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drm/i915/ilk: Don't disable SSC source if it's in use
[deliverable/linux.git] / drivers / gpu / drm / i915 / intel_dpll_mgr.c
CommitLineData
7abd4b35
ACO		 1/*
2 * Copyright © 2006-2016 Intel Corporation
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 (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 */
23
24#include "intel_drv.h"
25
26struct intel_shared_dpll *
8106ddbd
ACO		 27intel_get_shared_dpll_by_id(struct drm_i915_private *dev_priv,
28 enum intel_dpll_id id)
7abd4b35 29{
8106ddbd
ACO		 30 return &dev_priv->shared_dplls[id];
31}
7abd4b35 32
8106ddbd
ACO		 33enum intel_dpll_id
34intel_get_shared_dpll_id(struct drm_i915_private *dev_priv,
35 struct intel_shared_dpll *pll)
36{
37 if (WARN_ON(pll < dev_priv->shared_dplls||
38 pll > &dev_priv->shared_dplls[dev_priv->num_shared_dpll]))
39 return -1;
40
41 return (enum intel_dpll_id) (pll - dev_priv->shared_dplls);
42}
43
44void
45intel_shared_dpll_config_get(struct intel_shared_dpll_config *config,
46 struct intel_shared_dpll *pll,
47 struct intel_crtc *crtc)
48{
49 struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
50 enum intel_dpll_id id = intel_get_shared_dpll_id(dev_priv, pll);
51
52 config[id].crtc_mask |= 1 << crtc->pipe;
53}
54
55void
56intel_shared_dpll_config_put(struct intel_shared_dpll_config *config,
57 struct intel_shared_dpll *pll,
58 struct intel_crtc *crtc)
59{
60 struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
61 enum intel_dpll_id id = intel_get_shared_dpll_id(dev_priv, pll);
7abd4b35 62
8106ddbd 63 config[id].crtc_mask &= ~(1 << crtc->pipe);
7abd4b35
ACO		 64}
65
66/* For ILK+ */
67void assert_shared_dpll(struct drm_i915_private *dev_priv,
68 struct intel_shared_dpll *pll,
69 bool state)
70{
71 bool cur_state;
72 struct intel_dpll_hw_state hw_state;
73
74 if (WARN(!pll, "asserting DPLL %s with no DPLL\n", onoff(state)))
75 return;
76
2edd6443 77 cur_state = pll->funcs.get_hw_state(dev_priv, pll, &hw_state);
7abd4b35
ACO		 78 I915_STATE_WARN(cur_state != state,
79 "%s assertion failure (expected %s, current %s)\n",
80 pll->name, onoff(state), onoff(cur_state));
81}
82
83void intel_prepare_shared_dpll(struct intel_crtc *crtc)
84{
85 struct drm_device *dev = crtc->base.dev;
86 struct drm_i915_private *dev_priv = dev->dev_private;
8106ddbd 87 struct intel_shared_dpll *pll = crtc->config->shared_dpll;
7abd4b35
ACO		 88
89 if (WARN_ON(pll == NULL))
90 return;
91
fbf6d879 92 mutex_lock(&dev_priv->dpll_lock);
7abd4b35 93 WARN_ON(!pll->config.crtc_mask);
fbf6d879 94 if (!pll->active_mask) {
7abd4b35
ACO		 95 DRM_DEBUG_DRIVER("setting up %s\n", pll->name);
96 WARN_ON(pll->on);
97 assert_shared_dpll_disabled(dev_priv, pll);
98
2edd6443 99 pll->funcs.mode_set(dev_priv, pll);
7abd4b35 100 }
fbf6d879 101 mutex_unlock(&dev_priv->dpll_lock);
7abd4b35
ACO		 102}
103
104/**
105 * intel_enable_shared_dpll - enable PCH PLL
106 * @dev_priv: i915 private structure
107 * @pipe: pipe PLL to enable
108 *
109 * The PCH PLL needs to be enabled before the PCH transcoder, since it
110 * drives the transcoder clock.
111 */
112void intel_enable_shared_dpll(struct intel_crtc *crtc)
113{
114 struct drm_device *dev = crtc->base.dev;
115 struct drm_i915_private *dev_priv = dev->dev_private;
8106ddbd 116 struct intel_shared_dpll *pll = crtc->config->shared_dpll;
2dd66ebd 117 unsigned crtc_mask = 1 << drm_crtc_index(&crtc->base);
fbf6d879 118 unsigned old_mask;
7abd4b35
ACO		 119
120 if (WARN_ON(pll == NULL))
121 return;
122
fbf6d879
ML		 123 mutex_lock(&dev_priv->dpll_lock);
124 old_mask = pll->active_mask;
125
2dd66ebd
ML		 126 if (WARN_ON(!(pll->config.crtc_mask & crtc_mask)) ||
127 WARN_ON(pll->active_mask & crtc_mask))
fbf6d879 128 goto out;
7abd4b35 129
2dd66ebd
ML		 130 pll->active_mask |= crtc_mask;
131
132 DRM_DEBUG_KMS("enable %s (active %x, on? %d) for crtc %d\n",
133 pll->name, pll->active_mask, pll->on,
7abd4b35
ACO		 134 crtc->base.base.id);
135
2dd66ebd 136 if (old_mask) {
7abd4b35
ACO		 137 WARN_ON(!pll->on);
138 assert_shared_dpll_enabled(dev_priv, pll);
fbf6d879 139 goto out;
7abd4b35
ACO		 140 }
141 WARN_ON(pll->on);
142
7abd4b35 143 DRM_DEBUG_KMS("enabling %s\n", pll->name);
2edd6443 144 pll->funcs.enable(dev_priv, pll);
7abd4b35 145 pll->on = true;
fbf6d879
ML		 146
147out:
148 mutex_unlock(&dev_priv->dpll_lock);
7abd4b35
ACO		 149}
150
151void intel_disable_shared_dpll(struct intel_crtc *crtc)
152{
153 struct drm_device *dev = crtc->base.dev;
154 struct drm_i915_private *dev_priv = dev->dev_private;
8106ddbd 155 struct intel_shared_dpll *pll = crtc->config->shared_dpll;
2dd66ebd 156 unsigned crtc_mask = 1 << drm_crtc_index(&crtc->base);
7abd4b35
ACO		 157
158 /* PCH only available on ILK+ */
159 if (INTEL_INFO(dev)->gen < 5)
160 return;
161
162 if (pll == NULL)
163 return;
164
fbf6d879 165 mutex_lock(&dev_priv->dpll_lock);
a1475e77 166 if (WARN_ON(!(pll->active_mask & crtc_mask)))
fbf6d879 167 goto out;
7abd4b35 168
2dd66ebd
ML		 169 DRM_DEBUG_KMS("disable %s (active %x, on? %d) for crtc %d\n",
170 pll->name, pll->active_mask, pll->on,
7abd4b35
ACO		 171 crtc->base.base.id);
172
7abd4b35
ACO		 173 assert_shared_dpll_enabled(dev_priv, pll);
174 WARN_ON(!pll->on);
2dd66ebd
ML		 175
176 pll->active_mask &= ~crtc_mask;
177 if (pll->active_mask)
fbf6d879 178 goto out;
7abd4b35
ACO		 179
180 DRM_DEBUG_KMS("disabling %s\n", pll->name);
2edd6443 181 pll->funcs.disable(dev_priv, pll);
7abd4b35 182 pll->on = false;
fbf6d879
ML		 183
184out:
185 mutex_unlock(&dev_priv->dpll_lock);
7abd4b35
ACO		 186}
187
f9476a6c 188static struct intel_shared_dpll *
a4780b77 189intel_find_shared_dpll(struct intel_crtc *crtc,
f9476a6c
ACO		 190 struct intel_crtc_state *crtc_state,
191 enum intel_dpll_id range_min,
192 enum intel_dpll_id range_max)
a4780b77
ACO		 193{
194 struct drm_i915_private *dev_priv = crtc->base.dev->dev_private;
195 struct intel_shared_dpll *pll;
196 struct intel_shared_dpll_config *shared_dpll;
197 enum intel_dpll_id i;
7abd4b35 198
a4780b77
ACO		 199 shared_dpll = intel_atomic_get_shared_dpll_state(crtc_state->base.state);
200
f9476a6c 201 for (i = range_min; i <= range_max; i++) {
7abd4b35
ACO		 202 pll = &dev_priv->shared_dplls[i];
203
204 /* Only want to check enabled timings first */
205 if (shared_dpll[i].crtc_mask == 0)
206 continue;
207
208 if (memcmp(&crtc_state->dpll_hw_state,
209 &shared_dpll[i].hw_state,
210 sizeof(crtc_state->dpll_hw_state)) == 0) {
2dd66ebd 211 DRM_DEBUG_KMS("CRTC:%d sharing existing %s (crtc mask 0x%08x, active %x)\n",
7abd4b35
ACO		 212 crtc->base.base.id, pll->name,
213 shared_dpll[i].crtc_mask,
2dd66ebd 214 pll->active_mask);
f9476a6c 215 return pll;
7abd4b35
ACO		 216 }
217 }
218
