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7ff89ca2 VS |
1 | /* |
2 | * Copyright © 2006-2017 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 | ||
26 | /** | |
27 | * DOC: CDCLK / RAWCLK | |
28 | * | |
29 | * The display engine uses several different clocks to do its work. There | |
30 | * are two main clocks involved that aren't directly related to the actual | |
31 | * pixel clock or any symbol/bit clock of the actual output port. These | |
32 | * are the core display clock (CDCLK) and RAWCLK. | |
33 | * | |
34 | * CDCLK clocks most of the display pipe logic, and thus its frequency | |
35 | * must be high enough to support the rate at which pixels are flowing | |
36 | * through the pipes. Downscaling must also be accounted as that increases | |
37 | * the effective pixel rate. | |
38 | * | |
39 | * On several platforms the CDCLK frequency can be changed dynamically | |
40 | * to minimize power consumption for a given display configuration. | |
41 | * Typically changes to the CDCLK frequency require all the display pipes | |
42 | * to be shut down while the frequency is being changed. | |
43 | * | |
44 | * On SKL+ the DMC will toggle the CDCLK off/on during DC5/6 entry/exit. | |
45 | * DMC will not change the active CDCLK frequency however, so that part | |
46 | * will still be performed by the driver directly. | |
47 | * | |
48 | * RAWCLK is a fixed frequency clock, often used by various auxiliary | |
49 | * blocks such as AUX CH or backlight PWM. Hence the only thing we | |
50 | * really need to know about RAWCLK is its frequency so that various | |
51 | * dividers can be programmed correctly. | |
52 | */ | |
53 | ||
49cd97a3 VS |
54 | static void fixed_133mhz_get_cdclk(struct drm_i915_private *dev_priv, |
55 | struct intel_cdclk_state *cdclk_state) | |
7ff89ca2 | 56 | { |
49cd97a3 | 57 | cdclk_state->cdclk = 133333; |
7ff89ca2 VS |
58 | } |
59 | ||
49cd97a3 VS |
60 | static void fixed_200mhz_get_cdclk(struct drm_i915_private *dev_priv, |
61 | struct intel_cdclk_state *cdclk_state) | |
7ff89ca2 | 62 | { |
49cd97a3 | 63 | cdclk_state->cdclk = 200000; |
7ff89ca2 VS |
64 | } |
65 | ||
49cd97a3 VS |
66 | static void fixed_266mhz_get_cdclk(struct drm_i915_private *dev_priv, |
67 | struct intel_cdclk_state *cdclk_state) | |
7ff89ca2 | 68 | { |
49cd97a3 | 69 | cdclk_state->cdclk = 266667; |
7ff89ca2 VS |
70 | } |
71 | ||
49cd97a3 VS |
72 | static void fixed_333mhz_get_cdclk(struct drm_i915_private *dev_priv, |
73 | struct intel_cdclk_state *cdclk_state) | |
7ff89ca2 | 74 | { |
49cd97a3 | 75 | cdclk_state->cdclk = 333333; |
7ff89ca2 VS |
76 | } |
77 | ||
49cd97a3 VS |
78 | static void fixed_400mhz_get_cdclk(struct drm_i915_private *dev_priv, |
79 | struct intel_cdclk_state *cdclk_state) | |
7ff89ca2 | 80 | { |
49cd97a3 | 81 | cdclk_state->cdclk = 400000; |
7ff89ca2 VS |
82 | } |
83 | ||
49cd97a3 VS |
84 | static void fixed_450mhz_get_cdclk(struct drm_i915_private *dev_priv, |
85 | struct intel_cdclk_state *cdclk_state) | |
7ff89ca2 | 86 | { |
49cd97a3 | 87 | cdclk_state->cdclk = 450000; |
7ff89ca2 VS |
88 | } |
89 | ||
49cd97a3 VS |
90 | static void i85x_get_cdclk(struct drm_i915_private *dev_priv, |
91 | struct intel_cdclk_state *cdclk_state) | |
7ff89ca2 VS |
92 | { |
93 | struct pci_dev *pdev = dev_priv->drm.pdev; | |
94 | u16 hpllcc = 0; | |
95 | ||
96 | /* | |
97 | * 852GM/852GMV only supports 133 MHz and the HPLLCC | |
98 | * encoding is different :( | |
99 | * FIXME is this the right way to detect 852GM/852GMV? | |
100 | */ | |
49cd97a3 VS |
101 | if (pdev->revision == 0x1) { |
102 | cdclk_state->cdclk = 133333; | |
103 | return; | |
104 | } | |
7ff89ca2 VS |
105 | |
106 | pci_bus_read_config_word(pdev->bus, | |
107 | PCI_DEVFN(0, 3), HPLLCC, &hpllcc); | |
108 | ||
109 | /* Assume that the hardware is in the high speed state. This | |
110 | * should be the default. | |
111 | */ | |
112 | switch (hpllcc & GC_CLOCK_CONTROL_MASK) { | |
113 | case GC_CLOCK_133_200: | |
114 | case GC_CLOCK_133_200_2: | |
115 | case GC_CLOCK_100_200: | |
49cd97a3 VS |
116 | cdclk_state->cdclk = 200000; |
117 | break; | |
7ff89ca2 | 118 | case GC_CLOCK_166_250: |
49cd97a3 VS |
119 | cdclk_state->cdclk = 250000; |
120 | break; | |
7ff89ca2 | 121 | case GC_CLOCK_100_133: |
49cd97a3 VS |
122 | cdclk_state->cdclk = 133333; |
123 | break; | |
7ff89ca2 VS |
124 | case GC_CLOCK_133_266: |
125 | case GC_CLOCK_133_266_2: | |
126 | case GC_CLOCK_166_266: | |
49cd97a3 VS |
127 | cdclk_state->cdclk = 266667; |
128 | break; | |
7ff89ca2 | 129 | } |
7ff89ca2 VS |
130 | } |
131 | ||
49cd97a3 VS |
132 | static void i915gm_get_cdclk(struct drm_i915_private *dev_priv, |
133 | struct intel_cdclk_state *cdclk_state) | |
7ff89ca2 VS |
134 | { |
135 | struct pci_dev *pdev = dev_priv->drm.pdev; | |
136 | u16 gcfgc = 0; | |
137 | ||
138 | pci_read_config_word(pdev, GCFGC, &gcfgc); | |
139 | ||
49cd97a3 VS |
140 | if (gcfgc & GC_LOW_FREQUENCY_ENABLE) { |
141 | cdclk_state->cdclk = 133333; | |
142 | return; | |
143 | } | |
7ff89ca2 VS |
144 | |
145 | switch (gcfgc & GC_DISPLAY_CLOCK_MASK) { | |
146 | case GC_DISPLAY_CLOCK_333_320_MHZ: | |
49cd97a3 VS |
147 | cdclk_state->cdclk = 333333; |
148 | break; | |
7ff89ca2 VS |
149 | default: |
150 | case GC_DISPLAY_CLOCK_190_200_MHZ: | |
49cd97a3 VS |
151 | cdclk_state->cdclk = 190000; |
152 | break; | |
7ff89ca2 VS |
153 | } |
154 | } | |
155 | ||
49cd97a3 VS |
156 | static void i945gm_get_cdclk(struct drm_i915_private *dev_priv, |
157 | struct intel_cdclk_state *cdclk_state) | |
7ff89ca2 VS |
158 | { |
159 | struct pci_dev *pdev = dev_priv->drm.pdev; | |
160 | u16 gcfgc = 0; | |
161 | ||
162 | pci_read_config_word(pdev, GCFGC, &gcfgc); | |
163 | ||
49cd97a3 VS |
164 | if (gcfgc & GC_LOW_FREQUENCY_ENABLE) { |
165 | cdclk_state->cdclk = 133333; | |
166 | return; | |
167 | } | |
7ff89ca2 VS |
168 | |
169 | switch (gcfgc & GC_DISPLAY_CLOCK_MASK) { | |
170 | case GC_DISPLAY_CLOCK_333_320_MHZ: | |
49cd97a3 VS |
171 | cdclk_state->cdclk = 320000; |
172 | break; | |
7ff89ca2 VS |
173 | default: |
174 | case GC_DISPLAY_CLOCK_190_200_MHZ: | |
49cd97a3 VS |
175 | cdclk_state->cdclk = 200000; |
176 | break; | |
7ff89ca2 VS |
177 | } |
178 | } | |
179 | ||
180 | static unsigned int intel_hpll_vco(struct drm_i915_private *dev_priv) | |
181 | { | |
182 | static const unsigned int blb_vco[8] = { | |
183 | [0] = 3200000, | |
184 | [1] = 4000000, | |
185 | [2] = 5333333, | |
186 | [3] = 4800000, | |
187 | [4] = 6400000, | |
188 | }; | |
189 | static const unsigned int pnv_vco[8] = { | |
190 | [0] = 3200000, | |
191 | [1] = 4000000, | |
192 | [2] = 5333333, | |
193 | [3] = 4800000, | |
194 | [4] = 2666667, | |
195 | }; | |
196 | static const unsigned int cl_vco[8] = { | |
197 | [0] = 3200000, | |
198 | [1] = 4000000, | |
199 | [2] = 5333333, | |
200 | [3] = 6400000, | |
201 | [4] = 3333333, | |
202 | [5] = 3566667, | |
203 | [6] = 4266667, | |
204 | }; | |
205 | static const unsigned int elk_vco[8] = { | |
206 | [0] = 3200000, | |
207 | [1] = 4000000, | |
208 | [2] = 5333333, | |
209 | [3] = 4800000, | |
210 | }; | |
211 | static const unsigned int ctg_vco[8] = { | |
212 | [0] = 3200000, | |
213 | [1] = 4000000, | |
214 | [2] = 5333333, | |
215 | [3] = 6400000, | |
216 | [4] = 2666667, | |
217 | [5] = 4266667, | |
218 | }; | |
219 | const unsigned int *vco_table; | |
220 | unsigned int vco; | |
221 | uint8_t tmp = 0; | |
222 | ||
223 | /* FIXME other chipsets? */ | |
224 | if (IS_GM45(dev_priv)) | |
225 | vco_table = ctg_vco; | |
6b9e441d | 226 | else if (IS_G45(dev_priv)) |
7ff89ca2 VS |
227 | vco_table = elk_vco; |
228 | else if (IS_I965GM(dev_priv)) | |
229 | vco_table = cl_vco; | |
230 | else if (IS_PINEVIEW(dev_priv)) | |
231 | vco_table = pnv_vco; | |
232 | else if (IS_G33(dev_priv)) | |
233 | vco_table = blb_vco; | |
234 | else | |
235 | return 0; | |
236 | ||
237 | tmp = I915_READ(IS_MOBILE(dev_priv) ? HPLLVCO_MOBILE : HPLLVCO); | |
238 | ||
239 | vco = vco_table[tmp & 0x7]; | |
240 | if (vco == 0) | |
241 | DRM_ERROR("Bad HPLL VCO (HPLLVCO=0x%02x)\n", tmp); | |
242 | else | |
243 | DRM_DEBUG_KMS("HPLL VCO %u kHz\n", vco); | |
244 | ||
245 | return vco; | |
246 | } | |
247 | ||
49cd97a3 VS |
248 | static void g33_get_cdclk(struct drm_i915_private *dev_priv, |
249 | struct intel_cdclk_state *cdclk_state) | |
7ff89ca2 VS |
250 | { |
251 | struct pci_dev *pdev = dev_priv->drm.pdev; | |
252 | static const uint8_t div_3200[] = { 12, 10, 8, 7, 5, 16 }; | |
253 | static const uint8_t div_4000[] = { 14, 12, 10, 8, 6, 20 }; | |
254 | static const uint8_t div_4800[] = { 20, 14, 12, 10, 8, 24 }; | |
255 | static const uint8_t div_5333[] = { 20, 16, 12, 12, 8, 28 }; | |
256 | const uint8_t *div_table; | |
49cd97a3 | 257 | unsigned int cdclk_sel; |
7ff89ca2 VS |
258 | uint16_t tmp = 0; |
259 | ||
49cd97a3 VS |
260 | cdclk_state->vco = intel_hpll_vco(dev_priv); |
261 | ||
7ff89ca2 VS |
262 | pci_read_config_word(pdev, GCFGC, &tmp); |
263 | ||
264 | cdclk_sel = (tmp >> 4) & 0x7; | |
265 | ||
266 | if (cdclk_sel >= ARRAY_SIZE(div_3200)) | |
267 | goto fail; | |
268 | ||
49cd97a3 | 269 | switch (cdclk_state->vco) { |
7ff89ca2 VS |
270 | case 3200000: |
271 | div_table = div_3200; | |
272 | break; | |
273 | case 4000000: | |
274 | div_table = div_4000; | |
275 | break; | |
276 | case 4800000: | |
277 | div_table = div_4800; | |
278 | break; | |
279 | case 5333333: | |
280 | div_table = div_5333; | |
281 | break; | |
282 | default: | |
283 | goto fail; | |
284 | } | |
285 | ||
49cd97a3 VS |
286 | cdclk_state->cdclk = DIV_ROUND_CLOSEST(cdclk_state->vco, |
287 | div_table[cdclk_sel]); | |
288 | return; | |
7ff89ca2 VS |
289 | |
290 | fail: | |
291 | DRM_ERROR("Unable to determine CDCLK. HPLL VCO=%u kHz, CFGC=0x%08x\n", | |
49cd97a3 VS |
292 | cdclk_state->vco, tmp); |
293 | cdclk_state->cdclk = 190476; | |
7ff89ca2 VS |
294 | } |
295 | ||
49cd97a3 VS |
296 | static void pnv_get_cdclk(struct drm_i915_private *dev_priv, |
297 | struct intel_cdclk_state *cdclk_state) | |
7ff89ca2 VS |
298 | { |
299 | struct pci_dev *pdev = dev_priv->drm.pdev; | |
300 | u16 gcfgc = 0; | |
301 | ||
302 | pci_read_config_word(pdev, GCFGC, &gcfgc); | |
303 | ||
304 | switch (gcfgc & GC_DISPLAY_CLOCK_MASK) { | |
305 | case GC_DISPLAY_CLOCK_267_MHZ_PNV: | |
49cd97a3 VS |
306 | cdclk_state->cdclk = 266667; |
307 | break; | |
7ff89ca2 | 308 | case GC_DISPLAY_CLOCK_333_MHZ_PNV: |
49cd97a3 VS |
309 | cdclk_state->cdclk = 333333; |
310 | break; | |
7ff89ca2 | 311 | case GC_DISPLAY_CLOCK_444_MHZ_PNV: |
49cd97a3 VS |
312 | cdclk_state->cdclk = 444444; |
313 | break; | |
7ff89ca2 | 314 | case GC_DISPLAY_CLOCK_200_MHZ_PNV: |
49cd97a3 VS |
315 | cdclk_state->cdclk = 200000; |
316 | break; | |
7ff89ca2 VS |
317 | default: |
318 | DRM_ERROR("Unknown pnv display core clock 0x%04x\n", gcfgc); | |
319 | case GC_DISPLAY_CLOCK_133_MHZ_PNV: | |
49cd97a3 VS |
320 | cdclk_state->cdclk = 133333; |
321 | break; | |
7ff89ca2 | 322 | case GC_DISPLAY_CLOCK_167_MHZ_PNV: |
49cd97a3 VS |
323 | cdclk_state->cdclk = 166667; |
324 | break; | |
7ff89ca2 VS |
325 | } |
326 | } | |
327 | ||
49cd97a3 VS |
328 | static void i965gm_get_cdclk(struct drm_i915_private *dev_priv, |
329 | struct intel_cdclk_state *cdclk_state) | |
7ff89ca2 VS |
330 | { |
331 | struct pci_dev *pdev = dev_priv->drm.pdev; | |
332 | static const uint8_t div_3200[] = { 16, 10, 8 }; | |
333 | static const uint8_t div_4000[] = { 20, 12, 10 }; | |
334 | static const uint8_t div_5333[] = { 24, 16, 14 }; | |
