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/export.h>
36 #include <drm/drm_crtc.h>
37 #include <drm/drm_modes.h>
39 #include "drm_crtc_internal.h"
42 * drm_mode_debug_printmodeline - print a mode to dmesg
43 * @mode: mode to print
45 * Describe @mode using DRM_DEBUG.
47 void drm_mode_debug_printmodeline(const struct drm_display_mode
*mode
)
49 DRM_DEBUG_KMS("Modeline %d:\"%s\" %d %d %d %d %d %d %d %d %d %d "
51 mode
->base
.id
, mode
->name
, mode
->vrefresh
, mode
->clock
,
52 mode
->hdisplay
, mode
->hsync_start
,
53 mode
->hsync_end
, mode
->htotal
,
54 mode
->vdisplay
, mode
->vsync_start
,
55 mode
->vsync_end
, mode
->vtotal
, mode
->type
, mode
->flags
);
57 EXPORT_SYMBOL(drm_mode_debug_printmodeline
);
60 * drm_mode_create - create a new display mode
63 * Create a new, cleared drm_display_mode with kzalloc, allocate an ID for it
67 * Pointer to new mode on success, NULL on error.
69 struct drm_display_mode
*drm_mode_create(struct drm_device
*dev
)
71 struct drm_display_mode
*nmode
;
73 nmode
= kzalloc(sizeof(struct drm_display_mode
), GFP_KERNEL
);
77 if (drm_mode_object_get(dev
, &nmode
->base
, DRM_MODE_OBJECT_MODE
)) {
84 EXPORT_SYMBOL(drm_mode_create
);
87 * drm_mode_destroy - remove a mode
89 * @mode: mode to remove
91 * Release @mode's unique ID, then free it @mode structure itself using kfree.
93 void drm_mode_destroy(struct drm_device
*dev
, struct drm_display_mode
*mode
)
98 drm_mode_object_put(dev
, &mode
->base
);
102 EXPORT_SYMBOL(drm_mode_destroy
);
105 * drm_mode_probed_add - add a mode to a connector's probed_mode list
106 * @connector: connector the new mode
109 * Add @mode to @connector's probed_mode list for later use. This list should
110 * then in a second step get filtered and all the modes actually supported by
111 * the hardware moved to the @connector's modes list.
113 void drm_mode_probed_add(struct drm_connector
*connector
,
114 struct drm_display_mode
*mode
)
116 WARN_ON(!mutex_is_locked(&connector
->dev
->mode_config
.mutex
));
118 list_add_tail(&mode
->head
, &connector
->probed_modes
);
120 EXPORT_SYMBOL(drm_mode_probed_add
);
123 * drm_cvt_mode -create a modeline based on the CVT algorithm
125 * @hdisplay: hdisplay size
126 * @vdisplay: vdisplay size
127 * @vrefresh: vrefresh rate
128 * @reduced: whether to use reduced blanking
129 * @interlaced: whether to compute an interlaced mode
130 * @margins: whether to add margins (borders)
132 * This function is called to generate the modeline based on CVT algorithm
133 * according to the hdisplay, vdisplay, vrefresh.
134 * It is based from the VESA(TM) Coordinated Video Timing Generator by
135 * Graham Loveridge April 9, 2003 available at
136 * http://www.elo.utfsm.cl/~elo212/docs/CVTd6r1.xls
138 * And it is copied from xf86CVTmode in xserver/hw/xfree86/modes/xf86cvt.c.
139 * What I have done is to translate it by using integer calculation.
142 * The modeline based on the CVT algorithm stored in a drm_display_mode object.
143 * The display mode object is allocated with drm_mode_create(). Returns NULL
144 * when no mode could be allocated.
146 struct drm_display_mode
*drm_cvt_mode(struct drm_device
*dev
, int hdisplay
,
147 int vdisplay
, int vrefresh
,
148 bool reduced
, bool interlaced
, bool margins
)
150 #define HV_FACTOR 1000
151 /* 1) top/bottom margin size (% of height) - default: 1.8, */
152 #define CVT_MARGIN_PERCENTAGE 18
153 /* 2) character cell horizontal granularity (pixels) - default 8 */
154 #define CVT_H_GRANULARITY 8
155 /* 3) Minimum vertical porch (lines) - default 3 */
156 #define CVT_MIN_V_PORCH 3
157 /* 4) Minimum number of vertical back porch lines - default 6 */
158 #define CVT_MIN_V_BPORCH 6
159 /* Pixel Clock step (kHz) */
160 #define CVT_CLOCK_STEP 250
161 struct drm_display_mode
*drm_mode
;
162 unsigned int vfieldrate
, hperiod
;
163 int hdisplay_rnd
, hmargin
, vdisplay_rnd
, vmargin
, vsync
;
166 /* allocate the drm_display_mode structure. If failure, we will
169 drm_mode
= drm_mode_create(dev
);
173 /* the CVT default refresh rate is 60Hz */
177 /* the required field fresh rate */
179 vfieldrate
= vrefresh
* 2;
181 vfieldrate
= vrefresh
;
183 /* horizontal pixels */
184 hdisplay_rnd
= hdisplay
- (hdisplay
% CVT_H_GRANULARITY
);
186 /* determine the left&right borders */
189 hmargin
= hdisplay_rnd
* CVT_MARGIN_PERCENTAGE
/ 1000;
190 hmargin
-= hmargin
% CVT_H_GRANULARITY
;
192 /* find the total active pixels */
193 drm_mode
->hdisplay
= hdisplay_rnd
+ 2 * hmargin
;
195 /* find the number of lines per field */
197 vdisplay_rnd
= vdisplay
/ 2;
199 vdisplay_rnd
= vdisplay
;
201 /* find the top & bottom borders */
204 vmargin
= vdisplay_rnd
* CVT_MARGIN_PERCENTAGE
/ 1000;
206 drm_mode
->vdisplay
= vdisplay
+ 2 * vmargin
;
214 /* Determine VSync Width from aspect ratio */
215 if (!(vdisplay
% 3) && ((vdisplay
* 4 / 3) == hdisplay
))
217 else if (!(vdisplay
% 9) && ((vdisplay
