blob: 1d9d4ca086a8fdf2b4a2f16251e8435a82ae44b9 [file] [log] [blame]
Dave Airlief453ba02008-11-07 14:05:41 -08001/*
Dave Airlief453ba02008-11-07 14:05:41 -08002 * Copyright © 1997-2003 by The XFree86 Project, Inc.
3 * Copyright © 2007 Dave Airlie
4 * Copyright © 2007-2008 Intel Corporation
5 * Jesse Barnes <jesse.barnes@intel.com>
Zhao Yakuid782c3f2009-06-22 13:17:08 +08006 * Copyright 2005-2006 Luc Verhaegen
Zhao Yakui26bbdad2009-06-22 13:17:09 +08007 * Copyright (c) 2001, Andy Ritger aritger@nvidia.com
Dave Airlief453ba02008-11-07 14:05:41 -08008 *
9 * Permission is hereby granted, free of charge, to any person obtaining a
10 * copy of this software and associated documentation files (the "Software"),
11 * to deal in the Software without restriction, including without limitation
12 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
13 * and/or sell copies of the Software, and to permit persons to whom the
14 * Software is furnished to do so, subject to the following conditions:
15 *
16 * The above copyright notice and this permission notice shall be included in
17 * all copies or substantial portions of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
23 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
24 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
25 * OTHER DEALINGS IN THE SOFTWARE.
26 *
27 * Except as contained in this notice, the name of the copyright holder(s)
28 * and author(s) shall not be used in advertising or otherwise to promote
29 * the sale, use or other dealings in this Software without prior written
30 * authorization from the copyright holder(s) and author(s).
31 */
32
33#include <linux/list.h>
Dave Chinner2c761272010-01-12 17:39:16 +110034#include <linux/list_sort.h>
Paul Gortmaker2d1a8a42011-08-30 18:16:33 -040035#include <linux/export.h>
David Howells760285e2012-10-02 18:01:07 +010036#include <drm/drmP.h>
37#include <drm/drm_crtc.h>
Steffen Trumtraredb37a92012-10-28 18:28:06 +010038#include <video/of_videomode.h>
Steffen Trumtrarebc64e42012-11-14 11:22:52 +010039#include <video/videomode.h>
Daniel Vetter55310002014-01-23 15:52:20 +010040#include <drm/drm_modes.h>
Dave Airlief453ba02008-11-07 14:05:41 -080041
Daniel Vetter8bd441b2014-01-23 15:35:24 +010042#include "drm_crtc_internal.h"
43
Dave Airlief453ba02008-11-07 14:05:41 -080044/**
Daniel Vetter3ec0db82014-01-23 15:06:15 +010045 * drm_mode_debug_printmodeline - print a mode to dmesg
Dave Airlief453ba02008-11-07 14:05:41 -080046 * @mode: mode to print
47 *
Dave Airlief453ba02008-11-07 14:05:41 -080048 * Describe @mode using DRM_DEBUG.
49 */
Ville Syrjälä0b3904a2012-10-25 18:05:05 +000050void drm_mode_debug_printmodeline(const struct drm_display_mode *mode)
Dave Airlief453ba02008-11-07 14:05:41 -080051{
Rob Clark65c7dc12016-11-05 11:08:06 -040052 DRM_DEBUG_KMS("Modeline " DRM_MODE_FMT "\n", DRM_MODE_ARG(mode));
Dave Airlief453ba02008-11-07 14:05:41 -080053}
54EXPORT_SYMBOL(drm_mode_debug_printmodeline);
55
56/**
Daniel Vetter8bd441b2014-01-23 15:35:24 +010057 * drm_mode_create - create a new display mode
58 * @dev: DRM device
59 *
Daniel Vetterf5aabb92014-01-23 20:05:00 +010060 * Create a new, cleared drm_display_mode with kzalloc, allocate an ID for it
61 * and return it.
Daniel Vetter8bd441b2014-01-23 15:35:24 +010062 *
Daniel Vetterf5aabb92014-01-23 20:05:00 +010063 * Returns:
Daniel Vetter8bd441b2014-01-23 15:35:24 +010064 * Pointer to new mode on success, NULL on error.
65 */
66struct drm_display_mode *drm_mode_create(struct drm_device *dev)
67{
68 struct drm_display_mode *nmode;
69
70 nmode = kzalloc(sizeof(struct drm_display_mode), GFP_KERNEL);
71 if (!nmode)
72 return NULL;
73
74 if (drm_mode_object_get(dev, &nmode->base, DRM_MODE_OBJECT_MODE)) {
75 kfree(nmode);
76 return NULL;
77 }
78
79 return nmode;
80}
81EXPORT_SYMBOL(drm_mode_create);
82
83/**
84 * drm_mode_destroy - remove a mode
85 * @dev: DRM device
86 * @mode: mode to remove
87 *
Daniel Vetterf5aabb92014-01-23 20:05:00 +010088 * Release @mode's unique ID, then free it @mode structure itself using kfree.
Daniel Vetter8bd441b2014-01-23 15:35:24 +010089 */
90void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode)
91{
92 if (!mode)
93 return;
94
Dave Airlie7c8f6d22016-04-15 15:10:32 +100095 drm_mode_object_unregister(dev, &mode->base);
Daniel Vetter8bd441b2014-01-23 15:35:24 +010096
97 kfree(mode);
98}
99EXPORT_SYMBOL(drm_mode_destroy);
100
101/**
Daniel Vetterf5aabb92014-01-23 20:05:00 +0100102 * drm_mode_probed_add - add a mode to a connector's probed_mode list
Daniel Vetter8bd441b2014-01-23 15:35:24 +0100103 * @connector: connector the new mode
104 * @mode: mode data
105 *
Daniel Vetterf5aabb92014-01-23 20:05:00 +0100106 * Add @mode to @connector's probed_mode list for later use. This list should
107 * then in a second step get filtered and all the modes actually supported by
108 * the hardware moved to the @connector's modes list.
Daniel Vetter8bd441b2014-01-23 15:35:24 +0100109 */
110void drm_mode_probed_add(struct drm_connector *connector,
111 struct drm_display_mode *mode)
112{
113 WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex));
114
115 list_add_tail(&mode->head, &connector->probed_modes);
116}
117EXPORT_SYMBOL(drm_mode_probed_add);
118
119/**
Daniel Vetterf5aabb92014-01-23 20:05:00 +0100120 * drm_cvt_mode -create a modeline based on the CVT algorithm
121 * @dev: drm device
Zhao Yakuid782c3f2009-06-22 13:17:08 +0800122 * @hdisplay: hdisplay size
123 * @vdisplay: vdisplay size
Daniel Vetterf5aabb92014-01-23 20:05:00 +0100124 * @vrefresh: vrefresh rate
125 * @reduced: whether to use reduced blanking
126 * @interlaced: whether to compute an interlaced mode
127 * @margins: whether to add margins (borders)
Zhao Yakuid782c3f2009-06-22 13:17:08 +0800128 *
129 * This function is called to generate the modeline based on CVT algorithm
130 * according to the hdisplay, vdisplay, vrefresh.
131 * It is based from the VESA(TM) Coordinated Video Timing Generator by
132 * Graham Loveridge April 9, 2003 available at
Justin P. Mattock631dd1a2010-10-18 11:03:14 +0200133 * http://www.elo.utfsm.cl/~elo212/docs/CVTd6r1.xls
Zhao Yakuid782c3f2009-06-22 13:17:08 +0800134 *
135 * And it is copied from xf86CVTmode in xserver/hw/xfree86/modes/xf86cvt.c.
136 * What I have done is to translate it by using integer calculation.
Daniel Vetterf5aabb92014-01-23 20:05:00 +0100137 *
138 * Returns:
139 * The modeline based on the CVT algorithm stored in a drm_display_mode object.
140 * The display mode object is allocated with drm_mode_create(). Returns NULL
141 * when no mode could be allocated.
