1 | /* |
2 | * Copyright © 1997-2003 by The XFree86 Project, Inc. |
3 | * Copyright © 2007 Dave Airlie |
4 | * Copyright © 2007-2008 Intel Corporation |
5 | * Jesse Barnes <jesse.barnes@intel.com> |
6 | * Copyright 2005-2006 Luc Verhaegen |
7 | * Copyright (c) 2001, Andy Ritger aritger@nvidia.com |
8 | * |
9 | * Permission is hereby granted, free of charge, to any person obtaining a |
10 | * copy of this software and associated documentation files (the "Software"), |
11 | * to deal in the Software without restriction, including without limitation |
12 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
13 | * and/or sell copies of the Software, and to permit persons to whom the |
14 | * Software is furnished to do so, subject to the following conditions: |
15 | * |
16 | * The above copyright notice and this permission notice shall be included in |
17 | * all copies or substantial portions of the Software. |
18 | * |
19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
20 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
21 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
22 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
23 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
24 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
25 | * OTHER DEALINGS IN THE SOFTWARE. |
26 | * |
27 | * Except as contained in this notice, the name of the copyright holder(s) |
28 | * and author(s) shall not be used in advertising or otherwise to promote |
29 | * the sale, use or other dealings in this Software without prior written |
30 | * authorization from the copyright holder(s) and author(s). |
31 | */ |
32 | |
33 | #include <linux/list.h> |
34 | #include <linux/list_sort.h> |
35 | #include <linux/export.h> |
36 | #include <drm/drmP.h> |
37 | #include <drm/drm_crtc.h> |
38 | #ifdef CONFIG_VIDEOMODE_HELPERS |
39 | #ifdef CONFIG_OF |
40 | #include <video/of_videomode.h> |
41 | #endif |
42 | #include <video/videomode.h> |
43 | #endif |
44 | #include <drm/drm_modes.h> |
45 | |
46 | #include "drm_crtc_internal.h" |
47 | |
48 | /** |
49 | * drm_mode_debug_printmodeline - print a mode to dmesg |
50 | * @mode: mode to print |
51 | * |
52 | * Describe @mode using DRM_DEBUG. |
53 | */ |
54 | void drm_mode_debug_printmodeline(const struct drm_display_mode *mode) |
55 | { |
56 | DRM_DEBUG_KMS("Modeline %d:\"%s\" %d %d %d %d %d %d %d %d %d %d " |
57 | "0x%x 0x%x\n" , |
58 | mode->base.id, mode->name, mode->vrefresh, mode->clock, |
59 | mode->hdisplay, mode->hsync_start, |
60 | mode->hsync_end, mode->htotal, |
61 | mode->vdisplay, mode->vsync_start, |
62 | mode->vsync_end, mode->vtotal, mode->type, mode->flags); |
63 | } |
64 | EXPORT_SYMBOL(drm_mode_debug_printmodeline); |
65 | |
66 | /** |
67 | * drm_mode_create - create a new display mode |
68 | * @dev: DRM device |
69 | * |
70 | * Create a new, cleared drm_display_mode with kzalloc, allocate an ID for it |
71 | * and return it. |
72 | * |
73 | * Returns: |
74 | * Pointer to new mode on success, NULL on error. |
75 | */ |
76 | struct drm_display_mode *drm_mode_create(struct drm_device *dev) |
77 | { |
78 | struct drm_display_mode *nmode; |
79 | |
80 | nmode = kzalloc(sizeof(struct drm_display_mode), GFP_KERNEL); |
81 | if (!nmode) |
82 | return NULL; |
83 | |
84 | if (drm_mode_object_get(dev, &nmode->base, DRM_MODE_OBJECT_MODE)) { |
85 | kfree(nmode); |
86 | return NULL; |
87 | } |
88 | |
89 | return nmode; |
90 | } |
91 | EXPORT_SYMBOL(drm_mode_create); |
92 | |
93 | /** |
94 | * drm_mode_destroy - remove a mode |
95 | * @dev: DRM device |
96 | * @mode: mode to remove |
97 | * |
98 | * Release @mode's unique ID, then free it @mode structure itself using kfree. |
99 | */ |
100 | void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode) |
101 | { |
102 | if (!mode) |
103 | return; |
104 | |
105 | drm_mode_object_put(dev, &mode->base); |
106 | |
107 | kfree(mode); |
108 | } |
109 | EXPORT_SYMBOL(drm_mode_destroy); |
110 | |
111 | /** |
112 | * drm_mode_probed_add - add a mode to a connector's probed_mode list |
113 | * @connector: connector the new mode |
114 | * @mode: mode data |
115 | * |
116 | * Add @mode to @connector's probed_mode list for later use. This list should |
117 | * then in a second step get filtered and all the modes actually supported by |
118 | * the hardware moved to the @connector's modes list. |
119 | */ |
120 | void drm_mode_probed_add(struct drm_connector *connector, |
121 | struct drm_display_mode *mode) |
122 | { |
123 | WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex)); |
124 | |
125 | list_add_tail(&mode->head, &connector->probed_modes); |
126 | } |
127 | EXPORT_SYMBOL(drm_mode_probed_add); |
128 | |
129 | /** |
130 | * drm_cvt_mode -create a modeline based on the CVT algorithm |
131 | * @dev: drm device |
132 | * @hdisplay: hdisplay size |
133 | * @vdisplay: vdisplay size |
134 | * @vrefresh: vrefresh rate |
135 | * @reduced: whether to use reduced blanking |
136 | * @interlaced: whether to compute an interlaced mode |
137 | * @margins: whether to add margins (borders) |
138 | * |
139 | * This function is called to generate the modeline based on CVT algorithm |
140 | * according to the hdisplay, vdisplay, vrefresh. |
141 | * It is based from the VESA(TM) Coordinated Video Timing Generator by |
142 | * Graham Loveridge April 9, 2003 available at |
143 | * http://www.elo.utfsm.cl/~elo212/docs/CVTd6r1.xls |
144 | * |
145 | * And it is copied from xf86CVTmode in xserver/hw/xfree86/modes/xf86cvt.c. |
146 | * What I have done is to translate it by using integer calculation. |
147 | * |
148 | * Returns: |
149 | * The modeline based on the CVT algorithm stored in a drm_display_mode object. |
150 | * The display mode object is allocated with drm_mode_create(). Returns NULL |
151 | * when no mode could be allocated. |
152 | */ |
153 | struct drm_display_mode *drm_cvt_mode(struct drm_device *dev, int hdisplay, |
154 | int vdisplay, int vrefresh, |
155 | bool reduced, bool interlaced, bool margins) |
