;
369 /* 6. If interlace is required, then set variable interlace: */
375 /* 7. Estimate the Horizontal frequency */
377 tmp1
= (1000000 - MIN_VSYNC_PLUS_BP
* vfieldrate_rqd
) / 500;
378 tmp2
= (vdisplay_rnd
+ 2 * top_margin
+ GTF_MIN_V_PORCH
) *
380 hfreq_est
= (tmp2
* 1000 * vfieldrate_rqd
) / tmp1
;
383 /* 8. Find the number of lines in V sync + back porch */
384 /* [V SYNC+BP] = RINT(([MIN VSYNC+BP] * hfreq_est / 1000000)) */
385 vsync_plus_bp
= MIN_VSYNC_PLUS_BP
* hfreq_est
/ 1000;
386 vsync_plus_bp
= (vsync_plus_bp
+ 500) / 1000;
387 /* 9. Find the number of lines in V back porch alone: */
388 vback_porch
= vsync_plus_bp
- V_SYNC_RQD
;
389 /* 10. Find the total number of lines in Vertical field period: */
390 vtotal_lines
= vdisplay_rnd
+ top_margin
+ bottom_margin
+
391 vsync_plus_bp
+ GTF_MIN_V_PORCH
;
392 /* 11. Estimate the Vertical field frequency: */
393 vfieldrate_est
= hfreq_est
/ vtotal_lines
;
394 /* 12. Find the actual horizontal period: */
395 hperiod
= 1000000 / (vfieldrate_rqd
* vtotal_lines
);
397 /* 13. Find the actual Vertical field frequency: */
398 vfield_rate
= hfreq_est
/ vtotal_lines
;
399 /* 14. Find the Vertical frame frequency: */
401 vframe_rate
= vfield_rate
/ 2;
403 vframe_rate
= vfield_rate
;
404 /* 15. Find number of pixels in left margin: */
406 left_margin
= (hdisplay_rnd
* GTF_MARGIN_PERCENTAGE
+ 500) /
411 /* 16.Find number of pixels in right margin: */
412 right_margin
= left_margin
;
413 /* 17.Find total number of active pixels in image and left and right */
414 total_active_pixels
= hdisplay_rnd
+ left_margin
+ right_margin
;
415 /* 18.Find the ideal blanking duty cycle from blanking duty cycle */
416 ideal_duty_cycle
= GTF_C_PRIME
* 1000 -
417 (GTF_M_PRIME
* 1000000 / hfreq_est
);
418 /* 19.Find the number of pixels in the blanking time to the nearest
419 * double character cell: */
420 hblank
= total_active_pixels
* ideal_duty_cycle
/
421 (100000 - ideal_duty_cycle
);
422 hblank
= (hblank
+ GTF_CELL_GRAN
) / (2 * GTF_CELL_GRAN
);
423 hblank
= hblank
* 2 * GTF_CELL_GRAN
;
424 /* 20.Find total number of pixels: */
425 total_pixels
= total_active_pixels
+ hblank
;
426 /* 21.Find pixel clock frequency: */
427 pixel_freq
= total_pixels
* hfreq_est
/ 1000;
428 /* Stage 1 computations are now complete; I should really pass
429 * the results to another function and do the Stage 2 computations,
430 * but I only need a few more values so I'll just append the
431 * computations here for now */
432 /* 17. Find the number of pixels in the horizontal sync period: */
433 hsync
= H_SYNC_PERCENT
* total_pixels
/ 100;
434 hsync
= (hsync
+ GTF_CELL_GRAN
/ 2) / GTF_CELL_GRAN
;
435 hsync
= hsync
* GTF_CELL_GRAN
;
436 /* 18. Find the number of pixels in horizontal front porch period */
437 hfront_porch
= hblank
/ 2 - hsync
;
438 /* 36. Find the number of lines in the odd front porch period: */
439 vodd_front_porch_lines
= GTF_MIN_V_PORCH
;
441 /* finally, pack the results in the mode struct */
442 drm_mode
->hdisplay
= hdisplay_rnd
;
443 drm_mode
->hsync_start
= hdisplay_rnd
+ hfront_porch
;
444 drm_mode
->hsync_end
= drm_mode
->hsync_start
+ hsync
;
445 drm_mode
->htotal