* 16 / 9) == hdisplay
))
219 else if (!(vdisplay
% 10) && ((vdisplay
* 16 / 10) == hdisplay
))
221 else if (!(vdisplay
% 4) && ((vdisplay
* 5 / 4) == hdisplay
))
223 else if (!(vdisplay
% 9) && ((vdisplay
* 15 / 9) == hdisplay
))
229 /* simplify the GTF calculation */
230 /* 4) Minimum time of vertical sync + back porch interval (µs)
234 #define CVT_MIN_VSYNC_BP 550
235 /* 3) Nominal HSync width (% of line period) - default 8 */
236 #define CVT_HSYNC_PERCENTAGE 8
237 unsigned int hblank_percentage
;
238 int vsyncandback_porch
, vback_porch
, hblank
;
240 /* estimated the horizontal period */
241 tmp1
= HV_FACTOR
* 1000000 -
242 CVT_MIN_VSYNC_BP
* HV_FACTOR
* vfieldrate
;
243 tmp2
= (vdisplay_rnd
+ 2 * vmargin
+ CVT_MIN_V_PORCH
) * 2 +
245 hperiod
= tmp1
* 2 / (tmp2
* vfieldrate
);
247 tmp1
= CVT_MIN_VSYNC_BP
* HV_FACTOR
/ hperiod
+ 1;
248 /* 9. Find number of lines in sync + backporch */
249 if (tmp1
< (vsync
+ CVT_MIN_V_PORCH
))
250 vsyncandback_porch
= vsync
+ CVT_MIN_V_PORCH
;
252 vsyncandback_porch
= tmp1
;
253 /* 10. Find number of lines in back porch */
254 vback_porch
= vsyncandback_porch
- vsync
;
255 drm_mode
->vtotal
= vdisplay_rnd
+ 2 * vmargin
+
256 vsyncandback_porch
+ CVT_MIN_V_PORCH
;
257 /* 5) Definition of Horizontal blanking time limitation */
258 /* Gradient (%/kHz) - default 600 */
259 #define CVT_M_FACTOR 600
260 /* Offset (%) - default 40 */
261 #define CVT_C_FACTOR 40
262 /* Blanking time scaling factor - default 128 */
263 #define CVT_K_FACTOR 128
264 /* Scaling factor weighting - default 20 */
265 #define CVT_J_FACTOR 20
266 #define CVT_M_PRIME (CVT_M_FACTOR * CVT_K_FACTOR / 256)
267 #define CVT_C_PRIME ((CVT_C_FACTOR - CVT_J_FACTOR) * CVT_K_FACTOR / 256 + \
269 /* 12. Find ideal blanking duty cycle from formula */
270 hblank_percentage
= CVT_C_PRIME
* HV_FACTOR
- CVT_M_PRIME
*
272 /* 13. Blanking time */
273 if (hblank_percentage
< 20 * HV_FACTOR
)
274 hblank_percentage
= 20 * HV_FACTOR
;
275 hblank
= drm_mode
->hdisplay
* hblank_percentage
/
276 (100 * HV_FACTOR
- hblank_percentage
);
277 hblank
-= hblank
% (2 * CVT_H_GRANULARITY
);
278 /* 14. find the total pixes per line */
279 drm_mode
->htotal
= drm_mode
->hdisplay
+ hblank
;
280 drm_mode
->hsync_end
= drm_mode
->hdisplay
+ hblank
/ 2;
281 drm_mode
->hsync_start
= drm_mode
->hsync_end
-
282 (drm_mode
->htotal
* CVT_HSYNC_PERCENTAGE
) / 100;
283 drm_mode
->hsync_start
+= CVT_H_GRANULARITY
-
284 drm_mode
->hsync_start
% CVT_H_GRANULARITY
;
285 /* fill the Vsync values */
286 drm_mode
->vsync_start
= drm_mode
->vdisplay
+ CVT_MIN_V_PORCH
;
287 drm_mode
->vsync_end
= drm_mode
->vsync_start
+ vsync
;
289 /* Reduced blanking */
290 /* Minimum vertical blanking interval time (µs)- default 460 */
291 #define CVT_RB_MIN_VBLANK 460
292 /* Fixed number of clocks for horizontal sync */
293 #define CVT_RB_H_SYNC 32
294 /* Fixed number of clocks for horizontal blanking */
295 #define CVT_RB_H_BLANK 160
296 /* Fixed number of lines for vertical front porch - default 3*/
297 #define CVT_RB_VFPORCH 3
300 /* 8. Estimate Horizontal period. */
301 tmp1
= HV_FACTOR
* 1000000 -
302 CVT_RB_MIN_VBLANK
* HV_FACTOR
* vfieldrate
;
303 tmp2
= vdisplay_rnd
+ 2 * vmargin
;
304 hperiod
= tmp1
/ (tmp2
* vfieldrate
);
305 /* 9. Find number of lines in vertical blanking */
306 vbilines
= CVT_RB_MIN_VBLANK
* HV_FACTOR
/ hperiod
+ 1;
307 /* 10. Check if vertical blanking is sufficient */
308 if (vbilines
< (CVT_RB_VFPORCH
+ vsync
+ CVT_MIN_V_BPORCH
))
309 vbilines
= CVT_RB_VFPORCH
+ vsync
+ CVT_MIN_V_BPORCH
;
310 /* 11. Find total number of lines in vertical field */
311 drm_mode
->vtotal
= vdisplay_rnd
+ 2 * vmargin
+ vbilines
;
312 /* 12. Find total number of pixels in a line */
313 drm_mode
->htotal
= drm_mode
->hdisplay
+ CVT_RB_H_BLANK
;
314 /* Fill in HSync values */
315 drm_mode
->hsync_end
= drm_mode
->hdisplay
+ CVT_RB_H_BLANK
/ 2;
316 drm_mode
->hsync_start
= drm_mode
->hsync_end
- CVT_RB_H_SYNC
;
317 /* Fill in VSync values */
318 drm_mode
->vsync_start
= drm_mode
->vdisplay
+ CVT_RB_VFPORCH
;
319 drm_mode
->vsync_end
= drm_mode
->vsync_start
+ vsync
;
321 /* 15/13. Find pixel clock frequency (kHz for xf86) */
322 drm_mode
->clock
= drm_mode
->htotal
* HV_FACTOR
* 1000 / hperiod
;
323 drm_mode
->clock
-= drm_mode
->clock
% CVT_CLOCK_STEP
;
324 /* 18/16. Find actual vertical frame frequency */
325 /* ignore - just set the mode flag for interlaced */
327 drm_mode
->vtotal
*= 2;
328 drm_mode
->flags
|= DRM_MODE_FLAG_INTERLACE
;
330 /* Fill the mode line name */
331 drm_mode_set_name(drm_mode
);
333 drm_mode
->flags
|= (DRM_MODE_FLAG_PHSYNC
|
334 DRM_MODE_FLAG_NVSYNC
);
336 drm_mode
->flags
|= (DRM_MODE_FLAG_PVSYNC
|
337 DRM_MODE_FLAG_NHSYNC
);
341 EXPORT_SYMBOL(drm_cvt_mode
);
344 * drm_gtf_mode_complex - create the modeline based on the full GTF algorithm
346 * @hdisplay: hdisplay size
347 * @vdisplay: vdisplay size
348 * @vrefresh: vrefresh rate.