156 | { |
157 | #define HV_FACTOR 1000 |
158 | /* 1) top/bottom margin size (% of height) - default: 1.8, */ |
159 | #define CVT_MARGIN_PERCENTAGE 18 |
160 | /* 2) character cell horizontal granularity (pixels) - default 8 */ |
161 | #define CVT_H_GRANULARITY 8 |
162 | /* 3) Minimum vertical porch (lines) - default 3 */ |
163 | #define CVT_MIN_V_PORCH 3 |
164 | /* 4) Minimum number of vertical back porch lines - default 6 */ |
165 | #define CVT_MIN_V_BPORCH 6 |
166 | /* Pixel Clock step (kHz) */ |
167 | #define CVT_CLOCK_STEP 250 |
168 | struct drm_display_mode *drm_mode; |
169 | unsigned int vfieldrate, hperiod; |
170 | int hdisplay_rnd, hmargin, vdisplay_rnd, vmargin, vsync; |
171 | int interlace; |
172 | |
173 | /* allocate the drm_display_mode structure. If failure, we will |
174 | * return directly |
175 | */ |
176 | drm_mode = drm_mode_create(dev); |
177 | if (!drm_mode) |
178 | return NULL; |
179 | |
180 | /* the CVT default refresh rate is 60Hz */ |
181 | if (!vrefresh) |
182 | vrefresh = 60; |
183 | |
184 | /* the required field fresh rate */ |
185 | if (interlaced) |
186 | vfieldrate = vrefresh * 2; |
187 | else |
188 | vfieldrate = vrefresh; |
189 | |
190 | /* horizontal pixels */ |
191 | hdisplay_rnd = hdisplay - (hdisplay % CVT_H_GRANULARITY); |
192 | |
193 | /* determine the left&right borders */ |
194 | hmargin = 0; |
195 | if (margins) { |
196 | hmargin = hdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000; |
197 | hmargin -= hmargin % CVT_H_GRANULARITY; |
198 | } |
199 | /* find the total active pixels */ |
200 | drm_mode->hdisplay = hdisplay_rnd + 2 * hmargin; |
201 | |
202 | /* find the number of lines per field */ |
203 | if (interlaced) |
204 | vdisplay_rnd = vdisplay / 2; |
205 | else |
206 | vdisplay_rnd = vdisplay; |
207 | |
208 | /* find the top & bottom borders */ |
209 | vmargin = 0; |
210 | if (margins) |
211 | vmargin = vdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000; |
212 | |
213 | drm_mode->vdisplay = vdisplay + 2 * vmargin; |
214 | |
215 | /* Interlaced */ |
216 | if (interlaced) |
217 | interlace = 1; |
218 | else |
219 | interlace = 0; |
220 | |
221 | /* Determine VSync Width from aspect ratio */ |
222 | if (!(vdisplay % 3) && ((vdisplay * 4 / 3) == hdisplay)) |
223 | vsync = 4; |
224 | else if (!(vdisplay % 9) && ((vdisplay * 16 / 9) == hdisplay)) |
225 | vsync = 5; |
226 | else if (!(vdisplay % 10) && ((vdisplay * 16 / 10) == hdisplay)) |
227 | vsync = 6; |
228 | else if (!(vdisplay % 4) && ((vdisplay * 5 / 4) == hdisplay)) |
229 | vsync = 7; |
230 | else if (!(vdisplay % 9) && ((vdisplay * 15 / 9) == hdisplay)) |
231 | vsync = 7; |
232 | else /* custom */ |
233 | vsync = 10; |
234 | |
235 | if (!reduced) { |
236 | /* simplify the GTF calculation */ |
237 | /* 4) Minimum time of vertical sync + back porch interval (µs) |
238 | * default 550.0 |
239 | */ |
240 | int tmp1, tmp2; |
241 | #define CVT_MIN_VSYNC_BP 550 |
242 | /* 3) Nominal HSync width (% of line period) - default 8 */ |
243 | #define CVT_HSYNC_PERCENTAGE 8 |
244 | unsigned int hblank_percentage; |
245 | int vsyncandback_porch, vback_porch __unused, hblank; |
246 | |
247 | /* estimated the horizontal period */ |
248 | tmp1 = HV_FACTOR * 1000000 - |
249 | CVT_MIN_VSYNC_BP * HV_FACTOR * vfieldrate; |
250 | tmp2 = (vdisplay_rnd + 2 * vmargin + CVT_MIN_V_PORCH) * 2 + |
251 | interlace; |
252 | hperiod = tmp1 * 2 / (tmp2 * vfieldrate); |
253 | |
254 | tmp1 = CVT_MIN_VSYNC_BP * HV_FACTOR / hperiod + 1; |
255 | /* 9. Find number of lines in sync + backporch */ |
256 | if (tmp1 < (vsync + CVT_MIN_V_PORCH)) |
257 | vsyncandback_porch = vsync + CVT_MIN_V_PORCH; |
258 | else |
259 | vsyncandback_porch = tmp1; |
260 | /* 10. Find number of lines in back porch */ |
261 | vback_porch = vsyncandback_porch - vsync; |
262 | drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + |
263 | vsyncandback_porch + CVT_MIN_V_PORCH; |
264 | /* 5) Definition of Horizontal blanking time limitation */ |
265 | /* Gradient (%/kHz) - default 600 */ |
266 | #define CVT_M_FACTOR 600 |
267 | /* Offset (%) - default 40 */ |
268 | #define CVT_C_FACTOR 40 |
269 | /* Blanking time scaling factor - default 128 */ |
270 | #define CVT_K_FACTOR 128 |
271 | /* Scaling factor weighting - default 20 */ |
272 | #define CVT_J_FACTOR 20 |
273 | #define CVT_M_PRIME (CVT_M_FACTOR * CVT_K_FACTOR / 256) |
274 | #define CVT_C_PRIME ((CVT_C_FACTOR - CVT_J_FACTOR) * CVT_K_FACTOR / 256 + \ |
275 | CVT_J_FACTOR) |
276 | /* 12. Find ideal blanking duty cycle from formula */ |
277 | hblank_percentage = CVT_C_PRIME * HV_FACTOR - CVT_M_PRIME * |
278 | hperiod / 1000; |
279 | /* 13. Blanking time */ |
280 | if (hblank_percentage < 20 * HV_FACTOR) |
281 | hblank_percentage = 20 * HV_FACTOR; |
282 | hblank = drm_mode->hdisplay * hblank_percentage / |
283 | (100 * HV_FACTOR - hblank_percentage); |
284 | hblank -= hblank % (2 * CVT_H_GRANULARITY); |
285 | /* 14. find the total pixes per line */ |
286 | drm_mode->htotal = drm_mode->hdisplay + hblank; |
287 | drm_mode->hsync_end = drm_mode->hdisplay + hblank / 2; |
288 | drm_mode->hsync_start = drm_mode->hsync_end - |
289 | (drm_mode->htotal * CVT_HSYNC_PERCENTAGE) / 100; |
290 | drm_mode->hsync_start += CVT_H_GRANULARITY - |
291 | drm_mode->hsync_start % CVT_H_GRANULARITY; |
292 | /* fill the Vsync values */ |
293 | drm_mode->vsync_start = drm_mode->vdisplay + CVT_MIN_V_PORCH; |
294 | drm_mode->vsync_end = drm_mode->vsync_start + vsync; |
295 | } else { |
296 | /* Reduced blanking */ |
297 | /* Minimum vertical blanking interval time (µs)- default 460 */ |
298 | #define CVT_RB_MIN_VBLANK 460 |
299 | /* Fixed number of clocks for horizontal sync */ |
300 | #define CVT_RB_H_SYNC 32 |
301 | /* Fixed number of clocks for horizontal blanking */ |
302 | #define CVT_RB_H_BLANK 160 |
303 | /* Fixed number of lines for vertical front porch - default 3*/ |
304 | #define CVT_RB_VFPORCH 3 |
305 | int vbilines; |
306 | int tmp1, tmp2; |
307 | /* 8. Estimate Horizontal period. */ |
