Commit | Line | Data |
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7ff89ca2 VS |
1 | /* |
2 | * Copyright © 2006-2017 Intel Corporation | |
3 | * | |
4 | * Permission is hereby granted, free of charge, to any person obtaining a | |
5 | * copy of this software and associated documentation files (the "Software"), | |
6 | * to deal in the Software without restriction, including without limitation | |
7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
8 | * and/or sell copies of the Software, and to permit persons to whom the | |
9 | * Software is furnished to do so, subject to the following conditions: | |
10 | * | |
11 | * The above copyright notice and this permission notice (including the next | |
12 | * paragraph) shall be included in all copies or substantial portions of the | |
13 | * Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | |
21 | * DEALINGS IN THE SOFTWARE. | |
22 | */ | |
23 | ||
cd191546 | 24 | #include <linux/time.h> |
cac91e67 | 25 | |
fe4709a8 | 26 | #include "intel_atomic.h" |
cac91e67 | 27 | #include "intel_bw.h" |
e7674ef6 | 28 | #include "intel_cdclk.h" |
1d455f8d | 29 | #include "intel_display_types.h" |
56c5098f | 30 | #include "intel_sideband.h" |
7ff89ca2 VS |
31 | |
32 | /** | |
33 | * DOC: CDCLK / RAWCLK | |
34 | * | |
35 | * The display engine uses several different clocks to do its work. There | |
36 | * are two main clocks involved that aren't directly related to the actual | |
37 | * pixel clock or any symbol/bit clock of the actual output port. These | |
38 | * are the core display clock (CDCLK) and RAWCLK. | |
39 | * | |
40 | * CDCLK clocks most of the display pipe logic, and thus its frequency | |
41 | * must be high enough to support the rate at which pixels are flowing | |
42 | * through the pipes. Downscaling must also be accounted as that increases | |
43 | * the effective pixel rate. | |
44 | * | |
45 | * On several platforms the CDCLK frequency can be changed dynamically | |
46 | * to minimize power consumption for a given display configuration. | |
47 | * Typically changes to the CDCLK frequency require all the display pipes | |
48 | * to be shut down while the frequency is being changed. | |
49 | * | |
50 | * On SKL+ the DMC will toggle the CDCLK off/on during DC5/6 entry/exit. | |
51 | * DMC will not change the active CDCLK frequency however, so that part | |
52 | * will still be performed by the driver directly. | |
53 | * | |
54 | * RAWCLK is a fixed frequency clock, often used by various auxiliary | |
55 | * blocks such as AUX CH or backlight PWM. Hence the only thing we | |
56 | * really need to know about RAWCLK is its frequency so that various | |
57 | * dividers can be programmed correctly. | |
58 | */ | |
59 | ||
49cd97a3 | 60 | static void fixed_133mhz_get_cdclk(struct drm_i915_private *dev_priv, |
0bb94e03 | 61 | struct intel_cdclk_config *cdclk_config) |
7ff89ca2 | 62 | { |
0bb94e03 | 63 | cdclk_config->cdclk = 133333; |
7ff89ca2 VS |
64 | } |
65 | ||
49cd97a3 | 66 | static void fixed_200mhz_get_cdclk(struct drm_i915_private *dev_priv, |
0bb94e03 | 67 | struct intel_cdclk_config *cdclk_config) |
7ff89ca2 | 68 | { |
0bb94e03 | 69 | cdclk_config->cdclk = 200000; |
7ff89ca2 VS |
70 | } |
71 | ||
49cd97a3 | 72 | static void fixed_266mhz_get_cdclk(struct drm_i915_private *dev_priv, |
0bb94e03 | 73 | struct intel_cdclk_config *cdclk_config) |
7ff89ca2 | 74 | { |
0bb94e03 | 75 | cdclk_config->cdclk = 266667; |
7ff89ca2 VS |
76 | } |
77 | ||
49cd97a3 | 78 | static void fixed_333mhz_get_cdclk(struct drm_i915_private *dev_priv, |
0bb94e03 | 79 | struct intel_cdclk_config *cdclk_config) |
7ff89ca2 | 80 | { |
0bb94e03 | 81 | cdclk_config->cdclk = 333333; |
7ff89ca2 VS |
82 | } |
83 | ||
49cd97a3 | 84 | static void fixed_400mhz_get_cdclk(struct drm_i915_private *dev_priv, |
0bb94e03 | 85 | struct intel_cdclk_config *cdclk_config) |
7ff89ca2 | 86 | { |
0bb94e03 | 87 | cdclk_config->cdclk = 400000; |
7ff89ca2 VS |
88 | } |
89 | ||
49cd97a3 | 90 | static void fixed_450mhz_get_cdclk(struct drm_i915_private *dev_priv, |
0bb94e03 | 91 | struct intel_cdclk_config *cdclk_config) |
7ff89ca2 | 92 | { |
0bb94e03 | 93 | cdclk_config->cdclk = 450000; |
7ff89ca2 VS |
94 | } |
95 | ||
49cd97a3 | 96 | static void i85x_get_cdclk(struct drm_i915_private *dev_priv, |
0bb94e03 | 97 | struct intel_cdclk_config *cdclk_config) |
7ff89ca2 VS |
98 | { |
99 | struct pci_dev *pdev = dev_priv->drm.pdev; | |
100 | u16 hpllcc = 0; | |
101 | ||
102 | /* | |
103 | * 852GM/852GMV only supports 133 MHz and the HPLLCC | |
104 | * encoding is different :( | |
105 | * FIXME is this the right way to detect 852GM/852GMV? | |
106 | */ | |
49cd97a3 | 107 | if (pdev->revision == 0x1) { |
0bb94e03 | 108 | cdclk_config->cdclk = 133333; |
49cd97a3 VS |
109 | return; |
110 | } | |
7ff89ca2 VS |
111 | |
112 | pci_bus_read_config_word(pdev->bus, | |
113 | PCI_DEVFN(0, 3), HPLLCC, &hpllcc); | |
114 | ||
115 | /* Assume that the hardware is in the high speed state. This | |
116 | * should be the default. | |
117 | */ | |
118 | switch (hpllcc & GC_CLOCK_CONTROL_MASK) { | |
119 | case GC_CLOCK_133_200: | |
120 | case GC_CLOCK_133_200_2: | |
121 | case GC_CLOCK_100_200: | |
0bb94e03 | 122 | cdclk_config->cdclk = 200000; |
49cd97a3 | 123 | break; |
7ff89ca2 | 124 | case GC_CLOCK_166_250: |
0bb94e03 | 125 | cdclk_config->cdclk = 250000; |
49cd97a3 | 126 | break; |
7ff89ca2 | 127 | case GC_CLOCK_100_133: |
0bb94e03 | 128 | cdclk_config->cdclk = 133333; |
49cd97a3 | 129 | break; |
7ff89ca2 VS |
130 | case GC_CLOCK_133_266: |
131 | case GC_CLOCK_133_266_2: | |
132 | case GC_CLOCK_166_266: | |
0bb94e03 | 133 | cdclk_config->cdclk = 266667; |
49cd97a3 | 134 | break; |
7ff89ca2 | 135 | } |
7ff89ca2 VS |
136 | } |
137 | ||
49cd97a3 | 138 | static void i915gm_get_cdclk(struct drm_i915_private *dev_priv, |
0bb94e03 | 139 | struct intel_cdclk_config *cdclk_config) |
7ff89ca2 VS |
140 | { |
141 | struct pci_dev *pdev = dev_priv->drm.pdev; | |
142 | u16 gcfgc = 0; | |
143 | ||
144 | pci_read_config_word(pdev, GCFGC, &gcfgc); | |
145 | ||
49cd97a3 | 146 | if (gcfgc & GC_LOW_FREQUENCY_ENABLE) { |
0bb94e03 | 147 | cdclk_config->cdclk = 133333; |
49cd97a3 VS |
148 | return; |
149 | } | |
7ff89ca2 VS |
150 | |
151 | switch (gcfgc & GC_DISPLAY_CLOCK_MASK) { | |
152 | case GC_DISPLAY_CLOCK_333_320_MHZ: | |
0bb94e03 | 153 | cdclk_config->cdclk = 333333; |
49cd97a3 | 154 | break; |
7ff89ca2 VS |
155 | default: |
156 | case GC_DISPLAY_CLOCK_190_200_MHZ: | |
0bb94e03 | 157 | cdclk_config->cdclk = 190000; |
49cd97a3 | 158 | break; |
7ff89ca2 VS |
159 | } |
160 | } | |
161 | ||
49cd97a3 | 162 | static void i945gm_get_cdclk(struct drm_i915_private *dev_priv, |
0bb94e03 | 163 | struct intel_cdclk_config *cdclk_config) |
7ff89ca2 VS |
164 | { |
165 | struct pci_dev *pdev = dev_priv->drm.pdev; | |
166 | u16 gcfgc = 0; | |
167 | ||
168 | pci_read_config_word(pdev, GCFGC, &gcfgc); | |
169 | ||
49cd97a3 | 170 | if (gcfgc & GC_LOW_FREQUENCY_ENABLE) { |
0bb94e03 | 171 | cdclk_config->cdclk = 133333; |
49cd97a3 VS |
172 | return; |
173 | } | |
7ff89ca2 VS |
174 | |
175 | switch (gcfgc & GC_DISPLAY_CLOCK_MASK) { | |
176 | case GC_DISPLAY_CLOCK_333_320_MHZ: | |
0bb94e03 | 177 | cdclk_config->cdclk = 320000; |
49cd97a3 | 178 | break; |
7ff89ca2 VS |
179 | default: |
180 | case GC_DISPLAY_CLOCK_190_200_MHZ: | |
0bb94e03 | 181 | cdclk_config->cdclk = 200000; |
49cd97a3 | 182 | break; |
7ff89ca2 VS |
183 | } |
184 | } | |
185 | ||
186 | static unsigned int intel_hpll_vco(struct drm_i915_private *dev_priv) | |
187 | { | |
188 | static const unsigned int blb_vco[8] = { | |
189 | [0] = 3200000, | |
190 | [1] = 4000000, | |
191 | [2] = 5333333, | |
192 | [3] = 4800000, | |
193 | [4] = 6400000, | |
194 | }; | |
195 | static const unsigned int pnv_vco[8] = { | |
196 | [0] = 3200000, | |
197 | [1] = 4000000, | |
198 | [2] = 5333333, | |
199 | [3] = 4800000, | |
200 | [4] = 2666667, | |
201 | }; | |
202 | static const unsigned int cl_vco[8] = { | |
203 | [0] = 3200000, | |
204 | [1] = 4000000, | |
205 | [2] = 5333333, | |
206 | [3] = 6400000, | |
207 | [4] = 3333333, | |
208 | [5] = 3566667, | |
209 | [6] = 4266667, | |
210 | }; | |
211 | static const unsigned int elk_vco[8] = { | |
212 | [0] = 3200000, | |
213 | [1] = 4000000, | |
214 | [2] = 5333333, | |
215 | [3] = 4800000, | |
216 | }; | |
217 | static const unsigned int ctg_vco[8] = { | |
218 | [0] = 3200000, | |
219 | [1] = 4000000, | |
220 | [2] = 5333333, | |
221 | [3] = 6400000, | |
222 | [4] = 2666667, | |
223 | [5] = 4266667, | |
224 | }; | |
225 | const unsigned int *vco_table; | |
226 | unsigned int vco; | |
cbe974fb | 227 | u8 tmp = 0; |
7ff89ca2 VS |
228 | |
229 | /* FIXME other chipsets? */ | |
230 | if (IS_GM45(dev_priv)) | |
231 | vco_table = ctg_vco; | |
6b9e441d | 232 | else if (IS_G45(dev_priv)) |
7ff89ca2 VS |
233 | vco_table = elk_vco; |
234 | else if (IS_I965GM(dev_priv)) | |
235 | vco_table = cl_vco; | |
236 | else if (IS_PINEVIEW(dev_priv)) | |
237 | vco_table = pnv_vco; | |
238 | else if (IS_G33(dev_priv)) | |
239 | vco_table = blb_vco; | |
240 | else | |
241 | return 0; | |
242 | ||
3e9f55df JN |
243 | tmp = intel_de_read(dev_priv, |
244 | IS_PINEVIEW(dev_priv) || IS_MOBILE(dev_priv) ? HPLLVCO_MOBILE : HPLLVCO); | |
7ff89ca2 VS |
245 | |
246 | vco = vco_table[tmp & 0x7]; | |
247 | if (vco == 0) | |
23194610 WK |
248 | drm_err(&dev_priv->drm, "Bad HPLL VCO (HPLLVCO=0x%02x)\n", |
249 | tmp); | |
7ff89ca2 | 250 | else |
23194610 | 251 | drm_dbg_kms(&dev_priv->drm, "HPLL VCO %u kHz\n", vco); |
7ff89ca2 VS |
252 | |
253 | return vco; | |
254 | } | |
255 | ||
49cd97a3 | 256 | static void g33_get_cdclk(struct drm_i915_private *dev_priv, |
0bb94e03 | 257 | struct intel_cdclk_config *cdclk_config) |
7ff89ca2 VS |
258 | { |
259 | struct pci_dev *pdev = dev_priv->drm.pdev; | |
cbe974fb JN |
260 | static const u8 div_3200[] = { 12, 10, 8, 7, 5, 16 }; |
261 | static const u8 div_4000[] = { 14, 12, 10, 8, 6, 20 }; | |
262 | static const u8 div_4800[] = { 20, 14, 12, 10, 8, 24 }; | |
263 | static const u8 div_5333[] = { 20, 16, 12, 12, 8, 28 }; | |
264 | const u8 *div_table; | |
49cd97a3 | 265 | unsigned int cdclk_sel; |
cbe974fb | 266 | u16 tmp = 0; |
7ff89ca2 | 267 | |
0bb94e03 | 268 | cdclk_config->vco = intel_hpll_vco(dev_priv); |
49cd97a3 | 269 | |
7ff89ca2 VS |
270 | pci_read_config_word(pdev, GCFGC, &tmp); |
271 | ||
272 | cdclk_sel = (tmp >> 4) & 0x7; | |
273 | ||
274 | if (cdclk_sel >= ARRAY_SIZE(div_3200)) | |
275 | goto fail; | |
276 | ||
0bb94e03 | 277 | switch (cdclk_config->vco) { |
7ff89ca2 VS |
278 | case 3200000: |
279 | div_table = div_3200; | |
280 | break; | |
281 | case 4000000: | |
282 | div_table = div_4000; | |
283 | break; | |
284 | case 4800000: | |
285 | div_table = div_4800; | |
286 | break; | |
287 | case 5333333: | |
288 | div_table = div_5333; | |
289 | break; | |
290 | default: | |
291 | goto fail; | |
292 | } | |
293 | ||
0bb94e03 VS |
294 | cdclk_config->cdclk = DIV_ROUND_CLOSEST(cdclk_config->vco, |
295 | div_table[cdclk_sel]); | |
49cd97a3 | 296 | return; |
7ff89ca2 VS |
297 | |
298 | fail: | |
23194610 WK |
299 | drm_err(&dev_priv->drm, |
300 | "Unable to determine CDCLK. HPLL VCO=%u kHz, CFGC=0x%08x\n", | |
0bb94e03 VS |
301 | cdclk_config->vco, tmp); |
302 | cdclk_config->cdclk = 190476; | |
7ff89ca2 VS |
303 | } |
304 | ||
49cd97a3 | 305 | static void pnv_get_cdclk(struct drm_i915_private *dev_priv, |
0bb94e03 | 306 | struct intel_cdclk_config *cdclk_config) |
7ff89ca2 VS |
307 | { |
308 | struct pci_dev *pdev = dev_priv->drm.pdev; | |
309 | u16 gcfgc = 0; | |
310 | ||
311 | pci_read_config_word(pdev, GCFGC, &gcfgc); | |
312 | ||
313 | switch (gcfgc & GC_DISPLAY_CLOCK_MASK) { | |
314 | case GC_DISPLAY_CLOCK_267_MHZ_PNV: | |
0bb94e03 | 315 | cdclk_config->cdclk = 266667; |
49cd97a3 | 316 | break; |
7ff89ca2 | 317 | case GC_DISPLAY_CLOCK_333_MHZ_PNV: |
0bb94e03 | 318 | cdclk_config->cdclk = 333333; |
49cd97a3 | 319 | break; |
7ff89ca2 | 320 | case GC_DISPLAY_CLOCK_444_MHZ_PNV: |
0bb94e03 | 321 | cdclk_config->cdclk = 444444; |
49cd97a3 | 322 | break; |
7ff89ca2 | 323 | case GC_DISPLAY_CLOCK_200_MHZ_PNV: |
0bb94e03 | 324 | cdclk_config->cdclk = 200000; |
49cd97a3 | 325 | break; |
7ff89ca2 | 326 | default: |
23194610 WK |
327 | drm_err(&dev_priv->drm, |
328 | "Unknown pnv display core clock 0x%04x\n", gcfgc); | |
f0d759f0 | 329 | /* fall through */ |
7ff89ca2 | 330 | case GC_DISPLAY_CLOCK_133_MHZ_PNV: |
0bb94e03 | 331 | cdclk_config->cdclk = 133333; |
49cd97a3 | 332 | break; |
7ff89ca2 | 333 | case GC_DISPLAY_CLOCK_167_MHZ_PNV: |
0bb94e03 | 334 | cdclk_config->cdclk = 166667; |
49cd97a3 | 335 | break; |
7ff89ca2 VS |
336 | } |
337 | } | |
338 | ||
49cd97a3 | 339 | static void i965gm_get_cdclk(struct drm_i915_private *dev_priv, |
0bb94e03 | 340 | struct intel_cdclk_config *cdclk_config) |
7ff89ca2 VS |
341 | { |
342 | struct pci_dev *pdev = dev_priv->drm.pdev; | |
cbe974fb JN |
343 | static const u8 div_3200[] = { 16, 10, 8 }; |
344 | static const u8 div_4000[] = { 20, 12, 10 }; | |
345 | static const u8 div_5333[] = { 24, 16, 14 }; | |
346 | const u8 *div_table; | |
49cd97a3 | 347 | unsigned int cdclk_sel; |
cbe974fb | 348 | u16 tmp = 0; |
7ff89ca2 | 349 | |
0bb94e03 | 350 | cdclk_config->vco = intel_hpll_vco(dev_priv); |
49cd97a3 | 351 | |
7ff89ca2 VS |
352 | pci_read_config_word(pdev, GCFGC, &tmp); |
353 | ||
354 | cdclk_sel = ((tmp >> 8) & 0x1f) - 1; | |
355 | ||
356 | if (cdclk_sel >= ARRAY_SIZE(div_3200)) | |
357 | goto fail; | |
358 | ||
0bb94e03 | 359 | switch (cdclk_config->vco) { |
7ff89ca2 VS |
360 | case 3200000: |
361 | div_table = div_3200; | |
362 | break; | |
363 | case 4000000: | |
364 | div_table = div_4000; | |
365 | break; | |
366 | case 5333333: | |
367 | div_table = div_5333; | |
368 | break; | |
369 | default: | |
370 | goto fail; | |
371 | } | |
372 | ||
0bb94e03 VS |
373 | cdclk_config->cdclk = DIV_ROUND_CLOSEST(cdclk_config->vco, |
374 | div_table[cdclk_sel]); | |
49cd97a3 | 375 | return; |
7ff89ca2 VS |
376 | |
377 | fail: | |
23194610 WK |
378 | drm_err(&dev_priv->drm, |
379 | "Unable to determine CDCLK. HPLL VCO=%u kHz, CFGC=0x%04x\n", | |
0bb94e03 VS |
380 | cdclk_config->vco, tmp); |
381 | cdclk_config->cdclk = 200000; | |
7ff89ca2 VS |
382 | } |
383 | ||
49cd97a3 | 384 | static void gm45_get_cdclk(struct drm_i915_private *dev_priv, |
0bb94e03 | 385 | struct intel_cdclk_config *cdclk_config) |
7ff89ca2 VS |
386 | { |
387 | struct pci_dev *pdev = dev_priv->drm.pdev; | |
49cd97a3 | 388 | unsigned int cdclk_sel; |
cbe974fb | 389 | u16 tmp = 0; |
7ff89ca2 | 390 | |
0bb94e03 | 391 | cdclk_config->vco = intel_hpll_vco(dev_priv); |
49cd97a3 | 392 | |
7ff89ca2 VS |
393 | pci_read_config_word(pdev, GCFGC, &tmp); |
394 | ||
395 | cdclk_sel = (tmp >> 12) & 0x1; | |
396 | ||
0bb94e03 | 397 | switch (cdclk_config->vco) { |
7ff89ca2 VS |
398 | case 2666667: |
399 | case 4000000: | |
400 | case 5333333: | |