Zhao Yakuid782c3f2009-06-22 13:17:08 +0800142 */
Zhao Yakuid782c3f2009-06-22 13:17:08 +0800143struct drm_display_mode *drm_cvt_mode(struct drm_device *dev, int hdisplay,
144 int vdisplay, int vrefresh,
Dave Airlied50ba252009-09-23 14:44:08 +1000145 bool reduced, bool interlaced, bool margins)
Zhao Yakuid782c3f2009-06-22 13:17:08 +0800146{
Daniel Vetter3ec0db82014-01-23 15:06:15 +0100147#define HV_FACTOR 1000
Zhao Yakuid782c3f2009-06-22 13:17:08 +0800148 /* 1) top/bottom margin size (% of height) - default: 1.8, */
149#define CVT_MARGIN_PERCENTAGE 18
150 /* 2) character cell horizontal granularity (pixels) - default 8 */
151#define CVT_H_GRANULARITY 8
152 /* 3) Minimum vertical porch (lines) - default 3 */
153#define CVT_MIN_V_PORCH 3
154 /* 4) Minimum number of vertical back porch lines - default 6 */
155#define CVT_MIN_V_BPORCH 6
156 /* Pixel Clock step (kHz) */
157#define CVT_CLOCK_STEP 250
158 struct drm_display_mode *drm_mode;
Zhao Yakuid782c3f2009-06-22 13:17:08 +0800159 unsigned int vfieldrate, hperiod;
160 int hdisplay_rnd, hmargin, vdisplay_rnd, vmargin, vsync;
161 int interlace;
Chris Wilson8a5bbf32016-10-21 15:15:40 +0100162 u64 tmp;
Zhao Yakuid782c3f2009-06-22 13:17:08 +0800163
164 /* allocate the drm_display_mode structure. If failure, we will
165 * return directly
166 */
167 drm_mode = drm_mode_create(dev);
168 if (!drm_mode)
169 return NULL;
170
171 /* the CVT default refresh rate is 60Hz */
172 if (!vrefresh)
173 vrefresh = 60;
174
175 /* the required field fresh rate */
176 if (interlaced)
177 vfieldrate = vrefresh * 2;
178 else
179 vfieldrate = vrefresh;
180
181 /* horizontal pixels */
182 hdisplay_rnd = hdisplay - (hdisplay % CVT_H_GRANULARITY);
183
184 /* determine the left&right borders */
185 hmargin = 0;
186 if (margins) {
187 hmargin = hdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000;
188 hmargin -= hmargin % CVT_H_GRANULARITY;
189 }
190 /* find the total active pixels */
191 drm_mode->hdisplay = hdisplay_rnd + 2 * hmargin;
192
193 /* find the number of lines per field */
194 if (interlaced)
195 vdisplay_rnd = vdisplay / 2;
196 else
197 vdisplay_rnd = vdisplay;
198
199 /* find the top & bottom borders */
200 vmargin = 0;
201 if (margins)
202 vmargin = vdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000;
203
Francisco Jerez841b4112009-08-12 02:30:09 +0200204 drm_mode->vdisplay = vdisplay + 2 * vmargin;
Zhao Yakuid782c3f2009-06-22 13:17:08 +0800205
206 /* Interlaced */
207 if (interlaced)
208 interlace = 1;
209 else
210 interlace = 0;
211
212 /* Determine VSync Width from aspect ratio */
213 if (!(vdisplay % 3) && ((vdisplay * 4 / 3) == hdisplay))
214 vsync = 4;
215 else if (!(vdisplay % 9) && ((vdisplay * 16 / 9) == hdisplay))
216 vsync = 5;
217 else if (!(vdisplay % 10) && ((vdisplay * 16 / 10) == hdisplay))
218 vsync = 6;
219 else if (!(vdisplay % 4) && ((vdisplay * 5 / 4) == hdisplay))
220 vsync = 7;
221 else if (!(vdisplay % 9) && ((vdisplay * 15 / 9) == hdisplay))
222 vsync = 7;
223 else /* custom */
224 vsync = 10;
225
226 if (!reduced) {
227 /* simplify the GTF calculation */
228 /* 4) Minimum time of vertical sync + back porch interval (µs)
229 * default 550.0
230 */
231 int tmp1, tmp2;
232#define CVT_MIN_VSYNC_BP 550
233 /* 3) Nominal HSync width (% of line period) - default 8 */
234#define CVT_HSYNC_PERCENTAGE 8
235 unsigned int hblank_percentage;
236 int vsyncandback_porch, vback_porch, hblank;
237
238 /* estimated the horizontal period */
239 tmp1 = HV_FACTOR * 1000000 -
240 CVT_MIN_VSYNC_BP * HV_FACTOR * vfieldrate;
241 tmp2 = (vdisplay_rnd + 2 * vmargin + CVT_MIN_V_PORCH) * 2 +
242 interlace;
243 hperiod = tmp1 * 2 / (tmp2 * vfieldrate);
244
245 tmp1 = CVT_MIN_VSYNC_BP * HV_FACTOR / hperiod + 1;
246 /* 9. Find number of lines in sync + backporch */
247 if (tmp1 < (vsync + CVT_MIN_V_PORCH))
248 vsyncandback_porch = vsync + CVT_MIN_V_PORCH;
249 else
250 vsyncandback_porch = tmp1;
251 /* 10. Find number of lines in back porch */
252 vback_porch = vsyncandback_porch - vsync;
253 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin +
254 vsyncandback_porch + CVT_MIN_V_PORCH;
255 /* 5) Definition of Horizontal blanking time limitation */
256 /* Gradient (%/kHz) - default 600 */
257#define CVT_M_FACTOR 600
258 /* Offset (%) - default 40 */
259#define CVT_C_FACTOR 40
260 /* Blanking time scaling factor - default 128 */
261#define CVT_K_FACTOR 128
262 /* Scaling factor weighting - default 20 */
263#define CVT_J_FACTOR 20
264#define CVT_M_PRIME (CVT_M_FACTOR * CVT_K_FACTOR / 256)
265#define CVT_C_PRIME ((CVT_C_FACTOR - CVT_J_FACTOR) * CVT_K_FACTOR / 256 + \
266 CVT_J_FACTOR)
267 /* 12. Find ideal blanking duty cycle from formula */
268 hblank_percentage = CVT_C_PRIME * HV_FACTOR - CVT_M_PRIME *
269 hperiod / 1000;
270 /* 13. Blanking time */
271 if (hblank_percentage < 20 * HV_FACTOR)
272 hblank_percentage = 20 * HV_FACTOR;
273 hblank = drm_mode->hdisplay * hblank_percentage /
274 (100 * HV_FACTOR - hblank_percentage);
275 hblank -= hblank % (2 * CVT_H_GRANULARITY);
Yannick Guerrini2a97acd2015-03-04 09:30:09 +0100276 /* 14. find the total pixels per line */
Zhao Yakuid782c3f2009-06-22 13:17:08 +0800277 drm_mode->htotal = drm_mode->hdisplay + hblank;
278 drm_mode->hsync_end = drm_mode->hdisplay + hblank / 2;
279 drm_mode->hsync_start = drm_mode->hsync_end -
280 (drm_mode->htotal * CVT_HSYNC_PERCENTAGE) / 100;
281 drm_mode->hsync_start += CVT_H_GRANULARITY -
282 drm_mode->hsync_start % CVT_H_GRANULARITY;
283 /* fill the Vsync values */
284 drm_mode->vsync_start = drm_mode->vdisplay + CVT_MIN_V_PORCH;
285 drm_mode->vsync_end = drm_mode->vsync_start + vsync;
286 } else {
287 /* Reduced blanking */
288 /* Minimum vertical blanking interval time (µs)- default 460 */
289#define CVT_RB_MIN_VBLANK 460
290 /* Fixed number of clocks for horizontal sync */
291#define CVT_RB_H_SYNC 32
292 /* Fixed number of clocks for horizontal blanking */
293#define CVT_RB_H_BLANK 160
294 /* Fixed number of lines for vertical front porch - default 3*/
295#define CVT_RB_VFPORCH 3
296 int vbilines;
297 int tmp1, tmp2;
298 /* 8. Estimate Horizontal period. */
299 tmp1 = HV_FACTOR * 1000000 -
300 CVT_RB_MIN_VBLANK * HV_FACTOR * vfieldrate;
301 tmp2 = vdisplay_rnd + 2 * vmargin;
302 hperiod = tmp1 / (tmp2 * vfieldrate);
303 /* 9. Find number of lines in vertical blanking */
304 vbilines = CVT_RB_MIN_VBLANK * HV_FACTOR / hperiod + 1;
305 /* 10. Check if vertical blanking is sufficient */
306 if (vbilines < (CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH))
307 vbilines = CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH;
308 /* 11. Find total number of lines in vertical field */
309 drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + vbilines;
310 /* 12. Find total number of pixels in a line */
311 drm_mode->htotal = drm_mode->hdisplay + CVT_RB_H_BLANK;
312 /* Fill in HSync values */
313 drm_mode->hsync_end = drm_mode->hdisplay + CVT_RB_H_BLANK / 2;
Adam Jacksonadde0f22010-08-23 10:19:14 -0400314 drm_mode->hsync_start = drm_mode->hsync_end - CVT_RB_H_SYNC;
315 /* Fill in VSync values */
316 drm_mode->vsync_start = drm_mode->vdisplay + CVT_RB_VFPORCH;
317 drm_mode->vsync_end = drm_mode->vsync_start + vsync;
Zhao Yakuid782c3f2009-06-22 13:17:08 +0800318 }
319 /* 15/13. Find pixel clock frequency (kHz for xf86) */
Chris Wilson8a5bbf32016-10-21 15:15:40 +0100320 tmp = drm_mode->htotal; /* perform intermediate calcs in u64 */
321 tmp *= HV_FACTOR * 1000;
322 do_div(tmp, hperiod);
323 tmp -= drm_mode->clock % CVT_CLOCK_STEP;
324 drm_mode->clock = tmp;
Zhao Yakuid782c3f2009-06-22 13:17:08 +0800325 /* 18/16. Find actual vertical frame frequency */
326 /* ignore - just set the mode flag for interlaced */
Adam Jackson171fdd82010-03-29 21:43:31 +0000327 if (interlaced) {
Zhao Yakuid782c3f2009-06-22 13:17:08 +0800328 drm_mode->vtotal *= 2;
Adam Jackson171fdd82010-03-29 21:43:31 +0000329 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE;
330 }
Zhao Yakuid782c3f2009-06-22 13:17:08 +0800331 /* Fill the mode line name */
332 drm_mode_set_name(drm_mode);
333 if (reduced)
334 drm_mode->flags |= (DRM_MODE_FLAG_PHSYNC |
335 DRM_MODE_FLAG_NVSYNC);
336 else
337 drm_mode->flags |= (DRM_MODE_FLAG_PVSYNC |
338 DRM_MODE_FLAG_NHSYNC);
Zhao Yakuid782c3f2009-06-22 13:17:08 +0800339
Adam Jackson171fdd82010-03-29 21:43:31 +0000340 return drm_mode;
Zhao Yakuid782c3f2009-06-22 13:17:08 +0800341}
342EXPORT_SYMBOL(drm_cvt_mode);
343
344/**
Daniel Vetterf5aabb92014-01-23 20:05:00 +0100345 * drm_gtf_mode_complex - create the modeline based on the full GTF algorithm
346 * @dev: drm device
347 * @hdisplay: hdisplay size
348 * @vdisplay: vdisplay size
349 * @vrefresh: vrefresh rate.
350 * @interlaced: whether to compute an interlaced mode
351 * @margins: desired margin (borders) size
Daniel Vetter3ec0db82014-01-23 15:06:15 +0100352 * @GTF_M: extended GTF formula parameters
353 * @GTF_2C: extended GTF formula parameters
354 * @GTF_K: extended GTF formula parameters
355 * @GTF_2J: extended GTF formula parameters
Zhao Yakui26bbdad2009-06-22 13:17:09 +0800356 *
Adam Jackson7a374352010-03-29 21:43:30 +0000357 * GTF feature blocks specify C and J in multiples of 0.5, so we pass them
358 * in here multiplied by two. For a C of 40, pass in 80.
Daniel Vetterf5aabb92014-01-23 20:05:00 +0100359 *
360 * Returns:
361 * The modeline based on the full GTF algorithm stored in a drm_display_mode object.
362 * The display mode object is allocated with drm_mode_create(). Returns NULL
363 * when no mode could be allocated.
