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9c065a7d DV |
1 | /* |
2 | * Copyright © 2012-2014 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 DEALINGS | |
21 | * IN THE SOFTWARE. | |
22 | * | |
23 | * Authors: | |
24 | * Eugeni Dodonov <eugeni.dodonov@intel.com> | |
25 | * Daniel Vetter <daniel.vetter@ffwll.ch> | |
26 | * | |
27 | */ | |
28 | ||
29 | #include <linux/pm_runtime.h> | |
30 | #include <linux/vgaarb.h> | |
31 | ||
32 | #include "i915_drv.h" | |
33 | #include "intel_drv.h" | |
9c065a7d | 34 | |
e4e7684f DV |
35 | /** |
36 | * DOC: runtime pm | |
37 | * | |
38 | * The i915 driver supports dynamic enabling and disabling of entire hardware | |
39 | * blocks at runtime. This is especially important on the display side where | |
40 | * software is supposed to control many power gates manually on recent hardware, | |
41 | * since on the GT side a lot of the power management is done by the hardware. | |
42 | * But even there some manual control at the device level is required. | |
43 | * | |
44 | * Since i915 supports a diverse set of platforms with a unified codebase and | |
45 | * hardware engineers just love to shuffle functionality around between power | |
46 | * domains there's a sizeable amount of indirection required. This file provides | |
47 | * generic functions to the driver for grabbing and releasing references for | |
48 | * abstract power domains. It then maps those to the actual power wells | |
49 | * present for a given platform. | |
50 | */ | |
51 | ||
f75a1985 SS |
52 | #define GEN9_ENABLE_DC5(dev) 0 |
53 | #define SKL_ENABLE_DC6(dev) IS_SKYLAKE(dev) | |
dc174300 | 54 | |
9c065a7d DV |
55 | #define for_each_power_well(i, power_well, domain_mask, power_domains) \ |
56 | for (i = 0; \ | |
57 | i < (power_domains)->power_well_count && \ | |
58 | ((power_well) = &(power_domains)->power_wells[i]); \ | |
59 | i++) \ | |
60 | if ((power_well)->domains & (domain_mask)) | |
61 | ||
62 | #define for_each_power_well_rev(i, power_well, domain_mask, power_domains) \ | |
63 | for (i = (power_domains)->power_well_count - 1; \ | |
64 | i >= 0 && ((power_well) = &(power_domains)->power_wells[i]);\ | |
65 | i--) \ | |
66 | if ((power_well)->domains & (domain_mask)) | |
67 | ||
5aefb239 SS |
68 | bool intel_display_power_well_is_enabled(struct drm_i915_private *dev_priv, |
69 | int power_well_id); | |
70 | ||
e8ca9320 DL |
71 | static void intel_power_well_enable(struct drm_i915_private *dev_priv, |
72 | struct i915_power_well *power_well) | |
73 | { | |
74 | DRM_DEBUG_KMS("enabling %s\n", power_well->name); | |
75 | power_well->ops->enable(dev_priv, power_well); | |
76 | power_well->hw_enabled = true; | |
77 | } | |
78 | ||
dcddab3a DL |
79 | static void intel_power_well_disable(struct drm_i915_private *dev_priv, |
80 | struct i915_power_well *power_well) | |
81 | { | |
82 | DRM_DEBUG_KMS("disabling %s\n", power_well->name); | |
83 | power_well->hw_enabled = false; | |
84 | power_well->ops->disable(dev_priv, power_well); | |
85 | } | |
86 | ||
e4e7684f | 87 | /* |
9c065a7d DV |
88 | * We should only use the power well if we explicitly asked the hardware to |
89 | * enable it, so check if it's enabled and also check if we've requested it to | |
90 | * be enabled. | |
91 | */ | |
92 | static bool hsw_power_well_enabled(struct drm_i915_private *dev_priv, | |
93 | struct i915_power_well *power_well) | |
94 | { | |
95 | return I915_READ(HSW_PWR_WELL_DRIVER) == | |
96 | (HSW_PWR_WELL_ENABLE_REQUEST | HSW_PWR_WELL_STATE_ENABLED); | |
97 | } | |
98 | ||
e4e7684f DV |
99 | /** |
100 | * __intel_display_power_is_enabled - unlocked check for a power domain | |
101 | * @dev_priv: i915 device instance | |
102 | * @domain: power domain to check | |
103 | * | |
104 | * This is the unlocked version of intel_display_power_is_enabled() and should | |
105 | * only be used from error capture and recovery code where deadlocks are | |
106 | * possible. | |
107 | * | |
108 | * Returns: | |
109 | * True when the power domain is enabled, false otherwise. | |
110 | */ | |
f458ebbc DV |
111 | bool __intel_display_power_is_enabled(struct drm_i915_private *dev_priv, |
112 | enum intel_display_power_domain domain) | |
9c065a7d DV |
113 | { |
114 | struct i915_power_domains *power_domains; | |
115 | struct i915_power_well *power_well; | |
116 | bool is_enabled; | |
117 | int i; | |
118 | ||
119 | if (dev_priv->pm.suspended) | |
120 | return false; | |
121 | ||
122 | power_domains = &dev_priv->power_domains; | |
123 | ||
124 | is_enabled = true; | |
125 | ||
126 | for_each_power_well_rev(i, power_well, BIT(domain), power_domains) { | |
127 | if (power_well->always_on) | |
128 | continue; | |
129 | ||
130 | if (!power_well->hw_enabled) { | |
131 | is_enabled = false; | |
132 | break; | |
133 | } | |
134 | } | |
135 | ||
136 | return is_enabled; | |
137 | } | |
138 | ||
e4e7684f | 139 | /** |
f61ccae3 | 140 | * intel_display_power_is_enabled - check for a power domain |
e4e7684f DV |
141 | * @dev_priv: i915 device instance |
142 | * @domain: power domain to check | |
143 | * | |
144 | * This function can be used to check the hw power domain state. It is mostly | |
145 | * used in hardware state readout functions. Everywhere else code should rely | |
146 | * upon explicit power domain reference counting to ensure that the hardware | |
147 | * block is powered up before accessing it. | |
148 | * | |
149 | * Callers must hold the relevant modesetting locks to ensure that concurrent | |
150 | * threads can't disable the power well while the caller tries to read a few | |
151 | * registers. | |
152 | * | |
153 | * Returns: | |
154 | * True when the power domain is enabled, false otherwise. | |
155 | */ | |
f458ebbc DV |
156 | bool intel_display_power_is_enabled(struct drm_i915_private *dev_priv, |
157 | enum intel_display_power_domain domain) | |
9c065a7d DV |
158 | { |
159 | struct i915_power_domains *power_domains; | |
160 | bool ret; | |
161 | ||
162 | power_domains = &dev_priv->power_domains; | |
163 | ||
164 | mutex_lock(&power_domains->lock); | |
f458ebbc | 165 | ret = __intel_display_power_is_enabled(dev_priv, domain); |
9c065a7d DV |
166 | mutex_unlock(&power_domains->lock); |
167 | ||
168 | return ret; | |
169 | } | |
170 | ||
e4e7684f DV |
171 | /** |
172 | * intel_display_set_init_power - set the initial power domain state | |
173 | * @dev_priv: i915 device instance | |
174 | * @enable: whether to enable or disable the initial power domain state | |
175 | * | |
176 | * For simplicity our driver load/unload and system suspend/resume code assumes | |
177 | * that all power domains are always enabled. This functions controls the state | |
178 | * of this little hack. While the initial power domain state is enabled runtime | |
179 | * pm is effectively disabled. | |
180 | */ | |
d9bc89d9 DV |
181 | void intel_display_set_init_power(struct drm_i915_private *dev_priv, |
182 | bool enable) | |
183 | { | |
184 | if (dev_priv->power_domains.init_power_on == enable) | |
185 | return; | |
186 | ||
187 | if (enable) | |
188 | intel_display_power_get(dev_priv, POWER_DOMAIN_INIT); | |
189 | else | |
190 | intel_display_power_put(dev_priv, POWER_DOMAIN_INIT); | |
191 | ||
192 | dev_priv->power_domains.init_power_on = enable; | |
193 | } | |
194 | ||
9c065a7d DV |
195 | /* |
196 | * Starting with Haswell, we have a "Power Down Well" that can be turned off | |
197 | * when not needed anymore. We have 4 registers that can request the power well | |
198 | * to be enabled, and it will only be disabled if none of the registers is | |
199 | * requesting it to be enabled. | |
200 | */ | |
201 | static void hsw_power_well_post_enable(struct drm_i915_private *dev_priv) | |
202 | { | |
203 | struct drm_device *dev = dev_priv->dev; | |
204 | ||
205 | /* | |
206 | * After we re-enable the power well, if we touch VGA register 0x3d5 | |
207 | * we'll get unclaimed register interrupts. This stops after we write | |
208 | * anything to the VGA MSR register. The vgacon module uses this | |
209 | * register all the time, so if we unbind our driver and, as a | |
210 | * consequence, bind vgacon, we'll get stuck in an infinite loop at | |
211 | * console_unlock(). So make here we touch the VGA MSR register, making | |
212 | * sure vgacon can keep working normally without triggering interrupts | |
213 | * and error messages. | |
214 | */ | |
215 | vga_get_uninterruptible(dev->pdev, VGA_RSRC_LEGACY_IO); | |
216 | outb(inb(VGA_MSR_READ), VGA_MSR_WRITE); | |
217 | vga_put(dev->pdev, VGA_RSRC_LEGACY_IO); | |
218 | ||
25400392 | 219 | if (IS_BROADWELL(dev)) |
4c6c03be DL |
220 | gen8_irq_power_well_post_enable(dev_priv, |
221 | 1 << PIPE_C | 1 << PIPE_B); | |
9c065a7d DV |
222 | } |
223 | ||
d14c0343 DL |
224 | static void skl_power_well_post_enable(struct drm_i915_private *dev_priv, |
225 | struct i915_power_well *power_well) | |
226 | { | |
227 | struct drm_device *dev = dev_priv->dev; | |
228 | ||
229 | /* | |
230 | * After we re-enable the power well, if we touch VGA register 0x3d5 | |
231 | * we'll get unclaimed register interrupts. This stops after we write | |
232 | * anything to the VGA MSR register. The vgacon module uses this | |
233 | * register all the time, so if we unbind our driver and, as a | |
234 | * consequence, bind vgacon, we'll get stuck in an infinite loop at | |
235 | * console_unlock(). So make here we touch the VGA MSR register, making | |
236 | * sure vgacon can keep working normally without triggering interrupts | |
237 | * and error messages. | |
238 | */ | |
239 | if (power_well->data == SKL_DISP_PW_2) { | |
240 | vga_get_uninterruptible(dev->pdev, VGA_RSRC_LEGACY_IO); | |
241 | outb(inb(VGA_MSR_READ), VGA_MSR_WRITE); | |
242 | vga_put(dev->pdev, VGA_RSRC_LEGACY_IO); | |
243 | ||
244 | gen8_irq_power_well_post_enable(dev_priv, | |
245 | 1 << PIPE_C | 1 << PIPE_B); | |
246 | } | |
247 | ||
1d2b9526 DL |
248 | if (power_well->data == SKL_DISP_PW_1) { |
249 | intel_prepare_ddi(dev); | |
d14c0343 | 250 | gen8_irq_power_well_post_enable(dev_priv, 1 << PIPE_A); |
1d2b9526 | 251 | } |
d14c0343 DL |
252 | } |
253 | ||
9c065a7d DV |
254 | static void hsw_set_power_well(struct drm_i915_private *dev_priv, |
255 | struct i915_power_well *power_well, bool enable) | |
256 | { | |
257 | bool is_enabled, enable_requested; | |
258 | uint32_t tmp; | |
259 | ||
260 | tmp = I915_READ(HSW_PWR_WELL_DRIVER); | |
261 | is_enabled = tmp & HSW_PWR_WELL_STATE_ENABLED; | |
262 | enable_requested = tmp & HSW_PWR_WELL_ENABLE_REQUEST; | |
263 | ||
264 | if (enable) { | |
265 | if (!enable_requested) | |
266 | I915_WRITE(HSW_PWR_WELL_DRIVER, | |
267 | HSW_PWR_WELL_ENABLE_REQUEST); | |
268 | ||
269 | if (!is_enabled) { | |
270 | DRM_DEBUG_KMS("Enabling power well\n"); | |
271 | if (wait_for((I915_READ(HSW_PWR_WELL_DRIVER) & | |
272 | HSW_PWR_WELL_STATE_ENABLED), 20)) | |
273 | DRM_ERROR("Timeout enabling power well\n"); | |
6d729bff | 274 | hsw_power_well_post_enable(dev_priv); |
9c065a7d DV |
275 | } |
276 | ||
9c065a7d DV |
277 | } else { |
278 | if (enable_requested) { | |
279 | I915_WRITE(HSW_PWR_WELL_DRIVER, 0); | |