349 * @interlaced: whether to compute an interlaced mode
350 * @margins: desired margin (borders) size
351 * @GTF_M: extended GTF formula parameters
352 * @GTF_2C: extended GTF formula parameters
353 * @GTF_K: extended GTF formula parameters
354 * @GTF_2J: extended GTF formula parameters
356 * GTF feature blocks specify C and J in multiples of 0.5, so we pass them
357 * in here multiplied by two. For a C of 40, pass in 80.
360 * The modeline based on the full GTF algorithm stored in a drm_display_mode object.
361 * The display mode object is allocated with drm_mode_create(). Returns NULL
362 * when no mode could be allocated.
364 struct drm_display_mode
*
365 drm_gtf_mode_complex(struct drm_device
*dev
, int hdisplay
, int vdisplay
,
366 int vrefresh
, bool interlaced
, int margins
,
367 int GTF_M
, int GTF_2C
, int GTF_K
, int GTF_2J
)
368 { /* 1) top/bottom margin size (% of height) - default: 1.8, */
369 #define GTF_MARGIN_PERCENTAGE 18
370 /* 2) character cell horizontal granularity (pixels) - default 8 */
371 #define GTF_CELL_GRAN 8
372 /* 3) Minimum vertical porch (lines) - default 3 */
373 #define GTF_MIN_V_PORCH 1
374 /* width of vsync in lines */
376 /* width of hsync as % of total line */
377 #define H_SYNC_PERCENT 8
378 /* min time of vsync + back porch (microsec) */
379 #define MIN_VSYNC_PLUS_BP 550
380 /* C' and M' are part of the Blanking Duty Cycle computation */
381 #define GTF_C_PRIME ((((GTF_2C - GTF_2J) * GTF_K / 256) + GTF_2J) / 2)
382 #define GTF_M_PRIME (GTF_K * GTF_M / 256)
383 struct drm_display_mode
*drm_mode
;
384 unsigned int hdisplay_rnd
, vdisplay_rnd
, vfieldrate_rqd
;
385 int top_margin
, bottom_margin
;
387 unsigned int hfreq_est
;
388 int vsync_plus_bp
, vback_porch
;
389 unsigned int vtotal_lines
, vfieldrate_est
, hperiod
;
390 unsigned int vfield_rate
, vframe_rate
;
391 int left_margin
, right_margin
;
392 unsigned int total_active_pixels
, ideal_duty_cycle
;
393 unsigned int hblank
, total_pixels
, pixel_freq
;
394 int hsync
, hfront_porch
, vodd_front_porch_lines
;
395 unsigned int tmp1
, tmp2
;
397 drm_mode
= drm_mode_create(dev
);
401 /* 1. In order to give correct results, the number of horizontal
402 * pixels requested is first processed to ensure that it is divisible
403 * by the character size, by rounding it to the nearest character
406 hdisplay_rnd
= (hdisplay
+ GTF_CELL_GRAN
/ 2) / GTF_CELL_GRAN
;
407 hdisplay_rnd
= hdisplay_rnd
* GTF_CELL_GRAN
;
409 /* 2. If interlace is requested, the number of vertical lines assumed
410 * by the calculation must be halved, as the computation calculates
411 * the number of vertical lines per field.