0bb94e03 | 401 | cdclk_config->cdclk = cdclk_sel ? 333333 : 222222; |
49cd97a3 | 402 | break; |
7ff89ca2 | 403 | case 3200000: |
0bb94e03 | 404 | cdclk_config->cdclk = cdclk_sel ? 320000 : 228571; |
49cd97a3 | 405 | break; |
7ff89ca2 | 406 | default: |
23194610 WK |
407 | drm_err(&dev_priv->drm, |
408 | "Unable to determine CDCLK. HPLL VCO=%u, CFGC=0x%04x\n", | |
0bb94e03 VS |
409 | cdclk_config->vco, tmp); |
410 | cdclk_config->cdclk = 222222; | |
49cd97a3 | 411 | break; |
7ff89ca2 VS |
412 | } |
413 | } | |
414 | ||
49cd97a3 | 415 | static void hsw_get_cdclk(struct drm_i915_private *dev_priv, |
0bb94e03 | 416 | struct intel_cdclk_config *cdclk_config) |
7ff89ca2 | 417 | { |
3e9f55df | 418 | u32 lcpll = intel_de_read(dev_priv, LCPLL_CTL); |
cbe974fb | 419 | u32 freq = lcpll & LCPLL_CLK_FREQ_MASK; |
7ff89ca2 VS |
420 | |
421 | if (lcpll & LCPLL_CD_SOURCE_FCLK) | |
0bb94e03 | 422 | cdclk_config->cdclk = 800000; |
3e9f55df | 423 | else if (intel_de_read(dev_priv, FUSE_STRAP) & HSW_CDCLK_LIMIT) |
0bb94e03 | 424 | cdclk_config->cdclk = 450000; |
7ff89ca2 | 425 | else if (freq == LCPLL_CLK_FREQ_450) |
0bb94e03 | 426 | cdclk_config->cdclk = 450000; |
7ff89ca2 | 427 | else if (IS_HSW_ULT(dev_priv)) |
0bb94e03 | 428 | cdclk_config->cdclk = 337500; |
7ff89ca2 | 429 | else |
0bb94e03 | 430 | cdclk_config->cdclk = 540000; |
7ff89ca2 VS |
431 | } |
432 | ||
d305e061 | 433 | static int vlv_calc_cdclk(struct drm_i915_private *dev_priv, int min_cdclk) |
7ff89ca2 VS |
434 | { |
435 | int freq_320 = (dev_priv->hpll_freq << 1) % 320000 != 0 ? | |
436 | 333333 : 320000; | |
7ff89ca2 VS |
437 | |
438 | /* | |
439 | * We seem to get an unstable or solid color picture at 200MHz. | |
440 | * Not sure what's wrong. For now use 200MHz only when all pipes | |
441 | * are off. | |
442 | */ | |
d305e061 | 443 | if (IS_VALLEYVIEW(dev_priv) && min_cdclk > freq_320) |
7ff89ca2 | 444 | return 400000; |
d305e061 | 445 | else if (min_cdclk > 266667) |
7ff89ca2 | 446 | return freq_320; |
d305e061 | 447 | else if (min_cdclk > 0) |
7ff89ca2 VS |
448 | return 266667; |
449 | else | |
450 | return 200000; | |
451 | } | |
452 | ||
999c5766 VS |
453 | static u8 vlv_calc_voltage_level(struct drm_i915_private *dev_priv, int cdclk) |
454 | { | |
455 | if (IS_VALLEYVIEW(dev_priv)) { | |
456 | if (cdclk >= 320000) /* jump to highest voltage for 400MHz too */ | |
457 | return 2; | |
458 | else if (cdclk >= 266667) | |
459 | return 1; | |
460 | else | |
461 | return 0; | |
462 | } else { | |
463 | /* | |
464 | * Specs are full of misinformation, but testing on actual | |
465 | * hardware has shown that we just need to write the desired | |
466 | * CCK divider into the Punit register. | |
467 | */ | |
468 | return DIV_ROUND_CLOSEST(dev_priv->hpll_freq << 1, cdclk) - 1; | |
469 | } | |
470 | } | |
471 | ||
49cd97a3 | 472 | static void vlv_get_cdclk(struct drm_i915_private *dev_priv, |
0bb94e03 | 473 | struct intel_cdclk_config *cdclk_config) |
7ff89ca2 | 474 | { |
999c5766 VS |
475 | u32 val; |
476 | ||
337fa6e0 CW |
477 | vlv_iosf_sb_get(dev_priv, |
478 | BIT(VLV_IOSF_SB_CCK) | BIT(VLV_IOSF_SB_PUNIT)); | |
479 | ||
0bb94e03 VS |
480 | cdclk_config->vco = vlv_get_hpll_vco(dev_priv); |
481 | cdclk_config->cdclk = vlv_get_cck_clock(dev_priv, "cdclk", | |
482 | CCK_DISPLAY_CLOCK_CONTROL, | |
483 | cdclk_config->vco); | |
999c5766 | 484 | |
c11b813f | 485 | val = vlv_punit_read(dev_priv, PUNIT_REG_DSPSSPM); |
337fa6e0 CW |
486 | |
487 | vlv_iosf_sb_put(dev_priv, | |
488 | BIT(VLV_IOSF_SB_CCK) | BIT(VLV_IOSF_SB_PUNIT)); | |
999c5766 VS |
489 | |
490 | if (IS_VALLEYVIEW(dev_priv)) | |
0bb94e03 | 491 | cdclk_config->voltage_level = (val & DSPFREQGUAR_MASK) >> |
999c5766 VS |
492 | DSPFREQGUAR_SHIFT; |
493 | else | |
0bb94e03 | 494 | cdclk_config->voltage_level = (val & DSPFREQGUAR_MASK_CHV) >> |
999c5766 | 495 | DSPFREQGUAR_SHIFT_CHV; |
7ff89ca2 VS |
496 | } |
497 | ||
498 | static void vlv_program_pfi_credits(struct drm_i915_private *dev_priv) | |
499 | { | |
500 | unsigned int credits, default_credits; | |
501 | ||
502 | if (IS_CHERRYVIEW(dev_priv)) | |
503 | default_credits = PFI_CREDIT(12); | |
504 | else | |
505 | default_credits = PFI_CREDIT(8); | |
506 | ||
49cd97a3 | 507 | if (dev_priv->cdclk.hw.cdclk >= dev_priv->czclk_freq) { |
7ff89ca2 VS |
508 | /* CHV suggested value is 31 or 63 */ |
509 | if (IS_CHERRYVIEW(dev_priv)) | |
510 | credits = PFI_CREDIT_63; | |
511 | else | |
512 | credits = PFI_CREDIT(15); | |
513 | } else { | |
514 | credits = default_credits; | |
515 | } | |
516 | ||
517 | /* | |
518 | * WA - write default credits before re-programming | |
519 | * FIXME: should we also set the resend bit here? | |
520 | */ | |
3e9f55df JN |
521 | intel_de_write(dev_priv, GCI_CONTROL, |
522 | VGA_FAST_MODE_DISABLE | default_credits); | |
7ff89ca2 | 523 | |
3e9f55df JN |
524 | intel_de_write(dev_priv, GCI_CONTROL, |
525 | VGA_FAST_MODE_DISABLE | credits | PFI_CREDIT_RESEND); | |
7ff89ca2 VS |
526 | |
527 | /* | |
528 | * FIXME is this guaranteed to clear | |
529 | * immediately or should we poll for it? | |
530 | */ | |
aff35110 PB |
531 | drm_WARN_ON(&dev_priv->drm, |
532 | intel_de_read(dev_priv, GCI_CONTROL) & PFI_CREDIT_RESEND); | |
7ff89ca2 VS |
533 | } |
534 | ||
83c5fda7 | 535 | static void vlv_set_cdclk(struct drm_i915_private *dev_priv, |
0bb94e03 | 536 | const struct intel_cdclk_config *cdclk_config, |
59f9e9ca | 537 | enum pipe pipe) |
7ff89ca2 | 538 | { |
0bb94e03 VS |
539 | int cdclk = cdclk_config->cdclk; |
540 | u32 val, cmd = cdclk_config->voltage_level; | |
0e6e0be4 | 541 | intel_wakeref_t wakeref; |
7ff89ca2 | 542 | |
0c9f353f VS |
543 | switch (cdclk) { |
544 | case 400000: | |
545 | case 333333: | |
546 | case 320000: | |
547 | case 266667: | |
548 | case 200000: | |
549 | break; | |
550 | default: | |
551 | MISSING_CASE(cdclk); | |
552 | return; | |
553 | } | |
554 | ||
886015a0 GKB |
555 | /* There are cases where we can end up here with power domains |
556 | * off and a CDCLK frequency other than the minimum, like when | |
557 | * issuing a modeset without actually changing any display after | |
13ce6092 | 558 | * a system suspend. So grab the display core domain, which covers |
886015a0 GKB |
559 | * the HW blocks needed for the following programming. |
560 | */ | |
13ce6092 | 561 | wakeref = intel_display_power_get(dev_priv, POWER_DOMAIN_DISPLAY_CORE); |
886015a0 | 562 | |
337fa6e0 CW |
563 | vlv_iosf_sb_get(dev_priv, |
564 | BIT(VLV_IOSF_SB_CCK) | | |
565 | BIT(VLV_IOSF_SB_BUNIT) | | |
566 | BIT(VLV_IOSF_SB_PUNIT)); | |
567 | ||
c11b813f | 568 | val = vlv_punit_read(dev_priv, PUNIT_REG_DSPSSPM); |
7ff89ca2 VS |
569 | val &= ~DSPFREQGUAR_MASK; |
570 | val |= (cmd << DSPFREQGUAR_SHIFT); | |
c11b813f VS |
571 | vlv_punit_write(dev_priv, PUNIT_REG_DSPSSPM, val); |
572 | if (wait_for((vlv_punit_read(dev_priv, PUNIT_REG_DSPSSPM) & | |
7ff89ca2 VS |
573 | DSPFREQSTAT_MASK) == (cmd << DSPFREQSTAT_SHIFT), |
574 | 50)) { | |
23194610 WK |
575 | drm_err(&dev_priv->drm, |
576 | "timed out waiting for CDclk change\n"); | |
7ff89ca2 | 577 | } |
7ff89ca2 | 578 | |
7ff89ca2 VS |
579 | if (cdclk == 400000) { |
580 | u32 divider; | |
581 | ||
582 | divider = DIV_ROUND_CLOSEST(dev_priv->hpll_freq << 1, | |
583 | cdclk) - 1; | |
584 | ||
585 | /* adjust cdclk divider */ | |
586 | val = vlv_cck_read(dev_priv, CCK_DISPLAY_CLOCK_CONTROL); | |
587 | val &= ~CCK_FREQUENCY_VALUES; | |
588 | val |= divider; | |
589 | vlv_cck_write(dev_priv, CCK_DISPLAY_CLOCK_CONTROL, val); | |
590 | ||
591 | if (wait_for((vlv_cck_read(dev_priv, CCK_DISPLAY_CLOCK_CONTROL) & | |
592 | CCK_FREQUENCY_STATUS) == (divider << CCK_FREQUENCY_STATUS_SHIFT), | |
593 | 50)) | |
23194610 WK |
594 | drm_err(&dev_priv->drm, |
595 | "timed out waiting for CDclk change\n"); | |
7ff89ca2 VS |
596 | } |
597 | ||
598 | /* adjust self-refresh exit latency value */ | |
599 | val = vlv_bunit_read(dev_priv, BUNIT_REG_BISOC); | |
600 | val &= ~0x7f; | |
601 | ||
602 | /* | |
603 | * For high bandwidth configs, we set a higher latency in the bunit | |
604 | * so that the core display fetch happens in time to avoid underruns. | |
605 | */ | |
606 | if (cdclk == 400000) | |
607 | val |= 4500 / 250; /* 4.5 usec */ | |
608 | else | |
609 | val |= 3000 / 250; /* 3.0 usec */ | |
610 | vlv_bunit_write(dev_priv, BUNIT_REG_BISOC, val); | |
611 | ||
221c7862 | 612 | vlv_iosf_sb_put(dev_priv, |
337fa6e0 CW |
613 | BIT(VLV_IOSF_SB_CCK) | |
614 | BIT(VLV_IOSF_SB_BUNIT) | | |
615 | BIT(VLV_IOSF_SB_PUNIT)); | |
7ff89ca2 VS |
616 | |
617 | intel_update_cdclk(dev_priv); | |
1a5301a5 VS |
618 | |
619 | vlv_program_pfi_credits(dev_priv); | |
886015a0 | 620 | |
13ce6092 | 621 | intel_display_power_put(dev_priv, POWER_DOMAIN_DISPLAY_CORE, wakeref); |
7ff89ca2 VS |
622 | } |
623 | ||
83c5fda7 | 624 | static void chv_set_cdclk(struct drm_i915_private *dev_priv, |
0bb94e03 | 625 | const struct intel_cdclk_config *cdclk_config, |
59f9e9ca | 626 | enum pipe pipe) |
7ff89ca2 | 627 | { |
0bb94e03 VS |
628 | int cdclk = cdclk_config->cdclk; |
629 | u32 val, cmd = cdclk_config->voltage_level; | |
0e6e0be4 | 630 | intel_wakeref_t wakeref; |
7ff89ca2 | 631 | |
7ff89ca2 VS |
632 | switch (cdclk) { |
633 | case 333333: | |
634 | case 320000: | |
635 | case 266667: | |
636 | case 200000: | |
637 | break; | |
638 | default: | |
639 | MISSING_CASE(cdclk); | |
640 | return; | |
641 | } | |
642 | ||
886015a0 GKB |
643 | /* There are cases where we can end up here with power domains |
644 | * off and a CDCLK frequency other than the minimum, like when | |
645 | * issuing a modeset without actually changing any display after | |
13ce6092 | 646 | * a system suspend. So grab the display core domain, which covers |
886015a0 GKB |
647 | * the HW blocks needed for the following programming. |
648 | */ | |
13ce6092 | 649 | wakeref = intel_display_power_get(dev_priv, POWER_DOMAIN_DISPLAY_CORE); |
886015a0 | 650 | |
337fa6e0 | 651 | vlv_punit_get(dev_priv); |
c11b813f | 652 | val = vlv_punit_read(dev_priv, PUNIT_REG_DSPSSPM); |
7ff89ca2 VS |
653 | val &= ~DSPFREQGUAR_MASK_CHV; |
654 | val |= (cmd << DSPFREQGUAR_SHIFT_CHV); | |
c11b813f VS |
655 | vlv_punit_write(dev_priv, PUNIT_REG_DSPSSPM, val); |
656 | if (wait_for((vlv_punit_read(dev_priv, PUNIT_REG_DSPSSPM) & | |
7ff89ca2 VS |
657 | DSPFREQSTAT_MASK_CHV) == (cmd << DSPFREQSTAT_SHIFT_CHV), |
658 | 50)) { | |
23194610 WK |
659 | drm_err(&dev_priv->drm, |
660 | "timed out waiting for CDclk change\n"); | |
7ff89ca2 | 661 | } |
337fa6e0 CW |
662 | |
663 | vlv_punit_put(dev_priv); | |
7ff89ca2 VS |
664 | |
665 | intel_update_cdclk(dev_priv); | |
1a5301a5 VS |
666 | |
667 | vlv_program_pfi_credits(dev_priv); | |
886015a0 | 668 | |
13ce6092 | 669 | intel_display_power_put(dev_priv, POWER_DOMAIN_DISPLAY_CORE, wakeref); |
7ff89ca2 VS |
670 | } |
671 | ||
d305e061 | 672 | static int bdw_calc_cdclk(int min_cdclk) |
7ff89ca2 | 673 | { |
d305e061 | 674 | if (min_cdclk > 540000) |
7ff89ca2 | 675 | return 675000; |
d305e061 | 676 | else if (min_cdclk > 450000) |
7ff89ca2 | 677 | return 540000; |
d305e061 | 678 | else if (min_cdclk > 337500) |
7ff89ca2 VS |
679 | return 450000; |
680 | else | |
681 | return 337500; | |
682 | } | |
683 | ||
d7ffaeef VS |
684 | static u8 bdw_calc_voltage_level(int cdclk) |
685 | { | |
686 | switch (cdclk) { | |
687 | default: | |
688 | case 337500: | |
689 | return 2; | |
690 | case 450000: | |
691 | return 0; | |
692 | case 540000: | |
693 | return 1; | |
694 | case 675000: | |
695 | return 3; | |
696 | } | |
697 | } | |
698 | ||
49cd97a3 | 699 | static void bdw_get_cdclk(struct drm_i915_private *dev_priv, |
0bb94e03 | 700 | struct intel_cdclk_config *cdclk_config) |
7ff89ca2 | 701 | { |
3e9f55df | 702 | u32 lcpll = intel_de_read(dev_priv, LCPLL_CTL); |
cbe974fb | 703 | u32 freq = lcpll & LCPLL_CLK_FREQ_MASK; |
7ff89ca2 VS |
704 | |
705 | if (lcpll & LCPLL_CD_SOURCE_FCLK) | |
0bb94e03 | 706 | cdclk_config->cdclk = 800000; |
3e9f55df | 707 | else if (intel_de_read(dev_priv, FUSE_STRAP) & HSW_CDCLK_LIMIT) |
0bb94e03 | 708 | cdclk_config->cdclk = 450000; |
7ff89ca2 | 709 | else if (freq == LCPLL_CLK_FREQ_450) |
0bb94e03 | 710 | cdclk_config->cdclk = 450000; |
7ff89ca2 | 711 | else if (freq == LCPLL_CLK_FREQ_54O_BDW) |
0bb94e03 | 712 | cdclk_config->cdclk = 540000; |
7ff89ca2 | 713 | else if (freq == LCPLL_CLK_FREQ_337_5_BDW) |
0bb94e03 | 714 | cdclk_config->cdclk = 337500; |
7ff89ca2 | 715 | else |
0bb94e03 | 716 | cdclk_config->cdclk = 675000; |
d7ffaeef VS |
717 | |
718 | /* | |
719 | * Can't read this out :( Let's assume it's | |
720 | * at least what the CDCLK frequency requires. | |
721 | */ | |
0bb94e03 VS |
722 | cdclk_config->voltage_level = |
723 | bdw_calc_voltage_level(cdclk_config->cdclk); | |
7ff89ca2 VS |
724 | } |
725 | ||
83c5fda7 | 726 | static void bdw_set_cdclk(struct drm_i915_private *dev_priv, |
0bb94e03 | 727 | const struct intel_cdclk_config *cdclk_config, |
59f9e9ca | 728 | enum pipe pipe) |
7ff89ca2 | 729 | { |
0bb94e03 | 730 | int cdclk = cdclk_config->cdclk; |
cbe974fb | 731 | u32 val; |
7ff89ca2 VS |
732 | int ret; |
733 | ||
aff35110 PB |
734 | if (drm_WARN(&dev_priv->drm, |
735 | (intel_de_read(dev_priv, LCPLL_CTL) & | |
736 | (LCPLL_PLL_DISABLE | LCPLL_PLL_LOCK | | |
737 | LCPLL_CD_CLOCK_DISABLE | LCPLL_ROOT_CD_CLOCK_DISABLE | | |
738 | LCPLL_CD2X_CLOCK_DISABLE | LCPLL_POWER_DOWN_ALLOW | | |
739 | LCPLL_CD_SOURCE_FCLK)) != LCPLL_PLL_LOCK, | |
740 | "trying to change cdclk frequency with cdclk not enabled\n")) | |
7ff89ca2 VS |
741 | return; |
742 | ||
7ff89ca2 VS |
743 | ret = sandybridge_pcode_write(dev_priv, |
744 | BDW_PCODE_DISPLAY_FREQ_CHANGE_REQ, 0x0); | |
7ff89ca2 | 745 | if (ret) { |
23194610 WK |
746 | drm_err(&dev_priv->drm, |
747 | "failed to inform pcode about cdclk change\n"); | |
7ff89ca2 VS |
748 | return; |
749 | } | |
750 | ||
3e9f55df | 751 | val = intel_de_read(dev_priv, LCPLL_CTL); |
7ff89ca2 | 752 | val |= LCPLL_CD_SOURCE_FCLK; |
3e9f55df | 753 | intel_de_write(dev_priv, LCPLL_CTL, val); |
7ff89ca2 | 754 | |
3164888a ML |
755 | /* |
756 | * According to the spec, it should be enough to poll for this 1 us. | |
757 | * However, extensive testing shows that this can take longer. | |
758 | */ | |
3e9f55df | 759 | if (wait_for_us(intel_de_read(dev_priv, LCPLL_CTL) & |
3164888a | 760 | LCPLL_CD_SOURCE_FCLK_DONE, 100)) |
23194610 | 761 | drm_err(&dev_priv->drm, "Switching to FCLK failed\n"); |
7ff89ca2 | 762 | |
3e9f55df | 763 | val = intel_de_read(dev_priv, LCPLL_CTL); |
7ff89ca2 VS |
764 | val &= ~LCPLL_CLK_FREQ_MASK; |
765 | ||
766 | switch (cdclk) { | |
2b58417f VS |
767 | default: |
768 | MISSING_CASE(cdclk); | |
769 | /* fall through */ | |
770 | case 337500: | |
771 | val |= LCPLL_CLK_FREQ_337_5_BDW; | |
2b58417f | 772 | break; |
7ff89ca2 VS |
773 | case 450000: |
774 | val |= LCPLL_CLK_FREQ_450; | |
7ff89ca2 VS |
775 | break; |
776 | case 540000: | |
777 | val |= LCPLL_CLK_FREQ_54O_BDW; | |
7ff89ca2 | 778 | break; |
7ff89ca2 VS |
779 | case 675000: |
