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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 | ||
9c065a7d DV |
52 | #define for_each_power_well(i, power_well, domain_mask, power_domains) \ |
53 | for (i = 0; \ | |
54 | i < (power_domains)->power_well_count && \ | |
55 | ((power_well) = &(power_domains)->power_wells[i]); \ | |
56 | i++) \ | |
95150bdf | 57 | for_each_if ((power_well)->domains & (domain_mask)) |
9c065a7d DV |
58 | |
59 | #define for_each_power_well_rev(i, power_well, domain_mask, power_domains) \ | |
60 | for (i = (power_domains)->power_well_count - 1; \ | |
61 | i >= 0 && ((power_well) = &(power_domains)->power_wells[i]);\ | |
62 | i--) \ | |
95150bdf | 63 | for_each_if ((power_well)->domains & (domain_mask)) |
9c065a7d | 64 | |
5aefb239 SS |
65 | bool intel_display_power_well_is_enabled(struct drm_i915_private *dev_priv, |
66 | int power_well_id); | |
67 | ||
9895ad03 DS |
68 | const char * |
69 | intel_display_power_domain_str(enum intel_display_power_domain domain) | |
70 | { | |
71 | switch (domain) { | |
72 | case POWER_DOMAIN_PIPE_A: | |
73 | return "PIPE_A"; | |
74 | case POWER_DOMAIN_PIPE_B: | |
75 | return "PIPE_B"; | |
76 | case POWER_DOMAIN_PIPE_C: | |
77 | return "PIPE_C"; | |
78 | case POWER_DOMAIN_PIPE_A_PANEL_FITTER: | |
79 | return "PIPE_A_PANEL_FITTER"; | |
80 | case POWER_DOMAIN_PIPE_B_PANEL_FITTER: | |
81 | return "PIPE_B_PANEL_FITTER"; | |
82 | case POWER_DOMAIN_PIPE_C_PANEL_FITTER: | |
83 | return "PIPE_C_PANEL_FITTER"; | |
84 | case POWER_DOMAIN_TRANSCODER_A: | |
85 | return "TRANSCODER_A"; | |
86 | case POWER_DOMAIN_TRANSCODER_B: | |
87 | return "TRANSCODER_B"; | |
88 | case POWER_DOMAIN_TRANSCODER_C: | |
89 | return "TRANSCODER_C"; | |
90 | case POWER_DOMAIN_TRANSCODER_EDP: | |
91 | return "TRANSCODER_EDP"; | |
92 | case POWER_DOMAIN_PORT_DDI_A_LANES: | |
93 | return "PORT_DDI_A_LANES"; | |
94 | case POWER_DOMAIN_PORT_DDI_B_LANES: | |
95 | return "PORT_DDI_B_LANES"; | |
96 | case POWER_DOMAIN_PORT_DDI_C_LANES: | |
97 | return "PORT_DDI_C_LANES"; | |
98 | case POWER_DOMAIN_PORT_DDI_D_LANES: | |
99 | return "PORT_DDI_D_LANES"; | |
100 | case POWER_DOMAIN_PORT_DDI_E_LANES: | |
101 | return "PORT_DDI_E_LANES"; | |
102 | case POWER_DOMAIN_PORT_DSI: | |
103 | return "PORT_DSI"; | |
104 | case POWER_DOMAIN_PORT_CRT: | |
105 | return "PORT_CRT"; | |
106 | case POWER_DOMAIN_PORT_OTHER: | |
107 | return "PORT_OTHER"; | |
108 | case POWER_DOMAIN_VGA: | |
109 | return "VGA"; | |
110 | case POWER_DOMAIN_AUDIO: | |
111 | return "AUDIO"; | |
112 | case POWER_DOMAIN_PLLS: | |
113 | return "PLLS"; | |
114 | case POWER_DOMAIN_AUX_A: | |
115 | return "AUX_A"; | |
116 | case POWER_DOMAIN_AUX_B: | |
117 | return "AUX_B"; | |
118 | case POWER_DOMAIN_AUX_C: | |
119 | return "AUX_C"; | |
120 | case POWER_DOMAIN_AUX_D: | |
121 | return "AUX_D"; | |
122 | case POWER_DOMAIN_GMBUS: | |
123 | return "GMBUS"; | |
124 | case POWER_DOMAIN_INIT: | |
125 | return "INIT"; | |
126 | case POWER_DOMAIN_MODESET: | |
127 | return "MODESET"; | |
128 | default: | |
129 | MISSING_CASE(domain); | |
130 | return "?"; | |
131 | } | |
132 | } | |
133 | ||
e8ca9320 DL |
134 | static void intel_power_well_enable(struct drm_i915_private *dev_priv, |
135 | struct i915_power_well *power_well) | |
136 | { | |
137 | DRM_DEBUG_KMS("enabling %s\n", power_well->name); | |
138 | power_well->ops->enable(dev_priv, power_well); | |
139 | power_well->hw_enabled = true; | |
140 | } | |
141 | ||
dcddab3a DL |
142 | static void intel_power_well_disable(struct drm_i915_private *dev_priv, |
143 | struct i915_power_well *power_well) | |
144 | { | |
145 | DRM_DEBUG_KMS("disabling %s\n", power_well->name); | |
146 | power_well->hw_enabled = false; | |
147 | power_well->ops->disable(dev_priv, power_well); | |
148 | } | |
149 | ||
e4e7684f | 150 | /* |
9c065a7d DV |
151 | * We should only use the power well if we explicitly asked the hardware to |
152 | * enable it, so check if it's enabled and also check if we've requested it to | |
153 | * be enabled. | |
154 | */ | |
155 | static bool hsw_power_well_enabled(struct drm_i915_private *dev_priv, | |
156 | struct i915_power_well *power_well) | |
157 | { | |
158 | return I915_READ(HSW_PWR_WELL_DRIVER) == | |
159 | (HSW_PWR_WELL_ENABLE_REQUEST | HSW_PWR_WELL_STATE_ENABLED); | |
160 | } | |
161 | ||
e4e7684f DV |
162 | /** |
163 | * __intel_display_power_is_enabled - unlocked check for a power domain | |
164 | * @dev_priv: i915 device instance | |
165 | * @domain: power domain to check | |
166 | * | |
167 | * This is the unlocked version of intel_display_power_is_enabled() and should | |
168 | * only be used from error capture and recovery code where deadlocks are | |
169 | * possible. | |
170 | * | |
171 | * Returns: | |
172 | * True when the power domain is enabled, false otherwise. | |
173 | */ | |
f458ebbc DV |
174 | bool __intel_display_power_is_enabled(struct drm_i915_private *dev_priv, |
175 | enum intel_display_power_domain domain) | |
9c065a7d DV |
176 | { |
177 | struct i915_power_domains *power_domains; | |
178 | struct i915_power_well *power_well; | |
179 | bool is_enabled; | |
180 | int i; | |
181 | ||
182 | if (dev_priv->pm.suspended) | |
183 | return false; | |
184 | ||
185 | power_domains = &dev_priv->power_domains; | |
186 | ||
187 | is_enabled = true; | |
188 | ||
189 | for_each_power_well_rev(i, power_well, BIT(domain), power_domains) { | |
190 | if (power_well->always_on) | |
191 | continue; | |
192 | ||
193 | if (!power_well->hw_enabled) { | |
194 | is_enabled = false; | |
195 | break; | |
196 | } | |
197 | } | |
198 | ||
199 | return is_enabled; | |
200 | } | |
201 | ||
e4e7684f | 202 | /** |
f61ccae3 | 203 | * intel_display_power_is_enabled - check for a power domain |
e4e7684f DV |
204 | * @dev_priv: i915 device instance |
205 | * @domain: power domain to check | |
206 | * | |
207 | * This function can be used to check the hw power domain state. It is mostly | |
208 | * used in hardware state readout functions. Everywhere else code should rely | |
209 | * upon explicit power domain reference counting to ensure that the hardware | |
210 | * block is powered up before accessing it. | |
211 | * | |
212 | * Callers must hold the relevant modesetting locks to ensure that concurrent | |
213 | * threads can't disable the power well while the caller tries to read a few | |
214 | * registers. | |
215 | * | |
216 | * Returns: | |
217 | * True when the power domain is enabled, false otherwise. | |
218 | */ | |
f458ebbc DV |
219 | bool intel_display_power_is_enabled(struct drm_i915_private *dev_priv, |
220 | enum intel_display_power_domain domain) | |
9c065a7d DV |
221 | { |
222 | struct i915_power_domains *power_domains; | |
223 | bool ret; | |
224 | ||
225 | power_domains = &dev_priv->power_domains; | |
226 | ||
227 | mutex_lock(&power_domains->lock); | |
f458ebbc | 228 | ret = __intel_display_power_is_enabled(dev_priv, domain); |
9c065a7d DV |
229 | mutex_unlock(&power_domains->lock); |
230 | ||
231 | return ret; | |
232 | } | |
233 | ||
e4e7684f DV |
234 | /** |
235 | * intel_display_set_init_power - set the initial power domain state | |
236 | * @dev_priv: i915 device instance | |
237 | * @enable: whether to enable or disable the initial power domain state | |
238 | * | |
239 | * For simplicity our driver load/unload and system suspend/resume code assumes | |
240 | * that all power domains are always enabled. This functions controls the state | |
241 | * of this little hack. While the initial power domain state is enabled runtime | |
242 | * pm is effectively disabled. | |
243 | */ | |
d9bc89d9 DV |
244 | void intel_display_set_init_power(struct drm_i915_private *dev_priv, |
245 | bool enable) | |
246 | { | |
247 | if (dev_priv->power_domains.init_power_on == enable) | |
248 | return; | |
249 | ||
250 | if (enable) | |
251 | intel_display_power_get(dev_priv, POWER_DOMAIN_INIT); | |
252 | else | |
253 | intel_display_power_put(dev_priv, POWER_DOMAIN_INIT); | |
254 | ||
255 | dev_priv->power_domains.init_power_on = enable; | |
256 | } | |
257 | ||
9c065a7d DV |
258 | /* |
259 | * Starting with Haswell, we have a "Power Down Well" that can be turned off | |
260 | * when not needed anymore. We have 4 registers that can request the power well | |
261 | * to be enabled, and it will only be disabled if none of the registers is | |
262 | * requesting it to be enabled. | |
263 | */ | |
264 | static void hsw_power_well_post_enable(struct drm_i915_private *dev_priv) | |
265 | { | |
266 | struct drm_device *dev = dev_priv->dev; | |
267 | ||
268 | /* | |
269 | * After we re-enable the power well, if we touch VGA register 0x3d5 | |
270 | * we'll get unclaimed register interrupts. This stops after we write | |
271 | * anything to the VGA MSR register. The vgacon module uses this | |
272 | * register all the time, so if we unbind our driver and, as a | |
273 | * consequence, bind vgacon, we'll get stuck in an infinite loop at | |
274 | * console_unlock(). So make here we touch the VGA MSR register, making | |
275 | * sure vgacon can keep working normally without triggering interrupts | |
276 | * and error messages. | |
277 | */ | |
278 | vga_get_uninterruptible(dev->pdev, VGA_RSRC_LEGACY_IO); | |
279 | outb(inb(VGA_MSR_READ), VGA_MSR_WRITE); | |
280 | vga_put(dev->pdev, VGA_RSRC_LEGACY_IO); | |
281 | ||
25400392 | 282 | if (IS_BROADWELL(dev)) |
4c6c03be DL |
283 | gen8_irq_power_well_post_enable(dev_priv, |
284 | 1 << PIPE_C | 1 << PIPE_B); | |
9c065a7d DV |
285 | } |
286 | ||
d14c0343 DL |
287 | static void skl_power_well_post_enable(struct drm_i915_private *dev_priv, |
288 | struct i915_power_well *power_well) | |
289 | { | |
290 | struct drm_device *dev = dev_priv->dev; | |
291 | ||
292 | /* | |
293 | * After we re-enable the power well, if we touch VGA register 0x3d5 | |
294 | * we'll get unclaimed register interrupts. This stops after we write | |
295 | * anything to the VGA MSR register. The vgacon module uses this | |
296 | * register all the time, so if we unbind our driver and, as a | |
297 | * consequence, bind vgacon, we'll get stuck in an infinite loop at | |
298 | * console_unlock(). So make here we touch the VGA MSR register, making | |
299 | * sure vgacon can keep working normally without triggering interrupts | |
300 | * and error messages. | |
301 | */ | |
302 | if (power_well->data == SKL_DISP_PW_2) { | |
303 | vga_get_uninterruptible(dev->pdev, VGA_RSRC_LEGACY_IO); | |
304 | outb(inb(VGA_MSR_READ), VGA_MSR_WRITE); | |
305 | vga_put(dev->pdev, VGA_RSRC_LEGACY_IO); | |
306 | ||
307 | gen8_irq_power_well_post_enable(dev_priv, | |
308 | 1 << PIPE_C | 1 << PIPE_B); | |
309 | } | |
d14c0343 DL |
310 | } |
311 | ||
9c065a7d DV |
312 | static void hsw_set_power_well(struct drm_i915_private *dev_priv, |
313 | struct i915_power_well *power_well, bool enable) | |
314 | { | |
315 | bool is_enabled, enable_requested; | |
316 | uint32_t tmp; | |
317 | ||
318 | tmp = I915_READ(HSW_PWR_WELL_DRIVER); | |
319 | is_enabled = tmp & HSW_PWR_WELL_STATE_ENABLED; | |
320 | enable_requested = tmp & HSW_PWR_WELL_ENABLE_REQUEST; | |
321 | ||
322 | if (enable) { | |
323 | if (!enable_requested) | |
324 | I915_WRITE(HSW_PWR_WELL_DRIVER, | |
325 | HSW_PWR_WELL_ENABLE_REQUEST); | |
326 | ||
327 | if (!is_enabled) { | |
328 | DRM_DEBUG_KMS("Enabling power well\n"); | |
329 | if (wait_for((I915_READ(HSW_PWR_WELL_DRIVER) & | |
330 | HSW_PWR_WELL_STATE_ENABLED), 20)) | |
331 | DRM_ERROR("Timeout enabling power well\n"); | |
6d729bff | 332 | hsw_power_well_post_enable(dev_priv); |
9c065a7d DV |
333 | } |
334 | ||
9c065a7d DV |
335 | } else { |
336 | if (enable_requested) { | |
337 | I915_WRITE(HSW_PWR_WELL_DRIVER, 0); | |
338 | POSTING_READ(HSW_PWR_WELL_DRIVER); | |
339 | DRM_DEBUG_KMS("Requesting to disable the power well\n"); | |
340 | } | |
341 | } | |
342 | } | |
343 | ||
94dd5138 S |
344 | #define SKL_DISPLAY_POWERWELL_2_POWER_DOMAINS ( \ |
345 | BIT(POWER_DOMAIN_TRANSCODER_A) | \ | |
346 | BIT(POWER_DOMAIN_PIPE_B) | \ | |
347 | BIT(POWER_DOMAIN_TRANSCODER_B) | \ | |
348 | BIT(POWER_DOMAIN_PIPE_C) | \ | |
349 | BIT(POWER_DOMAIN_TRANSCODER_C) | \ | |
350 | BIT(POWER_DOMAIN_PIPE_B_PANEL_FITTER) | \ | |
351 | BIT(POWER_DOMAIN_PIPE_C_PANEL_FITTER) | \ | |
6331a704 PJ |
352 | BIT(POWER_DOMAIN_PORT_DDI_B_LANES) | \ |
353 | BIT(POWER_DOMAIN_PORT_DDI_C_LANES) | \ | |
