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f453ba04 DA |
1 | /* |
2 | * The list_sort function is (presumably) licensed under the GPL (see the | |
3 | * top level "COPYING" file for details). | |
4 | * | |
5 | * The remainder of this file is: | |
6 | * | |
7 | * Copyright © 1997-2003 by The XFree86 Project, Inc. | |
8 | * Copyright © 2007 Dave Airlie | |
9 | * Copyright © 2007-2008 Intel Corporation | |
10 | * Jesse Barnes <jesse.barnes@intel.com> | |
d782c3f9 | 11 | * Copyright 2005-2006 Luc Verhaegen |
26bbdada | 12 | * Copyright (c) 2001, Andy Ritger aritger@nvidia.com |
f453ba04 DA |
13 | * |
14 | * Permission is hereby granted, free of charge, to any person obtaining a | |
15 | * copy of this software and associated documentation files (the "Software"), | |
16 | * to deal in the Software without restriction, including without limitation | |
17 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
18 | * and/or sell copies of the Software, and to permit persons to whom the | |
19 | * Software is furnished to do so, subject to the following conditions: | |
20 | * | |
21 | * The above copyright notice and this permission notice shall be included in | |
22 | * all copies or substantial portions of the Software. | |
23 | * | |
24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
25 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
26 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
27 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
28 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
29 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
30 | * OTHER DEALINGS IN THE SOFTWARE. | |
31 | * | |
32 | * Except as contained in this notice, the name of the copyright holder(s) | |
33 | * and author(s) shall not be used in advertising or otherwise to promote | |
34 | * the sale, use or other dealings in this Software without prior written | |
35 | * authorization from the copyright holder(s) and author(s). | |
36 | */ | |
37 | ||
38 | #include <linux/list.h> | |
39 | #include "drmP.h" | |
40 | #include "drm.h" | |
41 | #include "drm_crtc.h" | |
42 | ||
43 | /** | |
44 | * drm_mode_debug_printmodeline - debug print a mode | |
45 | * @dev: DRM device | |
46 | * @mode: mode to print | |
47 | * | |
48 | * LOCKING: | |
49 | * None. | |
50 | * | |
51 | * Describe @mode using DRM_DEBUG. | |
52 | */ | |
53 | void drm_mode_debug_printmodeline(struct drm_display_mode *mode) | |
54 | { | |
f940f37f | 55 | DRM_DEBUG_KMS("Modeline %d:\"%s\" %d %d %d %d %d %d %d %d %d %d " |
8a4c47f3 | 56 | "0x%x 0x%x\n", |
f0531859 | 57 | mode->base.id, mode->name, mode->vrefresh, mode->clock, |
58 | mode->hdisplay, mode->hsync_start, | |
59 | mode->hsync_end, mode->htotal, | |
60 | mode->vdisplay, mode->vsync_start, | |
61 | mode->vsync_end, mode->vtotal, mode->type, mode->flags); | |
f453ba04 DA |
62 | } |
63 | EXPORT_SYMBOL(drm_mode_debug_printmodeline); | |
64 | ||
d782c3f9 ZY |
65 | /** |
66 | * drm_cvt_mode -create a modeline based on CVT algorithm | |
67 | * @dev: DRM device | |
68 | * @hdisplay: hdisplay size | |
69 | * @vdisplay: vdisplay size | |
70 | * @vrefresh : vrefresh rate | |
71 | * @reduced : Whether the GTF calculation is simplified | |
72 | * @interlaced:Whether the interlace is supported | |
73 | * | |
74 | * LOCKING: | |
75 | * none. | |
76 | * | |
77 | * return the modeline based on CVT algorithm | |
78 | * | |
79 | * This function is called to generate the modeline based on CVT algorithm | |
80 | * according to the hdisplay, vdisplay, vrefresh. | |
81 | * It is based from the VESA(TM) Coordinated Video Timing Generator by | |
82 | * Graham Loveridge April 9, 2003 available at | |
83 | * http://www.vesa.org/public/CVT/CVTd6r1.xls | |
84 | * | |
85 | * And it is copied from xf86CVTmode in xserver/hw/xfree86/modes/xf86cvt.c. | |
86 | * What I have done is to translate it by using integer calculation. | |
87 | */ | |
88 | #define HV_FACTOR 1000 | |
89 | struct drm_display_mode *drm_cvt_mode(struct drm_device *dev, int hdisplay, | |
90 | int vdisplay, int vrefresh, | |
d50ba256 | 91 | bool reduced, bool interlaced, bool margins) |
d782c3f9 ZY |
92 | { |
93 | /* 1) top/bottom margin size (% of height) - default: 1.8, */ | |
94 | #define CVT_MARGIN_PERCENTAGE 18 | |
95 | /* 2) character cell horizontal granularity (pixels) - default 8 */ | |
96 | #define CVT_H_GRANULARITY 8 | |
97 | /* 3) Minimum vertical porch (lines) - default 3 */ | |
98 | #define CVT_MIN_V_PORCH 3 | |
99 | /* 4) Minimum number of vertical back porch lines - default 6 */ | |
100 | #define CVT_MIN_V_BPORCH 6 | |
101 | /* Pixel Clock step (kHz) */ | |
102 | #define CVT_CLOCK_STEP 250 | |
103 | struct drm_display_mode *drm_mode; | |
d782c3f9 ZY |
104 | unsigned int vfieldrate, hperiod; |
105 | int hdisplay_rnd, hmargin, vdisplay_rnd, vmargin, vsync; | |