780 | val |= LCPLL_CLK_FREQ_675_BDW; | |
7ff89ca2 | 781 | break; |
7ff89ca2 VS |
782 | } |
783 | ||
3e9f55df | 784 | intel_de_write(dev_priv, LCPLL_CTL, val); |
7ff89ca2 | 785 | |
3e9f55df | 786 | val = intel_de_read(dev_priv, LCPLL_CTL); |
7ff89ca2 | 787 | val &= ~LCPLL_CD_SOURCE_FCLK; |
3e9f55df | 788 | intel_de_write(dev_priv, LCPLL_CTL, val); |
7ff89ca2 | 789 | |
3e9f55df JN |
790 | if (wait_for_us((intel_de_read(dev_priv, LCPLL_CTL) & |
791 | LCPLL_CD_SOURCE_FCLK_DONE) == 0, 1)) | |
23194610 | 792 | drm_err(&dev_priv->drm, "Switching back to LCPLL failed\n"); |
7ff89ca2 | 793 | |
d7ffaeef | 794 | sandybridge_pcode_write(dev_priv, HSW_PCODE_DE_WRITE_FREQ_REQ, |
0bb94e03 | 795 | cdclk_config->voltage_level); |
7ff89ca2 | 796 | |
3e9f55df JN |
797 | intel_de_write(dev_priv, CDCLK_FREQ, |
798 | DIV_ROUND_CLOSEST(cdclk, 1000) - 1); | |
7ff89ca2 VS |
799 | |
800 | intel_update_cdclk(dev_priv); | |
7ff89ca2 VS |
801 | } |
802 | ||
d305e061 | 803 | static int skl_calc_cdclk(int min_cdclk, int vco) |
7ff89ca2 VS |
804 | { |
805 | if (vco == 8640000) { | |
d305e061 | 806 | if (min_cdclk > 540000) |
7ff89ca2 | 807 | return 617143; |
d305e061 | 808 | else if (min_cdclk > 432000) |
7ff89ca2 | 809 | return 540000; |
d305e061 | 810 | else if (min_cdclk > 308571) |
7ff89ca2 VS |
811 | return 432000; |
812 | else | |
813 | return 308571; | |
814 | } else { | |
d305e061 | 815 | if (min_cdclk > 540000) |
7ff89ca2 | 816 | return 675000; |
d305e061 | 817 | else if (min_cdclk > 450000) |
7ff89ca2 | 818 | return 540000; |
d305e061 | 819 | else if (min_cdclk > 337500) |
7ff89ca2 VS |
820 | return 450000; |
821 | else | |
822 | return 337500; | |
823 | } | |
824 | } | |
825 | ||
2aa97491 VS |
826 | static u8 skl_calc_voltage_level(int cdclk) |
827 | { | |
522d47cf | 828 | if (cdclk > 540000) |
2aa97491 | 829 | return 3; |
522d47cf LDM |
830 | else if (cdclk > 450000) |
831 | return 2; | |
832 | else if (cdclk > 337500) | |
833 | return 1; | |
834 | else | |
835 | return 0; | |
2aa97491 VS |
836 | } |
837 | ||
49cd97a3 | 838 | static void skl_dpll0_update(struct drm_i915_private *dev_priv, |
0bb94e03 | 839 | struct intel_cdclk_config *cdclk_config) |
7ff89ca2 VS |
840 | { |
841 | u32 val; | |
842 | ||
0bb94e03 VS |
843 | cdclk_config->ref = 24000; |
844 | cdclk_config->vco = 0; | |
7ff89ca2 | 845 | |
3e9f55df | 846 | val = intel_de_read(dev_priv, LCPLL1_CTL); |
7ff89ca2 VS |
847 | if ((val & LCPLL_PLL_ENABLE) == 0) |
848 | return; | |
849 | ||
aff35110 | 850 | if (drm_WARN_ON(&dev_priv->drm, (val & LCPLL_PLL_LOCK) == 0)) |
7ff89ca2 VS |
851 | return; |
852 | ||
3e9f55df | 853 | val = intel_de_read(dev_priv, DPLL_CTRL1); |
7ff89ca2 | 854 | |
aff35110 PB |
855 | if (drm_WARN_ON(&dev_priv->drm, |
856 | (val & (DPLL_CTRL1_HDMI_MODE(SKL_DPLL0) | | |
857 | DPLL_CTRL1_SSC(SKL_DPLL0) | | |
858 | DPLL_CTRL1_OVERRIDE(SKL_DPLL0))) != | |
859 | DPLL_CTRL1_OVERRIDE(SKL_DPLL0))) | |
7ff89ca2 VS |
860 | return; |
861 | ||
862 | switch (val & DPLL_CTRL1_LINK_RATE_MASK(SKL_DPLL0)) { | |
863 | case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_810, SKL_DPLL0): | |
864 | case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1350, SKL_DPLL0): | |
865 | case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1620, SKL_DPLL0): | |
866 | case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_2700, SKL_DPLL0): | |
0bb94e03 | 867 | cdclk_config->vco = 8100000; |
7ff89ca2 VS |
868 | break; |
869 | case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1080, SKL_DPLL0): | |
870 | case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_2160, SKL_DPLL0): | |
0bb94e03 | 871 | cdclk_config->vco = 8640000; |
7ff89ca2 VS |
872 | break; |
873 | default: | |
874 | MISSING_CASE(val & DPLL_CTRL1_LINK_RATE_MASK(SKL_DPLL0)); | |
875 | break; | |
876 | } | |
877 | } | |
878 | ||
49cd97a3 | 879 | static void skl_get_cdclk(struct drm_i915_private *dev_priv, |
0bb94e03 | 880 | struct intel_cdclk_config *cdclk_config) |
7ff89ca2 VS |
881 | { |
882 | u32 cdctl; | |
883 | ||
0bb94e03 | 884 | skl_dpll0_update(dev_priv, cdclk_config); |
7ff89ca2 | 885 | |
0bb94e03 | 886 | cdclk_config->cdclk = cdclk_config->bypass = cdclk_config->ref; |
49cd97a3 | 887 | |
0bb94e03 | 888 | if (cdclk_config->vco == 0) |
2aa97491 | 889 | goto out; |
7ff89ca2 | 890 | |
3e9f55df | 891 | cdctl = intel_de_read(dev_priv, CDCLK_CTL); |
7ff89ca2 | 892 | |
0bb94e03 | 893 | if (cdclk_config->vco == 8640000) { |
7ff89ca2 VS |
894 | switch (cdctl & CDCLK_FREQ_SEL_MASK) { |
895 | case CDCLK_FREQ_450_432: | |
0bb94e03 | 896 | cdclk_config->cdclk = 432000; |
49cd97a3 | 897 | break; |
7ff89ca2 | 898 | case CDCLK_FREQ_337_308: |
0bb94e03 | 899 | cdclk_config->cdclk = 308571; |
49cd97a3 | 900 | break; |
7ff89ca2 | 901 | case CDCLK_FREQ_540: |
0bb94e03 | 902 | cdclk_config->cdclk = 540000; |
49cd97a3 | 903 | break; |
7ff89ca2 | 904 | case CDCLK_FREQ_675_617: |
0bb94e03 | 905 | cdclk_config->cdclk = 617143; |
49cd97a3 | 906 | break; |
7ff89ca2 VS |
907 | default: |
908 | MISSING_CASE(cdctl & CDCLK_FREQ_SEL_MASK); | |
49cd97a3 | 909 | break; |
7ff89ca2 VS |
910 | } |
911 | } else { | |
912 | switch (cdctl & CDCLK_FREQ_SEL_MASK) { | |
913 | case CDCLK_FREQ_450_432: | |
0bb94e03 | 914 | cdclk_config->cdclk = 450000; |
49cd97a3 | 915 | break; |
7ff89ca2 | 916 | case CDCLK_FREQ_337_308: |
0bb94e03 | 917 | cdclk_config->cdclk = 337500; |
49cd97a3 | 918 | break; |
7ff89ca2 | 919 | case CDCLK_FREQ_540: |
0bb94e03 | 920 | cdclk_config->cdclk = 540000; |
49cd97a3 | 921 | break; |
7ff89ca2 | 922 | case CDCLK_FREQ_675_617: |
0bb94e03 | 923 | cdclk_config->cdclk = 675000; |
49cd97a3 | 924 | break; |
7ff89ca2 VS |
925 | default: |
926 | MISSING_CASE(cdctl & CDCLK_FREQ_SEL_MASK); | |
49cd97a3 | 927 | break; |
7ff89ca2 VS |
928 | } |
929 | } | |
2aa97491 VS |
930 | |
931 | out: | |
932 | /* | |
933 | * Can't read this out :( Let's assume it's | |
934 | * at least what the CDCLK frequency requires. | |
935 | */ | |
0bb94e03 VS |
936 | cdclk_config->voltage_level = |
937 | skl_calc_voltage_level(cdclk_config->cdclk); | |
7ff89ca2 VS |
938 | } |
939 | ||
940 | /* convert from kHz to .1 fixpoint MHz with -1MHz offset */ | |
941 | static int skl_cdclk_decimal(int cdclk) | |
942 | { | |
943 | return DIV_ROUND_CLOSEST(cdclk - 1000, 500); | |
944 | } | |
945 | ||
946 | static void skl_set_preferred_cdclk_vco(struct drm_i915_private *dev_priv, | |
947 | int vco) | |
948 | { | |
949 | bool changed = dev_priv->skl_preferred_vco_freq != vco; | |
950 | ||
951 | dev_priv->skl_preferred_vco_freq = vco; | |
952 | ||
953 | if (changed) | |
954 | intel_update_max_cdclk(dev_priv); | |
955 | } | |
956 | ||
957 | static void skl_dpll0_enable(struct drm_i915_private *dev_priv, int vco) | |
958 | { | |
7ff89ca2 VS |
959 | u32 val; |
960 | ||
aff35110 | 961 | drm_WARN_ON(&dev_priv->drm, vco != 8100000 && vco != 8640000); |
7ff89ca2 | 962 | |
7ff89ca2 VS |
963 | /* |
964 | * We always enable DPLL0 with the lowest link rate possible, but still | |
965 | * taking into account the VCO required to operate the eDP panel at the | |
966 | * desired frequency. The usual DP link rates operate with a VCO of | |
967 | * 8100 while the eDP 1.4 alternate link rates need a VCO of 8640. | |
968 | * The modeset code is responsible for the selection of the exact link | |
969 | * rate later on, with the constraint of choosing a frequency that | |
970 | * works with vco. | |
971 | */ | |
3e9f55df | 972 | val = intel_de_read(dev_priv, DPLL_CTRL1); |
7ff89ca2 VS |
973 | |
974 | val &= ~(DPLL_CTRL1_HDMI_MODE(SKL_DPLL0) | DPLL_CTRL1_SSC(SKL_DPLL0) | | |
975 | DPLL_CTRL1_LINK_RATE_MASK(SKL_DPLL0)); | |
976 | val |= DPLL_CTRL1_OVERRIDE(SKL_DPLL0); | |
977 | if (vco == 8640000) | |
978 | val |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1080, | |
979 | SKL_DPLL0); | |
980 | else | |
981 | val |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_810, | |
982 | SKL_DPLL0); | |
983 | ||
3e9f55df JN |
984 | intel_de_write(dev_priv, DPLL_CTRL1, val); |
985 | intel_de_posting_read(dev_priv, DPLL_CTRL1); | |
7ff89ca2 | 986 | |
3e9f55df JN |
987 | intel_de_write(dev_priv, LCPLL1_CTL, |
988 | intel_de_read(dev_priv, LCPLL1_CTL) | LCPLL_PLL_ENABLE); | |
7ff89ca2 | 989 | |
4cb3b44d | 990 | if (intel_de_wait_for_set(dev_priv, LCPLL1_CTL, LCPLL_PLL_LOCK, 5)) |
23194610 | 991 | drm_err(&dev_priv->drm, "DPLL0 not locked\n"); |
7ff89ca2 | 992 | |
49cd97a3 | 993 | dev_priv->cdclk.hw.vco = vco; |
7ff89ca2 VS |
994 | |
995 | /* We'll want to keep using the current vco from now on. */ | |
996 | skl_set_preferred_cdclk_vco(dev_priv, vco); | |
997 | } | |
998 | ||
999 | static void skl_dpll0_disable(struct drm_i915_private *dev_priv) | |
1000 | { | |
3e9f55df JN |
1001 | intel_de_write(dev_priv, LCPLL1_CTL, |
1002 | intel_de_read(dev_priv, LCPLL1_CTL) & ~LCPLL_PLL_ENABLE); | |
4cb3b44d | 1003 | if (intel_de_wait_for_clear(dev_priv, LCPLL1_CTL, LCPLL_PLL_LOCK, 1)) |
23194610 | 1004 | drm_err(&dev_priv->drm, "Couldn't disable DPLL0\n"); |
7ff89ca2 | 1005 | |
49cd97a3 | 1006 | dev_priv->cdclk.hw.vco = 0; |
7ff89ca2 VS |
1007 | } |
1008 | ||
1009 | static void skl_set_cdclk(struct drm_i915_private *dev_priv, | |
0bb94e03 | 1010 | const struct intel_cdclk_config *cdclk_config, |
59f9e9ca | 1011 | enum pipe pipe) |
7ff89ca2 | 1012 | { |
0bb94e03 VS |
1013 | int cdclk = cdclk_config->cdclk; |
1014 | int vco = cdclk_config->vco; | |
53421c2f | 1015 | u32 freq_select, cdclk_ctl; |
7ff89ca2 VS |
1016 | int ret; |
1017 | ||
602a9de5 ID |
1018 | /* |
1019 | * Based on WA#1183 CDCLK rates 308 and 617MHz CDCLK rates are | |
1020 | * unsupported on SKL. In theory this should never happen since only | |
1021 | * the eDP1.4 2.16 and 4.32Gbps rates require it, but eDP1.4 is not | |
1022 | * supported on SKL either, see the above WA. WARN whenever trying to | |
1023 | * use the corresponding VCO freq as that always leads to using the | |
1024 | * minimum 308MHz CDCLK. | |
1025 | */ | |
aff35110 PB |
1026 | drm_WARN_ON_ONCE(&dev_priv->drm, |
1027 | IS_SKYLAKE(dev_priv) && vco == 8640000); | |
602a9de5 | 1028 | |
7ff89ca2 VS |
1029 | ret = skl_pcode_request(dev_priv, SKL_PCODE_CDCLK_CONTROL, |
1030 | SKL_CDCLK_PREPARE_FOR_CHANGE, | |
1031 | SKL_CDCLK_READY_FOR_CHANGE, | |
1032 | SKL_CDCLK_READY_FOR_CHANGE, 3); | |
7ff89ca2 | 1033 | if (ret) { |
23194610 WK |
1034 | drm_err(&dev_priv->drm, |
1035 | "Failed to inform PCU about cdclk change (%d)\n", ret); | |
7ff89ca2 VS |
1036 | return; |
1037 | } | |
1038 | ||
53421c2f | 1039 | /* Choose frequency for this cdclk */ |
7ff89ca2 | 1040 | switch (cdclk) { |
2b58417f | 1041 | default: |
aff35110 PB |
1042 | drm_WARN_ON(&dev_priv->drm, |
1043 | cdclk != dev_priv->cdclk.hw.bypass); | |
1044 | drm_WARN_ON(&dev_priv->drm, vco != 0); | |
2b58417f VS |
1045 | /* fall through */ |
1046 | case 308571: | |
1047 | case 337500: | |
1048 | freq_select = CDCLK_FREQ_337_308; | |
2b58417f | 1049 | break; |
7ff89ca2 VS |
1050 | case 450000: |
1051 | case 432000: | |
1052 | freq_select = CDCLK_FREQ_450_432; | |
7ff89ca2 VS |
1053 | break; |
1054 | case 540000: | |
1055 | freq_select = CDCLK_FREQ_540; | |
7ff89ca2 | 1056 | break; |
7ff89ca2 VS |
1057 | case 617143: |
1058 | case 675000: | |
1059 | freq_select = CDCLK_FREQ_675_617; | |
7ff89ca2 VS |
1060 | break; |
1061 | } | |
1062 | ||
49cd97a3 VS |
1063 | if (dev_priv->cdclk.hw.vco != 0 && |
1064 | dev_priv->cdclk.hw.vco != vco) | |
7ff89ca2 VS |
1065 | skl_dpll0_disable(dev_priv); |
1066 | ||
3e9f55df | 1067 | cdclk_ctl = intel_de_read(dev_priv, CDCLK_CTL); |
53421c2f LDM |
1068 | |
1069 | if (dev_priv->cdclk.hw.vco != vco) { | |
1070 | /* Wa Display #1183: skl,kbl,cfl */ | |
1071 | cdclk_ctl &= ~(CDCLK_FREQ_SEL_MASK | CDCLK_FREQ_DECIMAL_MASK); | |
1072 | cdclk_ctl |= freq_select | skl_cdclk_decimal(cdclk); | |
3e9f55df | 1073 | intel_de_write(dev_priv, CDCLK_CTL, cdclk_ctl); |
53421c2f LDM |
1074 | } |
1075 | ||
1076 | /* Wa Display #1183: skl,kbl,cfl */ | |
1077 | cdclk_ctl |= CDCLK_DIVMUX_CD_OVERRIDE; | |
3e9f55df JN |
1078 | intel_de_write(dev_priv, CDCLK_CTL, cdclk_ctl); |
1079 | intel_de_posting_read(dev_priv, CDCLK_CTL); | |
53421c2f | 1080 | |
49cd97a3 | 1081 | if (dev_priv->cdclk.hw.vco != vco) |
7ff89ca2 VS |
1082 | skl_dpll0_enable(dev_priv, vco); |
1083 | ||
53421c2f LDM |
1084 | /* Wa Display #1183: skl,kbl,cfl */ |
1085 | cdclk_ctl &= ~(CDCLK_FREQ_SEL_MASK | CDCLK_FREQ_DECIMAL_MASK); | |
3e9f55df | 1086 | intel_de_write(dev_priv, CDCLK_CTL, cdclk_ctl); |
53421c2f LDM |
1087 | |
1088 | cdclk_ctl |= freq_select | skl_cdclk_decimal(cdclk); | |
3e9f55df | 1089 | intel_de_write(dev_priv, CDCLK_CTL, cdclk_ctl); |
53421c2f LDM |
1090 | |
1091 | /* Wa Display #1183: skl,kbl,cfl */ | |
1092 | cdclk_ctl &= ~CDCLK_DIVMUX_CD_OVERRIDE; | |
3e9f55df JN |
1093 | intel_de_write(dev_priv, CDCLK_CTL, cdclk_ctl); |
1094 | intel_de_posting_read(dev_priv, CDCLK_CTL); | |
7ff89ca2 VS |
1095 | |
1096 | /* inform PCU of the change */ | |
2aa97491 | 1097 | sandybridge_pcode_write(dev_priv, SKL_PCODE_CDCLK_CONTROL, |
0bb94e03 | 1098 | cdclk_config->voltage_level); |
7ff89ca2 VS |
1099 | |
1100 | intel_update_cdclk(dev_priv); | |
1101 | } | |
1102 | ||
1103 | static void skl_sanitize_cdclk(struct drm_i915_private *dev_priv) | |
1104 | { | |
cbe974fb | 1105 | u32 cdctl, expected; |
7ff89ca2 VS |
1106 | |
1107 | /* | |
1108 | * check if the pre-os initialized the display | |
1109 | * There is SWF18 scratchpad register defined which is set by the | |
1110 | * pre-os which can be used by the OS drivers to check the status | |
1111 | */ | |
3e9f55df | 1112 | if ((intel_de_read(dev_priv, SWF_ILK(0x18)) & 0x00FFFFFF) == 0) |
7ff89ca2 VS |
1113 | goto sanitize; |
1114 | ||
1115 | intel_update_cdclk(dev_priv); | |
0bb94e03 | 1116 | intel_dump_cdclk_config(&dev_priv->cdclk.hw, "Current CDCLK"); |
cfddadc9 | 1117 | |
7ff89ca2 | 1118 | /* Is PLL enabled and locked ? */ |
49cd97a3 | 1119 | if (dev_priv->cdclk.hw.vco == 0 || |
b6c51c3e | 1120 | dev_priv->cdclk.hw.cdclk == dev_priv->cdclk.hw.bypass) |
7ff89ca2 VS |
1121 | goto sanitize; |
1122 | ||
1123 | /* DPLL okay; verify the cdclock | |
1124 | * | |
1125 | * Noticed in some instances that the freq selection is correct but | |
1126 | * decimal part is programmed wrong from BIOS where pre-os does not | |
1127 | * enable display. Verify the same as well. | |
1128 | */ | |
3e9f55df | 1129 | cdctl = intel_de_read(dev_priv, CDCLK_CTL); |
7ff89ca2 | 1130 | expected = (cdctl & CDCLK_FREQ_SEL_MASK) | |
49cd97a3 | 1131 | skl_cdclk_decimal(dev_priv->cdclk.hw.cdclk); |
7ff89ca2 VS |
1132 | if (cdctl == expected) |
1133 | /* All well; nothing to sanitize */ | |
1134 | return; | |
1135 | ||
1136 | sanitize: | |
23194610 | 1137 | drm_dbg_kms(&dev_priv->drm, "Sanitizing cdclk programmed by pre-os\n"); |
7ff89ca2 VS |
1138 | |
1139 | /* force cdclk programming */ | |
49cd97a3 | 1140 | dev_priv->cdclk.hw.cdclk = 0; |
7ff89ca2 | 1141 | /* force full PLL disable + enable */ |
49cd97a3 | 1142 | dev_priv->cdclk.hw.vco = -1; |