354 | BIT(POWER_DOMAIN_PORT_DDI_D_LANES) | \ | |
355 | BIT(POWER_DOMAIN_PORT_DDI_E_LANES) | \ | |
94dd5138 S |
356 | BIT(POWER_DOMAIN_AUX_B) | \ |
357 | BIT(POWER_DOMAIN_AUX_C) | \ | |
358 | BIT(POWER_DOMAIN_AUX_D) | \ | |
359 | BIT(POWER_DOMAIN_AUDIO) | \ | |
360 | BIT(POWER_DOMAIN_VGA) | \ | |
361 | BIT(POWER_DOMAIN_INIT)) | |
94dd5138 | 362 | #define SKL_DISPLAY_DDI_A_E_POWER_DOMAINS ( \ |
6331a704 PJ |
363 | BIT(POWER_DOMAIN_PORT_DDI_A_LANES) | \ |
364 | BIT(POWER_DOMAIN_PORT_DDI_E_LANES) | \ | |
94dd5138 S |
365 | BIT(POWER_DOMAIN_INIT)) |
366 | #define SKL_DISPLAY_DDI_B_POWER_DOMAINS ( \ | |
6331a704 | 367 | BIT(POWER_DOMAIN_PORT_DDI_B_LANES) | \ |
94dd5138 S |
368 | BIT(POWER_DOMAIN_INIT)) |
369 | #define SKL_DISPLAY_DDI_C_POWER_DOMAINS ( \ | |
6331a704 | 370 | BIT(POWER_DOMAIN_PORT_DDI_C_LANES) | \ |
94dd5138 S |
371 | BIT(POWER_DOMAIN_INIT)) |
372 | #define SKL_DISPLAY_DDI_D_POWER_DOMAINS ( \ | |
6331a704 | 373 | BIT(POWER_DOMAIN_PORT_DDI_D_LANES) | \ |
94dd5138 | 374 | BIT(POWER_DOMAIN_INIT)) |
9f836f90 PJ |
375 | #define SKL_DISPLAY_DC_OFF_POWER_DOMAINS ( \ |
376 | SKL_DISPLAY_POWERWELL_2_POWER_DOMAINS | \ | |
377 | BIT(POWER_DOMAIN_MODESET) | \ | |
378 | BIT(POWER_DOMAIN_AUX_A) | \ | |
379 | BIT(POWER_DOMAIN_INIT)) | |
94dd5138 | 380 | #define SKL_DISPLAY_ALWAYS_ON_POWER_DOMAINS ( \ |
4a76f295 | 381 | (POWER_DOMAIN_MASK & ~( \ |
9f836f90 PJ |
382 | SKL_DISPLAY_POWERWELL_2_POWER_DOMAINS | \ |
383 | SKL_DISPLAY_DC_OFF_POWER_DOMAINS)) | \ | |
94dd5138 S |
384 | BIT(POWER_DOMAIN_INIT)) |
385 | ||
0b4a2a36 S |
386 | #define BXT_DISPLAY_POWERWELL_2_POWER_DOMAINS ( \ |
387 | BIT(POWER_DOMAIN_TRANSCODER_A) | \ | |
388 | BIT(POWER_DOMAIN_PIPE_B) | \ | |
389 | BIT(POWER_DOMAIN_TRANSCODER_B) | \ | |
390 | BIT(POWER_DOMAIN_PIPE_C) | \ | |
391 | BIT(POWER_DOMAIN_TRANSCODER_C) | \ | |
392 | BIT(POWER_DOMAIN_PIPE_B_PANEL_FITTER) | \ | |
393 | BIT(POWER_DOMAIN_PIPE_C_PANEL_FITTER) | \ | |
6331a704 PJ |
394 | BIT(POWER_DOMAIN_PORT_DDI_B_LANES) | \ |
395 | BIT(POWER_DOMAIN_PORT_DDI_C_LANES) | \ | |
0b4a2a36 S |
396 | BIT(POWER_DOMAIN_AUX_B) | \ |
397 | BIT(POWER_DOMAIN_AUX_C) | \ | |
398 | BIT(POWER_DOMAIN_AUDIO) | \ | |
399 | BIT(POWER_DOMAIN_VGA) | \ | |
f0ab43e6 | 400 | BIT(POWER_DOMAIN_GMBUS) | \ |
0b4a2a36 S |
401 | BIT(POWER_DOMAIN_INIT)) |
402 | #define BXT_DISPLAY_POWERWELL_1_POWER_DOMAINS ( \ | |
403 | BXT_DISPLAY_POWERWELL_2_POWER_DOMAINS | \ | |
404 | BIT(POWER_DOMAIN_PIPE_A) | \ | |
405 | BIT(POWER_DOMAIN_TRANSCODER_EDP) | \ | |
406 | BIT(POWER_DOMAIN_PIPE_A_PANEL_FITTER) | \ | |
6331a704 | 407 | BIT(POWER_DOMAIN_PORT_DDI_A_LANES) | \ |
0b4a2a36 S |
408 | BIT(POWER_DOMAIN_AUX_A) | \ |
409 | BIT(POWER_DOMAIN_PLLS) | \ | |
410 | BIT(POWER_DOMAIN_INIT)) | |
9f836f90 PJ |
411 | #define BXT_DISPLAY_DC_OFF_POWER_DOMAINS ( \ |
412 | BXT_DISPLAY_POWERWELL_2_POWER_DOMAINS | \ | |
413 | BIT(POWER_DOMAIN_MODESET) | \ | |
414 | BIT(POWER_DOMAIN_AUX_A) | \ | |
415 | BIT(POWER_DOMAIN_INIT)) | |
0b4a2a36 S |
416 | #define BXT_DISPLAY_ALWAYS_ON_POWER_DOMAINS ( \ |
417 | (POWER_DOMAIN_MASK & ~(BXT_DISPLAY_POWERWELL_1_POWER_DOMAINS | \ | |
418 | BXT_DISPLAY_POWERWELL_2_POWER_DOMAINS)) | \ | |
419 | BIT(POWER_DOMAIN_INIT)) | |
420 | ||
664326f8 SK |
421 | static void assert_can_enable_dc9(struct drm_i915_private *dev_priv) |
422 | { | |
423 | struct drm_device *dev = dev_priv->dev; | |
424 | ||
425 | WARN(!IS_BROXTON(dev), "Platform doesn't support DC9.\n"); | |
426 | WARN((I915_READ(DC_STATE_EN) & DC_STATE_EN_DC9), | |
427 | "DC9 already programmed to be enabled.\n"); | |
428 | WARN(I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC5, | |
429 | "DC5 still not disabled to enable DC9.\n"); | |
430 | WARN(I915_READ(HSW_PWR_WELL_DRIVER), "Power well on.\n"); | |
431 | WARN(intel_irqs_enabled(dev_priv), "Interrupts not disabled yet.\n"); | |
432 | ||
433 | /* | |
434 | * TODO: check for the following to verify the conditions to enter DC9 | |
435 | * state are satisfied: | |
436 | * 1] Check relevant display engine registers to verify if mode set | |
437 | * disable sequence was followed. | |
438 | * 2] Check if display uninitialize sequence is initialized. | |
439 | */ | |
440 | } | |
441 | ||
442 | static void assert_can_disable_dc9(struct drm_i915_private *dev_priv) | |
443 | { | |
444 | WARN(intel_irqs_enabled(dev_priv), "Interrupts not disabled yet.\n"); | |
445 | WARN(!(I915_READ(DC_STATE_EN) & DC_STATE_EN_DC9), | |
446 | "DC9 already programmed to be disabled.\n"); | |
447 | WARN(I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC5, | |
448 | "DC5 still not disabled.\n"); | |
449 | ||
450 | /* | |
451 | * TODO: check for the following to verify DC9 state was indeed | |
452 | * entered before programming to disable it: | |
453 | * 1] Check relevant display engine registers to verify if mode | |
454 | * set disable sequence was followed. | |
455 | * 2] Check if display uninitialize sequence is initialized. | |
456 | */ | |
457 | } | |
458 | ||
5b076889 | 459 | static void gen9_set_dc_state_debugmask(struct drm_i915_private *dev_priv) |
4deccbb2 | 460 | { |
5b076889 MK |
461 | uint32_t val, mask; |
462 | ||
463 | mask = DC_STATE_DEBUG_MASK_MEMORY_UP; | |
464 | ||
465 | if (IS_BROXTON(dev_priv)) | |
466 | mask |= DC_STATE_DEBUG_MASK_CORES; | |
4deccbb2 PJ |
467 | |
468 | /* The below bit doesn't need to be cleared ever afterwards */ | |
469 | val = I915_READ(DC_STATE_DEBUG); | |
5b076889 MK |
470 | if ((val & mask) != mask) { |
471 | val |= mask; | |
4deccbb2 PJ |
472 | I915_WRITE(DC_STATE_DEBUG, val); |
473 | POSTING_READ(DC_STATE_DEBUG); | |
474 | } | |
475 | } | |
476 | ||
779cb5d3 MK |
477 | static void gen9_write_dc_state(struct drm_i915_private *dev_priv, |
478 | u32 state) | |
479 | { | |
480 | int rewrites = 0; | |
481 | int rereads = 0; | |
482 | u32 v; | |
483 | ||
484 | I915_WRITE(DC_STATE_EN, state); | |
485 | ||
486 | /* It has been observed that disabling the dc6 state sometimes | |
487 | * doesn't stick and dmc keeps returning old value. Make sure | |
488 | * the write really sticks enough times and also force rewrite until | |
489 | * we are confident that state is exactly what we want. | |
490 | */ | |
491 | do { | |
492 | v = I915_READ(DC_STATE_EN); | |
493 | ||
494 | if (v != state) { | |
495 | I915_WRITE(DC_STATE_EN, state); | |
496 | rewrites++; | |
497 | rereads = 0; | |
498 | } else if (rereads++ > 5) { | |
499 | break; | |
500 | } | |
501 | ||
502 | } while (rewrites < 100); | |
503 | ||
504 | if (v != state) | |
505 | DRM_ERROR("Writing dc state to 0x%x failed, now 0x%x\n", | |
506 | state, v); | |
507 | ||
508 | /* Most of the times we need one retry, avoid spam */ | |
509 | if (rewrites > 1) | |
510 | DRM_DEBUG_KMS("Rewrote dc state to 0x%x %d times\n", | |
511 | state, rewrites); | |
512 | } | |
513 | ||
13ae3a0d | 514 | static void gen9_set_dc_state(struct drm_i915_private *dev_priv, uint32_t state) |
664326f8 SK |
515 | { |
516 | uint32_t val; | |
13ae3a0d | 517 | uint32_t mask; |
664326f8 | 518 | |
13ae3a0d ID |
519 | mask = DC_STATE_EN_UPTO_DC5; |
520 | if (IS_BROXTON(dev_priv)) | |
521 | mask |= DC_STATE_EN_DC9; | |
522 | else | |
523 | mask |= DC_STATE_EN_UPTO_DC6; | |
664326f8 | 524 | |
13ae3a0d | 525 | WARN_ON_ONCE(state & ~mask); |
664326f8 | 526 | |
443646c7 PJ |
527 | if (i915.enable_dc == 0) |
528 | state = DC_STATE_DISABLE; | |
529 | else if (i915.enable_dc == 1 && state > DC_STATE_EN_UPTO_DC5) | |
530 | state = DC_STATE_EN_UPTO_DC5; | |
531 | ||
664326f8 | 532 | val = I915_READ(DC_STATE_EN); |
13ae3a0d ID |
533 | DRM_DEBUG_KMS("Setting DC state from %02x to %02x\n", |
534 | val & mask, state); | |
832dba88 PJ |
535 | |
536 | /* Check if DMC is ignoring our DC state requests */ | |
537 | if ((val & mask) != dev_priv->csr.dc_state) | |
538 | DRM_ERROR("DC state mismatch (0x%x -> 0x%x)\n", | |
539 | dev_priv->csr.dc_state, val & mask); | |
540 | ||
13ae3a0d ID |
541 | val &= ~mask; |
542 | val |= state; | |
779cb5d3 MK |
543 | |
544 | gen9_write_dc_state(dev_priv, val); | |
832dba88 PJ |
545 | |
546 | dev_priv->csr.dc_state = val & mask; | |
664326f8 SK |
547 | } |
548 | ||
13ae3a0d | 549 | void bxt_enable_dc9(struct drm_i915_private *dev_priv) |
664326f8 | 550 | { |
13ae3a0d ID |
551 | assert_can_enable_dc9(dev_priv); |
552 | ||
553 | DRM_DEBUG_KMS("Enabling DC9\n"); | |
664326f8 | 554 | |
13ae3a0d ID |
555 | gen9_set_dc_state(dev_priv, DC_STATE_EN_DC9); |
556 | } | |
557 | ||
558 | void bxt_disable_dc9(struct drm_i915_private *dev_priv) | |
559 | { | |
664326f8 SK |
560 | assert_can_disable_dc9(dev_priv); |
561 | ||
562 | DRM_DEBUG_KMS("Disabling DC9\n"); | |
563 | ||
13ae3a0d | 564 | gen9_set_dc_state(dev_priv, DC_STATE_DISABLE); |
664326f8 SK |
565 | } |
566 | ||
af5fead2 DV |
567 | static void assert_csr_loaded(struct drm_i915_private *dev_priv) |
568 | { | |
569 | WARN_ONCE(!I915_READ(CSR_PROGRAM(0)), | |
570 | "CSR program storage start is NULL\n"); | |
571 | WARN_ONCE(!I915_READ(CSR_SSP_BASE), "CSR SSP Base Not fine\n"); | |
572 | WARN_ONCE(!I915_READ(CSR_HTP_SKL), "CSR HTP Not fine\n"); | |
573 | } | |
574 | ||
5aefb239 | 575 | static void assert_can_enable_dc5(struct drm_i915_private *dev_priv) |
dc174300 | 576 | { |
6b457d31 | 577 | struct drm_device *dev = dev_priv->dev; |
5aefb239 SS |
578 | bool pg2_enabled = intel_display_power_well_is_enabled(dev_priv, |
579 | SKL_DISP_PW_2); | |
580 | ||
8d7a1c4a RV |
581 | WARN_ONCE(!IS_SKYLAKE(dev) && !IS_KABYLAKE(dev), |
582 | "Platform doesn't support DC5.\n"); | |
6ff8ab0d JB |
583 | WARN_ONCE(!HAS_RUNTIME_PM(dev), "Runtime PM not enabled.\n"); |
584 | WARN_ONCE(pg2_enabled, "PG2 not disabled to enable DC5.\n"); | |
5aefb239 | 585 | |
6ff8ab0d JB |
586 | WARN_ONCE((I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC5), |
587 | "DC5 already programmed to be enabled.\n"); | |
c9b8846a | 588 | assert_rpm_wakelock_held(dev_priv); |
5aefb239 SS |
589 | |
590 | assert_csr_loaded(dev_priv); | |
591 | } | |
592 | ||
593 | static void assert_can_disable_dc5(struct drm_i915_private *dev_priv) | |
594 | { | |
93c7cb6c SS |
595 | /* |
596 | * During initialization, the firmware may not be loaded yet. | |
597 | * We still want to make sure that the DC enabling flag is cleared. | |
598 | */ | |
599 | if (dev_priv->power_domains.initializing) | |
600 | return; | |
5aefb239 | 601 | |
c9b8846a | 602 | assert_rpm_wakelock_held(dev_priv); |
5aefb239 SS |
603 | } |
604 | ||
605 | static void gen9_enable_dc5(struct drm_i915_private *dev_priv) | |
606 | { | |
5aefb239 | 607 | assert_can_enable_dc5(dev_priv); |
6b457d31 SK |
608 | |
609 | DRM_DEBUG_KMS("Enabling DC5\n"); | |
610 | ||
13ae3a0d | 611 | gen9_set_dc_state(dev_priv, DC_STATE_EN_UPTO_DC5); |
dc174300 SS |
612 | } |
613 | ||
93c7cb6c | 614 | static void assert_can_enable_dc6(struct drm_i915_private *dev_priv) |
f75a1985 | 615 | { |
74b4f371 | 616 | struct drm_device *dev = dev_priv->dev; |
93c7cb6c | 617 | |
8d7a1c4a RV |
618 | WARN_ONCE(!IS_SKYLAKE(dev) && !IS_KABYLAKE(dev), |
619 | "Platform doesn't support DC6.\n"); | |
6ff8ab0d JB |
620 | WARN_ONCE(!HAS_RUNTIME_PM(dev), "Runtime PM not enabled.\n"); |
621 | WARN_ONCE(I915_READ(UTIL_PIN_CTL) & UTIL_PIN_ENABLE, | |
622 | "Backlight is not disabled.\n"); | |
623 | WARN_ONCE((I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC6), | |
624 | "DC6 already programmed to be enabled.\n"); | |
93c7cb6c SS |
625 | |
626 | assert_csr_loaded(dev_priv); | |
627 | } | |
628 | ||
629 | static void assert_can_disable_dc6(struct drm_i915_private *dev_priv) | |
630 | { | |
631 | /* | |
632 | * During initialization, the firmware may not be loaded yet. | |
633 | * We still want to make sure that the DC enabling flag is cleared. | |
634 | */ | |
635 | if (dev_priv->power_domains.initializing) | |
636 | return; | |
637 | ||
6ff8ab0d JB |
638 | WARN_ONCE(!(I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC6), |
639 | "DC6 already programmed to be disabled.\n"); | |
93c7cb6c SS |
640 | } |
641 | ||
9f836f90 PJ |
642 | static void gen9_disable_dc5_dc6(struct drm_i915_private *dev_priv) |
643 | { | |
644 | assert_can_disable_dc5(dev_priv); | |
443646c7 | 645 | |
8d7a1c4a RV |
646 | if ((IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) && |
647 | i915.enable_dc != 0 && i915.enable_dc != 1) | |
443646c7 | 648 | assert_can_disable_dc6(dev_priv); |
9f836f90 PJ |
649 | |
650 | gen9_set_dc_state(dev_priv, DC_STATE_DISABLE); | |
