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9c065a7d DV |
1 | /* |
2 | * Copyright © 2012-2014 Intel Corporation | |
3 | * | |
4 | * Permission is hereby granted, free of charge, to any person obtaining a | |
5 | * copy of this software and associated documentation files (the "Software"), | |
6 | * to deal in the Software without restriction, including without limitation | |
7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
8 | * and/or sell copies of the Software, and to permit persons to whom the | |
9 | * Software is furnished to do so, subject to the following conditions: | |
10 | * | |
11 | * The above copyright notice and this permission notice (including the next | |
12 | * paragraph) shall be included in all copies or substantial portions of the | |
13 | * Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS | |
21 | * IN THE SOFTWARE. | |
22 | * | |
23 | * Authors: | |
24 | * Eugeni Dodonov <eugeni.dodonov@intel.com> | |
25 | * Daniel Vetter <daniel.vetter@ffwll.ch> | |
26 | * | |
27 | */ | |
28 | ||
29 | #include <linux/pm_runtime.h> | |
30 | #include <linux/vgaarb.h> | |
31 | ||
32 | #include "i915_drv.h" | |
33 | #include "intel_drv.h" | |
9c065a7d | 34 | |
e4e7684f DV |
35 | /** |
36 | * DOC: runtime pm | |
37 | * | |
38 | * The i915 driver supports dynamic enabling and disabling of entire hardware | |
39 | * blocks at runtime. This is especially important on the display side where | |
40 | * software is supposed to control many power gates manually on recent hardware, | |
41 | * since on the GT side a lot of the power management is done by the hardware. | |
42 | * But even there some manual control at the device level is required. | |
43 | * | |
44 | * Since i915 supports a diverse set of platforms with a unified codebase and | |
45 | * hardware engineers just love to shuffle functionality around between power | |
46 | * domains there's a sizeable amount of indirection required. This file provides | |
47 | * generic functions to the driver for grabbing and releasing references for | |
48 | * abstract power domains. It then maps those to the actual power wells | |
49 | * present for a given platform. | |
50 | */ | |
51 | ||
f75a1985 SS |
52 | #define GEN9_ENABLE_DC5(dev) 0 |
53 | #define SKL_ENABLE_DC6(dev) IS_SKYLAKE(dev) | |
dc174300 | 54 | |
9c065a7d DV |
55 | #define for_each_power_well(i, power_well, domain_mask, power_domains) \ |
56 | for (i = 0; \ | |
57 | i < (power_domains)->power_well_count && \ | |
58 | ((power_well) = &(power_domains)->power_wells[i]); \ | |
59 | i++) \ | |
60 | if ((power_well)->domains & (domain_mask)) | |
61 | ||
62 | #define for_each_power_well_rev(i, power_well, domain_mask, power_domains) \ | |
63 | for (i = (power_domains)->power_well_count - 1; \ | |
64 | i >= 0 && ((power_well) = &(power_domains)->power_wells[i]);\ | |
65 | i--) \ | |
66 | if ((power_well)->domains & (domain_mask)) | |
67 | ||
5aefb239 SS |
68 | bool intel_display_power_well_is_enabled(struct drm_i915_private *dev_priv, |
69 | int power_well_id); | |
70 | ||
e8ca9320 DL |
71 | static void intel_power_well_enable(struct drm_i915_private *dev_priv, |
72 | struct i915_power_well *power_well) | |
73 | { | |
74 | DRM_DEBUG_KMS("enabling %s\n", power_well->name); | |
75 | power_well->ops->enable(dev_priv, power_well); | |
76 | power_well->hw_enabled = true; | |
77 | } | |
78 | ||
dcddab3a DL |
79 | static void intel_power_well_disable(struct drm_i915_private *dev_priv, |
80 | struct i915_power_well *power_well) | |
81 | { | |
82 | DRM_DEBUG_KMS("disabling %s\n", power_well->name); | |
83 | power_well->hw_enabled = false; | |
84 | power_well->ops->disable(dev_priv, power_well); | |
85 | } | |
86 | ||
e4e7684f | 87 | /* |
9c065a7d DV |
88 | * We should only use the power well if we explicitly asked the hardware to |
89 | * enable it, so check if it's enabled and also check if we've requested it to | |
90 | * be enabled. | |
91 | */ | |
92 | static bool hsw_power_well_enabled(struct drm_i915_private *dev_priv, | |
93 | struct i915_power_well *power_well) | |
94 | { | |
95 | return I915_READ(HSW_PWR_WELL_DRIVER) == | |
96 | (HSW_PWR_WELL_ENABLE_REQUEST | HSW_PWR_WELL_STATE_ENABLED); | |
97 | } | |
98 | ||
e4e7684f DV |
99 | /** |
100 | * __intel_display_power_is_enabled - unlocked check for a power domain | |
101 | * @dev_priv: i915 device instance | |
102 | * @domain: power domain to check | |
103 | * | |
104 | * This is the unlocked version of intel_display_power_is_enabled() and should | |
105 | * only be used from error capture and recovery code where deadlocks are | |
106 | * possible. | |
107 | * | |
108 | * Returns: | |
109 | * True when the power domain is enabled, false otherwise. | |
110 | */ | |
f458ebbc DV |
111 | bool __intel_display_power_is_enabled(struct drm_i915_private *dev_priv, |
112 | enum intel_display_power_domain domain) | |
9c065a7d DV |
113 | { |
114 | struct i915_power_domains *power_domains; | |
115 | struct i915_power_well *power_well; | |
116 | bool is_enabled; | |
117 | int i; | |
118 | ||
119 | if (dev_priv->pm.suspended) | |
120 | return false; | |
121 | ||
122 | power_domains = &dev_priv->power_domains; | |
123 | ||
124 | is_enabled = true; | |
125 | ||
126 | for_each_power_well_rev(i, power_well, BIT(domain), power_domains) { | |
127 | if (power_well->always_on) | |
128 | continue; | |
129 | ||
130 | if (!power_well->hw_enabled) { | |
131 | is_enabled = false; | |
132 | break; | |
133 | } | |
134 | } | |
135 | ||
136 | return is_enabled; | |
137 | } | |
138 | ||
e4e7684f | 139 | /** |
f61ccae3 | 140 | * intel_display_power_is_enabled - check for a power domain |
e4e7684f DV |
141 | * @dev_priv: i915 device instance |
142 | * @domain: power domain to check | |
143 | * | |
144 | * This function can be used to check the hw power domain state. It is mostly | |
145 | * used in hardware state readout functions. Everywhere else code should rely | |
146 | * upon explicit power domain reference counting to ensure that the hardware | |
147 | * block is powered up before accessing it. | |
148 | * | |
149 | * Callers must hold the relevant modesetting locks to ensure that concurrent | |
150 | * threads can't disable the power well while the caller tries to read a few | |
151 | * registers. | |
152 | * | |
153 | * Returns: | |
154 | * True when the power domain is enabled, false otherwise. | |
155 | */ | |
f458ebbc DV |
156 | bool intel_display_power_is_enabled(struct drm_i915_private *dev_priv, |
157 | enum intel_display_power_domain domain) | |
9c065a7d DV |
158 | { |
159 | struct i915_power_domains *power_domains; | |
160 | bool ret; | |
161 | ||
162 | power_domains = &dev_priv->power_domains; | |
163 | ||
164 | mutex_lock(&power_domains->lock); | |
f458ebbc | 165 | ret = __intel_display_power_is_enabled(dev_priv, domain); |
9c065a7d DV |
166 | mutex_unlock(&power_domains->lock); |
167 | ||
168 | return ret; | |
169 | } | |
170 | ||
e4e7684f DV |
171 | /** |
172 | * intel_display_set_init_power - set the initial power domain state | |
173 | * @dev_priv: i915 device instance | |
174 | * @enable: whether to enable or disable the initial power domain state | |
175 | * | |
176 | * For simplicity our driver load/unload and system suspend/resume code assumes | |
177 | * that all power domains are always enabled. This functions controls the state | |
178 | * of this little hack. While the initial power domain state is enabled runtime | |
179 | * pm is effectively disabled. | |
180 | */ | |
d9bc89d9 DV |
181 | void intel_display_set_init_power(struct drm_i915_private *dev_priv, |
182 | bool enable) | |
183 | { | |
184 | if (dev_priv->power_domains.init_power_on == enable) | |
185 | return; | |
186 | ||
187 | if (enable) | |
188 | intel_display_power_get(dev_priv, POWER_DOMAIN_INIT); | |
189 | else | |
190 | intel_display_power_put(dev_priv, POWER_DOMAIN_INIT); | |
191 | ||
192 | dev_priv->power_domains.init_power_on = enable; | |
193 | } | |
194 | ||
9c065a7d DV |
195 | /* |
196 | * Starting with Haswell, we have a "Power Down Well" that can be turned off | |
197 | * when not needed anymore. We have 4 registers that can request the power well | |
198 | * to be enabled, and it will only be disabled if none of the registers is | |
199 | * requesting it to be enabled. | |
200 | */ | |
201 | static void hsw_power_well_post_enable(struct drm_i915_private *dev_priv) | |
202 | { | |
203 | struct drm_device *dev = dev_priv->dev; | |
204 | ||
205 | /* | |
206 | * After we re-enable the power well, if we touch VGA register 0x3d5 | |
207 | * we'll get unclaimed register interrupts. This stops after we write | |
208 | * anything to the VGA MSR register. The vgacon module uses this | |
209 | * register all the time, so if we unbind our driver and, as a | |
210 | * consequence, bind vgacon, we'll get stuck in an infinite loop at | |