219 /* Ok no matching timings, maybe there's a free one? */
f9476a6c 220 for (i = range_min; i <= range_max; i++) {
7abd4b35
ACO		 221 pll = &dev_priv->shared_dplls[i];
222 if (shared_dpll[i].crtc_mask == 0) {
223 DRM_DEBUG_KMS("CRTC:%d allocated %s\n",
224 crtc->base.base.id, pll->name);
f9476a6c 225 return pll;
7abd4b35
ACO		 226 }
227 }
228
f9476a6c 229 return NULL;
a4780b77
ACO		 230}
231
f9476a6c
ACO		 232static void
233intel_reference_shared_dpll(struct intel_shared_dpll *pll,
234 struct intel_crtc_state *crtc_state)
a4780b77 235{
a4780b77 236 struct intel_shared_dpll_config *shared_dpll;
f9476a6c
ACO		 237 struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
238 enum intel_dpll_id i = pll->id;
a4780b77
ACO		 239
240 shared_dpll = intel_atomic_get_shared_dpll_state(crtc_state->base.state);
241
7abd4b35
ACO		 242 if (shared_dpll[i].crtc_mask == 0)
243 shared_dpll[i].hw_state =
244 crtc_state->dpll_hw_state;
245
8106ddbd 246 crtc_state->shared_dpll = pll;
7abd4b35
ACO		 247 DRM_DEBUG_DRIVER("using %s for pipe %c\n", pll->name,
248 pipe_name(crtc->pipe));
249
8106ddbd 250 intel_shared_dpll_config_get(shared_dpll, pll, crtc);
7abd4b35
ACO		 251}
252
253void intel_shared_dpll_commit(struct drm_atomic_state *state)
254{
255 struct drm_i915_private *dev_priv = to_i915(state->dev);
256 struct intel_shared_dpll_config *shared_dpll;
257 struct intel_shared_dpll *pll;
258 enum intel_dpll_id i;
259
260 if (!to_intel_atomic_state(state)->dpll_set)
261 return;
262
263 shared_dpll = to_intel_atomic_state(state)->shared_dpll;
264 for (i = 0; i < dev_priv->num_shared_dpll; i++) {
265 pll = &dev_priv->shared_dplls[i];
266 pll->config = shared_dpll[i];
267 }
268}
269
270static bool ibx_pch_dpll_get_hw_state(struct drm_i915_private *dev_priv,
271 struct intel_shared_dpll *pll,
272 struct intel_dpll_hw_state *hw_state)
273{
274 uint32_t val;
275
276 if (!intel_display_power_get_if_enabled(dev_priv, POWER_DOMAIN_PLLS))
277 return false;
278
279 val = I915_READ(PCH_DPLL(pll->id));
280 hw_state->dpll = val;
281 hw_state->fp0 = I915_READ(PCH_FP0(pll->id));
282 hw_state->fp1 = I915_READ(PCH_FP1(pll->id));
283
284 intel_display_power_put(dev_priv, POWER_DOMAIN_PLLS);
285
286 return val & DPLL_VCO_ENABLE;
287}
288
289static void ibx_pch_dpll_mode_set(struct drm_i915_private *dev_priv,
290 struct intel_shared_dpll *pll)
291{
292 I915_WRITE(PCH_FP0(pll->id), pll->config.hw_state.fp0);
293 I915_WRITE(PCH_FP1(pll->id), pll->config.hw_state.fp1);
294}
295
296static void ibx_assert_pch_refclk_enabled(struct drm_i915_private *dev_priv)
297{
298 u32 val;
299 bool enabled;
300
2d1fe073 301 I915_STATE_WARN_ON(!(HAS_PCH_IBX(dev_priv) || HAS_PCH_CPT(dev_priv)));
7abd4b35
ACO		 302
303 val = I915_READ(PCH_DREF_CONTROL);
304 enabled = !!(val & (DREF_SSC_SOURCE_MASK | DREF_NONSPREAD_SOURCE_MASK |
305 DREF_SUPERSPREAD_SOURCE_MASK));
306 I915_STATE_WARN(!enabled, "PCH refclk assertion failure, should be active but is disabled\n");
307}
308
309static void ibx_pch_dpll_enable(struct drm_i915_private *dev_priv,
310 struct intel_shared_dpll *pll)
311{
312 /* PCH refclock must be enabled first */
313 ibx_assert_pch_refclk_enabled(dev_priv);
314
315 I915_WRITE(PCH_DPLL(pll->id), pll->config.hw_state.dpll);
316
317 /* Wait for the clocks to stabilize. */
318 POSTING_READ(PCH_DPLL(pll->id));
319 udelay(150);
320
321 /* The pixel multiplier can only be updated once the
322 * DPLL is enabled and the clocks are stable.
323 *
324 * So write it again.
325 */
326 I915_WRITE(PCH_DPLL(pll->id), pll->config.hw_state.dpll);
327 POSTING_READ(PCH_DPLL(pll->id));
328 udelay(200);
329}
330
331static void ibx_pch_dpll_disable(struct drm_i915_private *dev_priv,
332 struct intel_shared_dpll *pll)
333{
334 struct drm_device *dev = dev_priv->dev;
335 struct intel_crtc *crtc;
336
337 /* Make sure no transcoder isn't still depending on us. */
338 for_each_intel_crtc(dev, crtc) {
8106ddbd 339 if (crtc->config->shared_dpll == pll)
7abd4b35
ACO		 340 assert_pch_transcoder_disabled(dev_priv, crtc->pipe);
341 }
342
343 I915_WRITE(PCH_DPLL(pll->id), 0);
344 POSTING_READ(PCH_DPLL(pll->id));
345 udelay(200);
346}
347
f9476a6c 348static struct intel_shared_dpll *
daedf20a
ACO		 349ibx_get_dpll(struct intel_crtc *crtc, struct intel_crtc_state *crtc_state,
350 struct intel_encoder *encoder)
f9476a6c
ACO		 351{
352 struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
353 struct intel_shared_dpll *pll;
354 enum intel_dpll_id i;
355
356 if (HAS_PCH_IBX(dev_priv)) {
357 /* Ironlake PCH has a fixed PLL->PCH pipe mapping. */
358 i = (enum intel_dpll_id) crtc->pipe;
359 pll = &dev_priv->shared_dplls[i];
360
361 DRM_DEBUG_KMS("CRTC:%d using pre-allocated %s\n",
362 crtc->base.base.id, pll->name);
363 } else {
364 pll = intel_find_shared_dpll(crtc, crtc_state,
365 DPLL_ID_PCH_PLL_A,
366 DPLL_ID_PCH_PLL_B);
367 }
368
369 /* reference the pll */
370 intel_reference_shared_dpll(pll, crtc_state);
371
372 return pll;
373}
374
2edd6443
ACO		 375static const struct intel_shared_dpll_funcs ibx_pch_dpll_funcs = {
376 .mode_set = ibx_pch_dpll_mode_set,
377 .enable = ibx_pch_dpll_enable,
378 .disable = ibx_pch_dpll_disable,
379 .get_hw_state = ibx_pch_dpll_get_hw_state,
7abd4b35
ACO		 380};
381
55be2f08
ACO		 382static void hsw_ddi_wrpll_enable(struct drm_i915_private *dev_priv,
383 struct intel_shared_dpll *pll)
384{
385 I915_WRITE(WRPLL_CTL(pll->id), pll->config.hw_state.wrpll);
386 POSTING_READ(WRPLL_CTL(pll->id));
387 udelay(20);
388}
389
390static void hsw_ddi_spll_enable(struct drm_i915_private *dev_priv,
391 struct intel_shared_dpll *pll)
392{
393 I915_WRITE(SPLL_CTL, pll->config.hw_state.spll);
394 POSTING_READ(SPLL_CTL);
395 udelay(20);
396}
397
398static void hsw_ddi_wrpll_disable(struct drm_i915_private *dev_priv,
399 struct intel_shared_dpll *pll)
400{
401 uint32_t val;
402
403 val = I915_READ(WRPLL_CTL(pll->id));
404 I915_WRITE(WRPLL_CTL(pll->id), val & ~WRPLL_PLL_ENABLE);
405 POSTING_READ(WRPLL_CTL(pll->id));
406}
407
408static void hsw_ddi_spll_disable(struct drm_i915_private *dev_priv,
409 struct intel_shared_dpll *pll)
410{
411 uint32_t val;
412
413 val = I915_READ(SPLL_CTL);
414 I915_WRITE(SPLL_CTL, val & ~SPLL_PLL_ENABLE);
415 POSTING_READ(SPLL_CTL);
416}
417
418static bool hsw_ddi_wrpll_get_hw_state(struct drm_i915_private *dev_priv,
419 struct intel_shared_dpll *pll,
420 struct intel_dpll_hw_state *hw_state)
421{
422 uint32_t val;
423
424 if (!intel_display_power_get_if_enabled(dev_priv, POWER_DOMAIN_PLLS))
425 return false;
426
427 val = I915_READ(WRPLL_CTL(pll->id));
428 hw_state->wrpll = val;
429
430 intel_display_power_put(dev_priv, POWER_DOMAIN_PLLS);
431
432 return val & WRPLL_PLL_ENABLE;
433}
434
435static bool hsw_ddi_spll_get_hw_state(struct drm_i915_private *dev_priv,