414 vdisplay_rnd
= vdisplay
/ 2;
416 vdisplay_rnd
= vdisplay
;
418 /* 3. Find the frame rate required: */
420 vfieldrate_rqd
= vrefresh
* 2;
422 vfieldrate_rqd
= vrefresh
;
424 /* 4. Find number of lines in Top margin: */
427 top_margin
= (vdisplay_rnd
* GTF_MARGIN_PERCENTAGE
+ 500) /
429 /* 5. Find number of lines in bottom margin: */
430 bottom_margin
= top_margin
;
432 /* 6. If interlace is required, then set variable interlace: */
438 /* 7. Estimate the Horizontal frequency */
440 tmp1
= (1000000 - MIN_VSYNC_PLUS_BP
* vfieldrate_rqd
) / 500;
441 tmp2
= (vdisplay_rnd
+ 2 * top_margin
+ GTF_MIN_V_PORCH
) *
443 hfreq_est
= (tmp2
* 1000 * vfieldrate_rqd
) / tmp1
;
446 /* 8. Find the number of lines in V sync + back porch */
447 /* [V SYNC+BP] = RINT(([MIN VSYNC+BP] * hfreq_est / 1000000)) */
448 vsync_plus_bp
= MIN_VSYNC_PLUS_BP
* hfreq_est
/ 1000;
449 vsync_plus_bp
= (vsync_plus_bp
+ 500) / 1000;
450 /* 9. Find the number of lines in V back porch alone: */
451 vback_porch
= vsync_plus_bp
- V_SYNC_RQD
;
452 /* 10. Find the total number of lines in Vertical field period: */
453 vtotal_lines
= vdisplay_rnd
+ top_margin
+ bottom_margin
+
454 vsync_plus_bp
+ GTF_MIN_V_PORCH
;
455 /* 11. Estimate the Vertical field frequency: */
456 vfieldrate_est
= hfreq_est
/ vtotal_lines
;
457 /* 12. Find the actual horizontal period: */
458 hperiod
= 1000000 / (vfieldrate_rqd
* vtotal_lines
);
460 /* 13. Find the actual Vertical field frequency: */
461 vfield_rate
= hfreq_est
/ vtotal_lines
;
462 /* 14. Find the Vertical frame frequency: */
464 vframe_rate
= vfield_rate
/ 2;
466 vframe_rate
= vfield_rate
;
467 /* 15. Find number of pixels in left margin: */
469 left_margin
= (hdisplay_rnd
* GTF_MARGIN_PERCENTAGE
+ 500) /
474 /* 16.Find number of pixels in right margin: */
475 right_margin
= left_margin
;
476 /* 17.Find total number of active pixels in image and left and right */
477 total_active_pixels
= hdisplay_rnd
+ left_margin
+ right_margin
;
478 /* 18.Find the ideal blanking duty cycle from blanking duty cycle */
479 ideal_duty_cycle
= GTF_C_PRIME
* 1000 -
480 (GTF_M_PRIME
* 1000000 / hfreq_est
);
481 /* 19.Find the number of pixels in the blanking time to the nearest
482 * double character cell: */
483 hblank
= total_active_pixels
* ideal_duty_cycle
/
484 (100000 - ideal_duty_cycle
);
485 hblank
= (hblank
+ GTF_CELL_GRAN
) / (2 * GTF_CELL_GRAN
);
486 hblank
= hblank
* 2 * GTF_CELL_GRAN
;
487 /* 20.Find total number of pixels: */
488 total_pixels
= total_active_pixels
+ hblank
;
489 /* 21.Find pixel clock frequency: */
490 pixel_freq
= total_pixels
* hfreq_est
/ 1000;
491 /* Stage 1 computations are now complete; I should really pass
492 * the results to another function and do the Stage 2 computations,
493 * but I only need a few more values so I'll just append the
494 * computations here for now */
495 /* 17. Find the number of pixels in the horizontal sync period: */
496 hsync
= H_SYNC_PERCENT
* total_pixels
/ 100;
497 hsync
= (hsync
+ GTF_CELL_GRAN
/ 2) / GTF_CELL_GRAN
;
498 hsync
= hsync
* GTF_CELL_GRAN
;
499 /* 18. Find the number of pixels in horizontal front porch period */
500 hfront_porch
= hblank
/ 2 - hsync
;
501 /* 36. Find the number of lines in the odd front porch period: */
502 vodd_front_porch_lines
= GTF_MIN_V_PORCH
;
504 /* finally, pack the results in the mode struct */
505 drm_mode
->hdisplay
= hdisplay_rnd
;
506 drm_mode
->hsync_start
= hdisplay_rnd
+ hfront_porch
;
507 drm_mode
->hsync_end
= drm_mode
->hsync_start
+ hsync
;
508 drm_mode
->htotal
= total_pixels
;
509 drm_mode
->vdisplay
= vdisplay_rnd
;
510 drm_mode
->vsync_start
= vdisplay_rnd
+ vodd_front_porch_lines
;
511 drm_mode
->vsync_end
= drm_mode
->vsync_start
+ V_SYNC_RQD
;
512 drm_mode
->vtotal
= vtotal_lines
;
514 drm_mode
->clock
= pixel_freq
;
517 drm_mode
->vtotal
*= 2;
518 drm_mode
->flags
|= DRM_MODE_FLAG_INTERLACE
;
521 drm_mode_set_name(drm_mode
);
522 if (GTF_M
== 600 && GTF_2C
== 80 && GTF_K
== 128 && GTF_2J
== 40)
523 drm_mode
->flags
= DRM_MODE_FLAG_NHSYNC
| DRM_MODE_FLAG_PVSYNC
;
525 drm_mode
->flags
= DRM_MODE_FLAG_PHSYNC
| DRM_MODE_FLAG_NVSYNC
;
529 EXPORT_SYMBOL(drm_gtf_mode_complex
);
532 * drm_gtf_mode - create the modeline based on the GTF algorithm
534 * @hdisplay: hdisplay size
535 * @vdisplay: vdisplay size
536 * @vrefresh: vrefresh rate.
537 * @interlaced: whether to compute an interlaced mode
538 * @margins: desired margin (borders) size
540 * return the modeline based on GTF algorithm
542 * This function is to create the modeline based on the GTF algorithm.
543 * Generalized Timing Formula is derived from:
544 * GTF Spreadsheet by Andy Morrish (1/5/97)
545 * available at http://www.vesa.org
547 * And it is copied from the file of xserver/hw/xfree86/modes/xf86gtf.c.
548 * What I have done is to translate it by using integer calculation.
549 * I also refer to the function of fb_get_mode in the file of
550 * drivers/video/fbmon.c
552 * Standard GTF parameters:
559 * The modeline based on the GTF algorithm stored in a drm_display_mode object.
560 * The display mode object is allocated with drm_mode_create(). Returns NULL
561 * when no mode could be allocated.