280 | POSTING_READ(HSW_PWR_WELL_DRIVER); | |
281 | DRM_DEBUG_KMS("Requesting to disable the power well\n"); | |
282 | } | |
283 | } | |
284 | } | |
285 | ||
94dd5138 S |
286 | #define SKL_DISPLAY_POWERWELL_2_POWER_DOMAINS ( \ |
287 | BIT(POWER_DOMAIN_TRANSCODER_A) | \ | |
288 | BIT(POWER_DOMAIN_PIPE_B) | \ | |
289 | BIT(POWER_DOMAIN_TRANSCODER_B) | \ | |
290 | BIT(POWER_DOMAIN_PIPE_C) | \ | |
291 | BIT(POWER_DOMAIN_TRANSCODER_C) | \ | |
292 | BIT(POWER_DOMAIN_PIPE_B_PANEL_FITTER) | \ | |
293 | BIT(POWER_DOMAIN_PIPE_C_PANEL_FITTER) | \ | |
294 | BIT(POWER_DOMAIN_PORT_DDI_B_2_LANES) | \ | |
295 | BIT(POWER_DOMAIN_PORT_DDI_B_4_LANES) | \ | |
296 | BIT(POWER_DOMAIN_PORT_DDI_C_2_LANES) | \ | |
297 | BIT(POWER_DOMAIN_PORT_DDI_C_4_LANES) | \ | |
298 | BIT(POWER_DOMAIN_PORT_DDI_D_2_LANES) | \ | |
299 | BIT(POWER_DOMAIN_PORT_DDI_D_4_LANES) | \ | |
d8e19f99 | 300 | BIT(POWER_DOMAIN_PORT_DDI_E_2_LANES) | \ |
94dd5138 S |
301 | BIT(POWER_DOMAIN_AUX_B) | \ |
302 | BIT(POWER_DOMAIN_AUX_C) | \ | |
303 | BIT(POWER_DOMAIN_AUX_D) | \ | |
304 | BIT(POWER_DOMAIN_AUDIO) | \ | |
305 | BIT(POWER_DOMAIN_VGA) | \ | |
306 | BIT(POWER_DOMAIN_INIT)) | |
307 | #define SKL_DISPLAY_POWERWELL_1_POWER_DOMAINS ( \ | |
308 | SKL_DISPLAY_POWERWELL_2_POWER_DOMAINS | \ | |
309 | BIT(POWER_DOMAIN_PLLS) | \ | |
310 | BIT(POWER_DOMAIN_PIPE_A) | \ | |
311 | BIT(POWER_DOMAIN_TRANSCODER_EDP) | \ | |
312 | BIT(POWER_DOMAIN_PIPE_A_PANEL_FITTER) | \ | |
313 | BIT(POWER_DOMAIN_PORT_DDI_A_2_LANES) | \ | |
314 | BIT(POWER_DOMAIN_PORT_DDI_A_4_LANES) | \ | |
315 | BIT(POWER_DOMAIN_AUX_A) | \ | |
316 | BIT(POWER_DOMAIN_INIT)) | |
317 | #define SKL_DISPLAY_DDI_A_E_POWER_DOMAINS ( \ | |
318 | BIT(POWER_DOMAIN_PORT_DDI_A_2_LANES) | \ | |
319 | BIT(POWER_DOMAIN_PORT_DDI_A_4_LANES) | \ | |
d8e19f99 | 320 | BIT(POWER_DOMAIN_PORT_DDI_E_2_LANES) | \ |
94dd5138 S |
321 | BIT(POWER_DOMAIN_INIT)) |
322 | #define SKL_DISPLAY_DDI_B_POWER_DOMAINS ( \ | |
323 | BIT(POWER_DOMAIN_PORT_DDI_B_2_LANES) | \ | |
324 | BIT(POWER_DOMAIN_PORT_DDI_B_4_LANES) | \ | |
325 | BIT(POWER_DOMAIN_INIT)) | |
326 | #define SKL_DISPLAY_DDI_C_POWER_DOMAINS ( \ | |
327 | BIT(POWER_DOMAIN_PORT_DDI_C_2_LANES) | \ | |
328 | BIT(POWER_DOMAIN_PORT_DDI_C_4_LANES) | \ | |
329 | BIT(POWER_DOMAIN_INIT)) | |
330 | #define SKL_DISPLAY_DDI_D_POWER_DOMAINS ( \ | |
331 | BIT(POWER_DOMAIN_PORT_DDI_D_2_LANES) | \ | |
332 | BIT(POWER_DOMAIN_PORT_DDI_D_4_LANES) | \ | |
333 | BIT(POWER_DOMAIN_INIT)) | |
334 | #define SKL_DISPLAY_MISC_IO_POWER_DOMAINS ( \ | |
aeaa2122 | 335 | SKL_DISPLAY_POWERWELL_1_POWER_DOMAINS | \ |
6222709d | 336 | BIT(POWER_DOMAIN_PLLS) | \ |
aeaa2122 | 337 | BIT(POWER_DOMAIN_INIT)) |
94dd5138 S |
338 | #define SKL_DISPLAY_ALWAYS_ON_POWER_DOMAINS ( \ |
339 | (POWER_DOMAIN_MASK & ~(SKL_DISPLAY_POWERWELL_1_POWER_DOMAINS | \ | |
340 | SKL_DISPLAY_POWERWELL_2_POWER_DOMAINS | \ | |
341 | SKL_DISPLAY_DDI_A_E_POWER_DOMAINS | \ | |
342 | SKL_DISPLAY_DDI_B_POWER_DOMAINS | \ | |
343 | SKL_DISPLAY_DDI_C_POWER_DOMAINS | \ | |
344 | SKL_DISPLAY_DDI_D_POWER_DOMAINS | \ | |
345 | SKL_DISPLAY_MISC_IO_POWER_DOMAINS)) | \ | |
346 | BIT(POWER_DOMAIN_INIT)) | |
347 | ||
0b4a2a36 S |
348 | #define BXT_DISPLAY_POWERWELL_2_POWER_DOMAINS ( \ |
349 | BIT(POWER_DOMAIN_TRANSCODER_A) | \ | |
350 | BIT(POWER_DOMAIN_PIPE_B) | \ | |
351 | BIT(POWER_DOMAIN_TRANSCODER_B) | \ | |
352 | BIT(POWER_DOMAIN_PIPE_C) | \ | |
353 | BIT(POWER_DOMAIN_TRANSCODER_C) | \ | |
354 | BIT(POWER_DOMAIN_PIPE_B_PANEL_FITTER) | \ | |
355 | BIT(POWER_DOMAIN_PIPE_C_PANEL_FITTER) | \ | |
356 | BIT(POWER_DOMAIN_PORT_DDI_B_2_LANES) | \ | |
357 | BIT(POWER_DOMAIN_PORT_DDI_B_4_LANES) | \ | |
358 | BIT(POWER_DOMAIN_PORT_DDI_C_2_LANES) | \ | |
359 | BIT(POWER_DOMAIN_PORT_DDI_C_4_LANES) | \ | |
360 | BIT(POWER_DOMAIN_AUX_B) | \ | |
361 | BIT(POWER_DOMAIN_AUX_C) | \ | |
362 | BIT(POWER_DOMAIN_AUDIO) | \ | |
363 | BIT(POWER_DOMAIN_VGA) | \ | |
364 | BIT(POWER_DOMAIN_INIT)) | |
365 | #define BXT_DISPLAY_POWERWELL_1_POWER_DOMAINS ( \ | |
366 | BXT_DISPLAY_POWERWELL_2_POWER_DOMAINS | \ | |
367 | BIT(POWER_DOMAIN_PIPE_A) | \ | |
368 | BIT(POWER_DOMAIN_TRANSCODER_EDP) | \ | |
369 | BIT(POWER_DOMAIN_PIPE_A_PANEL_FITTER) | \ | |
370 | BIT(POWER_DOMAIN_PORT_DDI_A_2_LANES) | \ | |
371 | BIT(POWER_DOMAIN_PORT_DDI_A_4_LANES) | \ | |
372 | BIT(POWER_DOMAIN_AUX_A) | \ | |
373 | BIT(POWER_DOMAIN_PLLS) | \ | |
374 | BIT(POWER_DOMAIN_INIT)) | |
375 | #define BXT_DISPLAY_ALWAYS_ON_POWER_DOMAINS ( \ | |
376 | (POWER_DOMAIN_MASK & ~(BXT_DISPLAY_POWERWELL_1_POWER_DOMAINS | \ | |
377 | BXT_DISPLAY_POWERWELL_2_POWER_DOMAINS)) | \ | |
378 | BIT(POWER_DOMAIN_INIT)) | |
379 | ||
664326f8 SK |
380 | static void assert_can_enable_dc9(struct drm_i915_private *dev_priv) |
381 | { | |
382 | struct drm_device *dev = dev_priv->dev; | |
383 | ||
384 | WARN(!IS_BROXTON(dev), "Platform doesn't support DC9.\n"); | |
385 | WARN((I915_READ(DC_STATE_EN) & DC_STATE_EN_DC9), | |
386 | "DC9 already programmed to be enabled.\n"); | |
387 | WARN(I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC5, | |
388 | "DC5 still not disabled to enable DC9.\n"); | |
389 | WARN(I915_READ(HSW_PWR_WELL_DRIVER), "Power well on.\n"); | |
390 | WARN(intel_irqs_enabled(dev_priv), "Interrupts not disabled yet.\n"); | |
391 | ||
392 | /* | |
393 | * TODO: check for the following to verify the conditions to enter DC9 | |
394 | * state are satisfied: | |
395 | * 1] Check relevant display engine registers to verify if mode set | |
396 | * disable sequence was followed. | |
397 | * 2] Check if display uninitialize sequence is initialized. | |
398 | */ | |
399 | } | |
400 | ||
401 | static void assert_can_disable_dc9(struct drm_i915_private *dev_priv) | |
402 | { | |
403 | WARN(intel_irqs_enabled(dev_priv), "Interrupts not disabled yet.\n"); | |
404 | WARN(!(I915_READ(DC_STATE_EN) & DC_STATE_EN_DC9), | |
405 | "DC9 already programmed to be disabled.\n"); | |
406 | WARN(I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC5, | |
407 | "DC5 still not disabled.\n"); | |
408 | ||
409 | /* | |
410 | * TODO: check for the following to verify DC9 state was indeed | |
411 | * entered before programming to disable it: | |
412 | * 1] Check relevant display engine registers to verify if mode | |
413 | * set disable sequence was followed. | |
414 | * 2] Check if display uninitialize sequence is initialized. | |
415 | */ | |
416 | } | |
417 | ||
418 | void bxt_enable_dc9(struct drm_i915_private *dev_priv) | |
419 | { | |
420 | uint32_t val; | |
421 | ||
422 | assert_can_enable_dc9(dev_priv); | |
423 | ||
424 | DRM_DEBUG_KMS("Enabling DC9\n"); | |
425 | ||
426 | val = I915_READ(DC_STATE_EN); | |
427 | val |= DC_STATE_EN_DC9; | |
428 | I915_WRITE(DC_STATE_EN, val); | |
429 | POSTING_READ(DC_STATE_EN); | |
430 | } | |
431 | ||
432 | void bxt_disable_dc9(struct drm_i915_private *dev_priv) | |
433 | { | |
434 | uint32_t val; | |
435 | ||
436 | assert_can_disable_dc9(dev_priv); | |
437 | ||
438 | DRM_DEBUG_KMS("Disabling DC9\n"); | |
439 | ||
440 | val = I915_READ(DC_STATE_EN); | |
441 | val &= ~DC_STATE_EN_DC9; | |
442 | I915_WRITE(DC_STATE_EN, val); | |
443 | POSTING_READ(DC_STATE_EN); | |
444 | } | |
445 | ||
6b457d31 SK |
446 | static void gen9_set_dc_state_debugmask_memory_up( |
447 | struct drm_i915_private *dev_priv) | |
448 | { | |
449 | uint32_t val; | |
450 | ||
451 | /* The below bit doesn't need to be cleared ever afterwards */ | |
452 | val = I915_READ(DC_STATE_DEBUG); | |
453 | if (!(val & DC_STATE_DEBUG_MASK_MEMORY_UP)) { | |
454 | val |= DC_STATE_DEBUG_MASK_MEMORY_UP; | |
455 | I915_WRITE(DC_STATE_DEBUG, val); | |
456 | POSTING_READ(DC_STATE_DEBUG); | |
457 | } | |
458 | } | |
459 | ||
5aefb239 | 460 | static void assert_can_enable_dc5(struct drm_i915_private *dev_priv) |
dc174300 | 461 | { |
6b457d31 | 462 | struct drm_device *dev = dev_priv->dev; |
5aefb239 SS |
463 | bool pg2_enabled = intel_display_power_well_is_enabled(dev_priv, |
464 | SKL_DISP_PW_2); | |
465 | ||
6ff8ab0d JB |
466 | WARN_ONCE(!IS_SKYLAKE(dev), "Platform doesn't support DC5.\n"); |
467 | WARN_ONCE(!HAS_RUNTIME_PM(dev), "Runtime PM not enabled.\n"); | |
468 | WARN_ONCE(pg2_enabled, "PG2 not disabled to enable DC5.\n"); | |
5aefb239 | 469 | |
6ff8ab0d JB |
470 | WARN_ONCE((I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC5), |
471 | "DC5 already programmed to be enabled.\n"); | |
472 | WARN_ONCE(dev_priv->pm.suspended, | |
473 | "DC5 cannot be enabled, if platform is runtime-suspended.\n"); | |
5aefb239 SS |
474 | |
475 | assert_csr_loaded(dev_priv); | |
476 | } | |
477 | ||
478 | static void assert_can_disable_dc5(struct drm_i915_private *dev_priv) | |
479 | { | |
480 | bool pg2_enabled = intel_display_power_well_is_enabled(dev_priv, | |
481 | SKL_DISP_PW_2); | |
93c7cb6c SS |
482 | /* |
483 | * During initialization, the firmware may not be loaded yet. | |
484 | * We still want to make sure that the DC enabling flag is cleared. | |
485 | */ | |
486 | if (dev_priv->power_domains.initializing) | |
487 | return; | |
5aefb239 | 488 | |
6ff8ab0d JB |
489 | WARN_ONCE(!pg2_enabled, "PG2 not enabled to disable DC5.\n"); |
490 | WARN_ONCE(dev_priv->pm.suspended, | |
5aefb239 SS |
491 | "Disabling of DC5 while platform is runtime-suspended should never happen.\n"); |
492 | } | |
493 | ||
494 | static void gen9_enable_dc5(struct drm_i915_private *dev_priv) | |
495 | { | |
6b457d31 SK |
496 | uint32_t val; |
497 | ||
5aefb239 | 498 | assert_can_enable_dc5(dev_priv); |
6b457d31 SK |
499 | |
500 | DRM_DEBUG_KMS("Enabling DC5\n"); | |
501 | ||
502 | gen9_set_dc_state_debugmask_memory_up(dev_priv); | |
503 | ||
504 | val = I915_READ(DC_STATE_EN); | |
505 | val &= ~DC_STATE_EN_UPTO_DC5_DC6_MASK; | |
506 | val |= DC_STATE_EN_UPTO_DC5; | |
507 | I915_WRITE(DC_STATE_EN, val); | |
508 | POSTING_READ(DC_STATE_EN); | |
dc174300 SS |
509 | } |
510 | ||
511 | static void gen9_disable_dc5(struct drm_i915_private *dev_priv) | |
512 | { | |
6b457d31 SK |
513 | uint32_t val; |
514 | ||
5aefb239 | 515 | assert_can_disable_dc5(dev_priv); |
6b457d31 SK |
516 | |
517 | DRM_DEBUG_KMS("Disabling DC5\n"); | |
518 | ||
519 | val = I915_READ(DC_STATE_EN); | |
520 | val &= ~DC_STATE_EN_UPTO_DC5; | |
521 | I915_WRITE(DC_STATE_EN, val); | |
522 | POSTING_READ(DC_STATE_EN); | |
dc174300 SS |
523 | } |
524 | ||
93c7cb6c | 525 | static void assert_can_enable_dc6(struct drm_i915_private *dev_priv) |
f75a1985 | 526 | { |
74b4f371 | 527 | struct drm_device *dev = dev_priv->dev; |
93c7cb6c | 528 | |
6ff8ab0d JB |
529 | WARN_ONCE(!IS_SKYLAKE(dev), "Platform doesn't support DC6.\n"); |
530 | WARN_ONCE(!HAS_RUNTIME_PM(dev), "Runtime PM not enabled.\n"); | |
531 | WARN_ONCE(I915_READ(UTIL_PIN_CTL) & UTIL_PIN_ENABLE, | |
532 | "Backlight is not disabled.\n"); | |
533 | WARN_ONCE((I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC6), | |
534 | "DC6 already programmed to be enabled.\n"); | |
93c7cb6c SS |
535 | |
536 | assert_csr_loaded(dev_priv); | |
537 | } | |
538 | ||
539 | static void assert_can_disable_dc6(struct drm_i915_private *dev_priv) | |
540 | { | |
541 | /* | |
542 | * During initialization, the firmware may not be loaded yet. | |