308 | tmp1 = HV_FACTOR * 1000000 - |
309 | CVT_RB_MIN_VBLANK * HV_FACTOR * vfieldrate; |
310 | tmp2 = vdisplay_rnd + 2 * vmargin; |
311 | hperiod = tmp1 / (tmp2 * vfieldrate); |
312 | /* 9. Find number of lines in vertical blanking */ |
313 | vbilines = CVT_RB_MIN_VBLANK * HV_FACTOR / hperiod + 1; |
314 | /* 10. Check if vertical blanking is sufficient */ |
315 | if (vbilines < (CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH)) |
316 | vbilines = CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH; |
317 | /* 11. Find total number of lines in vertical field */ |
318 | drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + vbilines; |
319 | /* 12. Find total number of pixels in a line */ |
320 | drm_mode->htotal = drm_mode->hdisplay + CVT_RB_H_BLANK; |
321 | /* Fill in HSync values */ |
322 | drm_mode->hsync_end = drm_mode->hdisplay + CVT_RB_H_BLANK / 2; |
323 | drm_mode->hsync_start = drm_mode->hsync_end - CVT_RB_H_SYNC; |
324 | /* Fill in VSync values */ |
325 | drm_mode->vsync_start = drm_mode->vdisplay + CVT_RB_VFPORCH; |
326 | drm_mode->vsync_end = drm_mode->vsync_start + vsync; |
327 | } |
328 | /* 15/13. Find pixel clock frequency (kHz for xf86) */ |
329 | drm_mode->clock = drm_mode->htotal * HV_FACTOR * 1000 / hperiod; |
330 | drm_mode->clock -= drm_mode->clock % CVT_CLOCK_STEP; |
331 | /* 18/16. Find actual vertical frame frequency */ |
332 | /* ignore - just set the mode flag for interlaced */ |
333 | if (interlaced) { |
334 | drm_mode->vtotal *= 2; |
335 | drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; |
336 | } |
337 | /* Fill the mode line name */ |
338 | drm_mode_set_name(drm_mode); |
339 | if (reduced) |
340 | drm_mode->flags |= (DRM_MODE_FLAG_PHSYNC | |
341 | DRM_MODE_FLAG_NVSYNC); |
342 | else |
343 | drm_mode->flags |= (DRM_MODE_FLAG_PVSYNC | |
344 | DRM_MODE_FLAG_NHSYNC); |
345 | |
346 | return drm_mode; |
347 | } |
348 | EXPORT_SYMBOL(drm_cvt_mode); |
349 | |
350 | /** |
351 | * drm_gtf_mode_complex - create the modeline based on the full GTF algorithm |
352 | * @dev: drm device |
353 | * @hdisplay: hdisplay size |
354 | * @vdisplay: vdisplay size |
355 | * @vrefresh: vrefresh rate. |
356 | * @interlaced: whether to compute an interlaced mode |
357 | * @margins: desired margin (borders) size |
358 | * @GTF_M: extended GTF formula parameters |
359 | * @GTF_2C: extended GTF formula parameters |
360 | * @GTF_K: extended GTF formula parameters |
361 | * @GTF_2J: extended GTF formula parameters |
362 | * |
363 | * GTF feature blocks specify C and J in multiples of 0.5, so we pass them |
364 | * in here multiplied by two. For a C of 40, pass in 80. |
365 | * |
366 | * Returns: |
367 | * The modeline based on the full GTF algorithm stored in a drm_display_mode object. |
368 | * The display mode object is allocated with drm_mode_create(). Returns NULL |
369 | * when no mode could be allocated. |
370 | */ |
371 | struct drm_display_mode * |
372 | drm_gtf_mode_complex(struct drm_device *dev, int hdisplay, int vdisplay, |
373 | int vrefresh, bool interlaced, int margins, |
374 | int GTF_M, int GTF_2C, int GTF_K, int GTF_2J) |
375 | { /* 1) top/bottom margin size (% of height) - default: 1.8, */ |
376 | #define GTF_MARGIN_PERCENTAGE 18 |
377 | /* 2) character cell horizontal granularity (pixels) - default 8 */ |
378 | #define GTF_CELL_GRAN 8 |
379 | /* 3) Minimum vertical porch (lines) - default 3 */ |
380 | #define GTF_MIN_V_PORCH 1 |
381 | /* width of vsync in lines */ |
382 | #define V_SYNC_RQD 3 |
383 | /* width of hsync as % of total line */ |
384 | #define H_SYNC_PERCENT 8 |
385 | /* min time of vsync + back porch (microsec) */ |
386 | #define MIN_VSYNC_PLUS_BP 550 |
387 | /* C' and M' are part of the Blanking Duty Cycle computation */ |
388 | #define GTF_C_PRIME ((((GTF_2C - GTF_2J) * GTF_K / 256) + GTF_2J) / 2) |
389 | #define GTF_M_PRIME (GTF_K * GTF_M / 256) |
390 | struct drm_display_mode *drm_mode; |
391 | unsigned int hdisplay_rnd, vdisplay_rnd, vfieldrate_rqd; |
392 | int top_margin, bottom_margin; |
393 | int interlace; |
394 | unsigned int hfreq_est; |
395 | int vsync_plus_bp, vback_porch __unused; |
396 | unsigned int vtotal_lines, vfieldrate_est __unused, hperiod __unused; |
397 | unsigned int vfield_rate, vframe_rate __unused; |
398 | int left_margin, right_margin; |
399 | unsigned int total_active_pixels, ideal_duty_cycle; |
400 | unsigned int hblank, total_pixels, pixel_freq; |
401 | int hsync, hfront_porch, vodd_front_porch_lines; |
402 | unsigned int tmp1, tmp2; |
403 | |
404 | drm_mode = drm_mode_create(dev); |
405 | if (!drm_mode) |
406 | return NULL; |
407 | |
408 | /* 1. In order to give correct results, the number of horizontal |
409 | * pixels requested is first processed to ensure that it is divisible |
410 | * by the character size, by rounding it to the nearest character |
411 | * cell boundary: |
412 | */ |
413 | hdisplay_rnd = (hdisplay + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; |
414 | hdisplay_rnd = hdisplay_rnd * GTF_CELL_GRAN; |
415 | |
416 | /* 2. If interlace is requested, the number of vertical lines assumed |
417 | * by the calculation must be halved, as the computation calculates |
418 | * the number of vertical lines per field. |
419 | */ |
420 | if (interlaced) |
421 | vdisplay_rnd = vdisplay / 2; |
422 | else |
423 | vdisplay_rnd = vdisplay; |
424 | |
425 | /* 3. Find the frame rate required: */ |
426 | if (interlaced) |
427 | vfieldrate_rqd = vrefresh * 2; |
428 | else |
429 | vfieldrate_rqd = vrefresh; |
430 | |
431 | /* 4. Find number of lines in Top margin: */ |
432 | top_margin = 0; |
433 | if (margins) |
434 | top_margin = (vdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / |
435 | 1000; |
436 | /* 5. Find number of lines in bottom margin: */ |
437 | bottom_margin = top_margin; |
438 | |
439 | /* 6. If interlace is required, then set variable interlace: */ |
440 | if (interlaced) |
441 | interlace = 1; |
442 | else |
443 | interlace = 0; |
444 | |