563 struct drm_display_mode
*
564 drm_gtf_mode(struct drm_device
*dev
, int hdisplay
, int vdisplay
, int vrefresh
,
565 bool interlaced
, int margins
)
567 return drm_gtf_mode_complex(dev
, hdisplay
, vdisplay
, vrefresh
,
569 600, 40 * 2, 128, 20 * 2);
571 EXPORT_SYMBOL(drm_gtf_mode
);
573 #ifdef CONFIG_VIDEOMODE_HELPERS
575 * drm_display_mode_from_videomode - fill in @dmode using @vm,
576 * @vm: videomode structure to use as source
577 * @dmode: drm_display_mode structure to use as destination
579 * Fills out @dmode using the display mode specified in @vm.
581 void drm_display_mode_from_videomode(const struct videomode
*vm
,
582 struct drm_display_mode
*dmode
)
584 dmode
->hdisplay
= vm
->hactive
;
585 dmode
->hsync_start
= dmode
->hdisplay
+ vm
->hfront_porch
;
586 dmode
->hsync_end
= dmode
->hsync_start
+ vm
->hsync_len
;
587 dmode
->htotal
= dmode
->hsync_end
+ vm
->hback_porch
;
589 dmode
->vdisplay
= vm
->vactive
;
590 dmode
->vsync_start
= dmode
->vdisplay
+ vm
->vfront_porch
;
591 dmode
->vsync_end
= dmode
->vsync_start
+ vm
->vsync_len
;
592 dmode
->vtotal
= dmode
->vsync_end
+ vm
->vback_porch
;
594 dmode
->clock
= vm
->pixelclock
/ 1000;
597 if (vm
->flags
& DISPLAY_FLAGS_HSYNC_HIGH
)
598 dmode
->flags
|= DRM_MODE_FLAG_PHSYNC
;
599 else if (vm
->flags
& DISPLAY_FLAGS_HSYNC_LOW
)
600 dmode
->flags
|= DRM_MODE_FLAG_NHSYNC
;
601 if (vm
->flags
& DISPLAY_FLAGS_VSYNC_HIGH
)
602 dmode
->flags
|= DRM_MODE_FLAG_PVSYNC
;
603 else if (vm
->flags
& DISPLAY_FLAGS_VSYNC_LOW
)
604 dmode
->flags
|= DRM_MODE_FLAG_NVSYNC
;
605 if (vm
->flags
& DISPLAY_FLAGS_INTERLACED
)
606 dmode
->flags
|= DRM_MODE_FLAG_INTERLACE
;
607 if (vm
->flags
& DISPLAY_FLAGS_DOUBLESCAN
)
608 dmode
->flags
|= DRM_MODE_FLAG_DBLSCAN
;
609 if (vm
->flags
& DISPLAY_FLAGS_DOUBLECLK
)
610 dmode
->flags
|= DRM_MODE_FLAG_DBLCLK
;
611 drm_mode_set_name(dmode
);
616 * of_get_drm_display_mode - get a drm_display_mode from devicetree
617 * @np: device_node with the timing specification
618 * @dmode: will be set to the return value
619 * @index: index into the list of display timings in devicetree
621 * This function is expensive and should only be used, if only one mode is to be
622 * read from DT. To get multiple modes start with of_get_display_timings and
623 * work with that instead.
626 * 0 on success, a negative errno code when no of videomode node was found.
628 int of_get_drm_display_mode(struct device_node
*np
,
629 struct drm_display_mode
*dmode
, int index
)
634 ret
= of_get_videomode(np
, &vm
, index
);
638 drm_display_mode_from_videomode(&vm
, dmode
);
640 pr_debug("%s: got %dx%d display mode from %s\n",
641 of_node_full_name(np
), vm
.hactive
, vm
.vactive
, np
->name
);
642 drm_mode_debug_printmodeline(dmode
);
646 #endif /* CONFIG_OF */
647 #endif /* CONFIG_VIDEOMODE_HELPERS */
650 * drm_mode_set_name - set the name on a mode
651 * @mode: name will be set in this mode
653 * Set the name of @mode to a standard format which is <hdisplay>x<vdisplay>
654 * with an optional 'i' suffix for interlaced modes.
656 void drm_mode_set_name(struct drm_display_mode
*mode
)
658 bool interlaced
= !!(mode
->flags
& DRM_MODE_FLAG_INTERLACE
);
660 ksnprintf(mode
->name
, DRM_DISPLAY_MODE_LEN
, "%dx%d%s",
661 mode
->hdisplay
, mode
->vdisplay
,
662 interlaced
? "i" : "");
664 EXPORT_SYMBOL(drm_mode_set_name
);
666 /** drm_mode_hsync - get the hsync of a mode
670 * @modes's hsync rate in kHz, rounded to the nearest integer. Calculates the
671 * value first if it is not yet set.
673 int drm_mode_hsync(const struct drm_display_mode
*mode
)
675 unsigned int calc_val
;
680 if (mode
->htotal
< 0)
683 calc_val
= (mode
->clock
* 1000) / mode
->htotal
; /* hsync in Hz */
684 calc_val
+= 500; /* round to 1000Hz */
685 calc_val
/= 1000; /* truncate to kHz */
689 EXPORT_SYMBOL(drm_mode_hsync
);
692 * drm_mode_vrefresh - get the vrefresh of a mode
696 * @modes's vrefresh rate in Hz, rounded to the nearest integer. Calculates the
697 * value first if it is not yet set.