106 | int interlace; | |
107 | ||
108 | /* allocate the drm_display_mode structure. If failure, we will | |
109 | * return directly | |
110 | */ | |
111 | drm_mode = drm_mode_create(dev); | |
112 | if (!drm_mode) | |
113 | return NULL; | |
114 | ||
115 | /* the CVT default refresh rate is 60Hz */ | |
116 | if (!vrefresh) | |
117 | vrefresh = 60; | |
118 | ||
119 | /* the required field fresh rate */ | |
120 | if (interlaced) | |
121 | vfieldrate = vrefresh * 2; | |
122 | else | |
123 | vfieldrate = vrefresh; | |
124 | ||
125 | /* horizontal pixels */ | |
126 | hdisplay_rnd = hdisplay - (hdisplay % CVT_H_GRANULARITY); | |
127 | ||
128 | /* determine the left&right borders */ | |
129 | hmargin = 0; | |
130 | if (margins) { | |
131 | hmargin = hdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000; | |
132 | hmargin -= hmargin % CVT_H_GRANULARITY; | |
133 | } | |
134 | /* find the total active pixels */ | |
135 | drm_mode->hdisplay = hdisplay_rnd + 2 * hmargin; | |
136 | ||
137 | /* find the number of lines per field */ | |
138 | if (interlaced) | |
139 | vdisplay_rnd = vdisplay / 2; | |
140 | else | |
141 | vdisplay_rnd = vdisplay; | |
142 | ||
143 | /* find the top & bottom borders */ | |
144 | vmargin = 0; | |
145 | if (margins) | |
146 | vmargin = vdisplay_rnd * CVT_MARGIN_PERCENTAGE / 1000; | |
147 | ||
841b4117 | 148 | drm_mode->vdisplay = vdisplay + 2 * vmargin; |
d782c3f9 ZY |
149 | |
150 | /* Interlaced */ | |
151 | if (interlaced) | |
152 | interlace = 1; | |
153 | else | |
154 | interlace = 0; | |
155 | ||
156 | /* Determine VSync Width from aspect ratio */ | |
157 | if (!(vdisplay % 3) && ((vdisplay * 4 / 3) == hdisplay)) | |
158 | vsync = 4; | |
159 | else if (!(vdisplay % 9) && ((vdisplay * 16 / 9) == hdisplay)) | |
160 | vsync = 5; | |
161 | else if (!(vdisplay % 10) && ((vdisplay * 16 / 10) == hdisplay)) | |
162 | vsync = 6; | |
163 | else if (!(vdisplay % 4) && ((vdisplay * 5 / 4) == hdisplay)) | |
164 | vsync = 7; | |
165 | else if (!(vdisplay % 9) && ((vdisplay * 15 / 9) == hdisplay)) | |
166 | vsync = 7; | |
167 | else /* custom */ | |
168 | vsync = 10; | |
169 | ||
170 | if (!reduced) { | |
171 | /* simplify the GTF calculation */ | |
172 | /* 4) Minimum time of vertical sync + back porch interval (µs) | |
173 | * default 550.0 | |
174 | */ | |
175 | int tmp1, tmp2; | |
176 | #define CVT_MIN_VSYNC_BP 550 | |
177 | /* 3) Nominal HSync width (% of line period) - default 8 */ | |
178 | #define CVT_HSYNC_PERCENTAGE 8 | |
179 | unsigned int hblank_percentage; | |
180 | int vsyncandback_porch, vback_porch, hblank; | |
181 | ||
182 | /* estimated the horizontal period */ | |
183 | tmp1 = HV_FACTOR * 1000000 - | |
184 | CVT_MIN_VSYNC_BP * HV_FACTOR * vfieldrate; | |
185 | tmp2 = (vdisplay_rnd + 2 * vmargin + CVT_MIN_V_PORCH) * 2 + | |
186 | interlace; | |
187 | hperiod = tmp1 * 2 / (tmp2 * vfieldrate); | |
188 | ||
189 | tmp1 = CVT_MIN_VSYNC_BP * HV_FACTOR / hperiod + 1; | |
190 | /* 9. Find number of lines in sync + backporch */ | |
191 | if (tmp1 < (vsync + CVT_MIN_V_PORCH)) | |
192 | vsyncandback_porch = vsync + CVT_MIN_V_PORCH; | |
193 | else | |
194 | vsyncandback_porch = tmp1; | |
195 | /* 10. Find number of lines in back porch */ | |
196 | vback_porch = vsyncandback_porch - vsync; | |
197 | drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + | |
198 | vsyncandback_porch + CVT_MIN_V_PORCH; | |
199 | /* 5) Definition of Horizontal blanking time limitation */ | |
200 | /* Gradient (%/kHz) - default 600 */ | |
201 | #define CVT_M_FACTOR 600 | |
202 | /* Offset (%) - default 40 */ | |
203 | #define CVT_C_FACTOR 40 | |
204 | /* Blanking time scaling factor - default 128 */ | |
205 | #define CVT_K_FACTOR 128 | |
206 | /* Scaling factor weighting - default 20 */ | |
207 | #define CVT_J_FACTOR 20 | |
208 | #define CVT_M_PRIME (CVT_M_FACTOR * CVT_K_FACTOR / 256) | |
209 | #define CVT_C_PRIME ((CVT_C_FACTOR - CVT_J_FACTOR) * CVT_K_FACTOR / 256 + \ | |
210 | CVT_J_FACTOR) | |
211 | /* 12. Find ideal blanking duty cycle from formula */ | |
212 | hblank_percentage = CVT_C_PRIME * HV_FACTOR - CVT_M_PRIME * | |
213 | hperiod / 1000; | |
214 | /* 13. Blanking time */ | |
215 | if (hblank_percentage < 20 * HV_FACTOR) | |
216 | hblank_percentage = 20 * HV_FACTOR; | |
217 | hblank = drm_mode->hdisplay * hblank_percentage / | |
218 | (100 * HV_FACTOR - hblank_percentage); | |
219 | hblank -= hblank % (2 * CVT_H_GRANULARITY); | |
220 | /* 14. find the total pixes per line */ | |
221 | drm_mode->htotal = drm_mode->hdisplay + hblank; | |
222 | drm_mode->hsync_end = drm_mode->hdisplay + hblank / 2; | |
223 | drm_mode->hsync_start = drm_mode->hsync_end - | |
224 | (drm_mode->htotal * CVT_HSYNC_PERCENTAGE) / 100; | |
225 | drm_mode->hsync_start += CVT_H_GRANULARITY - | |
226 | drm_mode->hsync_start % CVT_H_GRANULARITY; | |
227 | /* fill the Vsync values */ | |