335 | const uint8_t *div_table; | |
49cd97a3 | 336 | unsigned int cdclk_sel; |
7ff89ca2 VS |
337 | uint16_t tmp = 0; |
338 | ||
49cd97a3 VS |
339 | cdclk_state->vco = intel_hpll_vco(dev_priv); |
340 | ||
7ff89ca2 VS |
341 | pci_read_config_word(pdev, GCFGC, &tmp); |
342 | ||
343 | cdclk_sel = ((tmp >> 8) & 0x1f) - 1; | |
344 | ||
345 | if (cdclk_sel >= ARRAY_SIZE(div_3200)) | |
346 | goto fail; | |
347 | ||
49cd97a3 | 348 | switch (cdclk_state->vco) { |
7ff89ca2 VS |
349 | case 3200000: |
350 | div_table = div_3200; | |
351 | break; | |
352 | case 4000000: | |
353 | div_table = div_4000; | |
354 | break; | |
355 | case 5333333: | |
356 | div_table = div_5333; | |
357 | break; | |
358 | default: | |
359 | goto fail; | |
360 | } | |
361 | ||
49cd97a3 VS |
362 | cdclk_state->cdclk = DIV_ROUND_CLOSEST(cdclk_state->vco, |
363 | div_table[cdclk_sel]); | |
364 | return; | |
7ff89ca2 VS |
365 | |
366 | fail: | |
367 | DRM_ERROR("Unable to determine CDCLK. HPLL VCO=%u kHz, CFGC=0x%04x\n", | |
49cd97a3 VS |
368 | cdclk_state->vco, tmp); |
369 | cdclk_state->cdclk = 200000; | |
7ff89ca2 VS |
370 | } |
371 | ||
49cd97a3 VS |
372 | static void gm45_get_cdclk(struct drm_i915_private *dev_priv, |
373 | struct intel_cdclk_state *cdclk_state) | |
7ff89ca2 VS |
374 | { |
375 | struct pci_dev *pdev = dev_priv->drm.pdev; | |
49cd97a3 | 376 | unsigned int cdclk_sel; |
7ff89ca2 VS |
377 | uint16_t tmp = 0; |
378 | ||
49cd97a3 VS |
379 | cdclk_state->vco = intel_hpll_vco(dev_priv); |
380 | ||
7ff89ca2 VS |
381 | pci_read_config_word(pdev, GCFGC, &tmp); |
382 | ||
383 | cdclk_sel = (tmp >> 12) & 0x1; | |
384 | ||
49cd97a3 | 385 | switch (cdclk_state->vco) { |
7ff89ca2 VS |
386 | case 2666667: |
387 | case 4000000: | |
388 | case 5333333: | |
49cd97a3 VS |
389 | cdclk_state->cdclk = cdclk_sel ? 333333 : 222222; |
390 | break; | |
7ff89ca2 | 391 | case 3200000: |
49cd97a3 VS |
392 | cdclk_state->cdclk = cdclk_sel ? 320000 : 228571; |
393 | break; | |
7ff89ca2 VS |
394 | default: |
395 | DRM_ERROR("Unable to determine CDCLK. HPLL VCO=%u, CFGC=0x%04x\n", | |
49cd97a3 VS |
396 | cdclk_state->vco, tmp); |
397 | cdclk_state->cdclk = 222222; | |
398 | break; | |
7ff89ca2 VS |
399 | } |
400 | } | |
401 | ||
49cd97a3 VS |
402 | static void hsw_get_cdclk(struct drm_i915_private *dev_priv, |
403 | struct intel_cdclk_state *cdclk_state) | |
7ff89ca2 VS |
404 | { |
405 | uint32_t lcpll = I915_READ(LCPLL_CTL); | |
406 | uint32_t freq = lcpll & LCPLL_CLK_FREQ_MASK; | |
407 | ||
408 | if (lcpll & LCPLL_CD_SOURCE_FCLK) | |
49cd97a3 | 409 | cdclk_state->cdclk = 800000; |
7ff89ca2 | 410 | else if (I915_READ(FUSE_STRAP) & HSW_CDCLK_LIMIT) |
49cd97a3 | 411 | cdclk_state->cdclk = 450000; |
7ff89ca2 | 412 | else if (freq == LCPLL_CLK_FREQ_450) |
49cd97a3 | 413 | cdclk_state->cdclk = 450000; |
7ff89ca2 | 414 | else if (IS_HSW_ULT(dev_priv)) |
49cd97a3 | 415 | cdclk_state->cdclk = 337500; |
7ff89ca2 | 416 | else |
49cd97a3 | 417 | cdclk_state->cdclk = 540000; |
7ff89ca2 VS |
418 | } |
419 | ||
d305e061 | 420 | static int vlv_calc_cdclk(struct drm_i915_private *dev_priv, int min_cdclk) |
7ff89ca2 VS |
421 | { |
422 | int freq_320 = (dev_priv->hpll_freq << 1) % 320000 != 0 ? | |
423 | 333333 : 320000; | |
7ff89ca2 VS |
424 | |
425 | /* | |
426 | * We seem to get an unstable or solid color picture at 200MHz. | |
427 | * Not sure what's wrong. For now use 200MHz only when all pipes | |
428 | * are off. | |
429 | */ | |
d305e061 | 430 | if (IS_VALLEYVIEW(dev_priv) && min_cdclk > freq_320) |
7ff89ca2 | 431 | return 400000; |
d305e061 | 432 | else if (min_cdclk > 266667) |
7ff89ca2 | 433 | return freq_320; |
d305e061 | 434 | else if (min_cdclk > 0) |
7ff89ca2 VS |
435 | return 266667; |
436 | else | |
437 | return 200000; | |
438 | } | |
439 | ||
999c5766 VS |
440 | static u8 vlv_calc_voltage_level(struct drm_i915_private *dev_priv, int cdclk) |
441 | { | |
442 | if (IS_VALLEYVIEW(dev_priv)) { | |
443 | if (cdclk >= 320000) /* jump to highest voltage for 400MHz too */ | |
444 | return 2; | |
445 | else if (cdclk >= 266667) | |
446 | return 1; | |
447 | else | |
448 | return 0; | |
449 | } else { | |
450 | /* | |
451 | * Specs are full of misinformation, but testing on actual | |
452 | * hardware has shown that we just need to write the desired | |
453 | * CCK divider into the Punit register. | |
454 | */ | |
455 | return DIV_ROUND_CLOSEST(dev_priv->hpll_freq << 1, cdclk) - 1; | |
456 | } | |
457 | } | |
458 | ||
49cd97a3 VS |
459 | static void vlv_get_cdclk(struct drm_i915_private *dev_priv, |
460 | struct intel_cdclk_state *cdclk_state) | |
7ff89ca2 | 461 | { |
999c5766 VS |
462 | u32 val; |
463 | ||
49cd97a3 VS |
464 | cdclk_state->vco = vlv_get_hpll_vco(dev_priv); |
465 | cdclk_state->cdclk = vlv_get_cck_clock(dev_priv, "cdclk", | |
466 | CCK_DISPLAY_CLOCK_CONTROL, | |
467 | cdclk_state->vco); | |
999c5766 VS |
468 | |
469 | mutex_lock(&dev_priv->pcu_lock); | |
470 | val = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ); | |
471 | mutex_unlock(&dev_priv->pcu_lock); | |
472 | ||
473 | if (IS_VALLEYVIEW(dev_priv)) | |
474 | cdclk_state->voltage_level = (val & DSPFREQGUAR_MASK) >> | |
475 | DSPFREQGUAR_SHIFT; | |
476 | else | |
477 | cdclk_state->voltage_level = (val & DSPFREQGUAR_MASK_CHV) >> | |
478 | DSPFREQGUAR_SHIFT_CHV; | |
7ff89ca2 VS |
479 | } |
480 | ||
481 | static void vlv_program_pfi_credits(struct drm_i915_private *dev_priv) | |
482 | { | |
483 | unsigned int credits, default_credits; | |
484 | ||
485 | if (IS_CHERRYVIEW(dev_priv)) | |
486 | default_credits = PFI_CREDIT(12); | |
487 | else | |
488 | default_credits = PFI_CREDIT(8); | |
489 | ||
49cd97a3 | 490 | if (dev_priv->cdclk.hw.cdclk >= dev_priv->czclk_freq) { |
7ff89ca2 VS |
491 | /* CHV suggested value is 31 or 63 */ |
492 | if (IS_CHERRYVIEW(dev_priv)) | |
493 | credits = PFI_CREDIT_63; | |
494 | else | |
495 | credits = PFI_CREDIT(15); | |
496 | } else { | |
497 | credits = default_credits; | |
498 | } | |
499 | ||
500 | /* | |
501 | * WA - write default credits before re-programming | |
502 | * FIXME: should we also set the resend bit here? | |
503 | */ | |
504 | I915_WRITE(GCI_CONTROL, VGA_FAST_MODE_DISABLE | | |
505 | default_credits); | |
506 | ||
507 | I915_WRITE(GCI_CONTROL, VGA_FAST_MODE_DISABLE | | |
508 | credits | PFI_CREDIT_RESEND); | |
509 | ||
510 | /* | |
511 | * FIXME is this guaranteed to clear | |
512 | * immediately or should we poll for it? | |
513 | */ | |
514 | WARN_ON(I915_READ(GCI_CONTROL) & PFI_CREDIT_RESEND); | |
515 | } | |
516 | ||
83c5fda7 VS |
517 | static void vlv_set_cdclk(struct drm_i915_private *dev_priv, |
518 | const struct intel_cdclk_state *cdclk_state) | |
7ff89ca2 | 519 | { |
83c5fda7 | 520 | int cdclk = cdclk_state->cdclk; |
999c5766 | 521 | u32 val, cmd = cdclk_state->voltage_level; |
7ff89ca2 | 522 | |
886015a0 GKB |
523 | /* There are cases where we can end up here with power domains |
524 | * off and a CDCLK frequency other than the minimum, like when | |
525 | * issuing a modeset without actually changing any display after | |
526 | * a system suspend. So grab the PIPE-A domain, which covers | |
527 | * the HW blocks needed for the following programming. | |
528 | */ | |
529 | intel_display_power_get(dev_priv, POWER_DOMAIN_PIPE_A); | |
530 | ||
9f817501 | 531 | mutex_lock(&dev_priv->pcu_lock); |
7ff89ca2 VS |
532 | val = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ); |
533 | val &= ~DSPFREQGUAR_MASK; | |
534 | val |= (cmd << DSPFREQGUAR_SHIFT); | |
535 | vlv_punit_write(dev_priv, PUNIT_REG_DSPFREQ, val); | |
536 | if (wait_for((vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) & | |
537 | DSPFREQSTAT_MASK) == (cmd << DSPFREQSTAT_SHIFT), | |
538 | 50)) { | |
539 | DRM_ERROR("timed out waiting for CDclk change\n"); | |
540 | } | |
9f817501 | 541 | mutex_unlock(&dev_priv->pcu_lock); |
7ff89ca2 VS |
542 | |
543 | mutex_lock(&dev_priv->sb_lock); | |
544 | ||
545 | if (cdclk == 400000) { | |
546 | u32 divider; | |
547 | ||
548 | divider = DIV_ROUND_CLOSEST(dev_priv->hpll_freq << 1, | |
549 | cdclk) - 1; | |
550 | ||
551 | /* adjust cdclk divider */ | |
552 | val = vlv_cck_read(dev_priv, CCK_DISPLAY_CLOCK_CONTROL); | |
553 | val &= ~CCK_FREQUENCY_VALUES; | |
554 | val |= divider; | |
555 | vlv_cck_write(dev_priv, CCK_DISPLAY_CLOCK_CONTROL, val); | |
556 | ||
557 | if (wait_for((vlv_cck_read(dev_priv, CCK_DISPLAY_CLOCK_CONTROL) & | |
558 | CCK_FREQUENCY_STATUS) == (divider << CCK_FREQUENCY_STATUS_SHIFT), | |
559 | 50)) | |
560 | DRM_ERROR("timed out waiting for CDclk change\n"); | |
561 | } | |
562 | ||
563 | /* adjust self-refresh exit latency value */ | |
564 | val = vlv_bunit_read(dev_priv, BUNIT_REG_BISOC); | |
565 | val &= ~0x7f; | |
566 | ||
567 | /* | |
568 | * For high bandwidth configs, we set a higher latency in the bunit | |
569 | * so that the core display fetch happens in time to avoid underruns. | |
570 | */ | |
571 | if (cdclk == 400000) | |
572 | val |= 4500 / 250; /* 4.5 usec */ | |
573 | else | |
574 | val |= 3000 / 250; /* 3.0 usec */ | |
575 | vlv_bunit_write(dev_priv, BUNIT_REG_BISOC, val); | |
576 | ||
577 | mutex_unlock(&dev_priv->sb_lock); | |
578 | ||
579 | intel_update_cdclk(dev_priv); | |
1a5301a5 VS |
580 | |
581 | vlv_program_pfi_credits(dev_priv); | |
886015a0 GKB |
582 | |
583 | intel_display_power_put(dev_priv, POWER_DOMAIN_PIPE_A); | |
7ff89ca2 VS |
584 | } |
585 | ||
83c5fda7 VS |
586 | static void chv_set_cdclk(struct drm_i915_private *dev_priv, |
587 | const struct intel_cdclk_state *cdclk_state) | |
7ff89ca2 | 588 | { |
83c5fda7 | 589 | int cdclk = cdclk_state->cdclk; |
999c5766 | 590 | u32 val, cmd = cdclk_state->voltage_level; |
7ff89ca2 | 591 | |
7ff89ca2 VS |
592 | switch (cdclk) { |
593 | case 333333: | |
594 | case 320000: | |
595 | case 266667: | |
596 | case 200000: | |
597 | break; | |
598 | default: | |
599 | MISSING_CASE(cdclk); | |
600 | return; | |
601 | } | |
602 | ||
886015a0 GKB |
603 | /* There are cases where we can end up here with power domains |
604 | * off and a CDCLK frequency other than the minimum, like when | |
605 | * issuing a modeset without actually changing any display after | |
606 | * a system suspend. So grab the PIPE-A domain, which covers | |
607 | * the HW blocks needed for the following programming. | |
608 | */ | |
609 | intel_display_power_get(dev_priv, POWER_DOMAIN_PIPE_A); | |
610 | ||
9f817501 | 611 | mutex_lock(&dev_priv->pcu_lock); |
7ff89ca2 VS |
612 | val = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ); |
613 | val &= ~DSPFREQGUAR_MASK_CHV; | |
614 | val |= (cmd << DSPFREQGUAR_SHIFT_CHV); | |
615 | vlv_punit_write(dev_priv, PUNIT_REG_DSPFREQ, val); | |
616 | if (wait_for((vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) & | |
617 | DSPFREQSTAT_MASK_CHV) == (cmd << DSPFREQSTAT_SHIFT_CHV), | |
618 | 50)) { | |
619 | DRM_ERROR("timed out waiting for CDclk change\n"); | |
620 | } | |
9f817501 | 621 | mutex_unlock(&dev_priv->pcu_lock); |
7ff89ca2 VS |
622 | |
623 | intel_update_cdclk(dev_priv); | |
1a5301a5 VS |
624 | |
625 | vlv_program_pfi_credits(dev_priv); | |
886015a0 GKB |
626 | |
627 | intel_display_power_put(dev_priv, POWER_DOMAIN_PIPE_A); | |
7ff89ca2 VS |
628 | } |
629 | ||
d305e061 | 630 | static int bdw_calc_cdclk(int min_cdclk) |
7ff89ca2 | 631 | { |
d305e061 | 632 | if (min_cdclk > 540000) |
7ff89ca2 | 633 | return 675000; |
d305e061 | 634 | else if (min_cdclk > 450000) |
7ff89ca2 | 635 | return 540000; |
