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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / gpu / drm / amd / display / dc / dce / dce_clock_source.c
blob2e992fbc0d71844f0d0008cf5afc76cc19aef242
1 /*
2 * Copyright 2012-15 Advanced Micro Devices, Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 * Authors: AMD
23 *
24 */
25
26 #include <linux/slab.h>
27
28 #include "dm_services.h"
29
30
31 #include "dc_types.h"
32 #include "core_types.h"
33
34 #include "include/grph_object_id.h"
35 #include "include/logger_interface.h"
36
37 #include "dce_clock_source.h"
38 #include "clk_mgr.h"
39
40 #include "reg_helper.h"
41
42 #define REG(reg)\
43 (clk_src->regs->reg)
44
45 #define CTX \
46 clk_src->base.ctx
47
48 #define DC_LOGGER_INIT()
49
50 #undef FN
51 #define FN(reg_name, field_name) \
52 clk_src->cs_shift->field_name, clk_src->cs_mask->field_name
53
54 #define FRACT_FB_DIVIDER_DEC_POINTS_MAX_NUM 6
55 #define CALC_PLL_CLK_SRC_ERR_TOLERANCE 1
56 #define MAX_PLL_CALC_ERROR 0xFFFFFFFF
57
58 #define NUM_ELEMENTS(a) (sizeof(a) / sizeof((a)[0]))
59
60 static const struct spread_spectrum_data *get_ss_data_entry(
61 struct dce110_clk_src *clk_src,
62 enum signal_type signal,
63 uint32_t pix_clk_khz)
64 {
65
66 uint32_t entrys_num;
67 uint32_t i;
68 struct spread_spectrum_data *ss_parm = NULL;
69 struct spread_spectrum_data *ret = NULL;
70
71 switch (signal) {
72 case SIGNAL_TYPE_DVI_SINGLE_LINK:
73 case SIGNAL_TYPE_DVI_DUAL_LINK:
74 ss_parm = clk_src->dvi_ss_params;
75 entrys_num = clk_src->dvi_ss_params_cnt;
76 break;
77
78 case SIGNAL_TYPE_HDMI_TYPE_A:
79 ss_parm = clk_src->hdmi_ss_params;
80 entrys_num = clk_src->hdmi_ss_params_cnt;
81 break;
82
83 case SIGNAL_TYPE_LVDS:
84 ss_parm = clk_src->lvds_ss_params;
85 entrys_num = clk_src->lvds_ss_params_cnt;
86 break;
87
88 case SIGNAL_TYPE_DISPLAY_PORT:
89 case SIGNAL_TYPE_DISPLAY_PORT_MST:
90 case SIGNAL_TYPE_EDP:
91 case SIGNAL_TYPE_VIRTUAL:
92 ss_parm = clk_src->dp_ss_params;
93 entrys_num = clk_src->dp_ss_params_cnt;
94 break;
95
96 default:
97 ss_parm = NULL;
98 entrys_num = 0;
99 break;
100 }
101
102 if (ss_parm == NULL)
103 return ret;
104
105 for (i = 0; i < entrys_num; ++i, ++ss_parm) {
106 if (ss_parm->freq_range_khz >= pix_clk_khz) {
107 ret = ss_parm;
108 break;
109 }
110 }
111
112 return ret;
113 }
114
115 /**
116 * Function: calculate_fb_and_fractional_fb_divider
117 *
118 * * DESCRIPTION: Calculates feedback and fractional feedback dividers values
119 *
120 *PARAMETERS:
121 * targetPixelClock Desired frequency in 100 Hz
122 * ref_divider Reference divider (already known)
123 * postDivider Post Divider (already known)
124 * feedback_divider_param Pointer where to store
125 * calculated feedback divider value
126 * fract_feedback_divider_param Pointer where to store
127 * calculated fract feedback divider value
128 *
129 *RETURNS:
130 * It fills the locations pointed by feedback_divider_param
131 * and fract_feedback_divider_param
132 * It returns - true if feedback divider not 0
133 * - false should never happen)
134 */
135 static bool calculate_fb_and_fractional_fb_divider(
136 struct calc_pll_clock_source *calc_pll_cs,
137 uint32_t target_pix_clk_100hz,
138 uint32_t ref_divider,
139 uint32_t post_divider,
140 uint32_t *feedback_divider_param,
141 uint32_t *fract_feedback_divider_param)
142 {
143 uint64_t feedback_divider;
144
145 feedback_divider =
146 (uint64_t)target_pix_clk_100hz * ref_divider * post_divider;
147 feedback_divider *= 10;
148 /* additional factor, since we divide by 10 afterwards */
149 feedback_divider *= (uint64_t)(calc_pll_cs->fract_fb_divider_factor);
150 feedback_divider = div_u64(feedback_divider, calc_pll_cs->ref_freq_khz * 10ull);
151
152 /*Round to the number of precision
153 * The following code replace the old code (ullfeedbackDivider + 5)/10
154 * for example if the difference between the number
155 * of fractional feedback decimal point and the fractional FB Divider precision
156 * is 2 then the equation becomes (ullfeedbackDivider + 5*100) / (10*100))*/
157
158 feedback_divider += 5ULL *
159 calc_pll_cs->fract_fb_divider_precision_factor;
160 feedback_divider =
161 div_u64(feedback_divider,
162 calc_pll_cs->fract_fb_divider_precision_factor * 10);
163 feedback_divider *= (uint64_t)
164 (calc_pll_cs->fract_fb_divider_precision_factor);
165
166 *feedback_divider_param =
167 div_u64_rem(
168 feedback_divider,
169 calc_pll_cs->fract_fb_divider_factor,
170 fract_feedback_divider_param);
171
172 if (*feedback_divider_param != 0)
173 return true;
174 return false;
175 }
176
177 /**
178 *calc_fb_divider_checking_tolerance
179 *
180 *DESCRIPTION: Calculates Feedback and Fractional Feedback divider values
181 * for passed Reference and Post divider, checking for tolerance.