436 struct intel_shared_dpll *pll,
437 struct intel_dpll_hw_state *hw_state)
438{
439 uint32_t val;
440
441 if (!intel_display_power_get_if_enabled(dev_priv, POWER_DOMAIN_PLLS))
442 return false;
443
444 val = I915_READ(SPLL_CTL);
445 hw_state->spll = val;
446
447 intel_display_power_put(dev_priv, POWER_DOMAIN_PLLS);
448
449 return val & SPLL_PLL_ENABLE;
450}
451
daedf20a
ACO		 452static uint32_t hsw_pll_to_ddi_pll_sel(struct intel_shared_dpll *pll)
453{
454 switch (pll->id) {
455 case DPLL_ID_WRPLL1:
456 return PORT_CLK_SEL_WRPLL1;
457 case DPLL_ID_WRPLL2:
458 return PORT_CLK_SEL_WRPLL2;
459 case DPLL_ID_SPLL:
460 return PORT_CLK_SEL_SPLL;
9d16da65
ACO		 461 case DPLL_ID_LCPLL_810:
462 return PORT_CLK_SEL_LCPLL_810;
463 case DPLL_ID_LCPLL_1350:
464 return PORT_CLK_SEL_LCPLL_1350;
465 case DPLL_ID_LCPLL_2700:
466 return PORT_CLK_SEL_LCPLL_2700;
daedf20a
ACO		 467 default:
468 return PORT_CLK_SEL_NONE;
469 }
470}
471
472#define LC_FREQ 2700
473#define LC_FREQ_2K U64_C(LC_FREQ * 2000)
474
475#define P_MIN 2
476#define P_MAX 64
477#define P_INC 2
478
479/* Constraints for PLL good behavior */
480#define REF_MIN 48
481#define REF_MAX 400
482#define VCO_MIN 2400
483#define VCO_MAX 4800
484
485struct hsw_wrpll_rnp {
486 unsigned p, n2, r2;
487};
488
489static unsigned hsw_wrpll_get_budget_for_freq(int clock)
490{
491 unsigned budget;
492
493 switch (clock) {
494 case 25175000:
495 case 25200000:
496 case 27000000:
497 case 27027000:
498 case 37762500:
499 case 37800000:
500 case 40500000:
501 case 40541000:
502 case 54000000:
503 case 54054000:
504 case 59341000:
505 case 59400000:
506 case 72000000:
507 case 74176000:
508 case 74250000:
509 case 81000000:
510 case 81081000:
511 case 89012000:
512 case 89100000:
513 case 108000000:
514 case 108108000:
515 case 111264000:
516 case 111375000:
517 case 148352000:
518 case 148500000:
519 case 162000000:
520 case 162162000:
521 case 222525000:
522 case 222750000:
523 case 296703000:
524 case 297000000:
525 budget = 0;
526 break;
527 case 233500000:
528 case 245250000:
529 case 247750000:
530 case 253250000:
531 case 298000000:
532 budget = 1500;
533 break;
534 case 169128000:
535 case 169500000:
536 case 179500000:
537 case 202000000:
538 budget = 2000;
539 break;
540 case 256250000:
541 case 262500000:
542 case 270000000:
543 case 272500000:
544 case 273750000:
545 case 280750000:
546 case 281250000:
547 case 286000000:
548 case 291750000:
549 budget = 4000;
550 break;
551 case 267250000:
552 case 268500000:
553 budget = 5000;
554 break;
555 default:
556 budget = 1000;
557 break;
558 }
559
560 return budget;
561}
562
563static void hsw_wrpll_update_rnp(uint64_t freq2k, unsigned budget,
564 unsigned r2, unsigned n2, unsigned p,
565 struct hsw_wrpll_rnp *best)
566{
567 uint64_t a, b, c, d, diff, diff_best;
568
569 /* No best (r,n,p) yet */
570 if (best->p == 0) {
571 best->p = p;
572 best->n2 = n2;
573 best->r2 = r2;
574 return;
575 }
576
577 /*
578 * Output clock is (LC_FREQ_2K / 2000) * N / (P * R), which compares to
579 * freq2k.
580 *
581 * delta = 1e6 *
582 * abs(freq2k - (LC_FREQ_2K * n2/(p * r2))) /
583 * freq2k;
584 *
585 * and we would like delta <= budget.
586 *
587 * If the discrepancy is above the PPM-based budget, always prefer to
588 * improve upon the previous solution. However, if you're within the
589 * budget, try to maximize Ref * VCO, that is N / (P * R^2).
590 */
591 a = freq2k * budget * p * r2;
592 b = freq2k * budget * best->p * best->r2;
593 diff = abs_diff(freq2k * p * r2, LC_FREQ_2K * n2);
594 diff_best = abs_diff(freq2k * best->p * best->r2,
595 LC_FREQ_2K * best->n2);
596 c = 1000000 * diff;
597 d = 1000000 * diff_best;
598
599 if (a < c && b < d) {
600 /* If both are above the budget, pick the closer */
601 if (best->p * best->r2 * diff < p * r2 * diff_best) {
602 best->p = p;
603 best->n2 = n2;
604 best->r2 = r2;
605 }
606 } else if (a >= c && b < d) {
607 /* If A is below the threshold but B is above it? Update. */
608 best->p = p;
609 best->n2 = n2;
610 best->r2 = r2;
611 } else if (a >= c && b >= d) {
612 /* Both are below the limit, so pick the higher n2/(r2*r2) */
613 if (n2 * best->r2 * best->r2 > best->n2 * r2 * r2) {
614 best->p = p;
615 best->n2 = n2;
616 best->r2 = r2;
617 }
618 }
619 /* Otherwise a < c && b >= d, do nothing */
620}
621
622static void
623hsw_ddi_calculate_wrpll(int clock /* in Hz */,
624 unsigned *r2_out, unsigned *n2_out, unsigned *p_out)
625{
626 uint64_t freq2k;
627 unsigned p, n2, r2;
628 struct hsw_wrpll_rnp best = { 0, 0, 0 };
629 unsigned budget;
630
631 freq2k = clock / 100;
632
633 budget = hsw_wrpll_get_budget_for_freq(clock);
634
635 /* Special case handling for 540 pixel clock: bypass WR PLL entirely
636 * and directly pass the LC PLL to it. */
637 if (freq2k == 5400000) {
638 *n2_out = 2;
639 *p_out = 1;
640 *r2_out = 2;
641 return;
642 }
643
644 /*
645 * Ref = LC_FREQ / R, where Ref is the actual reference input seen by
646 * the WR PLL.
647 *
648 * We want R so that REF_MIN <= Ref <= REF_MAX.
649 * Injecting R2 = 2 * R gives:
650 * REF_MAX * r2 > LC_FREQ * 2 and
651 * REF_MIN * r2 < LC_FREQ * 2
652 *
653 * Which means the desired boundaries for r2 are:
654 * LC_FREQ * 2 / REF_MAX < r2 < LC_FREQ * 2 / REF_MIN
655 *
656 */
657 for (r2 = LC_FREQ * 2 / REF_MAX + 1;
658 r2 <= LC_FREQ * 2 / REF_MIN;
659 r2++) {
660
661 /*
662 * VCO = N * Ref, that is: VCO = N * LC_FREQ / R
663 *
664 * Once again we want VCO_MIN <= VCO <= VCO_MAX.
665 * Injecting R2 = 2 * R and N2 = 2 * N, we get:
666 * VCO_MAX * r2 > n2 * LC_FREQ and
667 * VCO_MIN * r2 < n2 * LC_FREQ)
668 *
669 * Which means the desired boundaries for n2 are:
670 * VCO_MIN * r2 / LC_FREQ < n2 < VCO_MAX * r2 / LC_FREQ
671 */
672 for (n2 = VCO_MIN * r2 / LC_FREQ + 1;
673 n2 <= VCO_MAX * r2 / LC_FREQ;
674 n2++) {
675
676 for (p = P_MIN; p <= P_MAX; p += P_INC)
677 hsw_wrpll_update_rnp(freq2k, budget,
678 r2, n2, p, &best);
679 }
680 }
681
682 *n2_out = best.n2;
683 *p_out = best.p;
684 *r2_out = best.r2;
685}
686
f9476a6c 687static struct intel_shared_dpll *
daedf20a
ACO		 688hsw_get_dpll(struct intel_crtc *crtc, struct intel_crtc_state *crtc_state,
689 struct intel_encoder *encoder)
f9476a6c 690{
9d16da65 691 struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
f9476a6c 692 struct intel_shared_dpll *pll;
daedf20a 693 int clock = crtc_state->port_clock;
f9476a6c 694
9d16da65
ACO		 695 memset(&crtc_state->dpll_hw_state, 0,
696 sizeof(crtc_state->dpll_hw_state));
697
daedf20a
ACO		 698 if (encoder->type == INTEL_OUTPUT_HDMI) {
699 uint32_t val;
700 unsigned p, n2, r2;
701
702 hsw_ddi_calculate_wrpll(clock * 1000, &r2, &n2, &p);
703
704 val = WRPLL_PLL_ENABLE | WRPLL_PLL_LCPLL |