= total_pixels
;
446 drm_mode
->vdisplay
= vdisplay_rnd
;
447 drm_mode
->vsync_start
= vdisplay_rnd
+ vodd_front_porch_lines
;
448 drm_mode
->vsync_end
= drm_mode
->vsync_start
+ V_SYNC_RQD
;
449 drm_mode
->vtotal
= vtotal_lines
;
451 drm_mode
->clock
= pixel_freq
;
454 drm_mode
->vtotal
*= 2;
455 drm_mode
->flags
|= DRM_MODE_FLAG_INTERLACE
;
458 drm_mode_set_name(drm_mode
);
459 if (GTF_M
== 600 && GTF_2C
== 80 && GTF_K
== 128 && GTF_2J
== 40)
460 drm_mode
->flags
= DRM_MODE_FLAG_NHSYNC
| DRM_MODE_FLAG_PVSYNC
;
462 drm_mode
->flags
= DRM_MODE_FLAG_PHSYNC
| DRM_MODE_FLAG_NVSYNC
;
466 EXPORT_SYMBOL(drm_gtf_mode_complex
);
469 * drm_gtf_mode - create the modeline based on GTF algorithm
472 * @hdisplay :hdisplay size
473 * @vdisplay :vdisplay size
474 * @vrefresh :vrefresh rate.
475 * @interlaced :whether the interlace is supported
476 * @margins :whether the margin is supported
481 * return the modeline based on GTF algorithm
483 * This function is to create the modeline based on the GTF algorithm.
484 * Generalized Timing Formula is derived from:
485 * GTF Spreadsheet by Andy Morrish (1/5/97)
486 * available at http://www.vesa.org
488 * And it is copied from the file of xserver/hw/xfree86/modes/xf86gtf.c.
489 * What I have done is to translate it by using integer calculation.
490 * I also refer to the function of fb_get_mode in the file of
491 * drivers/video/fbmon.c
493 * Standard GTF parameters:
499 struct drm_display_mode
*
500 drm_gtf_mode(struct drm_device
*dev
, int hdisplay
, int vdisplay
, int vrefresh
,
501 bool lace
, int margins
)
503 return drm_gtf_mode_complex(dev
, hdisplay
, vdisplay
, vrefresh
, lace
,
504 margins
, 600, 40 * 2, 128, 20 * 2);
506 EXPORT_SYMBOL(drm_gtf_mode
);
509 * drm_mode_set_name - set the name on a mode
510 * @mode: name will be set in this mode
515 * Set the name of @mode to a standard format.
517 void drm_mode_set_name(struct drm_display_mode
*mode
)
519 bool interlaced
= !!(mode
->flags
& DRM_MODE_FLAG_INTERLACE
);
521 snprintf(mode
->name
, DRM_DISPLAY_MODE_LEN
, "%dx%d%s",
522 mode
->hdisplay
, mode
->vdisplay
,
523 interlaced
? "i" : "");
525 EXPORT_SYMBOL(drm_mode_set_name
);
528 * drm_mode_list_concat - move modes from one list to another
533 * Caller must ensure both lists are locked.
535 * Move all the modes from @head to @new.
537 void drm_mode_list_concat(struct list_head
*head
, struct list_head
*new)
540 struct list_head
*entry
, *tmp
;
542 list_for_each_safe(entry
, tmp
, head
) {
543 list_move_tail(entry
, new);
546 EXPORT_SYMBOL(drm_mode_list_concat
);
549 * drm_mode_width - get the width of a mode
555 * Return @mode's width (hdisplay) value.
557 * FIXME: is this needed?
562 int drm_mode_width(struct drm_display_mode
*mode
)
564 return mode
->hdisplay
;
567 EXPORT_SYMBOL(drm_mode_width
);
570 * drm_mode_height - get the height of a mode
576 * Return @mode's height (vdisplay) value.
578 * FIXME: is this needed?
583 int drm_mode_height(struct drm_display_mode
*mode
)
585 return mode
->vdisplay
;
587 EXPORT_SYMBOL(drm_mode_height
);
589 /** drm_mode_hsync - get the hsync of a mode
595 * Return @modes's hsync rate in kHz, rounded to the nearest int.