228 | drm_mode->vsync_start = drm_mode->vdisplay + CVT_MIN_V_PORCH; | |
229 | drm_mode->vsync_end = drm_mode->vsync_start + vsync; | |
230 | } else { | |
231 | /* Reduced blanking */ | |
232 | /* Minimum vertical blanking interval time (µs)- default 460 */ | |
233 | #define CVT_RB_MIN_VBLANK 460 | |
234 | /* Fixed number of clocks for horizontal sync */ | |
235 | #define CVT_RB_H_SYNC 32 | |
236 | /* Fixed number of clocks for horizontal blanking */ | |
237 | #define CVT_RB_H_BLANK 160 | |
238 | /* Fixed number of lines for vertical front porch - default 3*/ | |
239 | #define CVT_RB_VFPORCH 3 | |
240 | int vbilines; | |
241 | int tmp1, tmp2; | |
242 | /* 8. Estimate Horizontal period. */ | |
243 | tmp1 = HV_FACTOR * 1000000 - | |
244 | CVT_RB_MIN_VBLANK * HV_FACTOR * vfieldrate; | |
245 | tmp2 = vdisplay_rnd + 2 * vmargin; | |
246 | hperiod = tmp1 / (tmp2 * vfieldrate); | |
247 | /* 9. Find number of lines in vertical blanking */ | |
248 | vbilines = CVT_RB_MIN_VBLANK * HV_FACTOR / hperiod + 1; | |
249 | /* 10. Check if vertical blanking is sufficient */ | |
250 | if (vbilines < (CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH)) | |
251 | vbilines = CVT_RB_VFPORCH + vsync + CVT_MIN_V_BPORCH; | |
252 | /* 11. Find total number of lines in vertical field */ | |
253 | drm_mode->vtotal = vdisplay_rnd + 2 * vmargin + vbilines; | |
254 | /* 12. Find total number of pixels in a line */ | |
255 | drm_mode->htotal = drm_mode->hdisplay + CVT_RB_H_BLANK; | |
256 | /* Fill in HSync values */ | |
257 | drm_mode->hsync_end = drm_mode->hdisplay + CVT_RB_H_BLANK / 2; | |
258 | drm_mode->hsync_start = drm_mode->hsync_end = CVT_RB_H_SYNC; | |
259 | } | |
260 | /* 15/13. Find pixel clock frequency (kHz for xf86) */ | |
261 | drm_mode->clock = drm_mode->htotal * HV_FACTOR * 1000 / hperiod; | |
262 | drm_mode->clock -= drm_mode->clock % CVT_CLOCK_STEP; | |
263 | /* 18/16. Find actual vertical frame frequency */ | |
264 | /* ignore - just set the mode flag for interlaced */ | |
265 | if (interlaced) | |
266 | drm_mode->vtotal *= 2; | |
267 | /* Fill the mode line name */ | |
268 | drm_mode_set_name(drm_mode); | |
269 | if (reduced) | |
270 | drm_mode->flags |= (DRM_MODE_FLAG_PHSYNC | | |
271 | DRM_MODE_FLAG_NVSYNC); | |
272 | else | |
273 | drm_mode->flags |= (DRM_MODE_FLAG_PVSYNC | | |
274 | DRM_MODE_FLAG_NHSYNC); | |
275 | if (interlaced) | |
276 | drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; | |
277 | ||
278 | return drm_mode; | |
279 | } | |
280 | EXPORT_SYMBOL(drm_cvt_mode); | |
281 | ||
26bbdada ZY |
282 | /** |
283 | * drm_gtf_mode - create the modeline based on GTF algorithm | |
284 | * | |
285 | * @dev :drm device | |
286 | * @hdisplay :hdisplay size | |
287 | * @vdisplay :vdisplay size | |
288 | * @vrefresh :vrefresh rate. | |
289 | * @interlaced :whether the interlace is supported | |
290 | * @margins :whether the margin is supported | |
291 | * | |
292 | * LOCKING. | |
293 | * none. | |
294 | * | |
295 | * return the modeline based on GTF algorithm | |
296 | * | |
297 | * This function is to create the modeline based on the GTF algorithm. | |
298 | * Generalized Timing Formula is derived from: | |
299 | * GTF Spreadsheet by Andy Morrish (1/5/97) | |
300 | * available at http://www.vesa.org | |
301 | * | |
302 | * And it is copied from the file of xserver/hw/xfree86/modes/xf86gtf.c. | |
303 | * What I have done is to translate it by using integer calculation. | |
304 | * I also refer to the function of fb_get_mode in the file of | |
305 | * drivers/video/fbmon.c | |
306 | */ | |
307 | struct drm_display_mode *drm_gtf_mode(struct drm_device *dev, int hdisplay, | |
308 | int vdisplay, int vrefresh, | |
309 | bool interlaced, int margins) | |
310 | { | |
311 | /* 1) top/bottom margin size (% of height) - default: 1.8, */ | |
312 | #define GTF_MARGIN_PERCENTAGE 18 | |
313 | /* 2) character cell horizontal granularity (pixels) - default 8 */ | |
314 | #define GTF_CELL_GRAN 8 | |
315 | /* 3) Minimum vertical porch (lines) - default 3 */ | |
316 | #define GTF_MIN_V_PORCH 1 | |
317 | /* width of vsync in lines */ | |
318 | #define V_SYNC_RQD 3 | |
319 | /* width of hsync as % of total line */ | |
320 | #define H_SYNC_PERCENT 8 | |
321 | /* min time of vsync + back porch (microsec) */ | |
322 | #define MIN_VSYNC_PLUS_BP 550 | |
323 | /* blanking formula gradient */ | |
324 | #define GTF_M 600 | |
325 | /* blanking formula offset */ | |
326 | #define GTF_C 40 | |
327 | /* blanking formula scaling factor */ | |
328 | #define GTF_K 128 | |
329 | /* blanking formula scaling factor */ | |
330 | #define GTF_J 20 | |
331 | /* C' and M' are part of the Blanking Duty Cycle computation */ | |
332 | #define GTF_C_PRIME (((GTF_C - GTF_J) * GTF_K / 256) + GTF_J) | |
333 | #define GTF_M_PRIME (GTF_K * GTF_M / 256) | |
334 | struct drm_display_mode *drm_mode; | |
