Commit | Line | Data |
---|---|---|
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 | |
0c9f353f VS |
523 | switch (cdclk) { |
524 | case 400000: | |
525 | case 333333: | |
526 | case 320000: | |
527 | case 266667: | |
528 | case 200000: | |
529 | break; | |
530 | default: | |
531 | MISSING_CASE(cdclk); | |
532 | return; | |
533 | } | |
534 | ||
886015a0 GKB |
535 | /* There are cases where we can end up here with power domains |
536 | * off and a CDCLK frequency other than the minimum, like when | |
537 | * issuing a modeset without actually changing any display after | |
538 | * a system suspend. So grab the PIPE-A domain, which covers | |
539 | * the HW blocks needed for the following programming. | |
540 | */ | |
541 | intel_display_power_get(dev_priv, POWER_DOMAIN_PIPE_A); | |
542 | ||
9f817501 | 543 | mutex_lock(&dev_priv->pcu_lock); |
7ff89ca2 VS |
544 | val = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ); |
545 | val &= ~DSPFREQGUAR_MASK; | |
546 | val |= (cmd << DSPFREQGUAR_SHIFT); | |
547 | vlv_punit_write(dev_priv, PUNIT_REG_DSPFREQ, val); | |
548 | if (wait_for((vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) & | |
549 | DSPFREQSTAT_MASK) == (cmd << DSPFREQSTAT_SHIFT), | |
550 | 50)) { | |
551 | DRM_ERROR("timed out waiting for CDclk change\n"); | |
552 | } | |
9f817501 | 553 | mutex_unlock(&dev_priv->pcu_lock); |
7ff89ca2 VS |
554 | |
555 | mutex_lock(&dev_priv->sb_lock); | |
556 | ||
557 | if (cdclk == 400000) { | |
558 | u32 divider; | |
559 | ||
560 | divider = DIV_ROUND_CLOSEST(dev_priv->hpll_freq << 1, | |
561 | cdclk) - 1; | |
562 | ||
563 | /* adjust cdclk divider */ | |
564 | val = vlv_cck_read(dev_priv, CCK_DISPLAY_CLOCK_CONTROL); | |
565 | val &= ~CCK_FREQUENCY_VALUES; | |
566 | val |= divider; | |
567 | vlv_cck_write(dev_priv, CCK_DISPLAY_CLOCK_CONTROL, val); | |
568 | ||
569 | if (wait_for((vlv_cck_read(dev_priv, CCK_DISPLAY_CLOCK_CONTROL) & | |
570 | CCK_FREQUENCY_STATUS) == (divider << CCK_FREQUENCY_STATUS_SHIFT), | |
571 | 50)) | |
572 | DRM_ERROR("timed out waiting for CDclk change\n"); | |
573 | } | |
574 | ||
575 | /* adjust self-refresh exit latency value */ | |
576 | val = vlv_bunit_read(dev_priv, BUNIT_REG_BISOC); | |
577 | val &= ~0x7f; | |
578 | ||
579 | /* | |
580 | * For high bandwidth configs, we set a higher latency in the bunit | |
581 | * so that the core display fetch happens in time to avoid underruns. | |
582 | */ | |
583 | if (cdclk == 400000) | |
584 | val |= 4500 / 250; /* 4.5 usec */ | |
585 | else | |
586 | val |= 3000 / 250; /* 3.0 usec */ | |
587 | vlv_bunit_write(dev_priv, BUNIT_REG_BISOC, val); | |
588 | ||
589 | mutex_unlock(&dev_priv->sb_lock); | |
590 | ||
591 | intel_update_cdclk(dev_priv); | |
1a5301a5 VS |
592 | |
593 | vlv_program_pfi_credits(dev_priv); | |
886015a0 GKB |
594 | |
595 | intel_display_power_put(dev_priv, POWER_DOMAIN_PIPE_A); | |
7ff89ca2 VS |
596 | } |
597 | ||
83c5fda7 VS |
598 | static void chv_set_cdclk(struct drm_i915_private *dev_priv, |
599 | const struct intel_cdclk_state *cdclk_state) | |
7ff89ca2 | 600 | { |
83c5fda7 | 601 | int cdclk = cdclk_state->cdclk; |
999c5766 | 602 | u32 val, cmd = cdclk_state->voltage_level; |
7ff89ca2 | 603 | |
7ff89ca2 VS |
604 | switch (cdclk) { |
605 | case 333333: | |
606 | case 320000: | |
607 | case 266667: | |
608 | case 200000: | |
609 | break; | |
610 | default: | |
611 | MISSING_CASE(cdclk); | |
612 | return; | |
613 | } | |
614 | ||
886015a0 GKB |
615 | /* There are cases where we can end up here with power domains |
616 | * off and a CDCLK frequency other than the minimum, like when | |
617 | * issuing a modeset without actually changing any display after | |
618 | * a system suspend. So grab the PIPE-A domain, which covers | |
619 | * the HW blocks needed for the following programming. | |
620 | */ | |
621 | intel_display_power_get(dev_priv, POWER_DOMAIN_PIPE_A); | |
622 | ||
9f817501 | 623 | mutex_lock(&dev_priv->pcu_lock); |
7ff89ca2 VS |
624 | val = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ); |
625 | val &= ~DSPFREQGUAR_MASK_CHV; | |
626 | val |= (cmd << DSPFREQGUAR_SHIFT_CHV); | |
627 | vlv_punit_write(dev_priv, PUNIT_REG_DSPFREQ, val); | |
628 | if (wait_for((vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) & | |
629 | DSPFREQSTAT_MASK_CHV) == (cmd << DSPFREQSTAT_SHIFT_CHV), | |
630 | 50)) { | |
631 | DRM_ERROR("timed out waiting for CDclk change\n"); | |
632 | } | |
9f817501 | 633 | mutex_unlock(&dev_priv->pcu_lock); |
7ff89ca2 VS |
634 | |
635 | intel_update_cdclk(dev_priv); | |
1a5301a5 VS |
636 | |
637 | vlv_program_pfi_credits(dev_priv); | |
886015a0 GKB |
638 | |
639 | intel_display_power_put(dev_priv, POWER_DOMAIN_PIPE_A); | |
7ff89ca2 VS |
640 | } |
641 | ||
d305e061 | 642 | static int bdw_calc_cdclk(int min_cdclk) |
7ff89ca2 | 643 | { |
d305e061 | 644 | if (min_cdclk > 540000) |
7ff89ca2 | 645 | return 675000; |
d305e061 | 646 | else if (min_cdclk > 450000) |
7ff89ca2 | 647 | return 540000; |
d305e061 | 648 | else if (min_cdclk > 337500) |
7ff89ca2 VS |
649 | return 450000; |
650 | else | |
651 | return 337500; | |
652 | } | |
653 | ||
d7ffaeef VS |
654 | static u8 bdw_calc_voltage_level(int cdclk) |
655 | { | |
656 | switch (cdclk) { | |
657 | default: | |
658 | case 337500: | |
659 | return 2; | |
660 | case 450000: | |
661 | return 0; | |
662 | case 540000: | |
663 | return 1; | |
664 | case 675000: | |
665 | return 3; | |
666 | } | |
667 | } | |
668 | ||
49cd97a3 VS |
669 | static void bdw_get_cdclk(struct drm_i915_private *dev_priv, |
670 | struct intel_cdclk_state *cdclk_state) | |
7ff89ca2 VS |
671 | { |
672 | uint32_t lcpll = I915_READ(LCPLL_CTL); | |
673 | uint32_t freq = lcpll & LCPLL_CLK_FREQ_MASK; | |
674 | ||
675 | if (lcpll & LCPLL_CD_SOURCE_FCLK) | |
49cd97a3 | 676 | cdclk_state->cdclk = 800000; |
7ff89ca2 | 677 | else if (I915_READ(FUSE_STRAP) & HSW_CDCLK_LIMIT) |
49cd97a3 | 678 | cdclk_state->cdclk = 450000; |
7ff89ca2 | 679 | else if (freq == LCPLL_CLK_FREQ_450) |
49cd97a3 | 680 | cdclk_state->cdclk = 450000; |
7ff89ca2 | 681 | else if (freq == LCPLL_CLK_FREQ_54O_BDW) |
49cd97a3 | 682 | cdclk_state->cdclk = 540000; |
7ff89ca2 | 683 | else if (freq == LCPLL_CLK_FREQ_337_5_BDW) |
49cd97a3 | 684 | cdclk_state->cdclk = 337500; |
7ff89ca2 | 685 | else |
49cd97a3 | 686 | cdclk_state->cdclk = 675000; |
d7ffaeef VS |
687 | |
688 | /* | |
689 | * Can't read this out :( Let's assume it's | |
690 | * at least what the CDCLK frequency requires. | |
691 | */ | |
692 | cdclk_state->voltage_level = | |
693 | bdw_calc_voltage_level(cdclk_state->cdclk); | |
7ff89ca2 VS |
694 | } |
695 | ||
83c5fda7 VS |
696 | static void bdw_set_cdclk(struct drm_i915_private *dev_priv, |
697 | const struct intel_cdclk_state *cdclk_state) | |
7ff89ca2 | 698 | { |
83c5fda7 | 699 | int cdclk = cdclk_state->cdclk; |
d7ffaeef | 700 | uint32_t val; |
7ff89ca2 VS |
701 | int ret; |
702 | ||
703 | if (WARN((I915_READ(LCPLL_CTL) & | |
704 | (LCPLL_PLL_DISABLE | LCPLL_PLL_LOCK | | |
705 | LCPLL_CD_CLOCK_DISABLE | LCPLL_ROOT_CD_CLOCK_DISABLE | | |
706 | LCPLL_CD2X_CLOCK_DISABLE | LCPLL_POWER_DOWN_ALLOW | | |
707 | LCPLL_CD_SOURCE_FCLK)) != LCPLL_PLL_LOCK, | |
708 | "trying to change cdclk frequency with cdclk not enabled\n")) | |
709 | return; | |
710 | ||
9f817501 | 711 | mutex_lock(&dev_priv->pcu_lock); |
7ff89ca2 VS |
712 | ret = sandybridge_pcode_write(dev_priv, |
713 | BDW_PCODE_DISPLAY_FREQ_CHANGE_REQ, 0x0); | |
9f817501 | 714 | mutex_unlock(&dev_priv->pcu_lock); |
7ff89ca2 VS |
715 | if (ret) { |
716 | DRM_ERROR("failed to inform pcode about cdclk change\n"); | |
717 | return; | |
718 | } | |
719 | ||
720 | val = I915_READ(LCPLL_CTL); | |
721 | val |= LCPLL_CD_SOURCE_FCLK; | |
722 | I915_WRITE(LCPLL_CTL, val); | |
723 | ||
3164888a ML |
724 | /* |
725 | * According to the spec, it should be enough to poll for this 1 us. | |
726 | * However, extensive testing shows that this can take longer. | |
727 | */ | |
7ff89ca2 | 728 | if (wait_for_us(I915_READ(LCPLL_CTL) & |
3164888a | 729 | LCPLL_CD_SOURCE_FCLK_DONE, 100)) |
7ff89ca2 VS |
730 | DRM_ERROR("Switching to FCLK failed\n"); |
731 | ||
732 | val = I915_READ(LCPLL_CTL); | |
733 | val &= ~LCPLL_CLK_FREQ_MASK; | |
734 | ||
735 | switch (cdclk) { | |
2b58417f VS |
736 | default: |
737 | MISSING_CASE(cdclk); | |
738 | /* fall through */ | |
739 | case 337500: | |
740 | val |= LCPLL_CLK_FREQ_337_5_BDW; | |
2b58417f | 741 | break; |
7ff89ca2 VS |
742 | case 450000: |
743 | val |= LCPLL_CLK_FREQ_450; | |
7ff89ca2 VS |
744 | break; |
745 | case 540000: | |
746 | val |= LCPLL_CLK_FREQ_54O_BDW; | |
7ff89ca2 | 747 | break; |
7ff89ca2 VS |
748 | case 675000: |
749 | val |= LCPLL_CLK_FREQ_675_BDW; | |
7ff89ca2 | 750 | break; |
7ff89ca2 VS |
751 | } |
752 | ||
753 | I915_WRITE(LCPLL_CTL, val); | |
754 | ||
755 | val = I915_READ(LCPLL_CTL); | |
756 | val &= ~LCPLL_CD_SOURCE_FCLK; | |
757 | I915_WRITE(LCPLL_CTL, val); | |
758 | ||
759 | if (wait_for_us((I915_READ(LCPLL_CTL) & | |
760 | LCPLL_CD_SOURCE_FCLK_DONE) == 0, 1)) | |
761 | DRM_ERROR("Switching back to LCPLL failed\n"); | |
762 | ||
9f817501 | 763 | mutex_lock(&dev_priv->pcu_lock); |
d7ffaeef VS |
764 | sandybridge_pcode_write(dev_priv, HSW_PCODE_DE_WRITE_FREQ_REQ, |
765 | cdclk_state->voltage_level); | |
9f817501 | 766 | mutex_unlock(&dev_priv->pcu_lock); |
7ff89ca2 VS |
767 | |
768 | I915_WRITE(CDCLK_FREQ, DIV_ROUND_CLOSEST(cdclk, 1000) - 1); | |
769 | ||
770 | intel_update_cdclk(dev_priv); | |
7ff89ca2 VS |
771 | } |
772 | ||
d305e061 | 773 | static int skl_calc_cdclk(int min_cdclk, int vco) |