211 | * console_unlock(). So make here we touch the VGA MSR register, making | |
212 | * sure vgacon can keep working normally without triggering interrupts | |
213 | * and error messages. | |
214 | */ | |
215 | vga_get_uninterruptible(dev->pdev, VGA_RSRC_LEGACY_IO); | |
216 | outb(inb(VGA_MSR_READ), VGA_MSR_WRITE); | |
217 | vga_put(dev->pdev, VGA_RSRC_LEGACY_IO); | |
218 | ||
25400392 | 219 | if (IS_BROADWELL(dev)) |
4c6c03be DL |
220 | gen8_irq_power_well_post_enable(dev_priv, |
221 | 1 << PIPE_C | 1 << PIPE_B); | |
9c065a7d DV |
222 | } |
223 | ||
d14c0343 DL |
224 | static void skl_power_well_post_enable(struct drm_i915_private *dev_priv, |
225 | struct i915_power_well *power_well) | |
226 | { | |
227 | struct drm_device *dev = dev_priv->dev; | |
228 | ||
229 | /* | |
230 | * After we re-enable the power well, if we touch VGA register 0x3d5 | |
231 | * we'll get unclaimed register interrupts. This stops after we write | |
232 | * anything to the VGA MSR register. The vgacon module uses this | |
233 | * register all the time, so if we unbind our driver and, as a | |
234 | * consequence, bind vgacon, we'll get stuck in an infinite loop at | |
235 | * console_unlock(). So make here we touch the VGA MSR register, making | |
236 | * sure vgacon can keep working normally without triggering interrupts | |
237 | * and error messages. | |
238 | */ | |
239 | if (power_well->data == SKL_DISP_PW_2) { | |
240 | vga_get_uninterruptible(dev->pdev, VGA_RSRC_LEGACY_IO); | |
241 | outb(inb(VGA_MSR_READ), VGA_MSR_WRITE); | |
242 | vga_put(dev->pdev, VGA_RSRC_LEGACY_IO); | |
243 | ||
244 | gen8_irq_power_well_post_enable(dev_priv, | |
245 | 1 << PIPE_C | 1 << PIPE_B); | |
246 | } | |
247 | ||
1d2b9526 | 248 | if (power_well->data == SKL_DISP_PW_1) { |
bc5f2ab1 RV |
249 | if (!dev_priv->power_domains.initializing) |
250 | intel_prepare_ddi(dev); | |
d14c0343 | 251 | gen8_irq_power_well_post_enable(dev_priv, 1 << PIPE_A); |
1d2b9526 | 252 | } |
d14c0343 DL |
253 | } |
254 | ||
9c065a7d DV |
255 | static void hsw_set_power_well(struct drm_i915_private *dev_priv, |
256 | struct i915_power_well *power_well, bool enable) | |
257 | { | |
258 | bool is_enabled, enable_requested; | |
259 | uint32_t tmp; | |
260 | ||
261 | tmp = I915_READ(HSW_PWR_WELL_DRIVER); | |
262 | is_enabled = tmp & HSW_PWR_WELL_STATE_ENABLED; | |
263 | enable_requested = tmp & HSW_PWR_WELL_ENABLE_REQUEST; | |
264 | ||
265 | if (enable) { | |
266 | if (!enable_requested) | |
267 | I915_WRITE(HSW_PWR_WELL_DRIVER, | |
268 | HSW_PWR_WELL_ENABLE_REQUEST); | |
269 | ||
270 | if (!is_enabled) { | |
271 | DRM_DEBUG_KMS("Enabling power well\n"); | |
272 | if (wait_for((I915_READ(HSW_PWR_WELL_DRIVER) & | |
273 | HSW_PWR_WELL_STATE_ENABLED), 20)) | |
274 | DRM_ERROR("Timeout enabling power well\n"); | |
6d729bff | 275 | hsw_power_well_post_enable(dev_priv); |
9c065a7d DV |
276 | } |
277 | ||
9c065a7d DV |
278 | } else { |
279 | if (enable_requested) { | |
280 | I915_WRITE(HSW_PWR_WELL_DRIVER, 0); | |
281 | POSTING_READ(HSW_PWR_WELL_DRIVER); | |
282 | DRM_DEBUG_KMS("Requesting to disable the power well\n"); | |
283 | } | |
284 | } | |
285 | } | |
286 | ||
94dd5138 S |
287 | #define SKL_DISPLAY_POWERWELL_2_POWER_DOMAINS ( \ |
288 | BIT(POWER_DOMAIN_TRANSCODER_A) | \ | |
289 | BIT(POWER_DOMAIN_PIPE_B) | \ | |
290 | BIT(POWER_DOMAIN_TRANSCODER_B) | \ | |
291 | BIT(POWER_DOMAIN_PIPE_C) | \ | |
292 | BIT(POWER_DOMAIN_TRANSCODER_C) | \ | |
293 | BIT(POWER_DOMAIN_PIPE_B_PANEL_FITTER) | \ | |
294 | BIT(POWER_DOMAIN_PIPE_C_PANEL_FITTER) | \ | |
295 | BIT(POWER_DOMAIN_PORT_DDI_B_2_LANES) | \ | |
296 | BIT(POWER_DOMAIN_PORT_DDI_B_4_LANES) | \ | |
297 | BIT(POWER_DOMAIN_PORT_DDI_C_2_LANES) | \ | |
298 | BIT(POWER_DOMAIN_PORT_DDI_C_4_LANES) | \ | |
299 | BIT(POWER_DOMAIN_PORT_DDI_D_2_LANES) | \ | |
300 | BIT(POWER_DOMAIN_PORT_DDI_D_4_LANES) | \ | |
d8e19f99 | 301 | BIT(POWER_DOMAIN_PORT_DDI_E_2_LANES) | \ |
94dd5138 S |
302 | BIT(POWER_DOMAIN_AUX_B) | \ |
303 | BIT(POWER_DOMAIN_AUX_C) | \ | |
304 | BIT(POWER_DOMAIN_AUX_D) | \ | |
305 | BIT(POWER_DOMAIN_AUDIO) | \ | |
306 | BIT(POWER_DOMAIN_VGA) | \ | |
307 | BIT(POWER_DOMAIN_INIT)) | |
308 | #define SKL_DISPLAY_POWERWELL_1_POWER_DOMAINS ( \ | |
309 | SKL_DISPLAY_POWERWELL_2_POWER_DOMAINS | \ | |
310 | BIT(POWER_DOMAIN_PLLS) | \ | |
311 | BIT(POWER_DOMAIN_PIPE_A) | \ | |
312 | BIT(POWER_DOMAIN_TRANSCODER_EDP) | \ | |
313 | BIT(POWER_DOMAIN_PIPE_A_PANEL_FITTER) | \ | |
314 | BIT(POWER_DOMAIN_PORT_DDI_A_2_LANES) | \ | |
315 | BIT(POWER_DOMAIN_PORT_DDI_A_4_LANES) | \ | |
316 | BIT(POWER_DOMAIN_AUX_A) | \ | |
317 | BIT(POWER_DOMAIN_INIT)) | |
318 | #define SKL_DISPLAY_DDI_A_E_POWER_DOMAINS ( \ | |
319 | BIT(POWER_DOMAIN_PORT_DDI_A_2_LANES) | \ | |
320 | BIT(POWER_DOMAIN_PORT_DDI_A_4_LANES) | \ | |
d8e19f99 | 321 | BIT(POWER_DOMAIN_PORT_DDI_E_2_LANES) | \ |
94dd5138 S |
322 | BIT(POWER_DOMAIN_INIT)) |
323 | #define SKL_DISPLAY_DDI_B_POWER_DOMAINS ( \ | |
324 | BIT(POWER_DOMAIN_PORT_DDI_B_2_LANES) | \ | |
325 | BIT(POWER_DOMAIN_PORT_DDI_B_4_LANES) | \ | |
326 | BIT(POWER_DOMAIN_INIT)) | |
327 | #define SKL_DISPLAY_DDI_C_POWER_DOMAINS ( \ | |
328 | BIT(POWER_DOMAIN_PORT_DDI_C_2_LANES) | \ | |
329 | BIT(POWER_DOMAIN_PORT_DDI_C_4_LANES) | \ | |
330 | BIT(POWER_DOMAIN_INIT)) | |
331 | #define SKL_DISPLAY_DDI_D_POWER_DOMAINS ( \ | |
332 | BIT(POWER_DOMAIN_PORT_DDI_D_2_LANES) | \ | |
333 | BIT(POWER_DOMAIN_PORT_DDI_D_4_LANES) | \ | |
334 | BIT(POWER_DOMAIN_INIT)) | |
335 | #define SKL_DISPLAY_MISC_IO_POWER_DOMAINS ( \ | |
aeaa2122 | 336 | SKL_DISPLAY_POWERWELL_1_POWER_DOMAINS | \ |
6222709d | 337 | BIT(POWER_DOMAIN_PLLS) | \ |
aeaa2122 | 338 | BIT(POWER_DOMAIN_INIT)) |
94dd5138 S |
339 | #define SKL_DISPLAY_ALWAYS_ON_POWER_DOMAINS ( \ |
340 | (POWER_DOMAIN_MASK & ~(SKL_DISPLAY_POWERWELL_1_POWER_DOMAINS | \ | |
341 | SKL_DISPLAY_POWERWELL_2_POWER_DOMAINS | \ | |
342 | SKL_DISPLAY_DDI_A_E_POWER_DOMAINS | \ | |
343 | SKL_DISPLAY_DDI_B_POWER_DOMAINS | \ | |
344 | SKL_DISPLAY_DDI_C_POWER_DOMAINS | \ | |
345 | SKL_DISPLAY_DDI_D_POWER_DOMAINS | \ | |
346 | SKL_DISPLAY_MISC_IO_POWER_DOMAINS)) | \ | |
347 | BIT(POWER_DOMAIN_INIT)) | |
348 | ||
0b4a2a36 S |
349 | #define BXT_DISPLAY_POWERWELL_2_POWER_DOMAINS ( \ |
350 | BIT(POWER_DOMAIN_TRANSCODER_A) | \ | |
351 | BIT(POWER_DOMAIN_PIPE_B) | \ | |
352 | BIT(POWER_DOMAIN_TRANSCODER_B) | \ | |
353 | BIT(POWER_DOMAIN_PIPE_C) | \ | |
354 | BIT(POWER_DOMAIN_TRANSCODER_C) | \ | |
355 | BIT(POWER_DOMAIN_PIPE_B_PANEL_FITTER) | \ | |
356 | BIT(POWER_DOMAIN_PIPE_C_PANEL_FITTER) | \ | |
357 | BIT(POWER_DOMAIN_PORT_DDI_B_2_LANES) | \ | |
358 | BIT(POWER_DOMAIN_PORT_DDI_B_4_LANES) | \ | |
359 | BIT(POWER_DOMAIN_PORT_DDI_C_2_LANES) | \ | |
360 | BIT(POWER_DOMAIN_PORT_DDI_C_4_LANES) | \ | |
361 | BIT(POWER_DOMAIN_AUX_B) | \ | |
362 | BIT(POWER_DOMAIN_AUX_C) | \ | |
363 | BIT(POWER_DOMAIN_AUDIO) | \ | |
364 | BIT(POWER_DOMAIN_VGA) | \ | |
ac9b8236 | 365 | BIT(POWER_DOMAIN_GMBUS) | \ |
0b4a2a36 S |
366 | BIT(POWER_DOMAIN_INIT)) |
367 | #define BXT_DISPLAY_POWERWELL_1_POWER_DOMAINS ( \ | |
368 | BXT_DISPLAY_POWERWELL_2_POWER_DOMAINS | \ | |
369 | BIT(POWER_DOMAIN_PIPE_A) | \ | |
370 | BIT(POWER_DOMAIN_TRANSCODER_EDP) | \ | |
371 | BIT(POWER_DOMAIN_PIPE_A_PANEL_FITTER) | \ | |
372 | BIT(POWER_DOMAIN_PORT_DDI_A_2_LANES) | \ | |
373 | BIT(POWER_DOMAIN_PORT_DDI_A_4_LANES) | \ | |
374 | BIT(POWER_DOMAIN_AUX_A) | \ | |
375 | BIT(POWER_DOMAIN_PLLS) | \ | |
376 | BIT(POWER_DOMAIN_INIT)) | |
377 | #define BXT_DISPLAY_ALWAYS_ON_POWER_DOMAINS ( \ | |
378 | (POWER_DOMAIN_MASK & ~(BXT_DISPLAY_POWERWELL_1_POWER_DOMAINS | \ | |
379 | BXT_DISPLAY_POWERWELL_2_POWER_DOMAINS)) | \ | |
380 | BIT(POWER_DOMAIN_INIT)) | |
381 | ||
664326f8 SK |
382 | static void assert_can_enable_dc9(struct drm_i915_private *dev_priv) |
383 | { | |
384 | struct drm_device *dev = dev_priv->dev; | |
385 | ||
386 | WARN(!IS_BROXTON(dev), "Platform doesn't support DC9.\n"); | |
387 | WARN((I915_READ(DC_STATE_EN) & DC_STATE_EN_DC9), | |
388 | "DC9 already programmed to be enabled.\n"); | |
389 | WARN(I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC5, | |
390 | "DC5 still not disabled to enable DC9.\n"); | |
391 | WARN(I915_READ(HSW_PWR_WELL_DRIVER), "Power well on.\n"); | |
392 | WARN(intel_irqs_enabled(dev_priv), "Interrupts not disabled yet.\n"); | |
393 | ||
394 | /* | |
395 | * TODO: check for the following to verify the conditions to enter DC9 | |
396 | * state are satisfied: | |
397 | * 1] Check relevant display engine registers to verify if mode set | |
398 | * disable sequence was followed. | |
399 | * 2] Check if display uninitialize sequence is initialized. | |
400 | */ | |
401 | } | |
402 | ||
403 | static void assert_can_disable_dc9(struct drm_i915_private *dev_priv) | |
404 | { | |
405 | WARN(intel_irqs_enabled(dev_priv), "Interrupts not disabled yet.\n"); | |
406 | WARN(!(I915_READ(DC_STATE_EN) & DC_STATE_EN_DC9), | |