445 | /* 7. Estimate the Horizontal frequency */ |
446 | { |
447 | tmp1 = (1000000 - MIN_VSYNC_PLUS_BP * vfieldrate_rqd) / 500; |
448 | tmp2 = (vdisplay_rnd + 2 * top_margin + GTF_MIN_V_PORCH) * |
449 | 2 + interlace; |
450 | hfreq_est = (tmp2 * 1000 * vfieldrate_rqd) / tmp1; |
451 | } |
452 | |
453 | /* 8. Find the number of lines in V sync + back porch */ |
454 | /* [V SYNC+BP] = RINT(([MIN VSYNC+BP] * hfreq_est / 1000000)) */ |
455 | vsync_plus_bp = MIN_VSYNC_PLUS_BP * hfreq_est / 1000; |
456 | vsync_plus_bp = (vsync_plus_bp + 500) / 1000; |
457 | /* 9. Find the number of lines in V back porch alone: */ |
458 | vback_porch = vsync_plus_bp - V_SYNC_RQD; |
459 | /* 10. Find the total number of lines in Vertical field period: */ |
460 | vtotal_lines = vdisplay_rnd + top_margin + bottom_margin + |
461 | vsync_plus_bp + GTF_MIN_V_PORCH; |
462 | /* 11. Estimate the Vertical field frequency: */ |
463 | vfieldrate_est = hfreq_est / vtotal_lines; |
464 | /* 12. Find the actual horizontal period: */ |
465 | hperiod = 1000000 / (vfieldrate_rqd * vtotal_lines); |
466 | |
467 | /* 13. Find the actual Vertical field frequency: */ |
468 | vfield_rate = hfreq_est / vtotal_lines; |
469 | /* 14. Find the Vertical frame frequency: */ |
470 | if (interlaced) |
471 | vframe_rate = vfield_rate / 2; |
472 | else |
473 | vframe_rate = vfield_rate; |
474 | /* 15. Find number of pixels in left margin: */ |
475 | if (margins) |
476 | left_margin = (hdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / |
477 | 1000; |
478 | else |
479 | left_margin = 0; |
480 | |
481 | /* 16.Find number of pixels in right margin: */ |
482 | right_margin = left_margin; |
483 | /* 17.Find total number of active pixels in image and left and right */ |
484 | total_active_pixels = hdisplay_rnd + left_margin + right_margin; |
485 | /* 18.Find the ideal blanking duty cycle from blanking duty cycle */ |
486 | ideal_duty_cycle = GTF_C_PRIME * 1000 - |
487 | (GTF_M_PRIME * 1000000 / hfreq_est); |
488 | /* 19.Find the number of pixels in the blanking time to the nearest |
489 | * double character cell: */ |
490 | hblank = total_active_pixels * ideal_duty_cycle / |
491 | (100000 - ideal_duty_cycle); |
492 | hblank = (hblank + GTF_CELL_GRAN) / (2 * GTF_CELL_GRAN); |
493 | hblank = hblank * 2 * GTF_CELL_GRAN; |
494 | /* 20.Find total number of pixels: */ |
495 | total_pixels = total_active_pixels + hblank; |
496 | /* 21.Find pixel clock frequency: */ |
497 | pixel_freq = total_pixels * hfreq_est / 1000; |
498 | /* Stage 1 computations are now complete; I should really pass |
499 | * the results to another function and do the Stage 2 computations, |
500 | * but I only need a few more values so I'll just append the |
501 | * computations here for now */ |
502 | /* 17. Find the number of pixels in the horizontal sync period: */ |
503 | hsync = H_SYNC_PERCENT * total_pixels / 100; |
504 | hsync = (hsync + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; |
505 | hsync = hsync * GTF_CELL_GRAN; |
506 | /* 18. Find the number of pixels in horizontal front porch period */ |
507 | hfront_porch = hblank / 2 - hsync; |
508 | /* 36. Find the number of lines in the odd front porch period: */ |
509 | vodd_front_porch_lines = GTF_MIN_V_PORCH ; |
510 | |
511 | /* finally, pack the results in the mode struct */ |
512 | drm_mode->hdisplay = hdisplay_rnd; |
513 | drm_mode->hsync_start = hdisplay_rnd + hfront_porch; |
514 | drm_mode->hsync_end = drm_mode->hsync_start + hsync; |
515 | drm_mode->htotal = total_pixels; |
516 | drm_mode->vdisplay = vdisplay_rnd; |
517 | drm_mode->vsync_start = vdisplay_rnd + vodd_front_porch_lines; |
518 | drm_mode->vsync_end = drm_mode->vsync_start + V_SYNC_RQD; |
519 | drm_mode->vtotal = vtotal_lines; |
520 | |
521 | drm_mode->clock = pixel_freq; |
522 | |
523 | if (interlaced) { |
524 | drm_mode->vtotal *= 2; |
525 | drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; |
526 | } |
527 | |
528 | drm_mode_set_name(drm_mode); |
529 | if (GTF_M == 600 && GTF_2C == 80 && GTF_K == 128 && GTF_2J == 40) |
530 | drm_mode->flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC; |
531 | else |
532 | drm_mode->flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC; |
533 | |
534 | return drm_mode; |
535 | } |
536 | EXPORT_SYMBOL(drm_gtf_mode_complex); |
537 | |
538 | /** |
539 | * drm_gtf_mode - create the modeline based on the GTF algorithm |
540 | * @dev: drm device |
541 | * @hdisplay: hdisplay size |
542 | * @vdisplay: vdisplay size |
543 | * @vrefresh: vrefresh rate. |
544 | * @interlaced: whether to compute an interlaced mode |
545 | * @margins: desired margin (borders) size |
546 | * |
547 | * return the modeline based on GTF algorithm |
548 | * |
549 | * This function is to create the modeline based on the GTF algorithm. |
550 | * Generalized Timing Formula is derived from: |
551 | * GTF Spreadsheet by Andy Morrish (1/5/97) |
552 | * available at http://www.vesa.org |
553 | * |
554 | * And it is copied from the file of xserver/hw/xfree86/modes/xf86gtf.c. |
555 | * What I have done is to translate it by using integer calculation. |
556 | * I also refer to the function of fb_get_mode in the file of |
557 | * drivers/video/fbmon.c |
558 | * |
559 | * Standard GTF parameters: |
560 | * M = 600 |
561 | * C = 40 |
562 | * K = 128 |
563 | * J = 20 |
564 | * |
565 | * Returns: |
566 | * The modeline based on the GTF algorithm stored in a drm_display_mode object. |
567 | * The display mode object is allocated with drm_mode_create(). Returns NULL |
568 | * when no mode could be allocated. |
569 | */ |
570 | struct drm_display_mode * |
571 | drm_gtf_mode(struct drm_device *dev, int hdisplay, int vdisplay, int vrefresh, |
572 | bool interlaced, int margins) |
573 | { |
574 | return drm_gtf_mode_complex(dev, hdisplay, vdisplay, vrefresh, |
575 | interlaced, margins, |
576 | 600, 40 * 2, 128, 20 * 2); |
577 | } |
578 | EXPORT_SYMBOL(drm_gtf_mode); |
579 | |
580 | #ifdef CONFIG_VIDEOMODE_HELPERS |
581 | /** |