d305e061 | 636 | else if (min_cdclk > 337500) |
7ff89ca2 VS |
637 | return 450000; |
638 | else | |
639 | return 337500; | |
640 | } | |
641 | ||
d7ffaeef VS |
642 | static u8 bdw_calc_voltage_level(int cdclk) |
643 | { | |
644 | switch (cdclk) { | |
645 | default: | |
646 | case 337500: | |
647 | return 2; | |
648 | case 450000: | |
649 | return 0; | |
650 | case 540000: | |
651 | return 1; | |
652 | case 675000: | |
653 | return 3; | |
654 | } | |
655 | } | |
656 | ||
49cd97a3 VS |
657 | static void bdw_get_cdclk(struct drm_i915_private *dev_priv, |
658 | struct intel_cdclk_state *cdclk_state) | |
7ff89ca2 VS |
659 | { |
660 | uint32_t lcpll = I915_READ(LCPLL_CTL); | |
661 | uint32_t freq = lcpll & LCPLL_CLK_FREQ_MASK; | |
662 | ||
663 | if (lcpll & LCPLL_CD_SOURCE_FCLK) | |
49cd97a3 | 664 | cdclk_state->cdclk = 800000; |
7ff89ca2 | 665 | else if (I915_READ(FUSE_STRAP) & HSW_CDCLK_LIMIT) |
49cd97a3 | 666 | cdclk_state->cdclk = 450000; |
7ff89ca2 | 667 | else if (freq == LCPLL_CLK_FREQ_450) |
49cd97a3 | 668 | cdclk_state->cdclk = 450000; |
7ff89ca2 | 669 | else if (freq == LCPLL_CLK_FREQ_54O_BDW) |
49cd97a3 | 670 | cdclk_state->cdclk = 540000; |
7ff89ca2 | 671 | else if (freq == LCPLL_CLK_FREQ_337_5_BDW) |
49cd97a3 | 672 | cdclk_state->cdclk = 337500; |
7ff89ca2 | 673 | else |
49cd97a3 | 674 | cdclk_state->cdclk = 675000; |
d7ffaeef VS |
675 | |
676 | /* | |
677 | * Can't read this out :( Let's assume it's | |
678 | * at least what the CDCLK frequency requires. | |
679 | */ | |
680 | cdclk_state->voltage_level = | |
681 | bdw_calc_voltage_level(cdclk_state->cdclk); | |
7ff89ca2 VS |
682 | } |
683 | ||
83c5fda7 VS |
684 | static void bdw_set_cdclk(struct drm_i915_private *dev_priv, |
685 | const struct intel_cdclk_state *cdclk_state) | |
7ff89ca2 | 686 | { |
83c5fda7 | 687 | int cdclk = cdclk_state->cdclk; |
d7ffaeef | 688 | uint32_t val; |
7ff89ca2 VS |
689 | int ret; |
690 | ||
691 | if (WARN((I915_READ(LCPLL_CTL) & | |
692 | (LCPLL_PLL_DISABLE | LCPLL_PLL_LOCK | | |
693 | LCPLL_CD_CLOCK_DISABLE | LCPLL_ROOT_CD_CLOCK_DISABLE | | |
694 | LCPLL_CD2X_CLOCK_DISABLE | LCPLL_POWER_DOWN_ALLOW | | |
695 | LCPLL_CD_SOURCE_FCLK)) != LCPLL_PLL_LOCK, | |
696 | "trying to change cdclk frequency with cdclk not enabled\n")) | |
697 | return; | |
698 | ||
9f817501 | 699 | mutex_lock(&dev_priv->pcu_lock); |
7ff89ca2 VS |
700 | ret = sandybridge_pcode_write(dev_priv, |
701 | BDW_PCODE_DISPLAY_FREQ_CHANGE_REQ, 0x0); | |
9f817501 | 702 | mutex_unlock(&dev_priv->pcu_lock); |
7ff89ca2 VS |
703 | if (ret) { |
704 | DRM_ERROR("failed to inform pcode about cdclk change\n"); | |
705 | return; | |
706 | } | |
707 | ||
708 | val = I915_READ(LCPLL_CTL); | |
709 | val |= LCPLL_CD_SOURCE_FCLK; | |
710 | I915_WRITE(LCPLL_CTL, val); | |
711 | ||
3164888a ML |
712 | /* |
713 | * According to the spec, it should be enough to poll for this 1 us. | |
714 | * However, extensive testing shows that this can take longer. | |
715 | */ | |
7ff89ca2 | 716 | if (wait_for_us(I915_READ(LCPLL_CTL) & |
3164888a | 717 | LCPLL_CD_SOURCE_FCLK_DONE, 100)) |
7ff89ca2 VS |
718 | DRM_ERROR("Switching to FCLK failed\n"); |
719 | ||
720 | val = I915_READ(LCPLL_CTL); | |
721 | val &= ~LCPLL_CLK_FREQ_MASK; | |
722 | ||
723 | switch (cdclk) { | |
2b58417f VS |
724 | default: |
725 | MISSING_CASE(cdclk); | |
726 | /* fall through */ | |
727 | case 337500: | |
728 | val |= LCPLL_CLK_FREQ_337_5_BDW; | |
2b58417f | 729 | break; |
7ff89ca2 VS |
730 | case 450000: |
731 | val |= LCPLL_CLK_FREQ_450; | |
7ff89ca2 VS |
732 | break; |
733 | case 540000: | |
734 | val |= LCPLL_CLK_FREQ_54O_BDW; | |
7ff89ca2 | 735 | break; |
7ff89ca2 VS |
736 | case 675000: |
737 | val |= LCPLL_CLK_FREQ_675_BDW; | |
7ff89ca2 | 738 | break; |
7ff89ca2 VS |
739 | } |
740 | ||
741 | I915_WRITE(LCPLL_CTL, val); | |
742 | ||
743 | val = I915_READ(LCPLL_CTL); | |
744 | val &= ~LCPLL_CD_SOURCE_FCLK; | |
745 | I915_WRITE(LCPLL_CTL, val); | |
746 | ||
747 | if (wait_for_us((I915_READ(LCPLL_CTL) & | |
748 | LCPLL_CD_SOURCE_FCLK_DONE) == 0, 1)) | |
749 | DRM_ERROR("Switching back to LCPLL failed\n"); | |
750 | ||
9f817501 | 751 | mutex_lock(&dev_priv->pcu_lock); |
d7ffaeef VS |
752 | sandybridge_pcode_write(dev_priv, HSW_PCODE_DE_WRITE_FREQ_REQ, |
753 | cdclk_state->voltage_level); | |
9f817501 | 754 | mutex_unlock(&dev_priv->pcu_lock); |
7ff89ca2 VS |
755 | |
756 | I915_WRITE(CDCLK_FREQ, DIV_ROUND_CLOSEST(cdclk, 1000) - 1); | |
757 | ||
758 | intel_update_cdclk(dev_priv); | |
759 | ||
49cd97a3 | 760 | WARN(cdclk != dev_priv->cdclk.hw.cdclk, |
7ff89ca2 | 761 | "cdclk requested %d kHz but got %d kHz\n", |
49cd97a3 | 762 | cdclk, dev_priv->cdclk.hw.cdclk); |
7ff89ca2 VS |
763 | } |
764 | ||
d305e061 | 765 | static int skl_calc_cdclk(int min_cdclk, int vco) |
7ff89ca2 VS |
766 | { |
767 | if (vco == 8640000) { | |
d305e061 | 768 | if (min_cdclk > 540000) |
7ff89ca2 | 769 | return 617143; |
d305e061 | 770 | else if (min_cdclk > 432000) |
7ff89ca2 | 771 | return 540000; |
d305e061 | 772 | else if (min_cdclk > 308571) |
7ff89ca2 VS |
773 | return 432000; |
774 | else | |
775 | return 308571; | |
776 | } else { | |
d305e061 | 777 | if (min_cdclk > 540000) |
7ff89ca2 | 778 | return 675000; |
d305e061 | 779 | else if (min_cdclk > 450000) |
7ff89ca2 | 780 | return 540000; |
d305e061 | 781 | else if (min_cdclk > 337500) |
7ff89ca2 VS |
782 | return 450000; |
783 | else | |
784 | return 337500; | |
785 | } | |
786 | } | |
787 | ||
2aa97491 VS |
788 | static u8 skl_calc_voltage_level(int cdclk) |
789 | { | |
790 | switch (cdclk) { | |
791 | default: | |
792 | case 308571: | |
793 | case 337500: | |
794 | return 0; | |
795 | case 450000: | |
796 | case 432000: | |
797 | return 1; | |
798 | case 540000: | |
799 | return 2; | |
800 | case 617143: | |
801 | case 675000: | |
802 | return 3; | |
803 | } | |
804 | } | |
805 | ||
49cd97a3 VS |
806 | static void skl_dpll0_update(struct drm_i915_private *dev_priv, |
807 | struct intel_cdclk_state *cdclk_state) | |
7ff89ca2 VS |
808 | { |
809 | u32 val; | |
810 | ||
49cd97a3 VS |
811 | cdclk_state->ref = 24000; |
812 | cdclk_state->vco = 0; | |
7ff89ca2 VS |
813 | |
814 | val = I915_READ(LCPLL1_CTL); | |
815 | if ((val & LCPLL_PLL_ENABLE) == 0) | |
816 | return; | |
817 | ||
818 | if (WARN_ON((val & LCPLL_PLL_LOCK) == 0)) | |
819 | return; | |
820 | ||
821 | val = I915_READ(DPLL_CTRL1); | |
822 | ||
823 | if (WARN_ON((val & (DPLL_CTRL1_HDMI_MODE(SKL_DPLL0) | | |
824 | DPLL_CTRL1_SSC(SKL_DPLL0) | | |
825 | DPLL_CTRL1_OVERRIDE(SKL_DPLL0))) != | |
826 | DPLL_CTRL1_OVERRIDE(SKL_DPLL0))) | |
827 | return; | |
828 | ||
829 | switch (val & DPLL_CTRL1_LINK_RATE_MASK(SKL_DPLL0)) { | |
830 | case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_810, SKL_DPLL0): | |
831 | case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1350, SKL_DPLL0): | |
832 | case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1620, SKL_DPLL0): | |
833 | case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_2700, SKL_DPLL0): | |
49cd97a3 | 834 | cdclk_state->vco = 8100000; |
7ff89ca2 VS |
835 | break; |
836 | case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1080, SKL_DPLL0): | |
837 | case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_2160, SKL_DPLL0): | |
49cd97a3 | 838 | cdclk_state->vco = 8640000; |
7ff89ca2 VS |
839 | break; |
840 | default: | |
841 | MISSING_CASE(val & DPLL_CTRL1_LINK_RATE_MASK(SKL_DPLL0)); | |
842 | break; | |
843 | } | |
844 | } | |
845 | ||
49cd97a3 VS |
846 | static void skl_get_cdclk(struct drm_i915_private *dev_priv, |
847 | struct intel_cdclk_state *cdclk_state) | |
7ff89ca2 VS |
848 | { |
849 | u32 cdctl; | |
850 | ||
49cd97a3 | 851 | skl_dpll0_update(dev_priv, cdclk_state); |
7ff89ca2 | 852 | |
49cd97a3 VS |
853 | cdclk_state->cdclk = cdclk_state->ref; |
854 | ||
855 | if (cdclk_state->vco == 0) | |
2aa97491 | 856 | goto out; |
7ff89ca2 VS |
857 | |
858 | cdctl = I915_READ(CDCLK_CTL); | |
859 | ||
49cd97a3 | 860 | if (cdclk_state->vco == 8640000) { |
7ff89ca2 VS |
861 | switch (cdctl & CDCLK_FREQ_SEL_MASK) { |
862 | case CDCLK_FREQ_450_432: | |
49cd97a3 VS |
863 | cdclk_state->cdclk = 432000; |
864 | break; | |
7ff89ca2 | 865 | case CDCLK_FREQ_337_308: |
49cd97a3 VS |
866 | cdclk_state->cdclk = 308571; |
867 | break; | |
7ff89ca2 | 868 | case CDCLK_FREQ_540: |
49cd97a3 VS |
869 | cdclk_state->cdclk = 540000; |
870 | break; | |
7ff89ca2 | 871 | case CDCLK_FREQ_675_617: |
49cd97a3 VS |
872 | cdclk_state->cdclk = 617143; |
873 | break; | |
7ff89ca2 VS |
874 | default: |
875 | MISSING_CASE(cdctl & CDCLK_FREQ_SEL_MASK); | |
49cd97a3 | 876 | break; |
7ff89ca2 VS |
877 | } |
878 | } else { | |
879 | switch (cdctl & CDCLK_FREQ_SEL_MASK) { | |
880 | case CDCLK_FREQ_450_432: | |
49cd97a3 VS |
881 | cdclk_state->cdclk = 450000; |
882 | break; | |
7ff89ca2 | 883 | case CDCLK_FREQ_337_308: |
49cd97a3 VS |
884 | cdclk_state->cdclk = 337500; |
885 | break; | |
7ff89ca2 | 886 | case CDCLK_FREQ_540: |
49cd97a3 VS |
887 | cdclk_state->cdclk = 540000; |
888 | break; | |
7ff89ca2 | 889 | case CDCLK_FREQ_675_617: |
49cd97a3 VS |
890 | cdclk_state->cdclk = 675000; |
891 | break; | |
7ff89ca2 VS |
892 | default: |
893 | MISSING_CASE(cdctl & CDCLK_FREQ_SEL_MASK); | |
49cd97a3 | 894 | break; |
7ff89ca2 VS |
895 | } |
896 | } | |
2aa97491 VS |
897 | |
898 | out: | |
899 | /* | |
900 | * Can't read this out :( Let's assume it's | |
901 | * at least what the CDCLK frequency requires. | |
902 | */ | |
903 | cdclk_state->voltage_level = | |
904 | skl_calc_voltage_level(cdclk_state->cdclk); | |
7ff89ca2 VS |
905 | } |
906 | ||
907 | /* convert from kHz to .1 fixpoint MHz with -1MHz offset */ | |
908 | static int skl_cdclk_decimal(int cdclk) | |
909 | { | |
910 | return DIV_ROUND_CLOSEST(cdclk - 1000, 500); | |
911 | } | |
912 | ||
913 | static void skl_set_preferred_cdclk_vco(struct drm_i915_private *dev_priv, | |
914 | int vco) | |
915 | { | |
916 | bool changed = dev_priv->skl_preferred_vco_freq != vco; | |
917 | ||
918 | dev_priv->skl_preferred_vco_freq = vco; | |
919 | ||
920 | if (changed) | |
921 | intel_update_max_cdclk(dev_priv); | |
922 | } | |
923 | ||
924 | static void skl_dpll0_enable(struct drm_i915_private *dev_priv, int vco) | |
925 | { | |
926 | int min_cdclk = skl_calc_cdclk(0, vco); | |
927 | u32 val; | |
928 | ||
929 | WARN_ON(vco != 8100000 && vco != 8640000); | |
930 | ||
931 | /* select the minimum CDCLK before enabling DPLL 0 */ | |
932 | val = CDCLK_FREQ_337_308 | skl_cdclk_decimal(min_cdclk); | |
933 | I915_WRITE(CDCLK_CTL, val); | |
934 | POSTING_READ(CDCLK_CTL); | |
935 | ||
936 | /* | |
937 | * We always enable DPLL0 with the lowest link rate possible, but still | |
938 | * taking into account the VCO required to operate the eDP panel at the | |
939 | * desired frequency. The usual DP link rates operate with a VCO of | |
940 | * 8100 while the eDP 1.4 alternate link rates need a VCO of 8640. | |
941 | * The modeset code is responsible for the selection of the exact link | |
942 | * rate later on, with the constraint of choosing a frequency that | |
943 | * works with vco. | |
944 | */ | |
945 | val = I915_READ(DPLL_CTRL1); | |
946 | ||
947 | val &= ~(DPLL_CTRL1_HDMI_MODE(SKL_DPLL0) | DPLL_CTRL1_SSC(SKL_DPLL0) | | |
948 | DPLL_CTRL1_LINK_RATE_MASK(SKL_DPLL0)); | |
949 | val |= DPLL_CTRL1_OVERRIDE(SKL_DPLL0); | |
950 | if (vco == 8640000) | |
951 | val |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1080, | |
952 | SKL_DPLL0); | |
953 | else | |