335 | unsigned int hdisplay_rnd, vdisplay_rnd, vfieldrate_rqd; | |
336 | int top_margin, bottom_margin; | |
337 | int interlace; | |
338 | unsigned int hfreq_est; | |
339 | int vsync_plus_bp, vback_porch; | |
340 | unsigned int vtotal_lines, vfieldrate_est, hperiod; | |
341 | unsigned int vfield_rate, vframe_rate; | |
342 | int left_margin, right_margin; | |
343 | unsigned int total_active_pixels, ideal_duty_cycle; | |
344 | unsigned int hblank, total_pixels, pixel_freq; | |
345 | int hsync, hfront_porch, vodd_front_porch_lines; | |
346 | unsigned int tmp1, tmp2; | |
347 | ||
348 | drm_mode = drm_mode_create(dev); | |
349 | if (!drm_mode) | |
350 | return NULL; | |
351 | ||
352 | /* 1. In order to give correct results, the number of horizontal | |
353 | * pixels requested is first processed to ensure that it is divisible | |
354 | * by the character size, by rounding it to the nearest character | |
355 | * cell boundary: | |
356 | */ | |
357 | hdisplay_rnd = (hdisplay + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; | |
358 | hdisplay_rnd = hdisplay_rnd * GTF_CELL_GRAN; | |
359 | ||
360 | /* 2. If interlace is requested, the number of vertical lines assumed | |
361 | * by the calculation must be halved, as the computation calculates | |
362 | * the number of vertical lines per field. | |
363 | */ | |
364 | if (interlaced) | |
365 | vdisplay_rnd = vdisplay / 2; | |
366 | else | |
367 | vdisplay_rnd = vdisplay; | |
368 | ||
369 | /* 3. Find the frame rate required: */ | |
370 | if (interlaced) | |
371 | vfieldrate_rqd = vrefresh * 2; | |
372 | else | |
373 | vfieldrate_rqd = vrefresh; | |
374 | ||
375 | /* 4. Find number of lines in Top margin: */ | |
376 | top_margin = 0; | |
377 | if (margins) | |
378 | top_margin = (vdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / | |
379 | 1000; | |
380 | /* 5. Find number of lines in bottom margin: */ | |
381 | bottom_margin = top_margin; | |
382 | ||
383 | /* 6. If interlace is required, then set variable interlace: */ | |
384 | if (interlaced) | |
385 | interlace = 1; | |
386 | else | |
387 | interlace = 0; | |
388 | ||
389 | /* 7. Estimate the Horizontal frequency */ | |
390 | { | |
391 | tmp1 = (1000000 - MIN_VSYNC_PLUS_BP * vfieldrate_rqd) / 500; | |
392 | tmp2 = (vdisplay_rnd + 2 * top_margin + GTF_MIN_V_PORCH) * | |
393 | 2 + interlace; | |
394 | hfreq_est = (tmp2 * 1000 * vfieldrate_rqd) / tmp1; | |
395 | } | |
396 | ||
397 | /* 8. Find the number of lines in V sync + back porch */ | |
398 | /* [V SYNC+BP] = RINT(([MIN VSYNC+BP] * hfreq_est / 1000000)) */ | |
399 | vsync_plus_bp = MIN_VSYNC_PLUS_BP * hfreq_est / 1000; | |
400 | vsync_plus_bp = (vsync_plus_bp + 500) / 1000; | |
401 | /* 9. Find the number of lines in V back porch alone: */ | |
402 | vback_porch = vsync_plus_bp - V_SYNC_RQD; | |
403 | /* 10. Find the total number of lines in Vertical field period: */ | |
404 | vtotal_lines = vdisplay_rnd + top_margin + bottom_margin + | |
405 | vsync_plus_bp + GTF_MIN_V_PORCH; | |
406 | /* 11. Estimate the Vertical field frequency: */ | |
407 | vfieldrate_est = hfreq_est / vtotal_lines; | |
408 | /* 12. Find the actual horizontal period: */ | |
409 | hperiod = 1000000 / (vfieldrate_rqd * vtotal_lines); | |
410 | ||
411 | /* 13. Find the actual Vertical field frequency: */ | |
412 | vfield_rate = hfreq_est / vtotal_lines; | |
413 | /* 14. Find the Vertical frame frequency: */ | |
414 | if (interlaced) | |
415 | vframe_rate = vfield_rate / 2; | |
416 | else | |
417 | vframe_rate = vfield_rate; | |
418 | /* 15. Find number of pixels in left margin: */ | |
419 | if (margins) | |
420 | left_margin = (hdisplay_rnd * GTF_MARGIN_PERCENTAGE + 500) / | |
421 | 1000; | |
422 | else | |
423 | left_margin = 0; | |
424 | ||
425 | /* 16.Find number of pixels in right margin: */ | |
426 | right_margin = left_margin; | |
427 | /* 17.Find total number of active pixels in image and left and right */ | |
428 | total_active_pixels = hdisplay_rnd + left_margin + right_margin; | |
429 | /* 18.Find the ideal blanking duty cycle from blanking duty cycle */ | |
430 | ideal_duty_cycle = GTF_C_PRIME * 1000 - | |
431 | (GTF_M_PRIME * 1000000 / hfreq_est); | |
432 | /* 19.Find the number of pixels in the blanking time to the nearest | |
433 | * double character cell: */ | |
434 | hblank = total_active_pixels * ideal_duty_cycle / | |
435 | (100000 - ideal_duty_cycle); | |
436 | hblank = (hblank + GTF_CELL_GRAN) / (2 * GTF_CELL_GRAN); | |
437 | hblank = hblank * 2 * GTF_CELL_GRAN; | |
438 | /* 20.Find total number of pixels: */ | |
439 | total_pixels = total_active_pixels + hblank; | |
440 | /* 21.Find pixel clock frequency: */ | |
441 | pixel_freq = total_pixels * hfreq_est / 1000; | |
442 | /* Stage 1 computations are now complete; I should really pass | |
443 | * the results to another function and do the Stage 2 computations, | |