582 | * drm_display_mode_from_videomode - fill in @dmode using @vm, |
583 | * @vm: videomode structure to use as source |
584 | * @dmode: drm_display_mode structure to use as destination |
585 | * |
586 | * Fills out @dmode using the display mode specified in @vm. |
587 | */ |
588 | void drm_display_mode_from_videomode(const struct videomode *vm, |
589 | struct drm_display_mode *dmode) |
590 | { |
591 | dmode->hdisplay = vm->hactive; |
592 | dmode->hsync_start = dmode->hdisplay + vm->hfront_porch; |
593 | dmode->hsync_end = dmode->hsync_start + vm->hsync_len; |
594 | dmode->htotal = dmode->hsync_end + vm->hback_porch; |
595 | |
596 | dmode->vdisplay = vm->vactive; |
597 | dmode->vsync_start = dmode->vdisplay + vm->vfront_porch; |
598 | dmode->vsync_end = dmode->vsync_start + vm->vsync_len; |
599 | dmode->vtotal = dmode->vsync_end + vm->vback_porch; |
600 | |
601 | dmode->clock = vm->pixelclock / 1000; |
602 | |
603 | dmode->flags = 0; |
604 | if (vm->flags & DISPLAY_FLAGS_HSYNC_HIGH) |
605 | dmode->flags |= DRM_MODE_FLAG_PHSYNC; |
606 | else if (vm->flags & DISPLAY_FLAGS_HSYNC_LOW) |
607 | dmode->flags |= DRM_MODE_FLAG_NHSYNC; |
608 | if (vm->flags & DISPLAY_FLAGS_VSYNC_HIGH) |
609 | dmode->flags |= DRM_MODE_FLAG_PVSYNC; |
610 | else if (vm->flags & DISPLAY_FLAGS_VSYNC_LOW) |
611 | dmode->flags |= DRM_MODE_FLAG_NVSYNC; |
612 | if (vm->flags & DISPLAY_FLAGS_INTERLACED) |
613 | dmode->flags |= DRM_MODE_FLAG_INTERLACE; |
614 | if (vm->flags & DISPLAY_FLAGS_DOUBLESCAN) |
615 | dmode->flags |= DRM_MODE_FLAG_DBLSCAN; |
616 | if (vm->flags & DISPLAY_FLAGS_DOUBLECLK) |
617 | dmode->flags |= DRM_MODE_FLAG_DBLCLK; |
618 | drm_mode_set_name(dmode); |
619 | } |
620 | EXPORT_SYMBOL_GPL(drm_display_mode_from_videomode); |
621 | |
622 | #ifdef CONFIG_OF |
623 | /** |
624 | * of_get_drm_display_mode - get a drm_display_mode from devicetree |
625 | * @np: device_node with the timing specification |
626 | * @dmode: will be set to the return value |
627 | * @index: index into the list of display timings in devicetree |
628 | * |
629 | * This function is expensive and should only be used, if only one mode is to be |
630 | * read from DT. To get multiple modes start with of_get_display_timings and |
631 | * work with that instead. |
632 | * |
633 | * Returns: |
634 | * 0 on success, a negative errno code when no of videomode node was found. |
635 | */ |
636 | int of_get_drm_display_mode(struct device_node *np, |
637 | struct drm_display_mode *dmode, int index) |
638 | { |
639 | struct videomode vm; |
640 | int ret; |
641 | |
642 | ret = of_get_videomode(np, &vm, index); |
643 | if (ret) |
644 | return ret; |
645 | |
646 | drm_display_mode_from_videomode(&vm, dmode); |
647 | |
648 | pr_debug("%s: got %dx%d display mode from %s\n" , |
649 | of_node_full_name(np), vm.hactive, vm.vactive, np->name); |
650 | drm_mode_debug_printmodeline(dmode); |
651 | |
652 | return 0; |
653 | } |
654 | EXPORT_SYMBOL_GPL(of_get_drm_display_mode); |
655 | #endif /* CONFIG_OF */ |
656 | #endif /* CONFIG_VIDEOMODE_HELPERS */ |
657 | |
658 | /** |
659 | * drm_mode_set_name - set the name on a mode |
660 | * @mode: name will be set in this mode |
661 | * |
662 | * Set the name of @mode to a standard format which is <hdisplay>x<vdisplay> |
663 | * with an optional 'i' suffix for interlaced modes. |
664 | */ |
665 | void drm_mode_set_name(struct drm_display_mode *mode) |
666 | { |
667 | bool interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE); |
668 | |
669 | snprintf(mode->name, DRM_DISPLAY_MODE_LEN, "%dx%d%s" , |
670 | mode->hdisplay, mode->vdisplay, |
671 | interlaced ? "i" : "" ); |
672 | } |
673 | EXPORT_SYMBOL(drm_mode_set_name); |
674 | |
675 | /** drm_mode_hsync - get the hsync of a mode |
676 | * @mode: mode |
677 | * |
678 | * Returns: |
679 | * @modes's hsync rate in kHz, rounded to the nearest integer. Calculates the |
680 | * value first if it is not yet set. |
681 | */ |
682 | int drm_mode_hsync(const struct drm_display_mode *mode) |
683 | { |
684 | unsigned int calc_val; |
685 | |
686 | if (mode->hsync) |
687 | return mode->hsync; |
688 | |
689 | if (mode->htotal < 0) |
690 | return 0; |
691 | |
692 | calc_val = (mode->clock * 1000) / mode->htotal; /* hsync in Hz */ |
693 | calc_val += 500; /* round to 1000Hz */ |
694 | calc_val /= 1000; /* truncate to kHz */ |
695 | |
696 | return calc_val; |
697 | } |
698 | EXPORT_SYMBOL(drm_mode_hsync); |
699 | |
700 | /** |
701 | * drm_mode_vrefresh - get the vrefresh of a mode |
702 | * @mode: mode |
703 | * |
704 | * Returns: |
705 | * @modes's vrefresh rate in Hz, rounded to the nearest integer. Calculates the |
706 | * value first if it is not yet set. |
707 | */ |
708 | int drm_mode_vrefresh(const struct drm_display_mode *mode) |
709 | { |
710 | int refresh = 0; |
711 | unsigned int calc_val; |
712 | |
713 | if (mode->vrefresh > 0) |
714 | refresh = mode->vrefresh; |
715 | else if (mode->htotal > 0 && mode->vtotal > 0) { |
716 | int vtotal; |
717 | vtotal = mode->vtotal; |
718 | /* work out vrefresh the value will be x1000 */ |
719 | calc_val = (mode->clock * 1000); |
720 | calc_val /= mode->htotal; |
721 | refresh = (calc_val + vtotal / 2) / vtotal; |
722 | |
723 | if (mode->flags & DRM_MODE_FLAG_INTERLACE) |
724 | refresh *= 2; |
725 | if (mode->flags & DRM_MODE_FLAG_DBLSCAN) |
726 | refresh /= 2; |
727 | if (mode->vscan > 1) |
728 | refresh /= mode->vscan; |
729 | } |
730 | return refresh; |
731 | } |
732 | EXPORT_SYMBOL(drm_mode_vrefresh); |
733 | |
734 | /** |
735 | * drm_mode_set_crtcinfo - set CRTC modesetting timing parameters |
736 | * @p: mode |
737 | * @adjust_flags: a combination of adjustment flags |
738 | * |
739 | * Setup the CRTC modesetting timing parameters for @p, adjusting if necessary. |
740 | * |
741 | * - The CRTC_INTERLACE_HALVE_V flag can be used to halve vertical timings of |
742 | * interlaced modes. |
743 | * - The CRTC_STEREO_DOUBLE flag can be used to compute the timings for |