7ff89ca2 VS |
774 | { |
775 | if (vco == 8640000) { | |
d305e061 | 776 | if (min_cdclk > 540000) |
7ff89ca2 | 777 | return 617143; |
d305e061 | 778 | else if (min_cdclk > 432000) |
7ff89ca2 | 779 | return 540000; |
d305e061 | 780 | else if (min_cdclk > 308571) |
7ff89ca2 VS |
781 | return 432000; |
782 | else | |
783 | return 308571; | |
784 | } else { | |
d305e061 | 785 | if (min_cdclk > 540000) |
7ff89ca2 | 786 | return 675000; |
d305e061 | 787 | else if (min_cdclk > 450000) |
7ff89ca2 | 788 | return 540000; |
d305e061 | 789 | else if (min_cdclk > 337500) |
7ff89ca2 VS |
790 | return 450000; |
791 | else | |
792 | return 337500; | |
793 | } | |
794 | } | |
795 | ||
2aa97491 VS |
796 | static u8 skl_calc_voltage_level(int cdclk) |
797 | { | |
798 | switch (cdclk) { | |
799 | default: | |
800 | case 308571: | |
801 | case 337500: | |
802 | return 0; | |
803 | case 450000: | |
804 | case 432000: | |
805 | return 1; | |
806 | case 540000: | |
807 | return 2; | |
808 | case 617143: | |
809 | case 675000: | |
810 | return 3; | |
811 | } | |
812 | } | |
813 | ||
49cd97a3 VS |
814 | static void skl_dpll0_update(struct drm_i915_private *dev_priv, |
815 | struct intel_cdclk_state *cdclk_state) | |
7ff89ca2 VS |
816 | { |
817 | u32 val; | |
818 | ||
49cd97a3 VS |
819 | cdclk_state->ref = 24000; |
820 | cdclk_state->vco = 0; | |
7ff89ca2 VS |
821 | |
822 | val = I915_READ(LCPLL1_CTL); | |
823 | if ((val & LCPLL_PLL_ENABLE) == 0) | |
824 | return; | |
825 | ||
826 | if (WARN_ON((val & LCPLL_PLL_LOCK) == 0)) | |
827 | return; | |
828 | ||
829 | val = I915_READ(DPLL_CTRL1); | |
830 | ||
831 | if (WARN_ON((val & (DPLL_CTRL1_HDMI_MODE(SKL_DPLL0) | | |
832 | DPLL_CTRL1_SSC(SKL_DPLL0) | | |
833 | DPLL_CTRL1_OVERRIDE(SKL_DPLL0))) != | |
834 | DPLL_CTRL1_OVERRIDE(SKL_DPLL0))) | |
835 | return; | |
836 | ||
837 | switch (val & DPLL_CTRL1_LINK_RATE_MASK(SKL_DPLL0)) { | |
838 | case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_810, SKL_DPLL0): | |
839 | case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1350, SKL_DPLL0): | |
840 | case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1620, SKL_DPLL0): | |
841 | case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_2700, SKL_DPLL0): | |
49cd97a3 | 842 | cdclk_state->vco = 8100000; |
7ff89ca2 VS |
843 | break; |
844 | case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1080, SKL_DPLL0): | |
845 | case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_2160, SKL_DPLL0): | |
49cd97a3 | 846 | cdclk_state->vco = 8640000; |
7ff89ca2 VS |
847 | break; |
848 | default: | |
849 | MISSING_CASE(val & DPLL_CTRL1_LINK_RATE_MASK(SKL_DPLL0)); | |
850 | break; | |
851 | } | |
852 | } | |
853 | ||
49cd97a3 VS |
854 | static void skl_get_cdclk(struct drm_i915_private *dev_priv, |
855 | struct intel_cdclk_state *cdclk_state) | |
7ff89ca2 VS |
856 | { |
857 | u32 cdctl; | |
858 | ||
49cd97a3 | 859 | skl_dpll0_update(dev_priv, cdclk_state); |
7ff89ca2 | 860 | |
b6c51c3e | 861 | cdclk_state->cdclk = cdclk_state->bypass = cdclk_state->ref; |
49cd97a3 VS |
862 | |
863 | if (cdclk_state->vco == 0) | |
2aa97491 | 864 | goto out; |
7ff89ca2 VS |
865 | |
866 | cdctl = I915_READ(CDCLK_CTL); | |
867 | ||
49cd97a3 | 868 | if (cdclk_state->vco == 8640000) { |
7ff89ca2 VS |
869 | switch (cdctl & CDCLK_FREQ_SEL_MASK) { |
870 | case CDCLK_FREQ_450_432: | |
49cd97a3 VS |
871 | cdclk_state->cdclk = 432000; |
872 | break; | |
7ff89ca2 | 873 | case CDCLK_FREQ_337_308: |
49cd97a3 VS |
874 | cdclk_state->cdclk = 308571; |
875 | break; | |
7ff89ca2 | 876 | case CDCLK_FREQ_540: |
49cd97a3 VS |
877 | cdclk_state->cdclk = 540000; |
878 | break; | |
7ff89ca2 | 879 | case CDCLK_FREQ_675_617: |
49cd97a3 VS |
880 | cdclk_state->cdclk = 617143; |
881 | break; | |
7ff89ca2 VS |
882 | default: |
883 | MISSING_CASE(cdctl & CDCLK_FREQ_SEL_MASK); | |
49cd97a3 | 884 | break; |
7ff89ca2 VS |
885 | } |
886 | } else { | |
887 | switch (cdctl & CDCLK_FREQ_SEL_MASK) { | |
888 | case CDCLK_FREQ_450_432: | |
49cd97a3 VS |
889 | cdclk_state->cdclk = 450000; |
890 | break; | |
7ff89ca2 | 891 | case CDCLK_FREQ_337_308: |
49cd97a3 VS |
892 | cdclk_state->cdclk = 337500; |
893 | break; | |
7ff89ca2 | 894 | case CDCLK_FREQ_540: |
49cd97a3 VS |
895 | cdclk_state->cdclk = 540000; |
896 | break; | |
7ff89ca2 | 897 | case CDCLK_FREQ_675_617: |
49cd97a3 VS |
898 | cdclk_state->cdclk = 675000; |
899 | break; | |
7ff89ca2 VS |
900 | default: |
901 | MISSING_CASE(cdctl & CDCLK_FREQ_SEL_MASK); | |
49cd97a3 | 902 | break; |
7ff89ca2 VS |
903 | } |
904 | } | |
2aa97491 VS |
905 | |
906 | out: | |
907 | /* | |
908 | * Can't read this out :( Let's assume it's | |
909 | * at least what the CDCLK frequency requires. | |
910 | */ | |
911 | cdclk_state->voltage_level = | |
912 | skl_calc_voltage_level(cdclk_state->cdclk); | |
7ff89ca2 VS |
913 | } |
914 | ||
915 | /* convert from kHz to .1 fixpoint MHz with -1MHz offset */ | |
916 | static int skl_cdclk_decimal(int cdclk) | |
917 | { | |
918 | return DIV_ROUND_CLOSEST(cdclk - 1000, 500); | |
919 | } | |
920 | ||
921 | static void skl_set_preferred_cdclk_vco(struct drm_i915_private *dev_priv, | |
922 | int vco) | |
923 | { | |
924 | bool changed = dev_priv->skl_preferred_vco_freq != vco; | |
925 | ||
926 | dev_priv->skl_preferred_vco_freq = vco; | |
927 | ||
928 | if (changed) | |
929 | intel_update_max_cdclk(dev_priv); | |
930 | } | |
931 | ||
932 | static void skl_dpll0_enable(struct drm_i915_private *dev_priv, int vco) | |
933 | { | |
7ff89ca2 VS |
934 | u32 val; |
935 | ||
936 | WARN_ON(vco != 8100000 && vco != 8640000); | |
937 | ||
7ff89ca2 VS |
938 | /* |
939 | * We always enable DPLL0 with the lowest link rate possible, but still | |
940 | * taking into account the VCO required to operate the eDP panel at the | |
941 | * desired frequency. The usual DP link rates operate with a VCO of | |
942 | * 8100 while the eDP 1.4 alternate link rates need a VCO of 8640. | |
943 | * The modeset code is responsible for the selection of the exact link | |
944 | * rate later on, with the constraint of choosing a frequency that | |
945 | * works with vco. | |
946 | */ | |
947 | val = I915_READ(DPLL_CTRL1); | |
948 | ||
949 | val &= ~(DPLL_CTRL1_HDMI_MODE(SKL_DPLL0) | DPLL_CTRL1_SSC(SKL_DPLL0) | | |
950 | DPLL_CTRL1_LINK_RATE_MASK(SKL_DPLL0)); | |
951 | val |= DPLL_CTRL1_OVERRIDE(SKL_DPLL0); | |
952 | if (vco == 8640000) | |
953 | val |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1080, | |
954 | SKL_DPLL0); | |
955 | else | |
956 | val |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_810, | |
957 | SKL_DPLL0); | |
958 | ||
959 | I915_WRITE(DPLL_CTRL1, val); | |
960 | POSTING_READ(DPLL_CTRL1); | |
961 | ||
962 | I915_WRITE(LCPLL1_CTL, I915_READ(LCPLL1_CTL) | LCPLL_PLL_ENABLE); | |
963 | ||
964 | if (intel_wait_for_register(dev_priv, | |
965 | LCPLL1_CTL, LCPLL_PLL_LOCK, LCPLL_PLL_LOCK, | |
966 | 5)) | |
967 | DRM_ERROR("DPLL0 not locked\n"); | |
968 | ||
49cd97a3 | 969 | dev_priv->cdclk.hw.vco = vco; |
7ff89ca2 VS |
970 | |
971 | /* We'll want to keep using the current vco from now on. */ | |
972 | skl_set_preferred_cdclk_vco(dev_priv, vco); | |
973 | } | |
974 | ||
975 | static void skl_dpll0_disable(struct drm_i915_private *dev_priv) | |
976 | { | |
977 | I915_WRITE(LCPLL1_CTL, I915_READ(LCPLL1_CTL) & ~LCPLL_PLL_ENABLE); | |
978 | if (intel_wait_for_register(dev_priv, | |
979 | LCPLL1_CTL, LCPLL_PLL_LOCK, 0, | |
980 | 1)) | |
981 | DRM_ERROR("Couldn't disable DPLL0\n"); | |
982 | ||
49cd97a3 | 983 | dev_priv->cdclk.hw.vco = 0; |
7ff89ca2 VS |
984 | } |
985 | ||
986 | static void skl_set_cdclk(struct drm_i915_private *dev_priv, | |
83c5fda7 | 987 | const struct intel_cdclk_state *cdclk_state) |
7ff89ca2 | 988 | { |
83c5fda7 VS |
989 | int cdclk = cdclk_state->cdclk; |
990 | int vco = cdclk_state->vco; | |
53421c2f | 991 | u32 freq_select, cdclk_ctl; |
7ff89ca2 VS |
992 | int ret; |
993 | ||
9f817501 | 994 | mutex_lock(&dev_priv->pcu_lock); |
7ff89ca2 VS |
995 | ret = skl_pcode_request(dev_priv, SKL_PCODE_CDCLK_CONTROL, |
996 | SKL_CDCLK_PREPARE_FOR_CHANGE, | |
997 | SKL_CDCLK_READY_FOR_CHANGE, | |
998 | SKL_CDCLK_READY_FOR_CHANGE, 3); | |
9f817501 | 999 | mutex_unlock(&dev_priv->pcu_lock); |
7ff89ca2 VS |
1000 | if (ret) { |
1001 | DRM_ERROR("Failed to inform PCU about cdclk change (%d)\n", | |
1002 | ret); | |
1003 | return; | |
1004 | } | |
1005 | ||
53421c2f | 1006 | /* Choose frequency for this cdclk */ |
7ff89ca2 | 1007 | switch (cdclk) { |
2b58417f | 1008 | default: |
b6c51c3e | 1009 | WARN_ON(cdclk != dev_priv->cdclk.hw.bypass); |
2b58417f VS |
1010 | WARN_ON(vco != 0); |
1011 | /* fall through */ | |
1012 | case 308571: | |
1013 | case 337500: | |
1014 | freq_select = CDCLK_FREQ_337_308; | |
2b58417f | 1015 | break; |
7ff89ca2 VS |
1016 | case 450000: |
1017 | case 432000: | |
1018 | freq_select = CDCLK_FREQ_450_432; | |
7ff89ca2 VS |
1019 | break; |
1020 | case 540000: | |
1021 | freq_select = CDCLK_FREQ_540; | |
7ff89ca2 | 1022 | break; |
7ff89ca2 VS |
1023 | case 617143: |
1024 | case 675000: | |
1025 | freq_select = CDCLK_FREQ_675_617; | |
7ff89ca2 VS |
1026 | break; |
1027 | } | |
1028 | ||
49cd97a3 VS |
1029 | if (dev_priv->cdclk.hw.vco != 0 && |
1030 | dev_priv->cdclk.hw.vco != vco) | |
7ff89ca2 VS |
1031 | skl_dpll0_disable(dev_priv); |
1032 | ||
53421c2f LDM |
1033 | cdclk_ctl = I915_READ(CDCLK_CTL); |
1034 | ||
1035 | if (dev_priv->cdclk.hw.vco != vco) { | |
1036 | /* Wa Display #1183: skl,kbl,cfl */ | |
1037 | cdclk_ctl &= ~(CDCLK_FREQ_SEL_MASK | CDCLK_FREQ_DECIMAL_MASK); | |