444 | * but I only need a few more values so I'll just append the | |
445 | * computations here for now */ | |
446 | /* 17. Find the number of pixels in the horizontal sync period: */ | |
447 | hsync = H_SYNC_PERCENT * total_pixels / 100; | |
448 | hsync = (hsync + GTF_CELL_GRAN / 2) / GTF_CELL_GRAN; | |
449 | hsync = hsync * GTF_CELL_GRAN; | |
450 | /* 18. Find the number of pixels in horizontal front porch period */ | |
451 | hfront_porch = hblank / 2 - hsync; | |
452 | /* 36. Find the number of lines in the odd front porch period: */ | |
453 | vodd_front_porch_lines = GTF_MIN_V_PORCH ; | |
454 | ||
455 | /* finally, pack the results in the mode struct */ | |
456 | drm_mode->hdisplay = hdisplay_rnd; | |
457 | drm_mode->hsync_start = hdisplay_rnd + hfront_porch; | |
458 | drm_mode->hsync_end = drm_mode->hsync_start + hsync; | |
459 | drm_mode->htotal = total_pixels; | |
460 | drm_mode->vdisplay = vdisplay_rnd; | |
461 | drm_mode->vsync_start = vdisplay_rnd + vodd_front_porch_lines; | |
462 | drm_mode->vsync_end = drm_mode->vsync_start + V_SYNC_RQD; | |
463 | drm_mode->vtotal = vtotal_lines; | |
464 | ||
465 | drm_mode->clock = pixel_freq; | |
466 | ||
467 | drm_mode_set_name(drm_mode); | |
468 | drm_mode->flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC; | |
469 | ||
470 | if (interlaced) { | |
471 | drm_mode->vtotal *= 2; | |
472 | drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; | |
473 | } | |
474 | ||
475 | return drm_mode; | |
476 | } | |
477 | EXPORT_SYMBOL(drm_gtf_mode); | |
f453ba04 DA |
478 | /** |
479 | * drm_mode_set_name - set the name on a mode | |
480 | * @mode: name will be set in this mode | |
481 | * | |
482 | * LOCKING: | |
483 | * None. | |
484 | * | |
485 | * Set the name of @mode to a standard format. | |
486 | */ | |
487 | void drm_mode_set_name(struct drm_display_mode *mode) | |
488 | { | |
489 | snprintf(mode->name, DRM_DISPLAY_MODE_LEN, "%dx%d", mode->hdisplay, | |
490 | mode->vdisplay); | |
491 | } | |
492 | EXPORT_SYMBOL(drm_mode_set_name); | |
493 | ||
494 | /** | |
495 | * drm_mode_list_concat - move modes from one list to another | |
496 | * @head: source list | |
497 | * @new: dst list | |
498 | * | |
499 | * LOCKING: | |
500 | * Caller must ensure both lists are locked. | |
501 | * | |
502 | * Move all the modes from @head to @new. | |
503 | */ | |
504 | void drm_mode_list_concat(struct list_head *head, struct list_head *new) | |
505 | { | |
506 | ||
507 | struct list_head *entry, *tmp; | |
508 | ||
509 | list_for_each_safe(entry, tmp, head) { | |
510 | list_move_tail(entry, new); | |
511 | } | |
512 | } | |
513 | EXPORT_SYMBOL(drm_mode_list_concat); | |
514 | ||
515 | /** | |
516 | * drm_mode_width - get the width of a mode | |
517 | * @mode: mode | |
518 | * | |
519 | * LOCKING: | |
520 | * None. | |
521 | * | |
522 | * Return @mode's width (hdisplay) value. | |
523 | * | |
524 | * FIXME: is this needed? | |
525 | * | |
526 | * RETURNS: | |
527 | * @mode->hdisplay | |
528 | */ | |
529 | int drm_mode_width(struct drm_display_mode *mode) | |
530 | { | |
531 | return mode->hdisplay; | |
532 | ||
533 | } | |
534 | EXPORT_SYMBOL(drm_mode_width); | |
535 | ||
536 | /** | |
537 | * drm_mode_height - get the height of a mode | |
538 | * @mode: mode | |
539 | * | |
540 | * LOCKING: | |
541 | * None. | |
542 | * | |
543 | * Return @mode's height (vdisplay) value. | |
544 | * | |
545 | * FIXME: is this needed? | |
546 | * | |
547 | * RETURNS: | |
548 | * @mode->vdisplay | |
549 | */ | |
550 | int drm_mode_height(struct drm_display_mode *mode) | |
551 | { | |
552 | return mode->vdisplay; | |
553 | } | |
554 | EXPORT_SYMBOL(drm_mode_height); | |
555 | ||
7ac96a9c AJ |
556 | /** drm_mode_hsync - get the hsync of a mode |
557 | * @mode: mode | |
558 | * | |
559 | * LOCKING: | |
560 | * None. | |
561 | * | |
562 | * Return @modes's hsync rate in kHz, rounded to the nearest int. | |
563 | */ | |
564 | int drm_mode_hsync(struct drm_display_mode *mode) | |
565 | { | |
566 | unsigned int calc_val; | |
567 | ||
568 | if (mode->hsync) | |
569 | return mode->hsync; | |
570 | ||
571 | if (mode->htotal < 0) | |
572 | return 0; | |
573 | ||
574 | calc_val = (mode->clock * 1000) / mode->htotal; /* hsync in Hz */ | |
575 | calc_val += 500; /* round to 1000Hz */ | |
576 | calc_val /= 1000; /* truncate to kHz */ | |
577 | ||
578 | return calc_val; | |
579 | } | |
580 | EXPORT_SYMBOL(drm_mode_hsync); | |
581 | ||
f453ba04 DA |
582 | /** |
583 | * drm_mode_vrefresh - get the vrefresh of a mode | |
584 | * @mode: mode | |
585 | * | |
586 | * LOCKING: | |
587 | * None. | |
588 | * | |
7ac96a9c | 589 | * Return @mode's vrefresh rate in Hz or calculate it if necessary. |
f453ba04 DA |
590 | * |
591 | * FIXME: why is this needed? shouldn't vrefresh be set already? | |
592 | * | |
593 | * RETURNS: | |