543 | * We still want to make sure that the DC enabling flag is cleared. | |
544 | */ | |
545 | if (dev_priv->power_domains.initializing) | |
546 | return; | |
547 | ||
548 | assert_csr_loaded(dev_priv); | |
6ff8ab0d JB |
549 | WARN_ONCE(!(I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC6), |
550 | "DC6 already programmed to be disabled.\n"); | |
93c7cb6c SS |
551 | } |
552 | ||
553 | static void skl_enable_dc6(struct drm_i915_private *dev_priv) | |
554 | { | |
74b4f371 SK |
555 | uint32_t val; |
556 | ||
93c7cb6c | 557 | assert_can_enable_dc6(dev_priv); |
74b4f371 SK |
558 | |
559 | DRM_DEBUG_KMS("Enabling DC6\n"); | |
560 | ||
561 | gen9_set_dc_state_debugmask_memory_up(dev_priv); | |
562 | ||
563 | val = I915_READ(DC_STATE_EN); | |
564 | val &= ~DC_STATE_EN_UPTO_DC5_DC6_MASK; | |
565 | val |= DC_STATE_EN_UPTO_DC6; | |
566 | I915_WRITE(DC_STATE_EN, val); | |
567 | POSTING_READ(DC_STATE_EN); | |
f75a1985 SS |
568 | } |
569 | ||
570 | static void skl_disable_dc6(struct drm_i915_private *dev_priv) | |
571 | { | |
74b4f371 SK |
572 | uint32_t val; |
573 | ||
93c7cb6c | 574 | assert_can_disable_dc6(dev_priv); |
74b4f371 SK |
575 | |
576 | DRM_DEBUG_KMS("Disabling DC6\n"); | |
577 | ||
578 | val = I915_READ(DC_STATE_EN); | |
579 | val &= ~DC_STATE_EN_UPTO_DC6; | |
580 | I915_WRITE(DC_STATE_EN, val); | |
581 | POSTING_READ(DC_STATE_EN); | |
f75a1985 SS |
582 | } |
583 | ||
94dd5138 S |
584 | static void skl_set_power_well(struct drm_i915_private *dev_priv, |
585 | struct i915_power_well *power_well, bool enable) | |
586 | { | |
dc174300 | 587 | struct drm_device *dev = dev_priv->dev; |
94dd5138 S |
588 | uint32_t tmp, fuse_status; |
589 | uint32_t req_mask, state_mask; | |
2a51835f | 590 | bool is_enabled, enable_requested, check_fuse_status = false; |
94dd5138 S |
591 | |
592 | tmp = I915_READ(HSW_PWR_WELL_DRIVER); | |
593 | fuse_status = I915_READ(SKL_FUSE_STATUS); | |
594 | ||
595 | switch (power_well->data) { | |
596 | case SKL_DISP_PW_1: | |
597 | if (wait_for((I915_READ(SKL_FUSE_STATUS) & | |
598 | SKL_FUSE_PG0_DIST_STATUS), 1)) { | |
599 | DRM_ERROR("PG0 not enabled\n"); | |
600 | return; | |
601 | } | |
602 | break; | |
603 | case SKL_DISP_PW_2: | |
604 | if (!(fuse_status & SKL_FUSE_PG1_DIST_STATUS)) { | |
605 | DRM_ERROR("PG1 in disabled state\n"); | |
606 | return; | |
607 | } | |
608 | break; | |
609 | case SKL_DISP_PW_DDI_A_E: | |
610 | case SKL_DISP_PW_DDI_B: | |
611 | case SKL_DISP_PW_DDI_C: | |
612 | case SKL_DISP_PW_DDI_D: | |
613 | case SKL_DISP_PW_MISC_IO: | |
614 | break; | |
615 | default: | |
616 | WARN(1, "Unknown power well %lu\n", power_well->data); | |
617 | return; | |
618 | } | |
619 | ||
620 | req_mask = SKL_POWER_WELL_REQ(power_well->data); | |
2a51835f | 621 | enable_requested = tmp & req_mask; |
94dd5138 | 622 | state_mask = SKL_POWER_WELL_STATE(power_well->data); |
2a51835f | 623 | is_enabled = tmp & state_mask; |
94dd5138 S |
624 | |
625 | if (enable) { | |
2a51835f | 626 | if (!enable_requested) { |
dc174300 SS |
627 | WARN((tmp & state_mask) && |
628 | !I915_READ(HSW_PWR_WELL_BIOS), | |
629 | "Invalid for power well status to be enabled, unless done by the BIOS, \ | |
630 | when request is to disable!\n"); | |
f75a1985 SS |
631 | if ((GEN9_ENABLE_DC5(dev) || SKL_ENABLE_DC6(dev)) && |
632 | power_well->data == SKL_DISP_PW_2) { | |
633 | if (SKL_ENABLE_DC6(dev)) { | |
634 | skl_disable_dc6(dev_priv); | |
635 | /* | |
636 | * DDI buffer programming unnecessary during driver-load/resume | |
637 | * as it's already done during modeset initialization then. | |
638 | * It's also invalid here as encoder list is still uninitialized. | |
639 | */ | |
640 | if (!dev_priv->power_domains.initializing) | |
641 | intel_prepare_ddi(dev); | |
642 | } else { | |
643 | gen9_disable_dc5(dev_priv); | |
644 | } | |
645 | } | |
94dd5138 | 646 | I915_WRITE(HSW_PWR_WELL_DRIVER, tmp | req_mask); |
94dd5138 S |
647 | } |
648 | ||
2a51835f | 649 | if (!is_enabled) { |
510e6fdd | 650 | DRM_DEBUG_KMS("Enabling %s\n", power_well->name); |
94dd5138 S |
651 | if (wait_for((I915_READ(HSW_PWR_WELL_DRIVER) & |
652 | state_mask), 1)) | |
653 | DRM_ERROR("%s enable timeout\n", | |
654 | power_well->name); | |
655 | check_fuse_status = true; | |
656 | } | |
657 | } else { | |
2a51835f | 658 | if (enable_requested) { |
08aef7ca AM |
659 | if (IS_SKYLAKE(dev) && |
660 | (power_well->data == SKL_DISP_PW_1) && | |
661 | (intel_csr_load_status_get(dev_priv) == FW_LOADED)) | |
662 | DRM_DEBUG_KMS("Not Disabling PW1, dmc will handle\n"); | |
663 | else { | |
664 | I915_WRITE(HSW_PWR_WELL_DRIVER, tmp & ~req_mask); | |
665 | POSTING_READ(HSW_PWR_WELL_DRIVER); | |
666 | DRM_DEBUG_KMS("Disabling %s\n", power_well->name); | |
667 | } | |
dc174300 | 668 | |
f75a1985 | 669 | if ((GEN9_ENABLE_DC5(dev) || SKL_ENABLE_DC6(dev)) && |
dc174300 SS |
670 | power_well->data == SKL_DISP_PW_2) { |
671 | enum csr_state state; | |
f75a1985 SS |
672 | /* TODO: wait for a completion event or |
673 | * similar here instead of busy | |
674 | * waiting using wait_for function. | |
675 | */ | |
dc174300 SS |
676 | wait_for((state = intel_csr_load_status_get(dev_priv)) != |
677 | FW_UNINITIALIZED, 1000); | |
678 | if (state != FW_LOADED) | |
6ff8ab0d | 679 | DRM_DEBUG("CSR firmware not ready (%d)\n", |
dc174300 SS |
680 | state); |
681 | else | |
f75a1985 SS |
682 | if (SKL_ENABLE_DC6(dev)) |
683 | skl_enable_dc6(dev_priv); | |
684 | else | |
685 | gen9_enable_dc5(dev_priv); | |
dc174300 | 686 | } |
94dd5138 S |
687 | } |
688 | } | |
689 | ||
690 | if (check_fuse_status) { | |
691 | if (power_well->data == SKL_DISP_PW_1) { | |
692 | if (wait_for((I915_READ(SKL_FUSE_STATUS) & | |
693 | SKL_FUSE_PG1_DIST_STATUS), 1)) | |
694 | DRM_ERROR("PG1 distributing status timeout\n"); | |
695 | } else if (power_well->data == SKL_DISP_PW_2) { | |
696 | if (wait_for((I915_READ(SKL_FUSE_STATUS) & | |
697 | SKL_FUSE_PG2_DIST_STATUS), 1)) | |
698 | DRM_ERROR("PG2 distributing status timeout\n"); | |
699 | } | |
700 | } | |
d14c0343 DL |
701 | |
702 | if (enable && !is_enabled) | |
703 | skl_power_well_post_enable(dev_priv, power_well); | |
94dd5138 S |
704 | } |
705 | ||
9c065a7d DV |
706 | static void hsw_power_well_sync_hw(struct drm_i915_private *dev_priv, |
707 | struct i915_power_well *power_well) | |
708 | { | |
709 | hsw_set_power_well(dev_priv, power_well, power_well->count > 0); | |
710 | ||
711 | /* | |
712 | * We're taking over the BIOS, so clear any requests made by it since | |
713 | * the driver is in charge now. | |
714 | */ | |
715 | if (I915_READ(HSW_PWR_WELL_BIOS) & HSW_PWR_WELL_ENABLE_REQUEST) | |
716 | I915_WRITE(HSW_PWR_WELL_BIOS, 0); | |
717 | } | |
718 | ||
719 | static void hsw_power_well_enable(struct drm_i915_private *dev_priv, | |
720 | struct i915_power_well *power_well) | |
721 | { | |
722 | hsw_set_power_well(dev_priv, power_well, true); | |
723 | } | |
724 | ||
725 | static void hsw_power_well_disable(struct drm_i915_private *dev_priv, | |
726 | struct i915_power_well *power_well) | |
727 | { | |
728 | hsw_set_power_well(dev_priv, power_well, false); | |
729 | } | |
730 | ||
94dd5138 S |
731 | static bool skl_power_well_enabled(struct drm_i915_private *dev_priv, |
732 | struct i915_power_well *power_well) | |
733 | { | |
734 | uint32_t mask = SKL_POWER_WELL_REQ(power_well->data) | | |
735 | SKL_POWER_WELL_STATE(power_well->data); | |
736 | ||
737 | return (I915_READ(HSW_PWR_WELL_DRIVER) & mask) == mask; | |
738 | } | |
739 | ||
740 | static void skl_power_well_sync_hw(struct drm_i915_private *dev_priv, | |
741 | struct i915_power_well *power_well) | |
742 | { | |
743 | skl_set_power_well(dev_priv, power_well, power_well->count > 0); | |
744 | ||
745 | /* Clear any request made by BIOS as driver is taking over */ | |
746 | I915_WRITE(HSW_PWR_WELL_BIOS, 0); | |
747 | } | |
748 | ||
749 | static void skl_power_well_enable(struct drm_i915_private *dev_priv, | |
750 | struct i915_power_well *power_well) | |
751 | { | |
752 | skl_set_power_well(dev_priv, power_well, true); | |
753 | } | |
754 | ||
755 | static void skl_power_well_disable(struct drm_i915_private *dev_priv, | |
756 | struct i915_power_well *power_well) | |
757 | { | |
758 | skl_set_power_well(dev_priv, power_well, false); | |
759 | } | |
760 | ||
9c065a7d DV |
761 | static void i9xx_always_on_power_well_noop(struct drm_i915_private *dev_priv, |
762 | struct i915_power_well *power_well) | |
763 | { | |
764 | } | |
765 | ||
766 | static bool i9xx_always_on_power_well_enabled(struct drm_i915_private *dev_priv, | |
767 | struct i915_power_well *power_well) | |
768 | { | |
769 | return true; | |
770 | } | |
771 | ||
772 | static void vlv_set_power_well(struct drm_i915_private *dev_priv, | |
773 | struct i915_power_well *power_well, bool enable) | |
774 | { | |
775 | enum punit_power_well power_well_id = power_well->data; | |
776 | u32 mask; | |
777 | u32 state; | |
778 | u32 ctrl; | |
779 | ||
780 | mask = PUNIT_PWRGT_MASK(power_well_id); | |
781 | state = enable ? PUNIT_PWRGT_PWR_ON(power_well_id) : | |
782 | PUNIT_PWRGT_PWR_GATE(power_well_id); | |
783 | ||
784 | mutex_lock(&dev_priv->rps.hw_lock); | |
785 | ||
786 | #define COND \ | |
787 | ((vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_STATUS) & mask) == state) | |
788 | ||
789 | if (COND) | |
790 | goto out; | |
791 | ||
792 | ctrl = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL); | |
793 | ctrl &= ~mask; | |
794 | ctrl |= state; | |
795 | vlv_punit_write(dev_priv, PUNIT_REG_PWRGT_CTRL, ctrl); | |
796 | ||
797 | if (wait_for(COND, 100)) | |
7e35ab88 | 798 | DRM_ERROR("timeout setting power well state %08x (%08x)\n", |
9c065a7d DV |
799 | state, |
800 | vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL)); | |
801 | ||
802 | #undef COND | |
803 | ||
804 | out: | |
805 | mutex_unlock(&dev_priv->rps.hw_lock); | |
806 | } | |
807 | ||
808 | static void vlv_power_well_sync_hw(struct drm_i915_private *dev_priv, | |
809 | struct i915_power_well *power_well) | |
810 | { | |
811 | vlv_set_power_well(dev_priv, power_well, power_well->count > 0); | |
812 | } | |
813 | ||
814 | static void vlv_power_well_enable(struct drm_i915_private *dev_priv, | |
815 | struct i915_power_well *power_well) | |
816 | { | |
817 | vlv_set_power_well(dev_priv, power_well, true); | |
818 | } | |
819 | ||
820 | static void vlv_power_well_disable(struct drm_i915_private *dev_priv, | |
821 | struct i915_power_well *power_well) | |
822 | { | |
823 | vlv_set_power_well(dev_priv, power_well, false); | |
824 | } | |
825 | ||
826 | static bool vlv_power_well_enabled(struct drm_i915_private *dev_priv, | |
827 | struct i915_power_well *power_well) | |
828 | { | |
829 | int power_well_id = power_well->data; | |
830 | bool enabled = false; | |
831 | u32 mask; | |
832 | u32 state; | |
833 | u32 ctrl; | |
834 | ||
835 | mask = PUNIT_PWRGT_MASK(power_well_id); | |
836 | ctrl = PUNIT_PWRGT_PWR_ON(power_well_id); | |
837 | ||
838 | mutex_lock(&dev_priv->rps.hw_lock); | |
839 | ||
840 | state = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_STATUS) & mask; | |
841 | /* | |