699 int drm_mode_vrefresh(const struct drm_display_mode
*mode
)
702 unsigned int calc_val
;
704 if (mode
->vrefresh
> 0)
705 refresh
= mode
->vrefresh
;
706 else if (mode
->htotal
> 0 && mode
->vtotal
> 0) {
708 vtotal
= mode
->vtotal
;
709 /* work out vrefresh the value will be x1000 */
710 calc_val
= (mode
->clock
* 1000);
711 calc_val
/= mode
->htotal
;
712 refresh
= (calc_val
+ vtotal
/ 2) / vtotal
;
714 if (mode
->flags
& DRM_MODE_FLAG_INTERLACE
)
716 if (mode
->flags
& DRM_MODE_FLAG_DBLSCAN
)
719 refresh
/= mode
->vscan
;
723 EXPORT_SYMBOL(drm_mode_vrefresh
);
726 * drm_mode_set_crtcinfo - set CRTC modesetting timing parameters
728 * @adjust_flags: a combination of adjustment flags
730 * Setup the CRTC modesetting timing parameters for @p, adjusting if necessary.
732 * - The CRTC_INTERLACE_HALVE_V flag can be used to halve vertical timings of
734 * - The CRTC_STEREO_DOUBLE flag can be used to compute the timings for
735 * buffers containing two eyes (only adjust the timings when needed, eg. for
736 * "frame packing" or "side by side full").
738 void drm_mode_set_crtcinfo(struct drm_display_mode
*p
, int adjust_flags
)
740 if ((p
== NULL
) || ((p
->type
& DRM_MODE_TYPE_CRTC_C
) == DRM_MODE_TYPE_BUILTIN
))
743 p
->crtc_clock
= p
->clock
;
744 p
->crtc_hdisplay
= p
->hdisplay
;
745 p
->crtc_hsync_start
= p
->hsync_start
;
746 p
->crtc_hsync_end
= p
->hsync_end
;
747 p
->crtc_htotal
= p
->htotal
;
748 p
->crtc_hskew
= p
->hskew
;
749 p
->crtc_vdisplay
= p
->vdisplay
;
750 p
->crtc_vsync_start
= p
->vsync_start
;
751 p
->crtc_vsync_end
= p
->vsync_end
;
752 p
->crtc_vtotal
= p
->vtotal
;
754 if (p
->flags
& DRM_MODE_FLAG_INTERLACE
) {
755 if (adjust_flags
& CRTC_INTERLACE_HALVE_V
) {
756 p
->crtc_vdisplay
/= 2;
757 p
->crtc_vsync_start
/= 2;
758 p
->crtc_vsync_end
/= 2;
763 if (p
->flags
& DRM_MODE_FLAG_DBLSCAN
) {
764 p
->crtc_vdisplay
*= 2;
765 p
->crtc_vsync_start
*= 2;
766 p
->crtc_vsync_end
*= 2;
771 p
->crtc_vdisplay
*= p
->vscan
;
772 p
->crtc_vsync_start
*= p
->vscan
;
773 p
->crtc_vsync_end
*= p
->vscan
;
774 p
->crtc_vtotal
*= p
->vscan
;
777 if (adjust_flags
& CRTC_STEREO_DOUBLE
) {
778 unsigned int layout
= p
->flags
& DRM_MODE_FLAG_3D_MASK
;
781 case DRM_MODE_FLAG_3D_FRAME_PACKING
:
783 p
->crtc_vdisplay
+= p
->crtc_vtotal
;
784 p
->crtc_vsync_start
+= p
->crtc_vtotal
;
785 p
->crtc_vsync_end
+= p
->crtc_vtotal
;
786 p
->crtc_vtotal
+= p
->crtc_vtotal
;
791 p
->crtc_vblank_start
= min(p
->crtc_vsync_start
, p
->crtc_vdisplay
);
792 p
->crtc_vblank_end
= max(p
->crtc_vsync_end
, p
->crtc_vtotal
);
793 p
->crtc_hblank_start
= min(p
->crtc_hsync_start
, p
->crtc_hdisplay
);
794 p
->crtc_hblank_end
= max(p
->crtc_hsync_end
, p
->crtc_htotal
);
796 EXPORT_SYMBOL(drm_mode_set_crtcinfo
);
799 * drm_mode_copy - copy the mode
800 * @dst: mode to overwrite
803 * Copy an existing mode into another mode, preserving the object id and
804 * list head of the destination mode.
806 void drm_mode_copy(struct drm_display_mode
*dst
, const struct drm_display_mode
*src
)
808 int id
= dst
->base
.id
;
809 struct list_head head
= dst
->head
;
815 EXPORT_SYMBOL(drm_mode_copy
);
818 * drm_mode_duplicate - allocate and duplicate an existing mode
819 * @dev: drm_device to allocate the duplicated mode for
820 * @mode: mode to duplicate
822 * Just allocate a new mode, copy the existing mode into it, and return
823 * a pointer to it. Used to create new instances of established modes.
826 * Pointer to duplicated mode on success, NULL on error.
828 struct drm_display_mode
*drm_mode_duplicate(struct drm_device
*dev
,
829 const struct drm_display_mode
*mode
)
831 struct drm_display_mode
*nmode
;
833 nmode
= drm_mode_create(dev
);
837 drm_mode_copy(nmode
, mode
);
841 EXPORT_SYMBOL(drm_mode_duplicate
);
844 * drm_mode_equal - test modes for equality
846 * @mode2: second mode
848 * Check to see if @mode1 and @mode2 are equivalent.
851 * True if the modes are equal, false otherwise.
853 bool drm_mode_equal(const struct drm_display_mode
*mode1
, const struct drm_display_mode
*mode2
)
855 /* do clock check convert to PICOS so fb modes get matched
857 if (mode1
->clock
&& mode2
->clock
) {
858 if (KHZ2PICOS(mode1
->clock
) != KHZ2PICOS(mode2
->clock
))
860 } else if (mode1
->clock
!= mode2
->clock
)
863 if ((mode1
->flags
& DRM_MODE_FLAG_3D_MASK
) !=
864 (mode2
->flags
& DRM_MODE_FLAG_3D_MASK
))
867 return drm_mode_equal_no_clocks_no_stereo(mode1
, mode2
);
869 EXPORT_SYMBOL(drm_mode_equal
);
872 * drm_mode_equal_no_clocks_no_stereo - test modes for equality
874 * @mode2: second mode
876 * Check to see if @mode1 and @mode2 are equivalent, but
877 * don't check the pixel clocks nor the stereo layout.