407 | "DC9 already programmed to be disabled.\n"); | |
408 | WARN(I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC5, | |
409 | "DC5 still not disabled.\n"); | |
410 | ||
411 | /* | |
412 | * TODO: check for the following to verify DC9 state was indeed | |
413 | * entered before programming to disable it: | |
414 | * 1] Check relevant display engine registers to verify if mode | |
415 | * set disable sequence was followed. | |
416 | * 2] Check if display uninitialize sequence is initialized. | |
417 | */ | |
418 | } | |
419 | ||
420 | void bxt_enable_dc9(struct drm_i915_private *dev_priv) | |
421 | { | |
422 | uint32_t val; | |
423 | ||
424 | assert_can_enable_dc9(dev_priv); | |
425 | ||
426 | DRM_DEBUG_KMS("Enabling DC9\n"); | |
427 | ||
428 | val = I915_READ(DC_STATE_EN); | |
429 | val |= DC_STATE_EN_DC9; | |
430 | I915_WRITE(DC_STATE_EN, val); | |
431 | POSTING_READ(DC_STATE_EN); | |
432 | } | |
433 | ||
434 | void bxt_disable_dc9(struct drm_i915_private *dev_priv) | |
435 | { | |
436 | uint32_t val; | |
437 | ||
438 | assert_can_disable_dc9(dev_priv); | |
439 | ||
440 | DRM_DEBUG_KMS("Disabling DC9\n"); | |
441 | ||
442 | val = I915_READ(DC_STATE_EN); | |
443 | val &= ~DC_STATE_EN_DC9; | |
444 | I915_WRITE(DC_STATE_EN, val); | |
445 | POSTING_READ(DC_STATE_EN); | |
446 | } | |
447 | ||
6b457d31 SK |
448 | static void gen9_set_dc_state_debugmask_memory_up( |
449 | struct drm_i915_private *dev_priv) | |
450 | { | |
451 | uint32_t val; | |
452 | ||
453 | /* The below bit doesn't need to be cleared ever afterwards */ | |
454 | val = I915_READ(DC_STATE_DEBUG); | |
455 | if (!(val & DC_STATE_DEBUG_MASK_MEMORY_UP)) { | |
456 | val |= DC_STATE_DEBUG_MASK_MEMORY_UP; | |
457 | I915_WRITE(DC_STATE_DEBUG, val); | |
458 | POSTING_READ(DC_STATE_DEBUG); | |
459 | } | |
460 | } | |
461 | ||
5aefb239 | 462 | static void assert_can_enable_dc5(struct drm_i915_private *dev_priv) |
dc174300 | 463 | { |
6b457d31 | 464 | struct drm_device *dev = dev_priv->dev; |
5aefb239 SS |
465 | bool pg2_enabled = intel_display_power_well_is_enabled(dev_priv, |
466 | SKL_DISP_PW_2); | |
467 | ||
6ff8ab0d JB |
468 | WARN_ONCE(!IS_SKYLAKE(dev), "Platform doesn't support DC5.\n"); |
469 | WARN_ONCE(!HAS_RUNTIME_PM(dev), "Runtime PM not enabled.\n"); | |
470 | WARN_ONCE(pg2_enabled, "PG2 not disabled to enable DC5.\n"); | |
5aefb239 | 471 | |
6ff8ab0d JB |
472 | WARN_ONCE((I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC5), |
473 | "DC5 already programmed to be enabled.\n"); | |
474 | WARN_ONCE(dev_priv->pm.suspended, | |
475 | "DC5 cannot be enabled, if platform is runtime-suspended.\n"); | |
5aefb239 SS |
476 | |
477 | assert_csr_loaded(dev_priv); | |
478 | } | |
479 | ||
480 | static void assert_can_disable_dc5(struct drm_i915_private *dev_priv) | |
481 | { | |
482 | bool pg2_enabled = intel_display_power_well_is_enabled(dev_priv, | |
483 | SKL_DISP_PW_2); | |
93c7cb6c SS |
484 | /* |
485 | * During initialization, the firmware may not be loaded yet. | |
486 | * We still want to make sure that the DC enabling flag is cleared. | |
487 | */ | |
488 | if (dev_priv->power_domains.initializing) | |
489 | return; | |
5aefb239 | 490 | |
6ff8ab0d JB |
491 | WARN_ONCE(!pg2_enabled, "PG2 not enabled to disable DC5.\n"); |
492 | WARN_ONCE(dev_priv->pm.suspended, | |
5aefb239 SS |
493 | "Disabling of DC5 while platform is runtime-suspended should never happen.\n"); |
494 | } | |
495 | ||
496 | static void gen9_enable_dc5(struct drm_i915_private *dev_priv) | |
497 | { | |
6b457d31 SK |
498 | uint32_t val; |
499 | ||
5aefb239 | 500 | assert_can_enable_dc5(dev_priv); |
6b457d31 SK |
501 | |
502 | DRM_DEBUG_KMS("Enabling DC5\n"); | |
503 | ||
504 | gen9_set_dc_state_debugmask_memory_up(dev_priv); | |
505 | ||
506 | val = I915_READ(DC_STATE_EN); | |
507 | val &= ~DC_STATE_EN_UPTO_DC5_DC6_MASK; | |
508 | val |= DC_STATE_EN_UPTO_DC5; | |
509 | I915_WRITE(DC_STATE_EN, val); | |
510 | POSTING_READ(DC_STATE_EN); | |
dc174300 SS |
511 | } |
512 | ||
513 | static void gen9_disable_dc5(struct drm_i915_private *dev_priv) | |
514 | { | |
6b457d31 SK |
515 | uint32_t val; |
516 | ||
5aefb239 | 517 | assert_can_disable_dc5(dev_priv); |
6b457d31 SK |
518 | |
519 | DRM_DEBUG_KMS("Disabling DC5\n"); | |
520 | ||
521 | val = I915_READ(DC_STATE_EN); | |
522 | val &= ~DC_STATE_EN_UPTO_DC5; | |
523 | I915_WRITE(DC_STATE_EN, val); | |
524 | POSTING_READ(DC_STATE_EN); | |
dc174300 SS |
525 | } |
526 | ||
93c7cb6c | 527 | static void assert_can_enable_dc6(struct drm_i915_private *dev_priv) |
f75a1985 | 528 | { |
74b4f371 | 529 | struct drm_device *dev = dev_priv->dev; |
93c7cb6c | 530 | |
6ff8ab0d JB |
531 | WARN_ONCE(!IS_SKYLAKE(dev), "Platform doesn't support DC6.\n"); |
532 | WARN_ONCE(!HAS_RUNTIME_PM(dev), "Runtime PM not enabled.\n"); | |
533 | WARN_ONCE(I915_READ(UTIL_PIN_CTL) & UTIL_PIN_ENABLE, | |
534 | "Backlight is not disabled.\n"); | |
535 | WARN_ONCE((I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC6), | |
536 | "DC6 already programmed to be enabled.\n"); | |
93c7cb6c SS |
537 | |
538 | assert_csr_loaded(dev_priv); | |
539 | } | |
540 | ||
541 | static void assert_can_disable_dc6(struct drm_i915_private *dev_priv) | |
542 | { | |
543 | /* | |
544 | * During initialization, the firmware may not be loaded yet. | |
545 | * We still want to make sure that the DC enabling flag is cleared. | |
546 | */ | |
547 | if (dev_priv->power_domains.initializing) | |
548 | return; | |
549 | ||
550 | assert_csr_loaded(dev_priv); | |
6ff8ab0d JB |
551 | WARN_ONCE(!(I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC6), |
552 | "DC6 already programmed to be disabled.\n"); | |
93c7cb6c SS |
553 | } |
554 | ||
555 | static void skl_enable_dc6(struct drm_i915_private *dev_priv) | |
556 | { | |
74b4f371 SK |
557 | uint32_t val; |
558 | ||
93c7cb6c | 559 | assert_can_enable_dc6(dev_priv); |
74b4f371 SK |
560 | |
561 | DRM_DEBUG_KMS("Enabling DC6\n"); | |
562 | ||
563 | gen9_set_dc_state_debugmask_memory_up(dev_priv); | |
564 | ||
565 | val = I915_READ(DC_STATE_EN); | |
566 | val &= ~DC_STATE_EN_UPTO_DC5_DC6_MASK; | |
567 | val |= DC_STATE_EN_UPTO_DC6; | |
568 | I915_WRITE(DC_STATE_EN, val); | |
569 | POSTING_READ(DC_STATE_EN); | |
f75a1985 SS |
570 | } |
571 | ||
572 | static void skl_disable_dc6(struct drm_i915_private *dev_priv) | |
573 | { | |
74b4f371 SK |
574 | uint32_t val; |
575 | ||
93c7cb6c | 576 | assert_can_disable_dc6(dev_priv); |
74b4f371 SK |
577 | |
578 | DRM_DEBUG_KMS("Disabling DC6\n"); | |
579 | ||
580 | val = I915_READ(DC_STATE_EN); | |
581 | val &= ~DC_STATE_EN_UPTO_DC6; | |
582 | I915_WRITE(DC_STATE_EN, val); | |
583 | POSTING_READ(DC_STATE_EN); | |
f75a1985 SS |
584 | } |
585 | ||
94dd5138 S |
586 | static void skl_set_power_well(struct drm_i915_private *dev_priv, |
587 | struct i915_power_well *power_well, bool enable) | |
588 | { | |
dc174300 | 589 | struct drm_device *dev = dev_priv->dev; |
94dd5138 S |
590 | uint32_t tmp, fuse_status; |
591 | uint32_t req_mask, state_mask; | |
2a51835f | 592 | bool is_enabled, enable_requested, check_fuse_status = false; |
94dd5138 S |
593 | |
594 | tmp = I915_READ(HSW_PWR_WELL_DRIVER); | |
595 | fuse_status = I915_READ(SKL_FUSE_STATUS); | |
596 | ||
597 | switch (power_well->data) { | |
598 | case SKL_DISP_PW_1: | |
599 | if (wait_for((I915_READ(SKL_FUSE_STATUS) & | |
600 | SKL_FUSE_PG0_DIST_STATUS), 1)) { | |
601 | DRM_ERROR("PG0 not enabled\n"); | |
602 | return; | |
603 | } | |
604 | break; | |
605 | case SKL_DISP_PW_2: | |
606 | if (!(fuse_status & SKL_FUSE_PG1_DIST_STATUS)) { | |
607 | DRM_ERROR("PG1 in disabled state\n"); | |
608 | return; | |
609 | } | |
610 | break; | |
611 | case SKL_DISP_PW_DDI_A_E: | |
612 | case SKL_DISP_PW_DDI_B: | |
613 | case SKL_DISP_PW_DDI_C: | |
614 | case SKL_DISP_PW_DDI_D: | |
615 | case SKL_DISP_PW_MISC_IO: | |
616 | break; | |
617 | default: | |
618 | WARN(1, "Unknown power well %lu\n", power_well->data); | |
619 | return; | |
620 | } | |
621 | ||
622 | req_mask = SKL_POWER_WELL_REQ(power_well->data); | |
2a51835f | 623 | enable_requested = tmp & req_mask; |
94dd5138 | 624 | state_mask = SKL_POWER_WELL_STATE(power_well->data); |
2a51835f | 625 | is_enabled = tmp & state_mask; |
94dd5138 S |
626 | |
627 | if (enable) { | |
2a51835f | 628 | if (!enable_requested) { |
dc174300 SS |
629 | WARN((tmp & state_mask) && |
630 | !I915_READ(HSW_PWR_WELL_BIOS), | |
631 | "Invalid for power well status to be enabled, unless done by the BIOS, \ | |
632 | when request is to disable!\n"); | |
f75a1985 SS |
633 | if ((GEN9_ENABLE_DC5(dev) || SKL_ENABLE_DC6(dev)) && |
634 | power_well->data == SKL_DISP_PW_2) { | |
635 | if (SKL_ENABLE_DC6(dev)) { | |
636 | skl_disable_dc6(dev_priv); | |
637 | /* | |
638 | * DDI buffer programming unnecessary during driver-load/resume | |
639 | * as it's already done during modeset initialization then. | |