Zhao Yakui26bbdad2009-06-22 13:17:09 +0800364 */
Adam Jackson7a374352010-03-29 21:43:30 +0000365struct drm_display_mode *
366drm_gtf_mode_complex(struct drm_device *dev, int hdisplay, int vdisplay,
367 int vrefresh, bool interlaced, int margins,
368 int GTF_M, int GTF_2C, int GTF_K, int GTF_2J)
369{ /* 1) top/bottom margin size (% of height) - default: 1.8, */
Zhao Yakui26bbdad2009-06-22 13:17:09 +0800370#define GTF_MARGIN_PERCENTAGE 18
371 /* 2) character cell horizontal granularity (pixels) - default 8 */
372#define GTF_CELL_GRAN 8
373 /* 3) Minimum vertical porch (lines) - default 3 */
374#define GTF_MIN_V_PORCH 1
375 /* width of vsync in lines */
376#define V_SYNC_RQD 3
377 /* width of hsync as % of total line */
378#define H_SYNC_PERCENT 8
379 /* min time of vsync + back porch (microsec) */
380#define MIN_VSYNC_PLUS_BP 550
Zhao Yakui26bbdad2009-06-22 13:17:09 +0800381 /* C' and M' are part of the Blanking Duty Cycle computation */
Adam Jackson7a374352010-03-29 21:43:30 +0000382#define GTF_C_PRIME ((((GTF_2C - GTF_2J) * GTF_K / 256) + GTF_2J) / 2)
383#define GTF_M_PRIME (GTF_K * GTF_M / 256)
Zhao Yakui26bbdad2009-06-22 13:17:09 +0800384 struct drm_display_mode *drm_mode;
385 unsigned int hdisplay_rnd, vdisplay_rnd, vfieldrate_rqd;
386 int top_margin, bottom_margin;
387 int interlace;
388 unsigned int hfreq_est;
389 int vsync_plus_bp, vback_porch;
390 unsigned int vtotal_lines, vfieldrate_est, hperiod;
391 unsigned int vfield_rate, vframe_rate;
392 int left_margin, right_margin;
393 unsigned int total_active_pixels, ideal_duty_cycle;
394 unsigned int hblank, total_pixels, pixel_freq;
395 int hsync, hfront_porch, vodd_front_porch_lines;
396 unsigned int tmp1, tmp2;
397
398 drm_mode = drm_mode_create(dev);
399 if (!drm_mode)
400 return NULL;
401
402 /* 1. In order to give correct results, the number of horizontal
403 * pixels requested is first processed to ensure that it is divisible
404 * by the character size, by rounding it to the nearest character
405 * cell boundary:
406 */
407 hdisplay_rnd = (hdisplay + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN;
408 hdisplay_rnd = hdisplay_rnd * GTF_CELL_GRAN;
409
410 /* 2. If interlace is requested, the number of vertical lines assumed
411 * by the calculation must be halved, as the computation calculates
412 * the number of vertical lines per field.
413 */
414 if (interlaced)
415 vdisplay_rnd = vdisplay / 2;
416 else
417 vdisplay_rnd = vdisplay;
418
419 /* 3. Find the frame rate required: */
420 if (interlaced)
421 vfieldrate_rqd = vrefresh * 2;
422 else
423 vfieldrate_rqd = vrefresh;
424
425 /* 4. Find number of lines in Top margin: */
426 top_margin = 0;
427 if (margins)
428 top_margin = (vdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) /
429 1000;
430 /* 5. Find number of lines in bottom margin: */
431 bottom_margin = top_margin;
432
433 /* 6. If interlace is required, then set variable interlace: */
434 if (interlaced)
435 interlace = 1;
436 else
437 interlace = 0;
438
439 /* 7. Estimate the Horizontal frequency */
440 {
441 tmp1 = (1000000 - MIN_VSYNC_PLUS_BP * vfieldrate_rqd) / 500;
442 tmp2 = (vdisplay_rnd + 2 * top_margin + GTF_MIN_V_PORCH) *
443 2 + interlace;
444 hfreq_est = (tmp2 * 1000 * vfieldrate_rqd) / tmp1;
445 }
446
447 /* 8. Find the number of lines in V sync + back porch */
448 /* [V SYNC+BP] = RINT(([MIN VSYNC+BP] * hfreq_est / 1000000)) */
449 vsync_plus_bp = MIN_VSYNC_PLUS_BP * hfreq_est / 1000;
450 vsync_plus_bp = (vsync_plus_bp + 500) / 1000;
451 /* 9. Find the number of lines in V back porch alone: */
452 vback_porch = vsync_plus_bp - V_SYNC_RQD;
453 /* 10. Find the total number of lines in Vertical field period: */
454 vtotal_lines = vdisplay_rnd + top_margin + bottom_margin +
455 vsync_plus_bp + GTF_MIN_V_PORCH;
456 /* 11. Estimate the Vertical field frequency: */
457 vfieldrate_est = hfreq_est / vtotal_lines;
458 /* 12. Find the actual horizontal period: */
459 hperiod = 1000000 / (vfieldrate_rqd * vtotal_lines);
460
461 /* 13. Find the actual Vertical field frequency: */
462 vfield_rate = hfreq_est / vtotal_lines;
463 /* 14. Find the Vertical frame frequency: */
464 if (interlaced)
465 vframe_rate = vfield_rate / 2;
466 else
467 vframe_rate = vfield_rate;
468 /* 15. Find number of pixels in left margin: */
469 if (margins)
470 left_margin = (hdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) /
471 1000;
472 else
473 left_margin = 0;
474
475 /* 16.Find number of pixels in right margin: */
476 right_margin = left_margin;
477 /* 17.Find total number of active pixels in image and left and right */
478 total_active_pixels = hdisplay_rnd + left_margin + right_margin;
479 /* 18.Find the ideal blanking duty cycle from blanking duty cycle */
480 ideal_duty_cycle = GTF_C_PRIME * 1000 -
481 (GTF_M_PRIME * 1000000 / hfreq_est);
482 /* 19.Find the number of pixels in the blanking time to the nearest
483 * double character cell: */
484 hblank = total_active_pixels * ideal_duty_cycle /
485 (100000 - ideal_duty_cycle);
486 hblank = (hblank + GTF_CELL_GRAN) / (2 * GTF_CELL_GRAN);
487 hblank = hblank * 2 * GTF_CELL_GRAN;
488 /* 20.Find total number of pixels: */
489 total_pixels = total_active_pixels + hblank;
490 /* 21.Find pixel clock frequency: */
491 pixel_freq = total_pixels * hfreq_est / 1000;
492 /* Stage 1 computations are now complete; I should really pass
493 * the results to another function and do the Stage 2 computations,
494 * but I only need a few more values so I'll just append the
495 * computations here for now */
496 /* 17. Find the number of pixels in the horizontal sync period: */
497 hsync = H_SYNC_PERCENT * total_pixels / 100;
498 hsync = (hsync + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN;
499 hsync = hsync * GTF_CELL_GRAN;
500 /* 18. Find the number of pixels in horizontal front porch period */
501 hfront_porch = hblank / 2 - hsync;
502 /* 36. Find the number of lines in the odd front porch period: */
503 vodd_front_porch_lines = GTF_MIN_V_PORCH ;
504
505 /* finally, pack the results in the mode struct */
506 drm_mode->hdisplay = hdisplay_rnd;
507 drm_mode->hsync_start = hdisplay_rnd + hfront_porch;
508 drm_mode->hsync_end = drm_mode->hsync_start + hsync;
509 drm_mode->htotal = total_pixels;
510 drm_mode->vdisplay = vdisplay_rnd;
511 drm_mode->vsync_start = vdisplay_rnd + vodd_front_porch_lines;
512 drm_mode->vsync_end = drm_mode->vsync_start + V_SYNC_RQD;
513 drm_mode->vtotal = vtotal_lines;
514
515 drm_mode->clock = pixel_freq;
516
Zhao Yakui26bbdad2009-06-22 13:17:09 +0800517 if (interlaced) {
518 drm_mode->vtotal *= 2;
519 drm_mode->flags |= DRM_MODE_FLAG_INTERLACE;
520 }
521
Adam Jackson171fdd82010-03-29 21:43:31 +0000522 drm_mode_set_name(drm_mode);
Adam Jacksonc385e50c2010-04-08 19:00:30 +0000523 if (GTF_M == 600 && GTF_2C == 80 && GTF_K == 128 && GTF_2J == 40)
524 drm_mode->flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC;
525 else
526 drm_mode->flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC;
Adam Jackson171fdd82010-03-29 21:43:31 +0000527
Zhao Yakui26bbdad2009-06-22 13:17:09 +0800528 return drm_mode;
529}
Adam Jackson7a374352010-03-29 21:43:30 +0000530EXPORT_SYMBOL(drm_gtf_mode_complex);
531
532/**
Daniel Vetterf5aabb92014-01-23 20:05:00 +0100533 * drm_gtf_mode - create the modeline based on the GTF algorithm
534 * @dev: drm device
535 * @hdisplay: hdisplay size
536 * @vdisplay: vdisplay size
537 * @vrefresh: vrefresh rate.
538 * @interlaced: whether to compute an interlaced mode
539 * @margins: desired margin (borders) size
Adam Jackson7a374352010-03-29 21:43:30 +0000540 *
Adam Jackson7a374352010-03-29 21:43:30 +0000541 * return the modeline based on GTF algorithm
542 *
543 * This function is to create the modeline based on the GTF algorithm.
544 * Generalized Timing Formula is derived from:
Daniel Vetter2e7a5702016-06-01 23:40:36 +0200545 *
Adam Jackson7a374352010-03-29 21:43:30 +0000546 * GTF Spreadsheet by Andy Morrish (1/5/97)
547 * available at http://www.vesa.org
548 *
549 * And it is copied from the file of xserver/hw/xfree86/modes/xf86gtf.c.
550 * What I have done is to translate it by using integer calculation.
551 * I also refer to the function of fb_get_mode in the file of
552 * drivers/video/fbmon.c
553 *
Daniel Vetterda5335b2016-05-31 22:55:13 +0200554 * Standard GTF parameters::
555 *
Danilo Cesar Lemes de Paulaf03d8ed2015-11-25 18:07:55 +0100556 * M = 600
557 * C = 40
558 * K = 128
559 * J = 20
Daniel Vetterf5aabb92014-01-23 20:05:00 +0100560 *
561 * Returns:
562 * The modeline based on the GTF algorithm stored in a drm_display_mode object.
563 * The display mode object is allocated with drm_mode_create(). Returns NULL
564 * when no mode could be allocated.
Adam Jackson7a374352010-03-29 21:43:30 +0000565 */
566struct drm_display_mode *
567drm_gtf_mode(struct drm_device *dev, int hdisplay, int vdisplay, int vrefresh,
Daniel Vetter3ec0db82014-01-23 15:06:15 +0100568 bool interlaced, int margins)
Adam Jackson7a374352010-03-29 21:43:30 +0000569{
Daniel Vetter3ec0db82014-01-23 15:06:15 +0100570 return drm_gtf_mode_complex(dev, hdisplay, vdisplay, vrefresh,
571 interlaced, margins,
572 600, 40 * 2, 128, 20 * 2);
Adam Jackson7a374352010-03-29 21:43:30 +0000573}
Zhao Yakui26bbdad2009-06-22 13:17:09 +0800574EXPORT_SYMBOL(drm_gtf_mode);
Adam Jackson7a374352010-03-29 21:43:30 +0000575
Tomi Valkeinena38884f2013-03-12 10:15:43 +0200576#ifdef CONFIG_VIDEOMODE_HELPERS
Daniel Vetterf5aabb92014-01-23 20:05:00 +0100577/**
578 * drm_display_mode_from_videomode - fill in @dmode using @vm,
579 * @vm: videomode structure to use as source
580 * @dmode: drm_display_mode structure to use as destination
581 *
582 * Fills out @dmode using the display mode specified in @vm.