1038 | cdclk_ctl |= freq_select | skl_cdclk_decimal(cdclk); | |
1039 | I915_WRITE(CDCLK_CTL, cdclk_ctl); | |
1040 | } | |
1041 | ||
1042 | /* Wa Display #1183: skl,kbl,cfl */ | |
1043 | cdclk_ctl |= CDCLK_DIVMUX_CD_OVERRIDE; | |
1044 | I915_WRITE(CDCLK_CTL, cdclk_ctl); | |
1045 | POSTING_READ(CDCLK_CTL); | |
1046 | ||
49cd97a3 | 1047 | if (dev_priv->cdclk.hw.vco != vco) |
7ff89ca2 VS |
1048 | skl_dpll0_enable(dev_priv, vco); |
1049 | ||
53421c2f LDM |
1050 | /* Wa Display #1183: skl,kbl,cfl */ |
1051 | cdclk_ctl &= ~(CDCLK_FREQ_SEL_MASK | CDCLK_FREQ_DECIMAL_MASK); | |
1052 | I915_WRITE(CDCLK_CTL, cdclk_ctl); | |
1053 | ||
1054 | cdclk_ctl |= freq_select | skl_cdclk_decimal(cdclk); | |
1055 | I915_WRITE(CDCLK_CTL, cdclk_ctl); | |
1056 | ||
1057 | /* Wa Display #1183: skl,kbl,cfl */ | |
1058 | cdclk_ctl &= ~CDCLK_DIVMUX_CD_OVERRIDE; | |
1059 | I915_WRITE(CDCLK_CTL, cdclk_ctl); | |
7ff89ca2 VS |
1060 | POSTING_READ(CDCLK_CTL); |
1061 | ||
1062 | /* inform PCU of the change */ | |
9f817501 | 1063 | mutex_lock(&dev_priv->pcu_lock); |
2aa97491 VS |
1064 | sandybridge_pcode_write(dev_priv, SKL_PCODE_CDCLK_CONTROL, |
1065 | cdclk_state->voltage_level); | |
9f817501 | 1066 | mutex_unlock(&dev_priv->pcu_lock); |
7ff89ca2 VS |
1067 | |
1068 | intel_update_cdclk(dev_priv); | |
1069 | } | |
1070 | ||
1071 | static void skl_sanitize_cdclk(struct drm_i915_private *dev_priv) | |
1072 | { | |
1073 | uint32_t cdctl, expected; | |
1074 | ||
1075 | /* | |
1076 | * check if the pre-os initialized the display | |
1077 | * There is SWF18 scratchpad register defined which is set by the | |
1078 | * pre-os which can be used by the OS drivers to check the status | |
1079 | */ | |
1080 | if ((I915_READ(SWF_ILK(0x18)) & 0x00FFFFFF) == 0) | |
1081 | goto sanitize; | |
1082 | ||
1083 | intel_update_cdclk(dev_priv); | |
cfddadc9 VS |
1084 | intel_dump_cdclk_state(&dev_priv->cdclk.hw, "Current CDCLK"); |
1085 | ||
7ff89ca2 | 1086 | /* Is PLL enabled and locked ? */ |
49cd97a3 | 1087 | if (dev_priv->cdclk.hw.vco == 0 || |
b6c51c3e | 1088 | dev_priv->cdclk.hw.cdclk == dev_priv->cdclk.hw.bypass) |
7ff89ca2 VS |
1089 | goto sanitize; |
1090 | ||
1091 | /* DPLL okay; verify the cdclock | |
1092 | * | |
1093 | * Noticed in some instances that the freq selection is correct but | |
1094 | * decimal part is programmed wrong from BIOS where pre-os does not | |
1095 | * enable display. Verify the same as well. | |
1096 | */ | |
1097 | cdctl = I915_READ(CDCLK_CTL); | |
1098 | expected = (cdctl & CDCLK_FREQ_SEL_MASK) | | |
49cd97a3 | 1099 | skl_cdclk_decimal(dev_priv->cdclk.hw.cdclk); |
7ff89ca2 VS |
1100 | if (cdctl == expected) |
1101 | /* All well; nothing to sanitize */ | |
1102 | return; | |
1103 | ||
1104 | sanitize: | |
1105 | DRM_DEBUG_KMS("Sanitizing cdclk programmed by pre-os\n"); | |
1106 | ||
1107 | /* force cdclk programming */ | |
49cd97a3 | 1108 | dev_priv->cdclk.hw.cdclk = 0; |
7ff89ca2 | 1109 | /* force full PLL disable + enable */ |
49cd97a3 | 1110 | dev_priv->cdclk.hw.vco = -1; |
7ff89ca2 VS |
1111 | } |
1112 | ||
1113 | /** | |
1114 | * skl_init_cdclk - Initialize CDCLK on SKL | |
1115 | * @dev_priv: i915 device | |
1116 | * | |
1117 | * Initialize CDCLK for SKL and derivatives. This is generally | |
1118 | * done only during the display core initialization sequence, | |
1119 | * after which the DMC will take care of turning CDCLK off/on | |
1120 | * as needed. | |
1121 | */ | |
1122 | void skl_init_cdclk(struct drm_i915_private *dev_priv) | |
1123 | { | |
83c5fda7 | 1124 | struct intel_cdclk_state cdclk_state; |
7ff89ca2 VS |
1125 | |
1126 | skl_sanitize_cdclk(dev_priv); | |
1127 | ||
49cd97a3 VS |
1128 | if (dev_priv->cdclk.hw.cdclk != 0 && |
1129 | dev_priv->cdclk.hw.vco != 0) { | |
7ff89ca2 VS |
1130 | /* |
1131 | * Use the current vco as our initial | |
1132 | * guess as to what the preferred vco is. | |
1133 | */ | |
1134 | if (dev_priv->skl_preferred_vco_freq == 0) | |
1135 | skl_set_preferred_cdclk_vco(dev_priv, | |
49cd97a3 | 1136 | dev_priv->cdclk.hw.vco); |
7ff89ca2 VS |
1137 | return; |
1138 | } | |
1139 | ||
83c5fda7 VS |
1140 | cdclk_state = dev_priv->cdclk.hw; |
1141 | ||
1142 | cdclk_state.vco = dev_priv->skl_preferred_vco_freq; | |
1143 | if (cdclk_state.vco == 0) | |
1144 | cdclk_state.vco = 8100000; | |
1145 | cdclk_state.cdclk = skl_calc_cdclk(0, cdclk_state.vco); | |
2aa97491 | 1146 | cdclk_state.voltage_level = skl_calc_voltage_level(cdclk_state.cdclk); |
7ff89ca2 | 1147 | |
83c5fda7 | 1148 | skl_set_cdclk(dev_priv, &cdclk_state); |
7ff89ca2 VS |
1149 | } |
1150 | ||
1151 | /** | |
1152 | * skl_uninit_cdclk - Uninitialize CDCLK on SKL | |
1153 | * @dev_priv: i915 device | |
1154 | * | |
1155 | * Uninitialize CDCLK for SKL and derivatives. This is done only | |
1156 | * during the display core uninitialization sequence. | |
1157 | */ | |
1158 | void skl_uninit_cdclk(struct drm_i915_private *dev_priv) | |
1159 | { | |
83c5fda7 VS |
1160 | struct intel_cdclk_state cdclk_state = dev_priv->cdclk.hw; |
1161 | ||
b6c51c3e | 1162 | cdclk_state.cdclk = cdclk_state.bypass; |
83c5fda7 | 1163 | cdclk_state.vco = 0; |
2aa97491 | 1164 | cdclk_state.voltage_level = skl_calc_voltage_level(cdclk_state.cdclk); |
83c5fda7 VS |
1165 | |
1166 | skl_set_cdclk(dev_priv, &cdclk_state); | |
7ff89ca2 VS |
1167 | } |
1168 | ||
d305e061 | 1169 | static int bxt_calc_cdclk(int min_cdclk) |
7ff89ca2 | 1170 | { |
d305e061 | 1171 | if (min_cdclk > 576000) |
7ff89ca2 | 1172 | return 624000; |
d305e061 | 1173 | else if (min_cdclk > 384000) |
7ff89ca2 | 1174 | return 576000; |
d305e061 | 1175 | else if (min_cdclk > 288000) |
7ff89ca2 | 1176 | return 384000; |
d305e061 | 1177 | else if (min_cdclk > 144000) |
7ff89ca2 VS |
1178 | return 288000; |
1179 | else | |
1180 | return 144000; | |
1181 | } | |
1182 | ||
d305e061 | 1183 | static int glk_calc_cdclk(int min_cdclk) |
7ff89ca2 | 1184 | { |
d305e061 | 1185 | if (min_cdclk > 158400) |
7ff89ca2 | 1186 | return 316800; |
d305e061 | 1187 | else if (min_cdclk > 79200) |
7ff89ca2 VS |
1188 | return 158400; |
1189 | else | |
1190 | return 79200; | |
1191 | } | |
1192 | ||
2123f442 VS |
1193 | static u8 bxt_calc_voltage_level(int cdclk) |
1194 | { | |
1195 | return DIV_ROUND_UP(cdclk, 25000); | |
1196 | } | |
1197 | ||
7ff89ca2 VS |
1198 | static int bxt_de_pll_vco(struct drm_i915_private *dev_priv, int cdclk) |
1199 | { | |
1200 | int ratio; | |
1201 | ||
b6c51c3e | 1202 | if (cdclk == dev_priv->cdclk.hw.bypass) |
7ff89ca2 VS |
1203 | return 0; |
1204 | ||
1205 | switch (cdclk) { | |
1206 | default: | |
1207 | MISSING_CASE(cdclk); | |
2b58417f | 1208 | /* fall through */ |
7ff89ca2 VS |
1209 | case 144000: |
1210 | case 288000: | |
1211 | case 384000: | |
1212 | case 576000: | |
1213 | ratio = 60; | |
1214 | break; | |
1215 | case 624000: | |
1216 | ratio = 65; | |
1217 | break; | |
1218 | } | |
1219 | ||
49cd97a3 | 1220 | return dev_priv->cdclk.hw.ref * ratio; |
7ff89ca2 VS |
1221 | } |
1222 | ||
1223 | static int glk_de_pll_vco(struct drm_i915_private *dev_priv, int cdclk) | |
1224 | { | |
1225 | int ratio; | |
1226 | ||
b6c51c3e | 1227 | if (cdclk == dev_priv->cdclk.hw.bypass) |
7ff89ca2 VS |
1228 | return 0; |
1229 | ||
1230 | switch (cdclk) { | |
1231 | default: | |
1232 | MISSING_CASE(cdclk); | |
2b58417f | 1233 | /* fall through */ |
7ff89ca2 VS |
1234 | case 79200: |
1235 | case 158400: | |
1236 | case 316800: | |
1237 | ratio = 33; | |
1238 | break; | |
1239 | } | |
1240 | ||
49cd97a3 | 1241 | return dev_priv->cdclk.hw.ref * ratio; |
7ff89ca2 VS |
1242 | } |
1243 | ||
49cd97a3 VS |
1244 | static void bxt_de_pll_update(struct drm_i915_private *dev_priv, |
1245 | struct intel_cdclk_state *cdclk_state) | |
7ff89ca2 VS |
1246 | { |
1247 | u32 val; | |
1248 | ||
49cd97a3 VS |
1249 | cdclk_state->ref = 19200; |
1250 | cdclk_state->vco = 0; | |
7ff89ca2 VS |
1251 | |
1252 | val = I915_READ(BXT_DE_PLL_ENABLE); | |
1253 | if ((val & BXT_DE_PLL_PLL_ENABLE) == 0) | |
1254 | return; | |
1255 | ||
1256 | if (WARN_ON((val & BXT_DE_PLL_LOCK) == 0)) | |
1257 | return; | |
1258 | ||
1259 | val = I915_READ(BXT_DE_PLL_CTL); | |
49cd97a3 | 1260 | cdclk_state->vco = (val & BXT_DE_PLL_RATIO_MASK) * cdclk_state->ref; |
7ff89ca2 VS |
1261 | } |
1262 | ||
49cd97a3 VS |
1263 | static void bxt_get_cdclk(struct drm_i915_private *dev_priv, |
1264 | struct intel_cdclk_state *cdclk_state) | |
7ff89ca2 VS |
1265 | { |
1266 | u32 divider; | |
49cd97a3 | 1267 | int div; |
7ff89ca2 | 1268 | |
49cd97a3 | 1269 | bxt_de_pll_update(dev_priv, cdclk_state); |
7ff89ca2 | 1270 | |
b6c51c3e | 1271 | cdclk_state->cdclk = cdclk_state->bypass = cdclk_state->ref; |
49cd97a3 VS |
1272 | |
1273 | if (cdclk_state->vco == 0) | |
2123f442 | 1274 | goto out; |
7ff89ca2 VS |
1275 | |
1276 | divider = I915_READ(CDCLK_CTL) & BXT_CDCLK_CD2X_DIV_SEL_MASK; | |
1277 | ||
1278 | switch (divider) { | |
1279 | case BXT_CDCLK_CD2X_DIV_SEL_1: | |
1280 | div = 2; | |
1281 | break; | |
1282 | case BXT_CDCLK_CD2X_DIV_SEL_1_5: | |
1283 | WARN(IS_GEMINILAKE(dev_priv), "Unsupported divider\n"); | |
1284 | div = 3; | |
1285 | break; | |
1286 | case BXT_CDCLK_CD2X_DIV_SEL_2: | |
1287 | div = 4; | |
1288 | break; | |
1289 | case BXT_CDCLK_CD2X_DIV_SEL_4: | |
1290 | div = 8; | |
1291 | break; | |
1292 | default: | |
1293 | MISSING_CASE(divider); | |
49cd97a3 | 1294 | return; |
7ff89ca2 VS |
1295 | } |
1296 | ||
49cd97a3 | 1297 | cdclk_state->cdclk = DIV_ROUND_CLOSEST(cdclk_state->vco, div); |
2123f442 VS |
1298 | |
1299 | out: | |
1300 | /* | |