597 int drm_mode_hsync(const struct drm_display_mode
*mode
)
599 unsigned int calc_val
;
604 if (mode
->htotal
< 0)
607 calc_val
= (mode
->clock
* 1000) / mode
->htotal
; /* hsync in Hz */
608 calc_val
+= 500; /* round to 1000Hz */
609 calc_val
/= 1000; /* truncate to kHz */
613 EXPORT_SYMBOL(drm_mode_hsync
);
616 * drm_mode_vrefresh - get the vrefresh of a mode
622 * Return @mode's vrefresh rate in Hz or calculate it if necessary.
624 * FIXME: why is this needed? shouldn't vrefresh be set already?
627 * Vertical refresh rate. It will be the result of actual value plus 0.5.
628 * If it is 70.288, it will return 70Hz.
629 * If it is 59.6, it will return 60Hz.
631 int drm_mode_vrefresh(const struct drm_display_mode
*mode
)
634 unsigned int calc_val
;
636 if (mode
->vrefresh
> 0)
637 refresh
= mode
->vrefresh
;
638 else if (mode
->htotal
> 0 && mode
->vtotal
> 0) {
640 vtotal
= mode
->vtotal
;
641 /* work out vrefresh the value will be x1000 */
642 calc_val
= (mode
->clock
* 1000);
643 calc_val
/= mode
->htotal
;
644 refresh
= (calc_val
+ vtotal
/ 2) / vtotal
;
646 if (mode
->flags
& DRM_MODE_FLAG_INTERLACE
)
648 if (mode
->flags
& DRM_MODE_FLAG_DBLSCAN
)
651 refresh
/= mode
->vscan
;
655 EXPORT_SYMBOL(drm_mode_vrefresh
);
658 * drm_mode_set_crtcinfo - set CRTC modesetting parameters
660 * @adjust_flags: unused? (FIXME)
665 * Setup the CRTC modesetting parameters for @p, adjusting if necessary.
667 void drm_mode_set_crtcinfo(struct drm_display_mode
*p
, int adjust_flags
)
669 if ((p
== NULL
) || ((p
->type
& DRM_MODE_TYPE_CRTC_C
) == DRM_MODE_TYPE_BUILTIN
))
672 p
->crtc_hdisplay
= p
->hdisplay
;
673 p
->crtc_hsync_start
= p
->hsync_start
;
674 p
->crtc_hsync_end
= p
->hsync_end
;
675 p
->crtc_htotal
= p
->htotal
;
676 p
->crtc_hskew
= p
->hskew
;
677 p
->crtc_vdisplay
= p
->vdisplay
;
678 p
->crtc_vsync_start
= p
->vsync_start
;
679 p
->crtc_vsync_end
= p
->vsync_end
;
680 p
->crtc_vtotal
= p
->vtotal
;
682 if (p
->flags
& DRM_MODE_FLAG_INTERLACE
) {
683 if (adjust_flags
& CRTC_INTERLACE_HALVE_V
) {
684 p
->crtc_vdisplay
/= 2;
685 p
->crtc_vsync_start
/= 2;
686 p
->crtc_vsync_end
/= 2;
693 if (p
->flags
& DRM_MODE_FLAG_DBLSCAN
) {
694 p
->crtc_vdisplay
*= 2;
695 p
->crtc_vsync_start
*= 2;
696 p
->crtc_vsync_end
*= 2;
701 p
->crtc_vdisplay
*= p
->vscan
;
702 p
->crtc_vsync_start
*= p
->vscan
;
703 p
->crtc_vsync_end
*= p
->vscan
;
704 p
->crtc_vtotal
*= p
->vscan
;
707 p
->crtc_vblank_start
= min(p
->crtc_vsync_start
, p
->crtc_vdisplay
);
708 p
->crtc_vblank_end
= max(p
->crtc_vsync_end
, p
->crtc_vtotal
);
709 p
->crtc_hblank_start
= min(p
->crtc_hsync_start
, p
->crtc_hdisplay
);
710 p
->crtc_hblank_end
= max(p
->crtc_hsync_end
, p
->crtc_htotal
);
712 p
->crtc_hadjusted
= false;
713 p
->crtc_vadjusted
= false;
715 EXPORT_SYMBOL(drm_mode_set_crtcinfo
);
719 * drm_mode_duplicate - allocate and duplicate an existing mode
720 * @m: mode to duplicate
725 * Just allocate a new mode, copy the existing mode into it, and return
726 * a pointer to it. Used to create new instances of established modes.