182 *PARAMETERS:
183 * pll_settings Pointer to structure
184 * ref_divider Reference divider (already known)
185 * postDivider Post Divider (already known)
186 * tolerance Tolerance for Calculated Pixel Clock to be within
187 *
188 *RETURNS:
189 * It fills the PLLSettings structure with PLL Dividers values
190 * if calculated values are within required tolerance
191 * It returns - true if error is within tolerance
192 * - false if error is not within tolerance
193 */
194 static bool calc_fb_divider_checking_tolerance(
195 struct calc_pll_clock_source *calc_pll_cs,
196 struct pll_settings *pll_settings,
197 uint32_t ref_divider,
198 uint32_t post_divider,
199 uint32_t tolerance)
200 {
201 uint32_t feedback_divider;
202 uint32_t fract_feedback_divider;
203 uint32_t actual_calculated_clock_100hz;
204 uint32_t abs_err;
205 uint64_t actual_calc_clk_100hz;
206
207 calculate_fb_and_fractional_fb_divider(
208 calc_pll_cs,
209 pll_settings->adjusted_pix_clk_100hz,
210 ref_divider,
211 post_divider,
212 &feedback_divider,
213 &fract_feedback_divider);
214
215 /*Actual calculated value*/
216 actual_calc_clk_100hz = (uint64_t)feedback_divider *
217 calc_pll_cs->fract_fb_divider_factor +
218 fract_feedback_divider;
219 actual_calc_clk_100hz *= calc_pll_cs->ref_freq_khz * 10;
220 actual_calc_clk_100hz =
221 div_u64(actual_calc_clk_100hz,
222 ref_divider * post_divider *
223 calc_pll_cs->fract_fb_divider_factor);
224
225 actual_calculated_clock_100hz = (uint32_t)(actual_calc_clk_100hz);
226
227 abs_err = (actual_calculated_clock_100hz >
228 pll_settings->adjusted_pix_clk_100hz)
229 ? actual_calculated_clock_100hz -
230 pll_settings->adjusted_pix_clk_100hz
231 : pll_settings->adjusted_pix_clk_100hz -
232 actual_calculated_clock_100hz;
233
234 if (abs_err <= tolerance) {
235 /*found good values*/
236 pll_settings->reference_freq = calc_pll_cs->ref_freq_khz;
237 pll_settings->reference_divider = ref_divider;
238 pll_settings->feedback_divider = feedback_divider;
239 pll_settings->fract_feedback_divider = fract_feedback_divider;
240 pll_settings->pix_clk_post_divider = post_divider;
241 pll_settings->calculated_pix_clk_100hz =
242 actual_calculated_clock_100hz;
243 pll_settings->vco_freq =
244 actual_calculated_clock_100hz * post_divider / 10;
245 return true;
246 }
247 return false;
248 }
249
250 static bool calc_pll_dividers_in_range(
251 struct calc_pll_clock_source *calc_pll_cs,
252 struct pll_settings *pll_settings,
253 uint32_t min_ref_divider,
254 uint32_t max_ref_divider,
255 uint32_t min_post_divider,
256 uint32_t max_post_divider,
257 uint32_t err_tolerance)
258 {
259 uint32_t ref_divider;
260 uint32_t post_divider;
261 uint32_t tolerance;
262
263 /* This is err_tolerance / 10000 = 0.0025 - acceptable error of 0.25%
264 * This is errorTolerance / 10000 = 0.0001 - acceptable error of 0.01%*/
265 tolerance = (pll_settings->adjusted_pix_clk_100hz * err_tolerance) /
266 100000;
267 if (tolerance < CALC_PLL_CLK_SRC_ERR_TOLERANCE)
268 tolerance = CALC_PLL_CLK_SRC_ERR_TOLERANCE;
269
270 for (
271 post_divider = max_post_divider;
272 post_divider >= min_post_divider;
273 --post_divider) {
274 for (
275 ref_divider = min_ref_divider;
276 ref_divider <= max_ref_divider;
277 ++ref_divider) {
278 if (calc_fb_divider_checking_tolerance(
279 calc_pll_cs,
280 pll_settings,
281 ref_divider,
282 post_divider,
283 tolerance)) {
284 return true;
285 }
286 }
287 }
288
289 return false;
290 }
291
292 static uint32_t calculate_pixel_clock_pll_dividers(
293 struct calc_pll_clock_source *calc_pll_cs,
294 struct pll_settings *pll_settings)
295 {
296 uint32_t err_tolerance;
297 uint32_t min_post_divider;
298 uint32_t max_post_divider;
299 uint32_t min_ref_divider;
300 uint32_t max_ref_divider;
301
302 if (pll_settings->adjusted_pix_clk_100hz == 0) {
303 DC_LOG_ERROR(
304 "%s Bad requested pixel clock", __func__);
305 return MAX_PLL_CALC_ERROR;
306 }
307
308 /* 1) Find Post divider ranges */
309 if (pll_settings->pix_clk_post_divider) {
310 min_post_divider = pll_settings->pix_clk_post_divider;
311 max_post_divider = pll_settings->pix_clk_post_divider;
312 } else {
313 min_post_divider = calc_pll_cs->min_pix_clock_pll_post_divider;
314 if (min_post_divider * pll_settings->adjusted_pix_clk_100hz <
315 calc_pll_cs->min_vco_khz * 10) {
316 min_post_divider = calc_pll_cs->min_vco_khz * 10 /
317 pll_settings->adjusted_pix_clk_100hz;
318 if ((min_post_divider *
319 pll_settings->adjusted_pix_clk_100hz) <
320 calc_pll_cs->min_vco_khz * 10)
321 min_post_divider++;
322 }
323
324 max_post_divider = calc_pll_cs->max_pix_clock_pll_post_divider;
325 if (max_post_divider * pll_settings->adjusted_pix_clk_100hz
326 > calc_pll_cs->max_vco_khz * 10)
327 max_post_divider = calc_pll_cs->max_vco_khz * 10 /
328 pll_settings->adjusted_pix_clk_100hz;
329 }
330
331 /* 2) Find Reference divider ranges
332 * When SS is enabled, or for Display Port even without SS,
333 * pll_settings->referenceDivider is not zero.
334 * So calculate PPLL FB and fractional FB divider
335 * using the passed reference divider*/
336
337 if (pll_settings->reference_divider) {
338 min_ref_divider = pll_settings->reference_divider;
339 max_ref_divider = pll_settings->reference_divider;
340 } else {
341 min_ref_divider = ((calc_pll_cs->ref_freq_khz
342 / calc_pll_cs->max_pll_input_freq_khz)
343 > calc_pll_cs->min_pll_ref_divider)
344 ? calc_pll_cs->ref_freq_khz
345 / calc_pll_cs->max_pll_input_freq_khz
346 : calc_pll_cs->min_pll_ref_divider;
347
348 max_ref_divider = ((calc_pll_cs->ref_freq_khz
349 / calc_pll_cs->min_pll_input_freq_khz)
350 < calc_pll_cs->max_pll_ref_divider)
351 ? calc_pll_cs->ref_freq_khz /
352 calc_pll_cs->min_pll_input_freq_khz
353 : calc_pll_cs->max_pll_ref_divider;
354 }
355
356 /* If some parameters are invalid we could have scenario when "min">"max"
357 * which produced endless loop later.
358 * We should investigate why we get the wrong parameters.
359 * But to follow the similar logic when "adjustedPixelClock" is set to be 0
360 * it is better to return here than cause system hang/watchdog timeout later.
361 * ## SVS Wed 15 Jul 2009 */
362
363 if (min_post_divider > max_post_divider) {
364 DC_LOG_ERROR(
365 "%s Post divider range is invalid", __func__);
366 return MAX_PLL_CALC_ERROR;
367 }
368
369 if (min_ref_divider > max_ref_divider) {
370 DC_LOG_ERROR(
371 "%s Reference divider range is invalid", __func__);
372 return MAX_PLL_CALC_ERROR;
373 }
374
375 /* 3) Try to find PLL dividers given ranges
376 * starting with minimal error tolerance.
377 * Increase error tolerance until PLL dividers found*/
378 err_tolerance = MAX_PLL_CALC_ERROR;
379
380 while (!calc_pll_dividers_in_range(
381 calc_pll_cs,
382 pll_settings,
383 min_ref_divider,
384 max_ref_divider,
385 min_post_divider,
386 max_post_divider,
387 err_tolerance))
388 err_tolerance += (err_tolerance > 10)
389 ? (err_tolerance / 10)
390 : 1;
391
392 return err_tolerance;
393 }
394
395 static bool pll_adjust_pix_clk(
396 struct dce110_clk_src *clk_src,
397 struct pixel_clk_params *pix_clk_params,
398 struct pll_settings *pll_settings)
399 {
400 uint32_t actual_pix_clk_100hz = 0;
401 uint32_t requested_clk_100hz = 0;
402 struct bp_adjust_pixel_clock_parameters bp_adjust_pixel_clock_params = {
403 0 };
404 enum bp_result bp_result;
405 switch (pix_clk_params->signal_type) {
406 case SIGNAL_TYPE_HDMI_TYPE_A: {
407 requested_clk_100hz = pix_clk_params->requested_pix_clk_100hz;
408 if (pix_clk_params->pixel_encoding != PIXEL_ENCODING_YCBCR422) {
409 switch (pix_clk_params->color_depth) {
410 case COLOR_DEPTH_101010:
411 requested_clk_100hz = (requested_clk_100hz * 5) >> 2;
412 break; /* x1.25*/
413 case COLOR_DEPTH_121212:
414 requested_clk_100hz = (requested_clk_100hz * 6) >> 2;
415 break; /* x1.5*/
416 case COLOR_DEPTH_161616:
417 requested_clk_100hz = requested_clk_100hz * 2;
418 break; /* x2.0*/
419 default:
420 break;
421 }
422 }
423 actual_pix_clk_100hz = requested_clk_100hz;
424 }
425 break;
426
427 case SIGNAL_TYPE_DISPLAY_PORT:
428 case SIGNAL_TYPE_DISPLAY_PORT_MST:
429 case SIGNAL_TYPE_EDP:
430 requested_clk_100hz = pix_clk_params->requested_sym_clk * 10;
431 actual_pix_clk_100hz = pix_clk_params->requested_pix_clk_100hz;
432 break;
433
434 default:
435 requested_clk_100hz = pix_clk_params->requested_pix_clk_100hz;
436 actual_pix_clk_100hz = pix_clk_params->requested_pix_clk_100hz;
437 break;
438 }
439
440 bp_adjust_pixel_clock_params.pixel_clock = requested_clk_100hz / 10;
441 bp_adjust_pixel_clock_params.