559ee21d ZY |
594 | * Vertical refresh rate. It will be the result of actual value plus 0.5. |
595 | * If it is 70.288, it will return 70Hz. | |
596 | * If it is 59.6, it will return 60Hz. | |
f453ba04 DA |
597 | */ |
598 | int drm_mode_vrefresh(struct drm_display_mode *mode) | |
599 | { | |
600 | int refresh = 0; | |
601 | unsigned int calc_val; | |
602 | ||
603 | if (mode->vrefresh > 0) | |
604 | refresh = mode->vrefresh; | |
605 | else if (mode->htotal > 0 && mode->vtotal > 0) { | |
559ee21d ZY |
606 | int vtotal; |
607 | vtotal = mode->vtotal; | |
f453ba04 DA |
608 | /* work out vrefresh the value will be x1000 */ |
609 | calc_val = (mode->clock * 1000); | |
f453ba04 | 610 | calc_val /= mode->htotal; |
559ee21d | 611 | refresh = (calc_val + vtotal / 2) / vtotal; |
f453ba04 | 612 | |
f453ba04 DA |
613 | if (mode->flags & DRM_MODE_FLAG_INTERLACE) |
614 | refresh *= 2; | |
615 | if (mode->flags & DRM_MODE_FLAG_DBLSCAN) | |
616 | refresh /= 2; | |
617 | if (mode->vscan > 1) | |
618 | refresh /= mode->vscan; | |
619 | } | |
620 | return refresh; | |
621 | } | |
622 | EXPORT_SYMBOL(drm_mode_vrefresh); | |
623 | ||
624 | /** | |
625 | * drm_mode_set_crtcinfo - set CRTC modesetting parameters | |
626 | * @p: mode | |
627 | * @adjust_flags: unused? (FIXME) | |
628 | * | |
629 | * LOCKING: | |
630 | * None. | |
631 | * | |
632 | * Setup the CRTC modesetting parameters for @p, adjusting if necessary. | |
633 | */ | |
634 | void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags) | |
635 | { | |
636 | if ((p == NULL) || ((p->type & DRM_MODE_TYPE_CRTC_C) == DRM_MODE_TYPE_BUILTIN)) | |
637 | return; | |
638 | ||
639 | p->crtc_hdisplay = p->hdisplay; | |
640 | p->crtc_hsync_start = p->hsync_start; | |
641 | p->crtc_hsync_end = p->hsync_end; | |
642 | p->crtc_htotal = p->htotal; | |
643 | p->crtc_hskew = p->hskew; | |
644 | p->crtc_vdisplay = p->vdisplay; | |
645 | p->crtc_vsync_start = p->vsync_start; | |
646 | p->crtc_vsync_end = p->vsync_end; | |
647 | p->crtc_vtotal = p->vtotal; | |
648 | ||
649 | if (p->flags & DRM_MODE_FLAG_INTERLACE) { | |
650 | if (adjust_flags & CRTC_INTERLACE_HALVE_V) { | |
651 | p->crtc_vdisplay /= 2; | |
652 | p->crtc_vsync_start /= 2; | |
653 | p->crtc_vsync_end /= 2; | |
654 | p->crtc_vtotal /= 2; | |
655 | } | |
656 | ||
657 | p->crtc_vtotal |= 1; | |
658 | } | |
659 | ||
660 | if (p->flags & DRM_MODE_FLAG_DBLSCAN) { | |
661 | p->crtc_vdisplay *= 2; | |
662 | p->crtc_vsync_start *= 2; | |
663 | p->crtc_vsync_end *= 2; | |
664 | p->crtc_vtotal *= 2; | |
665 | } | |
666 | ||
667 | if (p->vscan > 1) { | |
668 | p->crtc_vdisplay *= p->vscan; | |
669 | p->crtc_vsync_start *= p->vscan; | |
670 | p->crtc_vsync_end *= p->vscan; | |
671 | p->crtc_vtotal *= p->vscan; | |
672 | } | |
673 | ||
674 | p->crtc_vblank_start = min(p->crtc_vsync_start, p->crtc_vdisplay); | |
675 | p->crtc_vblank_end = max(p->crtc_vsync_end, p->crtc_vtotal); | |
676 | p->crtc_hblank_start = min(p->crtc_hsync_start, p->crtc_hdisplay); | |
677 | p->crtc_hblank_end = max(p->crtc_hsync_end, p->crtc_htotal); | |
678 | ||
679 | p->crtc_hadjusted = false; | |
680 | p->crtc_vadjusted = false; | |
681 | } | |
682 | EXPORT_SYMBOL(drm_mode_set_crtcinfo); | |
683 | ||
684 | ||
685 | /** | |
686 | * drm_mode_duplicate - allocate and duplicate an existing mode | |
687 | * @m: mode to duplicate | |
688 | * | |
689 | * LOCKING: | |
690 | * None. | |
691 | * | |
692 | * Just allocate a new mode, copy the existing mode into it, and return | |
693 | * a pointer to it. Used to create new instances of established modes. | |
694 | */ | |
695 | struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev, | |
696 | struct drm_display_mode *mode) | |
697 | { | |
698 | struct drm_display_mode *nmode; | |
699 | int new_id; | |
700 | ||
701 | nmode = drm_mode_create(dev); | |
702 | if (!nmode) | |
703 | return NULL; | |
704 | ||
705 | new_id = nmode->base.id; | |
706 | *nmode = *mode; | |
707 | nmode->base.id = new_id; | |
708 | INIT_LIST_HEAD(&nmode->head); | |
709 | return nmode; | |
710 | } | |
711 | EXPORT_SYMBOL(drm_mode_duplicate); | |
712 | ||
713 | /** | |
714 | * drm_mode_equal - test modes for equality | |
715 | * @mode1: first mode | |
716 | * @mode2: second mode | |
717 | * | |
718 | * LOCKING: | |
719 | * None. | |
720 | * | |
721 | * Check to see if @mode1 and @mode2 are equivalent. | |
722 | * | |
723 | * RETURNS: | |
724 | * True if the modes are equal, false otherwise. | |
725 | */ | |
726 | bool drm_mode_equal(struct drm_display_mode *mode1, struct drm_display_mode *mode2) | |
727 | { | |
728 | /* do clock check convert to PICOS so fb modes get matched | |
729 | * the same */ | |
730 | if (mode1->clock && mode2->clock) { | |
731 | if (KHZ2PICOS(mode1->clock) != KHZ2PICOS(mode2->clock)) | |
732 | return false; | |
733 | } else if (mode1->clock != mode2->clock) | |