728 struct drm_display_mode
*drm_mode_duplicate(struct drm_device
*dev
,
729 const struct drm_display_mode
*mode
)
731 struct drm_display_mode
*nmode
;
734 nmode
= drm_mode_create(dev
);
738 new_id
= nmode
->base
.id
;
740 nmode
->base
.id
= new_id
;
741 INIT_LIST_HEAD(&nmode
->head
);
744 EXPORT_SYMBOL(drm_mode_duplicate
);
747 * drm_mode_equal - test modes for equality
749 * @mode2: second mode
754 * Check to see if @mode1 and @mode2 are equivalent.
757 * True if the modes are equal, false otherwise.
759 bool drm_mode_equal(struct drm_display_mode
*mode1
, struct drm_display_mode
*mode2
)
761 /* do clock check convert to PICOS so fb modes get matched
763 if (mode1
->clock
&& mode2
->clock
) {
764 if (KHZ2PICOS(mode1
->clock
) != KHZ2PICOS(mode2
->clock
))
766 } else if (mode1
->clock
!= mode2
->clock
)
769 if (mode1
->hdisplay
== mode2
->hdisplay
&&
770 mode1
->hsync_start
== mode2
->hsync_start
&&
771 mode1
->hsync_end
== mode2
->hsync_end
&&
772 mode1
->htotal
== mode2
->htotal
&&
773 mode1
->hskew
== mode2
->hskew
&&
774 mode1
->vdisplay
== mode2
->vdisplay
&&
775 mode1
->vsync_start
== mode2
->vsync_start
&&
776 mode1
->vsync_end
== mode2
->vsync_end
&&
777 mode1
->vtotal
== mode2
->vtotal
&&
778 mode1
->vscan
== mode2
->vscan
&&
779 mode1
->flags
== mode2
->flags
)
784 EXPORT_SYMBOL(drm_mode_equal
);
787 * drm_mode_validate_size - make sure modes adhere to size constraints
789 * @mode_list: list of modes to check
790 * @maxX: maximum width
791 * @maxY: maximum height
792 * @maxPitch: max pitch
795 * Caller must hold a lock protecting @mode_list.
797 * The DRM device (@dev) has size and pitch limits. Here we validate the
798 * modes we probed for @dev against those limits and set their status as
801 void drm_mode_validate_size(struct drm_device
*dev
,
802 struct list_head
*mode_list
,
803 int maxX
, int maxY
, int maxPitch
)
805 struct drm_display_mode
*mode
;
807 list_for_each_entry(mode
, mode_list
, head
) {
808 if (maxPitch
> 0 && mode
->hdisplay
> maxPitch
)
809 mode
->status
= MODE_BAD_WIDTH
;
811 if (maxX
> 0 && mode
->hdisplay
> maxX
)
812 mode
->status
= MODE_VIRTUAL_X
;
814 if (maxY
> 0 && mode
->vdisplay
> maxY
)
815 mode
->status
= MODE_VIRTUAL_Y
;
818 EXPORT_SYMBOL(drm_mode_validate_size
);
821 * drm_mode_validate_clocks - validate modes against clock limits
823 * @mode_list: list of modes to check
824 * @min: minimum clock rate array
825 * @max: maximum clock rate array
826 * @n_ranges: number of clock ranges (size of arrays)
829 * Caller must hold a lock protecting @mode_list.
831 * Some code may need to check a mode list against the clock limits of the
832 * device in question. This function walks the mode list, testing to make
833 * sure each mode falls within a given range (defined by @min and @max
834 * arrays) and sets @mode->status as needed.
836 void drm_mode_validate_clocks(struct drm_device
*dev
,
837 struct list_head
*mode_list
,
838 int *min
, int *max
, int n_ranges
)
840 struct drm_display_mode
*mode
;
843 list_for_each_entry(mode
, mode_list
, head
) {
845 for (i
= 0; i
< n_ranges
; i
++) {
846 if (mode
->clock
>= min
[i
] && mode
->clock
<= max
[i
]) {
852 mode
->status
= MODE_CLOCK_RANGE
;
855 EXPORT_SYMBOL(drm_mode_validate_clocks
);
858 * drm_mode_prune_invalid - remove invalid modes from mode list
860 * @mode_list: list of modes to check
861 * @verbose: be verbose about it
864 * Caller must hold a lock protecting @mode_list.