842 | * We only ever set the power-on and power-gate states, anything | |
843 | * else is unexpected. | |
844 | */ | |
845 | WARN_ON(state != PUNIT_PWRGT_PWR_ON(power_well_id) && | |
846 | state != PUNIT_PWRGT_PWR_GATE(power_well_id)); | |
847 | if (state == ctrl) | |
848 | enabled = true; | |
849 | ||
850 | /* | |
851 | * A transient state at this point would mean some unexpected party | |
852 | * is poking at the power controls too. | |
853 | */ | |
854 | ctrl = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL) & mask; | |
855 | WARN_ON(ctrl != state); | |
856 | ||
857 | mutex_unlock(&dev_priv->rps.hw_lock); | |
858 | ||
859 | return enabled; | |
860 | } | |
861 | ||
2be7d540 | 862 | static void vlv_display_power_well_init(struct drm_i915_private *dev_priv) |
9c065a7d | 863 | { |
5a8fbb7d VS |
864 | enum pipe pipe; |
865 | ||
866 | /* | |
867 | * Enable the CRI clock source so we can get at the | |
868 | * display and the reference clock for VGA | |
869 | * hotplug / manual detection. Supposedly DSI also | |
870 | * needs the ref clock up and running. | |
871 | * | |
872 | * CHV DPLL B/C have some issues if VGA mode is enabled. | |
873 | */ | |
874 | for_each_pipe(dev_priv->dev, pipe) { | |
875 | u32 val = I915_READ(DPLL(pipe)); | |
876 | ||
877 | val |= DPLL_REF_CLK_ENABLE_VLV | DPLL_VGA_MODE_DIS; | |
878 | if (pipe != PIPE_A) | |
879 | val |= DPLL_INTEGRATED_CRI_CLK_VLV; | |
880 | ||
881 | I915_WRITE(DPLL(pipe), val); | |
882 | } | |
9c065a7d DV |
883 | |
884 | spin_lock_irq(&dev_priv->irq_lock); | |
885 | valleyview_enable_display_irqs(dev_priv); | |
886 | spin_unlock_irq(&dev_priv->irq_lock); | |
887 | ||
888 | /* | |
889 | * During driver initialization/resume we can avoid restoring the | |
890 | * part of the HW/SW state that will be inited anyway explicitly. | |
891 | */ | |
892 | if (dev_priv->power_domains.initializing) | |
893 | return; | |
894 | ||
b963291c | 895 | intel_hpd_init(dev_priv); |
9c065a7d DV |
896 | |
897 | i915_redisable_vga_power_on(dev_priv->dev); | |
898 | } | |
899 | ||
2be7d540 VS |
900 | static void vlv_display_power_well_deinit(struct drm_i915_private *dev_priv) |
901 | { | |
902 | spin_lock_irq(&dev_priv->irq_lock); | |
903 | valleyview_disable_display_irqs(dev_priv); | |
904 | spin_unlock_irq(&dev_priv->irq_lock); | |
905 | ||
906 | vlv_power_sequencer_reset(dev_priv); | |
907 | } | |
908 | ||
909 | static void vlv_display_power_well_enable(struct drm_i915_private *dev_priv, | |
910 | struct i915_power_well *power_well) | |
911 | { | |
912 | WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DISP2D); | |
913 | ||
914 | vlv_set_power_well(dev_priv, power_well, true); | |
915 | ||
916 | vlv_display_power_well_init(dev_priv); | |
917 | } | |
918 | ||
9c065a7d DV |
919 | static void vlv_display_power_well_disable(struct drm_i915_private *dev_priv, |
920 | struct i915_power_well *power_well) | |
921 | { | |
922 | WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DISP2D); | |
923 | ||
2be7d540 | 924 | vlv_display_power_well_deinit(dev_priv); |
9c065a7d DV |
925 | |
926 | vlv_set_power_well(dev_priv, power_well, false); | |
9c065a7d DV |
927 | } |
928 | ||
929 | static void vlv_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv, | |
930 | struct i915_power_well *power_well) | |
931 | { | |
932 | WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DPIO_CMN_BC); | |
933 | ||
5a8fbb7d | 934 | /* since ref/cri clock was enabled */ |
9c065a7d DV |
935 | udelay(1); /* >10ns for cmnreset, >0ns for sidereset */ |
936 | ||
937 | vlv_set_power_well(dev_priv, power_well, true); | |
938 | ||
939 | /* | |
940 | * From VLV2A0_DP_eDP_DPIO_driver_vbios_notes_10.docx - | |
941 | * 6. De-assert cmn_reset/side_reset. Same as VLV X0. | |
942 | * a. GUnit 0x2110 bit[0] set to 1 (def 0) | |
943 | * b. The other bits such as sfr settings / modesel may all | |
944 | * be set to 0. | |
945 | * | |
946 | * This should only be done on init and resume from S3 with | |
947 | * both PLLs disabled, or we risk losing DPIO and PLL | |
948 | * synchronization. | |
949 | */ | |
950 | I915_WRITE(DPIO_CTL, I915_READ(DPIO_CTL) | DPIO_CMNRST); | |
951 | } | |
952 | ||
953 | static void vlv_dpio_cmn_power_well_disable(struct drm_i915_private *dev_priv, | |
954 | struct i915_power_well *power_well) | |
955 | { | |
956 | enum pipe pipe; | |
957 | ||
958 | WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DPIO_CMN_BC); | |
959 | ||
960 | for_each_pipe(dev_priv, pipe) | |
961 | assert_pll_disabled(dev_priv, pipe); | |
962 | ||
963 | /* Assert common reset */ | |
964 | I915_WRITE(DPIO_CTL, I915_READ(DPIO_CTL) & ~DPIO_CMNRST); | |
965 | ||
966 | vlv_set_power_well(dev_priv, power_well, false); | |
967 | } | |
968 | ||
30142273 VS |
969 | #define POWER_DOMAIN_MASK (BIT(POWER_DOMAIN_NUM) - 1) |
970 | ||
971 | static struct i915_power_well *lookup_power_well(struct drm_i915_private *dev_priv, | |
972 | int power_well_id) | |
973 | { | |
974 | struct i915_power_domains *power_domains = &dev_priv->power_domains; | |
975 | struct i915_power_well *power_well; | |
976 | int i; | |
977 | ||
978 | for_each_power_well(i, power_well, POWER_DOMAIN_MASK, power_domains) { | |
979 | if (power_well->data == power_well_id) | |
980 | return power_well; | |
981 | } | |
982 | ||
983 | return NULL; | |
984 | } | |
985 | ||
986 | #define BITS_SET(val, bits) (((val) & (bits)) == (bits)) | |
987 | ||
988 | static void assert_chv_phy_status(struct drm_i915_private *dev_priv) | |
989 | { | |
990 | struct i915_power_well *cmn_bc = | |
991 | lookup_power_well(dev_priv, PUNIT_POWER_WELL_DPIO_CMN_BC); | |
992 | struct i915_power_well *cmn_d = | |
993 | lookup_power_well(dev_priv, PUNIT_POWER_WELL_DPIO_CMN_D); | |
994 | u32 phy_control = dev_priv->chv_phy_control; | |
995 | u32 phy_status = 0; | |
3be60de9 | 996 | u32 phy_status_mask = 0xffffffff; |
30142273 VS |
997 | u32 tmp; |
998 | ||
3be60de9 VS |
999 | /* |
1000 | * The BIOS can leave the PHY is some weird state | |
1001 | * where it doesn't fully power down some parts. | |
1002 | * Disable the asserts until the PHY has been fully | |
1003 | * reset (ie. the power well has been disabled at | |
1004 | * least once). | |
1005 | */ | |
1006 | if (!dev_priv->chv_phy_assert[DPIO_PHY0]) | |
1007 | phy_status_mask &= ~(PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH0) | | |
1008 | PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 0) | | |
1009 | PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 1) | | |
1010 | PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH1) | | |
1011 | PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 0) | | |
1012 | PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 1)); | |
1013 | ||
1014 | if (!dev_priv->chv_phy_assert[DPIO_PHY1]) | |
1015 | phy_status_mask &= ~(PHY_STATUS_CMN_LDO(DPIO_PHY1, DPIO_CH0) | | |
1016 | PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 0) | | |
1017 | PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 1)); | |
1018 | ||
30142273 VS |
1019 | if (cmn_bc->ops->is_enabled(dev_priv, cmn_bc)) { |
1020 | phy_status |= PHY_POWERGOOD(DPIO_PHY0); | |
1021 | ||
1022 | /* this assumes override is only used to enable lanes */ | |
1023 | if ((phy_control & PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH0)) == 0) | |
1024 | phy_control |= PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH0); | |
1025 | ||
1026 | if ((phy_control & PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH1)) == 0) | |
1027 | phy_control |= PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH1); | |
1028 | ||
1029 | /* CL1 is on whenever anything is on in either channel */ | |
1030 | if (BITS_SET(phy_control, | |
1031 | PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH0) | | |
1032 | PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH1))) | |
1033 | phy_status |= PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH0); | |
1034 | ||
1035 | /* | |
1036 | * The DPLLB check accounts for the pipe B + port A usage | |
1037 | * with CL2 powered up but all the lanes in the second channel | |
1038 | * powered down. | |
1039 | */ | |
1040 | if (BITS_SET(phy_control, | |
1041 | PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH1)) && | |
1042 | (I915_READ(DPLL(PIPE_B)) & DPLL_VCO_ENABLE) == 0) | |
1043 | phy_status |= PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH1); | |
1044 | ||
1045 | if (BITS_SET(phy_control, | |
1046 | PHY_CH_POWER_DOWN_OVRD(0x3, DPIO_PHY0, DPIO_CH0))) | |
1047 | phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 0); | |
1048 | if (BITS_SET(phy_control, | |
1049 | PHY_CH_POWER_DOWN_OVRD(0xc, DPIO_PHY0, DPIO_CH0))) | |
1050 | phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 1); | |
1051 | ||
1052 | if (BITS_SET(phy_control, | |
1053 | PHY_CH_POWER_DOWN_OVRD(0x3, DPIO_PHY0, DPIO_CH1))) | |
1054 | phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 0); | |
1055 | if (BITS_SET(phy_control, | |
1056 | PHY_CH_POWER_DOWN_OVRD(0xc, DPIO_PHY0, DPIO_CH1))) | |
1057 | phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 1); | |
1058 | } | |
1059 | ||
1060 | if (cmn_d->ops->is_enabled(dev_priv, cmn_d)) { | |
1061 | phy_status |= PHY_POWERGOOD(DPIO_PHY1); | |
1062 | ||
1063 | /* this assumes override is only used to enable lanes */ | |
1064 | if ((phy_control & PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY1, DPIO_CH0)) == 0) | |
1065 | phy_control |= PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY1, DPIO_CH0); | |
1066 | ||
1067 | if (BITS_SET(phy_control, | |
1068 | PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY1, DPIO_CH0))) | |
1069 | phy_status |= PHY_STATUS_CMN_LDO(DPIO_PHY1, DPIO_CH0); | |
1070 | ||
1071 | if (BITS_SET(phy_control, | |
1072 | PHY_CH_POWER_DOWN_OVRD(0x3, DPIO_PHY1, DPIO_CH0))) | |
1073 | phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 0); | |
1074 | if (BITS_SET(phy_control, | |
1075 | PHY_CH_POWER_DOWN_OVRD(0xc, DPIO_PHY1, DPIO_CH0))) | |
1076 | phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 1); | |
1077 | } | |
1078 | ||
3be60de9 VS |
1079 | phy_status &= phy_status_mask; |
1080 | ||
30142273 VS |
1081 | /* |
1082 | * The PHY may be busy with some initial calibration and whatnot, | |
1083 | * so the power state can take a while to actually change. | |
1084 | */ | |
3be60de9 | 1085 | if (wait_for((tmp = I915_READ(DISPLAY_PHY_STATUS) & phy_status_mask) == phy_status, 10)) |
30142273 VS |
1086 | WARN(phy_status != tmp, |
1087 | "Unexpected PHY_STATUS 0x%08x, expected 0x%08x (PHY_CONTROL=0x%08x)\n", | |
1088 | tmp, phy_status, dev_priv->chv_phy_control); | |
1089 | } | |
1090 | ||
1091 | #undef BITS_SET | |
1092 | ||
9c065a7d DV |
1093 | static void chv_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv, |
1094 | struct i915_power_well *power_well) | |
1095 | { | |
1096 | enum dpio_phy phy; | |
e0fce78f VS |
1097 | enum pipe pipe; |
1098 | uint32_t tmp; | |
9c065a7d DV |
1099 | |
1100 | WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DPIO_CMN_BC && | |
1101 | power_well->data != PUNIT_POWER_WELL_DPIO_CMN_D); | |
1102 | ||
e0fce78f VS |
1103 | if (power_well->data == PUNIT_POWER_WELL_DPIO_CMN_BC) { |