7ff89ca2 VS |
1143 | } |
1144 | ||
ed645eee | 1145 | static void skl_cdclk_init_hw(struct drm_i915_private *dev_priv) |
7ff89ca2 | 1146 | { |
0bb94e03 | 1147 | struct intel_cdclk_config cdclk_config; |
7ff89ca2 VS |
1148 | |
1149 | skl_sanitize_cdclk(dev_priv); | |
1150 | ||
49cd97a3 VS |
1151 | if (dev_priv->cdclk.hw.cdclk != 0 && |
1152 | dev_priv->cdclk.hw.vco != 0) { | |
7ff89ca2 VS |
1153 | /* |
1154 | * Use the current vco as our initial | |
1155 | * guess as to what the preferred vco is. | |
1156 | */ | |
1157 | if (dev_priv->skl_preferred_vco_freq == 0) | |
1158 | skl_set_preferred_cdclk_vco(dev_priv, | |
49cd97a3 | 1159 | dev_priv->cdclk.hw.vco); |
7ff89ca2 VS |
1160 | return; |
1161 | } | |
1162 | ||
0bb94e03 | 1163 | cdclk_config = dev_priv->cdclk.hw; |
83c5fda7 | 1164 | |
0bb94e03 VS |
1165 | cdclk_config.vco = dev_priv->skl_preferred_vco_freq; |
1166 | if (cdclk_config.vco == 0) | |
1167 | cdclk_config.vco = 8100000; | |
1168 | cdclk_config.cdclk = skl_calc_cdclk(0, cdclk_config.vco); | |
1169 | cdclk_config.voltage_level = skl_calc_voltage_level(cdclk_config.cdclk); | |
7ff89ca2 | 1170 | |
0bb94e03 | 1171 | skl_set_cdclk(dev_priv, &cdclk_config, INVALID_PIPE); |
7ff89ca2 VS |
1172 | } |
1173 | ||
ed645eee | 1174 | static void skl_cdclk_uninit_hw(struct drm_i915_private *dev_priv) |
7ff89ca2 | 1175 | { |
0bb94e03 | 1176 | struct intel_cdclk_config cdclk_config = dev_priv->cdclk.hw; |
83c5fda7 | 1177 | |
0bb94e03 VS |
1178 | cdclk_config.cdclk = cdclk_config.bypass; |
1179 | cdclk_config.vco = 0; | |
1180 | cdclk_config.voltage_level = skl_calc_voltage_level(cdclk_config.cdclk); | |
83c5fda7 | 1181 | |
0bb94e03 | 1182 | skl_set_cdclk(dev_priv, &cdclk_config, INVALID_PIPE); |
7ff89ca2 VS |
1183 | } |
1184 | ||
736da811 MR |
1185 | static const struct intel_cdclk_vals bxt_cdclk_table[] = { |
1186 | { .refclk = 19200, .cdclk = 144000, .divider = 8, .ratio = 60 }, | |
1187 | { .refclk = 19200, .cdclk = 288000, .divider = 4, .ratio = 60 }, | |
1188 | { .refclk = 19200, .cdclk = 384000, .divider = 3, .ratio = 60 }, | |
1189 | { .refclk = 19200, .cdclk = 576000, .divider = 2, .ratio = 60 }, | |
1190 | { .refclk = 19200, .cdclk = 624000, .divider = 2, .ratio = 65 }, | |
1191 | {} | |
1192 | }; | |
1193 | ||
1194 | static const struct intel_cdclk_vals glk_cdclk_table[] = { | |
1195 | { .refclk = 19200, .cdclk = 79200, .divider = 8, .ratio = 33 }, | |
1196 | { .refclk = 19200, .cdclk = 158400, .divider = 4, .ratio = 33 }, | |
1197 | { .refclk = 19200, .cdclk = 316800, .divider = 2, .ratio = 33 }, | |
1198 | {} | |
1199 | }; | |
1200 | ||
1201 | static const struct intel_cdclk_vals cnl_cdclk_table[] = { | |
1202 | { .refclk = 19200, .cdclk = 168000, .divider = 4, .ratio = 35 }, | |
1203 | { .refclk = 19200, .cdclk = 336000, .divider = 2, .ratio = 35 }, | |
1204 | { .refclk = 19200, .cdclk = 528000, .divider = 2, .ratio = 55 }, | |
1205 | ||
1206 | { .refclk = 24000, .cdclk = 168000, .divider = 4, .ratio = 28 }, | |
1207 | { .refclk = 24000, .cdclk = 336000, .divider = 2, .ratio = 28 }, | |
1208 | { .refclk = 24000, .cdclk = 528000, .divider = 2, .ratio = 44 }, | |
1209 | {} | |
1210 | }; | |
1211 | ||
1212 | static const struct intel_cdclk_vals icl_cdclk_table[] = { | |
1213 | { .refclk = 19200, .cdclk = 172800, .divider = 2, .ratio = 18 }, | |
1214 | { .refclk = 19200, .cdclk = 192000, .divider = 2, .ratio = 20 }, | |
1215 | { .refclk = 19200, .cdclk = 307200, .divider = 2, .ratio = 32 }, | |
1216 | { .refclk = 19200, .cdclk = 326400, .divider = 4, .ratio = 68 }, | |
1217 | { .refclk = 19200, .cdclk = 556800, .divider = 2, .ratio = 58 }, | |
1218 | { .refclk = 19200, .cdclk = 652800, .divider = 2, .ratio = 68 }, | |
1219 | ||
1220 | { .refclk = 24000, .cdclk = 180000, .divider = 2, .ratio = 15 }, | |
1221 | { .refclk = 24000, .cdclk = 192000, .divider = 2, .ratio = 16 }, | |
1222 | { .refclk = 24000, .cdclk = 312000, .divider = 2, .ratio = 26 }, | |
1223 | { .refclk = 24000, .cdclk = 324000, .divider = 4, .ratio = 54 }, | |
1224 | { .refclk = 24000, .cdclk = 552000, .divider = 2, .ratio = 46 }, | |
1225 | { .refclk = 24000, .cdclk = 648000, .divider = 2, .ratio = 54 }, | |
1226 | ||
1227 | { .refclk = 38400, .cdclk = 172800, .divider = 2, .ratio = 9 }, | |
1228 | { .refclk = 38400, .cdclk = 192000, .divider = 2, .ratio = 10 }, | |
1229 | { .refclk = 38400, .cdclk = 307200, .divider = 2, .ratio = 16 }, | |
1230 | { .refclk = 38400, .cdclk = 326400, .divider = 4, .ratio = 34 }, | |
1231 | { .refclk = 38400, .cdclk = 556800, .divider = 2, .ratio = 29 }, | |
1232 | { .refclk = 38400, .cdclk = 652800, .divider = 2, .ratio = 34 }, | |
1233 | {} | |
1234 | }; | |
1235 | ||
1236 | static int bxt_calc_cdclk(struct drm_i915_private *dev_priv, int min_cdclk) | |
1237 | { | |
1238 | const struct intel_cdclk_vals *table = dev_priv->cdclk.table; | |
1239 | int i; | |
1240 | ||
1241 | for (i = 0; table[i].refclk; i++) | |
1242 | if (table[i].refclk == dev_priv->cdclk.hw.ref && | |
1243 | table[i].cdclk >= min_cdclk) | |
1244 | return table[i].cdclk; | |
1245 | ||
aff35110 PB |
1246 | drm_WARN(&dev_priv->drm, 1, |
1247 | "Cannot satisfy minimum cdclk %d with refclk %u\n", | |
1248 | min_cdclk, dev_priv->cdclk.hw.ref); | |
736da811 | 1249 | return 0; |
7ff89ca2 VS |
1250 | } |
1251 | ||
736da811 | 1252 | static int bxt_calc_cdclk_pll_vco(struct drm_i915_private *dev_priv, int cdclk) |
7ff89ca2 | 1253 | { |
736da811 MR |
1254 | const struct intel_cdclk_vals *table = dev_priv->cdclk.table; |
1255 | int i; | |
1256 | ||
1257 | if (cdclk == dev_priv->cdclk.hw.bypass) | |
1258 | return 0; | |
1259 | ||
1260 | for (i = 0; table[i].refclk; i++) | |
1261 | if (table[i].refclk == dev_priv->cdclk.hw.ref && | |
1262 | table[i].cdclk == cdclk) | |
1263 | return dev_priv->cdclk.hw.ref * table[i].ratio; | |
1264 | ||
aff35110 PB |
1265 | drm_WARN(&dev_priv->drm, 1, "cdclk %d not valid for refclk %u\n", |
1266 | cdclk, dev_priv->cdclk.hw.ref); | |
736da811 | 1267 | return 0; |
7ff89ca2 VS |
1268 | } |
1269 | ||
2123f442 VS |
1270 | static u8 bxt_calc_voltage_level(int cdclk) |
1271 | { | |
1272 | return DIV_ROUND_UP(cdclk, 25000); | |
1273 | } | |
1274 | ||
71dc367e MR |
1275 | static u8 cnl_calc_voltage_level(int cdclk) |
1276 | { | |
1277 | if (cdclk > 336000) | |
1278 | return 2; | |
1279 | else if (cdclk > 168000) | |
1280 | return 1; | |
1281 | else | |
1282 | return 0; | |
1283 | } | |
1284 | ||
1285 | static u8 icl_calc_voltage_level(int cdclk) | |
1286 | { | |
1287 | if (cdclk > 556800) | |
1288 | return 2; | |
1289 | else if (cdclk > 312000) | |
1290 | return 1; | |
1291 | else | |
1292 | return 0; | |
1293 | } | |
1294 | ||
1295 | static u8 ehl_calc_voltage_level(int cdclk) | |
1296 | { | |
d1474838 MR |
1297 | if (cdclk > 326400) |
1298 | return 3; | |
1299 | else if (cdclk > 312000) | |
71dc367e MR |
1300 | return 2; |
1301 | else if (cdclk > 180000) | |
1302 | return 1; | |
1303 | else | |
1304 | return 0; | |
1305 | } | |
1306 | ||
0fde0b1d MR |
1307 | static u8 tgl_calc_voltage_level(int cdclk) |
1308 | { | |
1309 | if (cdclk > 556800) | |
1310 | return 3; | |
1311 | else if (cdclk > 326400) | |
1312 | return 2; | |
1313 | else if (cdclk > 312000) | |
1314 | return 1; | |
1315 | else | |
1316 | return 0; | |
1317 | } | |
1318 | ||
71dc367e | 1319 | static void cnl_readout_refclk(struct drm_i915_private *dev_priv, |
0bb94e03 | 1320 | struct intel_cdclk_config *cdclk_config) |
7ff89ca2 | 1321 | { |
3e9f55df | 1322 | if (intel_de_read(dev_priv, SKL_DSSM) & CNL_DSSM_CDCLK_PLL_REFCLK_24MHz) |
0bb94e03 | 1323 | cdclk_config->ref = 24000; |
71dc367e | 1324 | else |
0bb94e03 | 1325 | cdclk_config->ref = 19200; |
71dc367e | 1326 | } |
7ff89ca2 | 1327 | |
71dc367e | 1328 | static void icl_readout_refclk(struct drm_i915_private *dev_priv, |
0bb94e03 | 1329 | struct intel_cdclk_config *cdclk_config) |
71dc367e | 1330 | { |
3e9f55df | 1331 | u32 dssm = intel_de_read(dev_priv, SKL_DSSM) & ICL_DSSM_CDCLK_PLL_REFCLK_MASK; |
71dc367e MR |
1332 | |
1333 | switch (dssm) { | |
1334 | default: | |
1335 | MISSING_CASE(dssm); | |
1336 | /* fall through */ | |
1337 | case ICL_DSSM_CDCLK_PLL_REFCLK_24MHz: | |
0bb94e03 | 1338 | cdclk_config->ref = 24000; |
71dc367e MR |
1339 | break; |
1340 | case ICL_DSSM_CDCLK_PLL_REFCLK_19_2MHz: | |
0bb94e03 | 1341 | cdclk_config->ref = 19200; |
71dc367e MR |
1342 | break; |
1343 | case ICL_DSSM_CDCLK_PLL_REFCLK_38_4MHz: | |
0bb94e03 | 1344 | cdclk_config->ref = 38400; |
71dc367e MR |
1345 | break; |
1346 | } | |
1347 | } | |
1348 | ||
1349 | static void bxt_de_pll_readout(struct drm_i915_private *dev_priv, | |
0bb94e03 | 1350 | struct intel_cdclk_config *cdclk_config) |
71dc367e MR |
1351 | { |
1352 | u32 val, ratio; | |
1353 | ||
1354 | if (INTEL_GEN(dev_priv) >= 11) | |
0bb94e03 | 1355 | icl_readout_refclk(dev_priv, cdclk_config); |
71dc367e | 1356 | else if (IS_CANNONLAKE(dev_priv)) |
0bb94e03 | 1357 | cnl_readout_refclk(dev_priv, cdclk_config); |
71dc367e | 1358 | else |
0bb94e03 | 1359 | cdclk_config->ref = 19200; |
7ff89ca2 | 1360 | |
3e9f55df | 1361 | val = intel_de_read(dev_priv, BXT_DE_PLL_ENABLE); |
71dc367e MR |
1362 | if ((val & BXT_DE_PLL_PLL_ENABLE) == 0 || |
1363 | (val & BXT_DE_PLL_LOCK) == 0) { | |
1364 | /* | |
1365 | * CDCLK PLL is disabled, the VCO/ratio doesn't matter, but | |
1366 | * setting it to zero is a way to signal that. | |
1367 | */ | |
0bb94e03 | 1368 | cdclk_config->vco = 0; |
7ff89ca2 | 1369 | return; |
71dc367e | 1370 | } |
7ff89ca2 | 1371 | |
71dc367e MR |
1372 | /* |
1373 | * CNL+ have the ratio directly in the PLL enable register, gen9lp had | |
1374 | * it in a separate PLL control register. | |
1375 | */ | |
1376 | if (INTEL_GEN(dev_priv) >= 10) | |
1377 | ratio = val & CNL_CDCLK_PLL_RATIO_MASK; | |
1378 | else | |
3e9f55df | 1379 | ratio = intel_de_read(dev_priv, BXT_DE_PLL_CTL) & BXT_DE_PLL_RATIO_MASK; |
7ff89ca2 | 1380 | |
0bb94e03 | 1381 | cdclk_config->vco = ratio * cdclk_config->ref; |
7ff89ca2 VS |
1382 | } |
1383 | ||
49cd97a3 | 1384 | static void bxt_get_cdclk(struct drm_i915_private *dev_priv, |
0bb94e03 | 1385 | struct intel_cdclk_config *cdclk_config) |
7ff89ca2 VS |
1386 | { |
1387 | u32 divider; | |
49cd97a3 | 1388 | int div; |
7ff89ca2 | 1389 | |
0bb94e03 | 1390 | bxt_de_pll_readout(dev_priv, cdclk_config); |
74689ddf | 1391 | |
71dc367e | 1392 | if (INTEL_GEN(dev_priv) >= 12) |
0bb94e03 | 1393 | cdclk_config->bypass = cdclk_config->ref / 2; |
71dc367e | 1394 | else if (INTEL_GEN(dev_priv) >= 11) |
0bb94e03 | 1395 | cdclk_config->bypass = 50000; |
71dc367e | 1396 | else |
0bb94e03 | 1397 | cdclk_config->bypass = cdclk_config->ref; |
49cd97a3 | 1398 | |
0bb94e03 VS |
1399 | if (cdclk_config->vco == 0) { |
1400 | cdclk_config->cdclk = cdclk_config->bypass; | |
2123f442 | 1401 | goto out; |
71dc367e | 1402 | } |
7ff89ca2 | 1403 | |
3e9f55df | 1404 | divider = intel_de_read(dev_priv, CDCLK_CTL) & BXT_CDCLK_CD2X_DIV_SEL_MASK; |
7ff89ca2 VS |
1405 | |
1406 | switch (divider) { | |
1407 | case BXT_CDCLK_CD2X_DIV_SEL_1: | |
1408 | div = 2; | |
1409 | break; | |
1410 | case BXT_CDCLK_CD2X_DIV_SEL_1_5: | |
aff35110 PB |
1411 | drm_WARN(&dev_priv->drm, |
1412 | IS_GEMINILAKE(dev_priv) || INTEL_GEN(dev_priv) >= 10, | |
1413 | "Unsupported divider\n"); | |
7ff89ca2 VS |
1414 | div = 3; |
1415 | break; | |
1416 | case BXT_CDCLK_CD2X_DIV_SEL_2: | |
1417 | div = 4; | |
1418 | break; | |
1419 | case BXT_CDCLK_CD2X_DIV_SEL_4: | |
aff35110 PB |
1420 | drm_WARN(&dev_priv->drm, INTEL_GEN(dev_priv) >= 10, |
1421 | "Unsupported divider\n"); | |
7ff89ca2 VS |
1422 | div = 8; |
1423 | break; | |
1424 | default: | |
1425 | MISSING_CASE(divider); | |
49cd97a3 | 1426 | return; |
7ff89ca2 VS |
1427 | } |
1428 | ||
0bb94e03 | 1429 | cdclk_config->cdclk = DIV_ROUND_CLOSEST(cdclk_config->vco, div); |
2123f442 VS |
1430 | |
1431 | out: | |
1432 | /* | |
1433 | * Can't read this out :( Let's assume it's | |
1434 | * at least what the CDCLK frequency requires. | |
1435 | */ | |
0bb94e03 VS |
1436 | cdclk_config->voltage_level = |
1437 | dev_priv->display.calc_voltage_level(cdclk_config->cdclk); | |
7ff89ca2 VS |
1438 | } |
1439 | ||
1440 | static void bxt_de_pll_disable(struct drm_i915_private *dev_priv) | |
1441 | { | |
3e9f55df | 1442 | intel_de_write(dev_priv, BXT_DE_PLL_ENABLE, 0); |
7ff89ca2 VS |
1443 | |
1444 | /* Timeout 200us */ | |
4cb3b44d DCS |
1445 | if (intel_de_wait_for_clear(dev_priv, |
1446 | BXT_DE_PLL_ENABLE, BXT_DE_PLL_LOCK, 1)) | |
23194610 | 1447 | drm_err(&dev_priv->drm, "timeout waiting for DE PLL unlock\n"); |
7ff89ca2 | 1448 | |
49cd97a3 | 1449 | dev_priv->cdclk.hw.vco = 0; |
7ff89ca2 VS |
1450 | } |
1451 | ||
1452 | static void bxt_de_pll_enable(struct drm_i915_private *dev_priv, int vco) | |
1453 | { | |
49cd97a3 | 1454 | int ratio = DIV_ROUND_CLOSEST(vco, dev_priv->cdclk.hw.ref); |
7ff89ca2 VS |
1455 | u32 val; |
1456 | ||
3e9f55df | 1457 | val = intel_de_read(dev_priv, BXT_DE_PLL_CTL); |
7ff89ca2 VS |
1458 | val &= ~BXT_DE_PLL_RATIO_MASK; |
1459 | val |= BXT_DE_PLL_RATIO(ratio); | |
3e9f55df | 1460 | intel_de_write(dev_priv, BXT_DE_PLL_CTL, val); |
7ff89ca2 | 1461 | |
3e9f55df | 1462 | intel_de_write(dev_priv, BXT_DE_PLL_ENABLE, BXT_DE_PLL_PLL_ENABLE); |
7ff89ca2 VS |
1463 | |
1464 | /* Timeout 200us */ | |
4cb3b44d DCS |
1465 | if (intel_de_wait_for_set(dev_priv, |
1466 | BXT_DE_PLL_ENABLE, BXT_DE_PLL_LOCK, 1)) | |
23194610 | 1467 | drm_err(&dev_priv->drm, "timeout waiting for DE PLL lock\n"); |
7ff89ca2 | 1468 | |
49cd97a3 | 1469 | dev_priv->cdclk.hw.vco = vco; |
7ff89ca2 VS |
1470 | } |
1471 | ||
1cbcd3b4 MR |
1472 | static void cnl_cdclk_pll_disable(struct drm_i915_private *dev_priv) |
1473 | { | |
1474 | u32 val; | |
1475 | ||
3e9f55df | 1476 | val = intel_de_read(dev_priv, BXT_DE_PLL_ENABLE); |
1cbcd3b4 | 1477 | val &= ~BXT_DE_PLL_PLL_ENABLE; |
3e9f55df | 1478 | intel_de_write(dev_priv, BXT_DE_PLL_ENABLE, val); |
1cbcd3b4 MR |
1479 | |
1480 | /* Timeout 200us */ | |
3e9f55df | 1481 | if (wait_for((intel_de_read(dev_priv, BXT_DE_PLL_ENABLE) & BXT_DE_PLL_LOCK) == 0, 1)) |
23194610 WK |
1482 | drm_err(&dev_priv->drm, |
1483 | "timeout waiting for CDCLK PLL unlock\n"); | |
1cbcd3b4 MR |
1484 | |
1485 | dev_priv->cdclk.hw.vco = 0; | |
1486 | } | |
1487 | ||
1488 | static void cnl_cdclk_pll_enable(struct drm_i915_private *dev_priv, int vco) | |
1489 | { | |
1490 | int ratio = DIV_ROUND_CLOSEST(vco, dev_priv->cdclk.hw.ref); | |
1491 | u32 val; | |
1492 | ||
1493 | val = CNL_CDCLK_PLL_RATIO(ratio); | |
3e9f55df | 1494 | intel_de_write(dev_priv, BXT_DE_PLL_ENABLE, val); |
1cbcd3b4 MR |
1495 | |
1496 | val |= BXT_DE_PLL_PLL_ENABLE; | |
3e9f55df | 1497 | intel_de_write(dev_priv, BXT_DE_PLL_ENABLE, val); |
1cbcd3b4 MR |
1498 | |
1499 | /* Timeout 200us */ | |
3e9f55df | 1500 | if (wait_for((intel_de_read(dev_priv, BXT_DE_PLL_ENABLE) & BXT_DE_PLL_LOCK) != 0, 1)) |
23194610 WK |
1501 | drm_err(&dev_priv->drm, |
1502 | "timeout waiting for CDCLK PLL lock\n"); | |