866 * Once mode list generation is complete, a caller can use this routine to
867 * remove invalid modes from a mode list. If any of the modes have a
868 * status other than %MODE_OK, they are removed from @mode_list and freed.
870 void drm_mode_prune_invalid(struct drm_device
*dev
,
871 struct list_head
*mode_list
, bool verbose
)
873 struct drm_display_mode
*mode
, *t
;
875 list_for_each_entry_safe(mode
, t
, mode_list
, head
) {
876 if (mode
->status
!= MODE_OK
) {
877 list_del(&mode
->head
);
879 drm_mode_debug_printmodeline(mode
);
880 DRM_DEBUG_KMS("Not using %s mode %d\n",
881 mode
->name
, mode
->status
);
883 drm_mode_destroy(dev
, mode
);
887 EXPORT_SYMBOL(drm_mode_prune_invalid
);
890 * drm_mode_compare - compare modes for favorability
892 * @lh_a: list_head for first mode
893 * @lh_b: list_head for second mode
898 * Compare two modes, given by @lh_a and @lh_b, returning a value indicating
902 * Negative if @lh_a is better than @lh_b, zero if they're equivalent, or
903 * positive if @lh_b is better than @lh_a.
905 static int drm_mode_compare(void *priv
, struct list_head
*lh_a
, struct list_head
*lh_b
)
907 struct drm_display_mode
*a
= list_entry(lh_a
, struct drm_display_mode
, head
);
908 struct drm_display_mode
*b
= list_entry(lh_b
, struct drm_display_mode
, head
);
911 diff
= ((b
->type
& DRM_MODE_TYPE_PREFERRED
) != 0) -
912 ((a
->type
& DRM_MODE_TYPE_PREFERRED
) != 0);
915 diff
= b
->hdisplay
* b
->vdisplay
- a
->hdisplay
* a
->vdisplay
;
918 diff
= b
->clock
- a
->clock
;
923 * drm_mode_sort - sort mode list
924 * @mode_list: list to sort
927 * Caller must hold a lock protecting @mode_list.
929 * Sort @mode_list by favorability, putting good modes first.
931 void drm_mode_sort(struct list_head
*mode_list
)
933 list_sort(NULL
, mode_list
, drm_mode_compare
);
935 EXPORT_SYMBOL(drm_mode_sort
);
938 * drm_mode_connector_list_update - update the mode list for the connector
939 * @connector: the connector to update
942 * Caller must hold a lock protecting @mode_list.
944 * This moves the modes from the @connector probed_modes list
945 * to the actual mode list. It compares the probed mode against the current
946 * list and only adds different modes. All modes unverified after this point
947 * will be removed by the prune invalid modes.
949 void drm_mode_connector_list_update(struct drm_connector
*connector
)
951 struct drm_display_mode
*mode
;
952 struct drm_display_mode
*pmode
, *pt
;
955 list_for_each_entry_safe(pmode
, pt
, &connector
->probed_modes
,
958 /* go through current modes checking for the new probed mode */
959 list_for_each_entry(mode
, &connector
->modes
, head
) {
960 if (drm_mode_equal(pmode
, mode
)) {
962 /* if equal delete the probed mode */
963 mode
->status
= pmode
->status
;
964 /* Merge type bits together */
965 mode
->type
|= pmode
->type
;
966 list_del(&pmode
->head
);
967 drm_mode_destroy(connector
->dev
, pmode
);
973 list_move_tail(&pmode
->head
, &connector
->modes
);
977 EXPORT_SYMBOL(drm_mode_connector_list_update
);
980 * drm_mode_parse_command_line_for_connector - parse command line for connector
981 * @mode_option - per connector mode option
982 * @connector - connector to parse line for
984 * This parses the connector specific then generic command lines for
985 * modes and options to configure the connector.