1104 | pipe = PIPE_A; | |
9c065a7d | 1105 | phy = DPIO_PHY0; |
e0fce78f VS |
1106 | } else { |
1107 | pipe = PIPE_C; | |
9c065a7d | 1108 | phy = DPIO_PHY1; |
e0fce78f | 1109 | } |
5a8fbb7d VS |
1110 | |
1111 | /* since ref/cri clock was enabled */ | |
9c065a7d DV |
1112 | udelay(1); /* >10ns for cmnreset, >0ns for sidereset */ |
1113 | vlv_set_power_well(dev_priv, power_well, true); | |
1114 | ||
1115 | /* Poll for phypwrgood signal */ | |
1116 | if (wait_for(I915_READ(DISPLAY_PHY_STATUS) & PHY_POWERGOOD(phy), 1)) | |
1117 | DRM_ERROR("Display PHY %d is not power up\n", phy); | |
1118 | ||
e0fce78f VS |
1119 | mutex_lock(&dev_priv->sb_lock); |
1120 | ||
1121 | /* Enable dynamic power down */ | |
1122 | tmp = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW28); | |
ee279218 VS |
1123 | tmp |= DPIO_DYNPWRDOWNEN_CH0 | DPIO_CL1POWERDOWNEN | |
1124 | DPIO_SUS_CLK_CONFIG_GATE_CLKREQ; | |
e0fce78f VS |
1125 | vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW28, tmp); |
1126 | ||
1127 | if (power_well->data == PUNIT_POWER_WELL_DPIO_CMN_BC) { | |
1128 | tmp = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW6_CH1); | |
1129 | tmp |= DPIO_DYNPWRDOWNEN_CH1; | |
1130 | vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW6_CH1, tmp); | |
3e288786 VS |
1131 | } else { |
1132 | /* | |
1133 | * Force the non-existing CL2 off. BXT does this | |
1134 | * too, so maybe it saves some power even though | |
1135 | * CL2 doesn't exist? | |
1136 | */ | |
1137 | tmp = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW30); | |
1138 | tmp |= DPIO_CL2_LDOFUSE_PWRENB; | |
1139 | vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW30, tmp); | |
e0fce78f VS |
1140 | } |
1141 | ||
1142 | mutex_unlock(&dev_priv->sb_lock); | |
1143 | ||
70722468 VS |
1144 | dev_priv->chv_phy_control |= PHY_COM_LANE_RESET_DEASSERT(phy); |
1145 | I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control); | |
e0fce78f VS |
1146 | |
1147 | DRM_DEBUG_KMS("Enabled DPIO PHY%d (PHY_CONTROL=0x%08x)\n", | |
1148 | phy, dev_priv->chv_phy_control); | |
30142273 VS |
1149 | |
1150 | assert_chv_phy_status(dev_priv); | |
9c065a7d DV |
1151 | } |
1152 | ||
1153 | static void chv_dpio_cmn_power_well_disable(struct drm_i915_private *dev_priv, | |
1154 | struct i915_power_well *power_well) | |
1155 | { | |
1156 | enum dpio_phy phy; | |
1157 | ||
1158 | WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DPIO_CMN_BC && | |
1159 | power_well->data != PUNIT_POWER_WELL_DPIO_CMN_D); | |
1160 | ||
1161 | if (power_well->data == PUNIT_POWER_WELL_DPIO_CMN_BC) { | |
1162 | phy = DPIO_PHY0; | |
1163 | assert_pll_disabled(dev_priv, PIPE_A); | |
1164 | assert_pll_disabled(dev_priv, PIPE_B); | |
1165 | } else { | |
1166 | phy = DPIO_PHY1; | |
1167 | assert_pll_disabled(dev_priv, PIPE_C); | |
1168 | } | |
1169 | ||
70722468 VS |
1170 | dev_priv->chv_phy_control &= ~PHY_COM_LANE_RESET_DEASSERT(phy); |
1171 | I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control); | |
9c065a7d DV |
1172 | |
1173 | vlv_set_power_well(dev_priv, power_well, false); | |
e0fce78f VS |
1174 | |
1175 | DRM_DEBUG_KMS("Disabled DPIO PHY%d (PHY_CONTROL=0x%08x)\n", | |
1176 | phy, dev_priv->chv_phy_control); | |
30142273 | 1177 | |
3be60de9 VS |
1178 | /* PHY is fully reset now, so we can enable the PHY state asserts */ |
1179 | dev_priv->chv_phy_assert[phy] = true; | |
1180 | ||
30142273 | 1181 | assert_chv_phy_status(dev_priv); |
e0fce78f VS |
1182 | } |
1183 | ||
6669e39f VS |
1184 | static void assert_chv_phy_powergate(struct drm_i915_private *dev_priv, enum dpio_phy phy, |
1185 | enum dpio_channel ch, bool override, unsigned int mask) | |
1186 | { | |
1187 | enum pipe pipe = phy == DPIO_PHY0 ? PIPE_A : PIPE_C; | |
1188 | u32 reg, val, expected, actual; | |
1189 | ||
3be60de9 VS |
1190 | /* |
1191 | * The BIOS can leave the PHY is some weird state | |
1192 | * where it doesn't fully power down some parts. | |
1193 | * Disable the asserts until the PHY has been fully | |
1194 | * reset (ie. the power well has been disabled at | |
1195 | * least once). | |
1196 | */ | |
1197 | if (!dev_priv->chv_phy_assert[phy]) | |
1198 | return; | |
1199 | ||
6669e39f VS |
1200 | if (ch == DPIO_CH0) |
1201 | reg = _CHV_CMN_DW0_CH0; | |
1202 | else | |
1203 | reg = _CHV_CMN_DW6_CH1; | |
1204 | ||
1205 | mutex_lock(&dev_priv->sb_lock); | |
1206 | val = vlv_dpio_read(dev_priv, pipe, reg); | |
1207 | mutex_unlock(&dev_priv->sb_lock); | |
1208 | ||
1209 | /* | |
1210 | * This assumes !override is only used when the port is disabled. | |
1211 | * All lanes should power down even without the override when | |
1212 | * the port is disabled. | |
1213 | */ | |
1214 | if (!override || mask == 0xf) { | |
1215 | expected = DPIO_ALLDL_POWERDOWN | DPIO_ANYDL_POWERDOWN; | |
1216 | /* | |
1217 | * If CH1 common lane is not active anymore | |
1218 | * (eg. for pipe B DPLL) the entire channel will | |
1219 | * shut down, which causes the common lane registers | |
1220 | * to read as 0. That means we can't actually check | |
1221 | * the lane power down status bits, but as the entire | |
1222 | * register reads as 0 it's a good indication that the | |
1223 | * channel is indeed entirely powered down. | |
1224 | */ | |
1225 | if (ch == DPIO_CH1 && val == 0) | |
1226 | expected = 0; | |
1227 | } else if (mask != 0x0) { | |
1228 | expected = DPIO_ANYDL_POWERDOWN; | |
1229 | } else { | |
1230 | expected = 0; | |
1231 | } | |
1232 | ||
1233 | if (ch == DPIO_CH0) | |
1234 | actual = val >> DPIO_ANYDL_POWERDOWN_SHIFT_CH0; | |
1235 | else | |
1236 | actual = val >> DPIO_ANYDL_POWERDOWN_SHIFT_CH1; | |
1237 | actual &= DPIO_ALLDL_POWERDOWN | DPIO_ANYDL_POWERDOWN; | |
1238 | ||
1239 | WARN(actual != expected, | |
1240 | "Unexpected DPIO lane power down: all %d, any %d. Expected: all %d, any %d. (0x%x = 0x%08x)\n", | |
1241 | !!(actual & DPIO_ALLDL_POWERDOWN), !!(actual & DPIO_ANYDL_POWERDOWN), | |
1242 | !!(expected & DPIO_ALLDL_POWERDOWN), !!(expected & DPIO_ANYDL_POWERDOWN), | |
1243 | reg, val); | |
1244 | } | |
1245 | ||
b0b33846 VS |
1246 | bool chv_phy_powergate_ch(struct drm_i915_private *dev_priv, enum dpio_phy phy, |
1247 | enum dpio_channel ch, bool override) | |
1248 | { | |
1249 | struct i915_power_domains *power_domains = &dev_priv->power_domains; | |
1250 | bool was_override; | |
1251 | ||
1252 | mutex_lock(&power_domains->lock); | |
1253 | ||
1254 | was_override = dev_priv->chv_phy_control & PHY_CH_POWER_DOWN_OVRD_EN(phy, ch); | |
1255 | ||
1256 | if (override == was_override) | |
1257 | goto out; | |
1258 | ||
1259 | if (override) | |
1260 | dev_priv->chv_phy_control |= PHY_CH_POWER_DOWN_OVRD_EN(phy, ch); | |
1261 | else | |
1262 | dev_priv->chv_phy_control &= ~PHY_CH_POWER_DOWN_OVRD_EN(phy, ch); | |
1263 | ||
1264 | I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control); | |
1265 | ||
1266 | DRM_DEBUG_KMS("Power gating DPIO PHY%d CH%d (DPIO_PHY_CONTROL=0x%08x)\n", | |
1267 | phy, ch, dev_priv->chv_phy_control); | |
1268 | ||
30142273 VS |
1269 | assert_chv_phy_status(dev_priv); |
1270 | ||
b0b33846 VS |
1271 | out: |
1272 | mutex_unlock(&power_domains->lock); | |
1273 | ||
1274 | return was_override; | |
1275 | } | |
1276 | ||
e0fce78f VS |
1277 | void chv_phy_powergate_lanes(struct intel_encoder *encoder, |
1278 | bool override, unsigned int mask) | |
1279 | { | |
1280 | struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); | |
1281 | struct i915_power_domains *power_domains = &dev_priv->power_domains; | |
1282 | enum dpio_phy phy = vlv_dport_to_phy(enc_to_dig_port(&encoder->base)); | |
1283 | enum dpio_channel ch = vlv_dport_to_channel(enc_to_dig_port(&encoder->base)); | |
1284 | ||
1285 | mutex_lock(&power_domains->lock); | |
1286 | ||
1287 | dev_priv->chv_phy_control &= ~PHY_CH_POWER_DOWN_OVRD(0xf, phy, ch); | |
1288 | dev_priv->chv_phy_control |= PHY_CH_POWER_DOWN_OVRD(mask, phy, ch); | |
1289 | ||
1290 | if (override) | |
1291 | dev_priv->chv_phy_control |= PHY_CH_POWER_DOWN_OVRD_EN(phy, ch); | |
1292 | else | |
1293 | dev_priv->chv_phy_control &= ~PHY_CH_POWER_DOWN_OVRD_EN(phy, ch); | |
1294 | ||
1295 | I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control); | |
1296 | ||
1297 | DRM_DEBUG_KMS("Power gating DPIO PHY%d CH%d lanes 0x%x (PHY_CONTROL=0x%08x)\n", | |
1298 | phy, ch, mask, dev_priv->chv_phy_control); | |
1299 | ||
30142273 VS |
1300 | assert_chv_phy_status(dev_priv); |
1301 | ||
6669e39f VS |
1302 | assert_chv_phy_powergate(dev_priv, phy, ch, override, mask); |
1303 | ||
e0fce78f | 1304 | mutex_unlock(&power_domains->lock); |
9c065a7d DV |
1305 | } |
1306 | ||
1307 | static bool chv_pipe_power_well_enabled(struct drm_i915_private *dev_priv, | |
1308 | struct i915_power_well *power_well) | |
1309 | { | |
1310 | enum pipe pipe = power_well->data; | |
1311 | bool enabled; | |
1312 | u32 state, ctrl; | |
1313 | ||
1314 | mutex_lock(&dev_priv->rps.hw_lock); | |
1315 | ||
1316 | state = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) & DP_SSS_MASK(pipe); | |
1317 | /* | |
1318 | * We only ever set the power-on and power-gate states, anything | |
1319 | * else is unexpected. | |
1320 | */ | |
1321 | WARN_ON(state != DP_SSS_PWR_ON(pipe) && state != DP_SSS_PWR_GATE(pipe)); | |
1322 | enabled = state == DP_SSS_PWR_ON(pipe); | |
1323 | ||
1324 | /* | |
1325 | * A transient state at this point would mean some unexpected party | |
1326 | * is poking at the power controls too. | |
1327 | */ | |
1328 | ctrl = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) & DP_SSC_MASK(pipe); | |
1329 | WARN_ON(ctrl << 16 != state); | |
1330 | ||
1331 | mutex_unlock(&dev_priv->rps.hw_lock); | |
1332 | ||
1333 | return enabled; | |
1334 | } | |
1335 | ||
1336 | static void chv_set_pipe_power_well(struct drm_i915_private *dev_priv, | |
1337 | struct i915_power_well *power_well, | |
1338 | bool enable) | |
1339 | { | |
1340 | enum pipe pipe = power_well->data; | |
1341 | u32 state; | |
1342 | u32 ctrl; | |
1343 | ||
1344 | state = enable ? DP_SSS_PWR_ON(pipe) : DP_SSS_PWR_GATE(pipe); | |
1345 | ||
1346 | mutex_lock(&dev_priv->rps.hw_lock); | |
1347 | ||
1348 | #define COND \ | |
1349 | ((vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) & DP_SSS_MASK(pipe)) == state) | |
1350 | ||
1351 | if (COND) | |
1352 | goto out; | |
1353 | ||
1354 | ctrl = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ); | |
1355 | ctrl &= ~DP_SSC_MASK(pipe); | |
1356 | ctrl |= enable ? DP_SSC_PWR_ON(pipe) : DP_SSC_PWR_GATE(pipe); | |
1357 | vlv_punit_write(dev_priv, PUNIT_REG_DSPFREQ, ctrl); | |
1358 | ||
1359 | if (wait_for(COND, 100)) | |
7e35ab88 | 1360 | DRM_ERROR("timeout setting power well state %08x (%08x)\n", |
9c065a7d DV |
1361 | state, |
1362 | vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ)); | |
1363 | ||
1364 | #undef COND | |
1365 | ||
1366 | out: | |
1367 | mutex_unlock(&dev_priv->rps.hw_lock); | |
1368 | } | |
1369 | ||
1370 | static void chv_pipe_power_well_sync_hw(struct drm_i915_private *dev_priv, | |
1371 | struct i915_power_well *power_well) | |
1372 | { | |
8fcd5cd8 VS |
1373 | WARN_ON_ONCE(power_well->data != PIPE_A); |