640 | * It's also invalid here as encoder list is still uninitialized. | |
641 | */ | |
642 | if (!dev_priv->power_domains.initializing) | |
643 | intel_prepare_ddi(dev); | |
644 | } else { | |
645 | gen9_disable_dc5(dev_priv); | |
646 | } | |
647 | } | |
94dd5138 | 648 | I915_WRITE(HSW_PWR_WELL_DRIVER, tmp | req_mask); |
94dd5138 S |
649 | } |
650 | ||
2a51835f | 651 | if (!is_enabled) { |
510e6fdd | 652 | DRM_DEBUG_KMS("Enabling %s\n", power_well->name); |
94dd5138 S |
653 | if (wait_for((I915_READ(HSW_PWR_WELL_DRIVER) & |
654 | state_mask), 1)) | |
655 | DRM_ERROR("%s enable timeout\n", | |
656 | power_well->name); | |
657 | check_fuse_status = true; | |
658 | } | |
659 | } else { | |
2a51835f | 660 | if (enable_requested) { |
08aef7ca AM |
661 | if (IS_SKYLAKE(dev) && |
662 | (power_well->data == SKL_DISP_PW_1) && | |
663 | (intel_csr_load_status_get(dev_priv) == FW_LOADED)) | |
664 | DRM_DEBUG_KMS("Not Disabling PW1, dmc will handle\n"); | |
665 | else { | |
666 | I915_WRITE(HSW_PWR_WELL_DRIVER, tmp & ~req_mask); | |
667 | POSTING_READ(HSW_PWR_WELL_DRIVER); | |
668 | DRM_DEBUG_KMS("Disabling %s\n", power_well->name); | |
669 | } | |
dc174300 | 670 | |
f75a1985 | 671 | if ((GEN9_ENABLE_DC5(dev) || SKL_ENABLE_DC6(dev)) && |
dc174300 SS |
672 | power_well->data == SKL_DISP_PW_2) { |
673 | enum csr_state state; | |
f75a1985 SS |
674 | /* TODO: wait for a completion event or |
675 | * similar here instead of busy | |
676 | * waiting using wait_for function. | |
677 | */ | |
dc174300 SS |
678 | wait_for((state = intel_csr_load_status_get(dev_priv)) != |
679 | FW_UNINITIALIZED, 1000); | |
680 | if (state != FW_LOADED) | |
6ff8ab0d | 681 | DRM_DEBUG("CSR firmware not ready (%d)\n", |
dc174300 SS |
682 | state); |
683 | else | |
f75a1985 SS |
684 | if (SKL_ENABLE_DC6(dev)) |
685 | skl_enable_dc6(dev_priv); | |
686 | else | |
687 | gen9_enable_dc5(dev_priv); | |
dc174300 | 688 | } |
94dd5138 S |
689 | } |
690 | } | |
691 | ||
692 | if (check_fuse_status) { | |
693 | if (power_well->data == SKL_DISP_PW_1) { | |
694 | if (wait_for((I915_READ(SKL_FUSE_STATUS) & | |
695 | SKL_FUSE_PG1_DIST_STATUS), 1)) | |
696 | DRM_ERROR("PG1 distributing status timeout\n"); | |
697 | } else if (power_well->data == SKL_DISP_PW_2) { | |
698 | if (wait_for((I915_READ(SKL_FUSE_STATUS) & | |
699 | SKL_FUSE_PG2_DIST_STATUS), 1)) | |
700 | DRM_ERROR("PG2 distributing status timeout\n"); | |
701 | } | |
702 | } | |
d14c0343 DL |
703 | |
704 | if (enable && !is_enabled) | |
705 | skl_power_well_post_enable(dev_priv, power_well); | |
94dd5138 S |
706 | } |
707 | ||
9c065a7d DV |
708 | static void hsw_power_well_sync_hw(struct drm_i915_private *dev_priv, |
709 | struct i915_power_well *power_well) | |
710 | { | |
711 | hsw_set_power_well(dev_priv, power_well, power_well->count > 0); | |
712 | ||
713 | /* | |
714 | * We're taking over the BIOS, so clear any requests made by it since | |
715 | * the driver is in charge now. | |
716 | */ | |
717 | if (I915_READ(HSW_PWR_WELL_BIOS) & HSW_PWR_WELL_ENABLE_REQUEST) | |
718 | I915_WRITE(HSW_PWR_WELL_BIOS, 0); | |
719 | } | |
720 | ||
721 | static void hsw_power_well_enable(struct drm_i915_private *dev_priv, | |
722 | struct i915_power_well *power_well) | |
723 | { | |
724 | hsw_set_power_well(dev_priv, power_well, true); | |
725 | } | |
726 | ||
727 | static void hsw_power_well_disable(struct drm_i915_private *dev_priv, | |
728 | struct i915_power_well *power_well) | |
729 | { | |
730 | hsw_set_power_well(dev_priv, power_well, false); | |
731 | } | |
732 | ||
94dd5138 S |
733 | static bool skl_power_well_enabled(struct drm_i915_private *dev_priv, |
734 | struct i915_power_well *power_well) | |
735 | { | |
736 | uint32_t mask = SKL_POWER_WELL_REQ(power_well->data) | | |
737 | SKL_POWER_WELL_STATE(power_well->data); | |
738 | ||
739 | return (I915_READ(HSW_PWR_WELL_DRIVER) & mask) == mask; | |
740 | } | |
741 | ||
742 | static void skl_power_well_sync_hw(struct drm_i915_private *dev_priv, | |
743 | struct i915_power_well *power_well) | |
744 | { | |
745 | skl_set_power_well(dev_priv, power_well, power_well->count > 0); | |
746 | ||
747 | /* Clear any request made by BIOS as driver is taking over */ | |
748 | I915_WRITE(HSW_PWR_WELL_BIOS, 0); | |
749 | } | |
750 | ||
751 | static void skl_power_well_enable(struct drm_i915_private *dev_priv, | |
752 | struct i915_power_well *power_well) | |
753 | { | |
754 | skl_set_power_well(dev_priv, power_well, true); | |
755 | } | |
756 | ||
757 | static void skl_power_well_disable(struct drm_i915_private *dev_priv, | |
758 | struct i915_power_well *power_well) | |
759 | { | |
760 | skl_set_power_well(dev_priv, power_well, false); | |
761 | } | |
762 | ||
9c065a7d DV |
763 | static void i9xx_always_on_power_well_noop(struct drm_i915_private *dev_priv, |
764 | struct i915_power_well *power_well) | |
765 | { | |
766 | } | |
767 | ||
768 | static bool i9xx_always_on_power_well_enabled(struct drm_i915_private *dev_priv, | |
769 | struct i915_power_well *power_well) | |
770 | { | |
771 | return true; | |
772 | } | |
773 | ||
774 | static void vlv_set_power_well(struct drm_i915_private *dev_priv, | |
775 | struct i915_power_well *power_well, bool enable) | |
776 | { | |
777 | enum punit_power_well power_well_id = power_well->data; | |
778 | u32 mask; | |
779 | u32 state; | |
780 | u32 ctrl; | |
781 | ||
782 | mask = PUNIT_PWRGT_MASK(power_well_id); | |
783 | state = enable ? PUNIT_PWRGT_PWR_ON(power_well_id) : | |
784 | PUNIT_PWRGT_PWR_GATE(power_well_id); | |
785 | ||
786 | mutex_lock(&dev_priv->rps.hw_lock); | |
787 | ||
788 | #define COND \ | |
789 | ((vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_STATUS) & mask) == state) | |
790 | ||
791 | if (COND) | |
792 | goto out; | |
793 | ||
794 | ctrl = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL); | |
795 | ctrl &= ~mask; | |
796 | ctrl |= state; | |
797 | vlv_punit_write(dev_priv, PUNIT_REG_PWRGT_CTRL, ctrl); | |
798 | ||
799 | if (wait_for(COND, 100)) | |
7e35ab88 | 800 | DRM_ERROR("timeout setting power well state %08x (%08x)\n", |
9c065a7d DV |
801 | state, |
802 | vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL)); | |
803 | ||
804 | #undef COND | |
805 | ||
806 | out: | |
807 | mutex_unlock(&dev_priv->rps.hw_lock); | |
808 | } | |
809 | ||
810 | static void vlv_power_well_sync_hw(struct drm_i915_private *dev_priv, | |
811 | struct i915_power_well *power_well) | |
812 | { | |
813 | vlv_set_power_well(dev_priv, power_well, power_well->count > 0); | |
814 | } | |
815 | ||
816 | static void vlv_power_well_enable(struct drm_i915_private *dev_priv, | |
817 | struct i915_power_well *power_well) | |
818 | { | |
819 | vlv_set_power_well(dev_priv, power_well, true); | |
820 | } | |
821 | ||
822 | static void vlv_power_well_disable(struct drm_i915_private *dev_priv, | |
823 | struct i915_power_well *power_well) | |
824 | { | |
825 | vlv_set_power_well(dev_priv, power_well, false); | |
826 | } | |
827 | ||
828 | static bool vlv_power_well_enabled(struct drm_i915_private *dev_priv, | |
829 | struct i915_power_well *power_well) | |
830 | { | |
831 | int power_well_id = power_well->data; | |
832 | bool enabled = false; | |
833 | u32 mask; | |
834 | u32 state; | |
835 | u32 ctrl; | |
836 | ||
837 | mask = PUNIT_PWRGT_MASK(power_well_id); | |
838 | ctrl = PUNIT_PWRGT_PWR_ON(power_well_id); | |
839 | ||
840 | mutex_lock(&dev_priv->rps.hw_lock); | |
841 | ||
842 | state = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_STATUS) & mask; | |
843 | /* | |
844 | * We only ever set the power-on and power-gate states, anything | |
845 | * else is unexpected. | |
846 | */ | |
847 | WARN_ON(state != PUNIT_PWRGT_PWR_ON(power_well_id) && | |
848 | state != PUNIT_PWRGT_PWR_GATE(power_well_id)); | |
849 | if (state == ctrl) | |
850 | enabled = true; | |
851 | ||
852 | /* | |
853 | * A transient state at this point would mean some unexpected party | |
854 | * is poking at the power controls too. | |
855 | */ | |
856 | ctrl = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL) & mask; | |
857 | WARN_ON(ctrl != state); | |
858 | ||
859 | mutex_unlock(&dev_priv->rps.hw_lock); | |
860 | ||
861 | return enabled; | |
862 | } | |
863 | ||
2be7d540 | 864 | static void vlv_display_power_well_init(struct drm_i915_private *dev_priv) |
9c065a7d | 865 | { |
5a8fbb7d VS |
866 | enum pipe pipe; |
867 | ||
868 | /* | |
869 | * Enable the CRI clock source so we can get at the | |
870 | * display and the reference clock for VGA | |
871 | * hotplug / manual detection. Supposedly DSI also | |
872 | * needs the ref clock up and running. | |
873 | * | |
874 | * CHV DPLL B/C have some issues if VGA mode is enabled. | |
875 | */ | |
876 | for_each_pipe(dev_priv->dev, pipe) { | |
877 | u32 val = I915_READ(DPLL(pipe)); | |
878 | ||
879 | val |= DPLL_REF_CLK_ENABLE_VLV | DPLL_VGA_MODE_DIS; | |