583 */
Daniel Vetterba0c2422014-01-23 16:28:50 +0100584void drm_display_mode_from_videomode(const struct videomode *vm,
585 struct drm_display_mode *dmode)
Steffen Trumtrarebc64e42012-11-14 11:22:52 +0100586{
587 dmode->hdisplay = vm->hactive;
588 dmode->hsync_start = dmode->hdisplay + vm->hfront_porch;
589 dmode->hsync_end = dmode->hsync_start + vm->hsync_len;
590 dmode->htotal = dmode->hsync_end + vm->hback_porch;
591
592 dmode->vdisplay = vm->vactive;
593 dmode->vsync_start = dmode->vdisplay + vm->vfront_porch;
594 dmode->vsync_end = dmode->vsync_start + vm->vsync_len;
595 dmode->vtotal = dmode->vsync_end + vm->vback_porch;
596
597 dmode->clock = vm->pixelclock / 1000;
598
599 dmode->flags = 0;
Tomi Valkeinen06a33072013-03-12 10:26:45 +0200600 if (vm->flags & DISPLAY_FLAGS_HSYNC_HIGH)
Steffen Trumtrarebc64e42012-11-14 11:22:52 +0100601 dmode->flags |= DRM_MODE_FLAG_PHSYNC;
Tomi Valkeinen06a33072013-03-12 10:26:45 +0200602 else if (vm->flags & DISPLAY_FLAGS_HSYNC_LOW)
Steffen Trumtrarebc64e42012-11-14 11:22:52 +0100603 dmode->flags |= DRM_MODE_FLAG_NHSYNC;
Tomi Valkeinen06a33072013-03-12 10:26:45 +0200604 if (vm->flags & DISPLAY_FLAGS_VSYNC_HIGH)
Steffen Trumtrarebc64e42012-11-14 11:22:52 +0100605 dmode->flags |= DRM_MODE_FLAG_PVSYNC;
Tomi Valkeinen06a33072013-03-12 10:26:45 +0200606 else if (vm->flags & DISPLAY_FLAGS_VSYNC_LOW)
Steffen Trumtrarebc64e42012-11-14 11:22:52 +0100607 dmode->flags |= DRM_MODE_FLAG_NVSYNC;
Tomi Valkeinen06a33072013-03-12 10:26:45 +0200608 if (vm->flags & DISPLAY_FLAGS_INTERLACED)
Steffen Trumtrarebc64e42012-11-14 11:22:52 +0100609 dmode->flags |= DRM_MODE_FLAG_INTERLACE;
Tomi Valkeinen06a33072013-03-12 10:26:45 +0200610 if (vm->flags & DISPLAY_FLAGS_DOUBLESCAN)
Steffen Trumtrarebc64e42012-11-14 11:22:52 +0100611 dmode->flags |= DRM_MODE_FLAG_DBLSCAN;
Steffen Trumtrar328a4712013-05-27 12:33:35 +0000612 if (vm->flags & DISPLAY_FLAGS_DOUBLECLK)
613 dmode->flags |= DRM_MODE_FLAG_DBLCLK;
Steffen Trumtrarebc64e42012-11-14 11:22:52 +0100614 drm_mode_set_name(dmode);
Steffen Trumtrarebc64e42012-11-14 11:22:52 +0100615}
616EXPORT_SYMBOL_GPL(drm_display_mode_from_videomode);
Steffen Trumtrarebc64e42012-11-14 11:22:52 +0100617
Steve Longerbeamd490f452014-12-18 18:00:22 -0800618/**
619 * drm_display_mode_to_videomode - fill in @vm using @dmode,
620 * @dmode: drm_display_mode structure to use as source
621 * @vm: videomode structure to use as destination
622 *
623 * Fills out @vm using the display mode specified in @dmode.
624 */
625void drm_display_mode_to_videomode(const struct drm_display_mode *dmode,
626 struct videomode *vm)
627{
628 vm->hactive = dmode->hdisplay;
629 vm->hfront_porch = dmode->hsync_start - dmode->hdisplay;
630 vm->hsync_len = dmode->hsync_end - dmode->hsync_start;
631 vm->hback_porch = dmode->htotal - dmode->hsync_end;
632
633 vm->vactive = dmode->vdisplay;
634 vm->vfront_porch = dmode->vsync_start - dmode->vdisplay;
635 vm->vsync_len = dmode->vsync_end - dmode->vsync_start;
636 vm->vback_porch = dmode->vtotal - dmode->vsync_end;
637
638 vm->pixelclock = dmode->clock * 1000;
639
640 vm->flags = 0;
641 if (dmode->flags & DRM_MODE_FLAG_PHSYNC)
642 vm->flags |= DISPLAY_FLAGS_HSYNC_HIGH;
643 else if (dmode->flags & DRM_MODE_FLAG_NHSYNC)
644 vm->flags |= DISPLAY_FLAGS_HSYNC_LOW;
645 if (dmode->flags & DRM_MODE_FLAG_PVSYNC)
646 vm->flags |= DISPLAY_FLAGS_VSYNC_HIGH;
647 else if (dmode->flags & DRM_MODE_FLAG_NVSYNC)
648 vm->flags |= DISPLAY_FLAGS_VSYNC_LOW;
649 if (dmode->flags & DRM_MODE_FLAG_INTERLACE)
650 vm->flags |= DISPLAY_FLAGS_INTERLACED;
651 if (dmode->flags & DRM_MODE_FLAG_DBLSCAN)
652 vm->flags |= DISPLAY_FLAGS_DOUBLESCAN;
653 if (dmode->flags & DRM_MODE_FLAG_DBLCLK)
654 vm->flags |= DISPLAY_FLAGS_DOUBLECLK;
655}
656EXPORT_SYMBOL_GPL(drm_display_mode_to_videomode);
657
Lothar Waßmanncb34d7f2016-08-16 15:34:37 +0200658/**
659 * drm_bus_flags_from_videomode - extract information about pixelclk and
660 * DE polarity from videomode and store it in a separate variable
661 * @vm: videomode structure to use
662 * @bus_flags: information about pixelclk and DE polarity will be stored here
663 *
664 * Sets DRM_BUS_FLAG_DE_(LOW|HIGH) and DRM_BUS_FLAG_PIXDATA_(POS|NEG)EDGE
665 * in @bus_flags according to DISPLAY_FLAGS found in @vm
666 */
Lothar Waßmannd72daa02016-07-12 15:30:02 +0200667void drm_bus_flags_from_videomode(const struct videomode *vm, u32 *bus_flags)
668{
669 *bus_flags = 0;
670 if (vm->flags & DISPLAY_FLAGS_PIXDATA_POSEDGE)
671 *bus_flags |= DRM_BUS_FLAG_PIXDATA_POSEDGE;
672 if (vm->flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE)
673 *bus_flags |= DRM_BUS_FLAG_PIXDATA_NEGEDGE;
674
675 if (vm->flags & DISPLAY_FLAGS_DE_LOW)
676 *bus_flags |= DRM_BUS_FLAG_DE_LOW;
677 if (vm->flags & DISPLAY_FLAGS_DE_HIGH)
678 *bus_flags |= DRM_BUS_FLAG_DE_HIGH;
679}
680EXPORT_SYMBOL_GPL(drm_bus_flags_from_videomode);
681
Tomi Valkeinena38884f2013-03-12 10:15:43 +0200682#ifdef CONFIG_OF
Steffen Trumtraredb37a92012-10-28 18:28:06 +0100683/**
684 * of_get_drm_display_mode - get a drm_display_mode from devicetree
685 * @np: device_node with the timing specification
686 * @dmode: will be set to the return value
Lothar Waßmanncb34d7f2016-08-16 15:34:37 +0200687 * @bus_flags: information about pixelclk and DE polarity
Steffen Trumtraredb37a92012-10-28 18:28:06 +0100688 * @index: index into the list of display timings in devicetree
689 *
690 * This function is expensive and should only be used, if only one mode is to be
691 * read from DT. To get multiple modes start with of_get_display_timings and
692 * work with that instead.
Daniel Vetterf5aabb92014-01-23 20:05:00 +0100693 *
694 * Returns:
695 * 0 on success, a negative errno code when no of videomode node was found.
Steffen Trumtraredb37a92012-10-28 18:28:06 +0100696 */
697int of_get_drm_display_mode(struct device_node *np,
Lothar Waßmannfafc79e2016-07-12 15:30:03 +0200698 struct drm_display_mode *dmode, u32 *bus_flags,
699 int index)
Steffen Trumtraredb37a92012-10-28 18:28:06 +0100700{
701 struct videomode vm;
702 int ret;
703
704 ret = of_get_videomode(np, &vm, index);
705 if (ret)
706 return ret;
707
708 drm_display_mode_from_videomode(&vm, dmode);
Lothar Waßmannfafc79e2016-07-12 15:30:03 +0200709 if (bus_flags)
710 drm_bus_flags_from_videomode(&vm, bus_flags);
Steffen Trumtraredb37a92012-10-28 18:28:06 +0100711
712 pr_debug("%s: got %dx%d display mode from %s\n",
713 of_node_full_name(np), vm.hactive, vm.vactive, np->name);
714 drm_mode_debug_printmodeline(dmode);
715
716 return 0;
717}
718EXPORT_SYMBOL_GPL(of_get_drm_display_mode);
Tomi Valkeinena38884f2013-03-12 10:15:43 +0200719#endif /* CONFIG_OF */
720#endif /* CONFIG_VIDEOMODE_HELPERS */
Steffen Trumtraredb37a92012-10-28 18:28:06 +0100721
Zhao Yakui26bbdad2009-06-22 13:17:09 +0800722/**
Dave Airlief453ba02008-11-07 14:05:41 -0800723 * drm_mode_set_name - set the name on a mode
724 * @mode: name will be set in this mode
725 *
Daniel Vetterf5aabb92014-01-23 20:05:00 +0100726 * Set the name of @mode to a standard format which is <hdisplay>x<vdisplay>
727 * with an optional 'i' suffix for interlaced modes.
Dave Airlief453ba02008-11-07 14:05:41 -0800728 */
729void drm_mode_set_name(struct drm_display_mode *mode)
730{
Adam Jackson171fdd82010-03-29 21:43:31 +0000731 bool interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
732
733 snprintf(mode->name, DRM_DISPLAY_MODE_LEN, "%dx%d%s",
734 mode->hdisplay, mode->vdisplay,
735 interlaced ? "i" : "");
Dave Airlief453ba02008-11-07 14:05:41 -0800736}
737EXPORT_SYMBOL(drm_mode_set_name);
738
Daniel Vetter30ecad72015-12-09 09:29:36 +0100739/**
740 * drm_mode_hsync - get the hsync of a mode
Adam Jackson7ac96a92009-12-03 17:44:37 -0500741 * @mode: mode
742 *
Daniel Vetterf5aabb92014-01-23 20:05:00 +0100743 * Returns:
744 * @modes's hsync rate in kHz, rounded to the nearest integer. Calculates the
745 * value first if it is not yet set.