1301 | * Can't read this out :( Let's assume it's | |
1302 | * at least what the CDCLK frequency requires. | |
1303 | */ | |
1304 | cdclk_state->voltage_level = | |
1305 | bxt_calc_voltage_level(cdclk_state->cdclk); | |
7ff89ca2 VS |
1306 | } |
1307 | ||
1308 | static void bxt_de_pll_disable(struct drm_i915_private *dev_priv) | |
1309 | { | |
1310 | I915_WRITE(BXT_DE_PLL_ENABLE, 0); | |
1311 | ||
1312 | /* Timeout 200us */ | |
1313 | if (intel_wait_for_register(dev_priv, | |
1314 | BXT_DE_PLL_ENABLE, BXT_DE_PLL_LOCK, 0, | |
1315 | 1)) | |
1316 | DRM_ERROR("timeout waiting for DE PLL unlock\n"); | |
1317 | ||
49cd97a3 | 1318 | dev_priv->cdclk.hw.vco = 0; |
7ff89ca2 VS |
1319 | } |
1320 | ||
1321 | static void bxt_de_pll_enable(struct drm_i915_private *dev_priv, int vco) | |
1322 | { | |
49cd97a3 | 1323 | int ratio = DIV_ROUND_CLOSEST(vco, dev_priv->cdclk.hw.ref); |
7ff89ca2 VS |
1324 | u32 val; |
1325 | ||
1326 | val = I915_READ(BXT_DE_PLL_CTL); | |
1327 | val &= ~BXT_DE_PLL_RATIO_MASK; | |
1328 | val |= BXT_DE_PLL_RATIO(ratio); | |
1329 | I915_WRITE(BXT_DE_PLL_CTL, val); | |
1330 | ||
1331 | I915_WRITE(BXT_DE_PLL_ENABLE, BXT_DE_PLL_PLL_ENABLE); | |
1332 | ||
1333 | /* Timeout 200us */ | |
1334 | if (intel_wait_for_register(dev_priv, | |
1335 | BXT_DE_PLL_ENABLE, | |
1336 | BXT_DE_PLL_LOCK, | |
1337 | BXT_DE_PLL_LOCK, | |
1338 | 1)) | |
1339 | DRM_ERROR("timeout waiting for DE PLL lock\n"); | |
1340 | ||
49cd97a3 | 1341 | dev_priv->cdclk.hw.vco = vco; |
7ff89ca2 VS |
1342 | } |
1343 | ||
8f0cfa4d | 1344 | static void bxt_set_cdclk(struct drm_i915_private *dev_priv, |
83c5fda7 | 1345 | const struct intel_cdclk_state *cdclk_state) |
7ff89ca2 | 1346 | { |
83c5fda7 VS |
1347 | int cdclk = cdclk_state->cdclk; |
1348 | int vco = cdclk_state->vco; | |
7ff89ca2 | 1349 | u32 val, divider; |
8f0cfa4d | 1350 | int ret; |
7ff89ca2 | 1351 | |
7ff89ca2 VS |
1352 | /* cdclk = vco / 2 / div{1,1.5,2,4} */ |
1353 | switch (DIV_ROUND_CLOSEST(vco, cdclk)) { | |
2b58417f | 1354 | default: |
b6c51c3e | 1355 | WARN_ON(cdclk != dev_priv->cdclk.hw.bypass); |
2b58417f VS |
1356 | WARN_ON(vco != 0); |
1357 | /* fall through */ | |
1358 | case 2: | |
1359 | divider = BXT_CDCLK_CD2X_DIV_SEL_1; | |
7ff89ca2 VS |
1360 | break; |
1361 | case 3: | |
1362 | WARN(IS_GEMINILAKE(dev_priv), "Unsupported divider\n"); | |
1363 | divider = BXT_CDCLK_CD2X_DIV_SEL_1_5; | |
1364 | break; | |
2b58417f VS |
1365 | case 4: |
1366 | divider = BXT_CDCLK_CD2X_DIV_SEL_2; | |
7ff89ca2 | 1367 | break; |
2b58417f VS |
1368 | case 8: |
1369 | divider = BXT_CDCLK_CD2X_DIV_SEL_4; | |
7ff89ca2 VS |
1370 | break; |
1371 | } | |
1372 | ||
1373 | /* Inform power controller of upcoming frequency change */ | |
9f817501 | 1374 | mutex_lock(&dev_priv->pcu_lock); |
7ff89ca2 VS |
1375 | ret = sandybridge_pcode_write(dev_priv, HSW_PCODE_DE_WRITE_FREQ_REQ, |
1376 | 0x80000000); | |
9f817501 | 1377 | mutex_unlock(&dev_priv->pcu_lock); |
7ff89ca2 VS |
1378 | |
1379 | if (ret) { | |
1380 | DRM_ERROR("PCode CDCLK freq change notify failed (err %d, freq %d)\n", | |
1381 | ret, cdclk); | |
1382 | return; | |
1383 | } | |
1384 | ||
49cd97a3 VS |
1385 | if (dev_priv->cdclk.hw.vco != 0 && |
1386 | dev_priv->cdclk.hw.vco != vco) | |
7ff89ca2 VS |
1387 | bxt_de_pll_disable(dev_priv); |
1388 | ||
49cd97a3 | 1389 | if (dev_priv->cdclk.hw.vco != vco) |
7ff89ca2 VS |
1390 | bxt_de_pll_enable(dev_priv, vco); |
1391 | ||
1392 | val = divider | skl_cdclk_decimal(cdclk); | |
1393 | /* | |
1394 | * FIXME if only the cd2x divider needs changing, it could be done | |
1395 | * without shutting off the pipe (if only one pipe is active). | |
1396 | */ | |
1397 | val |= BXT_CDCLK_CD2X_PIPE_NONE; | |
1398 | /* | |
1399 | * Disable SSA Precharge when CD clock frequency < 500 MHz, | |
1400 | * enable otherwise. | |
1401 | */ | |
1402 | if (cdclk >= 500000) | |
1403 | val |= BXT_CDCLK_SSA_PRECHARGE_ENABLE; | |
1404 | I915_WRITE(CDCLK_CTL, val); | |
1405 | ||
9f817501 | 1406 | mutex_lock(&dev_priv->pcu_lock); |
7ff89ca2 | 1407 | ret = sandybridge_pcode_write(dev_priv, HSW_PCODE_DE_WRITE_FREQ_REQ, |
2123f442 | 1408 | cdclk_state->voltage_level); |
9f817501 | 1409 | mutex_unlock(&dev_priv->pcu_lock); |
7ff89ca2 VS |
1410 | |
1411 | if (ret) { | |
1412 | DRM_ERROR("PCode CDCLK freq set failed, (err %d, freq %d)\n", | |
1413 | ret, cdclk); | |
1414 | return; | |
1415 | } | |
1416 | ||
1417 | intel_update_cdclk(dev_priv); | |
1418 | } | |
1419 | ||
1420 | static void bxt_sanitize_cdclk(struct drm_i915_private *dev_priv) | |
1421 | { | |
1422 | u32 cdctl, expected; | |
1423 | ||
1424 | intel_update_cdclk(dev_priv); | |
cfddadc9 | 1425 | intel_dump_cdclk_state(&dev_priv->cdclk.hw, "Current CDCLK"); |
7ff89ca2 | 1426 | |
49cd97a3 | 1427 | if (dev_priv->cdclk.hw.vco == 0 || |
b6c51c3e | 1428 | dev_priv->cdclk.hw.cdclk == dev_priv->cdclk.hw.bypass) |
7ff89ca2 VS |
1429 | goto sanitize; |
1430 | ||
1431 | /* DPLL okay; verify the cdclock | |
1432 | * | |
1433 | * Some BIOS versions leave an incorrect decimal frequency value and | |
1434 | * set reserved MBZ bits in CDCLK_CTL at least during exiting from S4, | |
1435 | * so sanitize this register. | |
1436 | */ | |
1437 | cdctl = I915_READ(CDCLK_CTL); | |
1438 | /* | |
1439 | * Let's ignore the pipe field, since BIOS could have configured the | |
1440 | * dividers both synching to an active pipe, or asynchronously | |
1441 | * (PIPE_NONE). | |
1442 | */ | |
1443 | cdctl &= ~BXT_CDCLK_CD2X_PIPE_NONE; | |
1444 | ||
1445 | expected = (cdctl & BXT_CDCLK_CD2X_DIV_SEL_MASK) | | |
49cd97a3 | 1446 | skl_cdclk_decimal(dev_priv->cdclk.hw.cdclk); |
7ff89ca2 VS |
1447 | /* |
1448 | * Disable SSA Precharge when CD clock frequency < 500 MHz, | |
1449 | * enable otherwise. | |
1450 | */ | |
49cd97a3 | 1451 | if (dev_priv->cdclk.hw.cdclk >= 500000) |
7ff89ca2 VS |
1452 | expected |= BXT_CDCLK_SSA_PRECHARGE_ENABLE; |
1453 | ||
1454 | if (cdctl == expected) | |
1455 | /* All well; nothing to sanitize */ | |
1456 | return; | |
1457 | ||
1458 | sanitize: | |
1459 | DRM_DEBUG_KMS("Sanitizing cdclk programmed by pre-os\n"); | |
1460 | ||
1461 | /* force cdclk programming */ | |
49cd97a3 | 1462 | dev_priv->cdclk.hw.cdclk = 0; |
7ff89ca2 VS |
1463 | |
1464 | /* force full PLL disable + enable */ | |
49cd97a3 | 1465 | dev_priv->cdclk.hw.vco = -1; |
7ff89ca2 VS |
1466 | } |
1467 | ||
1468 | /** | |
1469 | * bxt_init_cdclk - Initialize CDCLK on BXT | |
1470 | * @dev_priv: i915 device | |
1471 | * | |
1472 | * Initialize CDCLK for BXT and derivatives. This is generally | |
1473 | * done only during the display core initialization sequence, | |
1474 | * after which the DMC will take care of turning CDCLK off/on | |
1475 | * as needed. | |
1476 | */ | |
1477 | void bxt_init_cdclk(struct drm_i915_private *dev_priv) | |
1478 | { | |
83c5fda7 | 1479 | struct intel_cdclk_state cdclk_state; |
7ff89ca2 VS |
1480 | |
1481 | bxt_sanitize_cdclk(dev_priv); | |
1482 | ||
49cd97a3 VS |
1483 | if (dev_priv->cdclk.hw.cdclk != 0 && |
1484 | dev_priv->cdclk.hw.vco != 0) | |
7ff89ca2 VS |
1485 | return; |
1486 | ||
83c5fda7 VS |
1487 | cdclk_state = dev_priv->cdclk.hw; |
1488 | ||
7ff89ca2 VS |
1489 | /* |
1490 | * FIXME: | |
1491 | * - The initial CDCLK needs to be read from VBT. | |
1492 | * Need to make this change after VBT has changes for BXT. | |
1493 | */ | |
8f0cfa4d | 1494 | if (IS_GEMINILAKE(dev_priv)) { |
83c5fda7 VS |
1495 | cdclk_state.cdclk = glk_calc_cdclk(0); |
1496 | cdclk_state.vco = glk_de_pll_vco(dev_priv, cdclk_state.cdclk); | |
8f0cfa4d | 1497 | } else { |
83c5fda7 VS |
1498 | cdclk_state.cdclk = bxt_calc_cdclk(0); |
1499 | cdclk_state.vco = bxt_de_pll_vco(dev_priv, cdclk_state.cdclk); | |
8f0cfa4d | 1500 | } |
2123f442 | 1501 | cdclk_state.voltage_level = bxt_calc_voltage_level(cdclk_state.cdclk); |
7ff89ca2 | 1502 | |
83c5fda7 | 1503 | bxt_set_cdclk(dev_priv, &cdclk_state); |
7ff89ca2 VS |
1504 | } |
1505 | ||
1506 | /** | |
1507 | * bxt_uninit_cdclk - Uninitialize CDCLK on BXT | |
1508 | * @dev_priv: i915 device | |
1509 | * | |
1510 | * Uninitialize CDCLK for BXT and derivatives. This is done only | |
1511 | * during the display core uninitialization sequence. | |
1512 | */ | |
1513 | void bxt_uninit_cdclk(struct drm_i915_private *dev_priv) | |
1514 | { | |
83c5fda7 VS |
1515 | struct intel_cdclk_state cdclk_state = dev_priv->cdclk.hw; |
1516 | ||
b6c51c3e | 1517 | cdclk_state.cdclk = cdclk_state.bypass; |
83c5fda7 | 1518 | cdclk_state.vco = 0; |
2123f442 | 1519 | cdclk_state.voltage_level = bxt_calc_voltage_level(cdclk_state.cdclk); |
83c5fda7 VS |
1520 | |
1521 | bxt_set_cdclk(dev_priv, &cdclk_state); | |
49cd97a3 VS |
1522 | } |
1523 | ||
d305e061 | 1524 | static int cnl_calc_cdclk(int min_cdclk) |
d1999e9e | 1525 | { |
d305e061 | 1526 | if (min_cdclk > 336000) |
d1999e9e | 1527 | return 528000; |
d305e061 | 1528 | else if (min_cdclk > 168000) |
d1999e9e RV |
1529 | return 336000; |
1530 | else | |
1531 | return 168000; | |
1532 | } | |
1533 | ||
48469ece VS |
1534 | static u8 cnl_calc_voltage_level(int cdclk) |
1535 | { | |
1536 | switch (cdclk) { | |
1537 | default: | |
1538 | case 168000: | |
1539 | return 0; | |
1540 | case 336000: | |
1541 | return 1; | |
1542 | case 528000: | |
1543 | return 2; | |
1544 | } | |
1545 | } | |
1546 | ||
945f2672 VS |
1547 | static void cnl_cdclk_pll_update(struct drm_i915_private *dev_priv, |
1548 | struct intel_cdclk_state *cdclk_state) | |
1549 | { | |
1550 | u32 val; | |
1551 | ||
1552 | if (I915_READ(SKL_DSSM) & CNL_DSSM_CDCLK_PLL_REFCLK_24MHz) | |