442 encoder_object_id = pix_clk_params->encoder_object_id;
443 bp_adjust_pixel_clock_params.signal_type = pix_clk_params->signal_type;
444 bp_adjust_pixel_clock_params.
445 ss_enable = pix_clk_params->flags.ENABLE_SS;
446 bp_result = clk_src->bios->funcs->adjust_pixel_clock(
447 clk_src->bios, &bp_adjust_pixel_clock_params);
448 if (bp_result == BP_RESULT_OK) {
449 pll_settings->actual_pix_clk_100hz = actual_pix_clk_100hz;
450 pll_settings->adjusted_pix_clk_100hz =
451 bp_adjust_pixel_clock_params.adjusted_pixel_clock * 10;
452 pll_settings->reference_divider =
453 bp_adjust_pixel_clock_params.reference_divider;
454 pll_settings->pix_clk_post_divider =
455 bp_adjust_pixel_clock_params.pixel_clock_post_divider;
456
457 return true;
458 }
459
460 return false;
461 }
462
463 /**
464 * Calculate PLL Dividers for given Clock Value.
465 * First will call VBIOS Adjust Exec table to check if requested Pixel clock
466 * will be Adjusted based on usage.
467 * Then it will calculate PLL Dividers for this Adjusted clock using preferred
468 * method (Maximum VCO frequency).
469 *
470 * \return
471 * Calculation error in units of 0.01%
472 */
473
474 static uint32_t dce110_get_pix_clk_dividers_helper (
475 struct dce110_clk_src *clk_src,
476 struct pll_settings *pll_settings,
477 struct pixel_clk_params *pix_clk_params)
478 {
479 uint32_t field = 0;
480 uint32_t pll_calc_error = MAX_PLL_CALC_ERROR;
481 DC_LOGGER_INIT();
482 /* Check if reference clock is external (not pcie/xtalin)
483 * HW Dce80 spec:
484 * 00 - PCIE_REFCLK, 01 - XTALIN, 02 - GENERICA, 03 - GENERICB
485 * 04 - HSYNCA, 05 - GENLK_CLK, 06 - PCIE_REFCLK, 07 - DVOCLK0 */
486 REG_GET(PLL_CNTL, PLL_REF_DIV_SRC, &field);
487 pll_settings->use_external_clk = (field > 1);
488
489 /* VBIOS by default enables DP SS (spread on IDCLK) for DCE 8.0 always
490 * (we do not care any more from SI for some older DP Sink which
491 * does not report SS support, no known issues) */
492 if ((pix_clk_params->flags.ENABLE_SS) ||
493 (dc_is_dp_signal(pix_clk_params->signal_type))) {
494
495 const struct spread_spectrum_data *ss_data = get_ss_data_entry(
496 clk_src,
497 pix_clk_params->signal_type,
498 pll_settings->adjusted_pix_clk_100hz / 10);
499
500 if (NULL != ss_data)
501 pll_settings->ss_percentage = ss_data->percentage;
502 }
503
504 /* Check VBIOS AdjustPixelClock Exec table */
505 if (!pll_adjust_pix_clk(clk_src, pix_clk_params, pll_settings)) {
506 /* Should never happen, ASSERT and fill up values to be able
507 * to continue. */
508 DC_LOG_ERROR(
509 "%s: Failed to adjust pixel clock!!", __func__);
510 pll_settings->actual_pix_clk_100hz =
511 pix_clk_params->requested_pix_clk_100hz;
512 pll_settings->adjusted_pix_clk_100hz =
513 pix_clk_params->requested_pix_clk_100hz;
514
515 if (dc_is_dp_signal(pix_clk_params->signal_type))
516 pll_settings->adjusted_pix_clk_100hz = 1000000;
517 }
518
519 /* Calculate Dividers */
520 if (pix_clk_params->signal_type == SIGNAL_TYPE_HDMI_TYPE_A)
521 /*Calculate Dividers by HDMI object, no SS case or SS case */
522 pll_calc_error =
523 calculate_pixel_clock_pll_dividers(
524 &clk_src->calc_pll_hdmi,
525 pll_settings);
526 else
527 /*Calculate Dividers by default object, no SS case or SS case */
528 pll_calc_error =
529 calculate_pixel_clock_pll_dividers(
530 &clk_src->calc_pll,
531 pll_settings);
532
533 return pll_calc_error;
534 }
535
536 static void dce112_get_pix_clk_dividers_helper (
537 struct dce110_clk_src *clk_src,
538 struct pll_settings *pll_settings,
539 struct pixel_clk_params *pix_clk_params)
540 {
541 uint32_t actual_pixel_clock_100hz;
542
543 actual_pixel_clock_100hz = pix_clk_params->requested_pix_clk_100hz;
544 /* Calculate Dividers */
545 if (pix_clk_params->signal_type == SIGNAL_TYPE_HDMI_TYPE_A) {
546 switch (pix_clk_params->color_depth) {
547 case COLOR_DEPTH_101010:
548 actual_pixel_clock_100hz = (actual_pixel_clock_100hz * 5) >> 2;
549 break;
550 case COLOR_DEPTH_121212:
551 actual_pixel_clock_100hz = (actual_pixel_clock_100hz * 6) >> 2;
552 break;
553 case COLOR_DEPTH_161616:
554 actual_pixel_clock_100hz = actual_pixel_clock_100hz * 2;
555 break;
556 default:
557 break;
558 }
559 }
560 pll_settings->actual_pix_clk_100hz = actual_pixel_clock_100hz;
561 pll_settings->adjusted_pix_clk_100hz = actual_pixel_clock_100hz;
562 pll_settings->calculated_pix_clk_100hz = pix_clk_params->requested_pix_clk_100hz;
563 }
564
565 static uint32_t dce110_get_pix_clk_dividers(
566 struct clock_source *cs,
567 struct pixel_clk_params *pix_clk_params,
568 struct pll_settings *pll_settings)
569 {
570 struct dce110_clk_src *clk_src = TO_DCE110_CLK_SRC(cs);
571 uint32_t pll_calc_error = MAX_PLL_CALC_ERROR;
572 DC_LOGGER_INIT();
573
574 if (pix_clk_params == NULL || pll_settings == NULL
575 || pix_clk_params->requested_pix_clk_100hz == 0) {
576 DC_LOG_ERROR(
577 "%s: Invalid parameters!!\n", __func__);
578 return pll_calc_error;
579 }
580
581 memset(pll_settings, 0, sizeof(*pll_settings));
582
583 if (cs->id == CLOCK_SOURCE_ID_DP_DTO ||
584 cs->id == CLOCK_SOURCE_ID_EXTERNAL) {
585 pll_settings->adjusted_pix_clk_100hz = clk_src->ext_clk_khz * 10;
586 pll_settings->calculated_pix_clk_100hz = clk_src->ext_clk_khz * 10;
587 pll_settings->actual_pix_clk_100hz =
588 pix_clk_params->requested_pix_clk_100hz;
589 return 0;
590 }
591
592 pll_calc_error = dce110_get_pix_clk_dividers_helper(clk_src,
593 pll_settings, pix_clk_params);
594
595 return pll_calc_error;
596 }
597
598 static uint32_t dce112_get_pix_clk_dividers(
599 struct clock_source *cs,
600 struct pixel_clk_params *pix_clk_params,
601 struct pll_settings *pll_settings)
602 {
603 struct dce110_clk_src *clk_src = TO_DCE110_CLK_SRC(cs);
604 DC_LOGGER_INIT();
605
606 if (pix_clk_params == NULL || pll_settings == NULL
607 || pix_clk_params->requested_pix_clk_100hz == 0) {
608 DC_LOG_ERROR(
609 "%s: Invalid parameters!!\n", __func__);
610 return -1;
611 }
612
613 memset(pll_settings, 0, sizeof(*pll_settings));
614
615 if (cs->id == CLOCK_SOURCE_ID_DP_DTO ||
616 cs->id == CLOCK_SOURCE_ID_EXTERNAL) {
617 pll_settings->adjusted_pix_clk_100hz = clk_src->ext_clk_khz * 10;
618 pll_settings->calculated_pix_clk_100hz = clk_src->ext_clk_khz * 10;
619 pll_settings->actual_pix_clk_100hz =