1cbcd3b4 MR |
1503 | |
1504 | dev_priv->cdclk.hw.vco = vco; | |
1505 | } | |
1506 | ||
0a12e437 VS |
1507 | static u32 bxt_cdclk_cd2x_pipe(struct drm_i915_private *dev_priv, enum pipe pipe) |
1508 | { | |
1509 | if (INTEL_GEN(dev_priv) >= 12) { | |
1510 | if (pipe == INVALID_PIPE) | |
1511 | return TGL_CDCLK_CD2X_PIPE_NONE; | |
1512 | else | |
1513 | return TGL_CDCLK_CD2X_PIPE(pipe); | |
1514 | } else if (INTEL_GEN(dev_priv) >= 11) { | |
1515 | if (pipe == INVALID_PIPE) | |
1516 | return ICL_CDCLK_CD2X_PIPE_NONE; | |
1517 | else | |
1518 | return ICL_CDCLK_CD2X_PIPE(pipe); | |
1519 | } else { | |
1520 | if (pipe == INVALID_PIPE) | |
1521 | return BXT_CDCLK_CD2X_PIPE_NONE; | |
1522 | else | |
1523 | return BXT_CDCLK_CD2X_PIPE(pipe); | |
1524 | } | |
1525 | } | |
1526 | ||
8f0cfa4d | 1527 | static void bxt_set_cdclk(struct drm_i915_private *dev_priv, |
0bb94e03 | 1528 | const struct intel_cdclk_config *cdclk_config, |
59f9e9ca | 1529 | enum pipe pipe) |
7ff89ca2 | 1530 | { |
0bb94e03 VS |
1531 | int cdclk = cdclk_config->cdclk; |
1532 | int vco = cdclk_config->vco; | |
7ff89ca2 | 1533 | u32 val, divider; |
8f0cfa4d | 1534 | int ret; |
7ff89ca2 | 1535 | |
1cbcd3b4 MR |
1536 | /* Inform power controller of upcoming frequency change. */ |
1537 | if (INTEL_GEN(dev_priv) >= 10) | |
1538 | ret = skl_pcode_request(dev_priv, SKL_PCODE_CDCLK_CONTROL, | |
1539 | SKL_CDCLK_PREPARE_FOR_CHANGE, | |
1540 | SKL_CDCLK_READY_FOR_CHANGE, | |
1541 | SKL_CDCLK_READY_FOR_CHANGE, 3); | |
1542 | else | |
1543 | /* | |
1544 | * BSpec requires us to wait up to 150usec, but that leads to | |
1545 | * timeouts; the 2ms used here is based on experiment. | |
1546 | */ | |
1547 | ret = sandybridge_pcode_write_timeout(dev_priv, | |
1548 | HSW_PCODE_DE_WRITE_FREQ_REQ, | |
1549 | 0x80000000, 150, 2); | |
1550 | ||
1551 | if (ret) { | |
23194610 WK |
1552 | drm_err(&dev_priv->drm, |
1553 | "Failed to inform PCU about cdclk change (err %d, freq %d)\n", | |
1554 | ret, cdclk); | |
1cbcd3b4 MR |
1555 | return; |
1556 | } | |
1557 | ||
7ff89ca2 VS |
1558 | /* cdclk = vco / 2 / div{1,1.5,2,4} */ |
1559 | switch (DIV_ROUND_CLOSEST(vco, cdclk)) { | |
2b58417f | 1560 | default: |
aff35110 PB |
1561 | drm_WARN_ON(&dev_priv->drm, |
1562 | cdclk != dev_priv->cdclk.hw.bypass); | |
1563 | drm_WARN_ON(&dev_priv->drm, vco != 0); | |
2b58417f VS |
1564 | /* fall through */ |
1565 | case 2: | |
1566 | divider = BXT_CDCLK_CD2X_DIV_SEL_1; | |
7ff89ca2 VS |
1567 | break; |
1568 | case 3: | |
aff35110 PB |
1569 | drm_WARN(&dev_priv->drm, |
1570 | IS_GEMINILAKE(dev_priv) || INTEL_GEN(dev_priv) >= 10, | |
1571 | "Unsupported divider\n"); | |
7ff89ca2 VS |
1572 | divider = BXT_CDCLK_CD2X_DIV_SEL_1_5; |
1573 | break; | |
2b58417f VS |
1574 | case 4: |
1575 | divider = BXT_CDCLK_CD2X_DIV_SEL_2; | |
7ff89ca2 | 1576 | break; |
2b58417f | 1577 | case 8: |
aff35110 PB |
1578 | drm_WARN(&dev_priv->drm, INTEL_GEN(dev_priv) >= 10, |
1579 | "Unsupported divider\n"); | |
2b58417f | 1580 | divider = BXT_CDCLK_CD2X_DIV_SEL_4; |
7ff89ca2 VS |
1581 | break; |
1582 | } | |
1583 | ||
1cbcd3b4 MR |
1584 | if (INTEL_GEN(dev_priv) >= 10) { |
1585 | if (dev_priv->cdclk.hw.vco != 0 && | |
1586 | dev_priv->cdclk.hw.vco != vco) | |
1587 | cnl_cdclk_pll_disable(dev_priv); | |
7ff89ca2 | 1588 | |
1cbcd3b4 MR |
1589 | if (dev_priv->cdclk.hw.vco != vco) |
1590 | cnl_cdclk_pll_enable(dev_priv, vco); | |
7ff89ca2 | 1591 | |
1cbcd3b4 MR |
1592 | } else { |
1593 | if (dev_priv->cdclk.hw.vco != 0 && | |
1594 | dev_priv->cdclk.hw.vco != vco) | |
1595 | bxt_de_pll_disable(dev_priv); | |
1596 | ||
1597 | if (dev_priv->cdclk.hw.vco != vco) | |
1598 | bxt_de_pll_enable(dev_priv, vco); | |
1599 | } | |
7ff89ca2 | 1600 | |
0a12e437 VS |
1601 | val = divider | skl_cdclk_decimal(cdclk) | |
1602 | bxt_cdclk_cd2x_pipe(dev_priv, pipe); | |
1cbcd3b4 | 1603 | |
7ff89ca2 VS |
1604 | /* |
1605 | * Disable SSA Precharge when CD clock frequency < 500 MHz, | |
1606 | * enable otherwise. | |
1607 | */ | |
1cbcd3b4 | 1608 | if (IS_GEN9_LP(dev_priv) && cdclk >= 500000) |
7ff89ca2 | 1609 | val |= BXT_CDCLK_SSA_PRECHARGE_ENABLE; |
3e9f55df | 1610 | intel_de_write(dev_priv, CDCLK_CTL, val); |
7ff89ca2 | 1611 | |
59f9e9ca VS |
1612 | if (pipe != INVALID_PIPE) |
1613 | intel_wait_for_vblank(dev_priv, pipe); | |
1614 | ||
1cbcd3b4 MR |
1615 | if (INTEL_GEN(dev_priv) >= 10) { |
1616 | ret = sandybridge_pcode_write(dev_priv, SKL_PCODE_CDCLK_CONTROL, | |
0bb94e03 | 1617 | cdclk_config->voltage_level); |
1cbcd3b4 MR |
1618 | } else { |
1619 | /* | |
1620 | * The timeout isn't specified, the 2ms used here is based on | |
1621 | * experiment. | |
1622 | * FIXME: Waiting for the request completion could be delayed | |
1623 | * until the next PCODE request based on BSpec. | |
1624 | */ | |
1625 | ret = sandybridge_pcode_write_timeout(dev_priv, | |
1626 | HSW_PCODE_DE_WRITE_FREQ_REQ, | |
0bb94e03 | 1627 | cdclk_config->voltage_level, |
1cbcd3b4 MR |
1628 | 150, 2); |
1629 | } | |
1630 | ||
7ff89ca2 | 1631 | if (ret) { |
23194610 WK |
1632 | drm_err(&dev_priv->drm, |
1633 | "PCode CDCLK freq set failed, (err %d, freq %d)\n", | |
1634 | ret, cdclk); | |
7ff89ca2 VS |
1635 | return; |
1636 | } | |
1637 | ||
1638 | intel_update_cdclk(dev_priv); | |
1cbcd3b4 MR |
1639 | |
1640 | if (INTEL_GEN(dev_priv) >= 10) | |
1641 | /* | |
1642 | * Can't read out the voltage level :( | |
1643 | * Let's just assume everything is as expected. | |
1644 | */ | |
0bb94e03 | 1645 | dev_priv->cdclk.hw.voltage_level = cdclk_config->voltage_level; |
7ff89ca2 VS |
1646 | } |
1647 | ||
1648 | static void bxt_sanitize_cdclk(struct drm_i915_private *dev_priv) | |
1649 | { | |
1650 | u32 cdctl, expected; | |
8f9f717d | 1651 | int cdclk, vco; |
7ff89ca2 VS |
1652 | |
1653 | intel_update_cdclk(dev_priv); | |
0bb94e03 | 1654 | intel_dump_cdclk_config(&dev_priv->cdclk.hw, "Current CDCLK"); |
7ff89ca2 | 1655 | |
49cd97a3 | 1656 | if (dev_priv->cdclk.hw.vco == 0 || |
b6c51c3e | 1657 | dev_priv->cdclk.hw.cdclk == dev_priv->cdclk.hw.bypass) |
7ff89ca2 VS |
1658 | goto sanitize; |
1659 | ||
1660 | /* DPLL okay; verify the cdclock | |
1661 | * | |
1662 | * Some BIOS versions leave an incorrect decimal frequency value and | |
1663 | * set reserved MBZ bits in CDCLK_CTL at least during exiting from S4, | |
1664 | * so sanitize this register. | |
1665 | */ | |
3e9f55df | 1666 | cdctl = intel_de_read(dev_priv, CDCLK_CTL); |
7ff89ca2 VS |
1667 | /* |
1668 | * Let's ignore the pipe field, since BIOS could have configured the | |
1669 | * dividers both synching to an active pipe, or asynchronously | |
1670 | * (PIPE_NONE). | |
1671 | */ | |
0a12e437 | 1672 | cdctl &= ~bxt_cdclk_cd2x_pipe(dev_priv, INVALID_PIPE); |
7ff89ca2 | 1673 | |
8f9f717d MR |
1674 | /* Make sure this is a legal cdclk value for the platform */ |
1675 | cdclk = bxt_calc_cdclk(dev_priv, dev_priv->cdclk.hw.cdclk); | |
1676 | if (cdclk != dev_priv->cdclk.hw.cdclk) | |
1677 | goto sanitize; | |
1678 | ||
1679 | /* Make sure the VCO is correct for the cdclk */ | |
1680 | vco = bxt_calc_cdclk_pll_vco(dev_priv, cdclk); | |
1681 | if (vco != dev_priv->cdclk.hw.vco) | |
1682 | goto sanitize; | |
1683 | ||
1684 | expected = skl_cdclk_decimal(cdclk); | |
1685 | ||
1686 | /* Figure out what CD2X divider we should be using for this cdclk */ | |
1687 | switch (DIV_ROUND_CLOSEST(dev_priv->cdclk.hw.vco, | |
1688 | dev_priv->cdclk.hw.cdclk)) { | |
1689 | case 2: | |
1690 | expected |= BXT_CDCLK_CD2X_DIV_SEL_1; | |
1691 | break; | |
1692 | case 3: | |
1693 | expected |= BXT_CDCLK_CD2X_DIV_SEL_1_5; | |
1694 | break; | |
1695 | case 4: | |
1696 | expected |= BXT_CDCLK_CD2X_DIV_SEL_2; | |
1697 | break; | |
1698 | case 8: | |
1699 | expected |= BXT_CDCLK_CD2X_DIV_SEL_4; | |
1700 | break; | |
1701 | default: | |
1702 | goto sanitize; | |
1703 | } | |
1704 | ||
7ff89ca2 VS |
1705 | /* |
1706 | * Disable SSA Precharge when CD clock frequency < 500 MHz, | |
1707 | * enable otherwise. | |
1708 | */ | |
5dac256b | 1709 | if (IS_GEN9_LP(dev_priv) && dev_priv->cdclk.hw.cdclk >= 500000) |
7ff89ca2 VS |
1710 | expected |= BXT_CDCLK_SSA_PRECHARGE_ENABLE; |
1711 | ||
1712 | if (cdctl == expected) | |
1713 | /* All well; nothing to sanitize */ | |
1714 | return; | |
1715 | ||
1716 | sanitize: | |
23194610 | 1717 | drm_dbg_kms(&dev_priv->drm, "Sanitizing cdclk programmed by pre-os\n"); |
7ff89ca2 VS |
1718 | |
1719 | /* force cdclk programming */ | |
49cd97a3 | 1720 | dev_priv->cdclk.hw.cdclk = 0; |
7ff89ca2 VS |
1721 | |
1722 | /* force full PLL disable + enable */ | |
49cd97a3 | 1723 | dev_priv->cdclk.hw.vco = -1; |
7ff89ca2 VS |
1724 | } |
1725 | ||
ed645eee | 1726 | static void bxt_cdclk_init_hw(struct drm_i915_private *dev_priv) |
7ff89ca2 | 1727 | { |
0bb94e03 | 1728 | struct intel_cdclk_config cdclk_config; |
7ff89ca2 VS |
1729 | |
1730 | bxt_sanitize_cdclk(dev_priv); | |
1731 | ||
49cd97a3 VS |
1732 | if (dev_priv->cdclk.hw.cdclk != 0 && |
1733 | dev_priv->cdclk.hw.vco != 0) | |
7ff89ca2 VS |
1734 | return; |
1735 | ||
0bb94e03 | 1736 | cdclk_config = dev_priv->cdclk.hw; |
83c5fda7 | 1737 | |
7ff89ca2 VS |
1738 | /* |
1739 | * FIXME: | |
1740 | * - The initial CDCLK needs to be read from VBT. | |
1741 | * Need to make this change after VBT has changes for BXT. | |
1742 | */ | |
0bb94e03 VS |
1743 | cdclk_config.cdclk = bxt_calc_cdclk(dev_priv, 0); |
1744 | cdclk_config.vco = bxt_calc_cdclk_pll_vco(dev_priv, cdclk_config.cdclk); | |
1745 | cdclk_config.voltage_level = | |
1746 | dev_priv->display.calc_voltage_level(cdclk_config.cdclk); | |
7ff89ca2 | 1747 | |
0bb94e03 | 1748 | bxt_set_cdclk(dev_priv, &cdclk_config, INVALID_PIPE); |
7ff89ca2 VS |
1749 | } |
1750 | ||
ed645eee | 1751 | static void bxt_cdclk_uninit_hw(struct drm_i915_private *dev_priv) |
7ff89ca2 | 1752 | { |
0bb94e03 | 1753 | struct intel_cdclk_config cdclk_config = dev_priv->cdclk.hw; |
83c5fda7 | 1754 | |
0bb94e03 VS |
1755 | cdclk_config.cdclk = cdclk_config.bypass; |
1756 | cdclk_config.vco = 0; | |
1757 | cdclk_config.voltage_level = | |
1758 | dev_priv->display.calc_voltage_level(cdclk_config.cdclk); | |
83c5fda7 | 1759 | |
0bb94e03 | 1760 | bxt_set_cdclk(dev_priv, &cdclk_config, INVALID_PIPE); |
49cd97a3 VS |
1761 | } |
1762 | ||
93a643f2 | 1763 | /** |
ed645eee | 1764 | * intel_cdclk_init_hw - Initialize CDCLK hardware |
93a643f2 JN |
1765 | * @i915: i915 device |
1766 | * | |
1767 | * Initialize CDCLK. This consists mainly of initializing dev_priv->cdclk.hw and | |
1768 | * sanitizing the state of the hardware if needed. This is generally done only | |
1769 | * during the display core initialization sequence, after which the DMC will | |
1770 | * take care of turning CDCLK off/on as needed. | |
1771 | */ | |
ed645eee | 1772 | void intel_cdclk_init_hw(struct drm_i915_private *i915) |
93a643f2 | 1773 | { |
0c1279b5 | 1774 | if (IS_GEN9_LP(i915) || INTEL_GEN(i915) >= 10) |
ed645eee | 1775 | bxt_cdclk_init_hw(i915); |
93a643f2 | 1776 | else if (IS_GEN9_BC(i915)) |
ed645eee | 1777 | skl_cdclk_init_hw(i915); |
93a643f2 JN |
1778 | } |
1779 | ||
1780 | /** | |
ed645eee | 1781 | * intel_cdclk_uninit_hw - Uninitialize CDCLK hardware |
93a643f2 JN |
1782 | * @i915: i915 device |
1783 | * | |
1784 | * Uninitialize CDCLK. This is done only during the display core | |
1785 | * uninitialization sequence. | |
1786 | */ | |
ed645eee | 1787 | void intel_cdclk_uninit_hw(struct drm_i915_private *i915) |
93a643f2 | 1788 | { |
751a93a1 | 1789 | if (INTEL_GEN(i915) >= 10 || IS_GEN9_LP(i915)) |
ed645eee | 1790 | bxt_cdclk_uninit_hw(i915); |
93a643f2 | 1791 | else if (IS_GEN9_BC(i915)) |
ed645eee | 1792 | skl_cdclk_uninit_hw(i915); |
93a643f2 JN |
1793 | } |
1794 | ||
49cd97a3 | 1795 | /** |
0bb94e03 VS |
1796 | * intel_cdclk_needs_modeset - Determine if changong between the CDCLK |
1797 | * configurations requires a modeset on all pipes | |
1798 | * @a: first CDCLK configuration | |
1799 | * @b: second CDCLK configuration | |
49cd97a3 VS |
1800 | * |
1801 | * Returns: | |
0bb94e03 VS |
1802 | * True if changing between the two CDCLK configurations |
1803 | * requires all pipes to be off, false if not. | |
49cd97a3 | 1804 | */ |
0bb94e03 VS |
1805 | bool intel_cdclk_needs_modeset(const struct intel_cdclk_config *a, |
1806 | const struct intel_cdclk_config *b) | |
49cd97a3 | 1807 | { |
64600bd5 VS |
1808 | return a->cdclk != b->cdclk || |
1809 | a->vco != b->vco || | |
1810 | a->ref != b->ref; | |
1811 | } | |
1812 | ||
59f9e9ca | 1813 | /** |
0bb94e03 VS |
1814 | * intel_cdclk_can_cd2x_update - Determine if changing between the two CDCLK |
1815 | * configurations requires only a cd2x divider update | |
1816 | * @dev_priv: i915 device | |
1817 | * @a: first CDCLK configuration | |
1818 | * @b: second CDCLK configuration | |
59f9e9ca VS |
1819 | * |
1820 | * Returns: | |
0bb94e03 VS |
1821 | * True if changing between the two CDCLK configurations |
1822 | * can be done with just a cd2x divider update, false if not. | |
59f9e9ca | 1823 | */ |
65c88a86 | 1824 | static bool intel_cdclk_can_cd2x_update(struct drm_i915_private *dev_priv, |
0bb94e03 VS |
1825 | const struct intel_cdclk_config *a, |
1826 | const struct intel_cdclk_config *b) | |
59f9e9ca VS |
1827 | { |
1828 | /* Older hw doesn't have the capability */ | |
1829 | if (INTEL_GEN(dev_priv) < 10 && !IS_GEN9_LP(dev_priv)) | |
1830 | return false; | |
1831 | ||
1832 | return a->cdclk != b->cdclk && | |
1833 | a->vco == b->vco && | |
1834 | a->ref == b->ref; | |
1835 | } | |
1836 | ||
64600bd5 | 1837 | /** |
0bb94e03 VS |
1838 | * intel_cdclk_changed - Determine if two CDCLK configurations are different |
1839 | * @a: first CDCLK configuration | |
1840 | * @b: second CDCLK configuration | |
64600bd5 VS |
1841 | * |
1842 | * Returns: | |
0bb94e03 | 1843 | * True if the CDCLK configurations don't match, false if they do. |
64600bd5 | 1844 | */ |
0bb94e03 VS |
1845 | static bool intel_cdclk_changed(const struct intel_cdclk_config *a, |
1846 | const struct intel_cdclk_config *b) | |
64600bd5 VS |
1847 | { |
1848 | return intel_cdclk_needs_modeset(a, b) || | |
1849 | a->voltage_level != b->voltage_level; | |
7ff89ca2 VS |
1850 | } |
1851 | ||
0bb94e03 VS |
1852 | void intel_dump_cdclk_config(const struct intel_cdclk_config *cdclk_config, |
1853 | const char *context) | |
cfddadc9 | 1854 | { |
b6c51c3e | 1855 | DRM_DEBUG_DRIVER("%s %d kHz, VCO %d kHz, ref %d kHz, bypass %d kHz, voltage level %d\n", |
0bb94e03 VS |
1856 | context, cdclk_config->cdclk, cdclk_config->vco, |
1857 | cdclk_config->ref, cdclk_config->bypass, | |
1858 | cdclk_config->voltage_level); | |
cfddadc9 VS |
1859 | } |
1860 | ||
b0587e4d | 1861 | /** |
0bb94e03 | 1862 | * intel_set_cdclk - Push the CDCLK configuration to the hardware |
b0587e4d | 1863 | * @dev_priv: i915 device |
0bb94e03 | 1864 | * @cdclk_config: new CDCLK configuration |
59f9e9ca | 1865 | * @pipe: pipe with which to synchronize the update |
b0587e4d VS |
1866 | * |