651 | } | |
652 | ||
0a9d2bed | 653 | void skl_enable_dc6(struct drm_i915_private *dev_priv) |
93c7cb6c | 654 | { |
93c7cb6c | 655 | assert_can_enable_dc6(dev_priv); |
74b4f371 SK |
656 | |
657 | DRM_DEBUG_KMS("Enabling DC6\n"); | |
658 | ||
13ae3a0d ID |
659 | gen9_set_dc_state(dev_priv, DC_STATE_EN_UPTO_DC6); |
660 | ||
f75a1985 SS |
661 | } |
662 | ||
0a9d2bed | 663 | void skl_disable_dc6(struct drm_i915_private *dev_priv) |
f75a1985 | 664 | { |
93c7cb6c | 665 | assert_can_disable_dc6(dev_priv); |
74b4f371 SK |
666 | |
667 | DRM_DEBUG_KMS("Disabling DC6\n"); | |
668 | ||
13ae3a0d | 669 | gen9_set_dc_state(dev_priv, DC_STATE_DISABLE); |
f75a1985 SS |
670 | } |
671 | ||
94dd5138 S |
672 | static void skl_set_power_well(struct drm_i915_private *dev_priv, |
673 | struct i915_power_well *power_well, bool enable) | |
674 | { | |
675 | uint32_t tmp, fuse_status; | |
676 | uint32_t req_mask, state_mask; | |
2a51835f | 677 | bool is_enabled, enable_requested, check_fuse_status = false; |
94dd5138 S |
678 | |
679 | tmp = I915_READ(HSW_PWR_WELL_DRIVER); | |
680 | fuse_status = I915_READ(SKL_FUSE_STATUS); | |
681 | ||
682 | switch (power_well->data) { | |
683 | case SKL_DISP_PW_1: | |
684 | if (wait_for((I915_READ(SKL_FUSE_STATUS) & | |
685 | SKL_FUSE_PG0_DIST_STATUS), 1)) { | |
686 | DRM_ERROR("PG0 not enabled\n"); | |
687 | return; | |
688 | } | |
689 | break; | |
690 | case SKL_DISP_PW_2: | |
691 | if (!(fuse_status & SKL_FUSE_PG1_DIST_STATUS)) { | |
692 | DRM_ERROR("PG1 in disabled state\n"); | |
693 | return; | |
694 | } | |
695 | break; | |
696 | case SKL_DISP_PW_DDI_A_E: | |
697 | case SKL_DISP_PW_DDI_B: | |
698 | case SKL_DISP_PW_DDI_C: | |
699 | case SKL_DISP_PW_DDI_D: | |
700 | case SKL_DISP_PW_MISC_IO: | |
701 | break; | |
702 | default: | |
703 | WARN(1, "Unknown power well %lu\n", power_well->data); | |
704 | return; | |
705 | } | |
706 | ||
707 | req_mask = SKL_POWER_WELL_REQ(power_well->data); | |
2a51835f | 708 | enable_requested = tmp & req_mask; |
94dd5138 | 709 | state_mask = SKL_POWER_WELL_STATE(power_well->data); |
2a51835f | 710 | is_enabled = tmp & state_mask; |
94dd5138 S |
711 | |
712 | if (enable) { | |
2a51835f | 713 | if (!enable_requested) { |
dc174300 SS |
714 | WARN((tmp & state_mask) && |
715 | !I915_READ(HSW_PWR_WELL_BIOS), | |
716 | "Invalid for power well status to be enabled, unless done by the BIOS, \ | |
717 | when request is to disable!\n"); | |
94dd5138 | 718 | I915_WRITE(HSW_PWR_WELL_DRIVER, tmp | req_mask); |
94dd5138 S |
719 | } |
720 | ||
2a51835f | 721 | if (!is_enabled) { |
510e6fdd | 722 | DRM_DEBUG_KMS("Enabling %s\n", power_well->name); |
94dd5138 S |
723 | if (wait_for((I915_READ(HSW_PWR_WELL_DRIVER) & |
724 | state_mask), 1)) | |
725 | DRM_ERROR("%s enable timeout\n", | |
726 | power_well->name); | |
727 | check_fuse_status = true; | |
728 | } | |
729 | } else { | |
2a51835f | 730 | if (enable_requested) { |
4a76f295 ID |
731 | I915_WRITE(HSW_PWR_WELL_DRIVER, tmp & ~req_mask); |
732 | POSTING_READ(HSW_PWR_WELL_DRIVER); | |
733 | DRM_DEBUG_KMS("Disabling %s\n", power_well->name); | |
94dd5138 S |
734 | } |
735 | } | |
736 | ||
737 | if (check_fuse_status) { | |
738 | if (power_well->data == SKL_DISP_PW_1) { | |
739 | if (wait_for((I915_READ(SKL_FUSE_STATUS) & | |
740 | SKL_FUSE_PG1_DIST_STATUS), 1)) | |
741 | DRM_ERROR("PG1 distributing status timeout\n"); | |
742 | } else if (power_well->data == SKL_DISP_PW_2) { | |
743 | if (wait_for((I915_READ(SKL_FUSE_STATUS) & | |
744 | SKL_FUSE_PG2_DIST_STATUS), 1)) | |
745 | DRM_ERROR("PG2 distributing status timeout\n"); | |
746 | } | |
747 | } | |
d14c0343 DL |
748 | |
749 | if (enable && !is_enabled) | |
750 | skl_power_well_post_enable(dev_priv, power_well); | |
94dd5138 S |
751 | } |
752 | ||
9c065a7d DV |
753 | static void hsw_power_well_sync_hw(struct drm_i915_private *dev_priv, |
754 | struct i915_power_well *power_well) | |
755 | { | |
756 | hsw_set_power_well(dev_priv, power_well, power_well->count > 0); | |
757 | ||
758 | /* | |
759 | * We're taking over the BIOS, so clear any requests made by it since | |
760 | * the driver is in charge now. | |
761 | */ | |
762 | if (I915_READ(HSW_PWR_WELL_BIOS) & HSW_PWR_WELL_ENABLE_REQUEST) | |
763 | I915_WRITE(HSW_PWR_WELL_BIOS, 0); | |
764 | } | |
765 | ||
766 | static void hsw_power_well_enable(struct drm_i915_private *dev_priv, | |
767 | struct i915_power_well *power_well) | |
768 | { | |
769 | hsw_set_power_well(dev_priv, power_well, true); | |
770 | } | |
771 | ||
772 | static void hsw_power_well_disable(struct drm_i915_private *dev_priv, | |
773 | struct i915_power_well *power_well) | |
774 | { | |
775 | hsw_set_power_well(dev_priv, power_well, false); | |
776 | } | |
777 | ||
94dd5138 S |
778 | static bool skl_power_well_enabled(struct drm_i915_private *dev_priv, |
779 | struct i915_power_well *power_well) | |
780 | { | |
781 | uint32_t mask = SKL_POWER_WELL_REQ(power_well->data) | | |
782 | SKL_POWER_WELL_STATE(power_well->data); | |
783 | ||
784 | return (I915_READ(HSW_PWR_WELL_DRIVER) & mask) == mask; | |
785 | } | |
786 | ||
787 | static void skl_power_well_sync_hw(struct drm_i915_private *dev_priv, | |
788 | struct i915_power_well *power_well) | |
789 | { | |
790 | skl_set_power_well(dev_priv, power_well, power_well->count > 0); | |
791 | ||
792 | /* Clear any request made by BIOS as driver is taking over */ | |
793 | I915_WRITE(HSW_PWR_WELL_BIOS, 0); | |
794 | } | |
795 | ||
796 | static void skl_power_well_enable(struct drm_i915_private *dev_priv, | |
797 | struct i915_power_well *power_well) | |
798 | { | |
799 | skl_set_power_well(dev_priv, power_well, true); | |
800 | } | |
801 | ||
802 | static void skl_power_well_disable(struct drm_i915_private *dev_priv, | |
803 | struct i915_power_well *power_well) | |
804 | { | |
805 | skl_set_power_well(dev_priv, power_well, false); | |
806 | } | |
807 | ||
9f836f90 PJ |
808 | static bool gen9_dc_off_power_well_enabled(struct drm_i915_private *dev_priv, |
809 | struct i915_power_well *power_well) | |
810 | { | |
811 | return (I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC5_DC6_MASK) == 0; | |
812 | } | |
813 | ||
814 | static void gen9_dc_off_power_well_enable(struct drm_i915_private *dev_priv, | |
815 | struct i915_power_well *power_well) | |
816 | { | |
817 | gen9_disable_dc5_dc6(dev_priv); | |
818 | } | |
819 | ||
820 | static void gen9_dc_off_power_well_disable(struct drm_i915_private *dev_priv, | |
821 | struct i915_power_well *power_well) | |
822 | { | |
8d7a1c4a RV |
823 | if ((IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) && |
824 | i915.enable_dc != 0 && i915.enable_dc != 1) | |
9f836f90 PJ |
825 | skl_enable_dc6(dev_priv); |
826 | else | |
827 | gen9_enable_dc5(dev_priv); | |
828 | } | |
829 | ||
830 | static void gen9_dc_off_power_well_sync_hw(struct drm_i915_private *dev_priv, | |
831 | struct i915_power_well *power_well) | |
832 | { | |
833 | if (power_well->count > 0) { | |
834 | gen9_set_dc_state(dev_priv, DC_STATE_DISABLE); | |
835 | } else { | |
8d7a1c4a RV |
836 | if ((IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) && |
837 | i915.enable_dc != 0 && | |
443646c7 | 838 | i915.enable_dc != 1) |
9f836f90 PJ |
839 | gen9_set_dc_state(dev_priv, DC_STATE_EN_UPTO_DC6); |
840 | else | |
841 | gen9_set_dc_state(dev_priv, DC_STATE_EN_UPTO_DC5); | |
842 | } | |
843 | } | |
844 | ||
9c065a7d DV |
845 | static void i9xx_always_on_power_well_noop(struct drm_i915_private *dev_priv, |
846 | struct i915_power_well *power_well) | |
847 | { | |
848 | } | |
849 | ||
850 | static bool i9xx_always_on_power_well_enabled(struct drm_i915_private *dev_priv, | |
851 | struct i915_power_well *power_well) | |
852 | { | |
853 | return true; | |
854 | } | |
855 | ||
856 | static void vlv_set_power_well(struct drm_i915_private *dev_priv, | |
857 | struct i915_power_well *power_well, bool enable) | |
858 | { | |
859 | enum punit_power_well power_well_id = power_well->data; | |
860 | u32 mask; | |
861 | u32 state; | |
862 | u32 ctrl; | |
863 | ||
864 | mask = PUNIT_PWRGT_MASK(power_well_id); | |
865 | state = enable ? PUNIT_PWRGT_PWR_ON(power_well_id) : | |
866 | PUNIT_PWRGT_PWR_GATE(power_well_id); | |
867 | ||
868 | mutex_lock(&dev_priv->rps.hw_lock); | |
869 | ||
870 | #define COND \ | |
871 | ((vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_STATUS) & mask) == state) | |
872 | ||
873 | if (COND) | |
874 | goto out; | |
875 | ||
876 | ctrl = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL); | |
877 | ctrl &= ~mask; | |
878 | ctrl |= state; | |
879 | vlv_punit_write(dev_priv, PUNIT_REG_PWRGT_CTRL, ctrl); | |
880 | ||
881 | if (wait_for(COND, 100)) | |
7e35ab88 | 882 | DRM_ERROR("timeout setting power well state %08x (%08x)\n", |
9c065a7d DV |
883 | state, |
884 | vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL)); | |
885 | ||
886 | #undef COND | |
887 | ||
888 | out: | |
889 | mutex_unlock(&dev_priv->rps.hw_lock); | |
890 | } | |
891 | ||
892 | static void vlv_power_well_sync_hw(struct drm_i915_private *dev_priv, | |
893 | struct i915_power_well *power_well) | |
894 | { | |
895 | vlv_set_power_well(dev_priv, power_well, power_well->count > 0); | |
896 | } | |
897 | ||
898 | static void vlv_power_well_enable(struct drm_i915_private *dev_priv, | |
899 | struct i915_power_well *power_well) | |
900 | { | |
901 | vlv_set_power_well(dev_priv, power_well, true); | |
902 | } | |
903 | ||
904 | static void vlv_power_well_disable(struct drm_i915_private *dev_priv, | |
905 | struct i915_power_well *power_well) | |
906 | { | |
907 | vlv_set_power_well(dev_priv, power_well, false); | |
908 | } | |
909 | ||
910 | static bool vlv_power_well_enabled(struct drm_i915_private *dev_priv, | |
911 | struct i915_power_well *power_well) | |
912 | { | |
913 | int power_well_id = power_well->data; | |
914 | bool enabled = false; | |
915 | u32 mask; | |
916 | u32 state; | |
917 | u32 ctrl; | |
918 | ||
919 | mask = PUNIT_PWRGT_MASK(power_well_id); | |
920 | ctrl = PUNIT_PWRGT_PWR_ON(power_well_id); | |
921 | ||
922 | mutex_lock(&dev_priv->rps.hw_lock); | |
923 | ||
924 | state = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_STATUS) & mask; | |
925 | /* | |
926 | * We only ever set the power-on and power-gate states, anything | |
927 | * else is unexpected. | |
928 | */ | |
929 | WARN_ON(state != PUNIT_PWRGT_PWR_ON(power_well_id) && | |
930 | state != PUNIT_PWRGT_PWR_GATE(power_well_id)); | |
931 | if (state == ctrl) | |
932 | enabled = true; | |
933 | ||
934 | /* | |
935 | * A transient state at this point would mean some unexpected party | |
936 | * is poking at the power controls too. | |
937 | */ | |
938 | ctrl = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL) & mask; | |
939 | WARN_ON(ctrl != state); | |
940 | ||
941 | mutex_unlock(&dev_priv->rps.hw_lock); | |
942 | ||
943 | return enabled; | |
944 | } | |
945 | ||
2be7d540 | 946 | static void vlv_display_power_well_init(struct drm_i915_private *dev_priv) |
9c065a7d | 947 | { |
5a8fbb7d VS |
948 | enum pipe pipe; |
949 | ||
950 | /* | |
951 | * Enable the CRI clock source so we can get at the | |
952 | * display and the reference clock for VGA | |
953 | * hotplug / manual detection. Supposedly DSI also | |
954 | * needs the ref clock up and running. | |
955 | * | |
956 | * CHV DPLL B/C have some issues if VGA mode is enabled. | |
957 | */ | |
958 | for_each_pipe(dev_priv->dev, pipe) { | |
959 | u32 val = I915_READ(DPLL(pipe)); | |
960 | ||
961 | val |= DPLL_REF_CLK_ENABLE_VLV | DPLL_VGA_MODE_DIS; | |
962 | if (pipe != PIPE_A) | |
963 | val |= DPLL_INTEGRATED_CRI_CLK_VLV; | |
964 | ||
965 | I915_WRITE(DPLL(pipe), val); | |
966 | } | |
9c065a7d DV |
967 | |
968 | spin_lock_irq(&dev_priv->irq_lock); | |
969 | valleyview_enable_display_irqs(dev_priv); | |
970 | spin_unlock_irq(&dev_priv->irq_lock); | |
971 | ||
972 | /* | |
973 | * During driver initialization/resume we can avoid restoring the | |
974 | * part of the HW/SW state that will be inited anyway explicitly. | |
975 | */ | |
976 | if (dev_priv->power_domains.initializing) | |
977 | return; | |
978 | ||
b963291c | 979 | intel_hpd_init(dev_priv); |
9c065a7d DV |
980 | |
981 | i915_redisable_vga_power_on(dev_priv->dev); | |
982 | } | |
983 | ||
2be7d540 VS |
984 | static void vlv_display_power_well_deinit(struct drm_i915_private *dev_priv) |
985 | { | |