880 | if (pipe != PIPE_A) | |
881 | val |= DPLL_INTEGRATED_CRI_CLK_VLV; | |
882 | ||
883 | I915_WRITE(DPLL(pipe), val); | |
884 | } | |
9c065a7d DV |
885 | |
886 | spin_lock_irq(&dev_priv->irq_lock); | |
887 | valleyview_enable_display_irqs(dev_priv); | |
888 | spin_unlock_irq(&dev_priv->irq_lock); | |
889 | ||
890 | /* | |
891 | * During driver initialization/resume we can avoid restoring the | |
892 | * part of the HW/SW state that will be inited anyway explicitly. | |
893 | */ | |
894 | if (dev_priv->power_domains.initializing) | |
895 | return; | |
896 | ||
b963291c | 897 | intel_hpd_init(dev_priv); |
9c065a7d DV |
898 | |
899 | i915_redisable_vga_power_on(dev_priv->dev); | |
900 | } | |
901 | ||
2be7d540 VS |
902 | static void vlv_display_power_well_deinit(struct drm_i915_private *dev_priv) |
903 | { | |
904 | spin_lock_irq(&dev_priv->irq_lock); | |
905 | valleyview_disable_display_irqs(dev_priv); | |
906 | spin_unlock_irq(&dev_priv->irq_lock); | |
907 | ||
908 | vlv_power_sequencer_reset(dev_priv); | |
909 | } | |
910 | ||
911 | static void vlv_display_power_well_enable(struct drm_i915_private *dev_priv, | |
912 | struct i915_power_well *power_well) | |
913 | { | |
914 | WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DISP2D); | |
915 | ||
916 | vlv_set_power_well(dev_priv, power_well, true); | |
917 | ||
918 | vlv_display_power_well_init(dev_priv); | |
919 | } | |
920 | ||
9c065a7d DV |
921 | static void vlv_display_power_well_disable(struct drm_i915_private *dev_priv, |
922 | struct i915_power_well *power_well) | |
923 | { | |
924 | WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DISP2D); | |
925 | ||
2be7d540 | 926 | vlv_display_power_well_deinit(dev_priv); |
9c065a7d DV |
927 | |
928 | vlv_set_power_well(dev_priv, power_well, false); | |
9c065a7d DV |
929 | } |
930 | ||
931 | static void vlv_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv, | |
932 | struct i915_power_well *power_well) | |
933 | { | |
934 | WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DPIO_CMN_BC); | |
935 | ||
5a8fbb7d | 936 | /* since ref/cri clock was enabled */ |
9c065a7d DV |
937 | udelay(1); /* >10ns for cmnreset, >0ns for sidereset */ |
938 | ||
939 | vlv_set_power_well(dev_priv, power_well, true); | |
940 | ||
941 | /* | |
942 | * From VLV2A0_DP_eDP_DPIO_driver_vbios_notes_10.docx - | |
943 | * 6. De-assert cmn_reset/side_reset. Same as VLV X0. | |
944 | * a. GUnit 0x2110 bit[0] set to 1 (def 0) | |
945 | * b. The other bits such as sfr settings / modesel may all | |
946 | * be set to 0. | |
947 | * | |
948 | * This should only be done on init and resume from S3 with | |
949 | * both PLLs disabled, or we risk losing DPIO and PLL | |
950 | * synchronization. | |
951 | */ | |
952 | I915_WRITE(DPIO_CTL, I915_READ(DPIO_CTL) | DPIO_CMNRST); | |
953 | } | |
954 | ||
955 | static void vlv_dpio_cmn_power_well_disable(struct drm_i915_private *dev_priv, | |
956 | struct i915_power_well *power_well) | |
957 | { | |
958 | enum pipe pipe; | |
959 | ||
960 | WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DPIO_CMN_BC); | |
961 | ||
962 | for_each_pipe(dev_priv, pipe) | |
963 | assert_pll_disabled(dev_priv, pipe); | |
964 | ||
965 | /* Assert common reset */ | |
966 | I915_WRITE(DPIO_CTL, I915_READ(DPIO_CTL) & ~DPIO_CMNRST); | |
967 | ||
968 | vlv_set_power_well(dev_priv, power_well, false); | |
969 | } | |
970 | ||
30142273 VS |
971 | #define POWER_DOMAIN_MASK (BIT(POWER_DOMAIN_NUM) - 1) |
972 | ||
973 | static struct i915_power_well *lookup_power_well(struct drm_i915_private *dev_priv, | |
974 | int power_well_id) | |
975 | { | |
976 | struct i915_power_domains *power_domains = &dev_priv->power_domains; | |
977 | struct i915_power_well *power_well; | |
978 | int i; | |
979 | ||
980 | for_each_power_well(i, power_well, POWER_DOMAIN_MASK, power_domains) { | |
981 | if (power_well->data == power_well_id) | |
982 | return power_well; | |
983 | } | |
984 | ||
985 | return NULL; | |
986 | } | |
987 | ||
988 | #define BITS_SET(val, bits) (((val) & (bits)) == (bits)) | |
989 | ||
990 | static void assert_chv_phy_status(struct drm_i915_private *dev_priv) | |
991 | { | |
992 | struct i915_power_well *cmn_bc = | |
993 | lookup_power_well(dev_priv, PUNIT_POWER_WELL_DPIO_CMN_BC); | |
994 | struct i915_power_well *cmn_d = | |
995 | lookup_power_well(dev_priv, PUNIT_POWER_WELL_DPIO_CMN_D); | |
996 | u32 phy_control = dev_priv->chv_phy_control; | |
997 | u32 phy_status = 0; | |
3be60de9 | 998 | u32 phy_status_mask = 0xffffffff; |
30142273 VS |
999 | u32 tmp; |
1000 | ||
3be60de9 VS |
1001 | /* |
1002 | * The BIOS can leave the PHY is some weird state | |
1003 | * where it doesn't fully power down some parts. | |
1004 | * Disable the asserts until the PHY has been fully | |
1005 | * reset (ie. the power well has been disabled at | |
1006 | * least once). | |
1007 | */ | |
1008 | if (!dev_priv->chv_phy_assert[DPIO_PHY0]) | |
1009 | phy_status_mask &= ~(PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH0) | | |
1010 | PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 0) | | |
1011 | PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 1) | | |
1012 | PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH1) | | |
1013 | PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 0) | | |
1014 | PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 1)); | |
1015 | ||
1016 | if (!dev_priv->chv_phy_assert[DPIO_PHY1]) | |
1017 | phy_status_mask &= ~(PHY_STATUS_CMN_LDO(DPIO_PHY1, DPIO_CH0) | | |
1018 | PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 0) | | |
1019 | PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 1)); | |
1020 | ||
30142273 VS |
1021 | if (cmn_bc->ops->is_enabled(dev_priv, cmn_bc)) { |
1022 | phy_status |= PHY_POWERGOOD(DPIO_PHY0); | |
1023 | ||
1024 | /* this assumes override is only used to enable lanes */ | |
1025 | if ((phy_control & PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH0)) == 0) | |
1026 | phy_control |= PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH0); | |
1027 | ||
1028 | if ((phy_control & PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH1)) == 0) | |
1029 | phy_control |= PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH1); | |
1030 | ||
1031 | /* CL1 is on whenever anything is on in either channel */ | |
1032 | if (BITS_SET(phy_control, | |
1033 | PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH0) | | |
1034 | PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH1))) | |
1035 | phy_status |= PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH0); | |
1036 | ||
1037 | /* | |
1038 | * The DPLLB check accounts for the pipe B + port A usage | |
1039 | * with CL2 powered up but all the lanes in the second channel | |
1040 | * powered down. | |
1041 | */ | |
1042 | if (BITS_SET(phy_control, | |
1043 | PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH1)) && | |
1044 | (I915_READ(DPLL(PIPE_B)) & DPLL_VCO_ENABLE) == 0) | |
1045 | phy_status |= PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH1); | |
1046 | ||
1047 | if (BITS_SET(phy_control, | |
1048 | PHY_CH_POWER_DOWN_OVRD(0x3, DPIO_PHY0, DPIO_CH0))) | |
1049 | phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 0); | |
1050 | if (BITS_SET(phy_control, | |
1051 | PHY_CH_POWER_DOWN_OVRD(0xc, DPIO_PHY0, DPIO_CH0))) | |
1052 | phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 1); | |
1053 | ||
1054 | if (BITS_SET(phy_control, | |
1055 | PHY_CH_POWER_DOWN_OVRD(0x3, DPIO_PHY0, DPIO_CH1))) | |
1056 | phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 0); | |
1057 | if (BITS_SET(phy_control, | |
1058 | PHY_CH_POWER_DOWN_OVRD(0xc, DPIO_PHY0, DPIO_CH1))) | |
1059 | phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 1); | |
1060 | } | |
1061 | ||
1062 | if (cmn_d->ops->is_enabled(dev_priv, cmn_d)) { | |
1063 | phy_status |= PHY_POWERGOOD(DPIO_PHY1); | |
1064 | ||
1065 | /* this assumes override is only used to enable lanes */ | |
1066 | if ((phy_control & PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY1, DPIO_CH0)) == 0) | |
1067 | phy_control |= PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY1, DPIO_CH0); | |
1068 | ||
1069 | if (BITS_SET(phy_control, | |
1070 | PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY1, DPIO_CH0))) | |
1071 | phy_status |= PHY_STATUS_CMN_LDO(DPIO_PHY1, DPIO_CH0); | |
1072 | ||
1073 | if (BITS_SET(phy_control, | |
1074 | PHY_CH_POWER_DOWN_OVRD(0x3, DPIO_PHY1, DPIO_CH0))) | |
1075 | phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 0); | |
1076 | if (BITS_SET(phy_control, | |
1077 | PHY_CH_POWER_DOWN_OVRD(0xc, DPIO_PHY1, DPIO_CH0))) | |
1078 | phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 1); | |
1079 | } | |
1080 | ||
3be60de9 VS |
1081 | phy_status &= phy_status_mask; |
1082 | ||
30142273 VS |
1083 | /* |