1867 | * Program the hardware based on the passed in CDCLK state, | |
1868 | * if necessary. | |
1869 | */ | |
59f9e9ca | 1870 | static void intel_set_cdclk(struct drm_i915_private *dev_priv, |
0bb94e03 | 1871 | const struct intel_cdclk_config *cdclk_config, |
59f9e9ca | 1872 | enum pipe pipe) |
b0587e4d | 1873 | { |
bb9ca240 VS |
1874 | struct intel_encoder *encoder; |
1875 | ||
0bb94e03 | 1876 | if (!intel_cdclk_changed(&dev_priv->cdclk.hw, cdclk_config)) |
b0587e4d VS |
1877 | return; |
1878 | ||
aff35110 | 1879 | if (drm_WARN_ON_ONCE(&dev_priv->drm, !dev_priv->display.set_cdclk)) |
b0587e4d VS |
1880 | return; |
1881 | ||
0bb94e03 | 1882 | intel_dump_cdclk_config(cdclk_config, "Changing CDCLK to"); |
b0587e4d | 1883 | |
bb9ca240 VS |
1884 | /* |
1885 | * Lock aux/gmbus while we change cdclk in case those | |
1886 | * functions use cdclk. Not all platforms/ports do, | |
1887 | * but we'll lock them all for simplicity. | |
1888 | */ | |
1889 | mutex_lock(&dev_priv->gmbus_mutex); | |
1890 | for_each_intel_dp(&dev_priv->drm, encoder) { | |
1891 | struct intel_dp *intel_dp = enc_to_intel_dp(encoder); | |
1892 | ||
1893 | mutex_lock_nest_lock(&intel_dp->aux.hw_mutex, | |
1894 | &dev_priv->gmbus_mutex); | |
1895 | } | |
1896 | ||
0bb94e03 | 1897 | dev_priv->display.set_cdclk(dev_priv, cdclk_config, pipe); |
cfddadc9 | 1898 | |
bb9ca240 VS |
1899 | for_each_intel_dp(&dev_priv->drm, encoder) { |
1900 | struct intel_dp *intel_dp = enc_to_intel_dp(encoder); | |
1901 | ||
1902 | mutex_unlock(&intel_dp->aux.hw_mutex); | |
1903 | } | |
1904 | mutex_unlock(&dev_priv->gmbus_mutex); | |
1905 | ||
aff35110 PB |
1906 | if (drm_WARN(&dev_priv->drm, |
1907 | intel_cdclk_changed(&dev_priv->cdclk.hw, cdclk_config), | |
1908 | "cdclk state doesn't match!\n")) { | |
0bb94e03 VS |
1909 | intel_dump_cdclk_config(&dev_priv->cdclk.hw, "[hw state]"); |
1910 | intel_dump_cdclk_config(cdclk_config, "[sw state]"); | |
cfddadc9 | 1911 | } |
b0587e4d VS |
1912 | } |
1913 | ||
59f9e9ca | 1914 | /** |
5604e9ce VS |
1915 | * intel_set_cdclk_pre_plane_update - Push the CDCLK state to the hardware |
1916 | * @state: intel atomic state | |
59f9e9ca | 1917 | * |
5604e9ce VS |
1918 | * Program the hardware before updating the HW plane state based on the |
1919 | * new CDCLK state, if necessary. | |
59f9e9ca VS |
1920 | */ |
1921 | void | |
5604e9ce | 1922 | intel_set_cdclk_pre_plane_update(struct intel_atomic_state *state) |
59f9e9ca | 1923 | { |
5604e9ce | 1924 | struct drm_i915_private *dev_priv = to_i915(state->base.dev); |
28a30b45 VS |
1925 | const struct intel_cdclk_state *old_cdclk_state = |
1926 | intel_atomic_get_old_cdclk_state(state); | |
1927 | const struct intel_cdclk_state *new_cdclk_state = | |
1928 | intel_atomic_get_new_cdclk_state(state); | |
4c029c49 | 1929 | enum pipe pipe = new_cdclk_state->pipe; |
5604e9ce | 1930 | |
28a30b45 VS |
1931 | if (!intel_cdclk_changed(&old_cdclk_state->actual, |
1932 | &new_cdclk_state->actual)) | |
1933 | return; | |
1934 | ||
1965de63 | 1935 | if (pipe == INVALID_PIPE || |
28a30b45 | 1936 | old_cdclk_state->actual.cdclk <= new_cdclk_state->actual.cdclk) { |
aff35110 | 1937 | drm_WARN_ON(&dev_priv->drm, !new_cdclk_state->base.changed); |
28a30b45 | 1938 | |
1965de63 | 1939 | intel_set_cdclk(dev_priv, &new_cdclk_state->actual, pipe); |
28a30b45 | 1940 | } |
59f9e9ca VS |
1941 | } |
1942 | ||
1943 | /** | |
5604e9ce VS |
1944 | * intel_set_cdclk_post_plane_update - Push the CDCLK state to the hardware |
1945 | * @state: intel atomic state | |
59f9e9ca | 1946 | * |
0b02f97f | 1947 | * Program the hardware after updating the HW plane state based on the |
5604e9ce | 1948 | * new CDCLK state, if necessary. |
59f9e9ca VS |
1949 | */ |
1950 | void | |
5604e9ce | 1951 | intel_set_cdclk_post_plane_update(struct intel_atomic_state *state) |
59f9e9ca | 1952 | { |
5604e9ce | 1953 | struct drm_i915_private *dev_priv = to_i915(state->base.dev); |
28a30b45 VS |
1954 | const struct intel_cdclk_state *old_cdclk_state = |
1955 | intel_atomic_get_old_cdclk_state(state); | |
1956 | const struct intel_cdclk_state *new_cdclk_state = | |
1957 | intel_atomic_get_new_cdclk_state(state); | |
4c029c49 | 1958 | enum pipe pipe = new_cdclk_state->pipe; |
5604e9ce | 1959 | |
28a30b45 VS |
1960 | if (!intel_cdclk_changed(&old_cdclk_state->actual, |
1961 | &new_cdclk_state->actual)) | |
1962 | return; | |
1963 | ||
1965de63 | 1964 | if (pipe != INVALID_PIPE && |
28a30b45 | 1965 | old_cdclk_state->actual.cdclk > new_cdclk_state->actual.cdclk) { |
aff35110 | 1966 | drm_WARN_ON(&dev_priv->drm, !new_cdclk_state->base.changed); |
28a30b45 | 1967 | |
1965de63 | 1968 | intel_set_cdclk(dev_priv, &new_cdclk_state->actual, pipe); |
28a30b45 | 1969 | } |
59f9e9ca VS |
1970 | } |
1971 | ||
3e30d708 | 1972 | static int intel_pixel_rate_to_cdclk(const struct intel_crtc_state *crtc_state) |
d305e061 | 1973 | { |
2225f3c6 | 1974 | struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev); |
3e30d708 VS |
1975 | int pixel_rate = crtc_state->pixel_rate; |
1976 | ||
42882336 | 1977 | if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv)) |
43037c86 | 1978 | return DIV_ROUND_UP(pixel_rate, 2); |
cf819eff | 1979 | else if (IS_GEN(dev_priv, 9) || |
d305e061 VS |
1980 | IS_BROADWELL(dev_priv) || IS_HASWELL(dev_priv)) |
1981 | return pixel_rate; | |
1982 | else if (IS_CHERRYVIEW(dev_priv)) | |
1983 | return DIV_ROUND_UP(pixel_rate * 100, 95); | |
3e30d708 VS |
1984 | else if (crtc_state->double_wide) |
1985 | return DIV_ROUND_UP(pixel_rate * 100, 90 * 2); | |
d305e061 VS |
1986 | else |
1987 | return DIV_ROUND_UP(pixel_rate * 100, 90); | |
1988 | } | |
1989 | ||
bb6ae9e6 VS |
1990 | static int intel_planes_min_cdclk(const struct intel_crtc_state *crtc_state) |
1991 | { | |
2225f3c6 | 1992 | struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); |
bb6ae9e6 VS |
1993 | struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); |
1994 | struct intel_plane *plane; | |
1995 | int min_cdclk = 0; | |
1996 | ||
1997 | for_each_intel_plane_on_crtc(&dev_priv->drm, crtc, plane) | |
1998 | min_cdclk = max(crtc_state->min_cdclk[plane->id], min_cdclk); | |
1999 | ||
2000 | return min_cdclk; | |
2001 | } | |
2002 | ||
d305e061 | 2003 | int intel_crtc_compute_min_cdclk(const struct intel_crtc_state *crtc_state) |
7ff89ca2 VS |
2004 | { |
2005 | struct drm_i915_private *dev_priv = | |
2225f3c6 | 2006 | to_i915(crtc_state->uapi.crtc->dev); |
d305e061 VS |
2007 | int min_cdclk; |
2008 | ||
1326a92c | 2009 | if (!crtc_state->hw.enable) |
d305e061 VS |
2010 | return 0; |
2011 | ||
3e30d708 | 2012 | min_cdclk = intel_pixel_rate_to_cdclk(crtc_state); |
7ff89ca2 VS |
2013 | |
2014 | /* pixel rate mustn't exceed 95% of cdclk with IPS on BDW */ | |
24f28450 | 2015 | if (IS_BROADWELL(dev_priv) && hsw_crtc_state_ips_capable(crtc_state)) |
d305e061 | 2016 | min_cdclk = DIV_ROUND_UP(min_cdclk * 100, 95); |
7ff89ca2 | 2017 | |
78cfa580 PD |
2018 | /* BSpec says "Do not use DisplayPort with CDCLK less than 432 MHz, |
2019 | * audio enabled, port width x4, and link rate HBR2 (5.4 GHz), or else | |
2020 | * there may be audio corruption or screen corruption." This cdclk | |
d305e061 | 2021 | * restriction for GLK is 316.8 MHz. |
7ff89ca2 VS |
2022 | */ |
2023 | if (intel_crtc_has_dp_encoder(crtc_state) && | |
2024 | crtc_state->has_audio && | |
2025 | crtc_state->port_clock >= 540000 && | |
78cfa580 | 2026 | crtc_state->lane_count == 4) { |
d305e061 VS |
2027 | if (IS_CANNONLAKE(dev_priv) || IS_GEMINILAKE(dev_priv)) { |
2028 | /* Display WA #1145: glk,cnl */ | |
2029 | min_cdclk = max(316800, min_cdclk); | |
cf819eff | 2030 | } else if (IS_GEN(dev_priv, 9) || IS_BROADWELL(dev_priv)) { |
d305e061 VS |
2031 | /* Display WA #1144: skl,bxt */ |
2032 | min_cdclk = max(432000, min_cdclk); | |
2033 | } | |
78cfa580 | 2034 | } |
7ff89ca2 | 2035 | |
904e1b1f AK |
2036 | /* |
2037 | * According to BSpec, "The CD clock frequency must be at least twice | |
8cbeb06d | 2038 | * the frequency of the Azalia BCLK." and BCLK is 96 MHz by default. |
8cbeb06d | 2039 | */ |
905801fe | 2040 | if (crtc_state->has_audio && INTEL_GEN(dev_priv) >= 9) |
d305e061 | 2041 | min_cdclk = max(2 * 96000, min_cdclk); |
8cbeb06d | 2042 | |
bffb31f7 VS |
2043 | /* |
2044 | * "For DP audio configuration, cdclk frequency shall be set to | |
2045 | * meet the following requirements: | |
2046 | * DP Link Frequency(MHz) | Cdclk frequency(MHz) | |
2047 | * 270 | 320 or higher | |
2048 | * 162 | 200 or higher" | |
2049 | */ | |
2050 | if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) && | |
2051 | intel_crtc_has_dp_encoder(crtc_state) && crtc_state->has_audio) | |
2052 | min_cdclk = max(crtc_state->port_clock, min_cdclk); | |
2053 | ||
c8dae55a HG |
2054 | /* |
2055 | * On Valleyview some DSI panels lose (v|h)sync when the clock is lower | |
2056 | * than 320000KHz. | |
2057 | */ | |
2058 | if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DSI) && | |
2059 | IS_VALLEYVIEW(dev_priv)) | |
2060 | min_cdclk = max(320000, min_cdclk); | |
2061 | ||
beb29980 SL |
2062 | /* |
2063 | * On Geminilake once the CDCLK gets as low as 79200 | |
2064 | * picture gets unstable, despite that values are | |
2065 | * correct for DSI PLL and DE PLL. | |
2066 | */ | |
2067 | if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DSI) && | |
2068 | IS_GEMINILAKE(dev_priv)) | |
2069 | min_cdclk = max(158400, min_cdclk); | |
2070 | ||
bb6ae9e6 VS |
2071 | /* Account for additional needs from the planes */ |
2072 | min_cdclk = max(intel_planes_min_cdclk(crtc_state), min_cdclk); | |
2073 | ||
46d53e27 SL |
2074 | /* |
2075 | * HACK. Currently for TGL platforms we calculate | |
2076 | * min_cdclk initially based on pixel_rate divided | |
2077 | * by 2, accounting for also plane requirements, | |
2078 | * however in some cases the lowest possible CDCLK | |
2079 | * doesn't work and causing the underruns. | |
2080 | * Explicitly stating here that this seems to be currently | |
2081 | * rather a Hack, than final solution. | |
2082 | */ | |
2083 | if (IS_TIGERLAKE(dev_priv)) | |
2084 | min_cdclk = max(min_cdclk, (int)crtc_state->pixel_rate); | |
2085 | ||
9c61de4c | 2086 | if (min_cdclk > dev_priv->max_cdclk_freq) { |
23194610 WK |
2087 | drm_dbg_kms(&dev_priv->drm, |
2088 | "required cdclk (%d kHz) exceeds max (%d kHz)\n", | |
2089 | min_cdclk, dev_priv->max_cdclk_freq); | |
9c61de4c VS |
2090 | return -EINVAL; |
2091 | } | |
2092 | ||
d305e061 | 2093 | return min_cdclk; |
7ff89ca2 VS |
2094 | } |
2095 | ||
28a30b45 | 2096 | static int intel_compute_min_cdclk(struct intel_cdclk_state *cdclk_state) |
7ff89ca2 | 2097 | { |
28a30b45 | 2098 | struct intel_atomic_state *state = cdclk_state->base.state; |
19aefbc7 SL |
2099 | struct drm_i915_private *dev_priv = to_i915(state->base.dev); |
2100 | struct intel_bw_state *bw_state = NULL; | |
d305e061 | 2101 | struct intel_crtc *crtc; |
7ff89ca2 | 2102 | struct intel_crtc_state *crtc_state; |
9c61de4c | 2103 | int min_cdclk, i; |
19aefbc7 | 2104 | enum pipe pipe; |
7ff89ca2 | 2105 | |
8b67896e | 2106 | for_each_new_intel_crtc_in_state(state, crtc, crtc_state, i) { |
1d5a95b5 VS |
2107 | int ret; |
2108 | ||
9c61de4c VS |
2109 | min_cdclk = intel_crtc_compute_min_cdclk(crtc_state); |
2110 | if (min_cdclk < 0) | |
2111 | return min_cdclk; | |
2112 | ||
19aefbc7 SL |
2113 | bw_state = intel_atomic_get_bw_state(state); |
2114 | if (IS_ERR(bw_state)) | |
2115 | return PTR_ERR(bw_state); | |
2116 | ||
1965de63 | 2117 | if (cdclk_state->min_cdclk[i] == min_cdclk) |
1d5a95b5 VS |
2118 | continue; |
2119 | ||
1965de63 | 2120 | cdclk_state->min_cdclk[i] = min_cdclk; |
1d5a95b5 | 2121 | |
28a30b45 | 2122 | ret = intel_atomic_lock_global_state(&cdclk_state->base); |
1d5a95b5 VS |
2123 | if (ret) |
2124 | return ret; | |
9c61de4c | 2125 | } |
7ff89ca2 | 2126 | |
1965de63 | 2127 | min_cdclk = cdclk_state->force_min_cdclk; |
19aefbc7 SL |
2128 | for_each_pipe(dev_priv, pipe) { |
2129 | min_cdclk = max(cdclk_state->min_cdclk[pipe], min_cdclk); | |
cd191546 | 2130 | |
19aefbc7 SL |
2131 | if (!bw_state) |
2132 | continue; | |
cd191546 SL |
2133 | |
2134 | min_cdclk = max(bw_state->min_cdclk, min_cdclk); | |
2135 | } | |
7ff89ca2 | 2136 | |
d305e061 | 2137 | return min_cdclk; |
7ff89ca2 VS |
2138 | } |
2139 | ||
53e9bf5e | 2140 | /* |
933122cc VS |
2141 | * Account for port clock min voltage level requirements. |
2142 | * This only really does something on CNL+ but can be | |
2143 | * called on earlier platforms as well. | |
2144 | * | |
53e9bf5e VS |
2145 | * Note that this functions assumes that 0 is |
2146 | * the lowest voltage value, and higher values | |
2147 | * correspond to increasingly higher voltages. | |
2148 | * | |
2149 | * Should that relationship no longer hold on | |
2150 | * future platforms this code will need to be | |
2151 | * adjusted. | |
2152 | */ | |
28a30b45 | 2153 | static int bxt_compute_min_voltage_level(struct intel_cdclk_state *cdclk_state) |
53e9bf5e | 2154 | { |
28a30b45 | 2155 | struct intel_atomic_state *state = cdclk_state->base.state; |
53e9bf5e VS |
2156 | struct drm_i915_private *dev_priv = to_i915(state->base.dev); |
2157 | struct intel_crtc *crtc; | |
2158 | struct intel_crtc_state *crtc_state; | |
2159 | u8 min_voltage_level; | |
2160 | int i; | |
2161 | enum pipe pipe; | |
2162 | ||
53e9bf5e | 2163 | for_each_new_intel_crtc_in_state(state, crtc, crtc_state, i) { |
1d5a95b5 VS |
2164 | int ret; |
2165 | ||
1326a92c | 2166 | if (crtc_state->hw.enable) |
1d5a95b5 | 2167 | min_voltage_level = crtc_state->min_voltage_level; |
53e9bf5e | 2168 | else |
1d5a95b5 VS |
2169 | min_voltage_level = 0; |
2170 | ||
1965de63 | 2171 | if (cdclk_state->min_voltage_level[i] == min_voltage_level) |
1d5a95b5 VS |
2172 | continue; |
2173 | ||
1965de63 | 2174 | cdclk_state->min_voltage_level[i] = min_voltage_level; |
1d5a95b5 | 2175 | |
28a30b45 | 2176 | ret = intel_atomic_lock_global_state(&cdclk_state->base); |
1d5a95b5 VS |
2177 | if (ret) |
2178 | return ret; | |
53e9bf5e VS |
2179 | } |
2180 | ||
2181 | min_voltage_level = 0; | |
2182 | for_each_pipe(dev_priv, pipe) | |
1965de63 | 2183 | min_voltage_level = max(cdclk_state->min_voltage_level[pipe], |
53e9bf5e VS |
2184 | min_voltage_level); |
2185 | ||
2186 | return min_voltage_level; | |
2187 | } | |
2188 | ||
28a30b45 | 2189 | static int vlv_modeset_calc_cdclk(struct intel_cdclk_state *cdclk_state) |
7ff89ca2 | 2190 | { |
28a30b45 | 2191 | struct intel_atomic_state *state = cdclk_state->base.state; |
8b67896e | 2192 | struct drm_i915_private *dev_priv = to_i915(state->base.dev); |
9c61de4c | 2193 | int min_cdclk, cdclk; |
bb0f4aab | 2194 | |
28a30b45 | 2195 | min_cdclk = intel_compute_min_cdclk(cdclk_state); |
9c61de4c VS |
2196 | if (min_cdclk < 0) |
2197 | return min_cdclk; | |
7ff89ca2 | 2198 | |
9c61de4c | 2199 | cdclk = vlv_calc_cdclk(dev_priv, min_cdclk); |
7ff89ca2 | 2200 | |
1965de63 VS |
2201 | cdclk_state->logical.cdclk = cdclk; |