705 WRPLL_DIVIDER_REFERENCE(r2) | WRPLL_DIVIDER_FEEDBACK(n2) |
706 WRPLL_DIVIDER_POST(p);
707
daedf20a
ACO		 708 crtc_state->dpll_hw_state.wrpll = val;
709
710 pll = intel_find_shared_dpll(crtc, crtc_state,
711 DPLL_ID_WRPLL1, DPLL_ID_WRPLL2);
712
9d16da65
ACO		 713 } else if (encoder->type == INTEL_OUTPUT_DISPLAYPORT ||
714 encoder->type == INTEL_OUTPUT_DP_MST ||
715 encoder->type == INTEL_OUTPUT_EDP) {
716 enum intel_dpll_id pll_id;
717
718 switch (clock / 2) {
719 case 81000:
720 pll_id = DPLL_ID_LCPLL_810;
721 break;
722 case 135000:
723 pll_id = DPLL_ID_LCPLL_1350;
724 break;
725 case 270000:
726 pll_id = DPLL_ID_LCPLL_2700;
727 break;
728 default:
729 DRM_DEBUG_KMS("Invalid clock for DP: %d\n", clock);
730 return NULL;
731 }
732
733 pll = intel_get_shared_dpll_by_id(dev_priv, pll_id);
734
daedf20a
ACO		 735 } else if (encoder->type == INTEL_OUTPUT_ANALOG) {
736 if (WARN_ON(crtc_state->port_clock / 2 != 135000))
737 return NULL;
738
daedf20a
ACO		 739 crtc_state->dpll_hw_state.spll =
740 SPLL_PLL_ENABLE | SPLL_PLL_FREQ_1350MHz | SPLL_PLL_SSC;
741
742 pll = intel_find_shared_dpll(crtc, crtc_state,
743 DPLL_ID_SPLL, DPLL_ID_SPLL);
744 } else {
745 return NULL;
746 }
747
748 if (!pll)
749 return NULL;
750
751 crtc_state->ddi_pll_sel = hsw_pll_to_ddi_pll_sel(pll);
752
753 intel_reference_shared_dpll(pll, crtc_state);
f9476a6c
ACO		 754
755 return pll;
756}
757
55be2f08 758
2edd6443
ACO		 759static const struct intel_shared_dpll_funcs hsw_ddi_wrpll_funcs = {
760 .enable = hsw_ddi_wrpll_enable,
761 .disable = hsw_ddi_wrpll_disable,
762 .get_hw_state = hsw_ddi_wrpll_get_hw_state,
55be2f08
ACO		 763};
764
2edd6443
ACO		 765static const struct intel_shared_dpll_funcs hsw_ddi_spll_funcs = {
766 .enable = hsw_ddi_spll_enable,
767 .disable = hsw_ddi_spll_disable,
768 .get_hw_state = hsw_ddi_spll_get_hw_state,
55be2f08
ACO		 769};
770
9d16da65
ACO		 771static void hsw_ddi_lcpll_enable(struct drm_i915_private *dev_priv,
772 struct intel_shared_dpll *pll)
773{
774}
775
776static void hsw_ddi_lcpll_disable(struct drm_i915_private *dev_priv,
777 struct intel_shared_dpll *pll)
778{
779}
780
781static bool hsw_ddi_lcpll_get_hw_state(struct drm_i915_private *dev_priv,
782 struct intel_shared_dpll *pll,
783 struct intel_dpll_hw_state *hw_state)
784{
785 return true;
786}
787
788static const struct intel_shared_dpll_funcs hsw_ddi_lcpll_funcs = {
789 .enable = hsw_ddi_lcpll_enable,
790 .disable = hsw_ddi_lcpll_disable,
791 .get_hw_state = hsw_ddi_lcpll_get_hw_state,
792};
793
55be2f08
ACO		 794struct skl_dpll_regs {
795 i915_reg_t ctl, cfgcr1, cfgcr2;
796};
797
798/* this array is indexed by the *shared* pll id */
a3c988ea
ACO		 799static const struct skl_dpll_regs skl_dpll_regs[4] = {
800 {
801 /* DPLL 0 */
802 .ctl = LCPLL1_CTL,
803 /* DPLL 0 doesn't support HDMI mode */
804 },
55be2f08
ACO		 805 {
806 /* DPLL 1 */
807 .ctl = LCPLL2_CTL,
808 .cfgcr1 = DPLL_CFGCR1(SKL_DPLL1),
809 .cfgcr2 = DPLL_CFGCR2(SKL_DPLL1),
810 },
811 {
812 /* DPLL 2 */
813 .ctl = WRPLL_CTL(0),
814 .cfgcr1 = DPLL_CFGCR1(SKL_DPLL2),
815 .cfgcr2 = DPLL_CFGCR2(SKL_DPLL2),
816 },
817 {
818 /* DPLL 3 */
819 .ctl = WRPLL_CTL(1),
820 .cfgcr1 = DPLL_CFGCR1(SKL_DPLL3),
821 .cfgcr2 = DPLL_CFGCR2(SKL_DPLL3),
822 },
823};
824
a3c988ea
ACO		 825static void skl_ddi_pll_write_ctrl1(struct drm_i915_private *dev_priv,
826 struct intel_shared_dpll *pll)
55be2f08
ACO		 827{
828 uint32_t val;
55be2f08
ACO		 829
830 val = I915_READ(DPLL_CTRL1);
831
a3c988ea
ACO		 832 val &= ~(DPLL_CTRL1_HDMI_MODE(pll->id) | DPLL_CTRL1_SSC(pll->id) |
833 DPLL_CTRL1_LINK_RATE_MASK(pll->id));
834 val |= pll->config.hw_state.ctrl1 << (pll->id * 6);
55be2f08
ACO		 835
836 I915_WRITE(DPLL_CTRL1, val);
837 POSTING_READ(DPLL_CTRL1);
a3c988ea
ACO		 838}
839
840static void skl_ddi_pll_enable(struct drm_i915_private *dev_priv,
841 struct intel_shared_dpll *pll)
842{
843 const struct skl_dpll_regs *regs = skl_dpll_regs;
844
845 skl_ddi_pll_write_ctrl1(dev_priv, pll);
55be2f08
ACO		 846
847 I915_WRITE(regs[pll->id].cfgcr1, pll->config.hw_state.cfgcr1);
848 I915_WRITE(regs[pll->id].cfgcr2, pll->config.hw_state.cfgcr2);
849 POSTING_READ(regs[pll->id].cfgcr1);
850 POSTING_READ(regs[pll->id].cfgcr2);
851
852 /* the enable bit is always bit 31 */
853 I915_WRITE(regs[pll->id].ctl,
854 I915_READ(regs[pll->id].ctl) | LCPLL_PLL_ENABLE);
855
a3c988ea
ACO		 856 if (wait_for(I915_READ(DPLL_STATUS) & DPLL_LOCK(pll->id), 5))
857 DRM_ERROR("DPLL %d not locked\n", pll->id);
858}
859
860static void skl_ddi_dpll0_enable(struct drm_i915_private *dev_priv,
861 struct intel_shared_dpll *pll)
862{
863 skl_ddi_pll_write_ctrl1(dev_priv, pll);
55be2f08
ACO		 864}
865
866static void skl_ddi_pll_disable(struct drm_i915_private *dev_priv,
867 struct intel_shared_dpll *pll)
868{
869 const struct skl_dpll_regs *regs = skl_dpll_regs;
870
871 /* the enable bit is always bit 31 */
872 I915_WRITE(regs[pll->id].ctl,
873 I915_READ(regs[pll->id].ctl) & ~LCPLL_PLL_ENABLE);
874 POSTING_READ(regs[pll->id].ctl);
875}
876
a3c988ea
ACO		 877static void skl_ddi_dpll0_disable(struct drm_i915_private *dev_priv,
878 struct intel_shared_dpll *pll)
879{
880}
881
55be2f08
ACO		 882static bool skl_ddi_pll_get_hw_state(struct drm_i915_private *dev_priv,
883 struct intel_shared_dpll *pll,
884 struct intel_dpll_hw_state *hw_state)
885{
886 uint32_t val;
55be2f08
ACO		 887 const struct skl_dpll_regs *regs = skl_dpll_regs;
888 bool ret;
889
890 if (!intel_display_power_get_if_enabled(dev_priv, POWER_DOMAIN_PLLS))
891 return false;
892
893 ret = false;
894
55be2f08
ACO		 895 val = I915_READ(regs[pll->id].ctl);
896 if (!(val & LCPLL_PLL_ENABLE))
897 goto out;
898
899 val = I915_READ(DPLL_CTRL1);
a3c988ea 900 hw_state->ctrl1 = (val >> (pll->id * 6)) & 0x3f;
55be2f08
ACO		 901
902 /* avoid reading back stale values if HDMI mode is not enabled */
a3c988ea 903 if (val & DPLL_CTRL1_HDMI_MODE(pll->id)) {
55be2f08
ACO		 904 hw_state->cfgcr1 = I915_READ(regs[pll->id].cfgcr1);
905 hw_state->cfgcr2 = I915_READ(regs[pll->id].cfgcr2);
906 }
907 ret = true;
908
909out:
910 intel_display_power_put(dev_priv, POWER_DOMAIN_PLLS);
911
912 return ret;
913}
914
a3c988ea
ACO		 915static bool skl_ddi_dpll0_get_hw_state(struct drm_i915_private *dev_priv,
916 struct intel_shared_dpll *pll,
917 struct intel_dpll_hw_state *hw_state)
918{
919 uint32_t val;
920 const struct skl_dpll_regs *regs = skl_dpll_regs;
921 bool ret;
922
923 if (!intel_display_power_get_if_enabled(dev_priv, POWER_DOMAIN_PLLS))
924 return false;
925
926 ret = false;
927
928 /* DPLL0 is always enabled since it drives CDCLK */
929 val = I915_READ(regs[pll->id].ctl);
930 if (WARN_ON(!(val & LCPLL_PLL_ENABLE)))
931 goto out;
932
933 val = I915_READ(DPLL_CTRL1);