954 | val |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_810, | |
955 | SKL_DPLL0); | |
956 | ||
957 | I915_WRITE(DPLL_CTRL1, val); | |
958 | POSTING_READ(DPLL_CTRL1); | |
959 | ||
960 | I915_WRITE(LCPLL1_CTL, I915_READ(LCPLL1_CTL) | LCPLL_PLL_ENABLE); | |
961 | ||
962 | if (intel_wait_for_register(dev_priv, | |
963 | LCPLL1_CTL, LCPLL_PLL_LOCK, LCPLL_PLL_LOCK, | |
964 | 5)) | |
965 | DRM_ERROR("DPLL0 not locked\n"); | |
966 | ||
49cd97a3 | 967 | dev_priv->cdclk.hw.vco = vco; |
7ff89ca2 VS |
968 | |
969 | /* We'll want to keep using the current vco from now on. */ | |
970 | skl_set_preferred_cdclk_vco(dev_priv, vco); | |
971 | } | |
972 | ||
973 | static void skl_dpll0_disable(struct drm_i915_private *dev_priv) | |
974 | { | |
975 | I915_WRITE(LCPLL1_CTL, I915_READ(LCPLL1_CTL) & ~LCPLL_PLL_ENABLE); | |
976 | if (intel_wait_for_register(dev_priv, | |
977 | LCPLL1_CTL, LCPLL_PLL_LOCK, 0, | |
978 | 1)) | |
979 | DRM_ERROR("Couldn't disable DPLL0\n"); | |
980 | ||
49cd97a3 | 981 | dev_priv->cdclk.hw.vco = 0; |
7ff89ca2 VS |
982 | } |
983 | ||
984 | static void skl_set_cdclk(struct drm_i915_private *dev_priv, | |
83c5fda7 | 985 | const struct intel_cdclk_state *cdclk_state) |
7ff89ca2 | 986 | { |
83c5fda7 VS |
987 | int cdclk = cdclk_state->cdclk; |
988 | int vco = cdclk_state->vco; | |
2aa97491 | 989 | u32 freq_select; |
7ff89ca2 VS |
990 | int ret; |
991 | ||
9f817501 | 992 | mutex_lock(&dev_priv->pcu_lock); |
7ff89ca2 VS |
993 | ret = skl_pcode_request(dev_priv, SKL_PCODE_CDCLK_CONTROL, |
994 | SKL_CDCLK_PREPARE_FOR_CHANGE, | |
995 | SKL_CDCLK_READY_FOR_CHANGE, | |
996 | SKL_CDCLK_READY_FOR_CHANGE, 3); | |
9f817501 | 997 | mutex_unlock(&dev_priv->pcu_lock); |
7ff89ca2 VS |
998 | if (ret) { |
999 | DRM_ERROR("Failed to inform PCU about cdclk change (%d)\n", | |
1000 | ret); | |
1001 | return; | |
1002 | } | |
1003 | ||
1004 | /* set CDCLK_CTL */ | |
1005 | switch (cdclk) { | |
2b58417f VS |
1006 | default: |
1007 | WARN_ON(cdclk != dev_priv->cdclk.hw.ref); | |
1008 | WARN_ON(vco != 0); | |
1009 | /* fall through */ | |
1010 | case 308571: | |
1011 | case 337500: | |
1012 | freq_select = CDCLK_FREQ_337_308; | |
2b58417f | 1013 | break; |
7ff89ca2 VS |
1014 | case 450000: |
1015 | case 432000: | |
1016 | freq_select = CDCLK_FREQ_450_432; | |
7ff89ca2 VS |
1017 | break; |
1018 | case 540000: | |
1019 | freq_select = CDCLK_FREQ_540; | |
7ff89ca2 | 1020 | break; |
7ff89ca2 VS |
1021 | case 617143: |
1022 | case 675000: | |
1023 | freq_select = CDCLK_FREQ_675_617; | |
7ff89ca2 VS |
1024 | break; |
1025 | } | |
1026 | ||
49cd97a3 VS |
1027 | if (dev_priv->cdclk.hw.vco != 0 && |
1028 | dev_priv->cdclk.hw.vco != vco) | |
7ff89ca2 VS |
1029 | skl_dpll0_disable(dev_priv); |
1030 | ||
49cd97a3 | 1031 | if (dev_priv->cdclk.hw.vco != vco) |
7ff89ca2 VS |
1032 | skl_dpll0_enable(dev_priv, vco); |
1033 | ||
1034 | I915_WRITE(CDCLK_CTL, freq_select | skl_cdclk_decimal(cdclk)); | |
1035 | POSTING_READ(CDCLK_CTL); | |
1036 | ||
1037 | /* inform PCU of the change */ | |
9f817501 | 1038 | mutex_lock(&dev_priv->pcu_lock); |
2aa97491 VS |
1039 | sandybridge_pcode_write(dev_priv, SKL_PCODE_CDCLK_CONTROL, |
1040 | cdclk_state->voltage_level); | |
9f817501 | 1041 | mutex_unlock(&dev_priv->pcu_lock); |
7ff89ca2 VS |
1042 | |
1043 | intel_update_cdclk(dev_priv); | |
1044 | } | |
1045 | ||
1046 | static void skl_sanitize_cdclk(struct drm_i915_private *dev_priv) | |
1047 | { | |
1048 | uint32_t cdctl, expected; | |
1049 | ||
1050 | /* | |
1051 | * check if the pre-os initialized the display | |
1052 | * There is SWF18 scratchpad register defined which is set by the | |
1053 | * pre-os which can be used by the OS drivers to check the status | |
1054 | */ | |
1055 | if ((I915_READ(SWF_ILK(0x18)) & 0x00FFFFFF) == 0) | |
1056 | goto sanitize; | |
1057 | ||
1058 | intel_update_cdclk(dev_priv); | |
1059 | /* Is PLL enabled and locked ? */ | |
49cd97a3 VS |
1060 | if (dev_priv->cdclk.hw.vco == 0 || |
1061 | dev_priv->cdclk.hw.cdclk == dev_priv->cdclk.hw.ref) | |
7ff89ca2 VS |
1062 | goto sanitize; |
1063 | ||
1064 | /* DPLL okay; verify the cdclock | |
1065 | * | |
1066 | * Noticed in some instances that the freq selection is correct but | |
1067 | * decimal part is programmed wrong from BIOS where pre-os does not | |
1068 | * enable display. Verify the same as well. | |
1069 | */ | |
1070 | cdctl = I915_READ(CDCLK_CTL); | |
1071 | expected = (cdctl & CDCLK_FREQ_SEL_MASK) | | |
49cd97a3 | 1072 | skl_cdclk_decimal(dev_priv->cdclk.hw.cdclk); |
7ff89ca2 VS |
1073 | if (cdctl == expected) |
1074 | /* All well; nothing to sanitize */ | |
1075 | return; | |
1076 | ||
1077 | sanitize: | |
1078 | DRM_DEBUG_KMS("Sanitizing cdclk programmed by pre-os\n"); | |
1079 | ||
1080 | /* force cdclk programming */ | |
49cd97a3 | 1081 | dev_priv->cdclk.hw.cdclk = 0; |
7ff89ca2 | 1082 | /* force full PLL disable + enable */ |
49cd97a3 | 1083 | dev_priv->cdclk.hw.vco = -1; |
7ff89ca2 VS |
1084 | } |
1085 | ||
1086 | /** | |
1087 | * skl_init_cdclk - Initialize CDCLK on SKL | |
1088 | * @dev_priv: i915 device | |
1089 | * | |
1090 | * Initialize CDCLK for SKL and derivatives. This is generally | |
1091 | * done only during the display core initialization sequence, | |
1092 | * after which the DMC will take care of turning CDCLK off/on | |
1093 | * as needed. | |
1094 | */ | |
1095 | void skl_init_cdclk(struct drm_i915_private *dev_priv) | |
1096 | { | |
83c5fda7 | 1097 | struct intel_cdclk_state cdclk_state; |
7ff89ca2 VS |
1098 | |
1099 | skl_sanitize_cdclk(dev_priv); | |
1100 | ||
49cd97a3 VS |
1101 | if (dev_priv->cdclk.hw.cdclk != 0 && |
1102 | dev_priv->cdclk.hw.vco != 0) { | |
7ff89ca2 VS |
1103 | /* |
1104 | * Use the current vco as our initial | |
1105 | * guess as to what the preferred vco is. | |
1106 | */ | |
1107 | if (dev_priv->skl_preferred_vco_freq == 0) | |
1108 | skl_set_preferred_cdclk_vco(dev_priv, | |
49cd97a3 | 1109 | dev_priv->cdclk.hw.vco); |
7ff89ca2 VS |
1110 | return; |
1111 | } | |
1112 | ||
83c5fda7 VS |
1113 | cdclk_state = dev_priv->cdclk.hw; |
1114 | ||
1115 | cdclk_state.vco = dev_priv->skl_preferred_vco_freq; | |
1116 | if (cdclk_state.vco == 0) | |
1117 | cdclk_state.vco = 8100000; | |
1118 | cdclk_state.cdclk = skl_calc_cdclk(0, cdclk_state.vco); | |
2aa97491 | 1119 | cdclk_state.voltage_level = skl_calc_voltage_level(cdclk_state.cdclk); |
7ff89ca2 | 1120 | |
83c5fda7 | 1121 | skl_set_cdclk(dev_priv, &cdclk_state); |
7ff89ca2 VS |
1122 | } |
1123 | ||
1124 | /** | |
1125 | * skl_uninit_cdclk - Uninitialize CDCLK on SKL | |
1126 | * @dev_priv: i915 device | |
1127 | * | |
1128 | * Uninitialize CDCLK for SKL and derivatives. This is done only | |
1129 | * during the display core uninitialization sequence. | |
1130 | */ | |
1131 | void skl_uninit_cdclk(struct drm_i915_private *dev_priv) | |
1132 | { | |
83c5fda7 VS |
1133 | struct intel_cdclk_state cdclk_state = dev_priv->cdclk.hw; |
1134 | ||
1135 | cdclk_state.cdclk = cdclk_state.ref; | |
1136 | cdclk_state.vco = 0; | |
2aa97491 | 1137 | cdclk_state.voltage_level = skl_calc_voltage_level(cdclk_state.cdclk); |
83c5fda7 VS |
1138 | |
1139 | skl_set_cdclk(dev_priv, &cdclk_state); | |
7ff89ca2 VS |
1140 | } |
1141 | ||
d305e061 | 1142 | static int bxt_calc_cdclk(int min_cdclk) |
7ff89ca2 | 1143 | { |
d305e061 | 1144 | if (min_cdclk > 576000) |
7ff89ca2 | 1145 | return 624000; |
d305e061 | 1146 | else if (min_cdclk > 384000) |
7ff89ca2 | 1147 | return 576000; |
d305e061 | 1148 | else if (min_cdclk > 288000) |
7ff89ca2 | 1149 | return 384000; |
d305e061 | 1150 | else if (min_cdclk > 144000) |
7ff89ca2 VS |
1151 | return 288000; |
1152 | else | |
1153 | return 144000; | |
1154 | } | |
1155 | ||
d305e061 | 1156 | static int glk_calc_cdclk(int min_cdclk) |
7ff89ca2 | 1157 | { |
d305e061 | 1158 | if (min_cdclk > 158400) |
7ff89ca2 | 1159 | return 316800; |
d305e061 | 1160 | else if (min_cdclk > 79200) |
7ff89ca2 VS |
1161 | return 158400; |
1162 | else | |
1163 | return 79200; | |
1164 | } | |
1165 | ||
2123f442 VS |
1166 | static u8 bxt_calc_voltage_level(int cdclk) |
1167 | { | |
1168 | return DIV_ROUND_UP(cdclk, 25000); | |
1169 | } | |
1170 | ||
7ff89ca2 VS |
1171 | static int bxt_de_pll_vco(struct drm_i915_private *dev_priv, int cdclk) |
1172 | { | |
1173 | int ratio; | |
1174 | ||
49cd97a3 | 1175 | if (cdclk == dev_priv->cdclk.hw.ref) |
7ff89ca2 VS |
1176 | return 0; |
1177 | ||
1178 | switch (cdclk) { | |
1179 | default: | |
1180 | MISSING_CASE(cdclk); | |
2b58417f | 1181 | /* fall through */ |
7ff89ca2 VS |
1182 | case 144000: |
1183 | case 288000: | |
1184 | case 384000: | |
1185 | case 576000: | |
1186 | ratio = 60; | |
1187 | break; | |
1188 | case 624000: | |
1189 | ratio = 65; | |
1190 | break; | |
1191 | } | |
1192 | ||
49cd97a3 | 1193 | return dev_priv->cdclk.hw.ref * ratio; |
7ff89ca2 VS |
1194 | } |
1195 | ||
1196 | static int glk_de_pll_vco(struct drm_i915_private *dev_priv, int cdclk) | |
1197 | { | |
1198 | int ratio; | |
1199 | ||
49cd97a3 | 1200 | if (cdclk == dev_priv->cdclk.hw.ref) |
7ff89ca2 VS |
1201 | return 0; |
1202 | ||
1203 | switch (cdclk) { | |
1204 | default: | |
1205 | MISSING_CASE(cdclk); | |
2b58417f | 1206 | /* fall through */ |
7ff89ca2 VS |
1207 | case 79200: |
1208 | case 158400: | |
1209 | case 316800: | |
1210 | ratio = 33; | |
1211 | break; | |
1212 | } | |
1213 | ||
49cd97a3 | 1214 | return dev_priv->cdclk.hw.ref * ratio; |
7ff89ca2 VS |
1215 | } |
1216 | ||
49cd97a3 VS |
1217 | static void bxt_de_pll_update(struct drm_i915_private *dev_priv, |
1218 | struct intel_cdclk_state *cdclk_state) | |
7ff89ca2 VS |
1219 | { |
1220 | u32 val; | |
1221 | ||
49cd97a3 VS |
1222 | cdclk_state->ref = 19200; |
1223 | cdclk_state->vco = 0; | |
7ff89ca2 VS |
1224 | |
1225 | val = I915_READ(BXT_DE_PLL_ENABLE); | |
1226 | if ((val & BXT_DE_PLL_PLL_ENABLE) == 0) | |
1227 | return; | |
1228 | ||
1229 | if (WARN_ON((val & BXT_DE_PLL_LOCK) == 0)) | |
1230 | return; | |
1231 | ||
1232 | val = I915_READ(BXT_DE_PLL_CTL); | |
49cd97a3 | 1233 | cdclk_state->vco = (val & BXT_DE_PLL_RATIO_MASK) * cdclk_state->ref; |
7ff89ca2 VS |
1234 | } |
1235 | ||
49cd97a3 VS |
1236 | static void bxt_get_cdclk(struct drm_i915_private *dev_priv, |
1237 | struct intel_cdclk_state *cdclk_state) | |
7ff89ca2 VS |
1238 | { |
1239 | u32 divider; | |
49cd97a3 | 1240 | int div; |
7ff89ca2 | 1241 | |
49cd97a3 | 1242 | bxt_de_pll_update(dev_priv, cdclk_state); |
7ff89ca2 | 1243 | |
49cd97a3 VS |
1244 | cdclk_state->cdclk = cdclk_state->ref; |
1245 | ||
1246 | if (cdclk_state->vco == 0) | |
2123f442 | 1247 | goto out; |
7ff89ca2 VS |
1248 | |
1249 | divider = I915_READ(CDCLK_CTL) & BXT_CDCLK_CD2X_DIV_SEL_MASK; | |
1250 | ||
1251 | switch (divider) { | |
1252 | case BXT_CDCLK_CD2X_DIV_SEL_1: | |
1253 | div = 2; | |
1254 | break; | |
1255 | case BXT_CDCLK_CD2X_DIV_SEL_1_5: | |
1256 | WARN(IS_GEMINILAKE(dev_priv), "Unsupported divider\n"); | |
1257 | div = 3; | |
1258 | break; | |
1259 | case BXT_CDCLK_CD2X_DIV_SEL_2: | |
1260 | div = 4; | |
1261 | break; | |
1262 | case BXT_CDCLK_CD2X_DIV_SEL_4: | |
1263 | div = 8; | |
1264 | break; | |
1265 | default: | |
1266 | MISSING_CASE(divider); | |
49cd97a3 | 1267 | return; |
7ff89ca2 VS |
1268 | } |
1269 | ||
49cd97a3 | 1270 | cdclk_state->cdclk = DIV_ROUND_CLOSEST(cdclk_state->vco, div); |
2123f442 VS |
1271 | |
1272 | out: | |
1273 | /* | |
1274 | * Can't read this out :( Let's assume it's | |
1275 | * at least what the CDCLK frequency requires. | |
1276 | */ | |