1084 | * The PHY may be busy with some initial calibration and whatnot, | |
1085 | * so the power state can take a while to actually change. | |
1086 | */ | |
3be60de9 | 1087 | if (wait_for((tmp = I915_READ(DISPLAY_PHY_STATUS) & phy_status_mask) == phy_status, 10)) |
30142273 VS |
1088 | WARN(phy_status != tmp, |
1089 | "Unexpected PHY_STATUS 0x%08x, expected 0x%08x (PHY_CONTROL=0x%08x)\n", | |
1090 | tmp, phy_status, dev_priv->chv_phy_control); | |
1091 | } | |
1092 | ||
1093 | #undef BITS_SET | |
1094 | ||
9c065a7d DV |
1095 | static void chv_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv, |
1096 | struct i915_power_well *power_well) | |
1097 | { | |
1098 | enum dpio_phy phy; | |
e0fce78f VS |
1099 | enum pipe pipe; |
1100 | uint32_t tmp; | |
9c065a7d DV |
1101 | |
1102 | WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DPIO_CMN_BC && | |
1103 | power_well->data != PUNIT_POWER_WELL_DPIO_CMN_D); | |
1104 | ||
e0fce78f VS |
1105 | if (power_well->data == PUNIT_POWER_WELL_DPIO_CMN_BC) { |
1106 | pipe = PIPE_A; | |
9c065a7d | 1107 | phy = DPIO_PHY0; |
e0fce78f VS |
1108 | } else { |
1109 | pipe = PIPE_C; | |
9c065a7d | 1110 | phy = DPIO_PHY1; |
e0fce78f | 1111 | } |
5a8fbb7d VS |
1112 | |
1113 | /* since ref/cri clock was enabled */ | |
9c065a7d DV |
1114 | udelay(1); /* >10ns for cmnreset, >0ns for sidereset */ |
1115 | vlv_set_power_well(dev_priv, power_well, true); | |
1116 | ||
1117 | /* Poll for phypwrgood signal */ | |
1118 | if (wait_for(I915_READ(DISPLAY_PHY_STATUS) & PHY_POWERGOOD(phy), 1)) | |
1119 | DRM_ERROR("Display PHY %d is not power up\n", phy); | |
1120 | ||
e0fce78f VS |
1121 | mutex_lock(&dev_priv->sb_lock); |
1122 | ||
1123 | /* Enable dynamic power down */ | |
1124 | tmp = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW28); | |
ee279218 VS |
1125 | tmp |= DPIO_DYNPWRDOWNEN_CH0 | DPIO_CL1POWERDOWNEN | |
1126 | DPIO_SUS_CLK_CONFIG_GATE_CLKREQ; | |
e0fce78f VS |
1127 | vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW28, tmp); |
1128 | ||
1129 | if (power_well->data == PUNIT_POWER_WELL_DPIO_CMN_BC) { | |
1130 | tmp = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW6_CH1); | |
1131 | tmp |= DPIO_DYNPWRDOWNEN_CH1; | |
1132 | vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW6_CH1, tmp); | |
3e288786 VS |
1133 | } else { |
1134 | /* | |
1135 | * Force the non-existing CL2 off. BXT does this | |
1136 | * too, so maybe it saves some power even though | |
1137 | * CL2 doesn't exist? | |
1138 | */ | |
1139 | tmp = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW30); | |
1140 | tmp |= DPIO_CL2_LDOFUSE_PWRENB; | |
1141 | vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW30, tmp); | |
e0fce78f VS |
1142 | } |
1143 | ||
1144 | mutex_unlock(&dev_priv->sb_lock); | |
1145 | ||
70722468 VS |
1146 | dev_priv->chv_phy_control |= PHY_COM_LANE_RESET_DEASSERT(phy); |
1147 | I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control); | |
e0fce78f VS |
1148 | |
1149 | DRM_DEBUG_KMS("Enabled DPIO PHY%d (PHY_CONTROL=0x%08x)\n", | |
1150 | phy, dev_priv->chv_phy_control); | |
30142273 VS |
1151 | |
1152 | assert_chv_phy_status(dev_priv); | |
9c065a7d DV |
1153 | } |
1154 | ||
1155 | static void chv_dpio_cmn_power_well_disable(struct drm_i915_private *dev_priv, | |
1156 | struct i915_power_well *power_well) | |
1157 | { | |
1158 | enum dpio_phy phy; | |
1159 | ||
1160 | WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DPIO_CMN_BC && | |
1161 | power_well->data != PUNIT_POWER_WELL_DPIO_CMN_D); | |
1162 | ||
1163 | if (power_well->data == PUNIT_POWER_WELL_DPIO_CMN_BC) { | |
1164 | phy = DPIO_PHY0; | |
1165 | assert_pll_disabled(dev_priv, PIPE_A); | |
1166 | assert_pll_disabled(dev_priv, PIPE_B); | |
1167 | } else { | |
1168 | phy = DPIO_PHY1; | |
1169 | assert_pll_disabled(dev_priv, PIPE_C); | |
1170 | } | |
1171 | ||
70722468 VS |
1172 | dev_priv->chv_phy_control &= ~PHY_COM_LANE_RESET_DEASSERT(phy); |
1173 | I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control); | |
9c065a7d DV |
1174 | |
1175 | vlv_set_power_well(dev_priv, power_well, false); | |
e0fce78f VS |
1176 | |
1177 | DRM_DEBUG_KMS("Disabled DPIO PHY%d (PHY_CONTROL=0x%08x)\n", | |
1178 | phy, dev_priv->chv_phy_control); | |
30142273 | 1179 | |
3be60de9 VS |
1180 | /* PHY is fully reset now, so we can enable the PHY state asserts */ |
1181 | dev_priv->chv_phy_assert[phy] = true; | |
1182 | ||
30142273 | 1183 | assert_chv_phy_status(dev_priv); |
e0fce78f VS |
1184 | } |
1185 | ||
6669e39f VS |
1186 | static void assert_chv_phy_powergate(struct drm_i915_private *dev_priv, enum dpio_phy phy, |
1187 | enum dpio_channel ch, bool override, unsigned int mask) | |
1188 | { | |
1189 | enum pipe pipe = phy == DPIO_PHY0 ? PIPE_A : PIPE_C; | |
1190 | u32 reg, val, expected, actual; | |
1191 | ||
3be60de9 VS |
1192 | /* |
1193 | * The BIOS can leave the PHY is some weird state | |
1194 | * where it doesn't fully power down some parts. | |
1195 | * Disable the asserts until the PHY has been fully | |
1196 | * reset (ie. the power well has been disabled at | |
1197 | * least once). | |
1198 | */ | |
1199 | if (!dev_priv->chv_phy_assert[phy]) | |
1200 | return; | |
1201 | ||
6669e39f VS |
1202 | if (ch == DPIO_CH0) |
1203 | reg = _CHV_CMN_DW0_CH0; | |
1204 | else | |
1205 | reg = _CHV_CMN_DW6_CH1; | |
1206 | ||
1207 | mutex_lock(&dev_priv->sb_lock); | |
1208 | val = vlv_dpio_read(dev_priv, pipe, reg); | |
1209 | mutex_unlock(&dev_priv->sb_lock); | |
1210 | ||
1211 | /* | |
1212 | * This assumes !override is only used when the port is disabled. | |
1213 | * All lanes should power down even without the override when | |
1214 | * the port is disabled. | |
1215 | */ | |
1216 | if (!override || mask == 0xf) { | |
1217 | expected = DPIO_ALLDL_POWERDOWN | DPIO_ANYDL_POWERDOWN; | |
1218 | /* | |
1219 | * If CH1 common lane is not active anymore | |
1220 | * (eg. for pipe B DPLL) the entire channel will | |
1221 | * shut down, which causes the common lane registers | |
1222 | * to read as 0. That means we can't actually check | |
1223 | * the lane power down status bits, but as the entire | |
1224 | * register reads as 0 it's a good indication that the | |
1225 | * channel is indeed entirely powered down. | |
1226 | */ | |
1227 | if (ch == DPIO_CH1 && val == 0) | |
1228 | expected = 0; | |
1229 | } else if (mask != 0x0) { | |
1230 | expected = DPIO_ANYDL_POWERDOWN; | |
1231 | } else { | |
1232 | expected = 0; | |
1233 | } | |
1234 | ||
1235 | if (ch == DPIO_CH0) | |
1236 | actual = val >> DPIO_ANYDL_POWERDOWN_SHIFT_CH0; | |
1237 | else | |
1238 | actual = val >> DPIO_ANYDL_POWERDOWN_SHIFT_CH1; | |
1239 | actual &= DPIO_ALLDL_POWERDOWN | DPIO_ANYDL_POWERDOWN; | |
1240 | ||
1241 | WARN(actual != expected, | |
1242 | "Unexpected DPIO lane power down: all %d, any %d. Expected: all %d, any %d. (0x%x = 0x%08x)\n", | |
1243 | !!(actual & DPIO_ALLDL_POWERDOWN), !!(actual & DPIO_ANYDL_POWERDOWN), | |
1244 | !!(expected & DPIO_ALLDL_POWERDOWN), !!(expected & DPIO_ANYDL_POWERDOWN), | |
1245 | reg, val); | |
1246 | } | |
1247 | ||
b0b33846 VS |
1248 | bool chv_phy_powergate_ch(struct drm_i915_private *dev_priv, enum dpio_phy phy, |
1249 | enum dpio_channel ch, bool override) | |
1250 | { | |
1251 | struct i915_power_domains *power_domains = &dev_priv->power_domains; | |
1252 | bool was_override; | |
1253 | ||
1254 | mutex_lock(&power_domains->lock); | |
1255 | ||
1256 | was_override = dev_priv->chv_phy_control & PHY_CH_POWER_DOWN_OVRD_EN(phy, ch); | |
1257 | ||
1258 | if (override == was_override) | |
1259 | goto out; | |
1260 | ||
1261 | if (override) | |
1262 | dev_priv->chv_phy_control |= PHY_CH_POWER_DOWN_OVRD_EN(phy, ch); | |
1263 | else | |
1264 | dev_priv->chv_phy_control &= ~PHY_CH_POWER_DOWN_OVRD_EN(phy, ch); | |
1265 | ||
1266 | I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control); | |
1267 | ||
1268 | DRM_DEBUG_KMS("Power gating DPIO PHY%d CH%d (DPIO_PHY_CONTROL=0x%08x)\n", | |
1269 | phy, ch, dev_priv->chv_phy_control); | |
1270 | ||
30142273 VS |
1271 | assert_chv_phy_status(dev_priv); |
1272 | ||
b0b33846 VS |
1273 | out: |
1274 | mutex_unlock(&power_domains->lock); | |
1275 | ||
1276 | return was_override; | |
1277 | } | |
1278 | ||
e0fce78f VS |
1279 | void chv_phy_powergate_lanes(struct intel_encoder *encoder, |
1280 | bool override, unsigned int mask) | |
1281 | { | |
1282 | struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); | |
1283 | struct i915_power_domains *power_domains = &dev_priv->power_domains; | |
1284 | enum dpio_phy phy = vlv_dport_to_phy(enc_to_dig_port(&encoder->base)); | |
1285 | enum dpio_channel ch = vlv_dport_to_channel(enc_to_dig_port(&encoder->base)); | |
1286 | ||
1287 | mutex_lock(&power_domains->lock); | |
1288 | ||
1289 | dev_priv->chv_phy_control &= ~PHY_CH_POWER_DOWN_OVRD(0xf, phy, ch); | |
1290 | dev_priv->chv_phy_control |= PHY_CH_POWER_DOWN_OVRD(mask, phy, ch); | |