744 | * buffers containing two eyes (only adjust the timings when needed, eg. for |
745 | * "frame packing" or "side by side full"). |
746 | */ |
747 | void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags) |
748 | { |
749 | if ((p == NULL) || ((p->type & DRM_MODE_TYPE_CRTC_C) == DRM_MODE_TYPE_BUILTIN)) |
750 | return; |
751 | |
752 | p->crtc_clock = p->clock; |
753 | p->crtc_hdisplay = p->hdisplay; |
754 | p->crtc_hsync_start = p->hsync_start; |
755 | p->crtc_hsync_end = p->hsync_end; |
756 | p->crtc_htotal = p->htotal; |
757 | p->crtc_hskew = p->hskew; |
758 | p->crtc_vdisplay = p->vdisplay; |
759 | p->crtc_vsync_start = p->vsync_start; |
760 | p->crtc_vsync_end = p->vsync_end; |
761 | p->crtc_vtotal = p->vtotal; |
762 | |
763 | if (p->flags & DRM_MODE_FLAG_INTERLACE) { |
764 | if (adjust_flags & CRTC_INTERLACE_HALVE_V) { |
765 | p->crtc_vdisplay /= 2; |
766 | p->crtc_vsync_start /= 2; |
767 | p->crtc_vsync_end /= 2; |
768 | p->crtc_vtotal /= 2; |
769 | } |
770 | } |
771 | |
772 | if (p->flags & DRM_MODE_FLAG_DBLSCAN) { |
773 | p->crtc_vdisplay *= 2; |
774 | p->crtc_vsync_start *= 2; |
775 | p->crtc_vsync_end *= 2; |
776 | p->crtc_vtotal *= 2; |
777 | } |
778 | |
779 | if (p->vscan > 1) { |
780 | p->crtc_vdisplay *= p->vscan; |
781 | p->crtc_vsync_start *= p->vscan; |
782 | p->crtc_vsync_end *= p->vscan; |
783 | p->crtc_vtotal *= p->vscan; |
784 | } |
785 | |
786 | if (adjust_flags & CRTC_STEREO_DOUBLE) { |
787 | unsigned int layout = p->flags & DRM_MODE_FLAG_3D_MASK; |
788 | |
789 | switch (layout) { |
790 | case DRM_MODE_FLAG_3D_FRAME_PACKING: |
791 | p->crtc_clock *= 2; |
792 | p->crtc_vdisplay += p->crtc_vtotal; |
793 | p->crtc_vsync_start += p->crtc_vtotal; |
794 | p->crtc_vsync_end += p->crtc_vtotal; |
795 | p->crtc_vtotal += p->crtc_vtotal; |
796 | break; |
797 | } |
798 | } |
799 | |
800 | p->crtc_vblank_start = min(p->crtc_vsync_start, p->crtc_vdisplay); |
801 | p->crtc_vblank_end = max(p->crtc_vsync_end, p->crtc_vtotal); |
802 | p->crtc_hblank_start = min(p->crtc_hsync_start, p->crtc_hdisplay); |
803 | p->crtc_hblank_end = max(p->crtc_hsync_end, p->crtc_htotal); |
804 | } |
805 | EXPORT_SYMBOL(drm_mode_set_crtcinfo); |
806 | |
807 | /** |
808 | * drm_mode_copy - copy the mode |
809 | * @dst: mode to overwrite |
810 | * @src: mode to copy |
811 | * |
812 | * Copy an existing mode into another mode, preserving the object id and |
813 | * list head of the destination mode. |
814 | */ |
815 | void drm_mode_copy(struct drm_display_mode *dst, const struct drm_display_mode *src) |
816 | { |
817 | int id = dst->base.id; |
818 | struct list_head head = dst->head; |
819 | |
820 | *dst = *src; |
821 | dst->base.id = id; |
822 | dst->head = head; |
823 | } |
824 | EXPORT_SYMBOL(drm_mode_copy); |
825 | |
826 | /** |
827 | * drm_mode_duplicate - allocate and duplicate an existing mode |
828 | * @dev: drm_device to allocate the duplicated mode for |
829 | * @mode: mode to duplicate |
830 | * |
831 | * Just allocate a new mode, copy the existing mode into it, and return |
832 | * a pointer to it. Used to create new instances of established modes. |
833 | * |
834 | * Returns: |
835 | * Pointer to duplicated mode on success, NULL on error. |
836 | */ |
837 | struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev, |
838 | const struct drm_display_mode *mode) |
839 | { |
840 | struct drm_display_mode *nmode; |
841 | |
842 | nmode = drm_mode_create(dev); |
843 | if (!nmode) |
844 | return NULL; |
845 | |
846 | drm_mode_copy(nmode, mode); |
847 | |
848 | return nmode; |
849 | } |
850 | EXPORT_SYMBOL(drm_mode_duplicate); |
851 | |
852 | /** |
853 | * drm_mode_equal - test modes for equality |
854 | * @mode1: first mode |
855 | * @mode2: second mode |
856 | * |
857 | * Check to see if @mode1 and @mode2 are equivalent. |
858 | * |
859 | * Returns: |
860 | * True if the modes are equal, false otherwise. |
861 | */ |
862 | bool drm_mode_equal(const struct drm_display_mode *mode1, const struct drm_display_mode *mode2) |
863 | { |
864 | /* do clock check convert to PICOS so fb modes get matched |
865 | * the same */ |
866 | if (mode1->clock && mode2->clock) { |
867 | if (KHZ2PICOS(mode1->clock) != KHZ2PICOS(mode2->clock)) |
868 | return false; |
869 | } else if (mode1->clock != mode2->clock) |
870 | return false; |
871 | |
872 | if ((mode1->flags & DRM_MODE_FLAG_3D_MASK) != |
873 | (mode2->flags & DRM_MODE_FLAG_3D_MASK)) |
874 | return false; |
875 | |
876 | return drm_mode_equal_no_clocks_no_stereo(mode1, mode2); |
877 | } |
878 | EXPORT_SYMBOL(drm_mode_equal); |
879 | |
880 | /** |
881 | * drm_mode_equal_no_clocks_no_stereo - test modes for equality |
882 | * @mode1: first mode |
883 | * @mode2: second mode |
884 | * |
885 | * Check to see if @mode1 and @mode2 are equivalent, but |
886 | * don't check the pixel clocks nor the stereo layout. |
887 | * |
888 | * Returns: |
889 | * True if the modes are equal, false otherwise. |
890 | */ |
891 | bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1, |
892 | const struct drm_display_mode *mode2) |
893 | { |
894 | if (mode1->hdisplay == mode2->hdisplay && |
895 | mode1->hsync_start == mode2->hsync_start && |
896 | mode1->hsync_end == mode2->hsync_end && |
897 | mode1->htotal == mode2->htotal && |
898 | mode1->hskew == mode2->hskew && |
899 | mode1->vdisplay == mode2->vdisplay && |
900 | mode1->vsync_start == mode2->vsync_start && |
901 | mode1->vsync_end == mode2->vsync_end && |
902 | mode1->vtotal == mode2->vtotal && |
903 | mode1->vscan == mode2->vscan && |
904 | (mode1->flags & ~DRM_MODE_FLAG_3D_MASK) == |
905 | (mode2->flags & ~DRM_MODE_FLAG_3D_MASK)) |
906 | return true; |
907 | |
908 | return false; |
909 | } |
910 | EXPORT_SYMBOL(drm_mode_equal_no_clocks_no_stereo); |
911 | |
912 | /** |
913 | * drm_mode_validate_size - make sure modes adhere to size constraints |
914 | * @dev: DRM device |
915 | * @mode_list: list of modes to check |
916 | * @maxX: maximum width |
917 | * @maxY: maximum height |
918 | * |