620 pix_clk_params->requested_pix_clk_100hz;
621 return -1;
622 }
623
624 dce112_get_pix_clk_dividers_helper(clk_src,
625 pll_settings, pix_clk_params);
626
627 return 0;
628 }
629
630 static bool disable_spread_spectrum(struct dce110_clk_src *clk_src)
631 {
632 enum bp_result result;
633 struct bp_spread_spectrum_parameters bp_ss_params = {0};
634
635 bp_ss_params.pll_id = clk_src->base.id;
636
637 /*Call ASICControl to process ATOMBIOS Exec table*/
638 result = clk_src->bios->funcs->enable_spread_spectrum_on_ppll(
639 clk_src->bios,
640 &bp_ss_params,
641 false);
642
643 return result == BP_RESULT_OK;
644 }
645
646 static bool calculate_ss(
647 const struct pll_settings *pll_settings,
648 const struct spread_spectrum_data *ss_data,
649 struct delta_sigma_data *ds_data)
650 {
651 struct fixed31_32 fb_div;
652 struct fixed31_32 ss_amount;
653 struct fixed31_32 ss_nslip_amount;
654 struct fixed31_32 ss_ds_frac_amount;
655 struct fixed31_32 ss_step_size;
656 struct fixed31_32 modulation_time;
657
658 if (ds_data == NULL)
659 return false;
660 if (ss_data == NULL)
661 return false;
662 if (ss_data->percentage == 0)
663 return false;
664 if (pll_settings == NULL)
665 return false;
666
667 memset(ds_data, 0, sizeof(struct delta_sigma_data));
668
669 /* compute SS_AMOUNT_FBDIV & SS_AMOUNT_NFRAC_SLIP & SS_AMOUNT_DSFRAC*/
670 /* 6 decimal point support in fractional feedback divider */
671 fb_div = dc_fixpt_from_fraction(
672 pll_settings->fract_feedback_divider, 1000000);
673 fb_div = dc_fixpt_add_int(fb_div, pll_settings->feedback_divider);
674
675 ds_data->ds_frac_amount = 0;
676 /*spreadSpectrumPercentage is in the unit of .01%,
677 * so have to divided by 100 * 100*/
678 ss_amount = dc_fixpt_mul(
679 fb_div, dc_fixpt_from_fraction(ss_data->percentage,
680 100 * ss_data->percentage_divider));
681 ds_data->feedback_amount = dc_fixpt_floor(ss_amount);
682
683 ss_nslip_amount = dc_fixpt_sub(ss_amount,
684 dc_fixpt_from_int(ds_data->feedback_amount));
685 ss_nslip_amount = dc_fixpt_mul_int(ss_nslip_amount, 10);
686 ds_data->nfrac_amount = dc_fixpt_floor(ss_nslip_amount);
687
688 ss_ds_frac_amount = dc_fixpt_sub(ss_nslip_amount,
689 dc_fixpt_from_int(ds_data->nfrac_amount));
690 ss_ds_frac_amount = dc_fixpt_mul_int(ss_ds_frac_amount, 65536);
691 ds_data->ds_frac_amount = dc_fixpt_floor(ss_ds_frac_amount);
692
693 /* compute SS_STEP_SIZE_DSFRAC */
694 modulation_time = dc_fixpt_from_fraction(
695 pll_settings->reference_freq * 1000,
696 pll_settings->reference_divider * ss_data->modulation_freq_hz);
697
698 if (ss_data->flags.CENTER_SPREAD)
699 modulation_time = dc_fixpt_div_int(modulation_time, 4);
700 else
701 modulation_time = dc_fixpt_div_int(modulation_time, 2);
702
703 ss_step_size = dc_fixpt_div(ss_amount, modulation_time);
704 /* SS_STEP_SIZE_DSFRAC_DEC = Int(SS_STEP_SIZE * 2 ^ 16 * 10)*/
705 ss_step_size = dc_fixpt_mul_int(ss_step_size, 65536 * 10);
706 ds_data->ds_frac_size = dc_fixpt_floor(ss_step_size);
707
708 return true;
709 }
710
711 static bool enable_spread_spectrum(
712 struct dce110_clk_src *clk_src,
713 enum signal_type signal, struct pll_settings *pll_settings)
714 {
715 struct bp_spread_spectrum_parameters bp_params = {0};
716 struct delta_sigma_data d_s_data;
717 const struct spread_spectrum_data *ss_data = NULL;
718
719 ss_data = get_ss_data_entry(
720 clk_src,
721 signal,
722 pll_settings->calculated_pix_clk_100hz / 10);
723
724 /* Pixel clock PLL has been programmed to generate desired pixel clock,
725 * now enable SS on pixel clock */
726 /* TODO is it OK to return true not doing anything ??*/
727 if (ss_data != NULL && pll_settings->ss_percentage != 0) {
728 if (calculate_ss(pll_settings, ss_data, &d_s_data)) {
729 bp_params.ds.feedback_amount =
730 d_s_data.feedback_amount;
731 bp_params.ds.nfrac_amount =
732 d_s_data.nfrac_amount;
733 bp_params.ds.ds_frac_size = d_s_data.ds_frac_size;
734 bp_params.ds_frac_amount =
735 d_s_data.ds_frac_amount;
736 bp_params.flags.DS_TYPE = 1;
737 bp_params.pll_id = clk_src->base.id;
738 bp_params.percentage = ss_data->percentage;
739 if (ss_data->flags.CENTER_SPREAD)
740 bp_params.flags.CENTER_SPREAD = 1;
741 if (ss_data->flags.EXTERNAL_SS)
742 bp_params.flags.EXTERNAL_SS = 1;
743
744 if (BP_RESULT_OK !=
745 clk_src->bios->funcs->
746 enable_spread_spectrum_on_ppll(
747 clk_src->bios,
748 &bp_params,
749 true))
750 return false;
751 } else
752 return false;
753 }
754 return true;
755 }
756
757 static void dce110_program_pixel_clk_resync(
758 struct dce110_clk_src *clk_src,
759 enum signal_type signal_type,
760 enum dc_color_depth colordepth)
761 {
762 REG_UPDATE(RESYNC_CNTL,
763 DCCG_DEEP_COLOR_CNTL1, 0);
764 /*
765 24 bit mode: TMDS clock = 1.0 x pixel clock (1:1)
766 30 bit mode: TMDS clock = 1.25 x pixel clock (5:4)
767 36 bit mode: TMDS clock = 1.5 x pixel clock (3:2)
768 48 bit mode: TMDS clock = 2 x pixel clock (2:1)
769 */
770 if (signal_type != SIGNAL_TYPE_HDMI_TYPE_A)
771 return;
772
773 switch (colordepth) {
774 case COLOR_DEPTH_888:
775 REG_UPDATE(RESYNC_CNTL,
776 DCCG_DEEP_COLOR_CNTL1, 0);
777 break;
778 case COLOR_DEPTH_101010:
779 REG_UPDATE(RESYNC_CNTL,
780 DCCG_DEEP_COLOR_CNTL1, 1);
781 break;
782 case COLOR_DEPTH_121212:
783 REG_UPDATE(RESYNC_CNTL,
784 DCCG_DEEP_COLOR_CNTL1, 2);
785 break;
786 case COLOR_DEPTH_161616:
787 REG_UPDATE(RESYNC_CNTL,
788 DCCG_DEEP_COLOR_CNTL1, 3);
789 break;
790 default:
791 break;
792 }
793 }
794
795 static void dce112_program_pixel_clk_resync(
796 struct dce110_clk_src *clk_src,
797 enum signal_type signal_type,
798 enum dc_color_depth colordepth,
799 bool enable_ycbcr420)
800 {
801 uint32_t deep_color_cntl = 0;
802 uint32_t double_rate_enable = 0;
803
804 /*
805 24 bit mode: TMDS clock = 1.0 x pixel clock (1:1)
806 30 bit mode: TMDS clock = 1.25 x pixel clock (5:4)
807 36 bit mode: TMDS clock = 1.5 x pixel clock (3:2)
808 48 bit mode: TMDS clock = 2 x pixel clock (2:1)
809 */
810 if (signal_type == SIGNAL_TYPE_HDMI_TYPE_A) {
811 double_rate_enable = enable_ycbcr420 ? 1 : 0;
812
813 switch (colordepth) {
814 case COLOR_DEPTH_888:
815 deep_color_cntl = 0;
816 break;
817 case COLOR_DEPTH_101010:
818 deep_color_cntl = 1;
819 break;
820 case COLOR_DEPTH_121212:
821 deep_color_cntl = 2;
822 break;