1277 | cdclk_state->voltage_level = | |
1278 | bxt_calc_voltage_level(cdclk_state->cdclk); | |
7ff89ca2 VS |
1279 | } |
1280 | ||
1281 | static void bxt_de_pll_disable(struct drm_i915_private *dev_priv) | |
1282 | { | |
1283 | I915_WRITE(BXT_DE_PLL_ENABLE, 0); | |
1284 | ||
1285 | /* Timeout 200us */ | |
1286 | if (intel_wait_for_register(dev_priv, | |
1287 | BXT_DE_PLL_ENABLE, BXT_DE_PLL_LOCK, 0, | |
1288 | 1)) | |
1289 | DRM_ERROR("timeout waiting for DE PLL unlock\n"); | |
1290 | ||
49cd97a3 | 1291 | dev_priv->cdclk.hw.vco = 0; |
7ff89ca2 VS |
1292 | } |
1293 | ||
1294 | static void bxt_de_pll_enable(struct drm_i915_private *dev_priv, int vco) | |
1295 | { | |
49cd97a3 | 1296 | int ratio = DIV_ROUND_CLOSEST(vco, dev_priv->cdclk.hw.ref); |
7ff89ca2 VS |
1297 | u32 val; |
1298 | ||
1299 | val = I915_READ(BXT_DE_PLL_CTL); | |
1300 | val &= ~BXT_DE_PLL_RATIO_MASK; | |
1301 | val |= BXT_DE_PLL_RATIO(ratio); | |
1302 | I915_WRITE(BXT_DE_PLL_CTL, val); | |
1303 | ||
1304 | I915_WRITE(BXT_DE_PLL_ENABLE, BXT_DE_PLL_PLL_ENABLE); | |
1305 | ||
1306 | /* Timeout 200us */ | |
1307 | if (intel_wait_for_register(dev_priv, | |
1308 | BXT_DE_PLL_ENABLE, | |
1309 | BXT_DE_PLL_LOCK, | |
1310 | BXT_DE_PLL_LOCK, | |
1311 | 1)) | |
1312 | DRM_ERROR("timeout waiting for DE PLL lock\n"); | |
1313 | ||
49cd97a3 | 1314 | dev_priv->cdclk.hw.vco = vco; |
7ff89ca2 VS |
1315 | } |
1316 | ||
8f0cfa4d | 1317 | static void bxt_set_cdclk(struct drm_i915_private *dev_priv, |
83c5fda7 | 1318 | const struct intel_cdclk_state *cdclk_state) |
7ff89ca2 | 1319 | { |
83c5fda7 VS |
1320 | int cdclk = cdclk_state->cdclk; |
1321 | int vco = cdclk_state->vco; | |
7ff89ca2 | 1322 | u32 val, divider; |
8f0cfa4d | 1323 | int ret; |
7ff89ca2 | 1324 | |
7ff89ca2 VS |
1325 | /* cdclk = vco / 2 / div{1,1.5,2,4} */ |
1326 | switch (DIV_ROUND_CLOSEST(vco, cdclk)) { | |
2b58417f VS |
1327 | default: |
1328 | WARN_ON(cdclk != dev_priv->cdclk.hw.ref); | |
1329 | WARN_ON(vco != 0); | |
1330 | /* fall through */ | |
1331 | case 2: | |
1332 | divider = BXT_CDCLK_CD2X_DIV_SEL_1; | |
7ff89ca2 VS |
1333 | break; |
1334 | case 3: | |
1335 | WARN(IS_GEMINILAKE(dev_priv), "Unsupported divider\n"); | |
1336 | divider = BXT_CDCLK_CD2X_DIV_SEL_1_5; | |
1337 | break; | |
2b58417f VS |
1338 | case 4: |
1339 | divider = BXT_CDCLK_CD2X_DIV_SEL_2; | |
7ff89ca2 | 1340 | break; |
2b58417f VS |
1341 | case 8: |
1342 | divider = BXT_CDCLK_CD2X_DIV_SEL_4; | |
7ff89ca2 VS |
1343 | break; |
1344 | } | |
1345 | ||
1346 | /* Inform power controller of upcoming frequency change */ | |
9f817501 | 1347 | mutex_lock(&dev_priv->pcu_lock); |
7ff89ca2 VS |
1348 | ret = sandybridge_pcode_write(dev_priv, HSW_PCODE_DE_WRITE_FREQ_REQ, |
1349 | 0x80000000); | |
9f817501 | 1350 | mutex_unlock(&dev_priv->pcu_lock); |
7ff89ca2 VS |
1351 | |
1352 | if (ret) { | |
1353 | DRM_ERROR("PCode CDCLK freq change notify failed (err %d, freq %d)\n", | |
1354 | ret, cdclk); | |
1355 | return; | |
1356 | } | |
1357 | ||
49cd97a3 VS |
1358 | if (dev_priv->cdclk.hw.vco != 0 && |
1359 | dev_priv->cdclk.hw.vco != vco) | |
7ff89ca2 VS |
1360 | bxt_de_pll_disable(dev_priv); |
1361 | ||
49cd97a3 | 1362 | if (dev_priv->cdclk.hw.vco != vco) |
7ff89ca2 VS |
1363 | bxt_de_pll_enable(dev_priv, vco); |
1364 | ||
1365 | val = divider | skl_cdclk_decimal(cdclk); | |
1366 | /* | |
1367 | * FIXME if only the cd2x divider needs changing, it could be done | |
1368 | * without shutting off the pipe (if only one pipe is active). | |
1369 | */ | |
1370 | val |= BXT_CDCLK_CD2X_PIPE_NONE; | |
1371 | /* | |
1372 | * Disable SSA Precharge when CD clock frequency < 500 MHz, | |
1373 | * enable otherwise. | |
1374 | */ | |
1375 | if (cdclk >= 500000) | |
1376 | val |= BXT_CDCLK_SSA_PRECHARGE_ENABLE; | |
1377 | I915_WRITE(CDCLK_CTL, val); | |
1378 | ||
9f817501 | 1379 | mutex_lock(&dev_priv->pcu_lock); |
7ff89ca2 | 1380 | ret = sandybridge_pcode_write(dev_priv, HSW_PCODE_DE_WRITE_FREQ_REQ, |
2123f442 | 1381 | cdclk_state->voltage_level); |
9f817501 | 1382 | mutex_unlock(&dev_priv->pcu_lock); |
7ff89ca2 VS |
1383 | |
1384 | if (ret) { | |
1385 | DRM_ERROR("PCode CDCLK freq set failed, (err %d, freq %d)\n", | |
1386 | ret, cdclk); | |
1387 | return; | |
1388 | } | |
1389 | ||
1390 | intel_update_cdclk(dev_priv); | |
1391 | } | |
1392 | ||
1393 | static void bxt_sanitize_cdclk(struct drm_i915_private *dev_priv) | |
1394 | { | |
1395 | u32 cdctl, expected; | |
1396 | ||
1397 | intel_update_cdclk(dev_priv); | |
1398 | ||
49cd97a3 VS |
1399 | if (dev_priv->cdclk.hw.vco == 0 || |
1400 | dev_priv->cdclk.hw.cdclk == dev_priv->cdclk.hw.ref) | |
7ff89ca2 VS |
1401 | goto sanitize; |
1402 | ||
1403 | /* DPLL okay; verify the cdclock | |
1404 | * | |
1405 | * Some BIOS versions leave an incorrect decimal frequency value and | |
1406 | * set reserved MBZ bits in CDCLK_CTL at least during exiting from S4, | |
1407 | * so sanitize this register. | |
1408 | */ | |
1409 | cdctl = I915_READ(CDCLK_CTL); | |
1410 | /* | |
1411 | * Let's ignore the pipe field, since BIOS could have configured the | |
1412 | * dividers both synching to an active pipe, or asynchronously | |
1413 | * (PIPE_NONE). | |
1414 | */ | |
1415 | cdctl &= ~BXT_CDCLK_CD2X_PIPE_NONE; | |
1416 | ||
1417 | expected = (cdctl & BXT_CDCLK_CD2X_DIV_SEL_MASK) | | |
49cd97a3 | 1418 | skl_cdclk_decimal(dev_priv->cdclk.hw.cdclk); |
7ff89ca2 VS |
1419 | /* |
1420 | * Disable SSA Precharge when CD clock frequency < 500 MHz, | |
1421 | * enable otherwise. | |
1422 | */ | |
49cd97a3 | 1423 | if (dev_priv->cdclk.hw.cdclk >= 500000) |
7ff89ca2 VS |
1424 | expected |= BXT_CDCLK_SSA_PRECHARGE_ENABLE; |
1425 | ||
1426 | if (cdctl == expected) | |
1427 | /* All well; nothing to sanitize */ | |
1428 | return; | |
1429 | ||
1430 | sanitize: | |
1431 | DRM_DEBUG_KMS("Sanitizing cdclk programmed by pre-os\n"); | |
1432 | ||
1433 | /* force cdclk programming */ | |
49cd97a3 | 1434 | dev_priv->cdclk.hw.cdclk = 0; |
7ff89ca2 VS |
1435 | |
1436 | /* force full PLL disable + enable */ | |
49cd97a3 | 1437 | dev_priv->cdclk.hw.vco = -1; |
7ff89ca2 VS |
1438 | } |
1439 | ||
1440 | /** | |
1441 | * bxt_init_cdclk - Initialize CDCLK on BXT | |
1442 | * @dev_priv: i915 device | |
1443 | * | |
1444 | * Initialize CDCLK for BXT and derivatives. This is generally | |
1445 | * done only during the display core initialization sequence, | |
1446 | * after which the DMC will take care of turning CDCLK off/on | |
1447 | * as needed. | |
1448 | */ | |
1449 | void bxt_init_cdclk(struct drm_i915_private *dev_priv) | |
1450 | { | |
83c5fda7 | 1451 | struct intel_cdclk_state cdclk_state; |
7ff89ca2 VS |
1452 | |
1453 | bxt_sanitize_cdclk(dev_priv); | |
1454 | ||
49cd97a3 VS |
1455 | if (dev_priv->cdclk.hw.cdclk != 0 && |
1456 | dev_priv->cdclk.hw.vco != 0) | |
7ff89ca2 VS |
1457 | return; |
1458 | ||
83c5fda7 VS |
1459 | cdclk_state = dev_priv->cdclk.hw; |
1460 | ||
7ff89ca2 VS |
1461 | /* |
1462 | * FIXME: | |
1463 | * - The initial CDCLK needs to be read from VBT. | |
1464 | * Need to make this change after VBT has changes for BXT. | |
1465 | */ | |
8f0cfa4d | 1466 | if (IS_GEMINILAKE(dev_priv)) { |
83c5fda7 VS |
1467 | cdclk_state.cdclk = glk_calc_cdclk(0); |
1468 | cdclk_state.vco = glk_de_pll_vco(dev_priv, cdclk_state.cdclk); | |
8f0cfa4d | 1469 | } else { |
83c5fda7 VS |
1470 | cdclk_state.cdclk = bxt_calc_cdclk(0); |
1471 | cdclk_state.vco = bxt_de_pll_vco(dev_priv, cdclk_state.cdclk); | |
8f0cfa4d | 1472 | } |
2123f442 | 1473 | cdclk_state.voltage_level = bxt_calc_voltage_level(cdclk_state.cdclk); |
7ff89ca2 | 1474 | |
83c5fda7 | 1475 | bxt_set_cdclk(dev_priv, &cdclk_state); |
7ff89ca2 VS |
1476 | } |
1477 | ||
1478 | /** | |
1479 | * bxt_uninit_cdclk - Uninitialize CDCLK on BXT | |
1480 | * @dev_priv: i915 device | |
1481 | * | |
1482 | * Uninitialize CDCLK for BXT and derivatives. This is done only | |
1483 | * during the display core uninitialization sequence. | |
1484 | */ | |
1485 | void bxt_uninit_cdclk(struct drm_i915_private *dev_priv) | |
1486 | { | |
83c5fda7 VS |
1487 | struct intel_cdclk_state cdclk_state = dev_priv->cdclk.hw; |
1488 | ||
1489 | cdclk_state.cdclk = cdclk_state.ref; | |
1490 | cdclk_state.vco = 0; | |
2123f442 | 1491 | cdclk_state.voltage_level = bxt_calc_voltage_level(cdclk_state.cdclk); |
83c5fda7 VS |
1492 | |
1493 | bxt_set_cdclk(dev_priv, &cdclk_state); | |
49cd97a3 VS |
1494 | } |
1495 | ||
d305e061 | 1496 | static int cnl_calc_cdclk(int min_cdclk) |
d1999e9e | 1497 | { |
d305e061 | 1498 | if (min_cdclk > 336000) |
d1999e9e | 1499 | return 528000; |
d305e061 | 1500 | else if (min_cdclk > 168000) |
d1999e9e RV |
1501 | return 336000; |
1502 | else | |
1503 | return 168000; | |
1504 | } | |
1505 | ||
48469ece VS |
1506 | static u8 cnl_calc_voltage_level(int cdclk) |
1507 | { | |
1508 | switch (cdclk) { | |
1509 | default: | |
1510 | case 168000: | |
1511 | return 0; | |
1512 | case 336000: | |
1513 | return 1; | |
1514 | case 528000: | |
1515 | return 2; | |
1516 | } | |
1517 | } | |
1518 | ||
945f2672 VS |
1519 | static void cnl_cdclk_pll_update(struct drm_i915_private *dev_priv, |
1520 | struct intel_cdclk_state *cdclk_state) | |
1521 | { | |
1522 | u32 val; | |
1523 | ||
1524 | if (I915_READ(SKL_DSSM) & CNL_DSSM_CDCLK_PLL_REFCLK_24MHz) | |
1525 | cdclk_state->ref = 24000; | |
1526 | else | |
1527 | cdclk_state->ref = 19200; | |
1528 | ||
1529 | cdclk_state->vco = 0; | |
1530 | ||
1531 | val = I915_READ(BXT_DE_PLL_ENABLE); | |
1532 | if ((val & BXT_DE_PLL_PLL_ENABLE) == 0) | |
1533 | return; | |
1534 | ||
1535 | if (WARN_ON((val & BXT_DE_PLL_LOCK) == 0)) | |
1536 | return; | |
1537 | ||
1538 | cdclk_state->vco = (val & CNL_CDCLK_PLL_RATIO_MASK) * cdclk_state->ref; | |
1539 | } | |
1540 | ||
1541 | static void cnl_get_cdclk(struct drm_i915_private *dev_priv, | |
1542 | struct intel_cdclk_state *cdclk_state) | |
1543 | { | |
1544 | u32 divider; | |
1545 | int div; | |
1546 | ||
1547 | cnl_cdclk_pll_update(dev_priv, cdclk_state); | |
1548 | ||
1549 | cdclk_state->cdclk = cdclk_state->ref; | |
1550 | ||
1551 | if (cdclk_state->vco == 0) | |
48469ece | 1552 | goto out; |
945f2672 VS |
1553 | |
1554 | divider = I915_READ(CDCLK_CTL) & BXT_CDCLK_CD2X_DIV_SEL_MASK; | |
1555 | ||
1556 | switch (divider) { | |
1557 | case BXT_CDCLK_CD2X_DIV_SEL_1: | |
1558 | div = 2; | |
1559 | break; | |
1560 | case BXT_CDCLK_CD2X_DIV_SEL_2: | |
1561 | div = 4; | |
1562 | break; | |
1563 | default: | |
1564 | MISSING_CASE(divider); | |
1565 | return; | |
1566 | } | |
1567 | ||
1568 | cdclk_state->cdclk = DIV_ROUND_CLOSEST(cdclk_state->vco, div); | |
48469ece VS |
1569 | |
1570 | out: | |
1571 | /* | |
1572 | * Can't read this out :( Let's assume it's | |
1573 | * at least what the CDCLK frequency requires. | |
1574 | */ | |
1575 | cdclk_state->voltage_level = | |
1576 | cnl_calc_voltage_level(cdclk_state->cdclk); | |
945f2672 VS |
1577 | } |
1578 | ||
ef4f7a68 VS |
1579 | static void cnl_cdclk_pll_disable(struct drm_i915_private *dev_priv) |
1580 | { | |
1581 | u32 val; | |
1582 | ||
1583 | val = I915_READ(BXT_DE_PLL_ENABLE); | |
1584 | val &= ~BXT_DE_PLL_PLL_ENABLE; | |
1585 | I915_WRITE(BXT_DE_PLL_ENABLE, val); | |
1586 | ||
1587 | /* Timeout 200us */ | |
1588 | if (wait_for((I915_READ(BXT_DE_PLL_ENABLE) & BXT_DE_PLL_LOCK) == 0, 1)) | |
1589 | DRM_ERROR("timout waiting for CDCLK PLL unlock\n"); | |
1590 | ||
1591 | dev_priv->cdclk.hw.vco = 0; | |
1592 | } | |
1593 | ||
1594 | static void cnl_cdclk_pll_enable(struct drm_i915_private *dev_priv, int vco) | |