2202 | cdclk_state->logical.voltage_level = | |
999c5766 | 2203 | vlv_calc_voltage_level(dev_priv, cdclk); |
bb0f4aab | 2204 | |
0c2d5512 | 2205 | if (!cdclk_state->active_pipes) { |
1965de63 | 2206 | cdclk = vlv_calc_cdclk(dev_priv, cdclk_state->force_min_cdclk); |
bb0f4aab | 2207 | |
1965de63 VS |
2208 | cdclk_state->actual.cdclk = cdclk; |
2209 | cdclk_state->actual.voltage_level = | |
999c5766 | 2210 | vlv_calc_voltage_level(dev_priv, cdclk); |
bb0f4aab | 2211 | } else { |
1965de63 | 2212 | cdclk_state->actual = cdclk_state->logical; |
bb0f4aab | 2213 | } |
7ff89ca2 VS |
2214 | |
2215 | return 0; | |
2216 | } | |
2217 | ||
28a30b45 | 2218 | static int bdw_modeset_calc_cdclk(struct intel_cdclk_state *cdclk_state) |
7ff89ca2 | 2219 | { |
9c61de4c VS |
2220 | int min_cdclk, cdclk; |
2221 | ||
28a30b45 | 2222 | min_cdclk = intel_compute_min_cdclk(cdclk_state); |
9c61de4c VS |
2223 | if (min_cdclk < 0) |
2224 | return min_cdclk; | |
7ff89ca2 VS |
2225 | |
2226 | /* | |
2227 | * FIXME should also account for plane ratio | |
2228 | * once 64bpp pixel formats are supported. | |
2229 | */ | |
d305e061 | 2230 | cdclk = bdw_calc_cdclk(min_cdclk); |
7ff89ca2 | 2231 | |
1965de63 VS |
2232 | cdclk_state->logical.cdclk = cdclk; |
2233 | cdclk_state->logical.voltage_level = | |
d7ffaeef | 2234 | bdw_calc_voltage_level(cdclk); |
bb0f4aab | 2235 | |
0c2d5512 | 2236 | if (!cdclk_state->active_pipes) { |
1965de63 | 2237 | cdclk = bdw_calc_cdclk(cdclk_state->force_min_cdclk); |
bb0f4aab | 2238 | |
1965de63 VS |
2239 | cdclk_state->actual.cdclk = cdclk; |
2240 | cdclk_state->actual.voltage_level = | |
d7ffaeef | 2241 | bdw_calc_voltage_level(cdclk); |
bb0f4aab | 2242 | } else { |
1965de63 | 2243 | cdclk_state->actual = cdclk_state->logical; |
bb0f4aab | 2244 | } |
7ff89ca2 VS |
2245 | |
2246 | return 0; | |
2247 | } | |
2248 | ||
28a30b45 | 2249 | static int skl_dpll0_vco(struct intel_cdclk_state *cdclk_state) |
3297234a | 2250 | { |
28a30b45 | 2251 | struct intel_atomic_state *state = cdclk_state->base.state; |
8b67896e | 2252 | struct drm_i915_private *dev_priv = to_i915(state->base.dev); |
3297234a RV |
2253 | struct intel_crtc *crtc; |
2254 | struct intel_crtc_state *crtc_state; | |
2255 | int vco, i; | |
2256 | ||
1965de63 | 2257 | vco = cdclk_state->logical.vco; |
3297234a RV |
2258 | if (!vco) |
2259 | vco = dev_priv->skl_preferred_vco_freq; | |
2260 | ||
8b67896e | 2261 | for_each_new_intel_crtc_in_state(state, crtc, crtc_state, i) { |
1326a92c | 2262 | if (!crtc_state->hw.enable) |
3297234a RV |
2263 | continue; |
2264 | ||
2265 | if (!intel_crtc_has_type(crtc_state, INTEL_OUTPUT_EDP)) | |
2266 | continue; | |
2267 | ||
2268 | /* | |
2269 | * DPLL0 VCO may need to be adjusted to get the correct | |
2270 | * clock for eDP. This will affect cdclk as well. | |
2271 | */ | |
2272 | switch (crtc_state->port_clock / 2) { | |
2273 | case 108000: | |
2274 | case 216000: | |
2275 | vco = 8640000; | |
2276 | break; | |
2277 | default: | |
2278 | vco = 8100000; | |
2279 | break; | |
2280 | } | |
2281 | } | |
2282 | ||
2283 | return vco; | |
2284 | } | |
2285 | ||
28a30b45 | 2286 | static int skl_modeset_calc_cdclk(struct intel_cdclk_state *cdclk_state) |
7ff89ca2 | 2287 | { |
9c61de4c VS |
2288 | int min_cdclk, cdclk, vco; |
2289 | ||
28a30b45 | 2290 | min_cdclk = intel_compute_min_cdclk(cdclk_state); |
9c61de4c VS |
2291 | if (min_cdclk < 0) |
2292 | return min_cdclk; | |
bb0f4aab | 2293 | |
28a30b45 | 2294 | vco = skl_dpll0_vco(cdclk_state); |
7ff89ca2 VS |
2295 | |
2296 | /* | |
2297 | * FIXME should also account for plane ratio | |
2298 | * once 64bpp pixel formats are supported. | |
2299 | */ | |
d305e061 | 2300 | cdclk = skl_calc_cdclk(min_cdclk, vco); |
7ff89ca2 | 2301 | |
1965de63 VS |
2302 | cdclk_state->logical.vco = vco; |
2303 | cdclk_state->logical.cdclk = cdclk; | |
2304 | cdclk_state->logical.voltage_level = | |
2aa97491 | 2305 | skl_calc_voltage_level(cdclk); |
bb0f4aab | 2306 | |
0c2d5512 | 2307 | if (!cdclk_state->active_pipes) { |
1965de63 | 2308 | cdclk = skl_calc_cdclk(cdclk_state->force_min_cdclk, vco); |
bb0f4aab | 2309 | |
1965de63 VS |
2310 | cdclk_state->actual.vco = vco; |
2311 | cdclk_state->actual.cdclk = cdclk; | |
2312 | cdclk_state->actual.voltage_level = | |
2aa97491 | 2313 | skl_calc_voltage_level(cdclk); |
bb0f4aab | 2314 | } else { |
1965de63 | 2315 | cdclk_state->actual = cdclk_state->logical; |
bb0f4aab | 2316 | } |
7ff89ca2 VS |
2317 | |
2318 | return 0; | |
2319 | } | |
2320 | ||
28a30b45 | 2321 | static int bxt_modeset_calc_cdclk(struct intel_cdclk_state *cdclk_state) |
7ff89ca2 | 2322 | { |
28a30b45 | 2323 | struct intel_atomic_state *state = cdclk_state->base.state; |
8b67896e | 2324 | struct drm_i915_private *dev_priv = to_i915(state->base.dev); |
1d5a95b5 | 2325 | int min_cdclk, min_voltage_level, cdclk, vco; |
9c61de4c | 2326 | |
28a30b45 | 2327 | min_cdclk = intel_compute_min_cdclk(cdclk_state); |
9c61de4c VS |
2328 | if (min_cdclk < 0) |
2329 | return min_cdclk; | |
7ff89ca2 | 2330 | |
28a30b45 | 2331 | min_voltage_level = bxt_compute_min_voltage_level(cdclk_state); |
1d5a95b5 VS |
2332 | if (min_voltage_level < 0) |
2333 | return min_voltage_level; | |
2334 | ||
736da811 MR |
2335 | cdclk = bxt_calc_cdclk(dev_priv, min_cdclk); |
2336 | vco = bxt_calc_cdclk_pll_vco(dev_priv, cdclk); | |
bb0f4aab | 2337 | |
1965de63 VS |
2338 | cdclk_state->logical.vco = vco; |
2339 | cdclk_state->logical.cdclk = cdclk; | |
2340 | cdclk_state->logical.voltage_level = | |
1d5a95b5 VS |
2341 | max_t(int, min_voltage_level, |
2342 | dev_priv->display.calc_voltage_level(cdclk)); | |
186a277e | 2343 | |
0c2d5512 | 2344 | if (!cdclk_state->active_pipes) { |
1965de63 | 2345 | cdclk = bxt_calc_cdclk(dev_priv, cdclk_state->force_min_cdclk); |
736da811 | 2346 | vco = bxt_calc_cdclk_pll_vco(dev_priv, cdclk); |
186a277e | 2347 | |
1965de63 VS |
2348 | cdclk_state->actual.vco = vco; |
2349 | cdclk_state->actual.cdclk = cdclk; | |
2350 | cdclk_state->actual.voltage_level = | |
d2f429eb | 2351 | dev_priv->display.calc_voltage_level(cdclk); |
186a277e | 2352 | } else { |
1965de63 | 2353 | cdclk_state->actual = cdclk_state->logical; |
186a277e PZ |
2354 | } |
2355 | ||
2356 | return 0; | |
2357 | } | |
2358 | ||
fe4709a8 VS |
2359 | static int intel_modeset_all_pipes(struct intel_atomic_state *state) |
2360 | { | |
2361 | struct drm_i915_private *dev_priv = to_i915(state->base.dev); | |
2362 | struct intel_crtc *crtc; | |
2363 | ||
2364 | /* | |
2365 | * Add all pipes to the state, and force | |
2366 | * a modeset on all the active ones. | |
2367 | */ | |
2368 | for_each_intel_crtc(&dev_priv->drm, crtc) { | |
2369 | struct intel_crtc_state *crtc_state; | |
2370 | int ret; | |
2371 | ||
2372 | crtc_state = intel_atomic_get_crtc_state(&state->base, crtc); | |
2373 | if (IS_ERR(crtc_state)) | |
2374 | return PTR_ERR(crtc_state); | |
2375 | ||
1326a92c | 2376 | if (!crtc_state->hw.active || |
2225f3c6 | 2377 | drm_atomic_crtc_needs_modeset(&crtc_state->uapi)) |
fe4709a8 VS |
2378 | continue; |
2379 | ||
2225f3c6 | 2380 | crtc_state->uapi.mode_changed = true; |
fe4709a8 VS |
2381 | |
2382 | ret = drm_atomic_add_affected_connectors(&state->base, | |
2383 | &crtc->base); | |
2384 | if (ret) | |
2385 | return ret; | |
2386 | ||
2387 | ret = drm_atomic_add_affected_planes(&state->base, | |
2388 | &crtc->base); | |
2389 | if (ret) | |
2390 | return ret; | |
2391 | ||
2392 | crtc_state->update_planes |= crtc_state->active_planes; | |
2393 | } | |
2394 | ||
2395 | return 0; | |
2396 | } | |
2397 | ||
28a30b45 | 2398 | static int fixed_modeset_calc_cdclk(struct intel_cdclk_state *cdclk_state) |
3e30d708 VS |
2399 | { |
2400 | int min_cdclk; | |
2401 | ||
2402 | /* | |
2403 | * We can't change the cdclk frequency, but we still want to | |
2404 | * check that the required minimum frequency doesn't exceed | |
2405 | * the actual cdclk frequency. | |
2406 | */ | |
28a30b45 | 2407 | min_cdclk = intel_compute_min_cdclk(cdclk_state); |
3e30d708 VS |
2408 | if (min_cdclk < 0) |
2409 | return min_cdclk; | |
2410 | ||
2411 | return 0; | |
2412 | } | |
2413 | ||
28a30b45 VS |
2414 | static struct intel_global_state *intel_cdclk_duplicate_state(struct intel_global_obj *obj) |
2415 | { | |
2416 | struct intel_cdclk_state *cdclk_state; | |
2417 | ||
2418 | cdclk_state = kmemdup(obj->state, sizeof(*cdclk_state), GFP_KERNEL); | |
2419 | if (!cdclk_state) | |
2420 | return NULL; | |
2421 | ||
2422 | cdclk_state->force_min_cdclk_changed = false; | |
2423 | cdclk_state->pipe = INVALID_PIPE; | |
2424 | ||
2425 | return &cdclk_state->base; | |
2426 | } | |
2427 | ||
2428 | static void intel_cdclk_destroy_state(struct intel_global_obj *obj, | |
2429 | struct intel_global_state *state) | |
2430 | { | |
2431 | kfree(state); | |
2432 | } | |
2433 | ||
2434 | static const struct intel_global_state_funcs intel_cdclk_funcs = { | |
2435 | .atomic_duplicate_state = intel_cdclk_duplicate_state, | |
2436 | .atomic_destroy_state = intel_cdclk_destroy_state, | |
2437 | }; | |
2438 | ||
2439 | struct intel_cdclk_state * | |
2440 | intel_atomic_get_cdclk_state(struct intel_atomic_state *state) | |
2441 | { | |
2442 | struct drm_i915_private *dev_priv = to_i915(state->base.dev); | |
2443 | struct intel_global_state *cdclk_state; | |
2444 | ||
2445 | cdclk_state = intel_atomic_get_global_obj_state(state, &dev_priv->cdclk.obj); | |
2446 | if (IS_ERR(cdclk_state)) | |
2447 | return ERR_CAST(cdclk_state); | |
2448 | ||
2449 | return to_intel_cdclk_state(cdclk_state); | |
2450 | } | |
2451 | ||
2452 | int intel_cdclk_init(struct drm_i915_private *dev_priv) | |
2453 | { | |
2454 | struct intel_cdclk_state *cdclk_state; | |
2455 | ||
2456 | cdclk_state = kzalloc(sizeof(*cdclk_state), GFP_KERNEL); | |
2457 | if (!cdclk_state) | |
2458 | return -ENOMEM; | |
2459 | ||
2460 | intel_atomic_global_obj_init(dev_priv, &dev_priv->cdclk.obj, | |
2461 | &cdclk_state->base, &intel_cdclk_funcs); | |
2462 | ||
2463 | return 0; | |
2464 | } | |
2465 | ||
fe4709a8 VS |
2466 | int intel_modeset_calc_cdclk(struct intel_atomic_state *state) |
2467 | { | |
2468 | struct drm_i915_private *dev_priv = to_i915(state->base.dev); | |
28a30b45 VS |
2469 | const struct intel_cdclk_state *old_cdclk_state; |
2470 | struct intel_cdclk_state *new_cdclk_state; | |
fe4709a8 VS |
2471 | enum pipe pipe; |
2472 | int ret; | |
2473 | ||
28a30b45 VS |
2474 | new_cdclk_state = intel_atomic_get_cdclk_state(state); |
2475 | if (IS_ERR(new_cdclk_state)) | |
2476 | return PTR_ERR(new_cdclk_state); | |
54f09d23 | 2477 | |
28a30b45 | 2478 | old_cdclk_state = intel_atomic_get_old_cdclk_state(state); |
54f09d23 | 2479 | |
0c2d5512 VS |
2480 | new_cdclk_state->active_pipes = |
2481 | intel_calc_active_pipes(state, old_cdclk_state->active_pipes); | |
2482 | ||
28a30b45 | 2483 | ret = dev_priv->display.modeset_calc_cdclk(new_cdclk_state); |
fe4709a8 VS |
2484 | if (ret) |
2485 | return ret; | |
2486 | ||
1965de63 VS |
2487 | if (intel_cdclk_changed(&old_cdclk_state->actual, |
2488 | &new_cdclk_state->actual)) { | |
1d5a95b5 VS |
2489 | /* |
2490 | * Also serialize commits across all crtcs | |
2491 | * if the actual hw needs to be poked. | |
2492 | */ | |
28a30b45 | 2493 | ret = intel_atomic_serialize_global_state(&new_cdclk_state->base); |
1d5a95b5 VS |
2494 | if (ret) |
2495 | return ret; | |
0c2d5512 VS |
2496 | } else if (old_cdclk_state->active_pipes != new_cdclk_state->active_pipes || |
2497 | intel_cdclk_changed(&old_cdclk_state->logical, | |
1965de63 | 2498 | &new_cdclk_state->logical)) { |
28a30b45 | 2499 | ret = intel_atomic_lock_global_state(&new_cdclk_state->base); |
1d5a95b5 | 2500 | if (ret) |
fe4709a8 | 2501 | return ret; |
1d5a95b5 VS |
2502 | } else { |
2503 | return 0; | |
fe4709a8 VS |
2504 | } |
2505 | ||
0c2d5512 | 2506 | if (is_power_of_2(new_cdclk_state->active_pipes) && |
65c88a86 | 2507 | intel_cdclk_can_cd2x_update(dev_priv, |
1965de63 VS |
2508 | &old_cdclk_state->actual, |
2509 | &new_cdclk_state->actual)) { | |
fe4709a8 VS |
2510 | struct intel_crtc *crtc; |
2511 | struct intel_crtc_state *crtc_state; | |
2512 | ||
0c2d5512 | 2513 | pipe = ilog2(new_cdclk_state->active_pipes); |
fe4709a8 | 2514 | crtc = intel_get_crtc_for_pipe(dev_priv, pipe); |
1d5a95b5 VS |
2515 | |
2516 | crtc_state = intel_atomic_get_crtc_state(&state->base, crtc); | |
2517 | if (IS_ERR(crtc_state)) | |
2518 | return PTR_ERR(crtc_state); | |
2519 | ||
2225f3c6 | 2520 | if (drm_atomic_crtc_needs_modeset(&crtc_state->uapi)) |
fe4709a8 VS |
2521 | pipe = INVALID_PIPE; |
2522 | } else { | |
2523 | pipe = INVALID_PIPE; | |
2524 | } | |
2525 | ||
1d5a95b5 | 2526 | if (pipe != INVALID_PIPE) { |
1965de63 | 2527 | new_cdclk_state->pipe = pipe; |
6c066f4c | 2528 | |
23194610 WK |
2529 | drm_dbg_kms(&dev_priv->drm, |
2530 | "Can change cdclk with pipe %c active\n", | |
2531 | pipe_name(pipe)); | |
1965de63 VS |
2532 | } else if (intel_cdclk_needs_modeset(&old_cdclk_state->actual, |
2533 | &new_cdclk_state->actual)) { | |
1d5a95b5 | 2534 | /* All pipes must be switched off while we change the cdclk. */ |
fe4709a8 VS |
2535 | ret = intel_modeset_all_pipes(state); |
2536 | if (ret) | |
2537 | return ret; | |
2538 | ||
1965de63 | 2539 | new_cdclk_state->pipe = INVALID_PIPE; |
6c066f4c | 2540 | |
23194610 WK |
2541 | drm_dbg_kms(&dev_priv->drm, |
2542 | "Modeset required for cdclk change\n"); | |
fe4709a8 VS |
2543 | } |
2544 | ||
23194610 WK |
2545 | drm_dbg_kms(&dev_priv->drm, |
2546 | "New cdclk calculated to be logical %u kHz, actual %u kHz\n", | |
1965de63 VS |
2547 | new_cdclk_state->logical.cdclk, |
2548 | new_cdclk_state->actual.cdclk); | |
23194610 WK |
2549 | drm_dbg_kms(&dev_priv->drm, |
2550 | "New voltage level calculated to be logical %u, actual %u\n", | |
1965de63 VS |
2551 | new_cdclk_state->logical.voltage_level, |
2552 | new_cdclk_state->actual.voltage_level); | |
fe4709a8 VS |
2553 | |
2554 | return 0; | |
2555 | } | |
2556 | ||
7ff89ca2 VS |
2557 | static int intel_compute_max_dotclk(struct drm_i915_private *dev_priv) |
2558 | { | |
2559 | int max_cdclk_freq = dev_priv->max_cdclk_freq; | |
2560 | ||
42882336 | 2561 | if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv)) |
43037c86 | 2562 | return 2 * max_cdclk_freq; |
cf819eff | 2563 | else if (IS_GEN(dev_priv, 9) || |
d305e061 | 2564 | IS_BROADWELL(dev_priv) || IS_HASWELL(dev_priv)) |
7ff89ca2 VS |
2565 | return max_cdclk_freq; |
2566 | else if (IS_CHERRYVIEW(dev_priv)) | |
2567 | return max_cdclk_freq*95/100; | |
c56b89f1 | 2568 | else if (INTEL_GEN(dev_priv) < 4) |
7ff89ca2 VS |
2569 | return 2*max_cdclk_freq*90/100; |
2570 | else | |
2571 | return max_cdclk_freq*90/100; | |
2572 | } | |
2573 | ||
2574 | /** | |
2575 | * intel_update_max_cdclk - Determine the maximum support CDCLK frequency | |
2576 | * @dev_priv: i915 device | |
2577 | * | |
2578 | * Determine the maximum CDCLK frequency the platform supports, and also | |
2579 | * derive the maximum dot clock frequency the maximum CDCLK frequency | |