986 | spin_lock_irq(&dev_priv->irq_lock); | |
987 | valleyview_disable_display_irqs(dev_priv); | |
988 | spin_unlock_irq(&dev_priv->irq_lock); | |
989 | ||
990 | vlv_power_sequencer_reset(dev_priv); | |
991 | } | |
992 | ||
993 | static void vlv_display_power_well_enable(struct drm_i915_private *dev_priv, | |
994 | struct i915_power_well *power_well) | |
995 | { | |
996 | WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DISP2D); | |
997 | ||
998 | vlv_set_power_well(dev_priv, power_well, true); | |
999 | ||
1000 | vlv_display_power_well_init(dev_priv); | |
1001 | } | |
1002 | ||
9c065a7d DV |
1003 | static void vlv_display_power_well_disable(struct drm_i915_private *dev_priv, |
1004 | struct i915_power_well *power_well) | |
1005 | { | |
1006 | WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DISP2D); | |
1007 | ||
2be7d540 | 1008 | vlv_display_power_well_deinit(dev_priv); |
9c065a7d DV |
1009 | |
1010 | vlv_set_power_well(dev_priv, power_well, false); | |
9c065a7d DV |
1011 | } |
1012 | ||
1013 | static void vlv_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv, | |
1014 | struct i915_power_well *power_well) | |
1015 | { | |
1016 | WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DPIO_CMN_BC); | |
1017 | ||
5a8fbb7d | 1018 | /* since ref/cri clock was enabled */ |
9c065a7d DV |
1019 | udelay(1); /* >10ns for cmnreset, >0ns for sidereset */ |
1020 | ||
1021 | vlv_set_power_well(dev_priv, power_well, true); | |
1022 | ||
1023 | /* | |
1024 | * From VLV2A0_DP_eDP_DPIO_driver_vbios_notes_10.docx - | |
1025 | * 6. De-assert cmn_reset/side_reset. Same as VLV X0. | |
1026 | * a. GUnit 0x2110 bit[0] set to 1 (def 0) | |
1027 | * b. The other bits such as sfr settings / modesel may all | |
1028 | * be set to 0. | |
1029 | * | |
1030 | * This should only be done on init and resume from S3 with | |
1031 | * both PLLs disabled, or we risk losing DPIO and PLL | |
1032 | * synchronization. | |
1033 | */ | |
1034 | I915_WRITE(DPIO_CTL, I915_READ(DPIO_CTL) | DPIO_CMNRST); | |
1035 | } | |
1036 | ||
1037 | static void vlv_dpio_cmn_power_well_disable(struct drm_i915_private *dev_priv, | |
1038 | struct i915_power_well *power_well) | |
1039 | { | |
1040 | enum pipe pipe; | |
1041 | ||
1042 | WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DPIO_CMN_BC); | |
1043 | ||
1044 | for_each_pipe(dev_priv, pipe) | |
1045 | assert_pll_disabled(dev_priv, pipe); | |
1046 | ||
1047 | /* Assert common reset */ | |
1048 | I915_WRITE(DPIO_CTL, I915_READ(DPIO_CTL) & ~DPIO_CMNRST); | |
1049 | ||
1050 | vlv_set_power_well(dev_priv, power_well, false); | |
1051 | } | |
1052 | ||
30142273 VS |
1053 | #define POWER_DOMAIN_MASK (BIT(POWER_DOMAIN_NUM) - 1) |
1054 | ||
1055 | static struct i915_power_well *lookup_power_well(struct drm_i915_private *dev_priv, | |
1056 | int power_well_id) | |
1057 | { | |
1058 | struct i915_power_domains *power_domains = &dev_priv->power_domains; | |
30142273 VS |
1059 | int i; |
1060 | ||
fc17f227 ID |
1061 | for (i = 0; i < power_domains->power_well_count; i++) { |
1062 | struct i915_power_well *power_well; | |
1063 | ||
1064 | power_well = &power_domains->power_wells[i]; | |
30142273 VS |
1065 | if (power_well->data == power_well_id) |
1066 | return power_well; | |
1067 | } | |
1068 | ||
1069 | return NULL; | |
1070 | } | |
1071 | ||
1072 | #define BITS_SET(val, bits) (((val) & (bits)) == (bits)) | |
1073 | ||
1074 | static void assert_chv_phy_status(struct drm_i915_private *dev_priv) | |
1075 | { | |
1076 | struct i915_power_well *cmn_bc = | |
1077 | lookup_power_well(dev_priv, PUNIT_POWER_WELL_DPIO_CMN_BC); | |
1078 | struct i915_power_well *cmn_d = | |
1079 | lookup_power_well(dev_priv, PUNIT_POWER_WELL_DPIO_CMN_D); | |
1080 | u32 phy_control = dev_priv->chv_phy_control; | |
1081 | u32 phy_status = 0; | |
3be60de9 | 1082 | u32 phy_status_mask = 0xffffffff; |
30142273 VS |
1083 | u32 tmp; |
1084 | ||
3be60de9 VS |
1085 | /* |
1086 | * The BIOS can leave the PHY is some weird state | |
1087 | * where it doesn't fully power down some parts. | |
1088 | * Disable the asserts until the PHY has been fully | |
1089 | * reset (ie. the power well has been disabled at | |
1090 | * least once). | |
1091 | */ | |
1092 | if (!dev_priv->chv_phy_assert[DPIO_PHY0]) | |
1093 | phy_status_mask &= ~(PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH0) | | |
1094 | PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 0) | | |
1095 | PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 1) | | |
1096 | PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH1) | | |
1097 | PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 0) | | |
1098 | PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 1)); | |
1099 | ||
1100 | if (!dev_priv->chv_phy_assert[DPIO_PHY1]) | |
1101 | phy_status_mask &= ~(PHY_STATUS_CMN_LDO(DPIO_PHY1, DPIO_CH0) | | |
1102 | PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 0) | | |
1103 | PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 1)); | |
1104 | ||
30142273 VS |
1105 | if (cmn_bc->ops->is_enabled(dev_priv, cmn_bc)) { |
1106 | phy_status |= PHY_POWERGOOD(DPIO_PHY0); | |
1107 | ||
1108 | /* this assumes override is only used to enable lanes */ | |
1109 | if ((phy_control & PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH0)) == 0) | |
1110 | phy_control |= PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH0); | |
1111 | ||
1112 | if ((phy_control & PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH1)) == 0) | |
1113 | phy_control |= PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH1); | |
1114 | ||
1115 | /* CL1 is on whenever anything is on in either channel */ | |
1116 | if (BITS_SET(phy_control, | |
1117 | PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH0) | | |
1118 | PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH1))) | |
1119 | phy_status |= PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH0); | |
1120 | ||
1121 | /* | |
1122 | * The DPLLB check accounts for the pipe B + port A usage | |
1123 | * with CL2 powered up but all the lanes in the second channel | |
1124 | * powered down. | |
1125 | */ | |
1126 | if (BITS_SET(phy_control, | |
1127 | PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH1)) && | |
1128 | (I915_READ(DPLL(PIPE_B)) & DPLL_VCO_ENABLE) == 0) | |
1129 | phy_status |= PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH1); | |
1130 | ||
1131 | if (BITS_SET(phy_control, | |
1132 | PHY_CH_POWER_DOWN_OVRD(0x3, DPIO_PHY0, DPIO_CH0))) | |
1133 | phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 0); | |
1134 | if (BITS_SET(phy_control, | |
1135 | PHY_CH_POWER_DOWN_OVRD(0xc, DPIO_PHY0, DPIO_CH0))) | |
1136 | phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 1); | |
1137 | ||
1138 | if (BITS_SET(phy_control, | |
1139 | PHY_CH_POWER_DOWN_OVRD(0x3, DPIO_PHY0, DPIO_CH1))) | |
1140 | phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 0); | |
1141 | if (BITS_SET(phy_control, | |
1142 | PHY_CH_POWER_DOWN_OVRD(0xc, DPIO_PHY0, DPIO_CH1))) | |
1143 | phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 1); | |
1144 | } | |
1145 | ||
1146 | if (cmn_d->ops->is_enabled(dev_priv, cmn_d)) { | |
1147 | phy_status |= PHY_POWERGOOD(DPIO_PHY1); | |
1148 | ||
1149 | /* this assumes override is only used to enable lanes */ | |
1150 | if ((phy_control & PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY1, DPIO_CH0)) == 0) | |
1151 | phy_control |= PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY1, DPIO_CH0); | |
1152 | ||
1153 | if (BITS_SET(phy_control, | |
1154 | PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY1, DPIO_CH0))) | |
1155 | phy_status |= PHY_STATUS_CMN_LDO(DPIO_PHY1, DPIO_CH0); | |
1156 | ||
1157 | if (BITS_SET(phy_control, | |
1158 | PHY_CH_POWER_DOWN_OVRD(0x3, DPIO_PHY1, DPIO_CH0))) | |
1159 | phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 0); | |
1160 | if (BITS_SET(phy_control, | |
1161 | PHY_CH_POWER_DOWN_OVRD(0xc, DPIO_PHY1, DPIO_CH0))) | |
1162 | phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 1); | |
1163 | } | |
1164 | ||
3be60de9 VS |
1165 | phy_status &= phy_status_mask; |
1166 | ||
30142273 VS |
1167 | /* |
1168 | * The PHY may be busy with some initial calibration and whatnot, | |
1169 | * so the power state can take a while to actually change. | |
1170 | */ | |
3be60de9 | 1171 | if (wait_for((tmp = I915_READ(DISPLAY_PHY_STATUS) & phy_status_mask) == phy_status, 10)) |
30142273 VS |
1172 | WARN(phy_status != tmp, |
1173 | "Unexpected PHY_STATUS 0x%08x, expected 0x%08x (PHY_CONTROL=0x%08x)\n", | |
1174 | tmp, phy_status, dev_priv->chv_phy_control); | |
1175 | } | |
1176 | ||
1177 | #undef BITS_SET | |
1178 | ||
9c065a7d DV |
1179 | static void chv_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv, |
1180 | struct i915_power_well *power_well) | |
1181 | { | |
1182 | enum dpio_phy phy; | |
e0fce78f VS |
1183 | enum pipe pipe; |
1184 | uint32_t tmp; | |
9c065a7d DV |
1185 | |
1186 | WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DPIO_CMN_BC && | |
1187 | power_well->data != PUNIT_POWER_WELL_DPIO_CMN_D); | |
1188 | ||
e0fce78f VS |
1189 | if (power_well->data == PUNIT_POWER_WELL_DPIO_CMN_BC) { |
1190 | pipe = PIPE_A; | |
9c065a7d | 1191 | phy = DPIO_PHY0; |
e0fce78f VS |
1192 | } else { |
1193 | pipe = PIPE_C; | |
9c065a7d | 1194 | phy = DPIO_PHY1; |
e0fce78f | 1195 | } |
5a8fbb7d VS |
1196 | |
1197 | /* since ref/cri clock was enabled */ | |
9c065a7d DV |
1198 | udelay(1); /* >10ns for cmnreset, >0ns for sidereset */ |
1199 | vlv_set_power_well(dev_priv, power_well, true); | |
1200 | ||
1201 | /* Poll for phypwrgood signal */ | |
1202 | if (wait_for(I915_READ(DISPLAY_PHY_STATUS) & PHY_POWERGOOD(phy), 1)) | |
1203 | DRM_ERROR("Display PHY %d is not power up\n", phy); | |
1204 | ||
e0fce78f VS |
1205 | mutex_lock(&dev_priv->sb_lock); |
1206 | ||
1207 | /* Enable dynamic power down */ | |
1208 | tmp = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW28); | |
ee279218 VS |
1209 | tmp |= DPIO_DYNPWRDOWNEN_CH0 | DPIO_CL1POWERDOWNEN | |
1210 | DPIO_SUS_CLK_CONFIG_GATE_CLKREQ; | |
e0fce78f VS |
1211 | vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW28, tmp); |
1212 | ||
1213 | if (power_well->data == PUNIT_POWER_WELL_DPIO_CMN_BC) { | |
1214 | tmp = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW6_CH1); | |
1215 | tmp |= DPIO_DYNPWRDOWNEN_CH1; | |
1216 | vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW6_CH1, tmp); | |
3e288786 VS |
1217 | } else { |
1218 | /* | |
1219 | * Force the non-existing CL2 off. BXT does this | |
1220 | * too, so maybe it saves some power even though | |
1221 | * CL2 doesn't exist? | |
1222 | */ | |
1223 | tmp = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW30); | |
1224 | tmp |= DPIO_CL2_LDOFUSE_PWRENB; | |
1225 | vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW30, tmp); | |
e0fce78f VS |
1226 | } |
1227 | ||
1228 | mutex_unlock(&dev_priv->sb_lock); | |
1229 | ||
70722468 VS |
1230 | dev_priv->chv_phy_control |= PHY_COM_LANE_RESET_DEASSERT(phy); |
1231 | I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control); | |
e0fce78f VS |
1232 | |
1233 | DRM_DEBUG_KMS("Enabled DPIO PHY%d (PHY_CONTROL=0x%08x)\n", | |
1234 | phy, dev_priv->chv_phy_control); | |
30142273 VS |
1235 | |
1236 | assert_chv_phy_status(dev_priv); | |
9c065a7d DV |
1237 | } |
1238 | ||
1239 | static void chv_dpio_cmn_power_well_disable(struct drm_i915_private *dev_priv, | |
1240 | struct i915_power_well *power_well) | |
1241 | { | |
1242 | enum dpio_phy phy; | |
1243 | ||
1244 | WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DPIO_CMN_BC && | |
1245 | power_well->data != PUNIT_POWER_WELL_DPIO_CMN_D); | |
1246 | ||
1247 | if (power_well->data == PUNIT_POWER_WELL_DPIO_CMN_BC) { | |
1248 | phy = DPIO_PHY0; | |
1249 | assert_pll_disabled(dev_priv, PIPE_A); | |
1250 | assert_pll_disabled(dev_priv, PIPE_B); | |
1251 | } else { | |
1252 | phy = DPIO_PHY1; | |
1253 | assert_pll_disabled(dev_priv, PIPE_C); | |
1254 | } | |
1255 | ||
70722468 VS |
1256 | dev_priv->chv_phy_control &= ~PHY_COM_LANE_RESET_DEASSERT(phy); |
1257 | I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control); | |
9c065a7d DV |
1258 | |
1259 | vlv_set_power_well(dev_priv, power_well, false); | |
e0fce78f VS |
1260 | |
1261 | DRM_DEBUG_KMS("Disabled DPIO PHY%d (PHY_CONTROL=0x%08x)\n", | |
1262 | phy, dev_priv->chv_phy_control); | |