1595 | { | |
1596 | int ratio = DIV_ROUND_CLOSEST(vco, dev_priv->cdclk.hw.ref); | |
1597 | u32 val; | |
1598 | ||
1599 | val = CNL_CDCLK_PLL_RATIO(ratio); | |
1600 | I915_WRITE(BXT_DE_PLL_ENABLE, val); | |
1601 | ||
1602 | val |= BXT_DE_PLL_PLL_ENABLE; | |
1603 | I915_WRITE(BXT_DE_PLL_ENABLE, val); | |
1604 | ||
1605 | /* Timeout 200us */ | |
1606 | if (wait_for((I915_READ(BXT_DE_PLL_ENABLE) & BXT_DE_PLL_LOCK) != 0, 1)) | |
1607 | DRM_ERROR("timout waiting for CDCLK PLL lock\n"); | |
1608 | ||
1609 | dev_priv->cdclk.hw.vco = vco; | |
1610 | } | |
1611 | ||
ef4f7a68 VS |
1612 | static void cnl_set_cdclk(struct drm_i915_private *dev_priv, |
1613 | const struct intel_cdclk_state *cdclk_state) | |
1614 | { | |
1615 | int cdclk = cdclk_state->cdclk; | |
1616 | int vco = cdclk_state->vco; | |
48469ece | 1617 | u32 val, divider; |
ef4f7a68 VS |
1618 | int ret; |
1619 | ||
9f817501 | 1620 | mutex_lock(&dev_priv->pcu_lock); |
ef4f7a68 VS |
1621 | ret = skl_pcode_request(dev_priv, SKL_PCODE_CDCLK_CONTROL, |
1622 | SKL_CDCLK_PREPARE_FOR_CHANGE, | |
1623 | SKL_CDCLK_READY_FOR_CHANGE, | |
1624 | SKL_CDCLK_READY_FOR_CHANGE, 3); | |
9f817501 | 1625 | mutex_unlock(&dev_priv->pcu_lock); |
ef4f7a68 VS |
1626 | if (ret) { |
1627 | DRM_ERROR("Failed to inform PCU about cdclk change (%d)\n", | |
1628 | ret); | |
1629 | return; | |
1630 | } | |
1631 | ||
1632 | /* cdclk = vco / 2 / div{1,2} */ | |
1633 | switch (DIV_ROUND_CLOSEST(vco, cdclk)) { | |
ef4f7a68 VS |
1634 | default: |
1635 | WARN_ON(cdclk != dev_priv->cdclk.hw.ref); | |
1636 | WARN_ON(vco != 0); | |
2b58417f VS |
1637 | /* fall through */ |
1638 | case 2: | |
ef4f7a68 VS |
1639 | divider = BXT_CDCLK_CD2X_DIV_SEL_1; |
1640 | break; | |
2b58417f VS |
1641 | case 4: |
1642 | divider = BXT_CDCLK_CD2X_DIV_SEL_2; | |
1643 | break; | |
ef4f7a68 VS |
1644 | } |
1645 | ||
ef4f7a68 VS |
1646 | if (dev_priv->cdclk.hw.vco != 0 && |
1647 | dev_priv->cdclk.hw.vco != vco) | |
1648 | cnl_cdclk_pll_disable(dev_priv); | |
1649 | ||
1650 | if (dev_priv->cdclk.hw.vco != vco) | |
1651 | cnl_cdclk_pll_enable(dev_priv, vco); | |
1652 | ||
1653 | val = divider | skl_cdclk_decimal(cdclk); | |
1654 | /* | |
1655 | * FIXME if only the cd2x divider needs changing, it could be done | |
1656 | * without shutting off the pipe (if only one pipe is active). | |
1657 | */ | |
1658 | val |= BXT_CDCLK_CD2X_PIPE_NONE; | |
1659 | I915_WRITE(CDCLK_CTL, val); | |
1660 | ||
1661 | /* inform PCU of the change */ | |
9f817501 | 1662 | mutex_lock(&dev_priv->pcu_lock); |
48469ece VS |
1663 | sandybridge_pcode_write(dev_priv, SKL_PCODE_CDCLK_CONTROL, |
1664 | cdclk_state->voltage_level); | |
9f817501 | 1665 | mutex_unlock(&dev_priv->pcu_lock); |
ef4f7a68 VS |
1666 | |
1667 | intel_update_cdclk(dev_priv); | |
53e9bf5e VS |
1668 | |
1669 | /* | |
1670 | * Can't read out the voltage level :( | |
1671 | * Let's just assume everything is as expected. | |
1672 | */ | |
1673 | dev_priv->cdclk.hw.voltage_level = cdclk_state->voltage_level; | |
ef4f7a68 VS |
1674 | } |
1675 | ||
d8d4a512 VS |
1676 | static int cnl_cdclk_pll_vco(struct drm_i915_private *dev_priv, int cdclk) |
1677 | { | |
1678 | int ratio; | |
1679 | ||
1680 | if (cdclk == dev_priv->cdclk.hw.ref) | |
1681 | return 0; | |
1682 | ||
1683 | switch (cdclk) { | |
1684 | default: | |
1685 | MISSING_CASE(cdclk); | |
2b58417f | 1686 | /* fall through */ |
d8d4a512 VS |
1687 | case 168000: |
1688 | case 336000: | |
1689 | ratio = dev_priv->cdclk.hw.ref == 19200 ? 35 : 28; | |
1690 | break; | |
1691 | case 528000: | |
1692 | ratio = dev_priv->cdclk.hw.ref == 19200 ? 55 : 44; | |
1693 | break; | |
1694 | } | |
1695 | ||
1696 | return dev_priv->cdclk.hw.ref * ratio; | |
1697 | } | |
1698 | ||
1699 | static void cnl_sanitize_cdclk(struct drm_i915_private *dev_priv) | |
1700 | { | |
1701 | u32 cdctl, expected; | |
1702 | ||
1703 | intel_update_cdclk(dev_priv); | |
1704 | ||
1705 | if (dev_priv->cdclk.hw.vco == 0 || | |
1706 | dev_priv->cdclk.hw.cdclk == dev_priv->cdclk.hw.ref) | |
1707 | goto sanitize; | |
1708 | ||
1709 | /* DPLL okay; verify the cdclock | |
1710 | * | |
1711 | * Some BIOS versions leave an incorrect decimal frequency value and | |
1712 | * set reserved MBZ bits in CDCLK_CTL at least during exiting from S4, | |
1713 | * so sanitize this register. | |
1714 | */ | |
1715 | cdctl = I915_READ(CDCLK_CTL); | |
1716 | /* | |
1717 | * Let's ignore the pipe field, since BIOS could have configured the | |
1718 | * dividers both synching to an active pipe, or asynchronously | |
1719 | * (PIPE_NONE). | |
1720 | */ | |
1721 | cdctl &= ~BXT_CDCLK_CD2X_PIPE_NONE; | |
1722 | ||
1723 | expected = (cdctl & BXT_CDCLK_CD2X_DIV_SEL_MASK) | | |
1724 | skl_cdclk_decimal(dev_priv->cdclk.hw.cdclk); | |
1725 | ||
1726 | if (cdctl == expected) | |
1727 | /* All well; nothing to sanitize */ | |
1728 | return; | |
1729 | ||
1730 | sanitize: | |
1731 | DRM_DEBUG_KMS("Sanitizing cdclk programmed by pre-os\n"); | |
1732 | ||
1733 | /* force cdclk programming */ | |
1734 | dev_priv->cdclk.hw.cdclk = 0; | |
1735 | ||
1736 | /* force full PLL disable + enable */ | |
1737 | dev_priv->cdclk.hw.vco = -1; | |
1738 | } | |
1739 | ||
1740 | /** | |
1741 | * cnl_init_cdclk - Initialize CDCLK on CNL | |
1742 | * @dev_priv: i915 device | |
1743 | * | |
1744 | * Initialize CDCLK for CNL. This is generally | |
1745 | * done only during the display core initialization sequence, | |
1746 | * after which the DMC will take care of turning CDCLK off/on | |
1747 | * as needed. | |
1748 | */ | |
1749 | void cnl_init_cdclk(struct drm_i915_private *dev_priv) | |
1750 | { | |
1751 | struct intel_cdclk_state cdclk_state; | |
1752 | ||
1753 | cnl_sanitize_cdclk(dev_priv); | |
1754 | ||
1755 | if (dev_priv->cdclk.hw.cdclk != 0 && | |
1756 | dev_priv->cdclk.hw.vco != 0) | |
1757 | return; | |
1758 | ||
1759 | cdclk_state = dev_priv->cdclk.hw; | |
1760 | ||
d1999e9e | 1761 | cdclk_state.cdclk = cnl_calc_cdclk(0); |
d8d4a512 | 1762 | cdclk_state.vco = cnl_cdclk_pll_vco(dev_priv, cdclk_state.cdclk); |
48469ece | 1763 | cdclk_state.voltage_level = cnl_calc_voltage_level(cdclk_state.cdclk); |
d8d4a512 VS |
1764 | |
1765 | cnl_set_cdclk(dev_priv, &cdclk_state); | |
1766 | } | |
1767 | ||
1768 | /** | |
1769 | * cnl_uninit_cdclk - Uninitialize CDCLK on CNL | |
1770 | * @dev_priv: i915 device | |
1771 | * | |
1772 | * Uninitialize CDCLK for CNL. This is done only | |
1773 | * during the display core uninitialization sequence. | |
1774 | */ | |
1775 | void cnl_uninit_cdclk(struct drm_i915_private *dev_priv) | |
1776 | { | |
1777 | struct intel_cdclk_state cdclk_state = dev_priv->cdclk.hw; | |
1778 | ||
1779 | cdclk_state.cdclk = cdclk_state.ref; | |
1780 | cdclk_state.vco = 0; | |
48469ece | 1781 | cdclk_state.voltage_level = cnl_calc_voltage_level(cdclk_state.cdclk); |
d8d4a512 VS |
1782 | |
1783 | cnl_set_cdclk(dev_priv, &cdclk_state); | |
1784 | } | |
1785 | ||
49cd97a3 | 1786 | /** |
64600bd5 | 1787 | * intel_cdclk_needs_modeset - Determine if two CDCLK states require a modeset on all pipes |
49cd97a3 VS |
1788 | * @a: first CDCLK state |
1789 | * @b: second CDCLK state | |
1790 | * | |
1791 | * Returns: | |
64600bd5 | 1792 | * True if the CDCLK states require pipes to be off during reprogramming, false if not. |
49cd97a3 | 1793 | */ |
64600bd5 | 1794 | bool intel_cdclk_needs_modeset(const struct intel_cdclk_state *a, |
49cd97a3 VS |
1795 | const struct intel_cdclk_state *b) |
1796 | { | |
64600bd5 VS |
1797 | return a->cdclk != b->cdclk || |
1798 | a->vco != b->vco || | |
1799 | a->ref != b->ref; | |
1800 | } | |
1801 | ||
1802 | /** | |
1803 | * intel_cdclk_changed - Determine if two CDCLK states are different | |
1804 | * @a: first CDCLK state | |
1805 | * @b: second CDCLK state | |
1806 | * | |
1807 | * Returns: | |
1808 | * True if the CDCLK states don't match, false if they do. | |
1809 | */ | |
1810 | bool intel_cdclk_changed(const struct intel_cdclk_state *a, | |
1811 | const struct intel_cdclk_state *b) | |
1812 | { | |
1813 | return intel_cdclk_needs_modeset(a, b) || | |
1814 | a->voltage_level != b->voltage_level; | |
7ff89ca2 VS |
1815 | } |
1816 | ||
b0587e4d VS |
1817 | /** |
1818 | * intel_set_cdclk - Push the CDCLK state to the hardware | |
1819 | * @dev_priv: i915 device | |
1820 | * @cdclk_state: new CDCLK state | |
1821 | * | |
1822 | * Program the hardware based on the passed in CDCLK state, | |
1823 | * if necessary. | |
1824 | */ | |
1825 | void intel_set_cdclk(struct drm_i915_private *dev_priv, | |
1826 | const struct intel_cdclk_state *cdclk_state) | |
1827 | { | |
64600bd5 | 1828 | if (!intel_cdclk_changed(&dev_priv->cdclk.hw, cdclk_state)) |
b0587e4d VS |
1829 | return; |
1830 | ||
1831 | if (WARN_ON_ONCE(!dev_priv->display.set_cdclk)) | |
1832 | return; | |
1833 | ||
64600bd5 | 1834 | DRM_DEBUG_DRIVER("Changing CDCLK to %d kHz, VCO %d kHz, ref %d kHz, voltage_level %d\n", |
b0587e4d | 1835 | cdclk_state->cdclk, cdclk_state->vco, |
64600bd5 | 1836 | cdclk_state->ref, cdclk_state->voltage_level); |
b0587e4d VS |
1837 | |
1838 | dev_priv->display.set_cdclk(dev_priv, cdclk_state); | |
1839 | } | |
1840 | ||
d305e061 VS |
1841 | static int intel_pixel_rate_to_cdclk(struct drm_i915_private *dev_priv, |
1842 | int pixel_rate) | |
1843 | { | |
1844 | if (INTEL_GEN(dev_priv) >= 10) | |
1845 | /* | |
1846 | * FIXME: Switch to DIV_ROUND_UP(pixel_rate, 2) | |
1847 | * once DDI clock voltage requirements are | |
1848 | * handled correctly. | |
1849 | */ | |
1850 | return pixel_rate; | |
1851 | else if (IS_GEMINILAKE(dev_priv)) | |
1852 | /* | |
1853 | * FIXME: Avoid using a pixel clock that is more than 99% of the cdclk | |
1854 | * as a temporary workaround. Use a higher cdclk instead. (Note that | |
1855 | * intel_compute_max_dotclk() limits the max pixel clock to 99% of max | |
1856 | * cdclk.) | |
1857 | */ | |
1858 | return DIV_ROUND_UP(pixel_rate * 100, 2 * 99); | |
1859 | else if (IS_GEN9(dev_priv) || | |
1860 | IS_BROADWELL(dev_priv) || IS_HASWELL(dev_priv)) | |
1861 | return pixel_rate; | |
1862 | else if (IS_CHERRYVIEW(dev_priv)) | |
1863 | return DIV_ROUND_UP(pixel_rate * 100, 95); | |
1864 | else | |
1865 | return DIV_ROUND_UP(pixel_rate * 100, 90); | |
1866 | } | |
1867 | ||
1868 | int intel_crtc_compute_min_cdclk(const struct intel_crtc_state *crtc_state) | |
7ff89ca2 VS |
1869 | { |
1870 | struct drm_i915_private *dev_priv = | |
1871 | to_i915(crtc_state->base.crtc->dev); | |
d305e061 VS |
1872 | int min_cdclk; |
1873 | ||
1874 | if (!crtc_state->base.enable) | |
1875 | return 0; | |
1876 | ||
1877 | min_cdclk = intel_pixel_rate_to_cdclk(dev_priv, crtc_state->pixel_rate); | |
7ff89ca2 VS |
1878 | |
1879 | /* pixel rate mustn't exceed 95% of cdclk with IPS on BDW */ | |
1880 | if (IS_BROADWELL(dev_priv) && crtc_state->ips_enabled) | |
d305e061 | 1881 | min_cdclk = DIV_ROUND_UP(min_cdclk * 100, 95); |
7ff89ca2 | 1882 | |
78cfa580 PD |
1883 | /* BSpec says "Do not use DisplayPort with CDCLK less than 432 MHz, |
1884 | * audio enabled, port width x4, and link rate HBR2 (5.4 GHz), or else | |
1885 | * there may be audio corruption or screen corruption." This cdclk | |
d305e061 | 1886 | * restriction for GLK is 316.8 MHz. |
7ff89ca2 VS |
1887 | */ |
1888 | if (intel_crtc_has_dp_encoder(crtc_state) && | |
1889 | crtc_state->has_audio && | |
1890 | crtc_state->port_clock >= 540000 && | |
78cfa580 | 1891 | crtc_state->lane_count == 4) { |
d305e061 VS |