Adam Jackson7ac96a92009-12-03 17:44:37 -0500746 */
Chris Wilsonb1f559e2011-01-26 09:49:47 +0000747int drm_mode_hsync(const struct drm_display_mode *mode)
Adam Jackson7ac96a92009-12-03 17:44:37 -0500748{
749 unsigned int calc_val;
750
751 if (mode->hsync)
752 return mode->hsync;
753
754 if (mode->htotal < 0)
755 return 0;
756
757 calc_val = (mode->clock * 1000) / mode->htotal; /* hsync in Hz */
758 calc_val += 500; /* round to 1000Hz */
759 calc_val /= 1000; /* truncate to kHz */
760
761 return calc_val;
762}
763EXPORT_SYMBOL(drm_mode_hsync);
764
Dave Airlief453ba02008-11-07 14:05:41 -0800765/**
766 * drm_mode_vrefresh - get the vrefresh of a mode
767 * @mode: mode
768 *
Daniel Vetterf5aabb92014-01-23 20:05:00 +0100769 * Returns:
770 * @modes's vrefresh rate in Hz, rounded to the nearest integer. Calculates the
771 * value first if it is not yet set.
Dave Airlief453ba02008-11-07 14:05:41 -0800772 */
Chris Wilsonb1f559e2011-01-26 09:49:47 +0000773int drm_mode_vrefresh(const struct drm_display_mode *mode)
Dave Airlief453ba02008-11-07 14:05:41 -0800774{
775 int refresh = 0;
776 unsigned int calc_val;
777
778 if (mode->vrefresh > 0)
779 refresh = mode->vrefresh;
780 else if (mode->htotal > 0 && mode->vtotal > 0) {
Zhao Yakui559ee212009-09-03 09:33:47 +0800781 int vtotal;
782 vtotal = mode->vtotal;
Dave Airlief453ba02008-11-07 14:05:41 -0800783 /* work out vrefresh the value will be x1000 */
784 calc_val = (mode->clock * 1000);
Dave Airlief453ba02008-11-07 14:05:41 -0800785 calc_val /= mode->htotal;
Zhao Yakui559ee212009-09-03 09:33:47 +0800786 refresh = (calc_val + vtotal / 2) / vtotal;
Dave Airlief453ba02008-11-07 14:05:41 -0800787
Dave Airlief453ba02008-11-07 14:05:41 -0800788 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
789 refresh *= 2;
790 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
791 refresh /= 2;
792 if (mode->vscan > 1)
793 refresh /= mode->vscan;
794 }
795 return refresh;
796}
797EXPORT_SYMBOL(drm_mode_vrefresh);
798
799/**
Daniel Vetter196cd5d2017-01-25 07:26:56 +0100800 * drm_mode_get_hv_timing - Fetches hdisplay/vdisplay for given mode
801 * @mode: mode to query
802 * @hdisplay: hdisplay value to fill in
803 * @vdisplay: vdisplay value to fill in
804 *
805 * The vdisplay value will be doubled if the specified mode is a stereo mode of
806 * the appropriate layout.
807 */
808void drm_mode_get_hv_timing(const struct drm_display_mode *mode,
809 int *hdisplay, int *vdisplay)
810{
811 struct drm_display_mode adjusted;
812
813 drm_mode_copy(&adjusted, mode);
814 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY);
815 *hdisplay = adjusted.crtc_hdisplay;
816 *vdisplay = adjusted.crtc_vdisplay;
817}
818EXPORT_SYMBOL(drm_mode_get_hv_timing);
819
820/**
Daniel Vetterf5aabb92014-01-23 20:05:00 +0100821 * drm_mode_set_crtcinfo - set CRTC modesetting timing parameters
Dave Airlief453ba02008-11-07 14:05:41 -0800822 * @p: mode
Damien Lespiau448cce22013-09-25 16:45:35 +0100823 * @adjust_flags: a combination of adjustment flags
Dave Airlief453ba02008-11-07 14:05:41 -0800824 *
Daniel Vetterf5aabb92014-01-23 20:05:00 +0100825 * Setup the CRTC modesetting timing parameters for @p, adjusting if necessary.
Damien Lespiau448cce22013-09-25 16:45:35 +0100826 *
827 * - The CRTC_INTERLACE_HALVE_V flag can be used to halve vertical timings of
828 * interlaced modes.
829 * - The CRTC_STEREO_DOUBLE flag can be used to compute the timings for
830 * buffers containing two eyes (only adjust the timings when needed, eg. for
831 * "frame packing" or "side by side full").
Gustavo Padovanecb7e162014-12-01 15:40:09 -0800832 * - The CRTC_NO_DBLSCAN and CRTC_NO_VSCAN flags request that adjustment *not*
833 * be performed for doublescan and vscan > 1 modes respectively.
Dave Airlief453ba02008-11-07 14:05:41 -0800834 */
835void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags)
836{
837 if ((p == NULL) || ((p->type & DRM_MODE_TYPE_CRTC_C) == DRM_MODE_TYPE_BUILTIN))
838 return;
839
Damien Lespiaubde2dcf2013-09-25 16:45:34 +0100840 p->crtc_clock = p->clock;
Dave Airlief453ba02008-11-07 14:05:41 -0800841 p->crtc_hdisplay = p->hdisplay;
842 p->crtc_hsync_start = p->hsync_start;
843 p->crtc_hsync_end = p->hsync_end;
844 p->crtc_htotal = p->htotal;
845 p->crtc_hskew = p->hskew;
846 p->crtc_vdisplay = p->vdisplay;
847 p->crtc_vsync_start = p->vsync_start;
848 p->crtc_vsync_end = p->vsync_end;
849 p->crtc_vtotal = p->vtotal;
850
851 if (p->flags & DRM_MODE_FLAG_INTERLACE) {
852 if (adjust_flags & CRTC_INTERLACE_HALVE_V) {
853 p->crtc_vdisplay /= 2;
854 p->crtc_vsync_start /= 2;
855 p->crtc_vsync_end /= 2;
856 p->crtc_vtotal /= 2;
857 }
Dave Airlief453ba02008-11-07 14:05:41 -0800858 }
859
Gustavo Padovanecb7e162014-12-01 15:40:09 -0800860 if (!(adjust_flags & CRTC_NO_DBLSCAN)) {
861 if (p->flags & DRM_MODE_FLAG_DBLSCAN) {
862 p->crtc_vdisplay *= 2;
863 p->crtc_vsync_start *= 2;
864 p->crtc_vsync_end *= 2;
865 p->crtc_vtotal *= 2;
866 }
Dave Airlief453ba02008-11-07 14:05:41 -0800867 }
868
Gustavo Padovanecb7e162014-12-01 15:40:09 -0800869 if (!(adjust_flags & CRTC_NO_VSCAN)) {
870 if (p->vscan > 1) {
871 p->crtc_vdisplay *= p->vscan;
872 p->crtc_vsync_start *= p->vscan;
873 p->crtc_vsync_end *= p->vscan;
874 p->crtc_vtotal *= p->vscan;
875 }
Dave Airlief453ba02008-11-07 14:05:41 -0800876 }
877
Damien Lespiau448cce22013-09-25 16:45:35 +0100878 if (adjust_flags & CRTC_STEREO_DOUBLE) {
879 unsigned int layout = p->flags & DRM_MODE_FLAG_3D_MASK;
880
881 switch (layout) {
882 case DRM_MODE_FLAG_3D_FRAME_PACKING:
883 p->crtc_clock *= 2;
884 p->crtc_vdisplay += p->crtc_vtotal;
885 p->crtc_vsync_start += p->crtc_vtotal;
886 p->crtc_vsync_end += p->crtc_vtotal;
887 p->crtc_vtotal += p->crtc_vtotal;
888 break;
889 }
890 }
891
Dave Airlief453ba02008-11-07 14:05:41 -0800892 p->crtc_vblank_start = min(p->crtc_vsync_start, p->crtc_vdisplay);
893 p->crtc_vblank_end = max(p->crtc_vsync_end, p->crtc_vtotal);
894 p->crtc_hblank_start = min(p->crtc_hsync_start, p->crtc_hdisplay);
895 p->crtc_hblank_end = max(p->crtc_hsync_end, p->crtc_htotal);
Dave Airlief453ba02008-11-07 14:05:41 -0800896}
897EXPORT_SYMBOL(drm_mode_set_crtcinfo);
898
Dave Airlief453ba02008-11-07 14:05:41 -0800899/**
Ville Syrjäläc3c50e82012-03-13 12:35:51 +0200900 * drm_mode_copy - copy the mode
901 * @dst: mode to overwrite
902 * @src: mode to copy
903 *
Ville Syrjälä72e45e92013-05-31 12:17:06 +0000904 * Copy an existing mode into another mode, preserving the object id and
905 * list head of the destination mode.
Ville Syrjäläc3c50e82012-03-13 12:35:51 +0200906 */
907void drm_mode_copy(struct drm_display_mode *dst, const struct drm_display_mode *src)
908{
909 int id = dst->base.id;
Ville Syrjälä72e45e92013-05-31 12:17:06 +0000910 struct list_head head = dst->head;
Ville Syrjäläc3c50e82012-03-13 12:35:51 +0200911
912 *dst = *src;
913 dst->base.id = id;
Ville Syrjälä72e45e92013-05-31 12:17:06 +0000914 dst->head = head;
Ville Syrjäläc3c50e82012-03-13 12:35:51 +0200915}
916EXPORT_SYMBOL(drm_mode_copy);
917
918/**
Dave Airlief453ba02008-11-07 14:05:41 -0800919 * drm_mode_duplicate - allocate and duplicate an existing mode
Daniel Vetter3ec0db82014-01-23 15:06:15 +0100920 * @dev: drm_device to allocate the duplicated mode for
921 * @mode: mode to duplicate
Dave Airlief453ba02008-11-07 14:05:41 -0800922 *
Dave Airlief453ba02008-11-07 14:05:41 -0800923 * Just allocate a new mode, copy the existing mode into it, and return
924 * a pointer to it. Used to create new instances of established modes.
Daniel Vetterf5aabb92014-01-23 20:05:00 +0100925 *
926 * Returns:
927 * Pointer to duplicated mode on success, NULL on error.
Dave Airlief453ba02008-11-07 14:05:41 -0800928 */
929struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev,
Chris Wilsonb1f559e2011-01-26 09:49:47 +0000930 const struct drm_display_mode *mode)
Dave Airlief453ba02008-11-07 14:05:41 -0800931{
932 struct drm_display_mode *nmode;
Dave Airlief453ba02008-11-07 14:05:41 -0800933
934 nmode = drm_mode_create(dev);
935 if (!nmode)
936 return NULL;
937
Ville Syrjäläc3c50e82012-03-13 12:35:51 +0200938 drm_mode_copy(nmode, mode);
939
Dave Airlief453ba02008-11-07 14:05:41 -0800940 return nmode;
941}
942EXPORT_SYMBOL(drm_mode_duplicate);
943
944/**
945 * drm_mode_equal - test modes for equality
946 * @mode1: first mode
947 * @mode2: second mode
948 *
Dave Airlief453ba02008-11-07 14:05:41 -0800949 * Check to see if @mode1 and @mode2 are equivalent.