734 | return false; | |
735 | ||
736 | if (mode1->hdisplay == mode2->hdisplay && | |
737 | mode1->hsync_start == mode2->hsync_start && | |
738 | mode1->hsync_end == mode2->hsync_end && | |
739 | mode1->htotal == mode2->htotal && | |
740 | mode1->hskew == mode2->hskew && | |
741 | mode1->vdisplay == mode2->vdisplay && | |
742 | mode1->vsync_start == mode2->vsync_start && | |
743 | mode1->vsync_end == mode2->vsync_end && | |
744 | mode1->vtotal == mode2->vtotal && | |
745 | mode1->vscan == mode2->vscan && | |
746 | mode1->flags == mode2->flags) | |
747 | return true; | |
748 | ||
749 | return false; | |
750 | } | |
751 | EXPORT_SYMBOL(drm_mode_equal); | |
752 | ||
753 | /** | |
754 | * drm_mode_validate_size - make sure modes adhere to size constraints | |
755 | * @dev: DRM device | |
756 | * @mode_list: list of modes to check | |
757 | * @maxX: maximum width | |
758 | * @maxY: maximum height | |
759 | * @maxPitch: max pitch | |
760 | * | |
761 | * LOCKING: | |
762 | * Caller must hold a lock protecting @mode_list. | |
763 | * | |
764 | * The DRM device (@dev) has size and pitch limits. Here we validate the | |
765 | * modes we probed for @dev against those limits and set their status as | |
766 | * necessary. | |
767 | */ | |
768 | void drm_mode_validate_size(struct drm_device *dev, | |
769 | struct list_head *mode_list, | |
770 | int maxX, int maxY, int maxPitch) | |
771 | { | |
772 | struct drm_display_mode *mode; | |
773 | ||
774 | list_for_each_entry(mode, mode_list, head) { | |
775 | if (maxPitch > 0 && mode->hdisplay > maxPitch) | |
776 | mode->status = MODE_BAD_WIDTH; | |
777 | ||
778 | if (maxX > 0 && mode->hdisplay > maxX) | |
779 | mode->status = MODE_VIRTUAL_X; | |
780 | ||
781 | if (maxY > 0 && mode->vdisplay > maxY) | |
782 | mode->status = MODE_VIRTUAL_Y; | |
783 | } | |
784 | } | |
785 | EXPORT_SYMBOL(drm_mode_validate_size); | |
786 | ||
787 | /** | |
788 | * drm_mode_validate_clocks - validate modes against clock limits | |
789 | * @dev: DRM device | |
790 | * @mode_list: list of modes to check | |
791 | * @min: minimum clock rate array | |
792 | * @max: maximum clock rate array | |
793 | * @n_ranges: number of clock ranges (size of arrays) | |
794 | * | |
795 | * LOCKING: | |
796 | * Caller must hold a lock protecting @mode_list. | |
797 | * | |
798 | * Some code may need to check a mode list against the clock limits of the | |
799 | * device in question. This function walks the mode list, testing to make | |
800 | * sure each mode falls within a given range (defined by @min and @max | |
801 | * arrays) and sets @mode->status as needed. | |
802 | */ | |
803 | void drm_mode_validate_clocks(struct drm_device *dev, | |
804 | struct list_head *mode_list, | |
805 | int *min, int *max, int n_ranges) | |
806 | { | |
807 | struct drm_display_mode *mode; | |
808 | int i; | |
809 | ||
810 | list_for_each_entry(mode, mode_list, head) { | |
811 | bool good = false; | |
812 | for (i = 0; i < n_ranges; i++) { | |
813 | if (mode->clock >= min[i] && mode->clock <= max[i]) { | |
814 | good = true; | |
815 | break; | |
816 | } | |
817 | } | |
818 | if (!good) | |
819 | mode->status = MODE_CLOCK_RANGE; | |
820 | } | |
821 | } | |
822 | EXPORT_SYMBOL(drm_mode_validate_clocks); | |
823 | ||
824 | /** | |
825 | * drm_mode_prune_invalid - remove invalid modes from mode list | |
826 | * @dev: DRM device | |
827 | * @mode_list: list of modes to check | |
828 | * @verbose: be verbose about it | |
829 | * | |
830 | * LOCKING: | |
831 | * Caller must hold a lock protecting @mode_list. | |
832 | * | |
833 | * Once mode list generation is complete, a caller can use this routine to | |
834 | * remove invalid modes from a mode list. If any of the modes have a | |
835 | * status other than %MODE_OK, they are removed from @mode_list and freed. | |
836 | */ | |
837 | void drm_mode_prune_invalid(struct drm_device *dev, | |
838 | struct list_head *mode_list, bool verbose) | |
839 | { | |
840 | struct drm_display_mode *mode, *t; | |
841 | ||
842 | list_for_each_entry_safe(mode, t, mode_list, head) { | |
843 | if (mode->status != MODE_OK) { | |
844 | list_del(&mode->head); | |
845 | if (verbose) { | |
846 | drm_mode_debug_printmodeline(mode); | |
f940f37f | 847 | DRM_DEBUG_KMS("Not using %s mode %d\n", |
f0531859 | 848 | mode->name, mode->status); |
f453ba04 DA |
849 | } |
850 | drm_mode_destroy(dev, mode); | |
851 | } | |
852 | } | |
853 | } | |
854 | EXPORT_SYMBOL(drm_mode_prune_invalid); | |
855 | ||
856 | /** | |
857 | * drm_mode_compare - compare modes for favorability | |
858 | * @lh_a: list_head for first mode | |
859 | * @lh_b: list_head for second mode | |
860 | * | |
861 | * LOCKING: | |
862 | * None. | |
863 | * | |
864 | * Compare two modes, given by @lh_a and @lh_b, returning a value indicating | |
865 | * which is better. | |
866 | * | |