1553 | cdclk_state->ref = 24000; | |
1554 | else | |
1555 | cdclk_state->ref = 19200; | |
1556 | ||
1557 | cdclk_state->vco = 0; | |
1558 | ||
1559 | val = I915_READ(BXT_DE_PLL_ENABLE); | |
1560 | if ((val & BXT_DE_PLL_PLL_ENABLE) == 0) | |
1561 | return; | |
1562 | ||
1563 | if (WARN_ON((val & BXT_DE_PLL_LOCK) == 0)) | |
1564 | return; | |
1565 | ||
1566 | cdclk_state->vco = (val & CNL_CDCLK_PLL_RATIO_MASK) * cdclk_state->ref; | |
1567 | } | |
1568 | ||
1569 | static void cnl_get_cdclk(struct drm_i915_private *dev_priv, | |
1570 | struct intel_cdclk_state *cdclk_state) | |
1571 | { | |
1572 | u32 divider; | |
1573 | int div; | |
1574 | ||
1575 | cnl_cdclk_pll_update(dev_priv, cdclk_state); | |
1576 | ||
b6c51c3e | 1577 | cdclk_state->cdclk = cdclk_state->bypass = cdclk_state->ref; |
945f2672 VS |
1578 | |
1579 | if (cdclk_state->vco == 0) | |
48469ece | 1580 | goto out; |
945f2672 VS |
1581 | |
1582 | divider = I915_READ(CDCLK_CTL) & BXT_CDCLK_CD2X_DIV_SEL_MASK; | |
1583 | ||
1584 | switch (divider) { | |
1585 | case BXT_CDCLK_CD2X_DIV_SEL_1: | |
1586 | div = 2; | |
1587 | break; | |
1588 | case BXT_CDCLK_CD2X_DIV_SEL_2: | |
1589 | div = 4; | |
1590 | break; | |
1591 | default: | |
1592 | MISSING_CASE(divider); | |
1593 | return; | |
1594 | } | |
1595 | ||
1596 | cdclk_state->cdclk = DIV_ROUND_CLOSEST(cdclk_state->vco, div); | |
48469ece VS |
1597 | |
1598 | out: | |
1599 | /* | |
1600 | * Can't read this out :( Let's assume it's | |
1601 | * at least what the CDCLK frequency requires. | |
1602 | */ | |
1603 | cdclk_state->voltage_level = | |
1604 | cnl_calc_voltage_level(cdclk_state->cdclk); | |
945f2672 VS |
1605 | } |
1606 | ||
ef4f7a68 VS |
1607 | static void cnl_cdclk_pll_disable(struct drm_i915_private *dev_priv) |
1608 | { | |
1609 | u32 val; | |
1610 | ||
1611 | val = I915_READ(BXT_DE_PLL_ENABLE); | |
1612 | val &= ~BXT_DE_PLL_PLL_ENABLE; | |
1613 | I915_WRITE(BXT_DE_PLL_ENABLE, val); | |
1614 | ||
1615 | /* Timeout 200us */ | |
1616 | if (wait_for((I915_READ(BXT_DE_PLL_ENABLE) & BXT_DE_PLL_LOCK) == 0, 1)) | |
1617 | DRM_ERROR("timout waiting for CDCLK PLL unlock\n"); | |
1618 | ||
1619 | dev_priv->cdclk.hw.vco = 0; | |
1620 | } | |
1621 | ||
1622 | static void cnl_cdclk_pll_enable(struct drm_i915_private *dev_priv, int vco) | |
1623 | { | |
1624 | int ratio = DIV_ROUND_CLOSEST(vco, dev_priv->cdclk.hw.ref); | |
1625 | u32 val; | |
1626 | ||
1627 | val = CNL_CDCLK_PLL_RATIO(ratio); | |
1628 | I915_WRITE(BXT_DE_PLL_ENABLE, val); | |
1629 | ||
1630 | val |= BXT_DE_PLL_PLL_ENABLE; | |
1631 | I915_WRITE(BXT_DE_PLL_ENABLE, val); | |
1632 | ||
1633 | /* Timeout 200us */ | |
1634 | if (wait_for((I915_READ(BXT_DE_PLL_ENABLE) & BXT_DE_PLL_LOCK) != 0, 1)) | |
1635 | DRM_ERROR("timout waiting for CDCLK PLL lock\n"); | |
1636 | ||
1637 | dev_priv->cdclk.hw.vco = vco; | |
1638 | } | |
1639 | ||
ef4f7a68 VS |
1640 | static void cnl_set_cdclk(struct drm_i915_private *dev_priv, |
1641 | const struct intel_cdclk_state *cdclk_state) | |
1642 | { | |
1643 | int cdclk = cdclk_state->cdclk; | |
1644 | int vco = cdclk_state->vco; | |
48469ece | 1645 | u32 val, divider; |
ef4f7a68 VS |
1646 | int ret; |
1647 | ||
9f817501 | 1648 | mutex_lock(&dev_priv->pcu_lock); |
ef4f7a68 VS |
1649 | ret = skl_pcode_request(dev_priv, SKL_PCODE_CDCLK_CONTROL, |
1650 | SKL_CDCLK_PREPARE_FOR_CHANGE, | |
1651 | SKL_CDCLK_READY_FOR_CHANGE, | |
1652 | SKL_CDCLK_READY_FOR_CHANGE, 3); | |
9f817501 | 1653 | mutex_unlock(&dev_priv->pcu_lock); |
ef4f7a68 VS |
1654 | if (ret) { |
1655 | DRM_ERROR("Failed to inform PCU about cdclk change (%d)\n", | |
1656 | ret); | |
1657 | return; | |
1658 | } | |
1659 | ||
1660 | /* cdclk = vco / 2 / div{1,2} */ | |
1661 | switch (DIV_ROUND_CLOSEST(vco, cdclk)) { | |
ef4f7a68 | 1662 | default: |
b6c51c3e | 1663 | WARN_ON(cdclk != dev_priv->cdclk.hw.bypass); |
ef4f7a68 | 1664 | WARN_ON(vco != 0); |
2b58417f VS |
1665 | /* fall through */ |
1666 | case 2: | |
ef4f7a68 VS |
1667 | divider = BXT_CDCLK_CD2X_DIV_SEL_1; |
1668 | break; | |
2b58417f VS |
1669 | case 4: |
1670 | divider = BXT_CDCLK_CD2X_DIV_SEL_2; | |
1671 | break; | |
ef4f7a68 VS |
1672 | } |
1673 | ||
ef4f7a68 VS |
1674 | if (dev_priv->cdclk.hw.vco != 0 && |
1675 | dev_priv->cdclk.hw.vco != vco) | |
1676 | cnl_cdclk_pll_disable(dev_priv); | |
1677 | ||
1678 | if (dev_priv->cdclk.hw.vco != vco) | |
1679 | cnl_cdclk_pll_enable(dev_priv, vco); | |
1680 | ||
1681 | val = divider | skl_cdclk_decimal(cdclk); | |
1682 | /* | |
1683 | * FIXME if only the cd2x divider needs changing, it could be done | |
1684 | * without shutting off the pipe (if only one pipe is active). | |
1685 | */ | |
1686 | val |= BXT_CDCLK_CD2X_PIPE_NONE; | |
1687 | I915_WRITE(CDCLK_CTL, val); | |
1688 | ||
1689 | /* inform PCU of the change */ | |
9f817501 | 1690 | mutex_lock(&dev_priv->pcu_lock); |
48469ece VS |
1691 | sandybridge_pcode_write(dev_priv, SKL_PCODE_CDCLK_CONTROL, |
1692 | cdclk_state->voltage_level); | |
9f817501 | 1693 | mutex_unlock(&dev_priv->pcu_lock); |
ef4f7a68 VS |
1694 | |
1695 | intel_update_cdclk(dev_priv); | |
53e9bf5e VS |
1696 | |
1697 | /* | |
1698 | * Can't read out the voltage level :( | |
1699 | * Let's just assume everything is as expected. | |
1700 | */ | |
1701 | dev_priv->cdclk.hw.voltage_level = cdclk_state->voltage_level; | |
ef4f7a68 VS |
1702 | } |
1703 | ||
d8d4a512 VS |
1704 | static int cnl_cdclk_pll_vco(struct drm_i915_private *dev_priv, int cdclk) |
1705 | { | |
1706 | int ratio; | |
1707 | ||
b6c51c3e | 1708 | if (cdclk == dev_priv->cdclk.hw.bypass) |
d8d4a512 VS |
1709 | return 0; |
1710 | ||
1711 | switch (cdclk) { | |
1712 | default: | |
1713 | MISSING_CASE(cdclk); | |
2b58417f | 1714 | /* fall through */ |
d8d4a512 VS |
1715 | case 168000: |
1716 | case 336000: | |
1717 | ratio = dev_priv->cdclk.hw.ref == 19200 ? 35 : 28; | |
1718 | break; | |
1719 | case 528000: | |
1720 | ratio = dev_priv->cdclk.hw.ref == 19200 ? 55 : 44; | |
1721 | break; | |
1722 | } | |
1723 | ||
1724 | return dev_priv->cdclk.hw.ref * ratio; | |
1725 | } | |
1726 | ||
1727 | static void cnl_sanitize_cdclk(struct drm_i915_private *dev_priv) | |
1728 | { | |
1729 | u32 cdctl, expected; | |
1730 | ||
1731 | intel_update_cdclk(dev_priv); | |
cfddadc9 | 1732 | intel_dump_cdclk_state(&dev_priv->cdclk.hw, "Current CDCLK"); |
d8d4a512 VS |
1733 | |
1734 | if (dev_priv->cdclk.hw.vco == 0 || | |
b6c51c3e | 1735 | dev_priv->cdclk.hw.cdclk == dev_priv->cdclk.hw.bypass) |
d8d4a512 VS |
1736 | goto sanitize; |
1737 | ||
1738 | /* DPLL okay; verify the cdclock | |
1739 | * | |
1740 | * Some BIOS versions leave an incorrect decimal frequency value and | |
1741 | * set reserved MBZ bits in CDCLK_CTL at least during exiting from S4, | |
1742 | * so sanitize this register. | |
1743 | */ | |
1744 | cdctl = I915_READ(CDCLK_CTL); | |
1745 | /* | |
1746 | * Let's ignore the pipe field, since BIOS could have configured the | |
1747 | * dividers both synching to an active pipe, or asynchronously | |
1748 | * (PIPE_NONE). | |
1749 | */ | |
1750 | cdctl &= ~BXT_CDCLK_CD2X_PIPE_NONE; | |
1751 | ||
1752 | expected = (cdctl & BXT_CDCLK_CD2X_DIV_SEL_MASK) | | |
1753 | skl_cdclk_decimal(dev_priv->cdclk.hw.cdclk); | |
1754 | ||
1755 | if (cdctl == expected) | |
1756 | /* All well; nothing to sanitize */ | |
1757 | return; | |
1758 | ||
1759 | sanitize: | |
1760 | DRM_DEBUG_KMS("Sanitizing cdclk programmed by pre-os\n"); | |
1761 | ||
1762 | /* force cdclk programming */ | |
1763 | dev_priv->cdclk.hw.cdclk = 0; | |
1764 | ||
1765 | /* force full PLL disable + enable */ | |
1766 | dev_priv->cdclk.hw.vco = -1; | |
1767 | } | |
1768 | ||
1769 | /** | |
1770 | * cnl_init_cdclk - Initialize CDCLK on CNL | |
1771 | * @dev_priv: i915 device | |
1772 | * | |
1773 | * Initialize CDCLK for CNL. This is generally | |
1774 | * done only during the display core initialization sequence, | |
1775 | * after which the DMC will take care of turning CDCLK off/on | |
1776 | * as needed. | |
1777 | */ | |
1778 | void cnl_init_cdclk(struct drm_i915_private *dev_priv) | |
1779 | { | |
1780 | struct intel_cdclk_state cdclk_state; | |
1781 | ||
1782 | cnl_sanitize_cdclk(dev_priv); | |
1783 | ||
1784 | if (dev_priv->cdclk.hw.cdclk != 0 && | |
1785 | dev_priv->cdclk.hw.vco != 0) | |
1786 | return; | |
1787 | ||
1788 | cdclk_state = dev_priv->cdclk.hw; | |
1789 | ||
d1999e9e | 1790 | cdclk_state.cdclk = cnl_calc_cdclk(0); |
d8d4a512 | 1791 | cdclk_state.vco = cnl_cdclk_pll_vco(dev_priv, cdclk_state.cdclk); |
48469ece | 1792 | cdclk_state.voltage_level = cnl_calc_voltage_level(cdclk_state.cdclk); |
d8d4a512 VS |
1793 | |
1794 | cnl_set_cdclk(dev_priv, &cdclk_state); | |
1795 | } | |
1796 | ||
1797 | /** | |
1798 | * cnl_uninit_cdclk - Uninitialize CDCLK on CNL | |
1799 | * @dev_priv: i915 device | |
1800 | * | |
1801 | * Uninitialize CDCLK for CNL. This is done only | |
1802 | * during the display core uninitialization sequence. | |
1803 | */ | |
1804 | void cnl_uninit_cdclk(struct drm_i915_private *dev_priv) | |
1805 | { | |
1806 | struct intel_cdclk_state cdclk_state = dev_priv->cdclk.hw; | |
1807 | ||
b6c51c3e | 1808 | cdclk_state.cdclk = cdclk_state.bypass; |
d8d4a512 | 1809 | cdclk_state.vco = 0; |
48469ece | 1810 | cdclk_state.voltage_level = cnl_calc_voltage_level(cdclk_state.cdclk); |
d8d4a512 VS |
1811 | |
1812 | cnl_set_cdclk(dev_priv, &cdclk_state); | |
1813 | } | |
1814 | ||
49cd97a3 | 1815 | /** |
64600bd5 | 1816 | * intel_cdclk_needs_modeset - Determine if two CDCLK states require a modeset on all pipes |
49cd97a3 VS |