1374 | ||
9c065a7d DV |
1375 | chv_set_pipe_power_well(dev_priv, power_well, power_well->count > 0); |
1376 | } | |
1377 | ||
1378 | static void chv_pipe_power_well_enable(struct drm_i915_private *dev_priv, | |
1379 | struct i915_power_well *power_well) | |
1380 | { | |
8fcd5cd8 | 1381 | WARN_ON_ONCE(power_well->data != PIPE_A); |
9c065a7d DV |
1382 | |
1383 | chv_set_pipe_power_well(dev_priv, power_well, true); | |
afd6275d | 1384 | |
2be7d540 | 1385 | vlv_display_power_well_init(dev_priv); |
9c065a7d DV |
1386 | } |
1387 | ||
1388 | static void chv_pipe_power_well_disable(struct drm_i915_private *dev_priv, | |
1389 | struct i915_power_well *power_well) | |
1390 | { | |
8fcd5cd8 VS |
1391 | WARN_ON_ONCE(power_well->data != PIPE_A); |
1392 | ||
2be7d540 | 1393 | vlv_display_power_well_deinit(dev_priv); |
afd6275d | 1394 | |
9c065a7d DV |
1395 | chv_set_pipe_power_well(dev_priv, power_well, false); |
1396 | } | |
1397 | ||
e4e7684f DV |
1398 | /** |
1399 | * intel_display_power_get - grab a power domain reference | |
1400 | * @dev_priv: i915 device instance | |
1401 | * @domain: power domain to reference | |
1402 | * | |
1403 | * This function grabs a power domain reference for @domain and ensures that the | |
1404 | * power domain and all its parents are powered up. Therefore users should only | |
1405 | * grab a reference to the innermost power domain they need. | |
1406 | * | |
1407 | * Any power domain reference obtained by this function must have a symmetric | |
1408 | * call to intel_display_power_put() to release the reference again. | |
1409 | */ | |
9c065a7d DV |
1410 | void intel_display_power_get(struct drm_i915_private *dev_priv, |
1411 | enum intel_display_power_domain domain) | |
1412 | { | |
1413 | struct i915_power_domains *power_domains; | |
1414 | struct i915_power_well *power_well; | |
1415 | int i; | |
1416 | ||
1417 | intel_runtime_pm_get(dev_priv); | |
1418 | ||
1419 | power_domains = &dev_priv->power_domains; | |
1420 | ||
1421 | mutex_lock(&power_domains->lock); | |
1422 | ||
1423 | for_each_power_well(i, power_well, BIT(domain), power_domains) { | |
e8ca9320 DL |
1424 | if (!power_well->count++) |
1425 | intel_power_well_enable(dev_priv, power_well); | |
9c065a7d DV |
1426 | } |
1427 | ||
1428 | power_domains->domain_use_count[domain]++; | |
1429 | ||
1430 | mutex_unlock(&power_domains->lock); | |
1431 | } | |
1432 | ||
e4e7684f DV |
1433 | /** |
1434 | * intel_display_power_put - release a power domain reference | |
1435 | * @dev_priv: i915 device instance | |
1436 | * @domain: power domain to reference | |
1437 | * | |
1438 | * This function drops the power domain reference obtained by | |
1439 | * intel_display_power_get() and might power down the corresponding hardware | |
1440 | * block right away if this is the last reference. | |
1441 | */ | |
9c065a7d DV |
1442 | void intel_display_power_put(struct drm_i915_private *dev_priv, |
1443 | enum intel_display_power_domain domain) | |
1444 | { | |
1445 | struct i915_power_domains *power_domains; | |
1446 | struct i915_power_well *power_well; | |
1447 | int i; | |
1448 | ||
1449 | power_domains = &dev_priv->power_domains; | |
1450 | ||
1451 | mutex_lock(&power_domains->lock); | |
1452 | ||
1453 | WARN_ON(!power_domains->domain_use_count[domain]); | |
1454 | power_domains->domain_use_count[domain]--; | |
1455 | ||
1456 | for_each_power_well_rev(i, power_well, BIT(domain), power_domains) { | |
1457 | WARN_ON(!power_well->count); | |
1458 | ||
dcddab3a DL |
1459 | if (!--power_well->count && i915.disable_power_well) |
1460 | intel_power_well_disable(dev_priv, power_well); | |
9c065a7d DV |
1461 | } |
1462 | ||
1463 | mutex_unlock(&power_domains->lock); | |
1464 | ||
1465 | intel_runtime_pm_put(dev_priv); | |
1466 | } | |
1467 | ||
9c065a7d DV |
1468 | #define HSW_ALWAYS_ON_POWER_DOMAINS ( \ |
1469 | BIT(POWER_DOMAIN_PIPE_A) | \ | |
1470 | BIT(POWER_DOMAIN_TRANSCODER_EDP) | \ | |
1471 | BIT(POWER_DOMAIN_PORT_DDI_A_2_LANES) | \ | |
1472 | BIT(POWER_DOMAIN_PORT_DDI_A_4_LANES) | \ | |
1473 | BIT(POWER_DOMAIN_PORT_DDI_B_2_LANES) | \ | |
1474 | BIT(POWER_DOMAIN_PORT_DDI_B_4_LANES) | \ | |
1475 | BIT(POWER_DOMAIN_PORT_DDI_C_2_LANES) | \ | |
1476 | BIT(POWER_DOMAIN_PORT_DDI_C_4_LANES) | \ | |
1477 | BIT(POWER_DOMAIN_PORT_DDI_D_2_LANES) | \ | |
1478 | BIT(POWER_DOMAIN_PORT_DDI_D_4_LANES) | \ | |
1479 | BIT(POWER_DOMAIN_PORT_CRT) | \ | |
1480 | BIT(POWER_DOMAIN_PLLS) | \ | |
1407121a S |
1481 | BIT(POWER_DOMAIN_AUX_A) | \ |
1482 | BIT(POWER_DOMAIN_AUX_B) | \ | |
1483 | BIT(POWER_DOMAIN_AUX_C) | \ | |
1484 | BIT(POWER_DOMAIN_AUX_D) | \ | |
9c065a7d DV |
1485 | BIT(POWER_DOMAIN_INIT)) |
1486 | #define HSW_DISPLAY_POWER_DOMAINS ( \ | |
1487 | (POWER_DOMAIN_MASK & ~HSW_ALWAYS_ON_POWER_DOMAINS) | \ | |
1488 | BIT(POWER_DOMAIN_INIT)) | |
1489 | ||
1490 | #define BDW_ALWAYS_ON_POWER_DOMAINS ( \ | |
1491 | HSW_ALWAYS_ON_POWER_DOMAINS | \ | |
1492 | BIT(POWER_DOMAIN_PIPE_A_PANEL_FITTER)) | |
1493 | #define BDW_DISPLAY_POWER_DOMAINS ( \ | |
1494 | (POWER_DOMAIN_MASK & ~BDW_ALWAYS_ON_POWER_DOMAINS) | \ | |
1495 | BIT(POWER_DOMAIN_INIT)) | |
1496 | ||
1497 | #define VLV_ALWAYS_ON_POWER_DOMAINS BIT(POWER_DOMAIN_INIT) | |
1498 | #define VLV_DISPLAY_POWER_DOMAINS POWER_DOMAIN_MASK | |
1499 | ||
1500 | #define VLV_DPIO_CMN_BC_POWER_DOMAINS ( \ | |
1501 | BIT(POWER_DOMAIN_PORT_DDI_B_2_LANES) | \ | |
1502 | BIT(POWER_DOMAIN_PORT_DDI_B_4_LANES) | \ | |
1503 | BIT(POWER_DOMAIN_PORT_DDI_C_2_LANES) | \ | |
1504 | BIT(POWER_DOMAIN_PORT_DDI_C_4_LANES) | \ | |
1505 | BIT(POWER_DOMAIN_PORT_CRT) | \ | |
1407121a S |
1506 | BIT(POWER_DOMAIN_AUX_B) | \ |
1507 | BIT(POWER_DOMAIN_AUX_C) | \ | |
9c065a7d DV |
1508 | BIT(POWER_DOMAIN_INIT)) |
1509 | ||
1510 | #define VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS ( \ | |
1511 | BIT(POWER_DOMAIN_PORT_DDI_B_2_LANES) | \ | |
1512 | BIT(POWER_DOMAIN_PORT_DDI_B_4_LANES) | \ | |
1407121a | 1513 | BIT(POWER_DOMAIN_AUX_B) | \ |
9c065a7d DV |
1514 | BIT(POWER_DOMAIN_INIT)) |
1515 | ||
1516 | #define VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS ( \ | |
1517 | BIT(POWER_DOMAIN_PORT_DDI_B_4_LANES) | \ | |
1407121a | 1518 | BIT(POWER_DOMAIN_AUX_B) | \ |
9c065a7d DV |
1519 | BIT(POWER_DOMAIN_INIT)) |
1520 | ||
1521 | #define VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS ( \ | |
1522 | BIT(POWER_DOMAIN_PORT_DDI_C_2_LANES) | \ | |
1523 | BIT(POWER_DOMAIN_PORT_DDI_C_4_LANES) | \ | |
1407121a | 1524 | BIT(POWER_DOMAIN_AUX_C) | \ |
9c065a7d DV |
1525 | BIT(POWER_DOMAIN_INIT)) |
1526 | ||
1527 | #define VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS ( \ | |
1528 | BIT(POWER_DOMAIN_PORT_DDI_C_4_LANES) | \ | |
1407121a | 1529 | BIT(POWER_DOMAIN_AUX_C) | \ |
9c065a7d DV |
1530 | BIT(POWER_DOMAIN_INIT)) |
1531 | ||
9c065a7d DV |
1532 | #define CHV_DPIO_CMN_BC_POWER_DOMAINS ( \ |
1533 | BIT(POWER_DOMAIN_PORT_DDI_B_2_LANES) | \ | |
1534 | BIT(POWER_DOMAIN_PORT_DDI_B_4_LANES) | \ | |
1535 | BIT(POWER_DOMAIN_PORT_DDI_C_2_LANES) | \ | |
1536 | BIT(POWER_DOMAIN_PORT_DDI_C_4_LANES) | \ | |
1407121a S |
1537 | BIT(POWER_DOMAIN_AUX_B) | \ |
1538 | BIT(POWER_DOMAIN_AUX_C) | \ | |
9c065a7d DV |
1539 | BIT(POWER_DOMAIN_INIT)) |
1540 | ||
1541 | #define CHV_DPIO_CMN_D_POWER_DOMAINS ( \ | |
1542 | BIT(POWER_DOMAIN_PORT_DDI_D_2_LANES) | \ | |
1543 | BIT(POWER_DOMAIN_PORT_DDI_D_4_LANES) | \ | |
1407121a | 1544 | BIT(POWER_DOMAIN_AUX_D) | \ |
9c065a7d DV |
1545 | BIT(POWER_DOMAIN_INIT)) |
1546 | ||
9c065a7d DV |
1547 | static const struct i915_power_well_ops i9xx_always_on_power_well_ops = { |
1548 | .sync_hw = i9xx_always_on_power_well_noop, | |
1549 | .enable = i9xx_always_on_power_well_noop, | |
1550 | .disable = i9xx_always_on_power_well_noop, | |
1551 | .is_enabled = i9xx_always_on_power_well_enabled, | |
1552 | }; | |
1553 | ||
1554 | static const struct i915_power_well_ops chv_pipe_power_well_ops = { | |
1555 | .sync_hw = chv_pipe_power_well_sync_hw, | |
1556 | .enable = chv_pipe_power_well_enable, | |
1557 | .disable = chv_pipe_power_well_disable, | |
1558 | .is_enabled = chv_pipe_power_well_enabled, | |
1559 | }; | |
1560 | ||
1561 | static const struct i915_power_well_ops chv_dpio_cmn_power_well_ops = { | |
1562 | .sync_hw = vlv_power_well_sync_hw, | |
1563 | .enable = chv_dpio_cmn_power_well_enable, | |
1564 | .disable = chv_dpio_cmn_power_well_disable, | |
1565 | .is_enabled = vlv_power_well_enabled, | |
1566 | }; | |
1567 | ||
1568 | static struct i915_power_well i9xx_always_on_power_well[] = { | |
1569 | { | |
1570 | .name = "always-on", | |
1571 | .always_on = 1, | |
1572 | .domains = POWER_DOMAIN_MASK, | |
1573 | .ops = &i9xx_always_on_power_well_ops, | |
1574 | }, | |
1575 | }; | |
1576 | ||
1577 | static const struct i915_power_well_ops hsw_power_well_ops = { | |
1578 | .sync_hw = hsw_power_well_sync_hw, | |
1579 | .enable = hsw_power_well_enable, | |
1580 | .disable = hsw_power_well_disable, | |
1581 | .is_enabled = hsw_power_well_enabled, | |
1582 | }; | |
1583 | ||
94dd5138 S |
1584 | static const struct i915_power_well_ops skl_power_well_ops = { |
1585 | .sync_hw = skl_power_well_sync_hw, | |
1586 | .enable = skl_power_well_enable, | |
1587 | .disable = skl_power_well_disable, | |
1588 | .is_enabled = skl_power_well_enabled, | |
1589 | }; | |
1590 | ||
9c065a7d DV |
1591 | static struct i915_power_well hsw_power_wells[] = { |
1592 | { | |
1593 | .name = "always-on", | |
1594 | .always_on = 1, | |
1595 | .domains = HSW_ALWAYS_ON_POWER_DOMAINS, | |
1596 | .ops = &i9xx_always_on_power_well_ops, | |
1597 | }, | |
1598 | { | |
1599 | .name = "display", | |
1600 | .domains = HSW_DISPLAY_POWER_DOMAINS, | |
1601 | .ops = &hsw_power_well_ops, | |
1602 | }, | |
1603 | }; | |
1604 | ||
1605 | static struct i915_power_well bdw_power_wells[] = { | |
1606 | { | |
1607 | .name = "always-on", | |
1608 | .always_on = 1, | |
1609 | .domains = BDW_ALWAYS_ON_POWER_DOMAINS, | |
1610 | .ops = &i9xx_always_on_power_well_ops, | |
1611 | }, | |
1612 | { | |
1613 | .name = "display", | |
1614 | .domains = BDW_DISPLAY_POWER_DOMAINS, | |
1615 | .ops = &hsw_power_well_ops, | |
1616 | }, | |
1617 | }; | |
1618 | ||
1619 | static const struct i915_power_well_ops vlv_display_power_well_ops = { | |
1620 | .sync_hw = vlv_power_well_sync_hw, | |
1621 | .enable = vlv_display_power_well_enable, | |
1622 | .disable = vlv_display_power_well_disable, | |
1623 | .is_enabled = vlv_power_well_enabled, | |
1624 | }; | |
1625 | ||
1626 | static const struct i915_power_well_ops vlv_dpio_cmn_power_well_ops = { | |
1627 | .sync_hw = vlv_power_well_sync_hw, | |
1628 | .enable = vlv_dpio_cmn_power_well_enable, | |
1629 | .disable = vlv_dpio_cmn_power_well_disable, | |
1630 | .is_enabled = vlv_power_well_enabled, | |
1631 | }; | |
1632 | ||
1633 | static const struct i915_power_well_ops vlv_dpio_power_well_ops = { | |
1634 | .sync_hw = vlv_power_well_sync_hw, | |
1635 | .enable = vlv_power_well_enable, | |
1636 | .disable = vlv_power_well_disable, | |
1637 | .is_enabled = vlv_power_well_enabled, | |
1638 | }; | |
1639 | ||
1640 | static struct i915_power_well vlv_power_wells[] = { | |
1641 | { | |
1642 | .name = "always-on", | |