30142273 | 1263 | |
3be60de9 VS |
1264 | /* PHY is fully reset now, so we can enable the PHY state asserts */ |
1265 | dev_priv->chv_phy_assert[phy] = true; | |
1266 | ||
30142273 | 1267 | assert_chv_phy_status(dev_priv); |
e0fce78f VS |
1268 | } |
1269 | ||
6669e39f VS |
1270 | static void assert_chv_phy_powergate(struct drm_i915_private *dev_priv, enum dpio_phy phy, |
1271 | enum dpio_channel ch, bool override, unsigned int mask) | |
1272 | { | |
1273 | enum pipe pipe = phy == DPIO_PHY0 ? PIPE_A : PIPE_C; | |
1274 | u32 reg, val, expected, actual; | |
1275 | ||
3be60de9 VS |
1276 | /* |
1277 | * The BIOS can leave the PHY is some weird state | |
1278 | * where it doesn't fully power down some parts. | |
1279 | * Disable the asserts until the PHY has been fully | |
1280 | * reset (ie. the power well has been disabled at | |
1281 | * least once). | |
1282 | */ | |
1283 | if (!dev_priv->chv_phy_assert[phy]) | |
1284 | return; | |
1285 | ||
6669e39f VS |
1286 | if (ch == DPIO_CH0) |
1287 | reg = _CHV_CMN_DW0_CH0; | |
1288 | else | |
1289 | reg = _CHV_CMN_DW6_CH1; | |
1290 | ||
1291 | mutex_lock(&dev_priv->sb_lock); | |
1292 | val = vlv_dpio_read(dev_priv, pipe, reg); | |
1293 | mutex_unlock(&dev_priv->sb_lock); | |
1294 | ||
1295 | /* | |
1296 | * This assumes !override is only used when the port is disabled. | |
1297 | * All lanes should power down even without the override when | |
1298 | * the port is disabled. | |
1299 | */ | |
1300 | if (!override || mask == 0xf) { | |
1301 | expected = DPIO_ALLDL_POWERDOWN | DPIO_ANYDL_POWERDOWN; | |
1302 | /* | |
1303 | * If CH1 common lane is not active anymore | |
1304 | * (eg. for pipe B DPLL) the entire channel will | |
1305 | * shut down, which causes the common lane registers | |
1306 | * to read as 0. That means we can't actually check | |
1307 | * the lane power down status bits, but as the entire | |
1308 | * register reads as 0 it's a good indication that the | |
1309 | * channel is indeed entirely powered down. | |
1310 | */ | |
1311 | if (ch == DPIO_CH1 && val == 0) | |
1312 | expected = 0; | |
1313 | } else if (mask != 0x0) { | |
1314 | expected = DPIO_ANYDL_POWERDOWN; | |
1315 | } else { | |
1316 | expected = 0; | |
1317 | } | |
1318 | ||
1319 | if (ch == DPIO_CH0) | |
1320 | actual = val >> DPIO_ANYDL_POWERDOWN_SHIFT_CH0; | |
1321 | else | |
1322 | actual = val >> DPIO_ANYDL_POWERDOWN_SHIFT_CH1; | |
1323 | actual &= DPIO_ALLDL_POWERDOWN | DPIO_ANYDL_POWERDOWN; | |
1324 | ||
1325 | WARN(actual != expected, | |
1326 | "Unexpected DPIO lane power down: all %d, any %d. Expected: all %d, any %d. (0x%x = 0x%08x)\n", | |
1327 | !!(actual & DPIO_ALLDL_POWERDOWN), !!(actual & DPIO_ANYDL_POWERDOWN), | |
1328 | !!(expected & DPIO_ALLDL_POWERDOWN), !!(expected & DPIO_ANYDL_POWERDOWN), | |
1329 | reg, val); | |
1330 | } | |
1331 | ||
b0b33846 VS |
1332 | bool chv_phy_powergate_ch(struct drm_i915_private *dev_priv, enum dpio_phy phy, |
1333 | enum dpio_channel ch, bool override) | |
1334 | { | |
1335 | struct i915_power_domains *power_domains = &dev_priv->power_domains; | |
1336 | bool was_override; | |
1337 | ||
1338 | mutex_lock(&power_domains->lock); | |
1339 | ||
1340 | was_override = dev_priv->chv_phy_control & PHY_CH_POWER_DOWN_OVRD_EN(phy, ch); | |
1341 | ||
1342 | if (override == was_override) | |
1343 | goto out; | |
1344 | ||
1345 | if (override) | |
1346 | dev_priv->chv_phy_control |= PHY_CH_POWER_DOWN_OVRD_EN(phy, ch); | |
1347 | else | |
1348 | dev_priv->chv_phy_control &= ~PHY_CH_POWER_DOWN_OVRD_EN(phy, ch); | |
1349 | ||
1350 | I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control); | |
1351 | ||
1352 | DRM_DEBUG_KMS("Power gating DPIO PHY%d CH%d (DPIO_PHY_CONTROL=0x%08x)\n", | |
1353 | phy, ch, dev_priv->chv_phy_control); | |
1354 | ||
30142273 VS |
1355 | assert_chv_phy_status(dev_priv); |
1356 | ||
b0b33846 VS |
1357 | out: |
1358 | mutex_unlock(&power_domains->lock); | |
1359 | ||
1360 | return was_override; | |
1361 | } | |
1362 | ||
e0fce78f VS |
1363 | void chv_phy_powergate_lanes(struct intel_encoder *encoder, |
1364 | bool override, unsigned int mask) | |
1365 | { | |
1366 | struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); | |
1367 | struct i915_power_domains *power_domains = &dev_priv->power_domains; | |
1368 | enum dpio_phy phy = vlv_dport_to_phy(enc_to_dig_port(&encoder->base)); | |
1369 | enum dpio_channel ch = vlv_dport_to_channel(enc_to_dig_port(&encoder->base)); | |
1370 | ||
1371 | mutex_lock(&power_domains->lock); | |
1372 | ||
1373 | dev_priv->chv_phy_control &= ~PHY_CH_POWER_DOWN_OVRD(0xf, phy, ch); | |
1374 | dev_priv->chv_phy_control |= PHY_CH_POWER_DOWN_OVRD(mask, phy, ch); | |
1375 | ||
1376 | if (override) | |
1377 | dev_priv->chv_phy_control |= PHY_CH_POWER_DOWN_OVRD_EN(phy, ch); | |
1378 | else | |
1379 | dev_priv->chv_phy_control &= ~PHY_CH_POWER_DOWN_OVRD_EN(phy, ch); | |
1380 | ||
1381 | I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control); | |
1382 | ||
1383 | DRM_DEBUG_KMS("Power gating DPIO PHY%d CH%d lanes 0x%x (PHY_CONTROL=0x%08x)\n", | |
1384 | phy, ch, mask, dev_priv->chv_phy_control); | |
1385 | ||
30142273 VS |
1386 | assert_chv_phy_status(dev_priv); |
1387 | ||
6669e39f VS |
1388 | assert_chv_phy_powergate(dev_priv, phy, ch, override, mask); |
1389 | ||
e0fce78f | 1390 | mutex_unlock(&power_domains->lock); |
9c065a7d DV |
1391 | } |
1392 | ||
1393 | static bool chv_pipe_power_well_enabled(struct drm_i915_private *dev_priv, | |
1394 | struct i915_power_well *power_well) | |
1395 | { | |
1396 | enum pipe pipe = power_well->data; | |
1397 | bool enabled; | |
1398 | u32 state, ctrl; | |
1399 | ||
1400 | mutex_lock(&dev_priv->rps.hw_lock); | |
1401 | ||
1402 | state = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) & DP_SSS_MASK(pipe); | |
1403 | /* | |
1404 | * We only ever set the power-on and power-gate states, anything | |
1405 | * else is unexpected. | |
1406 | */ | |
1407 | WARN_ON(state != DP_SSS_PWR_ON(pipe) && state != DP_SSS_PWR_GATE(pipe)); | |
1408 | enabled = state == DP_SSS_PWR_ON(pipe); | |
1409 | ||
1410 | /* | |
1411 | * A transient state at this point would mean some unexpected party | |
1412 | * is poking at the power controls too. | |
1413 | */ | |
1414 | ctrl = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) & DP_SSC_MASK(pipe); | |
1415 | WARN_ON(ctrl << 16 != state); | |
1416 | ||
1417 | mutex_unlock(&dev_priv->rps.hw_lock); | |
1418 | ||
1419 | return enabled; | |
1420 | } | |
1421 | ||
1422 | static void chv_set_pipe_power_well(struct drm_i915_private *dev_priv, | |
1423 | struct i915_power_well *power_well, | |
1424 | bool enable) | |
1425 | { | |
1426 | enum pipe pipe = power_well->data; | |
1427 | u32 state; | |
1428 | u32 ctrl; | |
1429 | ||
1430 | state = enable ? DP_SSS_PWR_ON(pipe) : DP_SSS_PWR_GATE(pipe); | |
1431 | ||
1432 | mutex_lock(&dev_priv->rps.hw_lock); | |
1433 | ||
1434 | #define COND \ | |
1435 | ((vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) & DP_SSS_MASK(pipe)) == state) | |
1436 | ||
1437 | if (COND) | |
1438 | goto out; | |
1439 | ||
1440 | ctrl = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ); | |
1441 | ctrl &= ~DP_SSC_MASK(pipe); | |
1442 | ctrl |= enable ? DP_SSC_PWR_ON(pipe) : DP_SSC_PWR_GATE(pipe); | |
1443 | vlv_punit_write(dev_priv, PUNIT_REG_DSPFREQ, ctrl); | |
1444 | ||
1445 | if (wait_for(COND, 100)) | |
7e35ab88 | 1446 | DRM_ERROR("timeout setting power well state %08x (%08x)\n", |
9c065a7d DV |
1447 | state, |
1448 | vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ)); | |
1449 | ||
1450 | #undef COND | |
1451 | ||
1452 | out: | |
1453 | mutex_unlock(&dev_priv->rps.hw_lock); | |
1454 | } | |
1455 | ||
1456 | static void chv_pipe_power_well_sync_hw(struct drm_i915_private *dev_priv, | |
1457 | struct i915_power_well *power_well) | |
1458 | { | |
8fcd5cd8 VS |
1459 | WARN_ON_ONCE(power_well->data != PIPE_A); |
1460 | ||
9c065a7d DV |
1461 | chv_set_pipe_power_well(dev_priv, power_well, power_well->count > 0); |
1462 | } | |
1463 | ||
1464 | static void chv_pipe_power_well_enable(struct drm_i915_private *dev_priv, | |
1465 | struct i915_power_well *power_well) | |
1466 | { | |
8fcd5cd8 | 1467 | WARN_ON_ONCE(power_well->data != PIPE_A); |
9c065a7d DV |
1468 | |
1469 | chv_set_pipe_power_well(dev_priv, power_well, true); | |
afd6275d | 1470 | |
2be7d540 | 1471 | vlv_display_power_well_init(dev_priv); |
9c065a7d DV |
1472 | } |
1473 | ||
1474 | static void chv_pipe_power_well_disable(struct drm_i915_private *dev_priv, | |
1475 | struct i915_power_well *power_well) | |
1476 | { | |
8fcd5cd8 VS |
1477 | WARN_ON_ONCE(power_well->data != PIPE_A); |
1478 | ||
2be7d540 | 1479 | vlv_display_power_well_deinit(dev_priv); |
afd6275d | 1480 | |
9c065a7d DV |
1481 | chv_set_pipe_power_well(dev_priv, power_well, false); |
1482 | } | |
1483 | ||
09731280 ID |
1484 | static void |
1485 | __intel_display_power_get_domain(struct drm_i915_private *dev_priv, | |
1486 | enum intel_display_power_domain domain) | |
1487 | { | |
1488 | struct i915_power_domains *power_domains = &dev_priv->power_domains; | |
1489 | struct i915_power_well *power_well; | |
1490 | int i; | |
1491 | ||
1492 | for_each_power_well(i, power_well, BIT(domain), power_domains) { | |
1493 | if (!power_well->count++) | |
1494 | intel_power_well_enable(dev_priv, power_well); | |
1495 | } | |
1496 | ||
1497 | power_domains->domain_use_count[domain]++; | |
1498 | } | |
1499 | ||
e4e7684f DV |
1500 | /** |
1501 | * intel_display_power_get - grab a power domain reference | |
1502 | * @dev_priv: i915 device instance | |
1503 | * @domain: power domain to reference | |
1504 | * | |
1505 | * This function grabs a power domain reference for @domain and ensures that the | |
1506 | * power domain and all its parents are powered up. Therefore users should only | |
1507 | * grab a reference to the innermost power domain they need. | |
1508 | * | |
1509 | * Any power domain reference obtained by this function must have a symmetric | |
1510 | * call to intel_display_power_put() to release the reference again. | |
1511 | */ | |
9c065a7d DV |
1512 | void intel_display_power_get(struct drm_i915_private *dev_priv, |
1513 | enum intel_display_power_domain domain) | |
1514 | { | |
09731280 | 1515 | struct i915_power_domains *power_domains = &dev_priv->power_domains; |
9c065a7d DV |
1516 | |
1517 | intel_runtime_pm_get(dev_priv); | |
1518 | ||
09731280 ID |
1519 | mutex_lock(&power_domains->lock); |
1520 | ||
1521 | __intel_display_power_get_domain(dev_priv, domain); | |
1522 | ||
1523 | mutex_unlock(&power_domains->lock); | |
1524 | } | |
1525 | ||
1526 | /** | |
1527 | * intel_display_power_get_if_enabled - grab a reference for an enabled display power domain | |
1528 | * @dev_priv: i915 device instance | |
1529 | * @domain: power domain to reference | |
1530 | * | |
1531 | * This function grabs a power domain reference for @domain and ensures that the | |
1532 | * power domain and all its parents are powered up. Therefore users should only | |
1533 | * grab a reference to the innermost power domain they need. | |
1534 | * | |
1535 | * Any power domain reference obtained by this function must have a symmetric | |
1536 | * call to intel_display_power_put() to release the reference again. | |
1537 | */ | |
1538 | bool intel_display_power_get_if_enabled(struct drm_i915_private *dev_priv, | |
1539 | enum intel_display_power_domain domain) | |
1540 | { | |
1541 | struct i915_power_domains *power_domains = &dev_priv->power_domains; | |
1542 | bool is_enabled; | |
1543 | ||
1544 | if (!intel_runtime_pm_get_if_in_use(dev_priv)) | |
1545 | return false; | |
9c065a7d DV |
1546 | |
1547 | mutex_lock(&power_domains->lock); | |
1548 | ||
09731280 ID |
1549 | if (__intel_display_power_is_enabled(dev_priv, domain)) { |
1550 | __intel_display_power_get_domain(dev_priv, domain); | |
1551 | is_enabled = true; | |
1552 | } else { | |
1553 | is_enabled = false; | |
9c065a7d DV |
1554 | } |
1555 | ||
9c065a7d | 1556 | mutex_unlock(&power_domains->lock); |
09731280 ID |
1557 | |
1558 | if (!is_enabled) | |
1559 | intel_runtime_pm_put(dev_priv); | |
1560 | ||
1561 | return is_enabled; | |
9c065a7d DV |
1562 | } |
1563 | ||
e4e7684f DV |
1564 | /** |
1565 | * intel_display_power_put - release a power domain reference | |
1566 | * @dev_priv: i915 device instance | |