823 case COLOR_DEPTH_161616:
824 deep_color_cntl = 3;
825 break;
826 default:
827 break;
828 }
829 }
830
831 if (clk_src->cs_mask->PHYPLLA_PIXCLK_DOUBLE_RATE_ENABLE)
832 REG_UPDATE_2(PIXCLK_RESYNC_CNTL,
833 PHYPLLA_DCCG_DEEP_COLOR_CNTL, deep_color_cntl,
834 PHYPLLA_PIXCLK_DOUBLE_RATE_ENABLE, double_rate_enable);
835 else
836 REG_UPDATE(PIXCLK_RESYNC_CNTL,
837 PHYPLLA_DCCG_DEEP_COLOR_CNTL, deep_color_cntl);
838
839 }
840
841 static bool dce110_program_pix_clk(
842 struct clock_source *clock_source,
843 struct pixel_clk_params *pix_clk_params,
844 struct pll_settings *pll_settings)
845 {
846 struct dce110_clk_src *clk_src = TO_DCE110_CLK_SRC(clock_source);
847 struct bp_pixel_clock_parameters bp_pc_params = {0};
848
849 /* First disable SS
850 * ATOMBIOS will enable by default SS on PLL for DP,
851 * do not disable it here
852 */
853 if (clock_source->id != CLOCK_SOURCE_ID_EXTERNAL &&
854 !dc_is_dp_signal(pix_clk_params->signal_type) &&
855 clock_source->ctx->dce_version <= DCE_VERSION_11_0)
856 disable_spread_spectrum(clk_src);
857
858 /*ATOMBIOS expects pixel rate adjusted by deep color ratio)*/
859 bp_pc_params.controller_id = pix_clk_params->controller_id;
860 bp_pc_params.pll_id = clock_source->id;
861 bp_pc_params.target_pixel_clock_100hz = pll_settings->actual_pix_clk_100hz;
862 bp_pc_params.encoder_object_id = pix_clk_params->encoder_object_id;
863 bp_pc_params.signal_type = pix_clk_params->signal_type;
864
865 bp_pc_params.reference_divider = pll_settings->reference_divider;
866 bp_pc_params.feedback_divider = pll_settings->feedback_divider;
867 bp_pc_params.fractional_feedback_divider =
868 pll_settings->fract_feedback_divider;
869 bp_pc_params.pixel_clock_post_divider =
870 pll_settings->pix_clk_post_divider;
871 bp_pc_params.flags.SET_EXTERNAL_REF_DIV_SRC =
872 pll_settings->use_external_clk;
873
874 if (clk_src->bios->funcs->set_pixel_clock(
875 clk_src->bios, &bp_pc_params) != BP_RESULT_OK)
876 return false;
877 /* Enable SS
878 * ATOMBIOS will enable by default SS for DP on PLL ( DP ID clock),
879 * based on HW display PLL team, SS control settings should be programmed
880 * during PLL Reset, but they do not have effect
881 * until SS_EN is asserted.*/
882 if (clock_source->id != CLOCK_SOURCE_ID_EXTERNAL
883 && !dc_is_dp_signal(pix_clk_params->signal_type)) {
884
885 if (pix_clk_params->flags.ENABLE_SS)
886 if (!enable_spread_spectrum(clk_src,
887 pix_clk_params->signal_type,
888 pll_settings))
889 return false;
890
891 /* Resync deep color DTO */
892 dce110_program_pixel_clk_resync(clk_src,
893 pix_clk_params->signal_type,
894 pix_clk_params->color_depth);
895 }
896
897 return true;
898 }
899
900 static bool dce112_program_pix_clk(
901 struct clock_source *clock_source,
902 struct pixel_clk_params *pix_clk_params,
903 struct pll_settings *pll_settings)
904 {
905 struct dce110_clk_src *clk_src = TO_DCE110_CLK_SRC(clock_source);
906 struct bp_pixel_clock_parameters bp_pc_params = {0};
907
908 #if defined(CONFIG_DRM_AMD_DC_DCN)
909 if (IS_FPGA_MAXIMUS_DC(clock_source->ctx->dce_environment)) {
910 unsigned int inst = pix_clk_params->controller_id - CONTROLLER_ID_D0;
911 unsigned dp_dto_ref_100hz = 7000000;
912 unsigned clock_100hz = pll_settings->actual_pix_clk_100hz;
913
914 /* Set DTO values: phase = target clock, modulo = reference clock */
915 REG_WRITE(PHASE[inst], clock_100hz);
916 REG_WRITE(MODULO[inst], dp_dto_ref_100hz);
917
918 /* Enable DTO */
919 REG_UPDATE(PIXEL_RATE_CNTL[inst], DP_DTO0_ENABLE, 1);
920 return true;
921 }
922 #endif
923 /* First disable SS
924 * ATOMBIOS will enable by default SS on PLL for DP,
925 * do not disable it here
926 */
927 if (clock_source->id != CLOCK_SOURCE_ID_EXTERNAL &&
928 !dc_is_dp_signal(pix_clk_params->signal_type) &&
929 clock_source->ctx->dce_version <= DCE_VERSION_11_0)
930 disable_spread_spectrum(clk_src);
931
932 /*ATOMBIOS expects pixel rate adjusted by deep color ratio)*/
933 bp_pc_params.controller_id = pix_clk_params->controller_id;
934 bp_pc_params.pll_id = clock_source->id;
935 bp_pc_params.target_pixel_clock_100hz = pll_settings->actual_pix_clk_100hz;
936 bp_pc_params.encoder_object_id = pix_clk_params->encoder_object_id;
937 bp_pc_params.signal_type = pix_clk_params->signal_type;
938
939 if (clock_source->id != CLOCK_SOURCE_ID_DP_DTO) {
940 bp_pc_params.flags.SET_GENLOCK_REF_DIV_SRC =
941 pll_settings->use_external_clk;
942 bp_pc_params.flags.SET_XTALIN_REF_SRC =
943 !pll_settings->use_external_clk;
944 if (pix_clk_params->flags.SUPPORT_YCBCR420) {
945 bp_pc_params.flags.SUPPORT_YUV_420 = 1;
946 }
947 }
948 if (clk_src->bios->funcs->set_pixel_clock(
949 clk_src->bios, &bp_pc_params) != BP_RESULT_OK)
950 return false;
951 /* Resync deep color DTO */
952 if (clock_source->id != CLOCK_SOURCE_ID_DP_DTO)
953 dce112_program_pixel_clk_resync(clk_src,
954 pix_clk_params->signal_type,
955 pix_clk_params->color_depth,
956 pix_clk_params->flags.SUPPORT_YCBCR420);
957
958 return true;
959 }
960
961
962 static bool dce110_clock_source_power_down(
963 struct clock_source *clk_src)
964 {
965 struct dce110_clk_src *dce110_clk_src = TO_DCE110_CLK_SRC(clk_src);
966 enum bp_result bp_result;
967 struct bp_pixel_clock_parameters bp_pixel_clock_params = {0};
968
969 if (clk_src->dp_clk_src)
970 return true;
971
972 /* If Pixel Clock is 0 it means Power Down Pll*/
973 bp_pixel_clock_params.controller_id = CONTROLLER_ID_UNDEFINED;
974 bp_pixel_clock_params.pll_id = clk_src->id;
975 bp_pixel_clock_params.flags.FORCE_PROGRAMMING_OF_PLL = 1;
976
977 /*Call ASICControl to process ATOMBIOS Exec table*/
978 bp_result = dce110_clk_src->bios->funcs->set_pixel_clock(
979 dce110_clk_src->bios,
980 &bp_pixel_clock_params);
981
982 return bp_result == BP_RESULT_OK;
983 }
984
985 static bool get_pixel_clk_frequency_100hz(
986 const struct clock_source *clock_source,
987 unsigned int inst,
988 unsigned int *pixel_clk_khz)
989 {
990 struct dce110_clk_src *clk_src = TO_DCE110_CLK_SRC(clock_source);
991 unsigned int clock_hz = 0;
992
993 if (clock_source->id == CLOCK_SOURCE_ID_DP_DTO) {
994 clock_hz = REG_READ(PHASE[inst]);
995
996 /* NOTE: There is agreement with VBIOS here that MODULO is
997 * programmed equal to DPREFCLK, in which case PHASE will be
998 * equivalent to pixel clock.