880 * True if the modes are equal, false otherwise.
882 bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode
*mode1
,
883 const struct drm_display_mode
*mode2
)
885 if (mode1
->hdisplay
== mode2
->hdisplay
&&
886 mode1
->hsync_start
== mode2
->hsync_start
&&
887 mode1
->hsync_end
== mode2
->hsync_end
&&
888 mode1
->htotal
== mode2
->htotal
&&
889 mode1
->hskew
== mode2
->hskew
&&
890 mode1
->vdisplay
== mode2
->vdisplay
&&
891 mode1
->vsync_start
== mode2
->vsync_start
&&
892 mode1
->vsync_end
== mode2
->vsync_end
&&
893 mode1
->vtotal
== mode2
->vtotal
&&
894 mode1
->vscan
== mode2
->vscan
&&
895 (mode1
->flags
& ~DRM_MODE_FLAG_3D_MASK
) ==
896 (mode2
->flags
& ~DRM_MODE_FLAG_3D_MASK
))
901 EXPORT_SYMBOL(drm_mode_equal_no_clocks_no_stereo
);
904 * drm_mode_validate_size - make sure modes adhere to size constraints
906 * @mode_list: list of modes to check
907 * @maxX: maximum width
908 * @maxY: maximum height
910 * This function is a helper which can be used to validate modes against size
911 * limitations of the DRM device/connector. If a mode is too big its status
912 * memeber is updated with the appropriate validation failure code. The list
913 * itself is not changed.
915 void drm_mode_validate_size(struct drm_device
*dev
,
916 struct list_head
*mode_list
,
919 struct drm_display_mode
*mode
;
921 list_for_each_entry(mode
, mode_list
, head
) {
922 if (maxX
> 0 && mode
->hdisplay
> maxX
)
923 mode
->status
= MODE_VIRTUAL_X
;
925 if (maxY
> 0 && mode
->vdisplay
> maxY
)
926 mode
->status
= MODE_VIRTUAL_Y
;
929 EXPORT_SYMBOL(drm_mode_validate_size
);
932 * drm_mode_prune_invalid - remove invalid modes from mode list
934 * @mode_list: list of modes to check
935 * @verbose: be verbose about it
937 * This helper function can be used to prune a display mode list after
938 * validation has been completed. All modes who's status is not MODE_OK will be
939 * removed from the list, and if @verbose the status code and mode name is also
942 void drm_mode_prune_invalid(struct drm_device
*dev
,
943 struct list_head
*mode_list
, bool verbose
)
945 struct drm_display_mode
*mode
, *t
;
947 list_for_each_entry_safe(mode
, t
, mode_list
, head
) {
948 if (mode
->status
!= MODE_OK
) {
949 list_del(&mode
->head
);
951 drm_mode_debug_printmodeline(mode
);
952 DRM_DEBUG_KMS("Not using %s mode %d\n",
953 mode
->name
, mode
->status
);
955 drm_mode_destroy(dev
, mode
);
959 EXPORT_SYMBOL(drm_mode_prune_invalid
);
962 * drm_mode_compare - compare modes for favorability
964 * @lh_a: list_head for first mode
965 * @lh_b: list_head for second mode
967 * Compare two modes, given by @lh_a and @lh_b, returning a value indicating
971 * Negative if @lh_a is better than @lh_b, zero if they're equivalent, or
972 * positive if @lh_b is better than @lh_a.
974 static int drm_mode_compare(void *priv
, struct list_head
*lh_a
, struct list_head
*lh_b
)
976 struct drm_display_mode
*a
= list_entry(lh_a
, struct drm_display_mode
, head
);
977 struct drm_display_mode
*b
= list_entry(lh_b
, struct drm_display_mode
, head
);
980 diff
= ((b
->type
& DRM_MODE_TYPE_PREFERRED
) != 0) -
981 ((a
->type
& DRM_MODE_TYPE_PREFERRED
) != 0);
984 diff
= b
->hdisplay
* b
->vdisplay
- a
->hdisplay
* a
->vdisplay
;
988 diff
= b
->vrefresh
- a
->vrefresh
;
992 diff
= b
->clock
- a
->clock
;
997 * drm_mode_sort - sort mode list
998 * @mode_list: list of drm_display_mode structures to sort
1000 * Sort @mode_list by favorability, moving good modes to the head of the list.
1002 void drm_mode_sort(struct list_head
*mode_list
)
1004 drm_list_sort(NULL
, mode_list
, drm_mode_compare
);
1006 EXPORT_SYMBOL(drm_mode_sort
);
1009 * drm_mode_connector_list_update - update the mode list for the connector
1010 * @connector: the connector to update
1011 * @merge_type_bits: whether to merge or overright type bits.
1013 * This moves the modes from the @connector probed_modes list
1014 * to the actual mode list. It compares the probed mode against the current
1015 * list and only adds different/new modes.
1017 * This is just a helper functions doesn't validate any modes itself and also
1018 * doesn't prune any invalid modes. Callers need to do that themselves.