1567 | * @domain: power domain to reference | |
1568 | * | |
1569 | * This function drops the power domain reference obtained by | |
1570 | * intel_display_power_get() and might power down the corresponding hardware | |
1571 | * block right away if this is the last reference. | |
1572 | */ | |
9c065a7d DV |
1573 | void intel_display_power_put(struct drm_i915_private *dev_priv, |
1574 | enum intel_display_power_domain domain) | |
1575 | { | |
1576 | struct i915_power_domains *power_domains; | |
1577 | struct i915_power_well *power_well; | |
1578 | int i; | |
1579 | ||
1580 | power_domains = &dev_priv->power_domains; | |
1581 | ||
1582 | mutex_lock(&power_domains->lock); | |
1583 | ||
11c86db8 DS |
1584 | WARN(!power_domains->domain_use_count[domain], |
1585 | "Use count on domain %s is already zero\n", | |
1586 | intel_display_power_domain_str(domain)); | |
9c065a7d DV |
1587 | power_domains->domain_use_count[domain]--; |
1588 | ||
1589 | for_each_power_well_rev(i, power_well, BIT(domain), power_domains) { | |
11c86db8 DS |
1590 | WARN(!power_well->count, |
1591 | "Use count on power well %s is already zero", | |
1592 | power_well->name); | |
9c065a7d | 1593 | |
d314cd43 | 1594 | if (!--power_well->count) |
dcddab3a | 1595 | intel_power_well_disable(dev_priv, power_well); |
9c065a7d DV |
1596 | } |
1597 | ||
1598 | mutex_unlock(&power_domains->lock); | |
1599 | ||
1600 | intel_runtime_pm_put(dev_priv); | |
1601 | } | |
1602 | ||
9c065a7d DV |
1603 | #define HSW_ALWAYS_ON_POWER_DOMAINS ( \ |
1604 | BIT(POWER_DOMAIN_PIPE_A) | \ | |
1605 | BIT(POWER_DOMAIN_TRANSCODER_EDP) | \ | |
6331a704 PJ |
1606 | BIT(POWER_DOMAIN_PORT_DDI_A_LANES) | \ |
1607 | BIT(POWER_DOMAIN_PORT_DDI_B_LANES) | \ | |
1608 | BIT(POWER_DOMAIN_PORT_DDI_C_LANES) | \ | |
1609 | BIT(POWER_DOMAIN_PORT_DDI_D_LANES) | \ | |
9c065a7d DV |
1610 | BIT(POWER_DOMAIN_PORT_CRT) | \ |
1611 | BIT(POWER_DOMAIN_PLLS) | \ | |
1407121a S |
1612 | BIT(POWER_DOMAIN_AUX_A) | \ |
1613 | BIT(POWER_DOMAIN_AUX_B) | \ | |
1614 | BIT(POWER_DOMAIN_AUX_C) | \ | |
1615 | BIT(POWER_DOMAIN_AUX_D) | \ | |
f0ab43e6 | 1616 | BIT(POWER_DOMAIN_GMBUS) | \ |
9c065a7d DV |
1617 | BIT(POWER_DOMAIN_INIT)) |
1618 | #define HSW_DISPLAY_POWER_DOMAINS ( \ | |
1619 | (POWER_DOMAIN_MASK & ~HSW_ALWAYS_ON_POWER_DOMAINS) | \ | |
1620 | BIT(POWER_DOMAIN_INIT)) | |
1621 | ||
1622 | #define BDW_ALWAYS_ON_POWER_DOMAINS ( \ | |
1623 | HSW_ALWAYS_ON_POWER_DOMAINS | \ | |
1624 | BIT(POWER_DOMAIN_PIPE_A_PANEL_FITTER)) | |
1625 | #define BDW_DISPLAY_POWER_DOMAINS ( \ | |
1626 | (POWER_DOMAIN_MASK & ~BDW_ALWAYS_ON_POWER_DOMAINS) | \ | |
1627 | BIT(POWER_DOMAIN_INIT)) | |
1628 | ||
1629 | #define VLV_ALWAYS_ON_POWER_DOMAINS BIT(POWER_DOMAIN_INIT) | |
1630 | #define VLV_DISPLAY_POWER_DOMAINS POWER_DOMAIN_MASK | |
1631 | ||
1632 | #define VLV_DPIO_CMN_BC_POWER_DOMAINS ( \ | |
6331a704 PJ |
1633 | BIT(POWER_DOMAIN_PORT_DDI_B_LANES) | \ |
1634 | BIT(POWER_DOMAIN_PORT_DDI_C_LANES) | \ | |
9c065a7d | 1635 | BIT(POWER_DOMAIN_PORT_CRT) | \ |
1407121a S |
1636 | BIT(POWER_DOMAIN_AUX_B) | \ |
1637 | BIT(POWER_DOMAIN_AUX_C) | \ | |
9c065a7d DV |
1638 | BIT(POWER_DOMAIN_INIT)) |
1639 | ||
1640 | #define VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS ( \ | |
6331a704 | 1641 | BIT(POWER_DOMAIN_PORT_DDI_B_LANES) | \ |
1407121a | 1642 | BIT(POWER_DOMAIN_AUX_B) | \ |
9c065a7d DV |
1643 | BIT(POWER_DOMAIN_INIT)) |
1644 | ||
1645 | #define VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS ( \ | |
6331a704 | 1646 | BIT(POWER_DOMAIN_PORT_DDI_B_LANES) | \ |
1407121a | 1647 | BIT(POWER_DOMAIN_AUX_B) | \ |
9c065a7d DV |
1648 | BIT(POWER_DOMAIN_INIT)) |
1649 | ||
1650 | #define VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS ( \ | |
6331a704 | 1651 | BIT(POWER_DOMAIN_PORT_DDI_C_LANES) | \ |
1407121a | 1652 | BIT(POWER_DOMAIN_AUX_C) | \ |
9c065a7d DV |
1653 | BIT(POWER_DOMAIN_INIT)) |
1654 | ||
1655 | #define VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS ( \ | |
6331a704 | 1656 | BIT(POWER_DOMAIN_PORT_DDI_C_LANES) | \ |
1407121a | 1657 | BIT(POWER_DOMAIN_AUX_C) | \ |
9c065a7d DV |
1658 | BIT(POWER_DOMAIN_INIT)) |
1659 | ||
9c065a7d | 1660 | #define CHV_DPIO_CMN_BC_POWER_DOMAINS ( \ |
6331a704 PJ |
1661 | BIT(POWER_DOMAIN_PORT_DDI_B_LANES) | \ |
1662 | BIT(POWER_DOMAIN_PORT_DDI_C_LANES) | \ | |
1407121a S |
1663 | BIT(POWER_DOMAIN_AUX_B) | \ |
1664 | BIT(POWER_DOMAIN_AUX_C) | \ | |
9c065a7d DV |
1665 | BIT(POWER_DOMAIN_INIT)) |
1666 | ||
1667 | #define CHV_DPIO_CMN_D_POWER_DOMAINS ( \ | |
6331a704 | 1668 | BIT(POWER_DOMAIN_PORT_DDI_D_LANES) | \ |
1407121a | 1669 | BIT(POWER_DOMAIN_AUX_D) | \ |
9c065a7d DV |
1670 | BIT(POWER_DOMAIN_INIT)) |
1671 | ||
9c065a7d DV |
1672 | static const struct i915_power_well_ops i9xx_always_on_power_well_ops = { |
1673 | .sync_hw = i9xx_always_on_power_well_noop, | |
1674 | .enable = i9xx_always_on_power_well_noop, | |
1675 | .disable = i9xx_always_on_power_well_noop, | |
1676 | .is_enabled = i9xx_always_on_power_well_enabled, | |
1677 | }; | |
1678 | ||
1679 | static const struct i915_power_well_ops chv_pipe_power_well_ops = { | |
1680 | .sync_hw = chv_pipe_power_well_sync_hw, | |
1681 | .enable = chv_pipe_power_well_enable, | |
1682 | .disable = chv_pipe_power_well_disable, | |
1683 | .is_enabled = chv_pipe_power_well_enabled, | |
1684 | }; | |
1685 | ||
1686 | static const struct i915_power_well_ops chv_dpio_cmn_power_well_ops = { | |
1687 | .sync_hw = vlv_power_well_sync_hw, | |
1688 | .enable = chv_dpio_cmn_power_well_enable, | |
1689 | .disable = chv_dpio_cmn_power_well_disable, | |
1690 | .is_enabled = vlv_power_well_enabled, | |
1691 | }; | |
1692 | ||
1693 | static struct i915_power_well i9xx_always_on_power_well[] = { | |
1694 | { | |
1695 | .name = "always-on", | |
1696 | .always_on = 1, | |
1697 | .domains = POWER_DOMAIN_MASK, | |
1698 | .ops = &i9xx_always_on_power_well_ops, | |
1699 | }, | |
1700 | }; | |
1701 | ||
1702 | static const struct i915_power_well_ops hsw_power_well_ops = { | |
1703 | .sync_hw = hsw_power_well_sync_hw, | |
1704 | .enable = hsw_power_well_enable, | |
1705 | .disable = hsw_power_well_disable, | |
1706 | .is_enabled = hsw_power_well_enabled, | |
1707 | }; | |
1708 | ||
94dd5138 S |
1709 | static const struct i915_power_well_ops skl_power_well_ops = { |
1710 | .sync_hw = skl_power_well_sync_hw, | |
1711 | .enable = skl_power_well_enable, | |
1712 | .disable = skl_power_well_disable, | |
1713 | .is_enabled = skl_power_well_enabled, | |
1714 | }; | |
1715 | ||
9f836f90 PJ |
1716 | static const struct i915_power_well_ops gen9_dc_off_power_well_ops = { |
1717 | .sync_hw = gen9_dc_off_power_well_sync_hw, | |
1718 | .enable = gen9_dc_off_power_well_enable, | |
1719 | .disable = gen9_dc_off_power_well_disable, | |
1720 | .is_enabled = gen9_dc_off_power_well_enabled, | |
1721 | }; | |
1722 | ||
9c065a7d DV |
1723 | static struct i915_power_well hsw_power_wells[] = { |
1724 | { | |
1725 | .name = "always-on", | |
1726 | .always_on = 1, | |
1727 | .domains = HSW_ALWAYS_ON_POWER_DOMAINS, | |
1728 | .ops = &i9xx_always_on_power_well_ops, | |
1729 | }, | |
1730 | { | |
1731 | .name = "display", | |
1732 | .domains = HSW_DISPLAY_POWER_DOMAINS, | |
1733 | .ops = &hsw_power_well_ops, | |
1734 | }, | |
1735 | }; | |
1736 | ||
1737 | static struct i915_power_well bdw_power_wells[] = { | |
1738 | { | |
1739 | .name = "always-on", | |
1740 | .always_on = 1, | |
1741 | .domains = BDW_ALWAYS_ON_POWER_DOMAINS, | |
1742 | .ops = &i9xx_always_on_power_well_ops, | |
1743 | }, | |
1744 | { | |
1745 | .name = "display", | |
1746 | .domains = BDW_DISPLAY_POWER_DOMAINS, | |
1747 | .ops = &hsw_power_well_ops, | |
1748 | }, | |
1749 | }; | |
1750 | ||
1751 | static const struct i915_power_well_ops vlv_display_power_well_ops = { | |
1752 | .sync_hw = vlv_power_well_sync_hw, | |
1753 | .enable = vlv_display_power_well_enable, | |
1754 | .disable = vlv_display_power_well_disable, | |
1755 | .is_enabled = vlv_power_well_enabled, | |
1756 | }; | |
1757 | ||
1758 | static const struct i915_power_well_ops vlv_dpio_cmn_power_well_ops = { | |
1759 | .sync_hw = vlv_power_well_sync_hw, | |
1760 | .enable = vlv_dpio_cmn_power_well_enable, | |
1761 | .disable = vlv_dpio_cmn_power_well_disable, | |
1762 | .is_enabled = vlv_power_well_enabled, | |
1763 | }; | |
1764 | ||
1765 | static const struct i915_power_well_ops vlv_dpio_power_well_ops = { | |
1766 | .sync_hw = vlv_power_well_sync_hw, | |
1767 | .enable = vlv_power_well_enable, | |
1768 | .disable = vlv_power_well_disable, | |
1769 | .is_enabled = vlv_power_well_enabled, | |
1770 | }; | |
1771 | ||
1772 | static struct i915_power_well vlv_power_wells[] = { | |
1773 | { | |
1774 | .name = "always-on", | |
1775 | .always_on = 1, | |
1776 | .domains = VLV_ALWAYS_ON_POWER_DOMAINS, | |
1777 | .ops = &i9xx_always_on_power_well_ops, | |
56fcfd63 | 1778 | .data = PUNIT_POWER_WELL_ALWAYS_ON, |
9c065a7d DV |
1779 | }, |
1780 | { | |
1781 | .name = "display", | |
1782 | .domains = VLV_DISPLAY_POWER_DOMAINS, | |
1783 | .data = PUNIT_POWER_WELL_DISP2D, | |
1784 | .ops = &vlv_display_power_well_ops, | |
1785 | }, | |
1786 | { | |
1787 | .name = "dpio-tx-b-01", | |
1788 | .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS | | |
1789 | VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS | | |
1790 | VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS | | |
1791 | VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS, | |
1792 | .ops = &vlv_dpio_power_well_ops, | |
1793 | .data = PUNIT_POWER_WELL_DPIO_TX_B_LANES_01, | |
1794 | }, | |
1795 | { | |
1796 | .name = "dpio-tx-b-23", | |
1797 | .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS | | |
1798 | VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS | | |
1799 | VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS | | |
1800 | VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS, | |
1801 | .ops = &vlv_dpio_power_well_ops, | |
1802 | .data = PUNIT_POWER_WELL_DPIO_TX_B_LANES_23, | |
1803 | }, | |
1804 | { | |
1805 | .name = "dpio-tx-c-01", | |
1806 | .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS | | |
1807 | VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS | | |
1808 | VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS | | |
1809 | VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS, | |
1810 | .ops = &vlv_dpio_power_well_ops, | |
1811 | .data = PUNIT_POWER_WELL_DPIO_TX_C_LANES_01, | |
1812 | }, | |
1813 | { | |
1814 | .name = "dpio-tx-c-23", | |
1815 | .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS | | |
1816 | VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS | | |
1817 | VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS | | |
1818 | VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS, | |
1819 | .ops = &vlv_dpio_power_well_ops, | |
1820 | .data = PUNIT_POWER_WELL_DPIO_TX_C_LANES_23, | |
1821 | }, | |
1822 | { | |
1823 | .name = "dpio-common", | |
1824 | .domains = VLV_DPIO_CMN_BC_POWER_DOMAINS, | |
1825 | .data = PUNIT_POWER_WELL_DPIO_CMN_BC, | |
1826 | .ops = &vlv_dpio_cmn_power_well_ops, | |
1827 | }, | |
1828 | }; | |
1829 | ||
1830 | static struct i915_power_well chv_power_wells[] = { | |
1831 | { | |
1832 | .name = "always-on", | |
1833 | .always_on = 1, | |
1834 | .domains = VLV_ALWAYS_ON_POWER_DOMAINS, | |
1835 | .ops = &i9xx_always_on_power_well_ops, | |
1836 | }, | |
9c065a7d DV |
1837 | { |
1838 | .name = "display", | |
baa4e575 | 1839 | /* |
fde61e4b VS |
1840 | * Pipe A power well is the new disp2d well. Pipe B and C |
1841 | * power wells don't actually exist. Pipe A power well is | |
1842 | * required for any pipe to work. | |
baa4e575 | 1843 | */ |
fde61e4b | 1844 | .domains = VLV_DISPLAY_POWER_DOMAINS, |
9c065a7d DV |
1845 | .data = PIPE_A, |
1846 | .ops = &chv_pipe_power_well_ops, | |
1847 | }, | |
9c065a7d DV |
1848 | { |
1849 | .name = "dpio-common-bc", | |
71849b67 | 1850 | .domains = CHV_DPIO_CMN_BC_POWER_DOMAINS, |
9c065a7d DV |
1851 | .data = PUNIT_POWER_WELL_DPIO_CMN_BC, |
1852 | .ops = &chv_dpio_cmn_power_well_ops, | |
1853 | }, | |
1854 | { | |
1855 | .name = "dpio-common-d", | |
71849b67 | 1856 | .domains = CHV_DPIO_CMN_D_POWER_DOMAINS, |
9c065a7d DV |
1857 | .data = PUNIT_POWER_WELL_DPIO_CMN_D, |
1858 | .ops = &chv_dpio_cmn_power_well_ops, | |
1859 | }, | |
9c065a7d DV |
1860 | }; |
1861 | ||
5aefb239 SS |