950 *
Daniel Vetterf5aabb92014-01-23 20:05:00 +0100951 * Returns:
Dave Airlief453ba02008-11-07 14:05:41 -0800952 * True if the modes are equal, false otherwise.
953 */
Ville Syrjälä0b3904a2012-10-25 18:05:05 +0000954bool drm_mode_equal(const struct drm_display_mode *mode1, const struct drm_display_mode *mode2)
Dave Airlief453ba02008-11-07 14:05:41 -0800955{
Daniel Stone54270952015-03-19 04:33:02 +0000956 if (!mode1 && !mode2)
957 return true;
958
959 if (!mode1 || !mode2)
960 return false;
961
Dave Airlief453ba02008-11-07 14:05:41 -0800962 /* do clock check convert to PICOS so fb modes get matched
963 * the same */
964 if (mode1->clock && mode2->clock) {
965 if (KHZ2PICOS(mode1->clock) != KHZ2PICOS(mode2->clock))
966 return false;
967 } else if (mode1->clock != mode2->clock)
968 return false;
969
Ville Syrjälä4c6bcf42015-11-16 21:05:12 +0200970 return drm_mode_equal_no_clocks(mode1, mode2);
971}
972EXPORT_SYMBOL(drm_mode_equal);
973
974/**
975 * drm_mode_equal_no_clocks - test modes for equality
976 * @mode1: first mode
977 * @mode2: second mode
978 *
979 * Check to see if @mode1 and @mode2 are equivalent, but
980 * don't check the pixel clocks.
981 *
982 * Returns:
983 * True if the modes are equal, false otherwise.
984 */
985bool drm_mode_equal_no_clocks(const struct drm_display_mode *mode1, const struct drm_display_mode *mode2)
986{
Damien Lespiauf2ecf2e32013-09-25 16:45:27 +0100987 if ((mode1->flags & DRM_MODE_FLAG_3D_MASK) !=
988 (mode2->flags & DRM_MODE_FLAG_3D_MASK))
989 return false;
990
991 return drm_mode_equal_no_clocks_no_stereo(mode1, mode2);
Ville Syrjälä8cc3f232013-04-24 19:07:16 +0300992}
Ville Syrjälä4c6bcf42015-11-16 21:05:12 +0200993EXPORT_SYMBOL(drm_mode_equal_no_clocks);
Ville Syrjälä8cc3f232013-04-24 19:07:16 +0300994
995/**
Damien Lespiauf2ecf2e32013-09-25 16:45:27 +0100996 * drm_mode_equal_no_clocks_no_stereo - test modes for equality
Ville Syrjälä8cc3f232013-04-24 19:07:16 +0300997 * @mode1: first mode
998 * @mode2: second mode
999 *
Ville Syrjälä8cc3f232013-04-24 19:07:16 +03001000 * Check to see if @mode1 and @mode2 are equivalent, but
Damien Lespiauf2ecf2e32013-09-25 16:45:27 +01001001 * don't check the pixel clocks nor the stereo layout.
Ville Syrjälä8cc3f232013-04-24 19:07:16 +03001002 *
Daniel Vetterf5aabb92014-01-23 20:05:00 +01001003 * Returns:
Ville Syrjälä8cc3f232013-04-24 19:07:16 +03001004 * True if the modes are equal, false otherwise.
1005 */
Damien Lespiauf2ecf2e32013-09-25 16:45:27 +01001006bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1,
1007 const struct drm_display_mode *mode2)
Ville Syrjälä8cc3f232013-04-24 19:07:16 +03001008{
Dave Airlief453ba02008-11-07 14:05:41 -08001009 if (mode1->hdisplay == mode2->hdisplay &&
1010 mode1->hsync_start == mode2->hsync_start &&
1011 mode1->hsync_end == mode2->hsync_end &&
1012 mode1->htotal == mode2->htotal &&
1013 mode1->hskew == mode2->hskew &&
1014 mode1->vdisplay == mode2->vdisplay &&
1015 mode1->vsync_start == mode2->vsync_start &&
1016 mode1->vsync_end == mode2->vsync_end &&
1017 mode1->vtotal == mode2->vtotal &&
1018 mode1->vscan == mode2->vscan &&
Damien Lespiauf2ecf2e32013-09-25 16:45:27 +01001019 (mode1->flags & ~DRM_MODE_FLAG_3D_MASK) ==
1020 (mode2->flags & ~DRM_MODE_FLAG_3D_MASK))
Dave Airlief453ba02008-11-07 14:05:41 -08001021 return true;
1022
1023 return false;
1024}
Damien Lespiauf2ecf2e32013-09-25 16:45:27 +01001025EXPORT_SYMBOL(drm_mode_equal_no_clocks_no_stereo);
Dave Airlief453ba02008-11-07 14:05:41 -08001026
1027/**
Ville Syrjäläabc0b142014-12-17 13:56:23 +02001028 * drm_mode_validate_basic - make sure the mode is somewhat sane
1029 * @mode: mode to check
1030 *
1031 * Check that the mode timings are at least somewhat reasonable.
1032 * Any hardware specific limits are left up for each driver to check.
1033 *
1034 * Returns:
1035 * The mode status
1036 */
1037enum drm_mode_status
1038drm_mode_validate_basic(const struct drm_display_mode *mode)
1039{
1040 if (mode->clock == 0)
1041 return MODE_CLOCK_LOW;
1042
1043 if (mode->hdisplay == 0 ||
1044 mode->hsync_start < mode->hdisplay ||
1045 mode->hsync_end < mode->hsync_start ||
1046 mode->htotal < mode->hsync_end)
1047 return MODE_H_ILLEGAL;
1048
1049 if (mode->vdisplay == 0 ||
1050 mode->vsync_start < mode->vdisplay ||
1051 mode->vsync_end < mode->vsync_start ||
1052 mode->vtotal < mode->vsync_end)
1053 return MODE_V_ILLEGAL;
1054
1055 return MODE_OK;
1056}
1057EXPORT_SYMBOL(drm_mode_validate_basic);
1058
1059/**
Dave Airlief453ba02008-11-07 14:05:41 -08001060 * drm_mode_validate_size - make sure modes adhere to size constraints
Ville Syrjälä05acaec2014-12-17 13:56:22 +02001061 * @mode: mode to check
Dave Airlief453ba02008-11-07 14:05:41 -08001062 * @maxX: maximum width
1063 * @maxY: maximum height
Dave Airlief453ba02008-11-07 14:05:41 -08001064 *
Daniel Vetterf5aabb92014-01-23 20:05:00 +01001065 * This function is a helper which can be used to validate modes against size
1066 * limitations of the DRM device/connector. If a mode is too big its status
Masanari Iida32197aa2014-10-20 23:53:13 +09001067 * member is updated with the appropriate validation failure code. The list
Daniel Vetterf5aabb92014-01-23 20:05:00 +01001068 * itself is not changed.
Ville Syrjälä05acaec2014-12-17 13:56:22 +02001069 *
1070 * Returns:
1071 * The mode status
Dave Airlief453ba02008-11-07 14:05:41 -08001072 */
Ville Syrjälä05acaec2014-12-17 13:56:22 +02001073enum drm_mode_status
1074drm_mode_validate_size(const struct drm_display_mode *mode,
1075 int maxX, int maxY)
Dave Airlief453ba02008-11-07 14:05:41 -08001076{
Ville Syrjälä05acaec2014-12-17 13:56:22 +02001077 if (maxX > 0 && mode->hdisplay > maxX)
1078 return MODE_VIRTUAL_X;
Dave Airlief453ba02008-11-07 14:05:41 -08001079
Ville Syrjälä05acaec2014-12-17 13:56:22 +02001080 if (maxY > 0 && mode->vdisplay > maxY)
1081 return MODE_VIRTUAL_Y;
Dave Airlief453ba02008-11-07 14:05:41 -08001082
Ville Syrjälä05acaec2014-12-17 13:56:22 +02001083 return MODE_OK;
Dave Airlief453ba02008-11-07 14:05:41 -08001084}
1085EXPORT_SYMBOL(drm_mode_validate_size);
1086
Ville Syrjäläe4bf44b2015-02-02 19:13:57 +02001087#define MODE_STATUS(status) [MODE_ ## status + 3] = #status
1088
1089static const char * const drm_mode_status_names[] = {
1090 MODE_STATUS(OK),
1091 MODE_STATUS(HSYNC),
1092 MODE_STATUS(VSYNC),
1093 MODE_STATUS(H_ILLEGAL),
1094 MODE_STATUS(V_ILLEGAL),
1095 MODE_STATUS(BAD_WIDTH),
1096 MODE_STATUS(NOMODE),
1097 MODE_STATUS(NO_INTERLACE),
1098 MODE_STATUS(NO_DBLESCAN),
1099 MODE_STATUS(NO_VSCAN),
1100 MODE_STATUS(MEM),
1101 MODE_STATUS(VIRTUAL_X),
1102 MODE_STATUS(VIRTUAL_Y),
1103 MODE_STATUS(MEM_VIRT),
1104 MODE_STATUS(NOCLOCK),
1105 MODE_STATUS(CLOCK_HIGH),
1106 MODE_STATUS(CLOCK_LOW),
1107 MODE_STATUS(CLOCK_RANGE),
1108 MODE_STATUS(BAD_HVALUE),
1109 MODE_STATUS(BAD_VVALUE),
1110 MODE_STATUS(BAD_VSCAN),
1111 MODE_STATUS(HSYNC_NARROW),
1112 MODE_STATUS(HSYNC_WIDE),
1113 MODE_STATUS(HBLANK_NARROW),
1114 MODE_STATUS(HBLANK_WIDE),
1115 MODE_STATUS(VSYNC_NARROW),
1116 MODE_STATUS(VSYNC_WIDE),
1117 MODE_STATUS(VBLANK_NARROW),
1118 MODE_STATUS(VBLANK_WIDE),
1119 MODE_STATUS(PANEL),
1120 MODE_STATUS(INTERLACE_WIDTH),
1121 MODE_STATUS(ONE_WIDTH),
1122 MODE_STATUS(ONE_HEIGHT),
1123 MODE_STATUS(ONE_SIZE),
1124 MODE_STATUS(NO_REDUCED),
1125 MODE_STATUS(NO_STEREO),
Ville Syrjälä5ba89402015-12-10 22:39:08 +02001126 MODE_STATUS(STALE),
Ville Syrjäläe4bf44b2015-02-02 19:13:57 +02001127 MODE_STATUS(BAD),
1128 MODE_STATUS(ERROR),
1129};
1130
1131#undef MODE_STATUS
1132
1133static const char *drm_get_mode_status_name(enum drm_mode_status status)
1134{
1135 int index = status + 3;
1136
1137 if (WARN_ON(index < 0 || index >= ARRAY_SIZE(drm_mode_status_names)))
1138 return "";
1139
1140 return drm_mode_status_names[index];
1141}
1142
Dave Airlief453ba02008-11-07 14:05:41 -08001143/**
Dave Airlief453ba02008-11-07 14:05:41 -08001144 * drm_mode_prune_invalid - remove invalid modes from mode list
1145 * @dev: DRM device
1146 * @mode_list: list of modes to check
1147 * @verbose: be verbose about it
1148 *
Daniel Vetterf5aabb92014-01-23 20:05:00 +01001149 * This helper function can be used to prune a display mode list after
1150 * validation has been completed. All modes who's status is not MODE_OK will be
1151 * removed from the list, and if @verbose the status code and mode name is also
1152 * printed to dmesg.