934 hw_state->ctrl1 = (val >> (pll->id * 6)) & 0x3f;
935
936 ret = true;
937
938out:
939 intel_display_power_put(dev_priv, POWER_DOMAIN_PLLS);
940
941 return ret;
942}
943
304b65cb
ACO		 944struct skl_wrpll_context {
945 uint64_t min_deviation; /* current minimal deviation */
946 uint64_t central_freq; /* chosen central freq */
947 uint64_t dco_freq; /* chosen dco freq */
948 unsigned int p; /* chosen divider */
949};
950
951static void skl_wrpll_context_init(struct skl_wrpll_context *ctx)
952{
953 memset(ctx, 0, sizeof(*ctx));
954
955 ctx->min_deviation = U64_MAX;
956}
957
958/* DCO freq must be within +1%/-6% of the DCO central freq */
959#define SKL_DCO_MAX_PDEVIATION 100
960#define SKL_DCO_MAX_NDEVIATION 600
961
962static void skl_wrpll_try_divider(struct skl_wrpll_context *ctx,
963 uint64_t central_freq,
964 uint64_t dco_freq,
965 unsigned int divider)
966{
967 uint64_t deviation;
968
969 deviation = div64_u64(10000 * abs_diff(dco_freq, central_freq),
970 central_freq);
971
972 /* positive deviation */
973 if (dco_freq >= central_freq) {
974 if (deviation < SKL_DCO_MAX_PDEVIATION &&
975 deviation < ctx->min_deviation) {
976 ctx->min_deviation = deviation;
977 ctx->central_freq = central_freq;
978 ctx->dco_freq = dco_freq;
979 ctx->p = divider;
980 }
981 /* negative deviation */
982 } else if (deviation < SKL_DCO_MAX_NDEVIATION &&
983 deviation < ctx->min_deviation) {
984 ctx->min_deviation = deviation;
985 ctx->central_freq = central_freq;
986 ctx->dco_freq = dco_freq;
987 ctx->p = divider;
988 }
989}
990
991static void skl_wrpll_get_multipliers(unsigned int p,
992 unsigned int *p0 /* out */,
993 unsigned int *p1 /* out */,
994 unsigned int *p2 /* out */)
995{
996 /* even dividers */
997 if (p % 2 == 0) {
998 unsigned int half = p / 2;
999
1000 if (half == 1 || half == 2 || half == 3 || half == 5) {
1001 *p0 = 2;
1002 *p1 = 1;
1003 *p2 = half;
1004 } else if (half % 2 == 0) {
1005 *p0 = 2;
1006 *p1 = half / 2;
1007 *p2 = 2;
1008 } else if (half % 3 == 0) {
1009 *p0 = 3;
1010 *p1 = half / 3;
1011 *p2 = 2;
1012 } else if (half % 7 == 0) {
1013 *p0 = 7;
1014 *p1 = half / 7;
1015 *p2 = 2;
1016 }
1017 } else if (p == 3 || p == 9) { /* 3, 5, 7, 9, 15, 21, 35 */
1018 *p0 = 3;
1019 *p1 = 1;
1020 *p2 = p / 3;
1021 } else if (p == 5 || p == 7) {
1022 *p0 = p;
1023 *p1 = 1;
1024 *p2 = 1;
1025 } else if (p == 15) {
1026 *p0 = 3;
1027 *p1 = 1;
1028 *p2 = 5;
1029 } else if (p == 21) {
1030 *p0 = 7;
1031 *p1 = 1;
1032 *p2 = 3;
1033 } else if (p == 35) {
1034 *p0 = 7;
1035 *p1 = 1;
1036 *p2 = 5;
1037 }
1038}
1039
1040struct skl_wrpll_params {
1041 uint32_t dco_fraction;
1042 uint32_t dco_integer;
1043 uint32_t qdiv_ratio;
1044 uint32_t qdiv_mode;
1045 uint32_t kdiv;
1046 uint32_t pdiv;
1047 uint32_t central_freq;
1048};
1049
1050static void skl_wrpll_params_populate(struct skl_wrpll_params *params,
1051 uint64_t afe_clock,
1052 uint64_t central_freq,
1053 uint32_t p0, uint32_t p1, uint32_t p2)
1054{
1055 uint64_t dco_freq;
1056
1057 switch (central_freq) {
1058 case 9600000000ULL:
1059 params->central_freq = 0;
1060 break;
1061 case 9000000000ULL:
1062 params->central_freq = 1;
1063 break;
1064 case 8400000000ULL:
1065 params->central_freq = 3;
1066 }
1067
1068 switch (p0) {
1069 case 1:
1070 params->pdiv = 0;
1071 break;
1072 case 2:
1073 params->pdiv = 1;
1074 break;
1075 case 3:
1076 params->pdiv = 2;
1077 break;
1078 case 7:
1079 params->pdiv = 4;
1080 break;
1081 default:
1082 WARN(1, "Incorrect PDiv\n");
1083 }
1084
1085 switch (p2) {
1086 case 5:
1087 params->kdiv = 0;
1088 break;
1089 case 2:
1090 params->kdiv = 1;
1091 break;
1092 case 3:
1093 params->kdiv = 2;
1094 break;
1095 case 1:
1096 params->kdiv = 3;
1097 break;
1098 default:
1099 WARN(1, "Incorrect KDiv\n");
1100 }
1101
1102 params->qdiv_ratio = p1;
1103 params->qdiv_mode = (params->qdiv_ratio == 1) ? 0 : 1;
1104
1105 dco_freq = p0 * p1 * p2 * afe_clock;
1106
1107 /*
1108 * Intermediate values are in Hz.
1109 * Divide by MHz to match bsepc
1110 */
1111 params->dco_integer = div_u64(dco_freq, 24 * MHz(1));
1112 params->dco_fraction =
1113 div_u64((div_u64(dco_freq, 24) -
1114 params->dco_integer * MHz(1)) * 0x8000, MHz(1));
1115}
1116
1117static bool
1118skl_ddi_calculate_wrpll(int clock /* in Hz */,
1119 struct skl_wrpll_params *wrpll_params)
1120{
1121 uint64_t afe_clock = clock * 5; /* AFE Clock is 5x Pixel clock */
1122 uint64_t dco_central_freq[3] = {8400000000ULL,
1123 9000000000ULL,
1124 9600000000ULL};
1125 static const int even_dividers[] = { 4, 6, 8, 10, 12, 14, 16, 18, 20,
1126 24, 28, 30, 32, 36, 40, 42, 44,
1127 48, 52, 54, 56, 60, 64, 66, 68,
1128 70, 72, 76, 78, 80, 84, 88, 90,
1129 92, 96, 98 };
1130 static const int odd_dividers[] = { 3, 5, 7, 9, 15, 21, 35 };
1131 static const struct {
1132 const int *list;
1133 int n_dividers;
1134 } dividers[] = {
1135 { even_dividers, ARRAY_SIZE(even_dividers) },
1136 { odd_dividers, ARRAY_SIZE(odd_dividers) },
1137 };
1138 struct skl_wrpll_context ctx;
1139 unsigned int dco, d, i;
1140 unsigned int p0, p1, p2;
1141
1142 skl_wrpll_context_init(&ctx);
1143
1144 for (d = 0; d < ARRAY_SIZE(dividers); d++) {
1145 for (dco = 0; dco < ARRAY_SIZE(dco_central_freq); dco++) {
1146 for (i = 0; i < dividers[d].n_dividers; i++) {
1147 unsigned int p = dividers[d].list[i];
1148 uint64_t dco_freq = p * afe_clock;
1149
1150 skl_wrpll_try_divider(&ctx,
1151 dco_central_freq[dco],
1152 dco_freq,
1153 p);
1154 /*
1155 * Skip the remaining dividers if we're sure to
1156 * have found the definitive divider, we can't
1157 * improve a 0 deviation.
1158 */
1159 if (ctx.min_deviation == 0)
1160 goto skip_remaining_dividers;
1161 }
1162 }
1163
1164skip_remaining_dividers:
1165 /*
1166 * If a solution is found with an even divider, prefer
1167 * this one.
1168 */
1169 if (d == 0 && ctx.p)
1170 break;
1171 }
1172
1173 if (!ctx.p) {
1174 DRM_DEBUG_DRIVER("No valid divider found for %dHz\n", clock);
1175 return false;
1176 }
1177
1178 /*
1179 * gcc incorrectly analyses that these can be used without being
1180 * initialized. To be fair, it's hard to guess.
1181 */
1182 p0 = p1 = p2 = 0;
1183 skl_wrpll_get_multipliers(ctx.p, &p0, &p1, &p2);
1184 skl_wrpll_params_populate(wrpll_params, afe_clock, ctx.central_freq,
1185 p0, p1, p2);
1186
1187 return true;
1188}
1189
f9476a6c 1190static struct intel_shared_dpll *
daedf20a
ACO		 1191skl_get_dpll(struct intel_crtc *crtc, struct intel_crtc_state *crtc_state,
1192 struct intel_encoder *encoder)
f9476a6c
ACO		 1193{
1194 struct intel_shared_dpll *pll;
304b65cb
ACO		 1195 uint32_t ctrl1, cfgcr1, cfgcr2;
1196 int clock = crtc_state->port_clock;
1197
1198 /*
1199 * See comment in intel_dpll_hw_state to understand why we always use 0
1200 * as the DPLL id in this function.