1643 | .always_on = 1, | |
1644 | .domains = VLV_ALWAYS_ON_POWER_DOMAINS, | |
1645 | .ops = &i9xx_always_on_power_well_ops, | |
1646 | }, | |
1647 | { | |
1648 | .name = "display", | |
1649 | .domains = VLV_DISPLAY_POWER_DOMAINS, | |
1650 | .data = PUNIT_POWER_WELL_DISP2D, | |
1651 | .ops = &vlv_display_power_well_ops, | |
1652 | }, | |
1653 | { | |
1654 | .name = "dpio-tx-b-01", | |
1655 | .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS | | |
1656 | VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS | | |
1657 | VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS | | |
1658 | VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS, | |
1659 | .ops = &vlv_dpio_power_well_ops, | |
1660 | .data = PUNIT_POWER_WELL_DPIO_TX_B_LANES_01, | |
1661 | }, | |
1662 | { | |
1663 | .name = "dpio-tx-b-23", | |
1664 | .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS | | |
1665 | VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS | | |
1666 | VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS | | |
1667 | VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS, | |
1668 | .ops = &vlv_dpio_power_well_ops, | |
1669 | .data = PUNIT_POWER_WELL_DPIO_TX_B_LANES_23, | |
1670 | }, | |
1671 | { | |
1672 | .name = "dpio-tx-c-01", | |
1673 | .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS | | |
1674 | VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS | | |
1675 | VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS | | |
1676 | VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS, | |
1677 | .ops = &vlv_dpio_power_well_ops, | |
1678 | .data = PUNIT_POWER_WELL_DPIO_TX_C_LANES_01, | |
1679 | }, | |
1680 | { | |
1681 | .name = "dpio-tx-c-23", | |
1682 | .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS | | |
1683 | VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS | | |
1684 | VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS | | |
1685 | VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS, | |
1686 | .ops = &vlv_dpio_power_well_ops, | |
1687 | .data = PUNIT_POWER_WELL_DPIO_TX_C_LANES_23, | |
1688 | }, | |
1689 | { | |
1690 | .name = "dpio-common", | |
1691 | .domains = VLV_DPIO_CMN_BC_POWER_DOMAINS, | |
1692 | .data = PUNIT_POWER_WELL_DPIO_CMN_BC, | |
1693 | .ops = &vlv_dpio_cmn_power_well_ops, | |
1694 | }, | |
1695 | }; | |
1696 | ||
1697 | static struct i915_power_well chv_power_wells[] = { | |
1698 | { | |
1699 | .name = "always-on", | |
1700 | .always_on = 1, | |
1701 | .domains = VLV_ALWAYS_ON_POWER_DOMAINS, | |
1702 | .ops = &i9xx_always_on_power_well_ops, | |
1703 | }, | |
9c065a7d DV |
1704 | { |
1705 | .name = "display", | |
baa4e575 | 1706 | /* |
fde61e4b VS |
1707 | * Pipe A power well is the new disp2d well. Pipe B and C |
1708 | * power wells don't actually exist. Pipe A power well is | |
1709 | * required for any pipe to work. | |
baa4e575 | 1710 | */ |
fde61e4b | 1711 | .domains = VLV_DISPLAY_POWER_DOMAINS, |
9c065a7d DV |
1712 | .data = PIPE_A, |
1713 | .ops = &chv_pipe_power_well_ops, | |
1714 | }, | |
9c065a7d DV |
1715 | { |
1716 | .name = "dpio-common-bc", | |
71849b67 | 1717 | .domains = CHV_DPIO_CMN_BC_POWER_DOMAINS, |
9c065a7d DV |
1718 | .data = PUNIT_POWER_WELL_DPIO_CMN_BC, |
1719 | .ops = &chv_dpio_cmn_power_well_ops, | |
1720 | }, | |
1721 | { | |
1722 | .name = "dpio-common-d", | |
71849b67 | 1723 | .domains = CHV_DPIO_CMN_D_POWER_DOMAINS, |
9c065a7d DV |
1724 | .data = PUNIT_POWER_WELL_DPIO_CMN_D, |
1725 | .ops = &chv_dpio_cmn_power_well_ops, | |
1726 | }, | |
9c065a7d DV |
1727 | }; |
1728 | ||
5aefb239 SS |
1729 | bool intel_display_power_well_is_enabled(struct drm_i915_private *dev_priv, |
1730 | int power_well_id) | |
1731 | { | |
1732 | struct i915_power_well *power_well; | |
1733 | bool ret; | |
1734 | ||
1735 | power_well = lookup_power_well(dev_priv, power_well_id); | |
1736 | ret = power_well->ops->is_enabled(dev_priv, power_well); | |
1737 | ||
1738 | return ret; | |
1739 | } | |
1740 | ||
94dd5138 S |
1741 | static struct i915_power_well skl_power_wells[] = { |
1742 | { | |
1743 | .name = "always-on", | |
1744 | .always_on = 1, | |
1745 | .domains = SKL_DISPLAY_ALWAYS_ON_POWER_DOMAINS, | |
1746 | .ops = &i9xx_always_on_power_well_ops, | |
1747 | }, | |
1748 | { | |
1749 | .name = "power well 1", | |
1750 | .domains = SKL_DISPLAY_POWERWELL_1_POWER_DOMAINS, | |
1751 | .ops = &skl_power_well_ops, | |
1752 | .data = SKL_DISP_PW_1, | |
1753 | }, | |
1754 | { | |
1755 | .name = "MISC IO power well", | |
1756 | .domains = SKL_DISPLAY_MISC_IO_POWER_DOMAINS, | |
1757 | .ops = &skl_power_well_ops, | |
1758 | .data = SKL_DISP_PW_MISC_IO, | |
1759 | }, | |
1760 | { | |
1761 | .name = "power well 2", | |
1762 | .domains = SKL_DISPLAY_POWERWELL_2_POWER_DOMAINS, | |
1763 | .ops = &skl_power_well_ops, | |
1764 | .data = SKL_DISP_PW_2, | |
1765 | }, | |
1766 | { | |
1767 | .name = "DDI A/E power well", | |
1768 | .domains = SKL_DISPLAY_DDI_A_E_POWER_DOMAINS, | |
1769 | .ops = &skl_power_well_ops, | |
1770 | .data = SKL_DISP_PW_DDI_A_E, | |
1771 | }, | |
1772 | { | |
1773 | .name = "DDI B power well", | |
1774 | .domains = SKL_DISPLAY_DDI_B_POWER_DOMAINS, | |
1775 | .ops = &skl_power_well_ops, | |
1776 | .data = SKL_DISP_PW_DDI_B, | |
1777 | }, | |
1778 | { | |
1779 | .name = "DDI C power well", | |
1780 | .domains = SKL_DISPLAY_DDI_C_POWER_DOMAINS, | |
1781 | .ops = &skl_power_well_ops, | |
1782 | .data = SKL_DISP_PW_DDI_C, | |
1783 | }, | |
1784 | { | |
1785 | .name = "DDI D power well", | |
1786 | .domains = SKL_DISPLAY_DDI_D_POWER_DOMAINS, | |
1787 | .ops = &skl_power_well_ops, | |
1788 | .data = SKL_DISP_PW_DDI_D, | |
1789 | }, | |
1790 | }; | |
1791 | ||
0b4a2a36 S |
1792 | static struct i915_power_well bxt_power_wells[] = { |
1793 | { | |
1794 | .name = "always-on", | |
1795 | .always_on = 1, | |
1796 | .domains = BXT_DISPLAY_ALWAYS_ON_POWER_DOMAINS, | |
1797 | .ops = &i9xx_always_on_power_well_ops, | |
1798 | }, | |
1799 | { | |
1800 | .name = "power well 1", | |
1801 | .domains = BXT_DISPLAY_POWERWELL_1_POWER_DOMAINS, | |
1802 | .ops = &skl_power_well_ops, | |
1803 | .data = SKL_DISP_PW_1, | |
1804 | }, | |
1805 | { | |
1806 | .name = "power well 2", | |
1807 | .domains = BXT_DISPLAY_POWERWELL_2_POWER_DOMAINS, | |
1808 | .ops = &skl_power_well_ops, | |
1809 | .data = SKL_DISP_PW_2, | |
1810 | } | |
1811 | }; | |
1812 | ||
9c065a7d DV |
1813 | #define set_power_wells(power_domains, __power_wells) ({ \ |
1814 | (power_domains)->power_wells = (__power_wells); \ | |
1815 | (power_domains)->power_well_count = ARRAY_SIZE(__power_wells); \ | |
1816 | }) | |
1817 | ||
e4e7684f DV |
1818 | /** |
1819 | * intel_power_domains_init - initializes the power domain structures | |
1820 | * @dev_priv: i915 device instance | |
1821 | * | |
1822 | * Initializes the power domain structures for @dev_priv depending upon the | |
1823 | * supported platform. | |
1824 | */ | |
9c065a7d DV |
1825 | int intel_power_domains_init(struct drm_i915_private *dev_priv) |
1826 | { | |
1827 | struct i915_power_domains *power_domains = &dev_priv->power_domains; | |
1828 | ||
1829 | mutex_init(&power_domains->lock); | |
1830 | ||
1831 | /* | |
1832 | * The enabling order will be from lower to higher indexed wells, | |
1833 | * the disabling order is reversed. | |
1834 | */ | |
1835 | if (IS_HASWELL(dev_priv->dev)) { | |
1836 | set_power_wells(power_domains, hsw_power_wells); | |
9c065a7d DV |
1837 | } else if (IS_BROADWELL(dev_priv->dev)) { |
1838 | set_power_wells(power_domains, bdw_power_wells); | |
94dd5138 S |
1839 | } else if (IS_SKYLAKE(dev_priv->dev)) { |
1840 | set_power_wells(power_domains, skl_power_wells); | |
0b4a2a36 S |
1841 | } else if (IS_BROXTON(dev_priv->dev)) { |
1842 | set_power_wells(power_domains, bxt_power_wells); | |
9c065a7d DV |
1843 | } else if (IS_CHERRYVIEW(dev_priv->dev)) { |
1844 | set_power_wells(power_domains, chv_power_wells); | |
1845 | } else if (IS_VALLEYVIEW(dev_priv->dev)) { | |
1846 | set_power_wells(power_domains, vlv_power_wells); | |
1847 | } else { | |
1848 | set_power_wells(power_domains, i9xx_always_on_power_well); | |
1849 | } | |
1850 | ||
1851 | return 0; | |
1852 | } | |
1853 | ||
41373cd5 DV |
1854 | static void intel_runtime_pm_disable(struct drm_i915_private *dev_priv) |
1855 | { | |
1856 | struct drm_device *dev = dev_priv->dev; | |
1857 | struct device *device = &dev->pdev->dev; | |
1858 | ||
1859 | if (!HAS_RUNTIME_PM(dev)) | |
1860 | return; | |
1861 | ||
1862 | if (!intel_enable_rc6(dev)) | |
1863 | return; | |
1864 | ||
1865 | /* Make sure we're not suspended first. */ | |
1866 | pm_runtime_get_sync(device); | |
41373cd5 DV |
1867 | } |
1868 | ||
e4e7684f DV |
1869 | /** |
1870 | * intel_power_domains_fini - finalizes the power domain structures | |
1871 | * @dev_priv: i915 device instance | |
1872 | * | |
1873 | * Finalizes the power domain structures for @dev_priv depending upon the | |
1874 | * supported platform. This function also disables runtime pm and ensures that | |
1875 | * the device stays powered up so that the driver can be reloaded. | |
1876 | */ | |
f458ebbc | 1877 | void intel_power_domains_fini(struct drm_i915_private *dev_priv) |
9c065a7d | 1878 | { |
41373cd5 DV |
1879 | intel_runtime_pm_disable(dev_priv); |
1880 | ||
f458ebbc DV |
1881 | /* The i915.ko module is still not prepared to be loaded when |
1882 | * the power well is not enabled, so just enable it in case | |
1883 | * we're going to unload/reload. */ | |
1884 | intel_display_set_init_power(dev_priv, true); | |
9c065a7d DV |
1885 | } |
1886 | ||
1887 | static void intel_power_domains_resume(struct drm_i915_private *dev_priv) | |
1888 | { | |
1889 | struct i915_power_domains *power_domains = &dev_priv->power_domains; | |
1890 | struct i915_power_well *power_well; | |
1891 | int i; | |
1892 | ||
1893 | mutex_lock(&power_domains->lock); | |
1894 | for_each_power_well(i, power_well, POWER_DOMAIN_MASK, power_domains) { | |
1895 | power_well->ops->sync_hw(dev_priv, power_well); | |
1896 | power_well->hw_enabled = power_well->ops->is_enabled(dev_priv, | |
1897 | power_well); | |
1898 | } | |
1899 | mutex_unlock(&power_domains->lock); | |
1900 | } | |
1901 | ||
70722468 VS |
1902 | static void chv_phy_control_init(struct drm_i915_private *dev_priv) |
1903 | { | |
1904 | struct i915_power_well *cmn_bc = | |
1905 | lookup_power_well(dev_priv, PUNIT_POWER_WELL_DPIO_CMN_BC); | |
1906 | struct i915_power_well *cmn_d = | |
1907 | lookup_power_well(dev_priv, PUNIT_POWER_WELL_DPIO_CMN_D); | |
1908 | ||
1909 | /* | |
1910 | * DISPLAY_PHY_CONTROL can get corrupted if read. As a | |
1911 | * workaround never ever read DISPLAY_PHY_CONTROL, and | |
1912 | * instead maintain a shadow copy ourselves. Use the actual | |
e0fce78f VS |
1913 | * power well state and lane status to reconstruct the |
1914 | * expected initial value. | |
70722468 VS |
1915 | */ |
1916 | dev_priv->chv_phy_control = | |
bc284542 VS |
1917 | PHY_LDO_SEQ_DELAY(PHY_LDO_DELAY_600NS, DPIO_PHY0) | |
1918 | PHY_LDO_SEQ_DELAY(PHY_LDO_DELAY_600NS, DPIO_PHY1) | | |
e0fce78f VS |
1919 | PHY_CH_POWER_MODE(PHY_CH_DEEP_PSR, DPIO_PHY0, DPIO_CH0) | |