2580 | * allows. | |
2581 | */ | |
2582 | void intel_update_max_cdclk(struct drm_i915_private *dev_priv) | |
2583 | { | |
6e63790e JRS |
2584 | if (IS_ELKHARTLAKE(dev_priv)) { |
2585 | if (dev_priv->cdclk.hw.ref == 24000) | |
2586 | dev_priv->max_cdclk_freq = 552000; | |
2587 | else | |
2588 | dev_priv->max_cdclk_freq = 556800; | |
2589 | } else if (INTEL_GEN(dev_priv) >= 11) { | |
186a277e PZ |
2590 | if (dev_priv->cdclk.hw.ref == 24000) |
2591 | dev_priv->max_cdclk_freq = 648000; | |
2592 | else | |
2593 | dev_priv->max_cdclk_freq = 652800; | |
2594 | } else if (IS_CANNONLAKE(dev_priv)) { | |
d1999e9e RV |
2595 | dev_priv->max_cdclk_freq = 528000; |
2596 | } else if (IS_GEN9_BC(dev_priv)) { | |
3e9f55df | 2597 | u32 limit = intel_de_read(dev_priv, SKL_DFSM) & SKL_DFSM_CDCLK_LIMIT_MASK; |
7ff89ca2 VS |
2598 | int max_cdclk, vco; |
2599 | ||
2600 | vco = dev_priv->skl_preferred_vco_freq; | |
aff35110 | 2601 | drm_WARN_ON(&dev_priv->drm, vco != 8100000 && vco != 8640000); |
7ff89ca2 VS |
2602 | |
2603 | /* | |
2604 | * Use the lower (vco 8640) cdclk values as a | |
2605 | * first guess. skl_calc_cdclk() will correct it | |
2606 | * if the preferred vco is 8100 instead. | |
2607 | */ | |
2608 | if (limit == SKL_DFSM_CDCLK_LIMIT_675) | |
2609 | max_cdclk = 617143; | |
2610 | else if (limit == SKL_DFSM_CDCLK_LIMIT_540) | |
2611 | max_cdclk = 540000; | |
2612 | else if (limit == SKL_DFSM_CDCLK_LIMIT_450) | |
2613 | max_cdclk = 432000; | |
2614 | else | |
2615 | max_cdclk = 308571; | |
2616 | ||
2617 | dev_priv->max_cdclk_freq = skl_calc_cdclk(max_cdclk, vco); | |
2618 | } else if (IS_GEMINILAKE(dev_priv)) { | |
2619 | dev_priv->max_cdclk_freq = 316800; | |
2620 | } else if (IS_BROXTON(dev_priv)) { | |
2621 | dev_priv->max_cdclk_freq = 624000; | |
2622 | } else if (IS_BROADWELL(dev_priv)) { | |
2623 | /* | |
2624 | * FIXME with extra cooling we can allow | |
2625 | * 540 MHz for ULX and 675 Mhz for ULT. | |
2626 | * How can we know if extra cooling is | |
2627 | * available? PCI ID, VTB, something else? | |
2628 | */ | |
3e9f55df | 2629 | if (intel_de_read(dev_priv, FUSE_STRAP) & HSW_CDCLK_LIMIT) |
7ff89ca2 VS |
2630 | dev_priv->max_cdclk_freq = 450000; |
2631 | else if (IS_BDW_ULX(dev_priv)) | |
2632 | dev_priv->max_cdclk_freq = 450000; | |
2633 | else if (IS_BDW_ULT(dev_priv)) | |
2634 | dev_priv->max_cdclk_freq = 540000; | |
2635 | else | |
2636 | dev_priv->max_cdclk_freq = 675000; | |
2637 | } else if (IS_CHERRYVIEW(dev_priv)) { | |
2638 | dev_priv->max_cdclk_freq = 320000; | |
2639 | } else if (IS_VALLEYVIEW(dev_priv)) { | |
2640 | dev_priv->max_cdclk_freq = 400000; | |
2641 | } else { | |
2642 | /* otherwise assume cdclk is fixed */ | |
49cd97a3 | 2643 | dev_priv->max_cdclk_freq = dev_priv->cdclk.hw.cdclk; |
7ff89ca2 VS |
2644 | } |
2645 | ||
2646 | dev_priv->max_dotclk_freq = intel_compute_max_dotclk(dev_priv); | |
2647 | ||
23194610 WK |
2648 | drm_dbg(&dev_priv->drm, "Max CD clock rate: %d kHz\n", |
2649 | dev_priv->max_cdclk_freq); | |
7ff89ca2 | 2650 | |
23194610 WK |
2651 | drm_dbg(&dev_priv->drm, "Max dotclock rate: %d kHz\n", |
2652 | dev_priv->max_dotclk_freq); | |
7ff89ca2 VS |
2653 | } |
2654 | ||
2655 | /** | |
2656 | * intel_update_cdclk - Determine the current CDCLK frequency | |
2657 | * @dev_priv: i915 device | |
2658 | * | |
2659 | * Determine the current CDCLK frequency. | |
2660 | */ | |
2661 | void intel_update_cdclk(struct drm_i915_private *dev_priv) | |
2662 | { | |
49cd97a3 | 2663 | dev_priv->display.get_cdclk(dev_priv, &dev_priv->cdclk.hw); |
7ff89ca2 | 2664 | |
7ff89ca2 VS |
2665 | /* |
2666 | * 9:0 CMBUS [sic] CDCLK frequency (cdfreq): | |
2667 | * Programmng [sic] note: bit[9:2] should be programmed to the number | |
2668 | * of cdclk that generates 4MHz reference clock freq which is used to | |
2669 | * generate GMBus clock. This will vary with the cdclk freq. | |
2670 | */ | |
2671 | if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) | |
3e9f55df JN |
2672 | intel_de_write(dev_priv, GMBUSFREQ_VLV, |
2673 | DIV_ROUND_UP(dev_priv->cdclk.hw.cdclk, 1000)); | |
7ff89ca2 VS |
2674 | } |
2675 | ||
9d81a997 RV |
2676 | static int cnp_rawclk(struct drm_i915_private *dev_priv) |
2677 | { | |
2678 | u32 rawclk; | |
2679 | int divider, fraction; | |
2680 | ||
3e9f55df | 2681 | if (intel_de_read(dev_priv, SFUSE_STRAP) & SFUSE_STRAP_RAW_FREQUENCY) { |
9d81a997 RV |
2682 | /* 24 MHz */ |
2683 | divider = 24000; | |
2684 | fraction = 0; | |
2685 | } else { | |
2686 | /* 19.2 MHz */ | |
2687 | divider = 19000; | |
2688 | fraction = 200; | |
2689 | } | |
2690 | ||
af4de6ad | 2691 | rawclk = CNP_RAWCLK_DIV(divider / 1000); |
704e504b PZ |
2692 | if (fraction) { |
2693 | int numerator = 1; | |
9d81a997 | 2694 | |
704e504b PZ |
2695 | rawclk |= CNP_RAWCLK_DEN(DIV_ROUND_CLOSEST(numerator * 1000, |
2696 | fraction) - 1); | |
29b43ae2 | 2697 | if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP) |
704e504b | 2698 | rawclk |= ICP_RAWCLK_NUM(numerator); |
4ef99abd AS |
2699 | } |
2700 | ||
3e9f55df | 2701 | intel_de_write(dev_priv, PCH_RAWCLK_FREQ, rawclk); |
704e504b | 2702 | return divider + fraction; |
4ef99abd AS |
2703 | } |
2704 | ||
7ff89ca2 VS |
2705 | static int pch_rawclk(struct drm_i915_private *dev_priv) |
2706 | { | |
3e9f55df | 2707 | return (intel_de_read(dev_priv, PCH_RAWCLK_FREQ) & RAWCLK_FREQ_MASK) * 1000; |
7ff89ca2 VS |
2708 | } |
2709 | ||
2710 | static int vlv_hrawclk(struct drm_i915_private *dev_priv) | |
2711 | { | |
2712 | /* RAWCLK_FREQ_VLV register updated from power well code */ | |
2713 | return vlv_get_cck_clock_hpll(dev_priv, "hrawclk", | |
2714 | CCK_DISPLAY_REF_CLOCK_CONTROL); | |
2715 | } | |
2716 | ||
488e0179 | 2717 | static int i9xx_hrawclk(struct drm_i915_private *dev_priv) |
7ff89ca2 | 2718 | { |
cbe974fb | 2719 | u32 clkcfg; |
7ff89ca2 | 2720 | |
42ab3305 VS |
2721 | /* |
2722 | * hrawclock is 1/4 the FSB frequency | |
2723 | * | |
2724 | * Note that this only reads the state of the FSB | |
2725 | * straps, not the actual FSB frequency. Some BIOSen | |
2726 | * let you configure each independently. Ideally we'd | |
2727 | * read out the actual FSB frequency but sadly we | |
2728 | * don't know which registers have that information, | |
2729 | * and all the relevant docs have gone to bit heaven :( | |
2730 | */ | |
6f62bda1 VS |
2731 | clkcfg = intel_de_read(dev_priv, CLKCFG) & CLKCFG_FSB_MASK; |
2732 | ||
488e0179 VS |
2733 | if (IS_MOBILE(dev_priv)) { |
2734 | switch (clkcfg) { | |
2735 | case CLKCFG_FSB_400: | |
2736 | return 100000; | |
2737 | case CLKCFG_FSB_533: | |
2738 | return 133333; | |
2739 | case CLKCFG_FSB_667: | |
2740 | return 166667; | |
2741 | case CLKCFG_FSB_800: | |
2742 | return 200000; | |
2743 | case CLKCFG_FSB_1067: | |
2744 | return 266667; | |
2745 | case CLKCFG_FSB_1333: | |
2746 | return 333333; | |
2747 | default: | |
2748 | MISSING_CASE(clkcfg); | |
2749 | return 133333; | |
2750 | } | |
2751 | } else { | |
2752 | switch (clkcfg) { | |
2753 | case CLKCFG_FSB_400_ALT: | |
2754 | return 100000; | |
2755 | case CLKCFG_FSB_533: | |
2756 | return 133333; | |
2757 | case CLKCFG_FSB_667: | |
2758 | return 166667; | |
2759 | case CLKCFG_FSB_800: | |
2760 | return 200000; | |
2761 | case CLKCFG_FSB_1067_ALT: | |
2762 | return 266667; | |
2763 | case CLKCFG_FSB_1333_ALT: | |
2764 | return 333333; | |
2765 | case CLKCFG_FSB_1600_ALT: | |
2766 | return 400000; | |
2767 | default: | |
2768 | return 133333; | |
2769 | } | |
7ff89ca2 VS |
2770 | } |
2771 | } | |
2772 | ||
2773 | /** | |
b04002f4 | 2774 | * intel_read_rawclk - Determine the current RAWCLK frequency |
7ff89ca2 VS |
2775 | * @dev_priv: i915 device |
2776 | * | |
2777 | * Determine the current RAWCLK frequency. RAWCLK is a fixed | |
2778 | * frequency clock so this needs to done only once. | |
2779 | */ | |
b04002f4 | 2780 | u32 intel_read_rawclk(struct drm_i915_private *dev_priv) |
7ff89ca2 | 2781 | { |
b04002f4 CW |
2782 | u32 freq; |
2783 | ||
c6c30b91 | 2784 | if (INTEL_PCH_TYPE(dev_priv) >= PCH_CNP) |
b04002f4 | 2785 | freq = cnp_rawclk(dev_priv); |
9d81a997 | 2786 | else if (HAS_PCH_SPLIT(dev_priv)) |
b04002f4 | 2787 | freq = pch_rawclk(dev_priv); |
7ff89ca2 | 2788 | else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) |
b04002f4 | 2789 | freq = vlv_hrawclk(dev_priv); |
488e0179 VS |
2790 | else if (INTEL_GEN(dev_priv) >= 3) |
2791 | freq = i9xx_hrawclk(dev_priv); | |
7ff89ca2 VS |
2792 | else |
2793 | /* no rawclk on other platforms, or no need to know it */ | |
b04002f4 | 2794 | return 0; |
7ff89ca2 | 2795 | |
b04002f4 | 2796 | return freq; |
7ff89ca2 VS |
2797 | } |
2798 | ||
2799 | /** | |
2800 | * intel_init_cdclk_hooks - Initialize CDCLK related modesetting hooks | |
2801 | * @dev_priv: i915 device | |
2802 | */ | |
2803 | void intel_init_cdclk_hooks(struct drm_i915_private *dev_priv) | |
2804 | { | |
0fde0b1d MR |
2805 | if (INTEL_GEN(dev_priv) >= 12) { |
2806 | dev_priv->display.set_cdclk = bxt_set_cdclk; | |
cd191546 | 2807 | dev_priv->display.bw_calc_min_cdclk = skl_bw_calc_min_cdclk; |
0fde0b1d MR |
2808 | dev_priv->display.modeset_calc_cdclk = bxt_modeset_calc_cdclk; |
2809 | dev_priv->display.calc_voltage_level = tgl_calc_voltage_level; | |
2810 | dev_priv->cdclk.table = icl_cdclk_table; | |
2811 | } else if (IS_ELKHARTLAKE(dev_priv)) { | |
d2f429eb | 2812 | dev_priv->display.set_cdclk = bxt_set_cdclk; |
cd191546 | 2813 | dev_priv->display.bw_calc_min_cdclk = skl_bw_calc_min_cdclk; |
933122cc | 2814 | dev_priv->display.modeset_calc_cdclk = bxt_modeset_calc_cdclk; |
d2f429eb MR |
2815 | dev_priv->display.calc_voltage_level = ehl_calc_voltage_level; |
2816 | dev_priv->cdclk.table = icl_cdclk_table; | |
2817 | } else if (INTEL_GEN(dev_priv) >= 11) { | |
1cbcd3b4 | 2818 | dev_priv->display.set_cdclk = bxt_set_cdclk; |
cd191546 | 2819 | dev_priv->display.bw_calc_min_cdclk = skl_bw_calc_min_cdclk; |
933122cc | 2820 | dev_priv->display.modeset_calc_cdclk = bxt_modeset_calc_cdclk; |
d2f429eb | 2821 | dev_priv->display.calc_voltage_level = icl_calc_voltage_level; |
736da811 | 2822 | dev_priv->cdclk.table = icl_cdclk_table; |
993298af | 2823 | } else if (IS_CANNONLAKE(dev_priv)) { |
cd191546 | 2824 | dev_priv->display.bw_calc_min_cdclk = skl_bw_calc_min_cdclk; |
1cbcd3b4 | 2825 | dev_priv->display.set_cdclk = bxt_set_cdclk; |
933122cc | 2826 | dev_priv->display.modeset_calc_cdclk = bxt_modeset_calc_cdclk; |
d2f429eb | 2827 | dev_priv->display.calc_voltage_level = cnl_calc_voltage_level; |
736da811 | 2828 | dev_priv->cdclk.table = cnl_cdclk_table; |
7ff89ca2 | 2829 | } else if (IS_GEN9_LP(dev_priv)) { |
cd191546 | 2830 | dev_priv->display.bw_calc_min_cdclk = skl_bw_calc_min_cdclk; |
b0587e4d | 2831 | dev_priv->display.set_cdclk = bxt_set_cdclk; |
3d51b48f | 2832 | dev_priv->display.modeset_calc_cdclk = bxt_modeset_calc_cdclk; |
d2f429eb | 2833 | dev_priv->display.calc_voltage_level = bxt_calc_voltage_level; |
43ed2275 CW |
2834 | if (IS_GEMINILAKE(dev_priv)) |
2835 | dev_priv->cdclk.table = glk_cdclk_table; | |
2836 | else | |
2837 | dev_priv->cdclk.table = bxt_cdclk_table; | |
7ff89ca2 | 2838 | } else if (IS_GEN9_BC(dev_priv)) { |
cd191546 | 2839 | dev_priv->display.bw_calc_min_cdclk = skl_bw_calc_min_cdclk; |
b0587e4d | 2840 | dev_priv->display.set_cdclk = skl_set_cdclk; |
3d51b48f | 2841 | dev_priv->display.modeset_calc_cdclk = skl_modeset_calc_cdclk; |
993298af | 2842 | } else if (IS_BROADWELL(dev_priv)) { |
cd191546 | 2843 | dev_priv->display.bw_calc_min_cdclk = intel_bw_calc_min_cdclk; |
993298af | 2844 | dev_priv->display.set_cdclk = bdw_set_cdclk; |
3d51b48f | 2845 | dev_priv->display.modeset_calc_cdclk = bdw_modeset_calc_cdclk; |
993298af | 2846 | } else if (IS_CHERRYVIEW(dev_priv)) { |
cd191546 | 2847 | dev_priv->display.bw_calc_min_cdclk = intel_bw_calc_min_cdclk; |
993298af | 2848 | dev_priv->display.set_cdclk = chv_set_cdclk; |
3d51b48f | 2849 | dev_priv->display.modeset_calc_cdclk = vlv_modeset_calc_cdclk; |
993298af | 2850 | } else if (IS_VALLEYVIEW(dev_priv)) { |
cd191546 | 2851 | dev_priv->display.bw_calc_min_cdclk = intel_bw_calc_min_cdclk; |
993298af | 2852 | dev_priv->display.set_cdclk = vlv_set_cdclk; |
3d51b48f | 2853 | dev_priv->display.modeset_calc_cdclk = vlv_modeset_calc_cdclk; |
3e30d708 | 2854 | } else { |
cd191546 | 2855 | dev_priv->display.bw_calc_min_cdclk = intel_bw_calc_min_cdclk; |
3e30d708 | 2856 | dev_priv->display.modeset_calc_cdclk = fixed_modeset_calc_cdclk; |
7ff89ca2 VS |
2857 | } |
2858 | ||
71dc367e | 2859 | if (INTEL_GEN(dev_priv) >= 10 || IS_GEN9_LP(dev_priv)) |
7ff89ca2 | 2860 | dev_priv->display.get_cdclk = bxt_get_cdclk; |
993298af RV |
2861 | else if (IS_GEN9_BC(dev_priv)) |
2862 | dev_priv->display.get_cdclk = skl_get_cdclk; | |
7ff89ca2 VS |
2863 | else if (IS_BROADWELL(dev_priv)) |
2864 | dev_priv->display.get_cdclk = bdw_get_cdclk; | |
2865 | else if (IS_HASWELL(dev_priv)) | |
2866 | dev_priv->display.get_cdclk = hsw_get_cdclk; | |
2867 | else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) | |
2868 | dev_priv->display.get_cdclk = vlv_get_cdclk; | |
cf819eff | 2869 | else if (IS_GEN(dev_priv, 6) || IS_IVYBRIDGE(dev_priv)) |
7ff89ca2 | 2870 | dev_priv->display.get_cdclk = fixed_400mhz_get_cdclk; |
cf819eff | 2871 | else if (IS_GEN(dev_priv, 5)) |
7ff89ca2 VS |
2872 | dev_priv->display.get_cdclk = fixed_450mhz_get_cdclk; |
2873 | else if (IS_GM45(dev_priv)) | |
2874 | dev_priv->display.get_cdclk = gm45_get_cdclk; | |
6b9e441d | 2875 | else if (IS_G45(dev_priv)) |
7ff89ca2 VS |
2876 | dev_priv->display.get_cdclk = g33_get_cdclk; |
2877 | else if (IS_I965GM(dev_priv)) | |
2878 | dev_priv->display.get_cdclk = i965gm_get_cdclk; | |
2879 | else if (IS_I965G(dev_priv)) | |
2880 | dev_priv->display.get_cdclk = fixed_400mhz_get_cdclk; | |
2881 | else if (IS_PINEVIEW(dev_priv)) | |
2882 | dev_priv->display.get_cdclk = pnv_get_cdclk; | |
2883 | else if (IS_G33(dev_priv)) | |
2884 | dev_priv->display.get_cdclk = g33_get_cdclk; | |
2885 | else if (IS_I945GM(dev_priv)) | |
2886 | dev_priv->display.get_cdclk = i945gm_get_cdclk; | |
2887 | else if (IS_I945G(dev_priv)) | |
2888 | dev_priv->display.get_cdclk = fixed_400mhz_get_cdclk; | |
2889 | else if (IS_I915GM(dev_priv)) | |
2890 | dev_priv->display.get_cdclk = i915gm_get_cdclk; | |
2891 | else if (IS_I915G(dev_priv)) | |
2892 | dev_priv->display.get_cdclk = fixed_333mhz_get_cdclk; | |
2893 | else if (IS_I865G(dev_priv)) | |
2894 | dev_priv->display.get_cdclk = fixed_266mhz_get_cdclk; | |
2895 | else if (IS_I85X(dev_priv)) | |
2896 | dev_priv->display.get_cdclk = i85x_get_cdclk; | |
2897 | else if (IS_I845G(dev_priv)) | |
2898 | dev_priv->display.get_cdclk = fixed_200mhz_get_cdclk; | |
2899 | else { /* 830 */ | |
aff35110 PB |
2900 | drm_WARN(&dev_priv->drm, !IS_I830(dev_priv), |
2901 | "Unknown platform. Assuming 133 MHz CDCLK\n"); | |
7ff89ca2 VS |
2902 | dev_priv->display.get_cdclk = fixed_133mhz_get_cdclk; |
2903 | } | |
2904 | } |