1291 | ||
1292 | if (override) | |
1293 | dev_priv->chv_phy_control |= PHY_CH_POWER_DOWN_OVRD_EN(phy, ch); | |
1294 | else | |
1295 | dev_priv->chv_phy_control &= ~PHY_CH_POWER_DOWN_OVRD_EN(phy, ch); | |
1296 | ||
1297 | I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control); | |
1298 | ||
1299 | DRM_DEBUG_KMS("Power gating DPIO PHY%d CH%d lanes 0x%x (PHY_CONTROL=0x%08x)\n", | |
1300 | phy, ch, mask, dev_priv->chv_phy_control); | |
1301 | ||
30142273 VS |
1302 | assert_chv_phy_status(dev_priv); |
1303 | ||
6669e39f VS |
1304 | assert_chv_phy_powergate(dev_priv, phy, ch, override, mask); |
1305 | ||
e0fce78f | 1306 | mutex_unlock(&power_domains->lock); |
9c065a7d DV |
1307 | } |
1308 | ||
1309 | static bool chv_pipe_power_well_enabled(struct drm_i915_private *dev_priv, | |
1310 | struct i915_power_well *power_well) | |
1311 | { | |
1312 | enum pipe pipe = power_well->data; | |
1313 | bool enabled; | |
1314 | u32 state, ctrl; | |
1315 | ||
1316 | mutex_lock(&dev_priv->rps.hw_lock); | |
1317 | ||
1318 | state = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) & DP_SSS_MASK(pipe); | |
1319 | /* | |
1320 | * We only ever set the power-on and power-gate states, anything | |
1321 | * else is unexpected. | |
1322 | */ | |
1323 | WARN_ON(state != DP_SSS_PWR_ON(pipe) && state != DP_SSS_PWR_GATE(pipe)); | |
1324 | enabled = state == DP_SSS_PWR_ON(pipe); | |
1325 | ||
1326 | /* | |
1327 | * A transient state at this point would mean some unexpected party | |
1328 | * is poking at the power controls too. | |
1329 | */ | |
1330 | ctrl = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) & DP_SSC_MASK(pipe); | |
1331 | WARN_ON(ctrl << 16 != state); | |
1332 | ||
1333 | mutex_unlock(&dev_priv->rps.hw_lock); | |
1334 | ||
1335 | return enabled; | |
1336 | } | |
1337 | ||
1338 | static void chv_set_pipe_power_well(struct drm_i915_private *dev_priv, | |
1339 | struct i915_power_well *power_well, | |
1340 | bool enable) | |
1341 | { | |
1342 | enum pipe pipe = power_well->data; | |
1343 | u32 state; | |
1344 | u32 ctrl; | |
1345 | ||
1346 | state = enable ? DP_SSS_PWR_ON(pipe) : DP_SSS_PWR_GATE(pipe); | |
1347 | ||
1348 | mutex_lock(&dev_priv->rps.hw_lock); | |
1349 | ||
1350 | #define COND \ | |
1351 | ((vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) & DP_SSS_MASK(pipe)) == state) | |
1352 | ||
1353 | if (COND) | |
1354 | goto out; | |
1355 | ||
1356 | ctrl = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ); | |
1357 | ctrl &= ~DP_SSC_MASK(pipe); | |
1358 | ctrl |= enable ? DP_SSC_PWR_ON(pipe) : DP_SSC_PWR_GATE(pipe); | |
1359 | vlv_punit_write(dev_priv, PUNIT_REG_DSPFREQ, ctrl); | |
1360 | ||
1361 | if (wait_for(COND, 100)) | |
7e35ab88 | 1362 | DRM_ERROR("timeout setting power well state %08x (%08x)\n", |
9c065a7d DV |
1363 | state, |
1364 | vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ)); | |
1365 | ||
1366 | #undef COND | |
1367 | ||
1368 | out: | |
1369 | mutex_unlock(&dev_priv->rps.hw_lock); | |
1370 | } | |
1371 | ||
1372 | static void chv_pipe_power_well_sync_hw(struct drm_i915_private *dev_priv, | |
1373 | struct i915_power_well *power_well) | |
1374 | { | |
8fcd5cd8 VS |
1375 | WARN_ON_ONCE(power_well->data != PIPE_A); |
1376 | ||
9c065a7d DV |
1377 | chv_set_pipe_power_well(dev_priv, power_well, power_well->count > 0); |
1378 | } | |
1379 | ||
1380 | static void chv_pipe_power_well_enable(struct drm_i915_private *dev_priv, | |
1381 | struct i915_power_well *power_well) | |
1382 | { | |
8fcd5cd8 | 1383 | WARN_ON_ONCE(power_well->data != PIPE_A); |
9c065a7d DV |
1384 | |
1385 | chv_set_pipe_power_well(dev_priv, power_well, true); | |
afd6275d | 1386 | |
2be7d540 | 1387 | vlv_display_power_well_init(dev_priv); |
9c065a7d DV |
1388 | } |
1389 | ||
1390 | static void chv_pipe_power_well_disable(struct drm_i915_private *dev_priv, | |
1391 | struct i915_power_well *power_well) | |
1392 | { | |
8fcd5cd8 VS |
1393 | WARN_ON_ONCE(power_well->data != PIPE_A); |
1394 | ||
2be7d540 | 1395 | vlv_display_power_well_deinit(dev_priv); |
afd6275d | 1396 | |
9c065a7d DV |
1397 | chv_set_pipe_power_well(dev_priv, power_well, false); |
1398 | } | |
1399 | ||
e4e7684f DV |
1400 | /** |
1401 | * intel_display_power_get - grab a power domain reference | |
1402 | * @dev_priv: i915 device instance | |
1403 | * @domain: power domain to reference | |
1404 | * | |
1405 | * This function grabs a power domain reference for @domain and ensures that the | |
1406 | * power domain and all its parents are powered up. Therefore users should only | |
1407 | * grab a reference to the innermost power domain they need. | |
1408 | * | |
1409 | * Any power domain reference obtained by this function must have a symmetric | |
1410 | * call to intel_display_power_put() to release the reference again. | |
1411 | */ | |
9c065a7d DV |
1412 | void intel_display_power_get(struct drm_i915_private *dev_priv, |
1413 | enum intel_display_power_domain domain) | |
1414 | { | |
1415 | struct i915_power_domains *power_domains; | |
1416 | struct i915_power_well *power_well; | |
1417 | int i; | |
1418 | ||
1419 | intel_runtime_pm_get(dev_priv); | |
1420 | ||
1421 | power_domains = &dev_priv->power_domains; | |
1422 | ||
1423 | mutex_lock(&power_domains->lock); | |
1424 | ||
1425 | for_each_power_well(i, power_well, BIT(domain), power_domains) { | |
e8ca9320 DL |
1426 | if (!power_well->count++) |
1427 | intel_power_well_enable(dev_priv, power_well); | |
9c065a7d DV |
1428 | } |
1429 | ||
1430 | power_domains->domain_use_count[domain]++; | |
1431 | ||
1432 | mutex_unlock(&power_domains->lock); | |
1433 | } | |
1434 | ||
e4e7684f DV |
1435 | /** |
1436 | * intel_display_power_put - release a power domain reference | |
1437 | * @dev_priv: i915 device instance | |
1438 | * @domain: power domain to reference | |
1439 | * | |
1440 | * This function drops the power domain reference obtained by | |
1441 | * intel_display_power_get() and might power down the corresponding hardware | |
1442 | * block right away if this is the last reference. | |
1443 | */ | |
9c065a7d DV |
1444 | void intel_display_power_put(struct drm_i915_private *dev_priv, |
1445 | enum intel_display_power_domain domain) | |
1446 | { | |
1447 | struct i915_power_domains *power_domains; | |
1448 | struct i915_power_well *power_well; | |
1449 | int i; | |
1450 | ||
1451 | power_domains = &dev_priv->power_domains; | |
1452 | ||
1453 | mutex_lock(&power_domains->lock); | |
1454 | ||
1455 | WARN_ON(!power_domains->domain_use_count[domain]); | |
1456 | power_domains->domain_use_count[domain]--; | |
1457 | ||
1458 | for_each_power_well_rev(i, power_well, BIT(domain), power_domains) { | |
1459 | WARN_ON(!power_well->count); | |
1460 | ||
dcddab3a DL |
1461 | if (!--power_well->count && i915.disable_power_well) |
1462 | intel_power_well_disable(dev_priv, power_well); | |
9c065a7d DV |
1463 | } |
1464 | ||
1465 | mutex_unlock(&power_domains->lock); | |
1466 | ||
1467 | intel_runtime_pm_put(dev_priv); | |
1468 | } | |
1469 | ||
9c065a7d DV |
1470 | #define HSW_ALWAYS_ON_POWER_DOMAINS ( \ |
1471 | BIT(POWER_DOMAIN_PIPE_A) | \ | |
1472 | BIT(POWER_DOMAIN_TRANSCODER_EDP) | \ | |
1473 | BIT(POWER_DOMAIN_PORT_DDI_A_2_LANES) | \ | |
1474 | BIT(POWER_DOMAIN_PORT_DDI_A_4_LANES) | \ | |
1475 | BIT(POWER_DOMAIN_PORT_DDI_B_2_LANES) | \ | |
1476 | BIT(POWER_DOMAIN_PORT_DDI_B_4_LANES) | \ | |
1477 | BIT(POWER_DOMAIN_PORT_DDI_C_2_LANES) | \ | |
1478 | BIT(POWER_DOMAIN_PORT_DDI_C_4_LANES) | \ | |
1479 | BIT(POWER_DOMAIN_PORT_DDI_D_2_LANES) | \ | |
1480 | BIT(POWER_DOMAIN_PORT_DDI_D_4_LANES) | \ | |
1481 | BIT(POWER_DOMAIN_PORT_CRT) | \ | |
1482 | BIT(POWER_DOMAIN_PLLS) | \ | |
1407121a S |
1483 | BIT(POWER_DOMAIN_AUX_A) | \ |
1484 | BIT(POWER_DOMAIN_AUX_B) | \ | |
1485 | BIT(POWER_DOMAIN_AUX_C) | \ | |
1486 | BIT(POWER_DOMAIN_AUX_D) | \ | |
ac9b8236 | 1487 | BIT(POWER_DOMAIN_GMBUS) | \ |
9c065a7d DV |
1488 | BIT(POWER_DOMAIN_INIT)) |
1489 | #define HSW_DISPLAY_POWER_DOMAINS ( \ | |
1490 | (POWER_DOMAIN_MASK & ~HSW_ALWAYS_ON_POWER_DOMAINS) | \ | |
1491 | BIT(POWER_DOMAIN_INIT)) | |
1492 | ||
1493 | #define BDW_ALWAYS_ON_POWER_DOMAINS ( \ | |
1494 | HSW_ALWAYS_ON_POWER_DOMAINS | \ | |
1495 | BIT(POWER_DOMAIN_PIPE_A_PANEL_FITTER)) | |
1496 | #define BDW_DISPLAY_POWER_DOMAINS ( \ | |
1497 | (POWER_DOMAIN_MASK & ~BDW_ALWAYS_ON_POWER_DOMAINS) | \ | |
1498 | BIT(POWER_DOMAIN_INIT)) | |
1499 | ||
1500 | #define VLV_ALWAYS_ON_POWER_DOMAINS BIT(POWER_DOMAIN_INIT) | |
1501 | #define VLV_DISPLAY_POWER_DOMAINS POWER_DOMAIN_MASK | |
1502 | ||
1503 | #define VLV_DPIO_CMN_BC_POWER_DOMAINS ( \ | |
1504 | BIT(POWER_DOMAIN_PORT_DDI_B_2_LANES) | \ | |
1505 | BIT(POWER_DOMAIN_PORT_DDI_B_4_LANES) | \ | |
1506 | BIT(POWER_DOMAIN_PORT_DDI_C_2_LANES) | \ | |
1507 | BIT(POWER_DOMAIN_PORT_DDI_C_4_LANES) | \ | |
1508 | BIT(POWER_DOMAIN_PORT_CRT) | \ | |