1920 | PHY_CH_POWER_MODE(PHY_CH_DEEP_PSR, DPIO_PHY0, DPIO_CH1) | | |
1921 | PHY_CH_POWER_MODE(PHY_CH_DEEP_PSR, DPIO_PHY1, DPIO_CH0); | |
1922 | ||
1923 | /* | |
1924 | * If all lanes are disabled we leave the override disabled | |
1925 | * with all power down bits cleared to match the state we | |
1926 | * would use after disabling the port. Otherwise enable the | |
1927 | * override and set the lane powerdown bits accding to the | |
1928 | * current lane status. | |
1929 | */ | |
1930 | if (cmn_bc->ops->is_enabled(dev_priv, cmn_bc)) { | |
1931 | uint32_t status = I915_READ(DPLL(PIPE_A)); | |
1932 | unsigned int mask; | |
1933 | ||
1934 | mask = status & DPLL_PORTB_READY_MASK; | |
1935 | if (mask == 0xf) | |
1936 | mask = 0x0; | |
1937 | else | |
1938 | dev_priv->chv_phy_control |= | |
1939 | PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH0); | |
1940 | ||
1941 | dev_priv->chv_phy_control |= | |
1942 | PHY_CH_POWER_DOWN_OVRD(mask, DPIO_PHY0, DPIO_CH0); | |
1943 | ||
1944 | mask = (status & DPLL_PORTC_READY_MASK) >> 4; | |
1945 | if (mask == 0xf) | |
1946 | mask = 0x0; | |
1947 | else | |
1948 | dev_priv->chv_phy_control |= | |
1949 | PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH1); | |
1950 | ||
1951 | dev_priv->chv_phy_control |= | |
1952 | PHY_CH_POWER_DOWN_OVRD(mask, DPIO_PHY0, DPIO_CH1); | |
1953 | ||
70722468 | 1954 | dev_priv->chv_phy_control |= PHY_COM_LANE_RESET_DEASSERT(DPIO_PHY0); |
3be60de9 VS |
1955 | |
1956 | dev_priv->chv_phy_assert[DPIO_PHY0] = false; | |
1957 | } else { | |
1958 | dev_priv->chv_phy_assert[DPIO_PHY0] = true; | |
e0fce78f VS |
1959 | } |
1960 | ||
1961 | if (cmn_d->ops->is_enabled(dev_priv, cmn_d)) { | |
1962 | uint32_t status = I915_READ(DPIO_PHY_STATUS); | |
1963 | unsigned int mask; | |
1964 | ||
1965 | mask = status & DPLL_PORTD_READY_MASK; | |
1966 | ||
1967 | if (mask == 0xf) | |
1968 | mask = 0x0; | |
1969 | else | |
1970 | dev_priv->chv_phy_control |= | |
1971 | PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY1, DPIO_CH0); | |
1972 | ||
1973 | dev_priv->chv_phy_control |= | |
1974 | PHY_CH_POWER_DOWN_OVRD(mask, DPIO_PHY1, DPIO_CH0); | |
1975 | ||
70722468 | 1976 | dev_priv->chv_phy_control |= PHY_COM_LANE_RESET_DEASSERT(DPIO_PHY1); |
3be60de9 VS |
1977 | |
1978 | dev_priv->chv_phy_assert[DPIO_PHY1] = false; | |
1979 | } else { | |
1980 | dev_priv->chv_phy_assert[DPIO_PHY1] = true; | |
e0fce78f VS |
1981 | } |
1982 | ||
1983 | I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control); | |
1984 | ||
1985 | DRM_DEBUG_KMS("Initial PHY_CONTROL=0x%08x\n", | |
1986 | dev_priv->chv_phy_control); | |
70722468 VS |
1987 | } |
1988 | ||
9c065a7d DV |
1989 | static void vlv_cmnlane_wa(struct drm_i915_private *dev_priv) |
1990 | { | |
1991 | struct i915_power_well *cmn = | |
1992 | lookup_power_well(dev_priv, PUNIT_POWER_WELL_DPIO_CMN_BC); | |
1993 | struct i915_power_well *disp2d = | |
1994 | lookup_power_well(dev_priv, PUNIT_POWER_WELL_DISP2D); | |
1995 | ||
9c065a7d | 1996 | /* If the display might be already active skip this */ |
5d93a6e5 VS |
1997 | if (cmn->ops->is_enabled(dev_priv, cmn) && |
1998 | disp2d->ops->is_enabled(dev_priv, disp2d) && | |
9c065a7d DV |
1999 | I915_READ(DPIO_CTL) & DPIO_CMNRST) |
2000 | return; | |
2001 | ||
2002 | DRM_DEBUG_KMS("toggling display PHY side reset\n"); | |
2003 | ||
2004 | /* cmnlane needs DPLL registers */ | |
2005 | disp2d->ops->enable(dev_priv, disp2d); | |
2006 | ||
2007 | /* | |
2008 | * From VLV2A0_DP_eDP_HDMI_DPIO_driver_vbios_notes_11.docx: | |
2009 | * Need to assert and de-assert PHY SB reset by gating the | |
2010 | * common lane power, then un-gating it. | |
2011 | * Simply ungating isn't enough to reset the PHY enough to get | |
2012 | * ports and lanes running. | |
2013 | */ | |
2014 | cmn->ops->disable(dev_priv, cmn); | |
2015 | } | |
2016 | ||
e4e7684f DV |
2017 | /** |
2018 | * intel_power_domains_init_hw - initialize hardware power domain state | |
2019 | * @dev_priv: i915 device instance | |
2020 | * | |
2021 | * This function initializes the hardware power domain state and enables all | |
2022 | * power domains using intel_display_set_init_power(). | |
2023 | */ | |
9c065a7d DV |
2024 | void intel_power_domains_init_hw(struct drm_i915_private *dev_priv) |
2025 | { | |
2026 | struct drm_device *dev = dev_priv->dev; | |
2027 | struct i915_power_domains *power_domains = &dev_priv->power_domains; | |
2028 | ||
2029 | power_domains->initializing = true; | |
2030 | ||
70722468 | 2031 | if (IS_CHERRYVIEW(dev)) { |
770effb1 | 2032 | mutex_lock(&power_domains->lock); |
70722468 | 2033 | chv_phy_control_init(dev_priv); |
770effb1 | 2034 | mutex_unlock(&power_domains->lock); |
70722468 | 2035 | } else if (IS_VALLEYVIEW(dev)) { |
9c065a7d DV |
2036 | mutex_lock(&power_domains->lock); |
2037 | vlv_cmnlane_wa(dev_priv); | |
2038 | mutex_unlock(&power_domains->lock); | |
2039 | } | |
2040 | ||
2041 | /* For now, we need the power well to be always enabled. */ | |
2042 | intel_display_set_init_power(dev_priv, true); | |
2043 | intel_power_domains_resume(dev_priv); | |
2044 | power_domains->initializing = false; | |
2045 | } | |
2046 | ||
e4e7684f | 2047 | /** |
ca2b1403 | 2048 | * intel_aux_display_runtime_get - grab an auxiliary power domain reference |
e4e7684f DV |
2049 | * @dev_priv: i915 device instance |
2050 | * | |
2051 | * This function grabs a power domain reference for the auxiliary power domain | |
2052 | * (for access to the GMBUS and DP AUX blocks) and ensures that it and all its | |
2053 | * parents are powered up. Therefore users should only grab a reference to the | |
2054 | * innermost power domain they need. | |
2055 | * | |
2056 | * Any power domain reference obtained by this function must have a symmetric | |
2057 | * call to intel_aux_display_runtime_put() to release the reference again. | |
2058 | */ | |
9c065a7d DV |
2059 | void intel_aux_display_runtime_get(struct drm_i915_private *dev_priv) |
2060 | { | |
2061 | intel_runtime_pm_get(dev_priv); | |
2062 | } | |
2063 | ||
e4e7684f | 2064 | /** |
ca2b1403 | 2065 | * intel_aux_display_runtime_put - release an auxiliary power domain reference |
e4e7684f DV |
2066 | * @dev_priv: i915 device instance |
2067 | * | |
ca2b1403 | 2068 | * This function drops the auxiliary power domain reference obtained by |
e4e7684f DV |
2069 | * intel_aux_display_runtime_get() and might power down the corresponding |
2070 | * hardware block right away if this is the last reference. | |
2071 | */ | |
9c065a7d DV |
2072 | void intel_aux_display_runtime_put(struct drm_i915_private *dev_priv) |
2073 | { | |
2074 | intel_runtime_pm_put(dev_priv); | |
2075 | } | |
2076 | ||
e4e7684f DV |
2077 | /** |
2078 | * intel_runtime_pm_get - grab a runtime pm reference | |
2079 | * @dev_priv: i915 device instance | |
2080 | * | |
2081 | * This function grabs a device-level runtime pm reference (mostly used for GEM | |
2082 | * code to ensure the GTT or GT is on) and ensures that it is powered up. | |
2083 | * | |
2084 | * Any runtime pm reference obtained by this function must have a symmetric | |
2085 | * call to intel_runtime_pm_put() to release the reference again. | |
2086 | */ | |
9c065a7d DV |
2087 | void intel_runtime_pm_get(struct drm_i915_private *dev_priv) |
2088 | { | |
2089 | struct drm_device *dev = dev_priv->dev; | |
2090 | struct device *device = &dev->pdev->dev; | |
2091 | ||
2092 | if (!HAS_RUNTIME_PM(dev)) | |
2093 | return; | |
2094 | ||
2095 | pm_runtime_get_sync(device); | |
2096 | WARN(dev_priv->pm.suspended, "Device still suspended.\n"); | |
2097 | } | |
2098 | ||
e4e7684f DV |
2099 | /** |
2100 | * intel_runtime_pm_get_noresume - grab a runtime pm reference | |
2101 | * @dev_priv: i915 device instance | |
2102 | * | |
2103 | * This function grabs a device-level runtime pm reference (mostly used for GEM | |
2104 | * code to ensure the GTT or GT is on). | |
2105 | * | |
2106 | * It will _not_ power up the device but instead only check that it's powered | |
2107 | * on. Therefore it is only valid to call this functions from contexts where | |
2108 | * the device is known to be powered up and where trying to power it up would | |
2109 | * result in hilarity and deadlocks. That pretty much means only the system | |
2110 | * suspend/resume code where this is used to grab runtime pm references for | |
2111 | * delayed setup down in work items. | |
2112 | * | |
2113 | * Any runtime pm reference obtained by this function must have a symmetric | |
2114 | * call to intel_runtime_pm_put() to release the reference again. | |
2115 | */ | |
9c065a7d DV |
2116 | void intel_runtime_pm_get_noresume(struct drm_i915_private *dev_priv) |
2117 | { | |
2118 | struct drm_device *dev = dev_priv->dev; | |
2119 | struct device *device = &dev->pdev->dev; | |
2120 | ||
2121 | if (!HAS_RUNTIME_PM(dev)) | |
2122 | return; | |
2123 | ||
2124 | WARN(dev_priv->pm.suspended, "Getting nosync-ref while suspended.\n"); | |
2125 | pm_runtime_get_noresume(device); | |
2126 | } | |
2127 | ||
e4e7684f DV |
2128 | /** |
2129 | * intel_runtime_pm_put - release a runtime pm reference | |
2130 | * @dev_priv: i915 device instance | |
2131 | * | |
2132 | * This function drops the device-level runtime pm reference obtained by | |
2133 | * intel_runtime_pm_get() and might power down the corresponding | |
2134 | * hardware block right away if this is the last reference. | |
2135 | */ | |
9c065a7d DV |
2136 | void intel_runtime_pm_put(struct drm_i915_private *dev_priv) |
2137 | { | |
2138 | struct drm_device *dev = dev_priv->dev; | |
2139 | struct device *device = &dev->pdev->dev; | |
2140 | ||
2141 | if (!HAS_RUNTIME_PM(dev)) | |
2142 | return; | |
2143 | ||
2144 | pm_runtime_mark_last_busy(device); | |
2145 | pm_runtime_put_autosuspend(device); | |
2146 | } | |
2147 | ||
e4e7684f DV |
2148 | /** |
2149 | * intel_runtime_pm_enable - enable runtime pm | |
2150 | * @dev_priv: i915 device instance | |
2151 | * | |
2152 | * This function enables runtime pm at the end of the driver load sequence. | |
2153 | * | |
2154 | * Note that this function does currently not enable runtime pm for the | |
2155 | * subordinate display power domains. That is only done on the first modeset | |
2156 | * using intel_display_set_init_power(). | |
2157 | */ | |
f458ebbc | 2158 | void intel_runtime_pm_enable(struct drm_i915_private *dev_priv) |
9c065a7d DV |
2159 | { |
2160 | struct drm_device *dev = dev_priv->dev; | |
2161 | struct device *device = &dev->pdev->dev; | |
2162 | ||
2163 | if (!HAS_RUNTIME_PM(dev)) | |
2164 | return; | |
2165 | ||
9c065a7d DV |
2166 | /* |
2167 | * RPM depends on RC6 to save restore the GT HW context, so make RC6 a | |
2168 | * requirement. | |
2169 | */ | |
2170 | if (!intel_enable_rc6(dev)) { | |
2171 | DRM_INFO("RC6 disabled, disabling runtime PM support\n"); | |
2172 | return; | |
2173 | } | |
2174 | ||
2175 | pm_runtime_set_autosuspend_delay(device, 10000); /* 10s */ | |
2176 | pm_runtime_mark_last_busy(device); | |
2177 | pm_runtime_use_autosuspend(device); | |
2178 | ||
2179 | pm_runtime_put_autosuspend(device); | |
2180 | } | |
2181 |