999 */
1000 *pixel_clk_khz = clock_hz / 100;
1001 return true;
1002 }
1003
1004 return false;
1005 }
1006
1007
1008 /* this table is use to find *1.001 and /1.001 pixel rates from non-precise pixel rate */
1009 struct pixel_rate_range_table_entry {
1010 unsigned int range_min_khz;
1011 unsigned int range_max_khz;
1012 unsigned int target_pixel_rate_khz;
1013 unsigned short mult_factor;
1014 unsigned short div_factor;
1015 };
1016
1017 static const struct pixel_rate_range_table_entry video_optimized_pixel_rates[] = {
1018 // /1.001 rates
1019 {25170, 25180, 25200, 1000, 1001}, //25.2MHz -> 25.17
1020 {59340, 59350, 59400, 1000, 1001}, //59.4Mhz -> 59.340
1021 {74170, 74180, 74250, 1000, 1001}, //74.25Mhz -> 74.1758
1022 {125870, 125880, 126000, 1000, 1001}, //126Mhz -> 125.87
1023 {148350, 148360, 148500, 1000, 1001}, //148.5Mhz -> 148.3516
1024 {167830, 167840, 168000, 1000, 1001}, //168Mhz -> 167.83
1025 {222520, 222530, 222750, 1000, 1001}, //222.75Mhz -> 222.527
1026 {257140, 257150, 257400, 1000, 1001}, //257.4Mhz -> 257.1429
1027 {296700, 296710, 297000, 1000, 1001}, //297Mhz -> 296.7033
1028 {342850, 342860, 343200, 1000, 1001}, //343.2Mhz -> 342.857
1029 {395600, 395610, 396000, 1000, 1001}, //396Mhz -> 395.6
1030 {409090, 409100, 409500, 1000, 1001}, //409.5Mhz -> 409.091
1031 {445050, 445060, 445500, 1000, 1001}, //445.5Mhz -> 445.055
1032 {467530, 467540, 468000, 1000, 1001}, //468Mhz -> 467.5325
1033 {519230, 519240, 519750, 1000, 1001}, //519.75Mhz -> 519.231
1034 {525970, 525980, 526500, 1000, 1001}, //526.5Mhz -> 525.974
1035 {545450, 545460, 546000, 1000, 1001}, //546Mhz -> 545.455
1036 {593400, 593410, 594000, 1000, 1001}, //594Mhz -> 593.4066
1037 {623370, 623380, 624000, 1000, 1001}, //624Mhz -> 623.377
1038 {692300, 692310, 693000, 1000, 1001}, //693Mhz -> 692.308
1039 {701290, 701300, 702000, 1000, 1001}, //702Mhz -> 701.2987
1040 {791200, 791210, 792000, 1000, 1001}, //792Mhz -> 791.209
1041 {890100, 890110, 891000, 1000, 1001}, //891Mhz -> 890.1099
1042 {1186810, 1186820, 1188000, 1000, 1001},//1188Mhz -> 1186.8131
1043
1044 // *1.001 rates
1045 {27020, 27030, 27000, 1001, 1000}, //27Mhz
1046 {54050, 54060, 54000, 1001, 1000}, //54Mhz
1047 {108100, 108110, 108000, 1001, 1000},//108Mhz
1048 };
1049
1050 static bool dcn20_program_pix_clk(
1051 struct clock_source *clock_source,
1052 struct pixel_clk_params *pix_clk_params,
1053 struct pll_settings *pll_settings)
1054 {
1055 dce112_program_pix_clk(clock_source, pix_clk_params, pll_settings);
1056
1057 return true;
1058 }
1059
1060 static const struct clock_source_funcs dcn20_clk_src_funcs = {
1061 .cs_power_down = dce110_clock_source_power_down,
1062 .program_pix_clk = dcn20_program_pix_clk,
1063 .get_pix_clk_dividers = dce112_get_pix_clk_dividers,
1064 .get_pixel_clk_frequency_100hz = get_pixel_clk_frequency_100hz
1065 };
1066
1067 /*****************************************/
1068 /* Constructor */
1069 /*****************************************/
1070
1071 static const struct clock_source_funcs dce112_clk_src_funcs = {
1072 .cs_power_down = dce110_clock_source_power_down,
1073 .program_pix_clk = dce112_program_pix_clk,
1074 .get_pix_clk_dividers = dce112_get_pix_clk_dividers,
1075 .get_pixel_clk_frequency_100hz = get_pixel_clk_frequency_100hz
1076 };
1077 static const struct clock_source_funcs dce110_clk_src_funcs = {
1078 .cs_power_down = dce110_clock_source_power_down,
1079 .program_pix_clk = dce110_program_pix_clk,
1080 .get_pix_clk_dividers = dce110_get_pix_clk_dividers,
1081 .get_pixel_clk_frequency_100hz = get_pixel_clk_frequency_100hz
1082 };
1083
1084
1085 static void get_ss_info_from_atombios(
1086 struct dce110_clk_src *clk_src,
1087 enum as_signal_type as_signal,
1088 struct spread_spectrum_data *spread_spectrum_data[],
1089 uint32_t *ss_entries_num)
1090 {
1091 enum bp_result bp_result = BP_RESULT_FAILURE;
1092 struct spread_spectrum_info *ss_info;
1093 struct spread_spectrum_data *ss_data;
1094 struct spread_spectrum_info *ss_info_cur;
1095 struct spread_spectrum_data *ss_data_cur;
1096 uint32_t i;
1097 DC_LOGGER_INIT();
1098 if (ss_entries_num == NULL) {
1099 DC_LOG_SYNC(
1100 "Invalid entry !!!\n");
1101 return;
1102 }
1103 if (spread_spectrum_data == NULL) {
1104 DC_LOG_SYNC(
1105 "Invalid array pointer!!!\n");
1106 return;
1107 }
1108
1109 spread_spectrum_data[0] = NULL;
1110 *ss_entries_num = 0;
1111
1112 *ss_entries_num = clk_src->bios->funcs->get_ss_entry_number(
1113 clk_src->bios,
1114 as_signal);
1115
1116 if (*ss_entries_num == 0)
1117 return;
1118
1119 ss_info = kcalloc(*ss_entries_num,
1120 sizeof(struct spread_spectrum_info),
1121 GFP_KERNEL);
1122 ss_info_cur = ss_info;
1123 if (ss_info == NULL)
1124 return;
1125
1126 ss_data = kcalloc(*ss_entries_num,
1127 sizeof(struct spread_spectrum_data),
1128 GFP_KERNEL);
1129 if (ss_data == NULL)
1130 goto out_free_info;
1131
1132 for (i = 0, ss_info_cur = ss_info;
1133 i < (*ss_entries_num);
1134 ++i, ++ss_info_cur) {
1135
1136 bp_result = clk_src->bios->funcs->get_spread_spectrum_info(
1137 clk_src->bios,
1138 as_signal,
1139 i,
1140 ss_info_cur);
1141
1142 if (bp_result != BP_RESULT_OK)
1143 goto out_free_data;
1144 }
1145
1146 for (i = 0, ss_info_cur = ss_info, ss_data_cur = ss_data;
1147 i < (*ss_entries_num);