Dave Airlief453ba02008-11-07 14:05:41 -08001153 */
1154void drm_mode_prune_invalid(struct drm_device *dev,
1155 struct list_head *mode_list, bool verbose)
1156{
1157 struct drm_display_mode *mode, *t;
1158
1159 list_for_each_entry_safe(mode, t, mode_list, head) {
1160 if (mode->status != MODE_OK) {
1161 list_del(&mode->head);
1162 if (verbose) {
1163 drm_mode_debug_printmodeline(mode);
Ville Syrjäläe4bf44b2015-02-02 19:13:57 +02001164 DRM_DEBUG_KMS("Not using %s mode: %s\n",
1165 mode->name,
1166 drm_get_mode_status_name(mode->status));
Dave Airlief453ba02008-11-07 14:05:41 -08001167 }
1168 drm_mode_destroy(dev, mode);
1169 }
1170 }
1171}
1172EXPORT_SYMBOL(drm_mode_prune_invalid);
1173
1174/**
1175 * drm_mode_compare - compare modes for favorability
Dave Chinner2c761272010-01-12 17:39:16 +11001176 * @priv: unused
Dave Airlief453ba02008-11-07 14:05:41 -08001177 * @lh_a: list_head for first mode
1178 * @lh_b: list_head for second mode
1179 *
Dave Airlief453ba02008-11-07 14:05:41 -08001180 * Compare two modes, given by @lh_a and @lh_b, returning a value indicating
1181 * which is better.
1182 *
Daniel Vetterf5aabb92014-01-23 20:05:00 +01001183 * Returns:
Dave Airlief453ba02008-11-07 14:05:41 -08001184 * Negative if @lh_a is better than @lh_b, zero if they're equivalent, or
1185 * positive if @lh_b is better than @lh_a.
1186 */
Dave Chinner2c761272010-01-12 17:39:16 +11001187static int drm_mode_compare(void *priv, struct list_head *lh_a, struct list_head *lh_b)
Dave Airlief453ba02008-11-07 14:05:41 -08001188{
1189 struct drm_display_mode *a = list_entry(lh_a, struct drm_display_mode, head);
1190 struct drm_display_mode *b = list_entry(lh_b, struct drm_display_mode, head);
1191 int diff;
1192
1193 diff = ((b->type & DRM_MODE_TYPE_PREFERRED) != 0) -
1194 ((a->type & DRM_MODE_TYPE_PREFERRED) != 0);
1195 if (diff)
1196 return diff;
1197 diff = b->hdisplay * b->vdisplay - a->hdisplay * a->vdisplay;
1198 if (diff)
1199 return diff;
Ville Syrjälä9bc3cd52013-05-31 12:17:08 +00001200
1201 diff = b->vrefresh - a->vrefresh;
1202 if (diff)
1203 return diff;
1204
Dave Airlief453ba02008-11-07 14:05:41 -08001205 diff = b->clock - a->clock;
1206 return diff;
1207}
1208
Dave Airlief453ba02008-11-07 14:05:41 -08001209/**
1210 * drm_mode_sort - sort mode list
Daniel Vetterf5aabb92014-01-23 20:05:00 +01001211 * @mode_list: list of drm_display_mode structures to sort
Dave Airlief453ba02008-11-07 14:05:41 -08001212 *
Daniel Vetterf5aabb92014-01-23 20:05:00 +01001213 * Sort @mode_list by favorability, moving good modes to the head of the list.
Dave Airlief453ba02008-11-07 14:05:41 -08001214 */
1215void drm_mode_sort(struct list_head *mode_list)
1216{
Dave Chinner2c761272010-01-12 17:39:16 +11001217 list_sort(NULL, mode_list, drm_mode_compare);
Dave Airlief453ba02008-11-07 14:05:41 -08001218}
1219EXPORT_SYMBOL(drm_mode_sort);
1220
1221/**
1222 * drm_mode_connector_list_update - update the mode list for the connector
1223 * @connector: the connector to update
1224 *
Dave Airlief453ba02008-11-07 14:05:41 -08001225 * This moves the modes from the @connector probed_modes list
1226 * to the actual mode list. It compares the probed mode against the current
Daniel Vetterf5aabb92014-01-23 20:05:00 +01001227 * list and only adds different/new modes.
1228 *
1229 * This is just a helper functions doesn't validate any modes itself and also
1230 * doesn't prune any invalid modes. Callers need to do that themselves.
Dave Airlief453ba02008-11-07 14:05:41 -08001231 */
Ville Syrjälä6af3e652015-12-03 23:14:14 +02001232void drm_mode_connector_list_update(struct drm_connector *connector)
Dave Airlief453ba02008-11-07 14:05:41 -08001233{
Dave Airlief453ba02008-11-07 14:05:41 -08001234 struct drm_display_mode *pmode, *pt;
Dave Airlief453ba02008-11-07 14:05:41 -08001235
Daniel Vetter63951382014-01-23 15:14:15 +01001236 WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex));
1237
Ville Syrjälä2f8c19e2015-12-03 23:14:12 +02001238 list_for_each_entry_safe(pmode, pt, &connector->probed_modes, head) {
1239 struct drm_display_mode *mode;
1240 bool found_it = false;
1241
Dave Airlief453ba02008-11-07 14:05:41 -08001242 /* go through current modes checking for the new probed mode */
1243 list_for_each_entry(mode, &connector->modes, head) {
Ville Syrjälä2f8c19e2015-12-03 23:14:12 +02001244 if (!drm_mode_equal(pmode, mode))
1245 continue;
1246
1247 found_it = true;
Ville Syrjäläfc245f82015-12-04 15:13:01 +02001248
1249 /*
1250 * If the old matching mode is stale (ie. left over
1251 * from a previous probe) just replace it outright.
1252 * Otherwise just merge the type bits between all
1253 * equal probed modes.
1254 *
1255 * If two probed modes are considered equal, pick the
1256 * actual timings from the one that's marked as
1257 * preferred (in case the match isn't 100%). If
1258 * multiple or zero preferred modes are present, favor
1259 * the mode added to the probed_modes list first.
1260 */
1261 if (mode->status == MODE_STALE) {
1262 drm_mode_copy(mode, pmode);
1263 } else if ((mode->type & DRM_MODE_TYPE_PREFERRED) == 0 &&
1264 (pmode->type & DRM_MODE_TYPE_PREFERRED) != 0) {
Ville Syrjälä6af3e652015-12-03 23:14:14 +02001265 pmode->type |= mode->type;
Ville Syrjäläfc245f82015-12-04 15:13:01 +02001266 drm_mode_copy(mode, pmode);
1267 } else {
Ville Syrjälä6af3e652015-12-03 23:14:14 +02001268 mode->type |= pmode->type;
Ville Syrjäläfc245f82015-12-04 15:13:01 +02001269 }
1270
Ville Syrjälä2f8c19e2015-12-03 23:14:12 +02001271 list_del(&pmode->head);
1272 drm_mode_destroy(connector->dev, pmode);
1273 break;
Dave Airlief453ba02008-11-07 14:05:41 -08001274 }
1275
1276 if (!found_it) {
1277 list_move_tail(&pmode->head, &connector->modes);
1278 }
1279 }
1280}
1281EXPORT_SYMBOL(drm_mode_connector_list_update);
Chris Wilson1794d252011-04-17 07:43:32 +01001282
1283/**
Daniel Vetterf5aabb92014-01-23 20:05:00 +01001284 * drm_mode_parse_command_line_for_connector - parse command line modeline for connector
1285 * @mode_option: optional per connector mode option
1286 * @connector: connector to parse modeline for
1287 * @mode: preallocated drm_cmdline_mode structure to fill out
Chris Wilson1794d252011-04-17 07:43:32 +01001288 *
Daniel Vetterf5aabb92014-01-23 20:05:00 +01001289 * This parses @mode_option command line modeline for modes and options to
1290 * configure the connector. If @mode_option is NULL the default command line
1291 * modeline in fb_mode_option will be parsed instead.
Chris Wilson1794d252011-04-17 07:43:32 +01001292 *
Daniel Vetterf5aabb92014-01-23 20:05:00 +01001293 * This uses the same parameters as the fb modedb.c, except for an extra
1294 * force-enable, force-enable-digital and force-disable bit at the end:
1295 *
Danilo Cesar Lemes de Paulaf03d8ed2015-11-25 18:07:55 +01001296 * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd]
Chris Wilson1794d252011-04-17 07:43:32 +01001297 *
Daniel Vetterf5aabb92014-01-23 20:05:00 +01001298 * The intermediate drm_cmdline_mode structure is required to store additional
Yannick Guerrini2a97acd2015-03-04 09:30:09 +01001299 * options from the command line modline like the force-enable/disable flag.
Daniel Vetterf5aabb92014-01-23 20:05:00 +01001300 *
1301 * Returns:
1302 * True if a valid modeline has been parsed, false otherwise.