1201 */
1202
1203 ctrl1 = DPLL_CTRL1_OVERRIDE(0);
1204
1205 if (encoder->type == INTEL_OUTPUT_HDMI) {
1206 struct skl_wrpll_params wrpll_params = { 0, };
1207
1208 ctrl1 |= DPLL_CTRL1_HDMI_MODE(0);
1209
1210 if (!skl_ddi_calculate_wrpll(clock * 1000, &wrpll_params))
52e2abb3 1211 return NULL;
304b65cb
ACO		 1212
1213 cfgcr1 = DPLL_CFGCR1_FREQ_ENABLE |
1214 DPLL_CFGCR1_DCO_FRACTION(wrpll_params.dco_fraction) |
1215 wrpll_params.dco_integer;
1216
1217 cfgcr2 = DPLL_CFGCR2_QDIV_RATIO(wrpll_params.qdiv_ratio) |
1218 DPLL_CFGCR2_QDIV_MODE(wrpll_params.qdiv_mode) |
1219 DPLL_CFGCR2_KDIV(wrpll_params.kdiv) |
1220 DPLL_CFGCR2_PDIV(wrpll_params.pdiv) |
1221 wrpll_params.central_freq;
1222 } else if (encoder->type == INTEL_OUTPUT_DISPLAYPORT ||
a3c988ea
ACO		 1223 encoder->type == INTEL_OUTPUT_DP_MST ||
1224 encoder->type == INTEL_OUTPUT_EDP) {
304b65cb
ACO		 1225 switch (crtc_state->port_clock / 2) {
1226 case 81000:
1227 ctrl1 |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_810, 0);
1228 break;
1229 case 135000:
1230 ctrl1 |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1350, 0);
1231 break;
1232 case 270000:
1233 ctrl1 |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_2700, 0);
1234 break;
a3c988ea
ACO		 1235 /* eDP 1.4 rates */
1236 case 162000:
1237 ctrl1 |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1620, 0);
1238 break;
a3c988ea
ACO		 1239 case 108000:
1240 ctrl1 |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1080, 0);
1241 break;
1242 case 216000:
1243 ctrl1 |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_2160, 0);
1244 break;
304b65cb
ACO		 1245 }
1246
1247 cfgcr1 = cfgcr2 = 0;
1248 } else {
1249 return NULL;
1250 }
1251
1252 memset(&crtc_state->dpll_hw_state, 0,
1253 sizeof(crtc_state->dpll_hw_state));
1254
1255 crtc_state->dpll_hw_state.ctrl1 = ctrl1;
1256 crtc_state->dpll_hw_state.cfgcr1 = cfgcr1;
1257 crtc_state->dpll_hw_state.cfgcr2 = cfgcr2;
f9476a6c 1258
a3c988ea
ACO		 1259 if (encoder->type == INTEL_OUTPUT_EDP)
1260 pll = intel_find_shared_dpll(crtc, crtc_state,
1261 DPLL_ID_SKL_DPLL0,
1262 DPLL_ID_SKL_DPLL0);
1263 else
1264 pll = intel_find_shared_dpll(crtc, crtc_state,
1265 DPLL_ID_SKL_DPLL1,
1266 DPLL_ID_SKL_DPLL3);
304b65cb
ACO		 1267 if (!pll)
1268 return NULL;
1269
a3c988ea 1270 crtc_state->ddi_pll_sel = pll->id;
304b65cb
ACO		 1271
1272 intel_reference_shared_dpll(pll, crtc_state);
f9476a6c
ACO		 1273
1274 return pll;
1275}
1276
2edd6443
ACO		 1277static const struct intel_shared_dpll_funcs skl_ddi_pll_funcs = {
1278 .enable = skl_ddi_pll_enable,
1279 .disable = skl_ddi_pll_disable,
1280 .get_hw_state = skl_ddi_pll_get_hw_state,
55be2f08
ACO		 1281};
1282
a3c988ea
ACO		 1283static const struct intel_shared_dpll_funcs skl_ddi_dpll0_funcs = {
1284 .enable = skl_ddi_dpll0_enable,
1285 .disable = skl_ddi_dpll0_disable,
1286 .get_hw_state = skl_ddi_dpll0_get_hw_state,
1287};
1288
55be2f08
ACO		 1289static void bxt_ddi_pll_enable(struct drm_i915_private *dev_priv,
1290 struct intel_shared_dpll *pll)
1291{
1292 uint32_t temp;
1293 enum port port = (enum port)pll->id; /* 1:1 port->PLL mapping */
1294
55be2f08 1295 /* Non-SSC reference */
da6110bc
DK		 1296 temp = I915_READ(BXT_PORT_PLL_ENABLE(port));
1297 temp |= PORT_PLL_REF_SEL;
55be2f08
ACO		 1298 I915_WRITE(BXT_PORT_PLL_ENABLE(port), temp);
1299
1300 /* Disable 10 bit clock */
1301 temp = I915_READ(BXT_PORT_PLL_EBB_4(port));
1302 temp &= ~PORT_PLL_10BIT_CLK_ENABLE;
1303 I915_WRITE(BXT_PORT_PLL_EBB_4(port), temp);
1304
1305 /* Write P1 & P2 */
1306 temp = I915_READ(BXT_PORT_PLL_EBB_0(port));
1307 temp &= ~(PORT_PLL_P1_MASK | PORT_PLL_P2_MASK);
1308 temp |= pll->config.hw_state.ebb0;
1309 I915_WRITE(BXT_PORT_PLL_EBB_0(port), temp);
1310
1311 /* Write M2 integer */
1312 temp = I915_READ(BXT_PORT_PLL(port, 0));
1313 temp &= ~PORT_PLL_M2_MASK;
1314 temp |= pll->config.hw_state.pll0;
1315 I915_WRITE(BXT_PORT_PLL(port, 0), temp);
1316
1317 /* Write N */
1318 temp = I915_READ(BXT_PORT_PLL(port, 1));
1319 temp &= ~PORT_PLL_N_MASK;
1320 temp |= pll->config.hw_state.pll1;
1321 I915_WRITE(BXT_PORT_PLL(port, 1), temp);
1322
1323 /* Write M2 fraction */
1324 temp = I915_READ(BXT_PORT_PLL(port, 2));
1325 temp &= ~PORT_PLL_M2_FRAC_MASK;
1326 temp |= pll->config.hw_state.pll2;
1327 I915_WRITE(BXT_PORT_PLL(port, 2), temp);
1328
1329 /* Write M2 fraction enable */
1330 temp = I915_READ(BXT_PORT_PLL(port, 3));
1331 temp &= ~PORT_PLL_M2_FRAC_ENABLE;
1332 temp |= pll->config.hw_state.pll3;
1333 I915_WRITE(BXT_PORT_PLL(port, 3), temp);
1334
1335 /* Write coeff */
1336 temp = I915_READ(BXT_PORT_PLL(port, 6));
1337 temp &= ~PORT_PLL_PROP_COEFF_MASK;
1338 temp &= ~PORT_PLL_INT_COEFF_MASK;
1339 temp &= ~PORT_PLL_GAIN_CTL_MASK;
1340 temp |= pll->config.hw_state.pll6;
1341 I915_WRITE(BXT_PORT_PLL(port, 6), temp);
1342
1343 /* Write calibration val */
1344 temp = I915_READ(BXT_PORT_PLL(port, 8));
1345 temp &= ~PORT_PLL_TARGET_CNT_MASK;
1346 temp |= pll->config.hw_state.pll8;
1347 I915_WRITE(BXT_PORT_PLL(port, 8), temp);
1348
1349 temp = I915_READ(BXT_PORT_PLL(port, 9));
1350 temp &= ~PORT_PLL_LOCK_THRESHOLD_MASK;
1351 temp |= pll->config.hw_state.pll9;
1352 I915_WRITE(BXT_PORT_PLL(port, 9), temp);
1353
1354 temp = I915_READ(BXT_PORT_PLL(port, 10));
1355 temp &= ~PORT_PLL_DCO_AMP_OVR_EN_H;
1356 temp &= ~PORT_PLL_DCO_AMP_MASK;
1357 temp |= pll->config.hw_state.pll10;
1358 I915_WRITE(BXT_PORT_PLL(port, 10), temp);
1359
1360 /* Recalibrate with new settings */
1361 temp = I915_READ(BXT_PORT_PLL_EBB_4(port));
1362 temp |= PORT_PLL_RECALIBRATE;
1363 I915_WRITE(BXT_PORT_PLL_EBB_4(port), temp);
1364 temp &= ~PORT_PLL_10BIT_CLK_ENABLE;
1365 temp |= pll->config.hw_state.ebb4;
1366 I915_WRITE(BXT_PORT_PLL_EBB_4(port), temp);
1367
1368 /* Enable PLL */
1369 temp = I915_READ(BXT_PORT_PLL_ENABLE(port));
1370 temp |= PORT_PLL_ENABLE;
1371 I915_WRITE(BXT_PORT_PLL_ENABLE(port), temp);
1372 POSTING_READ(BXT_PORT_PLL_ENABLE(port));
1373
1374 if (wait_for_atomic_us((I915_READ(BXT_PORT_PLL_ENABLE(port)) &
1375 PORT_PLL_LOCK), 200))
1376 DRM_ERROR("PLL %d not locked\n", port);
1377
1378 /*
1379 * While we write to the group register to program all lanes at once we
1380 * can read only lane registers and we pick lanes 0/1 for that.