1862 | bool intel_display_power_well_is_enabled(struct drm_i915_private *dev_priv, |
1863 | int power_well_id) | |
1864 | { | |
1865 | struct i915_power_well *power_well; | |
1866 | bool ret; | |
1867 | ||
1868 | power_well = lookup_power_well(dev_priv, power_well_id); | |
1869 | ret = power_well->ops->is_enabled(dev_priv, power_well); | |
1870 | ||
1871 | return ret; | |
1872 | } | |
1873 | ||
94dd5138 S |
1874 | static struct i915_power_well skl_power_wells[] = { |
1875 | { | |
1876 | .name = "always-on", | |
1877 | .always_on = 1, | |
1878 | .domains = SKL_DISPLAY_ALWAYS_ON_POWER_DOMAINS, | |
1879 | .ops = &i9xx_always_on_power_well_ops, | |
56fcfd63 | 1880 | .data = SKL_DISP_PW_ALWAYS_ON, |
94dd5138 S |
1881 | }, |
1882 | { | |
1883 | .name = "power well 1", | |
4a76f295 ID |
1884 | /* Handled by the DMC firmware */ |
1885 | .domains = 0, | |
94dd5138 S |
1886 | .ops = &skl_power_well_ops, |
1887 | .data = SKL_DISP_PW_1, | |
1888 | }, | |
1889 | { | |
1890 | .name = "MISC IO power well", | |
4a76f295 ID |
1891 | /* Handled by the DMC firmware */ |
1892 | .domains = 0, | |
94dd5138 S |
1893 | .ops = &skl_power_well_ops, |
1894 | .data = SKL_DISP_PW_MISC_IO, | |
1895 | }, | |
9f836f90 PJ |
1896 | { |
1897 | .name = "DC off", | |
1898 | .domains = SKL_DISPLAY_DC_OFF_POWER_DOMAINS, | |
1899 | .ops = &gen9_dc_off_power_well_ops, | |
1900 | .data = SKL_DISP_PW_DC_OFF, | |
1901 | }, | |
94dd5138 S |
1902 | { |
1903 | .name = "power well 2", | |
1904 | .domains = SKL_DISPLAY_POWERWELL_2_POWER_DOMAINS, | |
1905 | .ops = &skl_power_well_ops, | |
1906 | .data = SKL_DISP_PW_2, | |
1907 | }, | |
1908 | { | |
1909 | .name = "DDI A/E power well", | |
1910 | .domains = SKL_DISPLAY_DDI_A_E_POWER_DOMAINS, | |
1911 | .ops = &skl_power_well_ops, | |
1912 | .data = SKL_DISP_PW_DDI_A_E, | |
1913 | }, | |
1914 | { | |
1915 | .name = "DDI B power well", | |
1916 | .domains = SKL_DISPLAY_DDI_B_POWER_DOMAINS, | |
1917 | .ops = &skl_power_well_ops, | |
1918 | .data = SKL_DISP_PW_DDI_B, | |
1919 | }, | |
1920 | { | |
1921 | .name = "DDI C power well", | |
1922 | .domains = SKL_DISPLAY_DDI_C_POWER_DOMAINS, | |
1923 | .ops = &skl_power_well_ops, | |
1924 | .data = SKL_DISP_PW_DDI_C, | |
1925 | }, | |
1926 | { | |
1927 | .name = "DDI D power well", | |
1928 | .domains = SKL_DISPLAY_DDI_D_POWER_DOMAINS, | |
1929 | .ops = &skl_power_well_ops, | |
1930 | .data = SKL_DISP_PW_DDI_D, | |
1931 | }, | |
1932 | }; | |
1933 | ||
2f693e28 DL |
1934 | void skl_pw1_misc_io_init(struct drm_i915_private *dev_priv) |
1935 | { | |
1936 | struct i915_power_well *well; | |
1937 | ||
16fbc291 | 1938 | if (!(IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv))) |
2f693e28 DL |
1939 | return; |
1940 | ||
1941 | well = lookup_power_well(dev_priv, SKL_DISP_PW_1); | |
1942 | intel_power_well_enable(dev_priv, well); | |
1943 | ||
1944 | well = lookup_power_well(dev_priv, SKL_DISP_PW_MISC_IO); | |
1945 | intel_power_well_enable(dev_priv, well); | |
1946 | } | |
1947 | ||
1948 | void skl_pw1_misc_io_fini(struct drm_i915_private *dev_priv) | |
1949 | { | |
1950 | struct i915_power_well *well; | |
1951 | ||
16fbc291 | 1952 | if (!(IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv))) |
2f693e28 DL |
1953 | return; |
1954 | ||
1955 | well = lookup_power_well(dev_priv, SKL_DISP_PW_1); | |
1956 | intel_power_well_disable(dev_priv, well); | |
1957 | ||
1958 | well = lookup_power_well(dev_priv, SKL_DISP_PW_MISC_IO); | |
1959 | intel_power_well_disable(dev_priv, well); | |
1960 | } | |
1961 | ||
0b4a2a36 S |
1962 | static struct i915_power_well bxt_power_wells[] = { |
1963 | { | |
1964 | .name = "always-on", | |
1965 | .always_on = 1, | |
1966 | .domains = BXT_DISPLAY_ALWAYS_ON_POWER_DOMAINS, | |
1967 | .ops = &i9xx_always_on_power_well_ops, | |
1968 | }, | |
1969 | { | |
1970 | .name = "power well 1", | |
1971 | .domains = BXT_DISPLAY_POWERWELL_1_POWER_DOMAINS, | |
1972 | .ops = &skl_power_well_ops, | |
1973 | .data = SKL_DISP_PW_1, | |
1974 | }, | |
9f836f90 PJ |
1975 | { |
1976 | .name = "DC off", | |
1977 | .domains = BXT_DISPLAY_DC_OFF_POWER_DOMAINS, | |
1978 | .ops = &gen9_dc_off_power_well_ops, | |
1979 | .data = SKL_DISP_PW_DC_OFF, | |
1980 | }, | |
0b4a2a36 S |
1981 | { |
1982 | .name = "power well 2", | |
1983 | .domains = BXT_DISPLAY_POWERWELL_2_POWER_DOMAINS, | |
1984 | .ops = &skl_power_well_ops, | |
1985 | .data = SKL_DISP_PW_2, | |
9f836f90 | 1986 | }, |
0b4a2a36 S |
1987 | }; |
1988 | ||
1b0e3a04 ID |
1989 | static int |
1990 | sanitize_disable_power_well_option(const struct drm_i915_private *dev_priv, | |
1991 | int disable_power_well) | |
1992 | { | |
1993 | if (disable_power_well >= 0) | |
1994 | return !!disable_power_well; | |
1995 | ||
18024199 MR |
1996 | if (IS_BROXTON(dev_priv)) { |
1997 | DRM_DEBUG_KMS("Disabling display power well support\n"); | |
1998 | return 0; | |
1999 | } | |
2000 | ||
1b0e3a04 ID |
2001 | return 1; |
2002 | } | |
2003 | ||
9c065a7d DV |
2004 | #define set_power_wells(power_domains, __power_wells) ({ \ |
2005 | (power_domains)->power_wells = (__power_wells); \ | |
2006 | (power_domains)->power_well_count = ARRAY_SIZE(__power_wells); \ | |
2007 | }) | |
2008 | ||
e4e7684f DV |
2009 | /** |
2010 | * intel_power_domains_init - initializes the power domain structures | |
2011 | * @dev_priv: i915 device instance | |
2012 | * | |
2013 | * Initializes the power domain structures for @dev_priv depending upon the | |
2014 | * supported platform. | |
2015 | */ | |
9c065a7d DV |
2016 | int intel_power_domains_init(struct drm_i915_private *dev_priv) |
2017 | { | |
2018 | struct i915_power_domains *power_domains = &dev_priv->power_domains; | |
2019 | ||
1b0e3a04 ID |
2020 | i915.disable_power_well = sanitize_disable_power_well_option(dev_priv, |
2021 | i915.disable_power_well); | |
2022 | ||
f0ab43e6 VS |
2023 | BUILD_BUG_ON(POWER_DOMAIN_NUM > 31); |
2024 | ||
9c065a7d DV |
2025 | mutex_init(&power_domains->lock); |
2026 | ||
2027 | /* | |
2028 | * The enabling order will be from lower to higher indexed wells, | |
2029 | * the disabling order is reversed. | |
2030 | */ | |
2031 | if (IS_HASWELL(dev_priv->dev)) { | |
2032 | set_power_wells(power_domains, hsw_power_wells); | |
9c065a7d DV |
2033 | } else if (IS_BROADWELL(dev_priv->dev)) { |
2034 | set_power_wells(power_domains, bdw_power_wells); | |
ef11bdb3 | 2035 | } else if (IS_SKYLAKE(dev_priv->dev) || IS_KABYLAKE(dev_priv->dev)) { |
94dd5138 | 2036 | set_power_wells(power_domains, skl_power_wells); |
0b4a2a36 S |
2037 | } else if (IS_BROXTON(dev_priv->dev)) { |
2038 | set_power_wells(power_domains, bxt_power_wells); | |
9c065a7d DV |
2039 | } else if (IS_CHERRYVIEW(dev_priv->dev)) { |
2040 | set_power_wells(power_domains, chv_power_wells); | |
2041 | } else if (IS_VALLEYVIEW(dev_priv->dev)) { | |
2042 | set_power_wells(power_domains, vlv_power_wells); | |
2043 | } else { | |
2044 | set_power_wells(power_domains, i9xx_always_on_power_well); | |
2045 | } | |
2046 | ||
2047 | return 0; | |
2048 | } | |
2049 | ||
e4e7684f DV |
2050 | /** |
2051 | * intel_power_domains_fini - finalizes the power domain structures | |
2052 | * @dev_priv: i915 device instance | |
2053 | * | |
2054 | * Finalizes the power domain structures for @dev_priv depending upon the | |
2055 | * supported platform. This function also disables runtime pm and ensures that | |
2056 | * the device stays powered up so that the driver can be reloaded. | |
2057 | */ | |
f458ebbc | 2058 | void intel_power_domains_fini(struct drm_i915_private *dev_priv) |
9c065a7d | 2059 | { |
25b181b4 ID |
2060 | struct device *device = &dev_priv->dev->pdev->dev; |
2061 | ||
aabee1bb ID |
2062 | /* |
2063 | * The i915.ko module is still not prepared to be loaded when | |
f458ebbc | 2064 | * the power well is not enabled, so just enable it in case |
aabee1bb ID |
2065 | * we're going to unload/reload. |
2066 | * The following also reacquires the RPM reference the core passed | |
2067 | * to the driver during loading, which is dropped in | |
2068 | * intel_runtime_pm_enable(). We have to hand back the control of the | |
2069 | * device to the core with this reference held. | |
2070 | */ | |
f458ebbc | 2071 | intel_display_set_init_power(dev_priv, true); |
d314cd43 ID |
2072 | |
2073 | /* Remove the refcount we took to keep power well support disabled. */ | |
2074 | if (!i915.disable_power_well) | |
2075 | intel_display_power_put(dev_priv, POWER_DOMAIN_INIT); | |
25b181b4 ID |
2076 | |
2077 | /* | |
2078 | * Remove the refcount we took in intel_runtime_pm_enable() in case | |
2079 | * the platform doesn't support runtime PM. | |
2080 | */ | |
2081 | if (!HAS_RUNTIME_PM(dev_priv)) | |
2082 | pm_runtime_put(device); | |
9c065a7d DV |
2083 | } |
2084 | ||
30eade12 | 2085 | static void intel_power_domains_sync_hw(struct drm_i915_private *dev_priv) |
9c065a7d DV |
2086 | { |
2087 | struct i915_power_domains *power_domains = &dev_priv->power_domains; | |
2088 | struct i915_power_well *power_well; | |
2089 | int i; | |
2090 | ||
2091 | mutex_lock(&power_domains->lock); | |
2092 | for_each_power_well(i, power_well, POWER_DOMAIN_MASK, power_domains) { | |
2093 | power_well->ops->sync_hw(dev_priv, power_well); | |
2094 | power_well->hw_enabled = power_well->ops->is_enabled(dev_priv, | |
2095 | power_well); | |
2096 | } | |
2097 | mutex_unlock(&power_domains->lock); | |
2098 | } | |
2099 | ||
73dfc227 ID |
2100 | static void skl_display_core_init(struct drm_i915_private *dev_priv, |
2101 | bool resume) | |
2102 | { | |
2103 | struct i915_power_domains *power_domains = &dev_priv->power_domains; | |
2104 | uint32_t val; | |
2105 | ||
d26fa1d5 ID |
2106 | gen9_set_dc_state(dev_priv, DC_STATE_DISABLE); |
2107 | ||
73dfc227 ID |
2108 | /* enable PCH reset handshake */ |
2109 | val = I915_READ(HSW_NDE_RSTWRN_OPT); | |
2110 | I915_WRITE(HSW_NDE_RSTWRN_OPT, val | RESET_PCH_HANDSHAKE_ENABLE); | |
2111 | ||
2112 | /* enable PG1 and Misc I/O */ | |
2113 | mutex_lock(&power_domains->lock); | |
2114 | skl_pw1_misc_io_init(dev_priv); | |
2115 | mutex_unlock(&power_domains->lock); | |
2116 | ||
2117 | if (!resume) | |
2118 | return; | |
2119 | ||
2120 | skl_init_cdclk(dev_priv); | |
2121 | ||
1e657ad7 MK |
2122 | if (dev_priv->csr.dmc_payload && intel_csr_load_program(dev_priv)) |
2123 | gen9_set_dc_state_debugmask(dev_priv); | |
73dfc227 ID |
2124 | } |
2125 | ||
2126 | static void skl_display_core_uninit(struct drm_i915_private *dev_priv) | |
2127 | { | |
2128 | struct i915_power_domains *power_domains = &dev_priv->power_domains; | |
2129 | ||
d26fa1d5 ID |
2130 | gen9_set_dc_state(dev_priv, DC_STATE_DISABLE); |
2131 | ||
73dfc227 ID |
2132 | skl_uninit_cdclk(dev_priv); |
2133 | ||
2134 | /* The spec doesn't call for removing the reset handshake flag */ | |
2135 | /* disable PG1 and Misc I/O */ | |
2136 | mutex_lock(&power_domains->lock); | |
2137 | skl_pw1_misc_io_fini(dev_priv); | |
2138 | mutex_unlock(&power_domains->lock); | |
2139 | } | |
2140 | ||
70722468 VS |
2141 | static void chv_phy_control_init(struct drm_i915_private *dev_priv) |
2142 | { | |
2143 | struct i915_power_well *cmn_bc = | |
2144 | lookup_power_well(dev_priv, PUNIT_POWER_WELL_DPIO_CMN_BC); | |
2145 | struct i915_power_well *cmn_d = | |
2146 | lookup_power_well(dev_priv, PUNIT_POWER_WELL_DPIO_CMN_D); | |
2147 | ||
2148 | /* | |
2149 | * DISPLAY_PHY_CONTROL can get corrupted if read. As a | |
2150 | * workaround never ever read DISPLAY_PHY_CONTROL, and | |
2151 | * instead maintain a shadow copy ourselves. Use the actual | |
e0fce78f VS |
2152 | * power well state and lane status to reconstruct the |
2153 | * expected initial value. | |
70722468 VS |
2154 | */ |
2155 | dev_priv->chv_phy_control = | |
bc284542 VS |
2156 | PHY_LDO_SEQ_DELAY(PHY_LDO_DELAY_600NS, DPIO_PHY0) | |
2157 | PHY_LDO_SEQ_DELAY(PHY_LDO_DELAY_600NS, DPIO_PHY1) | | |
e0fce78f VS |
2158 | PHY_CH_POWER_MODE(PHY_CH_DEEP_PSR, DPIO_PHY0, DPIO_CH0) | |
2159 | PHY_CH_POWER_MODE(PHY_CH_DEEP_PSR, DPIO_PHY0, DPIO_CH1) | | |
2160 | PHY_CH_POWER_MODE(PHY_CH_DEEP_PSR, DPIO_PHY1, DPIO_CH0); | |
2161 | ||
2162 | /* | |
2163 | * If all lanes are disabled we leave the override disabled | |
2164 | * with all power down bits cleared to match the state we | |
2165 | * would use after disabling the port. Otherwise enable the | |
2166 | * override and set the lane powerdown bits accding to the | |
2167 | * current lane status. | |
2168 | */ | |