919 | * This function is a helper which can be used to validate modes against size |
920 | * limitations of the DRM device/connector. If a mode is too big its status |
921 | * memeber is updated with the appropriate validation failure code. The list |
922 | * itself is not changed. |
923 | */ |
924 | void drm_mode_validate_size(struct drm_device *dev, |
925 | struct list_head *mode_list, |
926 | int maxX, int maxY) |
927 | { |
928 | struct drm_display_mode *mode; |
929 | |
930 | list_for_each_entry(mode, mode_list, head) { |
931 | if (maxX > 0 && mode->hdisplay > maxX) |
932 | mode->status = MODE_VIRTUAL_X; |
933 | |
934 | if (maxY > 0 && mode->vdisplay > maxY) |
935 | mode->status = MODE_VIRTUAL_Y; |
936 | } |
937 | } |
938 | EXPORT_SYMBOL(drm_mode_validate_size); |
939 | |
940 | /** |
941 | * drm_mode_prune_invalid - remove invalid modes from mode list |
942 | * @dev: DRM device |
943 | * @mode_list: list of modes to check |
944 | * @verbose: be verbose about it |
945 | * |
946 | * This helper function can be used to prune a display mode list after |
947 | * validation has been completed. All modes who's status is not MODE_OK will be |
948 | * removed from the list, and if @verbose the status code and mode name is also |
949 | * printed to dmesg. |
950 | */ |
951 | void drm_mode_prune_invalid(struct drm_device *dev, |
952 | struct list_head *mode_list, bool verbose) |
953 | { |
954 | struct drm_display_mode *mode, *t; |
955 | |
956 | list_for_each_entry_safe(mode, t, mode_list, head) { |
957 | if (mode->status != MODE_OK) { |
958 | list_del(&mode->head); |
959 | if (verbose) { |
960 | drm_mode_debug_printmodeline(mode); |
961 | DRM_DEBUG_KMS("Not using %s mode %d\n" , |
962 | mode->name, mode->status); |
963 | } |
964 | drm_mode_destroy(dev, mode); |
965 | } |
966 | } |
967 | } |
968 | EXPORT_SYMBOL(drm_mode_prune_invalid); |
969 | |
970 | /** |
971 | * drm_mode_compare - compare modes for favorability |
972 | * @priv: unused |
973 | * @lh_a: list_head for first mode |
974 | * @lh_b: list_head for second mode |
975 | * |
976 | * Compare two modes, given by @lh_a and @lh_b, returning a value indicating |
977 | * which is better. |
978 | * |
979 | * Returns: |
980 | * Negative if @lh_a is better than @lh_b, zero if they're equivalent, or |
981 | * positive if @lh_b is better than @lh_a. |
982 | */ |
983 | static int drm_mode_compare(void *priv, struct list_head *lh_a, struct list_head *lh_b) |
984 | { |
985 | struct drm_display_mode *a = list_entry(lh_a, struct drm_display_mode, head); |
986 | struct drm_display_mode *b = list_entry(lh_b, struct drm_display_mode, head); |
987 | int diff; |
988 | |
989 | diff = ((b->type & DRM_MODE_TYPE_PREFERRED) != 0) - |
990 | ((a->type & DRM_MODE_TYPE_PREFERRED) != 0); |
991 | if (diff) |
992 | return diff; |
993 | diff = b->hdisplay * b->vdisplay - a->hdisplay * a->vdisplay; |
994 | if (diff) |
995 | return diff; |
996 | |
997 | diff = b->vrefresh - a->vrefresh; |
998 | if (diff) |
999 | return diff; |
1000 | |
1001 | diff = b->clock - a->clock; |
1002 | return diff; |
1003 | } |
1004 | |
1005 | /** |
1006 | * drm_mode_sort - sort mode list |
1007 | * @mode_list: list of drm_display_mode structures to sort |
1008 | * |
1009 | * Sort @mode_list by favorability, moving good modes to the head of the list. |
1010 | */ |
1011 | void drm_mode_sort(struct list_head *mode_list) |
1012 | { |
1013 | list_sort(NULL, mode_list, drm_mode_compare); |
1014 | } |
1015 | EXPORT_SYMBOL(drm_mode_sort); |
1016 | |
1017 | /** |
1018 | * drm_mode_connector_list_update - update the mode list for the connector |
1019 | * @connector: the connector to update |
1020 | * |
1021 | * This moves the modes from the @connector probed_modes list |
1022 | * to the actual mode list. It compares the probed mode against the current |
1023 | * list and only adds different/new modes. |
1024 | * |
1025 | * This is just a helper functions doesn't validate any modes itself and also |
1026 | * doesn't prune any invalid modes. Callers need to do that themselves. |
1027 | */ |
1028 | void drm_mode_connector_list_update(struct drm_connector *connector) |
1029 | { |
1030 | struct drm_display_mode *mode; |
1031 | struct drm_display_mode *pmode, *pt; |
1032 | int found_it; |
1033 | |
1034 | WARN_ON(!mutex_is_locked(&connector->dev->mode_config.mutex)); |
1035 | |
1036 | list_for_each_entry_safe(pmode, pt, &connector->probed_modes, |
1037 | head) { |
1038 | found_it = 0; |
1039 | /* go through current modes checking for the new probed mode */ |
1040 | list_for_each_entry(mode, &connector->modes, head) { |
1041 | if (drm_mode_equal(pmode, mode)) { |
1042 | found_it = 1; |
1043 | /* if equal delete the probed mode */ |
1044 | mode->status = pmode->status; |
1045 | /* Merge type bits together */ |
1046 | mode->type |= pmode->type; |
1047 | list_del(&pmode->head); |
1048 | drm_mode_destroy(connector->dev, pmode); |
1049 | break; |
1050 | } |
1051 | } |
1052 | |
1053 | if (!found_it) { |
1054 | list_move_tail(&pmode->head, &connector->modes); |
1055 | } |
1056 | } |
1057 | } |
1058 | EXPORT_SYMBOL(drm_mode_connector_list_update); |
1059 | |
1060 | /** |
1061 | * drm_mode_parse_command_line_for_connector - parse command line modeline for connector |
1062 | * @mode_option: optional per connector mode option |
1063 | * @connector: connector to parse modeline for |
1064 | * @mode: preallocated drm_cmdline_mode structure to fill out |
1065 | * |
1066 | * This parses @mode_option command line modeline for modes and options to |
1067 | * configure the connector. If @mode_option is NULL the default command line |
1068 | * modeline in fb_mode_option will be parsed instead. |
1069 | * |
1070 | * This uses the same parameters as the fb modedb.c, except for an extra |
1071 | * force-enable, force-enable-digital and force-disable bit at the end: |
1072 | * |
1073 | * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd] |
1074 | * |
1075 | * The intermediate drm_cmdline_mode structure is required to store additional |