1817 | * @a: first CDCLK state |
1818 | * @b: second CDCLK state | |
1819 | * | |
1820 | * Returns: | |
64600bd5 | 1821 | * True if the CDCLK states require pipes to be off during reprogramming, false if not. |
49cd97a3 | 1822 | */ |
64600bd5 | 1823 | bool intel_cdclk_needs_modeset(const struct intel_cdclk_state *a, |
49cd97a3 VS |
1824 | const struct intel_cdclk_state *b) |
1825 | { | |
64600bd5 VS |
1826 | return a->cdclk != b->cdclk || |
1827 | a->vco != b->vco || | |
1828 | a->ref != b->ref; | |
1829 | } | |
1830 | ||
1831 | /** | |
1832 | * intel_cdclk_changed - Determine if two CDCLK states are different | |
1833 | * @a: first CDCLK state | |
1834 | * @b: second CDCLK state | |
1835 | * | |
1836 | * Returns: | |
1837 | * True if the CDCLK states don't match, false if they do. | |
1838 | */ | |
1839 | bool intel_cdclk_changed(const struct intel_cdclk_state *a, | |
1840 | const struct intel_cdclk_state *b) | |
1841 | { | |
1842 | return intel_cdclk_needs_modeset(a, b) || | |
1843 | a->voltage_level != b->voltage_level; | |
7ff89ca2 VS |
1844 | } |
1845 | ||
cfddadc9 VS |
1846 | void intel_dump_cdclk_state(const struct intel_cdclk_state *cdclk_state, |
1847 | const char *context) | |
1848 | { | |
b6c51c3e | 1849 | DRM_DEBUG_DRIVER("%s %d kHz, VCO %d kHz, ref %d kHz, bypass %d kHz, voltage level %d\n", |
cfddadc9 | 1850 | context, cdclk_state->cdclk, cdclk_state->vco, |
b6c51c3e ID |
1851 | cdclk_state->ref, cdclk_state->bypass, |
1852 | cdclk_state->voltage_level); | |
cfddadc9 VS |
1853 | } |
1854 | ||
b0587e4d VS |
1855 | /** |
1856 | * intel_set_cdclk - Push the CDCLK state to the hardware | |
1857 | * @dev_priv: i915 device | |
1858 | * @cdclk_state: new CDCLK state | |
1859 | * | |
1860 | * Program the hardware based on the passed in CDCLK state, | |
1861 | * if necessary. | |
1862 | */ | |
1863 | void intel_set_cdclk(struct drm_i915_private *dev_priv, | |
1864 | const struct intel_cdclk_state *cdclk_state) | |
1865 | { | |
64600bd5 | 1866 | if (!intel_cdclk_changed(&dev_priv->cdclk.hw, cdclk_state)) |
b0587e4d VS |
1867 | return; |
1868 | ||
1869 | if (WARN_ON_ONCE(!dev_priv->display.set_cdclk)) | |
1870 | return; | |
1871 | ||
cfddadc9 | 1872 | intel_dump_cdclk_state(cdclk_state, "Changing CDCLK to"); |
b0587e4d VS |
1873 | |
1874 | dev_priv->display.set_cdclk(dev_priv, cdclk_state); | |
cfddadc9 VS |
1875 | |
1876 | if (WARN(intel_cdclk_changed(&dev_priv->cdclk.hw, cdclk_state), | |
1877 | "cdclk state doesn't match!\n")) { | |
1878 | intel_dump_cdclk_state(&dev_priv->cdclk.hw, "[hw state]"); | |
1879 | intel_dump_cdclk_state(cdclk_state, "[sw state]"); | |
1880 | } | |
b0587e4d VS |
1881 | } |
1882 | ||
d305e061 VS |
1883 | static int intel_pixel_rate_to_cdclk(struct drm_i915_private *dev_priv, |
1884 | int pixel_rate) | |
1885 | { | |
1886 | if (INTEL_GEN(dev_priv) >= 10) | |
43037c86 | 1887 | return DIV_ROUND_UP(pixel_rate, 2); |
d305e061 VS |
1888 | else if (IS_GEMINILAKE(dev_priv)) |
1889 | /* | |
1890 | * FIXME: Avoid using a pixel clock that is more than 99% of the cdclk | |
1891 | * as a temporary workaround. Use a higher cdclk instead. (Note that | |
1892 | * intel_compute_max_dotclk() limits the max pixel clock to 99% of max | |
1893 | * cdclk.) | |
1894 | */ | |
1895 | return DIV_ROUND_UP(pixel_rate * 100, 2 * 99); | |
1896 | else if (IS_GEN9(dev_priv) || | |
1897 | IS_BROADWELL(dev_priv) || IS_HASWELL(dev_priv)) | |
1898 | return pixel_rate; | |
1899 | else if (IS_CHERRYVIEW(dev_priv)) | |
1900 | return DIV_ROUND_UP(pixel_rate * 100, 95); | |
1901 | else | |
1902 | return DIV_ROUND_UP(pixel_rate * 100, 90); | |
1903 | } | |
1904 | ||
1905 | int intel_crtc_compute_min_cdclk(const struct intel_crtc_state *crtc_state) | |
7ff89ca2 VS |
1906 | { |
1907 | struct drm_i915_private *dev_priv = | |
1908 | to_i915(crtc_state->base.crtc->dev); | |
d305e061 VS |
1909 | int min_cdclk; |
1910 | ||
1911 | if (!crtc_state->base.enable) | |
1912 | return 0; | |
1913 | ||
1914 | min_cdclk = intel_pixel_rate_to_cdclk(dev_priv, crtc_state->pixel_rate); | |
7ff89ca2 VS |
1915 | |
1916 | /* pixel rate mustn't exceed 95% of cdclk with IPS on BDW */ | |
24f28450 | 1917 | if (IS_BROADWELL(dev_priv) && hsw_crtc_state_ips_capable(crtc_state)) |
d305e061 | 1918 | min_cdclk = DIV_ROUND_UP(min_cdclk * 100, 95); |
7ff89ca2 | 1919 | |
78cfa580 PD |
1920 | /* BSpec says "Do not use DisplayPort with CDCLK less than 432 MHz, |
1921 | * audio enabled, port width x4, and link rate HBR2 (5.4 GHz), or else | |
1922 | * there may be audio corruption or screen corruption." This cdclk | |
d305e061 | 1923 | * restriction for GLK is 316.8 MHz. |
7ff89ca2 VS |
1924 | */ |
1925 | if (intel_crtc_has_dp_encoder(crtc_state) && | |
1926 | crtc_state->has_audio && | |
1927 | crtc_state->port_clock >= 540000 && | |
78cfa580 | 1928 | crtc_state->lane_count == 4) { |
d305e061 VS |
1929 | if (IS_CANNONLAKE(dev_priv) || IS_GEMINILAKE(dev_priv)) { |
1930 | /* Display WA #1145: glk,cnl */ | |
1931 | min_cdclk = max(316800, min_cdclk); | |
1932 | } else if (IS_GEN9(dev_priv) || IS_BROADWELL(dev_priv)) { | |
1933 | /* Display WA #1144: skl,bxt */ | |
1934 | min_cdclk = max(432000, min_cdclk); | |
1935 | } | |
78cfa580 | 1936 | } |
7ff89ca2 | 1937 | |
8cbeb06d PD |
1938 | /* According to BSpec, "The CD clock frequency must be at least twice |
1939 | * the frequency of the Azalia BCLK." and BCLK is 96 MHz by default. | |
8cbeb06d | 1940 | */ |
d305e061 VS |
1941 | if (crtc_state->has_audio && INTEL_GEN(dev_priv) >= 9) |
1942 | min_cdclk = max(2 * 96000, min_cdclk); | |
8cbeb06d | 1943 | |
c8dae55a HG |
1944 | /* |
1945 | * On Valleyview some DSI panels lose (v|h)sync when the clock is lower | |
1946 | * than 320000KHz. | |
1947 | */ | |
1948 | if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DSI) && | |
1949 | IS_VALLEYVIEW(dev_priv)) | |
1950 | min_cdclk = max(320000, min_cdclk); | |
1951 | ||
9c61de4c VS |
1952 | if (min_cdclk > dev_priv->max_cdclk_freq) { |
1953 | DRM_DEBUG_KMS("required cdclk (%d kHz) exceeds max (%d kHz)\n", | |
1954 | min_cdclk, dev_priv->max_cdclk_freq); | |
1955 | return -EINVAL; | |
1956 | } | |
1957 | ||
d305e061 | 1958 | return min_cdclk; |
7ff89ca2 VS |
1959 | } |
1960 | ||
d305e061 | 1961 | static int intel_compute_min_cdclk(struct drm_atomic_state *state) |
7ff89ca2 VS |
1962 | { |
1963 | struct intel_atomic_state *intel_state = to_intel_atomic_state(state); | |
1964 | struct drm_i915_private *dev_priv = to_i915(state->dev); | |
d305e061 | 1965 | struct intel_crtc *crtc; |
7ff89ca2 | 1966 | struct intel_crtc_state *crtc_state; |
9c61de4c | 1967 | int min_cdclk, i; |
7ff89ca2 VS |
1968 | enum pipe pipe; |
1969 | ||
d305e061 VS |
1970 | memcpy(intel_state->min_cdclk, dev_priv->min_cdclk, |
1971 | sizeof(intel_state->min_cdclk)); | |
7ff89ca2 | 1972 | |
9c61de4c VS |
1973 | for_each_new_intel_crtc_in_state(intel_state, crtc, crtc_state, i) { |
1974 | min_cdclk = intel_crtc_compute_min_cdclk(crtc_state); | |
1975 | if (min_cdclk < 0) | |
1976 | return min_cdclk; | |
1977 | ||
1978 | intel_state->min_cdclk[i] = min_cdclk; | |
1979 | } | |
7ff89ca2 | 1980 | |
9c61de4c | 1981 | min_cdclk = 0; |
7ff89ca2 | 1982 | for_each_pipe(dev_priv, pipe) |
d305e061 | 1983 | min_cdclk = max(intel_state->min_cdclk[pipe], min_cdclk); |
7ff89ca2 | 1984 | |
d305e061 | 1985 | return min_cdclk; |
7ff89ca2 VS |
1986 | } |
1987 | ||
53e9bf5e VS |
1988 | /* |
1989 | * Note that this functions assumes that 0 is | |
1990 | * the lowest voltage value, and higher values | |
1991 | * correspond to increasingly higher voltages. | |
1992 | * | |
1993 | * Should that relationship no longer hold on | |
1994 | * future platforms this code will need to be | |
1995 | * adjusted. | |
1996 | */ | |
1997 | static u8 cnl_compute_min_voltage_level(struct intel_atomic_state *state) | |
1998 | { | |
1999 | struct drm_i915_private *dev_priv = to_i915(state->base.dev); | |
2000 | struct intel_crtc *crtc; | |
2001 | struct intel_crtc_state *crtc_state; | |
2002 | u8 min_voltage_level; | |
2003 | int i; | |
2004 | enum pipe pipe; | |
2005 | ||
2006 | memcpy(state->min_voltage_level, dev_priv->min_voltage_level, | |
2007 | sizeof(state->min_voltage_level)); | |
2008 | ||
2009 | for_each_new_intel_crtc_in_state(state, crtc, crtc_state, i) { | |
2010 | if (crtc_state->base.enable) | |
2011 | state->min_voltage_level[i] = | |
2012 | crtc_state->min_voltage_level; | |
2013 | else | |
2014 | state->min_voltage_level[i] = 0; | |
2015 | } | |
2016 | ||
2017 | min_voltage_level = 0; | |
2018 | for_each_pipe(dev_priv, pipe) | |
2019 | min_voltage_level = max(state->min_voltage_level[pipe], | |
2020 | min_voltage_level); | |
2021 | ||
2022 | return min_voltage_level; | |
2023 | } | |
2024 | ||
7ff89ca2 VS |
2025 | static int vlv_modeset_calc_cdclk(struct drm_atomic_state *state) |
2026 | { | |
3d5dbb10 | 2027 | struct drm_i915_private *dev_priv = to_i915(state->dev); |
9c61de4c VS |
2028 | struct intel_atomic_state *intel_state = to_intel_atomic_state(state); |
2029 | int min_cdclk, cdclk; | |
bb0f4aab | 2030 | |
9c61de4c VS |
2031 | min_cdclk = intel_compute_min_cdclk(state); |
2032 | if (min_cdclk < 0) | |
2033 | return min_cdclk; | |
7ff89ca2 | 2034 | |
9c61de4c | 2035 | cdclk = vlv_calc_cdclk(dev_priv, min_cdclk); |
7ff89ca2 | 2036 | |
bb0f4aab | 2037 | intel_state->cdclk.logical.cdclk = cdclk; |
999c5766 VS |
2038 | intel_state->cdclk.logical.voltage_level = |
2039 | vlv_calc_voltage_level(dev_priv, cdclk); | |
bb0f4aab VS |
2040 | |
2041 | if (!intel_state->active_crtcs) { | |