987 * This uses the same parameters as the fb modedb.c, except for extra
988 * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd]
990 * enable/enable Digital/disable bit at the end
992 bool drm_mode_parse_command_line_for_connector(const char *mode_option
,
993 struct drm_connector
*connector
,
994 struct drm_cmdline_mode
*mode
)
997 unsigned int namelen
;
998 bool res_specified
= false, bpp_specified
= false, refresh_specified
= false;
999 unsigned int xres
= 0, yres
= 0, bpp
= 32, refresh
= 0;
1000 bool yres_specified
= false, cvt
= false, rb
= false;
1001 bool interlace
= false, margins
= false, was_digit
= false;
1003 enum drm_connector_force force
= DRM_FORCE_UNSPECIFIED
;
1007 mode_option
= fb_mode_option
;
1011 mode
->specified
= false;
1016 namelen
= strlen(name
);
1017 for (i
= namelen
-1; i
>= 0; i
--) {
1020 if (!refresh_specified
&& !bpp_specified
&&
1021 !yres_specified
&& !cvt
&& !rb
&& was_digit
) {
1022 refresh
= simple_strtol(&name
[i
+1], NULL
, 10);
1023 refresh_specified
= true;
1029 if (!bpp_specified
&& !yres_specified
&& !cvt
&&
1031 bpp
= simple_strtol(&name
[i
+1], NULL
, 10);
1032 bpp_specified
= true;
1038 if (!yres_specified
&& was_digit
) {
1039 yres
= simple_strtol(&name
[i
+1], NULL
, 10);
1040 yres_specified
= true;
1048 if (yres_specified
|| cvt
|| was_digit
)
1053 if (yres_specified
|| cvt
|| rb
|| was_digit
)
1058 if (cvt
|| yres_specified
|| was_digit
)
1063 if (cvt
|| yres_specified
|| was_digit
)
1068 if (yres_specified
|| bpp_specified
|| refresh_specified
||
1069 was_digit
|| (force
!= DRM_FORCE_UNSPECIFIED
))
1072 force
= DRM_FORCE_ON
;
1075 if (yres_specified
|| bpp_specified
|| refresh_specified
||
1076 was_digit
|| (force
!= DRM_FORCE_UNSPECIFIED
))
1079 if ((connector
->connector_type
!= DRM_MODE_CONNECTOR_DVII
) &&
1080 (connector
->connector_type
!= DRM_MODE_CONNECTOR_HDMIB
))
1081 force
= DRM_FORCE_ON
;
1083 force
= DRM_FORCE_ON_DIGITAL
;
1086 if (yres_specified
|| bpp_specified
|| refresh_specified
||
1087 was_digit
|| (force
!= DRM_FORCE_UNSPECIFIED
))
1090 force
= DRM_FORCE_OFF
;
1097 if (i
< 0 && yres_specified
) {
1099 xres
= simple_strtol(name
, &ch
, 10);
1100 if ((ch
!= NULL
) && (*ch
== 'x'))
1101 res_specified
= true;
1104 } else if (!yres_specified
&& was_digit
) {
1105 /* catch mode that begins with digits but has no 'x' */
1111 "parse error at position %i in video mode '%s'\n",
1113 mode
->specified
= false;
1117 if (res_specified
) {
1118 mode
->specified
= true;
1123 if (refresh_specified
) {
1124 mode
->refresh_specified
= true;
1125 mode
->refresh
= refresh
;
1128 if (bpp_specified
) {
1129 mode
->bpp_specified
= true;
1134 mode
->interlace
= interlace
;
1135 mode
->margins
= margins
;
1136 mode
->force
= force
;
1140 EXPORT_SYMBOL(drm_mode_parse_command_line_for_connector
);
1142 struct drm_display_mode
*
1143 drm_mode_create_from_cmdline_mode(struct drm_device
*dev
,
1144 struct drm_cmdline_mode
*cmd
)
1146 struct drm_display_mode
*mode
;
1149 mode
= drm_cvt_mode(dev
,
1150 cmd
->xres
, cmd
->yres
,
1151 cmd
->refresh_specified
? cmd
->refresh
: 60,
1152 cmd
->rb
, cmd
->interlace
,
1155 mode
= drm_gtf_mode(dev
,
1156 cmd
->xres
, cmd
->yres
,
1157 cmd
->refresh_specified
? cmd
->refresh
: 60,
1163 drm_mode_set_crtcinfo(mode
, CRTC_INTERLACE_HALVE_V
);
1166 EXPORT_SYMBOL(drm_mode_create_from_cmdline_mode
);