Chris Wilson1794d252011-04-17 07:43:32 +01001303 */
1304bool drm_mode_parse_command_line_for_connector(const char *mode_option,
1305 struct drm_connector *connector,
1306 struct drm_cmdline_mode *mode)
1307{
1308 const char *name;
1309 unsigned int namelen;
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001310 bool res_specified = false, bpp_specified = false, refresh_specified = false;
Chris Wilson1794d252011-04-17 07:43:32 +01001311 unsigned int xres = 0, yres = 0, bpp = 32, refresh = 0;
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001312 bool yres_specified = false, cvt = false, rb = false;
1313 bool interlace = false, margins = false, was_digit = false;
LABBE Corentind6e6e142015-12-11 13:58:59 +01001314 int i;
Chris Wilson1794d252011-04-17 07:43:32 +01001315 enum drm_connector_force force = DRM_FORCE_UNSPECIFIED;
1316
Dave Airliecb3c4382011-05-04 13:08:58 +10001317#ifdef CONFIG_FB
Chris Wilson1794d252011-04-17 07:43:32 +01001318 if (!mode_option)
1319 mode_option = fb_mode_option;
Dave Airliecb3c4382011-05-04 13:08:58 +10001320#endif
Chris Wilson1794d252011-04-17 07:43:32 +01001321
1322 if (!mode_option) {
1323 mode->specified = false;
1324 return false;
1325 }
1326
1327 name = mode_option;
1328 namelen = strlen(name);
1329 for (i = namelen-1; i >= 0; i--) {
1330 switch (name[i]) {
1331 case '@':
Chris Wilson1794d252011-04-17 07:43:32 +01001332 if (!refresh_specified && !bpp_specified &&
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001333 !yres_specified && !cvt && !rb && was_digit) {
LABBE Corentind6e6e142015-12-11 13:58:59 +01001334 refresh = simple_strtol(&name[i+1], NULL, 10);
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001335 refresh_specified = true;
1336 was_digit = false;
Chris Wilson1794d252011-04-17 07:43:32 +01001337 } else
1338 goto done;
1339 break;
1340 case '-':
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001341 if (!bpp_specified && !yres_specified && !cvt &&
1342 !rb && was_digit) {
LABBE Corentind6e6e142015-12-11 13:58:59 +01001343 bpp = simple_strtol(&name[i+1], NULL, 10);
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001344 bpp_specified = true;
1345 was_digit = false;
Chris Wilson1794d252011-04-17 07:43:32 +01001346 } else
1347 goto done;
1348 break;
1349 case 'x':
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001350 if (!yres_specified && was_digit) {
LABBE Corentind6e6e142015-12-11 13:58:59 +01001351 yres = simple_strtol(&name[i+1], NULL, 10);
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001352 yres_specified = true;
1353 was_digit = false;
Chris Wilson1794d252011-04-17 07:43:32 +01001354 } else
1355 goto done;
Damien Lespiau97fbfbf2013-05-08 17:03:30 +01001356 break;
Chris Wilson1794d252011-04-17 07:43:32 +01001357 case '0' ... '9':
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001358 was_digit = true;
Chris Wilson1794d252011-04-17 07:43:32 +01001359 break;
1360 case 'M':
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001361 if (yres_specified || cvt || was_digit)
1362 goto done;
1363 cvt = true;
Chris Wilson1794d252011-04-17 07:43:32 +01001364 break;
1365 case 'R':
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001366 if (yres_specified || cvt || rb || was_digit)
1367 goto done;
1368 rb = true;
Chris Wilson1794d252011-04-17 07:43:32 +01001369 break;
1370 case 'm':
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001371 if (cvt || yres_specified || was_digit)
1372 goto done;
1373 margins = true;
Chris Wilson1794d252011-04-17 07:43:32 +01001374 break;
1375 case 'i':
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001376 if (cvt || yres_specified || was_digit)
1377 goto done;
1378 interlace = true;
Chris Wilson1794d252011-04-17 07:43:32 +01001379 break;
1380 case 'e':
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001381 if (yres_specified || bpp_specified || refresh_specified ||
1382 was_digit || (force != DRM_FORCE_UNSPECIFIED))
1383 goto done;
1384
Chris Wilson1794d252011-04-17 07:43:32 +01001385 force = DRM_FORCE_ON;
1386 break;
1387 case 'D':
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001388 if (yres_specified || bpp_specified || refresh_specified ||
1389 was_digit || (force != DRM_FORCE_UNSPECIFIED))
1390 goto done;
1391
Chris Wilson1794d252011-04-17 07:43:32 +01001392 if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) &&
1393 (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB))
1394 force = DRM_FORCE_ON;
1395 else
1396 force = DRM_FORCE_ON_DIGITAL;
1397 break;
1398 case 'd':
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001399 if (yres_specified || bpp_specified || refresh_specified ||
1400 was_digit || (force != DRM_FORCE_UNSPECIFIED))
1401 goto done;
1402
Chris Wilson1794d252011-04-17 07:43:32 +01001403 force = DRM_FORCE_OFF;
1404 break;
1405 default:
1406 goto done;
1407 }
1408 }
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001409
Chris Wilson1794d252011-04-17 07:43:32 +01001410 if (i < 0 && yres_specified) {
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001411 char *ch;
1412 xres = simple_strtol(name, &ch, 10);
1413 if ((ch != NULL) && (*ch == 'x'))
1414 res_specified = true;
1415 else
1416 i = ch - name;
1417 } else if (!yres_specified && was_digit) {
1418 /* catch mode that begins with digits but has no 'x' */
1419 i = 0;
Chris Wilson1794d252011-04-17 07:43:32 +01001420 }
1421done:
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001422 if (i >= 0) {
LABBE Corentin67fe85d2016-02-04 15:03:52 +01001423 pr_warn("[drm] parse error at position %i in video mode '%s'\n",
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001424 i, name);
1425 mode->specified = false;
1426 return false;
1427 }
1428
Chris Wilson1794d252011-04-17 07:43:32 +01001429 if (res_specified) {
1430 mode->specified = true;
1431 mode->xres = xres;
1432 mode->yres = yres;
1433 }
1434
1435 if (refresh_specified) {
1436 mode->refresh_specified = true;
1437 mode->refresh = refresh;
1438 }
1439
1440 if (bpp_specified) {
1441 mode->bpp_specified = true;
1442 mode->bpp = bpp;
1443 }
Rolf Eike Beer04fee892011-06-15 11:27:02 +02001444 mode->rb = rb;
1445 mode->cvt = cvt;
1446 mode->interlace = interlace;
1447 mode->margins = margins;
Chris Wilson1794d252011-04-17 07:43:32 +01001448 mode->force = force;
1449
1450 return true;
1451}
1452EXPORT_SYMBOL(drm_mode_parse_command_line_for_connector);
1453
Daniel Vetterf5aabb92014-01-23 20:05:00 +01001454/**
1455 * drm_mode_create_from_cmdline_mode - convert a command line modeline into a DRM display mode
1456 * @dev: DRM device to create the new mode for
1457 * @cmd: input command line modeline
1458 *
1459 * Returns:
1460 * Pointer to converted mode on success, NULL on error.
1461 */
Chris Wilson1794d252011-04-17 07:43:32 +01001462struct drm_display_mode *
1463drm_mode_create_from_cmdline_mode(struct drm_device *dev,
1464 struct drm_cmdline_mode *cmd)
1465{
1466 struct drm_display_mode *mode;
1467
1468 if (cmd->cvt)
1469 mode = drm_cvt_mode(dev,
1470 cmd->xres, cmd->yres,
1471 cmd->refresh_specified ? cmd->refresh : 60,
1472 cmd->rb, cmd->interlace,
1473 cmd->margins);
1474 else
1475 mode = drm_gtf_mode(dev,
1476 cmd->xres, cmd->yres,
1477 cmd->refresh_specified ? cmd->refresh : 60,
1478 cmd->interlace,
1479 cmd->margins);
1480 if (!mode)
1481 return NULL;
1482
Chris Wilsoneaf99c72014-08-06 10:08:32 +02001483 mode->type |= DRM_MODE_TYPE_USERDEF;
Chris Wilson1794d252011-04-17 07:43:32 +01001484 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
1485 return mode;
1486}
1487EXPORT_SYMBOL(drm_mode_create_from_cmdline_mode);
Daniel Stone934a8a82015-05-22 13:34:48 +01001488
1489/**
1490 * drm_crtc_convert_to_umode - convert a drm_display_mode into a modeinfo
1491 * @out: drm_mode_modeinfo struct to return to the user
1492 * @in: drm_display_mode to use
1493 *
1494 * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to
1495 * the user.
1496 */
1497void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out,
1498 const struct drm_display_mode *in)
1499{
1500 WARN(in->hdisplay > USHRT_MAX || in->hsync_start > USHRT_MAX ||
1501 in->hsync_end > USHRT_MAX || in->htotal > USHRT_MAX ||
1502 in->hskew > USHRT_MAX || in->vdisplay > USHRT_MAX ||
1503 in->vsync_start > USHRT_MAX || in->vsync_end > USHRT_MAX ||
1504 in->vtotal > USHRT_MAX || in->vscan > USHRT_MAX,
1505 "timing values too large for mode info\n");
1506
1507 out->clock = in->clock;
1508 out->hdisplay = in->hdisplay;
1509 out->hsync_start = in->hsync_start;
1510 out->hsync_end = in->hsync_end;
1511 out->htotal = in->htotal;
1512 out->hskew = in->hskew;
1513 out->vdisplay = in->vdisplay;
1514 out->vsync_start = in->vsync_start;
1515 out->vsync_end = in->vsync_end;
1516 out->vtotal = in->vtotal;
1517 out->vscan = in->vscan;
1518 out->vrefresh = in->vrefresh;
1519 out->flags = in->flags;
1520 out->type = in->type;
1521 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN);
1522 out->name[DRM_DISPLAY_MODE_LEN-1] = 0;
1523}
1524
1525/**
1526 * drm_crtc_convert_umode - convert a modeinfo into a drm_display_mode
1527 * @out: drm_display_mode to return to the user
1528 * @in: drm_mode_modeinfo to use
1529 *
1530 * Convert a drm_mode_modeinfo into a drm_display_mode structure to return to
1531 * the caller.
1532 *
1533 * Returns:
1534 * Zero on success, negative errno on failure.
1535 */
1536int drm_mode_convert_umode(struct drm_display_mode *out,
1537 const struct drm_mode_modeinfo *in)
1538{
1539 int ret = -EINVAL;
1540
1541 if (in->clock > INT_MAX || in->vrefresh > INT_MAX) {
1542 ret = -ERANGE;
1543 goto out;
1544 }
1545
1546 if ((in->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX)
1547 goto out;
1548
1549 out->clock = in->clock;
1550 out->hdisplay = in->hdisplay;
1551 out->hsync_start = in->hsync_start;
1552 out->hsync_end = in->hsync_end;
1553 out->htotal = in->htotal;
1554 out->hskew = in->hskew;
1555 out->vdisplay = in->vdisplay;
1556 out->vsync_start = in->vsync_start;
1557 out->vsync_end = in->vsync_end;
1558 out->vtotal = in->vtotal;
1559 out->vscan = in->vscan;
1560 out->vrefresh = in->vrefresh;
1561 out->flags = in->flags;
1562 out->type = in->type;
1563 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN);
1564 out->name[DRM_DISPLAY_MODE_LEN-1] = 0;
1565
1566 out->status = drm_mode_validate_basic(out);
1567 if (out->status != MODE_OK)
1568 goto out;
1569
Tomi Valkeinenb201e742016-05-31 15:03:15 +03001570 drm_mode_set_crtcinfo(out, CRTC_INTERLACE_HALVE_V);
1571
Daniel Stone934a8a82015-05-22 13:34:48 +01001572 ret = 0;
1573
1574out:
1575 return ret;
Danilo Cesar Lemes de Paulaf03d8ed2015-11-25 18:07:55 +01001576}