867 | * RETURNS: | |
868 | * Negative if @lh_a is better than @lh_b, zero if they're equivalent, or | |
869 | * positive if @lh_b is better than @lh_a. | |
870 | */ | |
871 | static int drm_mode_compare(struct list_head *lh_a, struct list_head *lh_b) | |
872 | { | |
873 | struct drm_display_mode *a = list_entry(lh_a, struct drm_display_mode, head); | |
874 | struct drm_display_mode *b = list_entry(lh_b, struct drm_display_mode, head); | |
875 | int diff; | |
876 | ||
877 | diff = ((b->type & DRM_MODE_TYPE_PREFERRED) != 0) - | |
878 | ((a->type & DRM_MODE_TYPE_PREFERRED) != 0); | |
879 | if (diff) | |
880 | return diff; | |
881 | diff = b->hdisplay * b->vdisplay - a->hdisplay * a->vdisplay; | |
882 | if (diff) | |
883 | return diff; | |
884 | diff = b->clock - a->clock; | |
885 | return diff; | |
886 | } | |
887 | ||
888 | /* FIXME: what we don't have a list sort function? */ | |
889 | /* list sort from Mark J Roberts (mjr@znex.org) */ | |
890 | void list_sort(struct list_head *head, | |
891 | int (*cmp)(struct list_head *a, struct list_head *b)) | |
892 | { | |
893 | struct list_head *p, *q, *e, *list, *tail, *oldhead; | |
894 | int insize, nmerges, psize, qsize, i; | |
895 | ||
896 | list = head->next; | |
897 | list_del(head); | |
898 | insize = 1; | |
899 | for (;;) { | |
900 | p = oldhead = list; | |
901 | list = tail = NULL; | |
902 | nmerges = 0; | |
903 | ||
904 | while (p) { | |
905 | nmerges++; | |
906 | q = p; | |
907 | psize = 0; | |
908 | for (i = 0; i < insize; i++) { | |
909 | psize++; | |
910 | q = q->next == oldhead ? NULL : q->next; | |
911 | if (!q) | |
912 | break; | |
913 | } | |
914 | ||
915 | qsize = insize; | |
916 | while (psize > 0 || (qsize > 0 && q)) { | |
917 | if (!psize) { | |
918 | e = q; | |
919 | q = q->next; | |
920 | qsize--; | |
921 | if (q == oldhead) | |
922 | q = NULL; | |
923 | } else if (!qsize || !q) { | |
924 | e = p; | |
925 | p = p->next; | |
926 | psize--; | |
927 | if (p == oldhead) | |
928 | p = NULL; | |
929 | } else if (cmp(p, q) <= 0) { | |
930 | e = p; | |
931 | p = p->next; | |
932 | psize--; | |
933 | if (p == oldhead) | |
934 | p = NULL; | |
935 | } else { | |
936 | e = q; | |
937 | q = q->next; | |
938 | qsize--; | |
939 | if (q == oldhead) | |
940 | q = NULL; | |
941 | } | |
942 | if (tail) | |
943 | tail->next = e; | |
944 | else | |
945 | list = e; | |
946 | e->prev = tail; | |
947 | tail = e; | |
948 | } | |
949 | p = q; | |
950 | } | |
951 | ||
952 | tail->next = list; | |
953 | list->prev = tail; | |
954 | ||
955 | if (nmerges <= 1) | |
956 | break; | |
957 | ||
958 | insize *= 2; | |
959 | } | |
960 | ||
961 | head->next = list; | |
962 | head->prev = list->prev; | |
963 | list->prev->next = head; | |
964 | list->prev = head; | |
965 | } | |
966 | ||
967 | /** | |
968 | * drm_mode_sort - sort mode list | |
969 | * @mode_list: list to sort | |
970 | * | |
971 | * LOCKING: | |
972 | * Caller must hold a lock protecting @mode_list. | |
973 | * | |
974 | * Sort @mode_list by favorability, putting good modes first. | |
975 | */ | |
976 | void drm_mode_sort(struct list_head *mode_list) | |
977 | { | |
978 | list_sort(mode_list, drm_mode_compare); | |
979 | } | |
980 | EXPORT_SYMBOL(drm_mode_sort); | |
981 | ||
982 | /** | |
983 | * drm_mode_connector_list_update - update the mode list for the connector | |
984 | * @connector: the connector to update | |
985 | * | |
986 | * LOCKING: | |
987 | * Caller must hold a lock protecting @mode_list. | |
988 | * | |
989 | * This moves the modes from the @connector probed_modes list | |
990 | * to the actual mode list. It compares the probed mode against the current | |
991 | * list and only adds different modes. All modes unverified after this point | |
992 | * will be removed by the prune invalid modes. | |
993 | */ | |
994 | void drm_mode_connector_list_update(struct drm_connector *connector) | |
995 | { | |
996 | struct drm_display_mode *mode; | |
997 | struct drm_display_mode *pmode, *pt; | |
998 | int found_it; | |
999 | ||
1000 | list_for_each_entry_safe(pmode, pt, &connector->probed_modes, | |
1001 | head) { | |
1002 | found_it = 0; | |
1003 | /* go through current modes checking for the new probed mode */ | |
1004 | list_for_each_entry(mode, &connector->modes, head) { | |
1005 | if (drm_mode_equal(pmode, mode)) { | |
1006 | found_it = 1; | |
1007 | /* if equal delete the probed mode */ | |
1008 | mode->status = pmode->status; | |
38d5487d KP |
1009 | /* Merge type bits together */ |
1010 | mode->type |= pmode->type; | |
f453ba04 DA |
1011 | list_del(&pmode->head); |
1012 | drm_mode_destroy(connector->dev, pmode); | |
1013 | break; | |
1014 | } | |
1015 | } | |
1016 | ||
1017 | if (!found_it) { | |
1018 | list_move_tail(&pmode->head, &connector->modes); | |
1019 | } | |
1020 | } | |
1021 | } | |
1022 | EXPORT_SYMBOL(drm_mode_connector_list_update); |