1381 */
1382 temp = I915_READ(BXT_PORT_PCS_DW12_LN01(port));
1383 temp &= ~LANE_STAGGER_MASK;
1384 temp &= ~LANESTAGGER_STRAP_OVRD;
1385 temp |= pll->config.hw_state.pcsdw12;
1386 I915_WRITE(BXT_PORT_PCS_DW12_GRP(port), temp);
1387}
1388
1389static void bxt_ddi_pll_disable(struct drm_i915_private *dev_priv,
1390 struct intel_shared_dpll *pll)
1391{
1392 enum port port = (enum port)pll->id; /* 1:1 port->PLL mapping */
1393 uint32_t temp;
1394
1395 temp = I915_READ(BXT_PORT_PLL_ENABLE(port));
1396 temp &= ~PORT_PLL_ENABLE;
1397 I915_WRITE(BXT_PORT_PLL_ENABLE(port), temp);
1398 POSTING_READ(BXT_PORT_PLL_ENABLE(port));
1399}
1400
1401static bool bxt_ddi_pll_get_hw_state(struct drm_i915_private *dev_priv,
1402 struct intel_shared_dpll *pll,
1403 struct intel_dpll_hw_state *hw_state)
1404{
1405 enum port port = (enum port)pll->id; /* 1:1 port->PLL mapping */
1406 uint32_t val;
1407 bool ret;
1408
1409 if (!intel_display_power_get_if_enabled(dev_priv, POWER_DOMAIN_PLLS))
1410 return false;
1411
1412 ret = false;
1413
1414 val = I915_READ(BXT_PORT_PLL_ENABLE(port));
1415 if (!(val & PORT_PLL_ENABLE))
1416 goto out;
1417
1418 hw_state->ebb0 = I915_READ(BXT_PORT_PLL_EBB_0(port));
1419 hw_state->ebb0 &= PORT_PLL_P1_MASK | PORT_PLL_P2_MASK;
1420
1421 hw_state->ebb4 = I915_READ(BXT_PORT_PLL_EBB_4(port));
1422 hw_state->ebb4 &= PORT_PLL_10BIT_CLK_ENABLE;
1423
1424 hw_state->pll0 = I915_READ(BXT_PORT_PLL(port, 0));
1425 hw_state->pll0 &= PORT_PLL_M2_MASK;
1426
1427 hw_state->pll1 = I915_READ(BXT_PORT_PLL(port, 1));
1428 hw_state->pll1 &= PORT_PLL_N_MASK;
1429
1430 hw_state->pll2 = I915_READ(BXT_PORT_PLL(port, 2));
1431 hw_state->pll2 &= PORT_PLL_M2_FRAC_MASK;
1432
1433 hw_state->pll3 = I915_READ(BXT_PORT_PLL(port, 3));
1434 hw_state->pll3 &= PORT_PLL_M2_FRAC_ENABLE;
1435
1436 hw_state->pll6 = I915_READ(BXT_PORT_PLL(port, 6));
1437 hw_state->pll6 &= PORT_PLL_PROP_COEFF_MASK |
1438 PORT_PLL_INT_COEFF_MASK |
1439 PORT_PLL_GAIN_CTL_MASK;
1440
1441 hw_state->pll8 = I915_READ(BXT_PORT_PLL(port, 8));
1442 hw_state->pll8 &= PORT_PLL_TARGET_CNT_MASK;
1443
1444 hw_state->pll9 = I915_READ(BXT_PORT_PLL(port, 9));
1445 hw_state->pll9 &= PORT_PLL_LOCK_THRESHOLD_MASK;
1446
1447 hw_state->pll10 = I915_READ(BXT_PORT_PLL(port, 10));
1448 hw_state->pll10 &= PORT_PLL_DCO_AMP_OVR_EN_H |
1449 PORT_PLL_DCO_AMP_MASK;
1450
1451 /*
1452 * While we write to the group register to program all lanes at once we
1453 * can read only lane registers. We configure all lanes the same way, so
1454 * here just read out lanes 0/1 and output a note if lanes 2/3 differ.
1455 */
1456 hw_state->pcsdw12 = I915_READ(BXT_PORT_PCS_DW12_LN01(port));
1457 if (I915_READ(BXT_PORT_PCS_DW12_LN23(port)) != hw_state->pcsdw12)
1458 DRM_DEBUG_DRIVER("lane stagger config different for lane 01 (%08x) and 23 (%08x)\n",
1459 hw_state->pcsdw12,
1460 I915_READ(BXT_PORT_PCS_DW12_LN23(port)));
1461 hw_state->pcsdw12 &= LANE_STAGGER_MASK | LANESTAGGER_STRAP_OVRD;
1462
1463 ret = true;
1464
1465out:
1466 intel_display_power_put(dev_priv, POWER_DOMAIN_PLLS);
1467
1468 return ret;
1469}
1470
34177c24
ACO		 1471/* bxt clock parameters */
1472struct bxt_clk_div {
1473 int clock;
1474 uint32_t p1;
1475 uint32_t p2;
1476 uint32_t m2_int;
1477 uint32_t m2_frac;
1478 bool m2_frac_en;
1479 uint32_t n;
1480};
1481
1482/* pre-calculated values for DP linkrates */
1483static const struct bxt_clk_div bxt_dp_clk_val[] = {
1484 {162000, 4, 2, 32, 1677722, 1, 1},
1485 {270000, 4, 1, 27, 0, 0, 1},
1486 {540000, 2, 1, 27, 0, 0, 1},
1487 {216000, 3, 2, 32, 1677722, 1, 1},
1488 {243000, 4, 1, 24, 1258291, 1, 1},
1489 {324000, 4, 1, 32, 1677722, 1, 1},
1490 {432000, 3, 1, 32, 1677722, 1, 1}
1491};
1492
f9476a6c 1493static struct intel_shared_dpll *
daedf20a
ACO		 1494bxt_get_dpll(struct intel_crtc *crtc, struct intel_crtc_state *crtc_state,
1495 struct intel_encoder *encoder)
f9476a6c
ACO		 1496{
1497 struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
f9476a6c
ACO		 1498 struct intel_shared_dpll *pll;
1499 enum intel_dpll_id i;
34177c24
ACO		 1500 struct intel_digital_port *intel_dig_port;
1501 struct bxt_clk_div clk_div = {0};
1502 int vco = 0;
1503 uint32_t prop_coef, int_coef, gain_ctl, targ_cnt;
1504 uint32_t lanestagger;
1505 int clock = crtc_state->port_clock;
f9476a6c 1506
34177c24 1507 if (encoder->type == INTEL_OUTPUT_HDMI) {
9e2c8475 1508 struct dpll best_clock;
34177c24
ACO		 1509
1510 /* Calculate HDMI div */
1511 /*
1512 * FIXME: tie the following calculation into
1513 * i9xx_crtc_compute_clock
1514 */
1515 if (!bxt_find_best_dpll(crtc_state, clock, &best_clock)) {
1516 DRM_DEBUG_DRIVER("no PLL dividers found for clock %d pipe %c\n",
1517 clock, pipe_name(crtc->pipe));
1518 return NULL;
1519 }
1520
1521 clk_div.p1 = best_clock.p1;
1522 clk_div.p2 = best_clock.p2;
1523 WARN_ON(best_clock.m1 != 2);
1524 clk_div.n = best_clock.n;
1525 clk_div.m2_int = best_clock.m2 >> 22;
1526 clk_div.m2_frac = best_clock.m2 & ((1 << 22) - 1);
1527 clk_div.m2_frac_en = clk_div.m2_frac != 0;
1528
1529 vco = best_clock.vco;
1530 } else if (encoder->type == INTEL_OUTPUT_DISPLAYPORT ||
1531 encoder->type == INTEL_OUTPUT_EDP) {
1532 int i;
1533
1534 clk_div = bxt_dp_clk_val[0];
1535 for (i = 0; i < ARRAY_SIZE(bxt_dp_clk_val); ++i) {
1536 if (bxt_dp_clk_val[i].clock == clock) {
1537 clk_div = bxt_dp_clk_val[i];
1538 break;
1539 }
1540 }
1541 vco = clock * 10 / 2 * clk_div.p1 * clk_div.p2;
1542 }
1543
1544 if (vco >= 6200000 && vco <= 6700000) {
1545 prop_coef = 4;
1546 int_coef = 9;
1547 gain_ctl = 3;
1548 targ_cnt = 8;
1549 } else if ((vco > 5400000 && vco < 6200000) ||
1550 (vco >= 4800000 && vco < 5400000)) {
1551 prop_coef = 5;
1552 int_coef = 11;
1553 gain_ctl = 3;
1554 targ_cnt = 9;
1555 } else if (vco == 5400000) {
1556 prop_coef = 3;
1557 int_coef = 8;
1558 gain_ctl = 1;
1559 targ_cnt = 9;
1560 } else {
1561 DRM_ERROR("Invalid VCO\n");
f9476a6c 1562 return NULL;
34177c24
ACO		 1563 }
1564
1565 memset(&crtc_state->dpll_hw_state, 0,
1566 sizeof(crtc_state->dpll_hw_state));
1567
1568 if (clock > 270000)
1569 lanestagger = 0x18;
1570 else if (clock > 135000)
1571 lanestagger = 0x0d;
1572 else if (clock > 67000)
1573 lanestagger = 0x07;
1574 else if (clock > 33000)
1575 lanestagger = 0x04;
1576 else
1577 lanestagger = 0x02;
1578
1579 crtc_state->dpll_hw_state.ebb0 =
1580 PORT_PLL_P1(clk_div.p1) | PORT_PLL_P2(clk_div.p2);
1581 crtc_state->dpll_hw_state.pll0 = clk_div.m2_int;
1582 crtc_state->dpll_hw_state.pll1 = PORT_PLL_N(clk_div.n);
1583 crtc_state->dpll_hw_state.pll2 = clk_div.m2_frac;
1584
1585 if (clk_div.m2_frac_en)
1586 crtc_state->dpll_hw_state.pll3 =
1587 PORT_PLL_M2_FRAC_ENABLE;
1588
1589 crtc_state->dpll_hw_state.pll6 =
1590 prop_coef | PORT_PLL_INT_COEFF(int_coef);
1591 crtc_state->dpll_hw_state.pll6 |=
1592 PORT_PLL_GAIN_CTL(gain_ctl);
1593
1594 crtc_state->dpll_hw_state.pll8 = targ_cnt;
1595
1596 crtc_state->dpll_hw_state.pll9 = 5 << PORT_PLL_LOCK_THRESHOLD_SHIFT;
1597
1598 crtc_state->dpll_hw_state.pll10 =
1599 PORT_PLL_DCO_AMP(PORT_PLL_DCO_AMP_DEFAULT)
1600 | PORT_PLL_DCO_AMP_OVR_EN_H;
1601
1602 crtc_state->dpll_hw_state.ebb4 = PORT_PLL_10BIT_CLK_ENABLE;
1603
1604 crtc_state->dpll_hw_state.pcsdw12 =
1605 LANESTAGGER_STRAP_OVRD | lanestagger;
f9476a6c
ACO		 1606
1607 intel_dig_port = enc_to_dig_port(&encoder->base);
34177c24 1608
f9476a6c 1609 /* 1:1 mapping between ports and PLLs */
34177c24
ACO		 1610 i = (enum intel_dpll_id) intel_dig_port->port;
1611 pll = intel_get_shared_dpll_by_id(dev_priv, i);
1612
f9476a6c
ACO		 1613 DRM_DEBUG_KMS("CRTC:%d using pre-allocated %s\n",
1614 crtc->base.base.id, pll->name);
1615
1616 intel_reference_shared_dpll(pll, crtc_state);
1617
34177c24
ACO		 1618 /* shared DPLL id 0 is DPLL A */
1619 crtc_state->ddi_pll_sel = pll->id;
1620
f9476a6c
ACO		 1621 return pll;
1622}
1623
2edd6443
ACO		 1624static const struct intel_shared_dpll_funcs bxt_ddi_pll_funcs = {
1625 .enable = bxt_ddi_pll_enable,
1626 .disable = bxt_ddi_pll_disable,
1627 .get_hw_state = bxt_ddi_pll_get_hw_state,
1628};
55be2f08
ACO		 1629
1630static void intel_ddi_pll_init(struct drm_device *dev)
1631{
1632 struct drm_i915_private *dev_priv = dev->dev_private;
55be2f08 1633
9f7eb31a
VS		 1634 if (INTEL_GEN(dev_priv) < 9) {
1635 uint32_t val = I915_READ(LCPLL_CTL);
b2045352 1636
55be2f08
ACO		 1637 /*
1638 * The LCPLL register should be turned on by the BIOS. For now
1639 * let's just check its state and print errors in case
1640 * something is wrong. Don't even try to turn it on.