2042 | cdclk = vlv_calc_cdclk(dev_priv, 0); | |
2043 | ||
2044 | intel_state->cdclk.actual.cdclk = cdclk; | |
999c5766 VS |
2045 | intel_state->cdclk.actual.voltage_level = |
2046 | vlv_calc_voltage_level(dev_priv, cdclk); | |
bb0f4aab VS |
2047 | } else { |
2048 | intel_state->cdclk.actual = | |
2049 | intel_state->cdclk.logical; | |
2050 | } | |
7ff89ca2 VS |
2051 | |
2052 | return 0; | |
2053 | } | |
2054 | ||
7ff89ca2 VS |
2055 | static int bdw_modeset_calc_cdclk(struct drm_atomic_state *state) |
2056 | { | |
7ff89ca2 | 2057 | struct intel_atomic_state *intel_state = to_intel_atomic_state(state); |
9c61de4c VS |
2058 | int min_cdclk, cdclk; |
2059 | ||
2060 | min_cdclk = intel_compute_min_cdclk(state); | |
2061 | if (min_cdclk < 0) | |
2062 | return min_cdclk; | |
7ff89ca2 VS |
2063 | |
2064 | /* | |
2065 | * FIXME should also account for plane ratio | |
2066 | * once 64bpp pixel formats are supported. | |
2067 | */ | |
d305e061 | 2068 | cdclk = bdw_calc_cdclk(min_cdclk); |
7ff89ca2 | 2069 | |
bb0f4aab | 2070 | intel_state->cdclk.logical.cdclk = cdclk; |
d7ffaeef VS |
2071 | intel_state->cdclk.logical.voltage_level = |
2072 | bdw_calc_voltage_level(cdclk); | |
bb0f4aab VS |
2073 | |
2074 | if (!intel_state->active_crtcs) { | |
2075 | cdclk = bdw_calc_cdclk(0); | |
2076 | ||
2077 | intel_state->cdclk.actual.cdclk = cdclk; | |
d7ffaeef VS |
2078 | intel_state->cdclk.actual.voltage_level = |
2079 | bdw_calc_voltage_level(cdclk); | |
bb0f4aab VS |
2080 | } else { |
2081 | intel_state->cdclk.actual = | |
2082 | intel_state->cdclk.logical; | |
2083 | } | |
7ff89ca2 VS |
2084 | |
2085 | return 0; | |
2086 | } | |
2087 | ||
7ff89ca2 VS |
2088 | static int skl_modeset_calc_cdclk(struct drm_atomic_state *state) |
2089 | { | |
7ff89ca2 | 2090 | struct drm_i915_private *dev_priv = to_i915(state->dev); |
9c61de4c VS |
2091 | struct intel_atomic_state *intel_state = to_intel_atomic_state(state); |
2092 | int min_cdclk, cdclk, vco; | |
2093 | ||
2094 | min_cdclk = intel_compute_min_cdclk(state); | |
2095 | if (min_cdclk < 0) | |
2096 | return min_cdclk; | |
bb0f4aab VS |
2097 | |
2098 | vco = intel_state->cdclk.logical.vco; | |
2099 | if (!vco) | |
2100 | vco = dev_priv->skl_preferred_vco_freq; | |
7ff89ca2 VS |
2101 | |
2102 | /* | |
2103 | * FIXME should also account for plane ratio | |
2104 | * once 64bpp pixel formats are supported. | |
2105 | */ | |
d305e061 | 2106 | cdclk = skl_calc_cdclk(min_cdclk, vco); |
7ff89ca2 | 2107 | |
bb0f4aab VS |
2108 | intel_state->cdclk.logical.vco = vco; |
2109 | intel_state->cdclk.logical.cdclk = cdclk; | |
2aa97491 VS |
2110 | intel_state->cdclk.logical.voltage_level = |
2111 | skl_calc_voltage_level(cdclk); | |
bb0f4aab VS |
2112 | |
2113 | if (!intel_state->active_crtcs) { | |
2114 | cdclk = skl_calc_cdclk(0, vco); | |
2115 | ||
2116 | intel_state->cdclk.actual.vco = vco; | |
2117 | intel_state->cdclk.actual.cdclk = cdclk; | |
2aa97491 VS |
2118 | intel_state->cdclk.actual.voltage_level = |
2119 | skl_calc_voltage_level(cdclk); | |
bb0f4aab VS |
2120 | } else { |
2121 | intel_state->cdclk.actual = | |
2122 | intel_state->cdclk.logical; | |
2123 | } | |
7ff89ca2 VS |
2124 | |
2125 | return 0; | |
2126 | } | |
2127 | ||
7ff89ca2 VS |
2128 | static int bxt_modeset_calc_cdclk(struct drm_atomic_state *state) |
2129 | { | |
2130 | struct drm_i915_private *dev_priv = to_i915(state->dev); | |
9c61de4c VS |
2131 | struct intel_atomic_state *intel_state = to_intel_atomic_state(state); |
2132 | int min_cdclk, cdclk, vco; | |
2133 | ||
2134 | min_cdclk = intel_compute_min_cdclk(state); | |
2135 | if (min_cdclk < 0) | |
2136 | return min_cdclk; | |
7ff89ca2 | 2137 | |
bb0f4aab | 2138 | if (IS_GEMINILAKE(dev_priv)) { |
d305e061 | 2139 | cdclk = glk_calc_cdclk(min_cdclk); |
bb0f4aab VS |
2140 | vco = glk_de_pll_vco(dev_priv, cdclk); |
2141 | } else { | |
d305e061 | 2142 | cdclk = bxt_calc_cdclk(min_cdclk); |
bb0f4aab VS |
2143 | vco = bxt_de_pll_vco(dev_priv, cdclk); |
2144 | } | |
2145 | ||
bb0f4aab VS |
2146 | intel_state->cdclk.logical.vco = vco; |
2147 | intel_state->cdclk.logical.cdclk = cdclk; | |
2123f442 VS |
2148 | intel_state->cdclk.logical.voltage_level = |
2149 | bxt_calc_voltage_level(cdclk); | |
7ff89ca2 VS |
2150 | |
2151 | if (!intel_state->active_crtcs) { | |
bb0f4aab | 2152 | if (IS_GEMINILAKE(dev_priv)) { |
7ff89ca2 | 2153 | cdclk = glk_calc_cdclk(0); |
bb0f4aab VS |
2154 | vco = glk_de_pll_vco(dev_priv, cdclk); |
2155 | } else { | |
7ff89ca2 | 2156 | cdclk = bxt_calc_cdclk(0); |
bb0f4aab VS |
2157 | vco = bxt_de_pll_vco(dev_priv, cdclk); |
2158 | } | |
7ff89ca2 | 2159 | |
bb0f4aab VS |
2160 | intel_state->cdclk.actual.vco = vco; |
2161 | intel_state->cdclk.actual.cdclk = cdclk; | |
2123f442 VS |
2162 | intel_state->cdclk.actual.voltage_level = |
2163 | bxt_calc_voltage_level(cdclk); | |
bb0f4aab VS |
2164 | } else { |
2165 | intel_state->cdclk.actual = | |
2166 | intel_state->cdclk.logical; | |
7ff89ca2 VS |
2167 | } |
2168 | ||
2169 | return 0; | |
2170 | } | |
2171 | ||
d1999e9e RV |
2172 | static int cnl_modeset_calc_cdclk(struct drm_atomic_state *state) |
2173 | { | |
2174 | struct drm_i915_private *dev_priv = to_i915(state->dev); | |
9c61de4c VS |
2175 | struct intel_atomic_state *intel_state = to_intel_atomic_state(state); |
2176 | int min_cdclk, cdclk, vco; | |
2177 | ||
2178 | min_cdclk = intel_compute_min_cdclk(state); | |
2179 | if (min_cdclk < 0) | |
2180 | return min_cdclk; | |
d1999e9e | 2181 | |
d305e061 | 2182 | cdclk = cnl_calc_cdclk(min_cdclk); |
d1999e9e RV |
2183 | vco = cnl_cdclk_pll_vco(dev_priv, cdclk); |
2184 | ||
d1999e9e RV |
2185 | intel_state->cdclk.logical.vco = vco; |
2186 | intel_state->cdclk.logical.cdclk = cdclk; | |
48469ece | 2187 | intel_state->cdclk.logical.voltage_level = |
53e9bf5e VS |
2188 | max(cnl_calc_voltage_level(cdclk), |
2189 | cnl_compute_min_voltage_level(intel_state)); | |
d1999e9e RV |
2190 | |
2191 | if (!intel_state->active_crtcs) { | |
2192 | cdclk = cnl_calc_cdclk(0); | |
2193 | vco = cnl_cdclk_pll_vco(dev_priv, cdclk); | |
2194 | ||
2195 | intel_state->cdclk.actual.vco = vco; | |
2196 | intel_state->cdclk.actual.cdclk = cdclk; | |
48469ece VS |
2197 | intel_state->cdclk.actual.voltage_level = |
2198 | cnl_calc_voltage_level(cdclk); | |
d1999e9e RV |
2199 | } else { |
2200 | intel_state->cdclk.actual = | |
2201 | intel_state->cdclk.logical; | |
2202 | } | |
2203 | ||
2204 | return 0; | |
2205 | } | |
2206 | ||
7ff89ca2 VS |
2207 | static int intel_compute_max_dotclk(struct drm_i915_private *dev_priv) |
2208 | { | |
2209 | int max_cdclk_freq = dev_priv->max_cdclk_freq; | |
2210 | ||
d305e061 | 2211 | if (INTEL_GEN(dev_priv) >= 10) |
43037c86 | 2212 | return 2 * max_cdclk_freq; |
d305e061 | 2213 | else if (IS_GEMINILAKE(dev_priv)) |
97f55ca5 MC |
2214 | /* |
2215 | * FIXME: Limiting to 99% as a temporary workaround. See | |
d305e061 | 2216 | * intel_min_cdclk() for details. |
97f55ca5 MC |
2217 | */ |
2218 | return 2 * max_cdclk_freq * 99 / 100; | |
d305e061 VS |
2219 | else if (IS_GEN9(dev_priv) || |
2220 | IS_BROADWELL(dev_priv) || IS_HASWELL(dev_priv)) | |
7ff89ca2 VS |
2221 | return max_cdclk_freq; |
2222 | else if (IS_CHERRYVIEW(dev_priv)) | |
2223 | return max_cdclk_freq*95/100; | |
2224 | else if (INTEL_INFO(dev_priv)->gen < 4) | |
2225 | return 2*max_cdclk_freq*90/100; | |
2226 | else | |
2227 | return max_cdclk_freq*90/100; | |
2228 | } | |
2229 | ||
2230 | /** | |
2231 | * intel_update_max_cdclk - Determine the maximum support CDCLK frequency | |
2232 | * @dev_priv: i915 device | |
2233 | * | |
2234 | * Determine the maximum CDCLK frequency the platform supports, and also | |
2235 | * derive the maximum dot clock frequency the maximum CDCLK frequency | |
2236 | * allows. | |
2237 | */ | |
2238 | void intel_update_max_cdclk(struct drm_i915_private *dev_priv) | |
2239 | { | |
d1999e9e RV |
2240 | if (IS_CANNONLAKE(dev_priv)) { |
2241 | dev_priv->max_cdclk_freq = 528000; | |
2242 | } else if (IS_GEN9_BC(dev_priv)) { | |
7ff89ca2 VS |
2243 | u32 limit = I915_READ(SKL_DFSM) & SKL_DFSM_CDCLK_LIMIT_MASK; |
2244 | int max_cdclk, vco; | |
2245 | ||
2246 | vco = dev_priv->skl_preferred_vco_freq; | |
2247 | WARN_ON(vco != 8100000 && vco != 8640000); | |
2248 | ||
2249 | /* | |
2250 | * Use the lower (vco 8640) cdclk values as a | |
2251 | * first guess. skl_calc_cdclk() will correct it | |
2252 | * if the preferred vco is 8100 instead. | |
2253 | */ | |
2254 | if (limit == SKL_DFSM_CDCLK_LIMIT_675) | |
2255 | max_cdclk = 617143; | |
2256 | else if (limit == SKL_DFSM_CDCLK_LIMIT_540) | |
2257 | max_cdclk = 540000; | |
2258 | else if (limit == SKL_DFSM_CDCLK_LIMIT_450) | |
2259 | max_cdclk = 432000; | |
2260 | else | |
2261 | max_cdclk = 308571; | |
2262 | ||
2263 | dev_priv->max_cdclk_freq = skl_calc_cdclk(max_cdclk, vco); | |
2264 | } else if (IS_GEMINILAKE(dev_priv)) { | |
2265 | dev_priv->max_cdclk_freq = 316800; | |
2266 | } else if (IS_BROXTON(dev_priv)) { | |
2267 | dev_priv->max_cdclk_freq = 624000; | |
2268 | } else if (IS_BROADWELL(dev_priv)) { | |
2269 | /* | |
2270 | * FIXME with extra cooling we can allow | |
2271 | * 540 MHz for ULX and 675 Mhz for ULT. | |
2272 | * How can we know if extra cooling is | |
2273 | * available? PCI ID, VTB, something else? | |
2274 | */ | |
2275 | if (I915_READ(FUSE_STRAP) & HSW_CDCLK_LIMIT) | |
2276 | dev_priv->max_cdclk_freq = 450000; | |
2277 | else if (IS_BDW_ULX(dev_priv)) | |
2278 | dev_priv->max_cdclk_freq = 450000; | |
2279 | else if (IS_BDW_ULT(dev_priv)) | |