1892 | if (IS_CANNONLAKE(dev_priv) || IS_GEMINILAKE(dev_priv)) { |
1893 | /* Display WA #1145: glk,cnl */ | |
1894 | min_cdclk = max(316800, min_cdclk); | |
1895 | } else if (IS_GEN9(dev_priv) || IS_BROADWELL(dev_priv)) { | |
1896 | /* Display WA #1144: skl,bxt */ | |
1897 | min_cdclk = max(432000, min_cdclk); | |
1898 | } | |
78cfa580 | 1899 | } |
7ff89ca2 | 1900 | |
8cbeb06d PD |
1901 | /* According to BSpec, "The CD clock frequency must be at least twice |
1902 | * the frequency of the Azalia BCLK." and BCLK is 96 MHz by default. | |
8cbeb06d | 1903 | */ |
d305e061 VS |
1904 | if (crtc_state->has_audio && INTEL_GEN(dev_priv) >= 9) |
1905 | min_cdclk = max(2 * 96000, min_cdclk); | |
8cbeb06d | 1906 | |
9c61de4c VS |
1907 | if (min_cdclk > dev_priv->max_cdclk_freq) { |
1908 | DRM_DEBUG_KMS("required cdclk (%d kHz) exceeds max (%d kHz)\n", | |
1909 | min_cdclk, dev_priv->max_cdclk_freq); | |
1910 | return -EINVAL; | |
1911 | } | |
1912 | ||
d305e061 | 1913 | return min_cdclk; |
7ff89ca2 VS |
1914 | } |
1915 | ||
d305e061 | 1916 | static int intel_compute_min_cdclk(struct drm_atomic_state *state) |
7ff89ca2 VS |
1917 | { |
1918 | struct intel_atomic_state *intel_state = to_intel_atomic_state(state); | |
1919 | struct drm_i915_private *dev_priv = to_i915(state->dev); | |
d305e061 | 1920 | struct intel_crtc *crtc; |
7ff89ca2 | 1921 | struct intel_crtc_state *crtc_state; |
9c61de4c | 1922 | int min_cdclk, i; |
7ff89ca2 VS |
1923 | enum pipe pipe; |
1924 | ||
d305e061 VS |
1925 | memcpy(intel_state->min_cdclk, dev_priv->min_cdclk, |
1926 | sizeof(intel_state->min_cdclk)); | |
7ff89ca2 | 1927 | |
9c61de4c VS |
1928 | for_each_new_intel_crtc_in_state(intel_state, crtc, crtc_state, i) { |
1929 | min_cdclk = intel_crtc_compute_min_cdclk(crtc_state); | |
1930 | if (min_cdclk < 0) | |
1931 | return min_cdclk; | |
1932 | ||
1933 | intel_state->min_cdclk[i] = min_cdclk; | |
1934 | } | |
7ff89ca2 | 1935 | |
9c61de4c | 1936 | min_cdclk = 0; |
7ff89ca2 | 1937 | for_each_pipe(dev_priv, pipe) |
d305e061 | 1938 | min_cdclk = max(intel_state->min_cdclk[pipe], min_cdclk); |
7ff89ca2 | 1939 | |
d305e061 | 1940 | return min_cdclk; |
7ff89ca2 VS |
1941 | } |
1942 | ||
53e9bf5e VS |
1943 | /* |
1944 | * Note that this functions assumes that 0 is | |
1945 | * the lowest voltage value, and higher values | |
1946 | * correspond to increasingly higher voltages. | |
1947 | * | |
1948 | * Should that relationship no longer hold on | |
1949 | * future platforms this code will need to be | |
1950 | * adjusted. | |
1951 | */ | |
1952 | static u8 cnl_compute_min_voltage_level(struct intel_atomic_state *state) | |
1953 | { | |
1954 | struct drm_i915_private *dev_priv = to_i915(state->base.dev); | |
1955 | struct intel_crtc *crtc; | |
1956 | struct intel_crtc_state *crtc_state; | |
1957 | u8 min_voltage_level; | |
1958 | int i; | |
1959 | enum pipe pipe; | |
1960 | ||
1961 | memcpy(state->min_voltage_level, dev_priv->min_voltage_level, | |
1962 | sizeof(state->min_voltage_level)); | |
1963 | ||
1964 | for_each_new_intel_crtc_in_state(state, crtc, crtc_state, i) { | |
1965 | if (crtc_state->base.enable) | |
1966 | state->min_voltage_level[i] = | |
1967 | crtc_state->min_voltage_level; | |
1968 | else | |
1969 | state->min_voltage_level[i] = 0; | |
1970 | } | |
1971 | ||
1972 | min_voltage_level = 0; | |
1973 | for_each_pipe(dev_priv, pipe) | |
1974 | min_voltage_level = max(state->min_voltage_level[pipe], | |
1975 | min_voltage_level); | |
1976 | ||
1977 | return min_voltage_level; | |
1978 | } | |
1979 | ||
7ff89ca2 VS |
1980 | static int vlv_modeset_calc_cdclk(struct drm_atomic_state *state) |
1981 | { | |
3d5dbb10 | 1982 | struct drm_i915_private *dev_priv = to_i915(state->dev); |
9c61de4c VS |
1983 | struct intel_atomic_state *intel_state = to_intel_atomic_state(state); |
1984 | int min_cdclk, cdclk; | |
bb0f4aab | 1985 | |
9c61de4c VS |
1986 | min_cdclk = intel_compute_min_cdclk(state); |
1987 | if (min_cdclk < 0) | |
1988 | return min_cdclk; | |
7ff89ca2 | 1989 | |
9c61de4c | 1990 | cdclk = vlv_calc_cdclk(dev_priv, min_cdclk); |
7ff89ca2 | 1991 | |
bb0f4aab | 1992 | intel_state->cdclk.logical.cdclk = cdclk; |
999c5766 VS |
1993 | intel_state->cdclk.logical.voltage_level = |
1994 | vlv_calc_voltage_level(dev_priv, cdclk); | |
bb0f4aab VS |
1995 | |
1996 | if (!intel_state->active_crtcs) { | |
1997 | cdclk = vlv_calc_cdclk(dev_priv, 0); | |
1998 | ||
1999 | intel_state->cdclk.actual.cdclk = cdclk; | |
999c5766 VS |
2000 | intel_state->cdclk.actual.voltage_level = |
2001 | vlv_calc_voltage_level(dev_priv, cdclk); | |
bb0f4aab VS |
2002 | } else { |
2003 | intel_state->cdclk.actual = | |
2004 | intel_state->cdclk.logical; | |
2005 | } | |
7ff89ca2 VS |
2006 | |
2007 | return 0; | |
2008 | } | |
2009 | ||
7ff89ca2 VS |
2010 | static int bdw_modeset_calc_cdclk(struct drm_atomic_state *state) |
2011 | { | |
7ff89ca2 | 2012 | struct intel_atomic_state *intel_state = to_intel_atomic_state(state); |
9c61de4c VS |
2013 | int min_cdclk, cdclk; |
2014 | ||
2015 | min_cdclk = intel_compute_min_cdclk(state); | |
2016 | if (min_cdclk < 0) | |
2017 | return min_cdclk; | |
7ff89ca2 VS |
2018 | |
2019 | /* | |
2020 | * FIXME should also account for plane ratio | |
2021 | * once 64bpp pixel formats are supported. | |
2022 | */ | |
d305e061 | 2023 | cdclk = bdw_calc_cdclk(min_cdclk); |
7ff89ca2 | 2024 | |
bb0f4aab | 2025 | intel_state->cdclk.logical.cdclk = cdclk; |
d7ffaeef VS |
2026 | intel_state->cdclk.logical.voltage_level = |
2027 | bdw_calc_voltage_level(cdclk); | |
bb0f4aab VS |
2028 | |
2029 | if (!intel_state->active_crtcs) { | |
2030 | cdclk = bdw_calc_cdclk(0); | |
2031 | ||
2032 | intel_state->cdclk.actual.cdclk = cdclk; | |
d7ffaeef VS |
2033 | intel_state->cdclk.actual.voltage_level = |
2034 | bdw_calc_voltage_level(cdclk); | |
bb0f4aab VS |
2035 | } else { |
2036 | intel_state->cdclk.actual = | |
2037 | intel_state->cdclk.logical; | |
2038 | } | |
7ff89ca2 VS |
2039 | |
2040 | return 0; | |
2041 | } | |
2042 | ||
7ff89ca2 VS |
2043 | static int skl_modeset_calc_cdclk(struct drm_atomic_state *state) |
2044 | { | |
7ff89ca2 | 2045 | struct drm_i915_private *dev_priv = to_i915(state->dev); |
9c61de4c VS |
2046 | struct intel_atomic_state *intel_state = to_intel_atomic_state(state); |
2047 | int min_cdclk, cdclk, vco; | |
2048 | ||
2049 | min_cdclk = intel_compute_min_cdclk(state); | |
2050 | if (min_cdclk < 0) | |
2051 | return min_cdclk; | |
bb0f4aab VS |
2052 | |
2053 | vco = intel_state->cdclk.logical.vco; | |
2054 | if (!vco) | |
2055 | vco = dev_priv->skl_preferred_vco_freq; | |
7ff89ca2 VS |
2056 | |
2057 | /* | |
2058 | * FIXME should also account for plane ratio | |
2059 | * once 64bpp pixel formats are supported. | |
2060 | */ | |
d305e061 | 2061 | cdclk = skl_calc_cdclk(min_cdclk, vco); |
7ff89ca2 | 2062 | |
bb0f4aab VS |
2063 | intel_state->cdclk.logical.vco = vco; |
2064 | intel_state->cdclk.logical.cdclk = cdclk; | |
2aa97491 VS |
2065 | intel_state->cdclk.logical.voltage_level = |
2066 | skl_calc_voltage_level(cdclk); | |
bb0f4aab VS |
2067 | |
2068 | if (!intel_state->active_crtcs) { | |
2069 | cdclk = skl_calc_cdclk(0, vco); | |
2070 | ||
2071 | intel_state->cdclk.actual.vco = vco; | |
2072 | intel_state->cdclk.actual.cdclk = cdclk; | |
2aa97491 VS |
2073 | intel_state->cdclk.actual.voltage_level = |
2074 | skl_calc_voltage_level(cdclk); | |
bb0f4aab VS |
2075 | } else { |
2076 | intel_state->cdclk.actual = | |
2077 | intel_state->cdclk.logical; | |
2078 | } | |
7ff89ca2 VS |
2079 | |
2080 | return 0; | |
2081 | } | |
2082 | ||
7ff89ca2 VS |
2083 | static int bxt_modeset_calc_cdclk(struct drm_atomic_state *state) |
2084 | { | |
2085 | struct drm_i915_private *dev_priv = to_i915(state->dev); | |
9c61de4c VS |
2086 | struct intel_atomic_state *intel_state = to_intel_atomic_state(state); |
2087 | int min_cdclk, cdclk, vco; | |
2088 | ||
2089 | min_cdclk = intel_compute_min_cdclk(state); | |
2090 | if (min_cdclk < 0) | |
2091 | return min_cdclk; | |
7ff89ca2 | 2092 | |
bb0f4aab | 2093 | if (IS_GEMINILAKE(dev_priv)) { |
d305e061 | 2094 | cdclk = glk_calc_cdclk(min_cdclk); |
bb0f4aab VS |
2095 | vco = glk_de_pll_vco(dev_priv, cdclk); |
2096 | } else { | |
d305e061 | 2097 | cdclk = bxt_calc_cdclk(min_cdclk); |
bb0f4aab VS |
2098 | vco = bxt_de_pll_vco(dev_priv, cdclk); |
2099 | } | |
2100 | ||
bb0f4aab VS |
2101 | intel_state->cdclk.logical.vco = vco; |
2102 | intel_state->cdclk.logical.cdclk = cdclk; | |
2123f442 VS |
2103 | intel_state->cdclk.logical.voltage_level = |
2104 | bxt_calc_voltage_level(cdclk); | |
7ff89ca2 VS |
2105 | |
2106 | if (!intel_state->active_crtcs) { | |
bb0f4aab | 2107 | if (IS_GEMINILAKE(dev_priv)) { |
7ff89ca2 | 2108 | cdclk = glk_calc_cdclk(0); |
bb0f4aab VS |
2109 | vco = glk_de_pll_vco(dev_priv, cdclk); |
2110 | } else { | |
7ff89ca2 | 2111 | cdclk = bxt_calc_cdclk(0); |
bb0f4aab VS |
2112 | vco = bxt_de_pll_vco(dev_priv, cdclk); |
2113 | } | |
7ff89ca2 | 2114 | |
bb0f4aab VS |
2115 | intel_state->cdclk.actual.vco = vco; |
2116 | intel_state->cdclk.actual.cdclk = cdclk; | |
2123f442 VS |
2117 | intel_state->cdclk.actual.voltage_level = |
2118 | bxt_calc_voltage_level(cdclk); | |
bb0f4aab VS |
2119 | } else { |
2120 | intel_state->cdclk.actual = | |
2121 | intel_state->cdclk.logical; | |
7ff89ca2 VS |
2122 | } |
2123 | ||
2124 | return 0; | |
2125 | } | |
2126 | ||
d1999e9e RV |
2127 | static int cnl_modeset_calc_cdclk(struct drm_atomic_state *state) |
2128 | { | |
2129 | struct drm_i915_private *dev_priv = to_i915(state->dev); | |
9c61de4c VS |
2130 | struct intel_atomic_state *intel_state = to_intel_atomic_state(state); |
2131 | int min_cdclk, cdclk, vco; | |
2132 | ||
2133 | min_cdclk = intel_compute_min_cdclk(state); | |
2134 | if (min_cdclk < 0) | |
2135 | return min_cdclk; | |
d1999e9e | 2136 | |
d305e061 | 2137 | cdclk = cnl_calc_cdclk(min_cdclk); |
d1999e9e RV |
2138 | vco = cnl_cdclk_pll_vco(dev_priv, cdclk); |
2139 | ||
d1999e9e RV |
2140 | intel_state->cdclk.logical.vco = vco; |
2141 | intel_state->cdclk.logical.cdclk = cdclk; | |
48469ece | 2142 | intel_state->cdclk.logical.voltage_level = |
53e9bf5e VS |
2143 | max(cnl_calc_voltage_level(cdclk), |
2144 | cnl_compute_min_voltage_level(intel_state)); | |
d1999e9e RV |
2145 | |
2146 | if (!intel_state->active_crtcs) { | |
2147 | cdclk = cnl_calc_cdclk(0); | |
2148 | vco = cnl_cdclk_pll_vco(dev_priv, cdclk); | |
2149 | ||
2150 | intel_state->cdclk.actual.vco = vco; | |
2151 | intel_state->cdclk.actual.cdclk = cdclk; | |
48469ece VS |
2152 | intel_state->cdclk.actual.voltage_level = |
2153 | cnl_calc_voltage_level(cdclk); | |
d1999e9e RV |
2154 | } else { |
2155 | intel_state->cdclk.actual = | |
2156 | intel_state->cdclk.logical; | |
2157 | } | |
2158 | ||
2159 | return 0; | |
2160 | } | |
2161 | ||
7ff89ca2 VS |
2162 | static int intel_compute_max_dotclk(struct drm_i915_private *dev_priv) |
2163 | { | |
2164 | int max_cdclk_freq = dev_priv->max_cdclk_freq; | |
2165 | ||
d305e061 VS |
2166 | if (INTEL_GEN(dev_priv) >= 10) |
2167 | /* | |
2168 | * FIXME: Allow '2 * max_cdclk_freq' | |
2169 | * once DDI clock voltage requirements are | |
2170 | * handled correctly. | |
2171 | */ | |
2172 | return max_cdclk_freq; | |
2173 | else if (IS_GEMINILAKE(dev_priv)) | |
97f55ca5 MC |
2174 | /* |
2175 | * FIXME: Limiting to 99% as a temporary workaround. See | |
d305e061 | 2176 | * intel_min_cdclk() for details. |
97f55ca5 MC |
2177 | */ |
2178 | return 2 * max_cdclk_freq * 99 / 100; | |