1641 */
1642
1643 if (val & LCPLL_CD_SOURCE_FCLK)
1644 DRM_ERROR("CDCLK source is not LCPLL\n");
1645
1646 if (val & LCPLL_PLL_DISABLE)
1647 DRM_ERROR("LCPLL is disabled\n");
1648 }
1649}
1650
2edd6443
ACO		 1651struct dpll_info {
1652 const char *name;
1653 const int id;
1654 const struct intel_shared_dpll_funcs *funcs;
9d16da65 1655 uint32_t flags;
2edd6443
ACO		 1656};
1657
f9476a6c
ACO		 1658struct intel_dpll_mgr {
1659 const struct dpll_info *dpll_info;
1660
1661 struct intel_shared_dpll *(*get_dpll)(struct intel_crtc *crtc,
daedf20a
ACO		 1662 struct intel_crtc_state *crtc_state,
1663 struct intel_encoder *encoder);
f9476a6c
ACO		 1664};
1665
2edd6443 1666static const struct dpll_info pch_plls[] = {
9d16da65
ACO		 1667 { "PCH DPLL A", DPLL_ID_PCH_PLL_A, &ibx_pch_dpll_funcs, 0 },
1668 { "PCH DPLL B", DPLL_ID_PCH_PLL_B, &ibx_pch_dpll_funcs, 0 },
1669 { NULL, -1, NULL, 0 },
2edd6443
ACO		 1670};
1671
f9476a6c
ACO		 1672static const struct intel_dpll_mgr pch_pll_mgr = {
1673 .dpll_info = pch_plls,
1674 .get_dpll = ibx_get_dpll,
1675};
1676
2edd6443 1677static const struct dpll_info hsw_plls[] = {
9d16da65
ACO		 1678 { "WRPLL 1", DPLL_ID_WRPLL1, &hsw_ddi_wrpll_funcs, 0 },
1679 { "WRPLL 2", DPLL_ID_WRPLL2, &hsw_ddi_wrpll_funcs, 0 },
1680 { "SPLL", DPLL_ID_SPLL, &hsw_ddi_spll_funcs, 0 },
1681 { "LCPLL 810", DPLL_ID_LCPLL_810, &hsw_ddi_lcpll_funcs, INTEL_DPLL_ALWAYS_ON },
1682 { "LCPLL 1350", DPLL_ID_LCPLL_1350, &hsw_ddi_lcpll_funcs, INTEL_DPLL_ALWAYS_ON },
1683 { "LCPLL 2700", DPLL_ID_LCPLL_2700, &hsw_ddi_lcpll_funcs, INTEL_DPLL_ALWAYS_ON },
2edd6443
ACO		 1684 { NULL, -1, NULL, },
1685};
1686
f9476a6c
ACO		 1687static const struct intel_dpll_mgr hsw_pll_mgr = {
1688 .dpll_info = hsw_plls,
1689 .get_dpll = hsw_get_dpll,
1690};
1691
2edd6443 1692static const struct dpll_info skl_plls[] = {
a3c988ea 1693 { "DPLL 0", DPLL_ID_SKL_DPLL0, &skl_ddi_dpll0_funcs, INTEL_DPLL_ALWAYS_ON },
d5aab9d4
VS		 1694 { "DPLL 1", DPLL_ID_SKL_DPLL1, &skl_ddi_pll_funcs, 0 },
1695 { "DPLL 2", DPLL_ID_SKL_DPLL2, &skl_ddi_pll_funcs, 0 },
1696 { "DPLL 3", DPLL_ID_SKL_DPLL3, &skl_ddi_pll_funcs, 0 },
2edd6443
ACO		 1697 { NULL, -1, NULL, },
1698};
1699
f9476a6c
ACO		 1700static const struct intel_dpll_mgr skl_pll_mgr = {
1701 .dpll_info = skl_plls,
1702 .get_dpll = skl_get_dpll,
1703};
1704
2edd6443 1705static const struct dpll_info bxt_plls[] = {
08250c4b
ID		 1706 { "PORT PLL A", DPLL_ID_SKL_DPLL0, &bxt_ddi_pll_funcs, 0 },
1707 { "PORT PLL B", DPLL_ID_SKL_DPLL1, &bxt_ddi_pll_funcs, 0 },
1708 { "PORT PLL C", DPLL_ID_SKL_DPLL2, &bxt_ddi_pll_funcs, 0 },
2edd6443
ACO		 1709 { NULL, -1, NULL, },
1710};
1711
f9476a6c
ACO		 1712static const struct intel_dpll_mgr bxt_pll_mgr = {
1713 .dpll_info = bxt_plls,
1714 .get_dpll = bxt_get_dpll,
1715};
1716
7abd4b35
ACO		 1717void intel_shared_dpll_init(struct drm_device *dev)
1718{
1719 struct drm_i915_private *dev_priv = dev->dev_private;
f9476a6c
ACO		 1720 const struct intel_dpll_mgr *dpll_mgr = NULL;
1721 const struct dpll_info *dpll_info;
2edd6443 1722 int i;
7abd4b35 1723
2edd6443 1724 if (IS_SKYLAKE(dev) || IS_KABYLAKE(dev))
f9476a6c 1725 dpll_mgr = &skl_pll_mgr;
08250c4b 1726 else if (IS_BROXTON(dev))
f9476a6c 1727 dpll_mgr = &bxt_pll_mgr;
2edd6443 1728 else if (HAS_DDI(dev))
f9476a6c 1729 dpll_mgr = &hsw_pll_mgr;
7abd4b35 1730 else if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev))
f9476a6c 1731 dpll_mgr = &pch_pll_mgr;
2edd6443 1732
f9476a6c 1733 if (!dpll_mgr) {
7abd4b35 1734 dev_priv->num_shared_dpll = 0;
2edd6443
ACO		 1735 return;
1736 }
1737
f9476a6c
ACO		 1738 dpll_info = dpll_mgr->dpll_info;
1739
2edd6443
ACO		 1740 for (i = 0; dpll_info[i].id >= 0; i++) {
1741 WARN_ON(i != dpll_info[i].id);
1742
1743 dev_priv->shared_dplls[i].id = dpll_info[i].id;
1744 dev_priv->shared_dplls[i].name = dpll_info[i].name;
1745 dev_priv->shared_dplls[i].funcs = *dpll_info[i].funcs;
9d16da65 1746 dev_priv->shared_dplls[i].flags = dpll_info[i].flags;
2edd6443
ACO		 1747 }
1748
f9476a6c 1749 dev_priv->dpll_mgr = dpll_mgr;
2edd6443 1750 dev_priv->num_shared_dpll = i;
fbf6d879 1751 mutex_init(&dev_priv->dpll_lock);
7abd4b35
ACO		 1752
1753 BUG_ON(dev_priv->num_shared_dpll > I915_NUM_PLLS);
2edd6443
ACO		 1754
1755 /* FIXME: Move this to a more suitable place */
1756 if (HAS_DDI(dev))
1757 intel_ddi_pll_init(dev);
7abd4b35 1758}
f9476a6c
ACO		 1759
1760struct intel_shared_dpll *
1761intel_get_shared_dpll(struct intel_crtc *crtc,
daedf20a
ACO		 1762 struct intel_crtc_state *crtc_state,
1763 struct intel_encoder *encoder)
f9476a6c
ACO		 1764{
1765 struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
1766 const struct intel_dpll_mgr *dpll_mgr = dev_priv->dpll_mgr;
1767
1768 if (WARN_ON(!dpll_mgr))
1769 return NULL;
1770
daedf20a 1771 return dpll_mgr->get_dpll(crtc, crtc_state, encoder);
f9476a6c 1772}
Linux kernel - Deliverables
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