1020 void drm_mode_connector_list_update(struct drm_connector
*connector
,
1021 bool merge_type_bits
)
1023 struct drm_display_mode
*mode
;
1024 struct drm_display_mode
*pmode
, *pt
;
1027 WARN_ON(!mutex_is_locked(&connector
->dev
->mode_config
.mutex
));
1029 list_for_each_entry_safe(pmode
, pt
, &connector
->probed_modes
,
1032 /* go through current modes checking for the new probed mode */
1033 list_for_each_entry(mode
, &connector
->modes
, head
) {
1034 if (drm_mode_equal(pmode
, mode
)) {
1036 /* if equal delete the probed mode */
1037 mode
->status
= pmode
->status
;
1038 /* Merge type bits together */
1039 if (merge_type_bits
)
1040 mode
->type
|= pmode
->type
;
1042 mode
->type
= pmode
->type
;
1043 list_del(&pmode
->head
);
1044 drm_mode_destroy(connector
->dev
, pmode
);
1050 list_move_tail(&pmode
->head
, &connector
->modes
);
1054 EXPORT_SYMBOL(drm_mode_connector_list_update
);
1057 * drm_mode_parse_command_line_for_connector - parse command line modeline for connector
1058 * @mode_option: optional per connector mode option
1059 * @connector: connector to parse modeline for
1060 * @mode: preallocated drm_cmdline_mode structure to fill out
1062 * This parses @mode_option command line modeline for modes and options to
1063 * configure the connector. If @mode_option is NULL the default command line
1064 * modeline in fb_mode_option will be parsed instead.
1066 * This uses the same parameters as the fb modedb.c, except for an extra
1067 * force-enable, force-enable-digital and force-disable bit at the end:
1069 * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd]
1071 * The intermediate drm_cmdline_mode structure is required to store additional
1072 * options from the command line modline like the force-enabel/disable flag.
1075 * True if a valid modeline has been parsed, false otherwise.
1077 bool drm_mode_parse_command_line_for_connector(const char *mode_option
,
1078 struct drm_connector
*connector
,
1079 struct drm_cmdline_mode
*mode
)
1082 unsigned int namelen
;
1083 bool res_specified
= false, bpp_specified
= false, refresh_specified
= false;
1084 unsigned int xres
= 0, yres
= 0, bpp
= 32, refresh
= 0;
1085 bool yres_specified
= false, cvt
= false, rb
= false;
1086 bool interlace
= false, margins
= false, was_digit
= false;
1088 enum drm_connector_force force
= DRM_FORCE_UNSPECIFIED
;
1092 mode_option
= fb_mode_option
;
1096 mode
->specified
= false;
1101 namelen
= strlen(name
);
1102 for (i
= namelen
-1; i
>= 0; i
--) {
1105 if (!refresh_specified
&& !bpp_specified
&&
1106 !yres_specified
&& !cvt
&& !rb
&& was_digit
) {
1107 refresh
= simple_strtol(&name
[i
+1], NULL
, 10);
1108 refresh_specified
= true;
1114 if (!bpp_specified
&& !yres_specified
&& !cvt
&&
1116 bpp
= simple_strtol(&name
[i
+1], NULL
, 10);
1117 bpp_specified
= true;
1123 if (!yres_specified
&& was_digit
) {
1124 yres
= simple_strtol(&name
[i
+1], NULL
, 10);
1125 yres_specified
= true;
1134 if (yres_specified
|| cvt
|| was_digit
)
1139 if (yres_specified
|| cvt
|| rb
|| was_digit
)
1144 if (cvt
|| yres_specified
|| was_digit
)
1149 if (cvt
|| yres_specified
|| was_digit
)
1154 if (yres_specified
|| bpp_specified
|| refresh_specified
||
1155 was_digit
|| (force
!= DRM_FORCE_UNSPECIFIED
))
1158 force
= DRM_FORCE_ON
;
1161 if (yres_specified
|| bpp_specified
|| refresh_specified
||
1162 was_digit
|| (force
!= DRM_FORCE_UNSPECIFIED
))
1165 if ((connector
->connector_type
!= DRM_MODE_CONNECTOR_DVII
) &&
1166 (connector
->connector_type
!= DRM_MODE_CONNECTOR_HDMIB
))
1167 force
= DRM_FORCE_ON
;
1169 force
= DRM_FORCE_ON_DIGITAL
;
1172 if (yres_specified
|| bpp_specified
|| refresh_specified
||
1173 was_digit
|| (force
!= DRM_FORCE_UNSPECIFIED
))
1176 force
= DRM_FORCE_OFF
;
1183 if (i
< 0 && yres_specified
) {
1185 xres
= simple_strtol(name
, &ch
, 10);
1186 if ((ch
!= NULL
) && (*ch
== 'x'))
1187 res_specified
= true;
1190 } else if (!yres_specified
&& was_digit
) {
1191 /* catch mode that begins with digits but has no 'x' */
1197 "parse error at position %i in video mode '%s'\n",
1199 mode
->specified
= false;
1203 if (res_specified
) {
1204 mode
->specified
= true;
1209 if (refresh_specified
) {
1210 mode
->refresh_specified
= true;
1211 mode
->refresh
= refresh
;
1214 if (bpp_specified
) {
1215 mode
->bpp_specified
= true;
1220 mode
->interlace
= interlace
;
1221 mode
->margins
= margins
;
1222 mode
->force
= force
;
1226 EXPORT_SYMBOL(drm_mode_parse_command_line_for_connector
);
1229 * drm_mode_create_from_cmdline_mode - convert a command line modeline into a DRM display mode
1230 * @dev: DRM device to create the new mode for
1231 * @cmd: input command line modeline
1234 * Pointer to converted mode on success, NULL on error.
1236 struct drm_display_mode
*
1237 drm_mode_create_from_cmdline_mode(struct drm_device
*dev
,
1238 struct drm_cmdline_mode
*cmd
)
1240 struct drm_display_mode
*mode
;
1243 mode
= drm_cvt_mode(dev
,
1244 cmd
->xres
, cmd
->yres
,
1245 cmd
->refresh_specified
? cmd
->refresh
: 60,
1246 cmd
->rb
, cmd
->interlace
,
1249 mode
= drm_gtf_mode(dev
,
1250 cmd
->xres
, cmd
->yres
,
1251 cmd
->refresh_specified
? cmd
->refresh
: 60,
1257 drm_mode_set_crtcinfo(mode
, CRTC_INTERLACE_HALVE_V
);
1260 EXPORT_SYMBOL(drm_mode_create_from_cmdline_mode
);