1148 ++i, ++ss_info_cur, ++ss_data_cur) {
1149
1150 if (ss_info_cur->type.STEP_AND_DELAY_INFO != false) {
1151 DC_LOG_SYNC(
1152 "Invalid ATOMBIOS SS Table!!!\n");
1153 goto out_free_data;
1154 }
1155
1156 /* for HDMI check SS percentage,
1157 * if it is > 6 (0.06%), the ATOMBIOS table info is invalid*/
1158 if (as_signal == AS_SIGNAL_TYPE_HDMI
1159 && ss_info_cur->spread_spectrum_percentage > 6){
1160 /* invalid input, do nothing */
1161 DC_LOG_SYNC(
1162 "Invalid SS percentage ");
1163 DC_LOG_SYNC(
1164 "for HDMI in ATOMBIOS info Table!!!\n");
1165 continue;
1166 }
1167 if (ss_info_cur->spread_percentage_divider == 1000) {
1168 /* Keep previous precision from ATOMBIOS for these
1169 * in case new precision set by ATOMBIOS for these
1170 * (otherwise all code in DCE specific classes
1171 * for all previous ASICs would need
1172 * to be updated for SS calculations,
1173 * Audio SS compensation and DP DTO SS compensation
1174 * which assumes fixed SS percentage Divider = 100)*/
1175 ss_info_cur->spread_spectrum_percentage /= 10;
1176 ss_info_cur->spread_percentage_divider = 100;
1177 }
1178
1179 ss_data_cur->freq_range_khz = ss_info_cur->target_clock_range;
1180 ss_data_cur->percentage =
1181 ss_info_cur->spread_spectrum_percentage;
1182 ss_data_cur->percentage_divider =
1183 ss_info_cur->spread_percentage_divider;
1184 ss_data_cur->modulation_freq_hz =
1185 ss_info_cur->spread_spectrum_range;
1186
1187 if (ss_info_cur->type.CENTER_MODE)
1188 ss_data_cur->flags.CENTER_SPREAD = 1;
1189
1190 if (ss_info_cur->type.EXTERNAL)
1191 ss_data_cur->flags.EXTERNAL_SS = 1;
1192
1193 }
1194
1195 *spread_spectrum_data = ss_data;
1196 kfree(ss_info);
1197 return;
1198
1199 out_free_data:
1200 kfree(ss_data);
1201 *ss_entries_num = 0;
1202 out_free_info:
1203 kfree(ss_info);
1204 }
1205
1206 static void ss_info_from_atombios_create(
1207 struct dce110_clk_src *clk_src)
1208 {
1209 get_ss_info_from_atombios(
1210 clk_src,
1211 AS_SIGNAL_TYPE_DISPLAY_PORT,
1212 &clk_src->dp_ss_params,
1213 &clk_src->dp_ss_params_cnt);
1214 get_ss_info_from_atombios(
1215 clk_src,
1216 AS_SIGNAL_TYPE_HDMI,
1217 &clk_src->hdmi_ss_params,
1218 &clk_src->hdmi_ss_params_cnt);
1219 get_ss_info_from_atombios(
1220 clk_src,
1221 AS_SIGNAL_TYPE_DVI,
1222 &clk_src->dvi_ss_params,
1223 &clk_src->dvi_ss_params_cnt);
1224 get_ss_info_from_atombios(
1225 clk_src,
1226 AS_SIGNAL_TYPE_LVDS,
1227 &clk_src->lvds_ss_params,
1228 &clk_src->lvds_ss_params_cnt);
1229 }
1230
1231 static bool calc_pll_max_vco_construct(
1232 struct calc_pll_clock_source *calc_pll_cs,
1233 struct calc_pll_clock_source_init_data *init_data)
1234 {
1235 uint32_t i;
1236 struct dc_firmware_info *fw_info;
1237 if (calc_pll_cs == NULL ||
1238 init_data == NULL ||
1239 init_data->bp == NULL)
1240 return false;
1241
1242 if (!init_data->bp->fw_info_valid)
1243 return false;
1244
1245 fw_info = &init_data->bp->fw_info;
1246 calc_pll_cs->ctx = init_data->ctx;
1247 calc_pll_cs->ref_freq_khz = fw_info->pll_info.crystal_frequency;
1248 calc_pll_cs->min_vco_khz =
1249 fw_info->pll_info.min_output_pxl_clk_pll_frequency;
1250 calc_pll_cs->max_vco_khz =
1251 fw_info->pll_info.max_output_pxl_clk_pll_frequency;
1252
1253 if (init_data->max_override_input_pxl_clk_pll_freq_khz != 0)
1254 calc_pll_cs->max_pll_input_freq_khz =
1255 init_data->max_override_input_pxl_clk_pll_freq_khz;
1256 else
1257 calc_pll_cs->max_pll_input_freq_khz =
1258 fw_info->pll_info.max_input_pxl_clk_pll_frequency;
1259
1260 if (init_data->min_override_input_pxl_clk_pll_freq_khz != 0)
1261 calc_pll_cs->min_pll_input_freq_khz =
1262 init_data->min_override_input_pxl_clk_pll_freq_khz;
1263 else
1264 calc_pll_cs->min_pll_input_freq_khz =
1265 fw_info->pll_info.min_input_pxl_clk_pll_frequency;
1266
1267 calc_pll_cs->min_pix_clock_pll_post_divider =
1268 init_data->min_pix_clk_pll_post_divider;
1269 calc_pll_cs->max_pix_clock_pll_post_divider =
1270 init_data->max_pix_clk_pll_post_divider;
1271 calc_pll_cs->min_pll_ref_divider =
1272 init_data->min_pll_ref_divider;
1273 calc_pll_cs->max_pll_ref_divider =
1274 init_data->max_pll_ref_divider;
1275
1276 if (init_data->num_fract_fb_divider_decimal_point == 0 ||
1277 init_data->num_fract_fb_divider_decimal_point_precision >
1278 init_data->num_fract_fb_divider_decimal_point) {
1279 DC_LOG_ERROR(
1280 "The dec point num or precision is incorrect!");
1281 return false;
1282 }
1283 if (init_data->num_fract_fb_divider_decimal_point_precision == 0) {
1284 DC_LOG_ERROR(
1285 "Incorrect fract feedback divider precision num!");
1286 return false;
1287 }
1288
1289 calc_pll_cs->fract_fb_divider_decimal_points_num =
1290 init_data->num_fract_fb_divider_decimal_point;
1291 calc_pll_cs->fract_fb_divider_precision =
1292 init_data->num_fract_fb_divider_decimal_point_precision;
1293 calc_pll_cs->fract_fb_divider_factor = 1;
1294 for (i = 0; i < calc_pll_cs->fract_fb_divider_decimal_points_num; ++i)
1295 calc_pll_cs->fract_fb_divider_factor *= 10;
1296
1297 calc_pll_cs->fract_fb_divider_precision_factor = 1;
1298 for (
1299 i = 0;
1300 i < (calc_pll_cs->fract_fb_divider_decimal_points_num -
1301 calc_pll_cs->fract_fb_divider_precision);
1302 ++i)
1303 calc_pll_cs->fract_fb_divider_precision_factor *= 10;
1304
1305 return true;
1306 }
1307
1308 bool dce110_clk_src_construct(