2280 | dev_priv->max_cdclk_freq = 540000; | |
2281 | else | |
2282 | dev_priv->max_cdclk_freq = 675000; | |
2283 | } else if (IS_CHERRYVIEW(dev_priv)) { | |
2284 | dev_priv->max_cdclk_freq = 320000; | |
2285 | } else if (IS_VALLEYVIEW(dev_priv)) { | |
2286 | dev_priv->max_cdclk_freq = 400000; | |
2287 | } else { | |
2288 | /* otherwise assume cdclk is fixed */ | |
49cd97a3 | 2289 | dev_priv->max_cdclk_freq = dev_priv->cdclk.hw.cdclk; |
7ff89ca2 VS |
2290 | } |
2291 | ||
2292 | dev_priv->max_dotclk_freq = intel_compute_max_dotclk(dev_priv); | |
2293 | ||
2294 | DRM_DEBUG_DRIVER("Max CD clock rate: %d kHz\n", | |
2295 | dev_priv->max_cdclk_freq); | |
2296 | ||
2297 | DRM_DEBUG_DRIVER("Max dotclock rate: %d kHz\n", | |
2298 | dev_priv->max_dotclk_freq); | |
2299 | } | |
2300 | ||
2301 | /** | |
2302 | * intel_update_cdclk - Determine the current CDCLK frequency | |
2303 | * @dev_priv: i915 device | |
2304 | * | |
2305 | * Determine the current CDCLK frequency. | |
2306 | */ | |
2307 | void intel_update_cdclk(struct drm_i915_private *dev_priv) | |
2308 | { | |
49cd97a3 | 2309 | dev_priv->display.get_cdclk(dev_priv, &dev_priv->cdclk.hw); |
7ff89ca2 | 2310 | |
7ff89ca2 VS |
2311 | /* |
2312 | * 9:0 CMBUS [sic] CDCLK frequency (cdfreq): | |
2313 | * Programmng [sic] note: bit[9:2] should be programmed to the number | |
2314 | * of cdclk that generates 4MHz reference clock freq which is used to | |
2315 | * generate GMBus clock. This will vary with the cdclk freq. | |
2316 | */ | |
2317 | if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) | |
2318 | I915_WRITE(GMBUSFREQ_VLV, | |
49cd97a3 | 2319 | DIV_ROUND_UP(dev_priv->cdclk.hw.cdclk, 1000)); |
7ff89ca2 VS |
2320 | } |
2321 | ||
9d81a997 RV |
2322 | static int cnp_rawclk(struct drm_i915_private *dev_priv) |
2323 | { | |
2324 | u32 rawclk; | |
2325 | int divider, fraction; | |
2326 | ||
2327 | if (I915_READ(SFUSE_STRAP) & SFUSE_STRAP_RAW_FREQUENCY) { | |
2328 | /* 24 MHz */ | |
2329 | divider = 24000; | |
2330 | fraction = 0; | |
2331 | } else { | |
2332 | /* 19.2 MHz */ | |
2333 | divider = 19000; | |
2334 | fraction = 200; | |
2335 | } | |
2336 | ||
2337 | rawclk = CNP_RAWCLK_DIV((divider / 1000) - 1); | |
2338 | if (fraction) | |
2339 | rawclk |= CNP_RAWCLK_FRAC(DIV_ROUND_CLOSEST(1000, | |
2340 | fraction) - 1); | |
2341 | ||
2342 | I915_WRITE(PCH_RAWCLK_FREQ, rawclk); | |
2343 | return divider + fraction; | |
2344 | } | |
2345 | ||
4ef99abd AS |
2346 | static int icp_rawclk(struct drm_i915_private *dev_priv) |
2347 | { | |
2348 | u32 rawclk; | |
2349 | int divider, numerator, denominator, frequency; | |
2350 | ||
2351 | if (I915_READ(SFUSE_STRAP) & SFUSE_STRAP_RAW_FREQUENCY) { | |
2352 | frequency = 24000; | |
2353 | divider = 23; | |
2354 | numerator = 0; | |
2355 | denominator = 0; | |
2356 | } else { | |
2357 | frequency = 19200; | |
2358 | divider = 18; | |
2359 | numerator = 1; | |
2360 | denominator = 4; | |
2361 | } | |
2362 | ||
2363 | rawclk = CNP_RAWCLK_DIV(divider) | ICP_RAWCLK_NUM(numerator) | | |
2364 | ICP_RAWCLK_DEN(denominator); | |
2365 | ||
2366 | I915_WRITE(PCH_RAWCLK_FREQ, rawclk); | |
2367 | return frequency; | |
2368 | } | |
2369 | ||
7ff89ca2 VS |
2370 | static int pch_rawclk(struct drm_i915_private *dev_priv) |
2371 | { | |
2372 | return (I915_READ(PCH_RAWCLK_FREQ) & RAWCLK_FREQ_MASK) * 1000; | |
2373 | } | |
2374 | ||
2375 | static int vlv_hrawclk(struct drm_i915_private *dev_priv) | |
2376 | { | |
2377 | /* RAWCLK_FREQ_VLV register updated from power well code */ | |
2378 | return vlv_get_cck_clock_hpll(dev_priv, "hrawclk", | |
2379 | CCK_DISPLAY_REF_CLOCK_CONTROL); | |
2380 | } | |
2381 | ||
2382 | static int g4x_hrawclk(struct drm_i915_private *dev_priv) | |
2383 | { | |
2384 | uint32_t clkcfg; | |
2385 | ||
2386 | /* hrawclock is 1/4 the FSB frequency */ | |
2387 | clkcfg = I915_READ(CLKCFG); | |
2388 | switch (clkcfg & CLKCFG_FSB_MASK) { | |
2389 | case CLKCFG_FSB_400: | |
2390 | return 100000; | |
2391 | case CLKCFG_FSB_533: | |
2392 | return 133333; | |
2393 | case CLKCFG_FSB_667: | |
2394 | return 166667; | |
2395 | case CLKCFG_FSB_800: | |
2396 | return 200000; | |
2397 | case CLKCFG_FSB_1067: | |
6f38123e | 2398 | case CLKCFG_FSB_1067_ALT: |
7ff89ca2 VS |
2399 | return 266667; |
2400 | case CLKCFG_FSB_1333: | |
6f38123e | 2401 | case CLKCFG_FSB_1333_ALT: |
7ff89ca2 | 2402 | return 333333; |
7ff89ca2 VS |
2403 | default: |
2404 | return 133333; | |
2405 | } | |
2406 | } | |
2407 | ||
2408 | /** | |
2409 | * intel_update_rawclk - Determine the current RAWCLK frequency | |
2410 | * @dev_priv: i915 device | |
2411 | * | |
2412 | * Determine the current RAWCLK frequency. RAWCLK is a fixed | |
2413 | * frequency clock so this needs to done only once. | |
2414 | */ | |
2415 | void intel_update_rawclk(struct drm_i915_private *dev_priv) | |
2416 | { | |
4ef99abd AS |
2417 | if (HAS_PCH_ICP(dev_priv)) |
2418 | dev_priv->rawclk_freq = icp_rawclk(dev_priv); | |
2419 | else if (HAS_PCH_CNP(dev_priv)) | |
9d81a997 RV |
2420 | dev_priv->rawclk_freq = cnp_rawclk(dev_priv); |
2421 | else if (HAS_PCH_SPLIT(dev_priv)) | |
7ff89ca2 VS |
2422 | dev_priv->rawclk_freq = pch_rawclk(dev_priv); |
2423 | else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) | |
2424 | dev_priv->rawclk_freq = vlv_hrawclk(dev_priv); | |
2425 | else if (IS_G4X(dev_priv) || IS_PINEVIEW(dev_priv)) | |
2426 | dev_priv->rawclk_freq = g4x_hrawclk(dev_priv); | |
2427 | else | |
2428 | /* no rawclk on other platforms, or no need to know it */ | |
2429 | return; | |
2430 | ||
2431 | DRM_DEBUG_DRIVER("rawclk rate: %d kHz\n", dev_priv->rawclk_freq); | |
2432 | } | |
2433 | ||
2434 | /** | |
2435 | * intel_init_cdclk_hooks - Initialize CDCLK related modesetting hooks | |
2436 | * @dev_priv: i915 device | |
2437 | */ | |
2438 | void intel_init_cdclk_hooks(struct drm_i915_private *dev_priv) | |
2439 | { | |
b0587e4d VS |
2440 | if (IS_CHERRYVIEW(dev_priv)) { |
2441 | dev_priv->display.set_cdclk = chv_set_cdclk; | |
2442 | dev_priv->display.modeset_calc_cdclk = | |
2443 | vlv_modeset_calc_cdclk; | |
2444 | } else if (IS_VALLEYVIEW(dev_priv)) { | |
2445 | dev_priv->display.set_cdclk = vlv_set_cdclk; | |
7ff89ca2 VS |
2446 | dev_priv->display.modeset_calc_cdclk = |
2447 | vlv_modeset_calc_cdclk; | |
2448 | } else if (IS_BROADWELL(dev_priv)) { | |
b0587e4d | 2449 | dev_priv->display.set_cdclk = bdw_set_cdclk; |
7ff89ca2 VS |
2450 | dev_priv->display.modeset_calc_cdclk = |
2451 | bdw_modeset_calc_cdclk; | |
2452 | } else if (IS_GEN9_LP(dev_priv)) { | |
b0587e4d | 2453 | dev_priv->display.set_cdclk = bxt_set_cdclk; |
7ff89ca2 VS |
2454 | dev_priv->display.modeset_calc_cdclk = |
2455 | bxt_modeset_calc_cdclk; | |
2456 | } else if (IS_GEN9_BC(dev_priv)) { | |
b0587e4d | 2457 | dev_priv->display.set_cdclk = skl_set_cdclk; |
7ff89ca2 VS |
2458 | dev_priv->display.modeset_calc_cdclk = |
2459 | skl_modeset_calc_cdclk; | |
d1999e9e RV |
2460 | } else if (IS_CANNONLAKE(dev_priv)) { |
2461 | dev_priv->display.set_cdclk = cnl_set_cdclk; | |
2462 | dev_priv->display.modeset_calc_cdclk = | |
2463 | cnl_modeset_calc_cdclk; | |
7ff89ca2 VS |
2464 | } |
2465 | ||
945f2672 VS |
2466 | if (IS_CANNONLAKE(dev_priv)) |
2467 | dev_priv->display.get_cdclk = cnl_get_cdclk; | |
2468 | else if (IS_GEN9_BC(dev_priv)) | |
7ff89ca2 VS |
2469 | dev_priv->display.get_cdclk = skl_get_cdclk; |
2470 | else if (IS_GEN9_LP(dev_priv)) | |
2471 | dev_priv->display.get_cdclk = bxt_get_cdclk; | |
2472 | else if (IS_BROADWELL(dev_priv)) | |
2473 | dev_priv->display.get_cdclk = bdw_get_cdclk; | |
2474 | else if (IS_HASWELL(dev_priv)) | |
2475 | dev_priv->display.get_cdclk = hsw_get_cdclk; | |
2476 | else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) | |
2477 | dev_priv->display.get_cdclk = vlv_get_cdclk; | |
2478 | else if (IS_GEN6(dev_priv) || IS_IVYBRIDGE(dev_priv)) | |
2479 | dev_priv->display.get_cdclk = fixed_400mhz_get_cdclk; | |
2480 | else if (IS_GEN5(dev_priv)) | |
2481 | dev_priv->display.get_cdclk = fixed_450mhz_get_cdclk; | |
2482 | else if (IS_GM45(dev_priv)) | |
2483 | dev_priv->display.get_cdclk = gm45_get_cdclk; | |
6b9e441d | 2484 | else if (IS_G45(dev_priv)) |
7ff89ca2 VS |
2485 | dev_priv->display.get_cdclk = g33_get_cdclk; |
2486 | else if (IS_I965GM(dev_priv)) | |
2487 | dev_priv->display.get_cdclk = i965gm_get_cdclk; | |
2488 | else if (IS_I965G(dev_priv)) | |
2489 | dev_priv->display.get_cdclk = fixed_400mhz_get_cdclk; | |
2490 | else if (IS_PINEVIEW(dev_priv)) | |
2491 | dev_priv->display.get_cdclk = pnv_get_cdclk; | |
2492 | else if (IS_G33(dev_priv)) | |
2493 | dev_priv->display.get_cdclk = g33_get_cdclk; | |
2494 | else if (IS_I945GM(dev_priv)) | |
2495 | dev_priv->display.get_cdclk = i945gm_get_cdclk; | |
2496 | else if (IS_I945G(dev_priv)) | |
2497 | dev_priv->display.get_cdclk = fixed_400mhz_get_cdclk; | |
2498 | else if (IS_I915GM(dev_priv)) | |
2499 | dev_priv->display.get_cdclk = i915gm_get_cdclk; | |
2500 | else if (IS_I915G(dev_priv)) | |
2501 | dev_priv->display.get_cdclk = fixed_333mhz_get_cdclk; | |
2502 | else if (IS_I865G(dev_priv)) | |
2503 | dev_priv->display.get_cdclk = fixed_266mhz_get_cdclk; | |
2504 | else if (IS_I85X(dev_priv)) | |
2505 | dev_priv->display.get_cdclk = i85x_get_cdclk; | |
2506 | else if (IS_I845G(dev_priv)) | |
2507 | dev_priv->display.get_cdclk = fixed_200mhz_get_cdclk; | |
2508 | else { /* 830 */ | |
2509 | WARN(!IS_I830(dev_priv), | |
2510 | "Unknown platform. Assuming 133 MHz CDCLK\n"); | |
2511 | dev_priv->display.get_cdclk = fixed_133mhz_get_cdclk; | |
2512 | } | |
2513 | } |