1076 | * options from the command line modline like the force-enabel/disable flag. |
1077 | * |
1078 | * Returns: |
1079 | * True if a valid modeline has been parsed, false otherwise. |
1080 | */ |
1081 | bool drm_mode_parse_command_line_for_connector(const char *mode_option, |
1082 | struct drm_connector *connector, |
1083 | struct drm_cmdline_mode *mode) |
1084 | { |
1085 | const char *name; |
1086 | unsigned int namelen; |
1087 | bool res_specified = false, bpp_specified = false, refresh_specified = false; |
1088 | long xres = 0, yres = 0, bpp = 32, refresh = 0; |
1089 | bool yres_specified = false, cvt = false, rb = false; |
1090 | bool interlace = false, margins = false, was_digit = false; |
1091 | int i; |
1092 | enum drm_connector_force force = DRM_FORCE_UNSPECIFIED; |
1093 | |
1094 | #if !defined(__NetBSD__) |
1095 | #ifdef CONFIG_FB |
1096 | if (!mode_option) |
1097 | mode_option = fb_mode_option; |
1098 | #endif |
1099 | #endif |
1100 | |
1101 | if (!mode_option) { |
1102 | mode->specified = false; |
1103 | return false; |
1104 | } |
1105 | |
1106 | name = mode_option; |
1107 | namelen = strlen(name); |
1108 | for (i = namelen-1; i >= 0; i--) { |
1109 | switch (name[i]) { |
1110 | case '@': |
1111 | if (!refresh_specified && !bpp_specified && |
1112 | !yres_specified && !cvt && !rb && was_digit) { |
1113 | if (kstrtol(&name[i+1], 10, &refresh) == 0) { |
1114 | refresh_specified = true; |
1115 | was_digit = false; |
1116 | } else { |
1117 | goto done; |
1118 | } |
1119 | } else |
1120 | goto done; |
1121 | break; |
1122 | case '-': |
1123 | if (!bpp_specified && !yres_specified && !cvt && |
1124 | !rb && was_digit) { |
1125 | if (kstrtol(&name[i+1], 10, &bpp) == 0) { |
1126 | bpp_specified = true; |
1127 | was_digit = false; |
1128 | } else { |
1129 | goto done; |
1130 | } |
1131 | } else |
1132 | goto done; |
1133 | break; |
1134 | case 'x': |
1135 | if (!yres_specified && was_digit) { |
1136 | if (kstrtol(&name[i+1], 10, &yres) == 0) { |
1137 | yres_specified = true; |
1138 | was_digit = false; |
1139 | } else { |
1140 | goto done; |
1141 | } |
1142 | } else |
1143 | goto done; |
1144 | break; |
1145 | case '0' ... '9': |
1146 | was_digit = true; |
1147 | break; |
1148 | case 'M': |
1149 | if (yres_specified || cvt || was_digit) |
1150 | goto done; |
1151 | cvt = true; |
1152 | break; |
1153 | case 'R': |
1154 | if (yres_specified || cvt || rb || was_digit) |
1155 | goto done; |
1156 | rb = true; |
1157 | break; |
1158 | case 'm': |
1159 | if (cvt || yres_specified || was_digit) |
1160 | goto done; |
1161 | margins = true; |
1162 | break; |
1163 | case 'i': |
1164 | if (cvt || yres_specified || was_digit) |
1165 | goto done; |
1166 | interlace = true; |
1167 | break; |
1168 | case 'e': |
1169 | if (yres_specified || bpp_specified || refresh_specified || |
1170 | was_digit || (force != DRM_FORCE_UNSPECIFIED)) |
1171 | goto done; |
1172 | |
1173 | force = DRM_FORCE_ON; |
1174 | break; |
1175 | case 'D': |
1176 | if (yres_specified || bpp_specified || refresh_specified || |
1177 | was_digit || (force != DRM_FORCE_UNSPECIFIED)) |
1178 | goto done; |
1179 | |
1180 | if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) && |
1181 | (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB)) |
1182 | force = DRM_FORCE_ON; |
1183 | else |
1184 | force = DRM_FORCE_ON_DIGITAL; |
1185 | break; |
1186 | case 'd': |
1187 | if (yres_specified || bpp_specified || refresh_specified || |
1188 | was_digit || (force != DRM_FORCE_UNSPECIFIED)) |
1189 | goto done; |
1190 | |
1191 | force = DRM_FORCE_OFF; |
1192 | break; |
1193 | default: |
1194 | goto done; |
1195 | } |
1196 | } |
1197 | |
1198 | if (i < 0 && yres_specified) { |
1199 | char *ch = NULL; |
1200 | xres = strtoll(name, &ch, 10); |
1201 | if ((ch != NULL) && (*ch == 'x')) |
1202 | res_specified = true; |
1203 | else |
1204 | i = ch - name; |
1205 | } else if (!yres_specified && was_digit) { |
1206 | /* catch mode that begins with digits but has no 'x' */ |
1207 | i = 0; |
1208 | } |
1209 | done: |
1210 | if (i >= 0) { |
1211 | DRM_ERROR( |
1212 | "parse error at position %i in video mode '%s'\n" , |
1213 | i, name); |
1214 | mode->specified = false; |
1215 | return false; |
1216 | } |
1217 | |
1218 | if (res_specified) { |
1219 | mode->specified = true; |
1220 | mode->xres = xres; |
1221 | mode->yres = yres; |
1222 | } |
1223 | |
1224 | if (refresh_specified) { |
1225 | mode->refresh_specified = true; |
1226 | mode->refresh = refresh; |
1227 | } |
1228 | |
1229 | if (bpp_specified) { |
1230 | mode->bpp_specified = true; |
1231 | mode->bpp = bpp; |
1232 | } |
1233 | mode->rb = rb; |
1234 | mode->cvt = cvt; |
1235 | mode->interlace = interlace; |
1236 | mode->margins = margins; |
1237 | mode->force = force; |
1238 | |
1239 | return true; |
1240 | } |
1241 | EXPORT_SYMBOL(drm_mode_parse_command_line_for_connector); |
1242 | |
1243 | /** |
1244 | * drm_mode_create_from_cmdline_mode - convert a command line modeline into a DRM display mode |
1245 | * @dev: DRM device to create the new mode for |
1246 | * @cmd: input command line modeline |
1247 | * |
1248 | * Returns: |
1249 | * Pointer to converted mode on success, NULL on error. |
1250 | */ |
1251 | struct drm_display_mode * |
1252 | drm_mode_create_from_cmdline_mode(struct drm_device *dev, |
1253 | struct drm_cmdline_mode *cmd) |
1254 | { |
1255 | struct drm_display_mode *mode; |
1256 | |
1257 | if (cmd->cvt) |
1258 | mode = drm_cvt_mode(dev, |
1259 | cmd->xres, cmd->yres, |
1260 | cmd->refresh_specified ? cmd->refresh : 60, |
1261 | cmd->rb, cmd->interlace, |
1262 | cmd->margins); |
1263 | else |
1264 | mode = drm_gtf_mode(dev, |
1265 | cmd->xres, cmd->yres, |
1266 | cmd->refresh_specified ? cmd->refresh : 60, |
1267 | cmd->interlace, |
1268 | cmd->margins); |
1269 | if (!mode) |
1270 | return NULL; |
1271 | |
1272 | drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); |
1273 | return mode; |
1274 | } |
1275 | EXPORT_SYMBOL(drm_mode_create_from_cmdline_mode); |
1276 | |