1309 struct dce110_clk_src *clk_src,
1310 struct dc_context *ctx,
1311 struct dc_bios *bios,
1312 enum clock_source_id id,
1313 const struct dce110_clk_src_regs *regs,
1314 const struct dce110_clk_src_shift *cs_shift,
1315 const struct dce110_clk_src_mask *cs_mask)
1316 {
1317 struct calc_pll_clock_source_init_data calc_pll_cs_init_data_hdmi;
1318 struct calc_pll_clock_source_init_data calc_pll_cs_init_data;
1319
1320 clk_src->base.ctx = ctx;
1321 clk_src->bios = bios;
1322 clk_src->base.id = id;
1323 clk_src->base.funcs = &dce110_clk_src_funcs;
1324
1325 clk_src->regs = regs;
1326 clk_src->cs_shift = cs_shift;
1327 clk_src->cs_mask = cs_mask;
1328
1329 if (!clk_src->bios->fw_info_valid) {
1330 ASSERT_CRITICAL(false);
1331 goto unexpected_failure;
1332 }
1333
1334 clk_src->ext_clk_khz = clk_src->bios->fw_info.external_clock_source_frequency_for_dp;
1335
1336 /* structure normally used with PLL ranges from ATOMBIOS; DS on by default */
1337 calc_pll_cs_init_data.bp = bios;
1338 calc_pll_cs_init_data.min_pix_clk_pll_post_divider = 1;
1339 calc_pll_cs_init_data.max_pix_clk_pll_post_divider =
1340 clk_src->cs_mask->PLL_POST_DIV_PIXCLK;
1341 calc_pll_cs_init_data.min_pll_ref_divider = 1;
1342 calc_pll_cs_init_data.max_pll_ref_divider = clk_src->cs_mask->PLL_REF_DIV;
1343 /* when 0 use minInputPxlClkPLLFrequencyInKHz from firmwareInfo*/
1344 calc_pll_cs_init_data.min_override_input_pxl_clk_pll_freq_khz = 0;
1345 /* when 0 use maxInputPxlClkPLLFrequencyInKHz from firmwareInfo*/
1346 calc_pll_cs_init_data.max_override_input_pxl_clk_pll_freq_khz = 0;
1347 /*numberOfFractFBDividerDecimalPoints*/
1348 calc_pll_cs_init_data.num_fract_fb_divider_decimal_point =
1349 FRACT_FB_DIVIDER_DEC_POINTS_MAX_NUM;
1350 /*number of decimal point to round off for fractional feedback divider value*/
1351 calc_pll_cs_init_data.num_fract_fb_divider_decimal_point_precision =
1352 FRACT_FB_DIVIDER_DEC_POINTS_MAX_NUM;
1353 calc_pll_cs_init_data.ctx = ctx;
1354
1355 /*structure for HDMI, no SS or SS% <= 0.06% for 27 MHz Ref clock */
1356 calc_pll_cs_init_data_hdmi.bp = bios;
1357 calc_pll_cs_init_data_hdmi.min_pix_clk_pll_post_divider = 1;
1358 calc_pll_cs_init_data_hdmi.max_pix_clk_pll_post_divider =
1359 clk_src->cs_mask->PLL_POST_DIV_PIXCLK;
1360 calc_pll_cs_init_data_hdmi.min_pll_ref_divider = 1;
1361 calc_pll_cs_init_data_hdmi.max_pll_ref_divider = clk_src->cs_mask->PLL_REF_DIV;
1362 /* when 0 use minInputPxlClkPLLFrequencyInKHz from firmwareInfo*/
1363 calc_pll_cs_init_data_hdmi.min_override_input_pxl_clk_pll_freq_khz = 13500;
1364 /* when 0 use maxInputPxlClkPLLFrequencyInKHz from firmwareInfo*/
1365 calc_pll_cs_init_data_hdmi.max_override_input_pxl_clk_pll_freq_khz = 27000;
1366 /*numberOfFractFBDividerDecimalPoints*/
1367 calc_pll_cs_init_data_hdmi.num_fract_fb_divider_decimal_point =
1368 FRACT_FB_DIVIDER_DEC_POINTS_MAX_NUM;
1369 /*number of decimal point to round off for fractional feedback divider value*/
1370 calc_pll_cs_init_data_hdmi.num_fract_fb_divider_decimal_point_precision =
1371 FRACT_FB_DIVIDER_DEC_POINTS_MAX_NUM;
1372 calc_pll_cs_init_data_hdmi.ctx = ctx;
1373
1374 clk_src->ref_freq_khz = clk_src->bios->fw_info.pll_info.crystal_frequency;
1375
1376 if (clk_src->base.id == CLOCK_SOURCE_ID_EXTERNAL)
1377 return true;
1378
1379 /* PLL only from here on */
1380 ss_info_from_atombios_create(clk_src);
1381
1382 if (!calc_pll_max_vco_construct(
1383 &clk_src->calc_pll,
1384 &calc_pll_cs_init_data)) {
1385 ASSERT_CRITICAL(false);
1386 goto unexpected_failure;
1387 }
1388
1389
1390 calc_pll_cs_init_data_hdmi.
1391 min_override_input_pxl_clk_pll_freq_khz = clk_src->ref_freq_khz/2;
1392 calc_pll_cs_init_data_hdmi.
1393 max_override_input_pxl_clk_pll_freq_khz = clk_src->ref_freq_khz;
1394
1395
1396 if (!calc_pll_max_vco_construct(
1397 &clk_src->calc_pll_hdmi, &calc_pll_cs_init_data_hdmi)) {
1398 ASSERT_CRITICAL(false);
1399 goto unexpected_failure;
1400 }
1401
1402 return true;
1403
1404 unexpected_failure:
1405 return false;
1406 }
1407
1408 bool dce112_clk_src_construct(
1409 struct dce110_clk_src *clk_src,
1410 struct dc_context *ctx,
1411 struct dc_bios *bios,
1412 enum clock_source_id id,
1413 const struct dce110_clk_src_regs *regs,
1414 const struct dce110_clk_src_shift *cs_shift,
1415 const struct dce110_clk_src_mask *cs_mask)
1416 {
1417 clk_src->base.ctx = ctx;
1418 clk_src->bios = bios;
1419 clk_src->base.id = id;
1420 clk_src->base.funcs = &dce112_clk_src_funcs;
1421
1422 clk_src->regs = regs;
1423 clk_src->cs_shift = cs_shift;
1424 clk_src->cs_mask = cs_mask;
1425
1426 if (!clk_src->bios->fw_info_valid) {
1427 ASSERT_CRITICAL(false);
1428 return false;
1429 }
1430
1431 clk_src->ext_clk_khz = clk_src->bios->fw_info.external_clock_source_frequency_for_dp;
1432
1433 return true;
1434 }
1435
1436 bool dcn20_clk_src_construct(
1437 struct dce110_clk_src *clk_src,
1438 struct dc_context *ctx,
1439 struct dc_bios *bios,
1440 enum clock_source_id id,
1441 const struct dce110_clk_src_regs *regs,
1442 const struct dce110_clk_src_shift *cs_shift,
1443 const struct dce110_clk_src_mask *cs_mask)
1444 {
1445 bool ret = dce112_clk_src_construct(clk_src, ctx, bios, id, regs, cs_shift, cs_mask);
1446
1447 clk_src->base.funcs = &dcn20_clk_src_funcs;
1448
1449 return ret;
1450 }
Linux with added FPC-III support