d305e061 VS |
2179 | else if (IS_GEN9(dev_priv) || |
2180 | IS_BROADWELL(dev_priv) || IS_HASWELL(dev_priv)) | |
7ff89ca2 VS |
2181 | return max_cdclk_freq; |
2182 | else if (IS_CHERRYVIEW(dev_priv)) | |
2183 | return max_cdclk_freq*95/100; | |
2184 | else if (INTEL_INFO(dev_priv)->gen < 4) | |
2185 | return 2*max_cdclk_freq*90/100; | |
2186 | else | |
2187 | return max_cdclk_freq*90/100; | |
2188 | } | |
2189 | ||
2190 | /** | |
2191 | * intel_update_max_cdclk - Determine the maximum support CDCLK frequency | |
2192 | * @dev_priv: i915 device | |
2193 | * | |
2194 | * Determine the maximum CDCLK frequency the platform supports, and also | |
2195 | * derive the maximum dot clock frequency the maximum CDCLK frequency | |
2196 | * allows. | |
2197 | */ | |
2198 | void intel_update_max_cdclk(struct drm_i915_private *dev_priv) | |
2199 | { | |
d1999e9e RV |
2200 | if (IS_CANNONLAKE(dev_priv)) { |
2201 | dev_priv->max_cdclk_freq = 528000; | |
2202 | } else if (IS_GEN9_BC(dev_priv)) { | |
7ff89ca2 VS |
2203 | u32 limit = I915_READ(SKL_DFSM) & SKL_DFSM_CDCLK_LIMIT_MASK; |
2204 | int max_cdclk, vco; | |
2205 | ||
2206 | vco = dev_priv->skl_preferred_vco_freq; | |
2207 | WARN_ON(vco != 8100000 && vco != 8640000); | |
2208 | ||
2209 | /* | |
2210 | * Use the lower (vco 8640) cdclk values as a | |
2211 | * first guess. skl_calc_cdclk() will correct it | |
2212 | * if the preferred vco is 8100 instead. | |
2213 | */ | |
2214 | if (limit == SKL_DFSM_CDCLK_LIMIT_675) | |
2215 | max_cdclk = 617143; | |
2216 | else if (limit == SKL_DFSM_CDCLK_LIMIT_540) | |
2217 | max_cdclk = 540000; | |
2218 | else if (limit == SKL_DFSM_CDCLK_LIMIT_450) | |
2219 | max_cdclk = 432000; | |
2220 | else | |
2221 | max_cdclk = 308571; | |
2222 | ||
2223 | dev_priv->max_cdclk_freq = skl_calc_cdclk(max_cdclk, vco); | |
2224 | } else if (IS_GEMINILAKE(dev_priv)) { | |
2225 | dev_priv->max_cdclk_freq = 316800; | |
2226 | } else if (IS_BROXTON(dev_priv)) { | |
2227 | dev_priv->max_cdclk_freq = 624000; | |
2228 | } else if (IS_BROADWELL(dev_priv)) { | |
2229 | /* | |
2230 | * FIXME with extra cooling we can allow | |
2231 | * 540 MHz for ULX and 675 Mhz for ULT. | |
2232 | * How can we know if extra cooling is | |
2233 | * available? PCI ID, VTB, something else? | |
2234 | */ | |
2235 | if (I915_READ(FUSE_STRAP) & HSW_CDCLK_LIMIT) | |
2236 | dev_priv->max_cdclk_freq = 450000; | |
2237 | else if (IS_BDW_ULX(dev_priv)) | |
2238 | dev_priv->max_cdclk_freq = 450000; | |
2239 | else if (IS_BDW_ULT(dev_priv)) | |
2240 | dev_priv->max_cdclk_freq = 540000; | |
2241 | else | |
2242 | dev_priv->max_cdclk_freq = 675000; | |
2243 | } else if (IS_CHERRYVIEW(dev_priv)) { | |
2244 | dev_priv->max_cdclk_freq = 320000; | |
2245 | } else if (IS_VALLEYVIEW(dev_priv)) { | |
2246 | dev_priv->max_cdclk_freq = 400000; | |
2247 | } else { | |
2248 | /* otherwise assume cdclk is fixed */ | |
49cd97a3 | 2249 | dev_priv->max_cdclk_freq = dev_priv->cdclk.hw.cdclk; |
7ff89ca2 VS |
2250 | } |
2251 | ||
2252 | dev_priv->max_dotclk_freq = intel_compute_max_dotclk(dev_priv); | |
2253 | ||
2254 | DRM_DEBUG_DRIVER("Max CD clock rate: %d kHz\n", | |
2255 | dev_priv->max_cdclk_freq); | |
2256 | ||
2257 | DRM_DEBUG_DRIVER("Max dotclock rate: %d kHz\n", | |
2258 | dev_priv->max_dotclk_freq); | |
2259 | } | |
2260 | ||
2261 | /** | |
2262 | * intel_update_cdclk - Determine the current CDCLK frequency | |
2263 | * @dev_priv: i915 device | |
2264 | * | |
2265 | * Determine the current CDCLK frequency. | |
2266 | */ | |
2267 | void intel_update_cdclk(struct drm_i915_private *dev_priv) | |
2268 | { | |
49cd97a3 | 2269 | dev_priv->display.get_cdclk(dev_priv, &dev_priv->cdclk.hw); |
7ff89ca2 | 2270 | |
49cd97a3 VS |
2271 | DRM_DEBUG_DRIVER("Current CD clock rate: %d kHz, VCO: %d kHz, ref: %d kHz\n", |
2272 | dev_priv->cdclk.hw.cdclk, dev_priv->cdclk.hw.vco, | |
2273 | dev_priv->cdclk.hw.ref); | |
7ff89ca2 VS |
2274 | |
2275 | /* | |
2276 | * 9:0 CMBUS [sic] CDCLK frequency (cdfreq): | |
2277 | * Programmng [sic] note: bit[9:2] should be programmed to the number | |
2278 | * of cdclk that generates 4MHz reference clock freq which is used to | |
2279 | * generate GMBus clock. This will vary with the cdclk freq. | |
2280 | */ | |
2281 | if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) | |
2282 | I915_WRITE(GMBUSFREQ_VLV, | |
49cd97a3 | 2283 | DIV_ROUND_UP(dev_priv->cdclk.hw.cdclk, 1000)); |
7ff89ca2 VS |
2284 | } |
2285 | ||
9d81a997 RV |
2286 | static int cnp_rawclk(struct drm_i915_private *dev_priv) |
2287 | { | |
2288 | u32 rawclk; | |
2289 | int divider, fraction; | |
2290 | ||
2291 | if (I915_READ(SFUSE_STRAP) & SFUSE_STRAP_RAW_FREQUENCY) { | |
2292 | /* 24 MHz */ | |
2293 | divider = 24000; | |
2294 | fraction = 0; | |
2295 | } else { | |
2296 | /* 19.2 MHz */ | |
2297 | divider = 19000; | |
2298 | fraction = 200; | |
2299 | } | |
2300 | ||
2301 | rawclk = CNP_RAWCLK_DIV((divider / 1000) - 1); | |
2302 | if (fraction) | |
2303 | rawclk |= CNP_RAWCLK_FRAC(DIV_ROUND_CLOSEST(1000, | |
2304 | fraction) - 1); | |
2305 | ||
2306 | I915_WRITE(PCH_RAWCLK_FREQ, rawclk); | |
2307 | return divider + fraction; | |
2308 | } | |
2309 | ||
7ff89ca2 VS |
2310 | static int pch_rawclk(struct drm_i915_private *dev_priv) |
2311 | { | |
2312 | return (I915_READ(PCH_RAWCLK_FREQ) & RAWCLK_FREQ_MASK) * 1000; | |
2313 | } | |
2314 | ||
2315 | static int vlv_hrawclk(struct drm_i915_private *dev_priv) | |
2316 | { | |
2317 | /* RAWCLK_FREQ_VLV register updated from power well code */ | |
2318 | return vlv_get_cck_clock_hpll(dev_priv, "hrawclk", | |
2319 | CCK_DISPLAY_REF_CLOCK_CONTROL); | |
2320 | } | |
2321 | ||
2322 | static int g4x_hrawclk(struct drm_i915_private *dev_priv) | |
2323 | { | |
2324 | uint32_t clkcfg; | |
2325 | ||
2326 | /* hrawclock is 1/4 the FSB frequency */ | |
2327 | clkcfg = I915_READ(CLKCFG); | |
2328 | switch (clkcfg & CLKCFG_FSB_MASK) { | |
2329 | case CLKCFG_FSB_400: | |
2330 | return 100000; | |
2331 | case CLKCFG_FSB_533: | |
2332 | return 133333; | |
2333 | case CLKCFG_FSB_667: | |
2334 | return 166667; | |
2335 | case CLKCFG_FSB_800: | |
2336 | return 200000; | |
2337 | case CLKCFG_FSB_1067: | |
6f38123e | 2338 | case CLKCFG_FSB_1067_ALT: |
7ff89ca2 VS |
2339 | return 266667; |
2340 | case CLKCFG_FSB_1333: | |
6f38123e | 2341 | case CLKCFG_FSB_1333_ALT: |
7ff89ca2 | 2342 | return 333333; |
7ff89ca2 VS |
2343 | default: |
2344 | return 133333; | |
2345 | } | |
2346 | } | |
2347 | ||
2348 | /** | |
2349 | * intel_update_rawclk - Determine the current RAWCLK frequency | |
2350 | * @dev_priv: i915 device | |
2351 | * | |
2352 | * Determine the current RAWCLK frequency. RAWCLK is a fixed | |
2353 | * frequency clock so this needs to done only once. | |
2354 | */ | |
2355 | void intel_update_rawclk(struct drm_i915_private *dev_priv) | |
2356 | { | |
9d81a997 RV |
2357 | |
2358 | if (HAS_PCH_CNP(dev_priv)) | |
2359 | dev_priv->rawclk_freq = cnp_rawclk(dev_priv); | |
2360 | else if (HAS_PCH_SPLIT(dev_priv)) | |
7ff89ca2 VS |
2361 | dev_priv->rawclk_freq = pch_rawclk(dev_priv); |
2362 | else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) | |
2363 | dev_priv->rawclk_freq = vlv_hrawclk(dev_priv); | |
2364 | else if (IS_G4X(dev_priv) || IS_PINEVIEW(dev_priv)) | |
2365 | dev_priv->rawclk_freq = g4x_hrawclk(dev_priv); | |
2366 | else | |
2367 | /* no rawclk on other platforms, or no need to know it */ | |
2368 | return; | |
2369 | ||
2370 | DRM_DEBUG_DRIVER("rawclk rate: %d kHz\n", dev_priv->rawclk_freq); | |
2371 | } | |
2372 | ||
2373 | /** | |
2374 | * intel_init_cdclk_hooks - Initialize CDCLK related modesetting hooks | |
2375 | * @dev_priv: i915 device | |
2376 | */ | |
2377 | void intel_init_cdclk_hooks(struct drm_i915_private *dev_priv) | |
2378 | { | |
b0587e4d VS |
2379 | if (IS_CHERRYVIEW(dev_priv)) { |
2380 | dev_priv->display.set_cdclk = chv_set_cdclk; | |
2381 | dev_priv->display.modeset_calc_cdclk = | |
2382 | vlv_modeset_calc_cdclk; | |
2383 | } else if (IS_VALLEYVIEW(dev_priv)) { | |
2384 | dev_priv->display.set_cdclk = vlv_set_cdclk; | |
7ff89ca2 VS |
2385 | dev_priv->display.modeset_calc_cdclk = |
2386 | vlv_modeset_calc_cdclk; | |
2387 | } else if (IS_BROADWELL(dev_priv)) { | |
b0587e4d | 2388 | dev_priv->display.set_cdclk = bdw_set_cdclk; |
7ff89ca2 VS |
2389 | dev_priv->display.modeset_calc_cdclk = |
2390 | bdw_modeset_calc_cdclk; | |
2391 | } else if (IS_GEN9_LP(dev_priv)) { | |
b0587e4d | 2392 | dev_priv->display.set_cdclk = bxt_set_cdclk; |
7ff89ca2 VS |
2393 | dev_priv->display.modeset_calc_cdclk = |
2394 | bxt_modeset_calc_cdclk; | |
2395 | } else if (IS_GEN9_BC(dev_priv)) { | |
b0587e4d | 2396 | dev_priv->display.set_cdclk = skl_set_cdclk; |
7ff89ca2 VS |
2397 | dev_priv->display.modeset_calc_cdclk = |
2398 | skl_modeset_calc_cdclk; | |
d1999e9e RV |
2399 | } else if (IS_CANNONLAKE(dev_priv)) { |
2400 | dev_priv->display.set_cdclk = cnl_set_cdclk; | |
2401 | dev_priv->display.modeset_calc_cdclk = | |
2402 | cnl_modeset_calc_cdclk; | |
7ff89ca2 VS |
2403 | } |
2404 | ||
945f2672 VS |
2405 | if (IS_CANNONLAKE(dev_priv)) |
2406 | dev_priv->display.get_cdclk = cnl_get_cdclk; | |
2407 | else if (IS_GEN9_BC(dev_priv)) | |
7ff89ca2 VS |
2408 | dev_priv->display.get_cdclk = skl_get_cdclk; |
2409 | else if (IS_GEN9_LP(dev_priv)) | |
2410 | dev_priv->display.get_cdclk = bxt_get_cdclk; | |
2411 | else if (IS_BROADWELL(dev_priv)) | |
2412 | dev_priv->display.get_cdclk = bdw_get_cdclk; | |
2413 | else if (IS_HASWELL(dev_priv)) | |
2414 | dev_priv->display.get_cdclk = hsw_get_cdclk; | |
2415 | else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) | |
2416 | dev_priv->display.get_cdclk = vlv_get_cdclk; | |
2417 | else if (IS_GEN6(dev_priv) || IS_IVYBRIDGE(dev_priv)) | |
2418 | dev_priv->display.get_cdclk = fixed_400mhz_get_cdclk; | |
2419 | else if (IS_GEN5(dev_priv)) | |
2420 | dev_priv->display.get_cdclk = fixed_450mhz_get_cdclk; | |
2421 | else if (IS_GM45(dev_priv)) | |
2422 | dev_priv->display.get_cdclk = gm45_get_cdclk; | |
6b9e441d | 2423 | else if (IS_G45(dev_priv)) |
7ff89ca2 VS |
2424 | dev_priv->display.get_cdclk = g33_get_cdclk; |
2425 | else if (IS_I965GM(dev_priv)) | |
2426 | dev_priv->display.get_cdclk = i965gm_get_cdclk; | |
2427 | else if (IS_I965G(dev_priv)) | |
2428 | dev_priv->display.get_cdclk = fixed_400mhz_get_cdclk; | |
2429 | else if (IS_PINEVIEW(dev_priv)) | |
2430 | dev_priv->display.get_cdclk = pnv_get_cdclk; | |
2431 | else if (IS_G33(dev_priv)) | |
2432 | dev_priv->display.get_cdclk = g33_get_cdclk; | |
2433 | else if (IS_I945GM(dev_priv)) | |
2434 | dev_priv->display.get_cdclk = i945gm_get_cdclk; | |
2435 | else if (IS_I945G(dev_priv)) | |
2436 | dev_priv->display.get_cdclk = fixed_400mhz_get_cdclk; | |
2437 | else if (IS_I915GM(dev_priv)) | |
2438 | dev_priv->display.get_cdclk = i915gm_get_cdclk; | |
2439 | else if (IS_I915G(dev_priv)) | |
2440 | dev_priv->display.get_cdclk = fixed_333mhz_get_cdclk; | |
2441 | else if (IS_I865G(dev_priv)) | |
2442 | dev_priv->display.get_cdclk = fixed_266mhz_get_cdclk; | |
2443 | else if (IS_I85X(dev_priv)) | |
2444 | dev_priv->display.get_cdclk = i85x_get_cdclk; | |
2445 | else if (IS_I845G(dev_priv)) | |
2446 | dev_priv->display.get_cdclk = fixed_200mhz_get_cdclk; | |
2447 | else { /* 830 */ | |
2448 | WARN(!IS_I830(dev_priv), | |
2449 | "Unknown platform. Assuming 133 MHz CDCLK\n"); | |
2450 | dev_priv->display.get_cdclk = fixed_133mhz_get_cdclk; | |
2451 | } | |
2452 | } |