2169 | if (cmn_bc->ops->is_enabled(dev_priv, cmn_bc)) { | |
2170 | uint32_t status = I915_READ(DPLL(PIPE_A)); | |
2171 | unsigned int mask; | |
2172 | ||
2173 | mask = status & DPLL_PORTB_READY_MASK; | |
2174 | if (mask == 0xf) | |
2175 | mask = 0x0; | |
2176 | else | |
2177 | dev_priv->chv_phy_control |= | |
2178 | PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH0); | |
2179 | ||
2180 | dev_priv->chv_phy_control |= | |
2181 | PHY_CH_POWER_DOWN_OVRD(mask, DPIO_PHY0, DPIO_CH0); | |
2182 | ||
2183 | mask = (status & DPLL_PORTC_READY_MASK) >> 4; | |
2184 | if (mask == 0xf) | |
2185 | mask = 0x0; | |
2186 | else | |
2187 | dev_priv->chv_phy_control |= | |
2188 | PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH1); | |
2189 | ||
2190 | dev_priv->chv_phy_control |= | |
2191 | PHY_CH_POWER_DOWN_OVRD(mask, DPIO_PHY0, DPIO_CH1); | |
2192 | ||
70722468 | 2193 | dev_priv->chv_phy_control |= PHY_COM_LANE_RESET_DEASSERT(DPIO_PHY0); |
3be60de9 VS |
2194 | |
2195 | dev_priv->chv_phy_assert[DPIO_PHY0] = false; | |
2196 | } else { | |
2197 | dev_priv->chv_phy_assert[DPIO_PHY0] = true; | |
e0fce78f VS |
2198 | } |
2199 | ||
2200 | if (cmn_d->ops->is_enabled(dev_priv, cmn_d)) { | |
2201 | uint32_t status = I915_READ(DPIO_PHY_STATUS); | |
2202 | unsigned int mask; | |
2203 | ||
2204 | mask = status & DPLL_PORTD_READY_MASK; | |
2205 | ||
2206 | if (mask == 0xf) | |
2207 | mask = 0x0; | |
2208 | else | |
2209 | dev_priv->chv_phy_control |= | |
2210 | PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY1, DPIO_CH0); | |
2211 | ||
2212 | dev_priv->chv_phy_control |= | |
2213 | PHY_CH_POWER_DOWN_OVRD(mask, DPIO_PHY1, DPIO_CH0); | |
2214 | ||
70722468 | 2215 | dev_priv->chv_phy_control |= PHY_COM_LANE_RESET_DEASSERT(DPIO_PHY1); |
3be60de9 VS |
2216 | |
2217 | dev_priv->chv_phy_assert[DPIO_PHY1] = false; | |
2218 | } else { | |
2219 | dev_priv->chv_phy_assert[DPIO_PHY1] = true; | |
e0fce78f VS |
2220 | } |
2221 | ||
2222 | I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control); | |
2223 | ||
2224 | DRM_DEBUG_KMS("Initial PHY_CONTROL=0x%08x\n", | |
2225 | dev_priv->chv_phy_control); | |
70722468 VS |
2226 | } |
2227 | ||
9c065a7d DV |
2228 | static void vlv_cmnlane_wa(struct drm_i915_private *dev_priv) |
2229 | { | |
2230 | struct i915_power_well *cmn = | |
2231 | lookup_power_well(dev_priv, PUNIT_POWER_WELL_DPIO_CMN_BC); | |
2232 | struct i915_power_well *disp2d = | |
2233 | lookup_power_well(dev_priv, PUNIT_POWER_WELL_DISP2D); | |
2234 | ||
9c065a7d | 2235 | /* If the display might be already active skip this */ |
5d93a6e5 VS |
2236 | if (cmn->ops->is_enabled(dev_priv, cmn) && |
2237 | disp2d->ops->is_enabled(dev_priv, disp2d) && | |
9c065a7d DV |
2238 | I915_READ(DPIO_CTL) & DPIO_CMNRST) |
2239 | return; | |
2240 | ||
2241 | DRM_DEBUG_KMS("toggling display PHY side reset\n"); | |
2242 | ||
2243 | /* cmnlane needs DPLL registers */ | |
2244 | disp2d->ops->enable(dev_priv, disp2d); | |
2245 | ||
2246 | /* | |
2247 | * From VLV2A0_DP_eDP_HDMI_DPIO_driver_vbios_notes_11.docx: | |
2248 | * Need to assert and de-assert PHY SB reset by gating the | |
2249 | * common lane power, then un-gating it. | |
2250 | * Simply ungating isn't enough to reset the PHY enough to get | |
2251 | * ports and lanes running. | |
2252 | */ | |
2253 | cmn->ops->disable(dev_priv, cmn); | |
2254 | } | |
2255 | ||
e4e7684f DV |
2256 | /** |
2257 | * intel_power_domains_init_hw - initialize hardware power domain state | |
2258 | * @dev_priv: i915 device instance | |
2259 | * | |
2260 | * This function initializes the hardware power domain state and enables all | |
2261 | * power domains using intel_display_set_init_power(). | |
2262 | */ | |
73dfc227 | 2263 | void intel_power_domains_init_hw(struct drm_i915_private *dev_priv, bool resume) |
9c065a7d DV |
2264 | { |
2265 | struct drm_device *dev = dev_priv->dev; | |
2266 | struct i915_power_domains *power_domains = &dev_priv->power_domains; | |
2267 | ||
2268 | power_domains->initializing = true; | |
2269 | ||
73dfc227 ID |
2270 | if (IS_SKYLAKE(dev) || IS_KABYLAKE(dev)) { |
2271 | skl_display_core_init(dev_priv, resume); | |
2272 | } else if (IS_CHERRYVIEW(dev)) { | |
770effb1 | 2273 | mutex_lock(&power_domains->lock); |
70722468 | 2274 | chv_phy_control_init(dev_priv); |
770effb1 | 2275 | mutex_unlock(&power_domains->lock); |
70722468 | 2276 | } else if (IS_VALLEYVIEW(dev)) { |
9c065a7d DV |
2277 | mutex_lock(&power_domains->lock); |
2278 | vlv_cmnlane_wa(dev_priv); | |
2279 | mutex_unlock(&power_domains->lock); | |
2280 | } | |
2281 | ||
2282 | /* For now, we need the power well to be always enabled. */ | |
2283 | intel_display_set_init_power(dev_priv, true); | |
d314cd43 ID |
2284 | /* Disable power support if the user asked so. */ |
2285 | if (!i915.disable_power_well) | |
2286 | intel_display_power_get(dev_priv, POWER_DOMAIN_INIT); | |
30eade12 | 2287 | intel_power_domains_sync_hw(dev_priv); |
9c065a7d DV |
2288 | power_domains->initializing = false; |
2289 | } | |
2290 | ||
73dfc227 ID |
2291 | /** |
2292 | * intel_power_domains_suspend - suspend power domain state | |
2293 | * @dev_priv: i915 device instance | |
2294 | * | |
2295 | * This function prepares the hardware power domain state before entering | |
2296 | * system suspend. It must be paired with intel_power_domains_init_hw(). | |
2297 | */ | |
2298 | void intel_power_domains_suspend(struct drm_i915_private *dev_priv) | |
2299 | { | |
2300 | if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) | |
2301 | skl_display_core_uninit(dev_priv); | |
d314cd43 ID |
2302 | |
2303 | /* | |
2304 | * Even if power well support was disabled we still want to disable | |
2305 | * power wells while we are system suspended. | |
2306 | */ | |
2307 | if (!i915.disable_power_well) | |
2308 | intel_display_power_put(dev_priv, POWER_DOMAIN_INIT); | |
73dfc227 ID |
2309 | } |
2310 | ||
e4e7684f DV |
2311 | /** |
2312 | * intel_runtime_pm_get - grab a runtime pm reference | |
2313 | * @dev_priv: i915 device instance | |
2314 | * | |
2315 | * This function grabs a device-level runtime pm reference (mostly used for GEM | |
2316 | * code to ensure the GTT or GT is on) and ensures that it is powered up. | |
2317 | * | |
2318 | * Any runtime pm reference obtained by this function must have a symmetric | |
2319 | * call to intel_runtime_pm_put() to release the reference again. | |
2320 | */ | |
9c065a7d DV |
2321 | void intel_runtime_pm_get(struct drm_i915_private *dev_priv) |
2322 | { | |
2323 | struct drm_device *dev = dev_priv->dev; | |
2324 | struct device *device = &dev->pdev->dev; | |
2325 | ||
9c065a7d | 2326 | pm_runtime_get_sync(device); |
1f814dac ID |
2327 | |
2328 | atomic_inc(&dev_priv->pm.wakeref_count); | |
c9b8846a | 2329 | assert_rpm_wakelock_held(dev_priv); |
9c065a7d DV |
2330 | } |
2331 | ||
09731280 ID |
2332 | /** |
2333 | * intel_runtime_pm_get_if_in_use - grab a runtime pm reference if device in use | |
2334 | * @dev_priv: i915 device instance | |
2335 | * | |
2336 | * This function grabs a device-level runtime pm reference if the device is | |
2337 | * already in use and ensures that it is powered up. | |
2338 | * | |
2339 | * Any runtime pm reference obtained by this function must have a symmetric | |
2340 | * call to intel_runtime_pm_put() to release the reference again. | |
2341 | */ | |
2342 | bool intel_runtime_pm_get_if_in_use(struct drm_i915_private *dev_priv) | |
2343 | { | |
2344 | struct drm_device *dev = dev_priv->dev; | |
2345 | struct device *device = &dev->pdev->dev; | |
2346 | int ret; | |
2347 | ||
2348 | if (!IS_ENABLED(CONFIG_PM)) | |
2349 | return true; | |
2350 | ||
2351 | ret = pm_runtime_get_if_in_use(device); | |
2352 | ||
2353 | /* | |
2354 | * In cases runtime PM is disabled by the RPM core and we get an | |
2355 | * -EINVAL return value we are not supposed to call this function, | |
2356 | * since the power state is undefined. This applies atm to the | |
2357 | * late/early system suspend/resume handlers. | |
2358 | */ | |
2359 | WARN_ON_ONCE(ret < 0); | |
2360 | if (ret <= 0) | |
2361 | return false; | |
2362 | ||
2363 | atomic_inc(&dev_priv->pm.wakeref_count); | |
2364 | assert_rpm_wakelock_held(dev_priv); | |
2365 | ||
2366 | return true; | |
2367 | } | |
2368 | ||
e4e7684f DV |
2369 | /** |
2370 | * intel_runtime_pm_get_noresume - grab a runtime pm reference | |
2371 | * @dev_priv: i915 device instance | |
2372 | * | |
2373 | * This function grabs a device-level runtime pm reference (mostly used for GEM | |
2374 | * code to ensure the GTT or GT is on). | |
2375 | * | |
2376 | * It will _not_ power up the device but instead only check that it's powered | |
2377 | * on. Therefore it is only valid to call this functions from contexts where | |
2378 | * the device is known to be powered up and where trying to power it up would | |
2379 | * result in hilarity and deadlocks. That pretty much means only the system | |
2380 | * suspend/resume code where this is used to grab runtime pm references for | |
2381 | * delayed setup down in work items. | |
2382 | * | |
2383 | * Any runtime pm reference obtained by this function must have a symmetric | |
2384 | * call to intel_runtime_pm_put() to release the reference again. | |
2385 | */ | |
9c065a7d DV |
2386 | void intel_runtime_pm_get_noresume(struct drm_i915_private *dev_priv) |
2387 | { | |
2388 | struct drm_device *dev = dev_priv->dev; | |
2389 | struct device *device = &dev->pdev->dev; | |
2390 | ||
c9b8846a | 2391 | assert_rpm_wakelock_held(dev_priv); |
9c065a7d | 2392 | pm_runtime_get_noresume(device); |
1f814dac ID |
2393 | |
2394 | atomic_inc(&dev_priv->pm.wakeref_count); | |
9c065a7d DV |
2395 | } |
2396 | ||
e4e7684f DV |
2397 | /** |
2398 | * intel_runtime_pm_put - release a runtime pm reference | |
2399 | * @dev_priv: i915 device instance | |
2400 | * | |
2401 | * This function drops the device-level runtime pm reference obtained by | |
2402 | * intel_runtime_pm_get() and might power down the corresponding | |
2403 | * hardware block right away if this is the last reference. | |
2404 | */ | |
9c065a7d DV |
2405 | void intel_runtime_pm_put(struct drm_i915_private *dev_priv) |
2406 | { | |
2407 | struct drm_device *dev = dev_priv->dev; | |
2408 | struct device *device = &dev->pdev->dev; | |
2409 | ||
542db3cd | 2410 | assert_rpm_wakelock_held(dev_priv); |
2b19efeb ID |
2411 | if (atomic_dec_and_test(&dev_priv->pm.wakeref_count)) |
2412 | atomic_inc(&dev_priv->pm.atomic_seq); | |
1f814dac | 2413 | |
9c065a7d DV |
2414 | pm_runtime_mark_last_busy(device); |
2415 | pm_runtime_put_autosuspend(device); | |
2416 | } | |
2417 | ||
e4e7684f DV |
2418 | /** |
2419 | * intel_runtime_pm_enable - enable runtime pm | |
2420 | * @dev_priv: i915 device instance | |
2421 | * | |
2422 | * This function enables runtime pm at the end of the driver load sequence. | |
2423 | * | |
2424 | * Note that this function does currently not enable runtime pm for the | |
2425 | * subordinate display power domains. That is only done on the first modeset | |
2426 | * using intel_display_set_init_power(). | |
2427 | */ | |
f458ebbc | 2428 | void intel_runtime_pm_enable(struct drm_i915_private *dev_priv) |
9c065a7d DV |
2429 | { |
2430 | struct drm_device *dev = dev_priv->dev; | |
2431 | struct device *device = &dev->pdev->dev; | |
2432 | ||
cbc68dc9 ID |
2433 | pm_runtime_set_autosuspend_delay(device, 10000); /* 10s */ |
2434 | pm_runtime_mark_last_busy(device); | |
2435 | ||
25b181b4 ID |
2436 | /* |
2437 | * Take a permanent reference to disable the RPM functionality and drop | |
2438 | * it only when unloading the driver. Use the low level get/put helpers, | |
2439 | * so the driver's own RPM reference tracking asserts also work on | |
2440 | * platforms without RPM support. | |
2441 | */ | |
cbc68dc9 ID |
2442 | if (!HAS_RUNTIME_PM(dev)) { |
2443 | pm_runtime_dont_use_autosuspend(device); | |
25b181b4 | 2444 | pm_runtime_get_sync(device); |
cbc68dc9 ID |
2445 | } else { |
2446 | pm_runtime_use_autosuspend(device); | |
2447 | } | |
9c065a7d | 2448 | |
aabee1bb ID |
2449 | /* |
2450 | * The core calls the driver load handler with an RPM reference held. | |
2451 | * We drop that here and will reacquire it during unloading in | |
2452 | * intel_power_domains_fini(). | |
2453 | */ | |
9c065a7d DV |
2454 | pm_runtime_put_autosuspend(device); |
2455 | } | |
2456 |