1407121a S |
1509 | BIT(POWER_DOMAIN_AUX_B) | \ |
1510 | BIT(POWER_DOMAIN_AUX_C) | \ | |
9c065a7d DV |
1511 | BIT(POWER_DOMAIN_INIT)) |
1512 | ||
1513 | #define VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS ( \ | |
1514 | BIT(POWER_DOMAIN_PORT_DDI_B_2_LANES) | \ | |
1515 | BIT(POWER_DOMAIN_PORT_DDI_B_4_LANES) | \ | |
1407121a | 1516 | BIT(POWER_DOMAIN_AUX_B) | \ |
9c065a7d DV |
1517 | BIT(POWER_DOMAIN_INIT)) |
1518 | ||
1519 | #define VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS ( \ | |
1520 | BIT(POWER_DOMAIN_PORT_DDI_B_4_LANES) | \ | |
1407121a | 1521 | BIT(POWER_DOMAIN_AUX_B) | \ |
9c065a7d DV |
1522 | BIT(POWER_DOMAIN_INIT)) |
1523 | ||
1524 | #define VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS ( \ | |
1525 | BIT(POWER_DOMAIN_PORT_DDI_C_2_LANES) | \ | |
1526 | BIT(POWER_DOMAIN_PORT_DDI_C_4_LANES) | \ | |
1407121a | 1527 | BIT(POWER_DOMAIN_AUX_C) | \ |
9c065a7d DV |
1528 | BIT(POWER_DOMAIN_INIT)) |
1529 | ||
1530 | #define VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS ( \ | |
1531 | BIT(POWER_DOMAIN_PORT_DDI_C_4_LANES) | \ | |
1407121a | 1532 | BIT(POWER_DOMAIN_AUX_C) | \ |
9c065a7d DV |
1533 | BIT(POWER_DOMAIN_INIT)) |
1534 | ||
9c065a7d DV |
1535 | #define CHV_DPIO_CMN_BC_POWER_DOMAINS ( \ |
1536 | BIT(POWER_DOMAIN_PORT_DDI_B_2_LANES) | \ | |
1537 | BIT(POWER_DOMAIN_PORT_DDI_B_4_LANES) | \ | |
1538 | BIT(POWER_DOMAIN_PORT_DDI_C_2_LANES) | \ | |
1539 | BIT(POWER_DOMAIN_PORT_DDI_C_4_LANES) | \ | |
1407121a S |
1540 | BIT(POWER_DOMAIN_AUX_B) | \ |
1541 | BIT(POWER_DOMAIN_AUX_C) | \ | |
9c065a7d DV |
1542 | BIT(POWER_DOMAIN_INIT)) |
1543 | ||
1544 | #define CHV_DPIO_CMN_D_POWER_DOMAINS ( \ | |
1545 | BIT(POWER_DOMAIN_PORT_DDI_D_2_LANES) | \ | |
1546 | BIT(POWER_DOMAIN_PORT_DDI_D_4_LANES) | \ | |
1407121a | 1547 | BIT(POWER_DOMAIN_AUX_D) | \ |
9c065a7d DV |
1548 | BIT(POWER_DOMAIN_INIT)) |
1549 | ||
9c065a7d DV |
1550 | static const struct i915_power_well_ops i9xx_always_on_power_well_ops = { |
1551 | .sync_hw = i9xx_always_on_power_well_noop, | |
1552 | .enable = i9xx_always_on_power_well_noop, | |
1553 | .disable = i9xx_always_on_power_well_noop, | |
1554 | .is_enabled = i9xx_always_on_power_well_enabled, | |
1555 | }; | |
1556 | ||
1557 | static const struct i915_power_well_ops chv_pipe_power_well_ops = { | |
1558 | .sync_hw = chv_pipe_power_well_sync_hw, | |
1559 | .enable = chv_pipe_power_well_enable, | |
1560 | .disable = chv_pipe_power_well_disable, | |
1561 | .is_enabled = chv_pipe_power_well_enabled, | |
1562 | }; | |
1563 | ||
1564 | static const struct i915_power_well_ops chv_dpio_cmn_power_well_ops = { | |
1565 | .sync_hw = vlv_power_well_sync_hw, | |
1566 | .enable = chv_dpio_cmn_power_well_enable, | |
1567 | .disable = chv_dpio_cmn_power_well_disable, | |
1568 | .is_enabled = vlv_power_well_enabled, | |
1569 | }; | |
1570 | ||
1571 | static struct i915_power_well i9xx_always_on_power_well[] = { | |
1572 | { | |
1573 | .name = "always-on", | |
1574 | .always_on = 1, | |
1575 | .domains = POWER_DOMAIN_MASK, | |
1576 | .ops = &i9xx_always_on_power_well_ops, | |
1577 | }, | |
1578 | }; | |
1579 | ||
1580 | static const struct i915_power_well_ops hsw_power_well_ops = { | |
1581 | .sync_hw = hsw_power_well_sync_hw, | |
1582 | .enable = hsw_power_well_enable, | |
1583 | .disable = hsw_power_well_disable, | |
1584 | .is_enabled = hsw_power_well_enabled, | |
1585 | }; | |
1586 | ||
94dd5138 S |
1587 | static const struct i915_power_well_ops skl_power_well_ops = { |
1588 | .sync_hw = skl_power_well_sync_hw, | |
1589 | .enable = skl_power_well_enable, | |
1590 | .disable = skl_power_well_disable, | |
1591 | .is_enabled = skl_power_well_enabled, | |
1592 | }; | |
1593 | ||
9c065a7d DV |
1594 | static struct i915_power_well hsw_power_wells[] = { |
1595 | { | |
1596 | .name = "always-on", | |
1597 | .always_on = 1, | |
1598 | .domains = HSW_ALWAYS_ON_POWER_DOMAINS, | |
1599 | .ops = &i9xx_always_on_power_well_ops, | |
1600 | }, | |
1601 | { | |
1602 | .name = "display", | |
1603 | .domains = HSW_DISPLAY_POWER_DOMAINS, | |
1604 | .ops = &hsw_power_well_ops, | |
1605 | }, | |
1606 | }; | |
1607 | ||
1608 | static struct i915_power_well bdw_power_wells[] = { | |
1609 | { | |
1610 | .name = "always-on", | |
1611 | .always_on = 1, | |
1612 | .domains = BDW_ALWAYS_ON_POWER_DOMAINS, | |
1613 | .ops = &i9xx_always_on_power_well_ops, | |
1614 | }, | |
1615 | { | |
1616 | .name = "display", | |
1617 | .domains = BDW_DISPLAY_POWER_DOMAINS, | |
1618 | .ops = &hsw_power_well_ops, | |
1619 | }, | |
1620 | }; | |
1621 | ||
1622 | static const struct i915_power_well_ops vlv_display_power_well_ops = { | |
1623 | .sync_hw = vlv_power_well_sync_hw, | |
1624 | .enable = vlv_display_power_well_enable, | |
1625 | .disable = vlv_display_power_well_disable, | |
1626 | .is_enabled = vlv_power_well_enabled, | |
1627 | }; | |
1628 | ||
1629 | static const struct i915_power_well_ops vlv_dpio_cmn_power_well_ops = { | |
1630 | .sync_hw = vlv_power_well_sync_hw, | |
1631 | .enable = vlv_dpio_cmn_power_well_enable, | |
1632 | .disable = vlv_dpio_cmn_power_well_disable, | |
1633 | .is_enabled = vlv_power_well_enabled, | |
1634 | }; | |
1635 | ||
1636 | static const struct i915_power_well_ops vlv_dpio_power_well_ops = { | |
1637 | .sync_hw = vlv_power_well_sync_hw, | |
1638 | .enable = vlv_power_well_enable, | |
1639 | .disable = vlv_power_well_disable, | |
1640 | .is_enabled = vlv_power_well_enabled, | |
1641 | }; | |
1642 | ||
1643 | static struct i915_power_well vlv_power_wells[] = { | |
1644 | { | |
1645 | .name = "always-on", | |
1646 | .always_on = 1, | |
1647 | .domains = VLV_ALWAYS_ON_POWER_DOMAINS, | |
1648 | .ops = &i9xx_always_on_power_well_ops, | |
1649 | }, | |
1650 | { | |
1651 | .name = "display", | |
1652 | .domains = VLV_DISPLAY_POWER_DOMAINS, | |
1653 | .data = PUNIT_POWER_WELL_DISP2D, | |
1654 | .ops = &vlv_display_power_well_ops, | |
1655 | }, | |
1656 | { | |
1657 | .name = "dpio-tx-b-01", | |
1658 | .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS | | |
1659 | VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS | | |
1660 | VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS | | |
1661 | VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS, | |
1662 | .ops = &vlv_dpio_power_well_ops, | |
1663 | .data = PUNIT_POWER_WELL_DPIO_TX_B_LANES_01, | |
1664 | }, | |
1665 | { | |
1666 | .name = "dpio-tx-b-23", | |
1667 | .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS | | |
1668 | VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS | | |
1669 | VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS | | |
1670 | VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS, | |
1671 | .ops = &vlv_dpio_power_well_ops, | |
1672 | .data = PUNIT_POWER_WELL_DPIO_TX_B_LANES_23, | |
1673 | }, | |
1674 | { | |
1675 | .name = "dpio-tx-c-01", | |
1676 | .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS | | |
1677 | VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS | | |
1678 | VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS | | |
1679 | VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS, | |
1680 | .ops = &vlv_dpio_power_well_ops, | |
1681 | .data = PUNIT_POWER_WELL_DPIO_TX_C_LANES_01, | |
1682 | }, | |
1683 | { | |
1684 | .name = "dpio-tx-c-23", | |
1685 | .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS | | |
1686 | VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS | | |
1687 | VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS | | |
1688 | VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS, | |
1689 | .ops = &vlv_dpio_power_well_ops, | |
1690 | .data = PUNIT_POWER_WELL_DPIO_TX_C_LANES_23, | |
1691 | }, | |
1692 | { | |
1693 | .name = "dpio-common", | |
1694 | .domains = VLV_DPIO_CMN_BC_POWER_DOMAINS, | |
1695 | .data = PUNIT_POWER_WELL_DPIO_CMN_BC, | |
1696 | .ops = &vlv_dpio_cmn_power_well_ops, | |
1697 | }, | |
1698 | }; | |
1699 | ||
1700 | static struct i915_power_well chv_power_wells[] = { | |
1701 | { | |
1702 | .name = "always-on", | |
1703 | .always_on = 1, | |
1704 | .domains = VLV_ALWAYS_ON_POWER_DOMAINS, | |
1705 | .ops = &i9xx_always_on_power_well_ops, | |
1706 | }, | |
9c065a7d DV |
1707 | { |
1708 | .name = "display", | |
baa4e575 | 1709 | /* |
fde61e4b VS |
1710 | * Pipe A power well is the new disp2d well. Pipe B and C |
1711 | * power wells don't actually exist. Pipe A power well is | |
1712 | * required for any pipe to work. | |
baa4e575 | 1713 | */ |
fde61e4b | 1714 | .domains = VLV_DISPLAY_POWER_DOMAINS, |
9c065a7d DV |
1715 | .data = PIPE_A, |
1716 | .ops = &chv_pipe_power_well_ops, | |
1717 | }, | |
9c065a7d DV |
1718 | { |
1719 | .name = "dpio-common-bc", | |
71849b67 | 1720 | .domains = CHV_DPIO_CMN_BC_POWER_DOMAINS, |
9c065a7d DV |
1721 | .data = PUNIT_POWER_WELL_DPIO_CMN_BC, |
1722 | .ops = &chv_dpio_cmn_power_well_ops, | |
1723 | }, | |
1724 | { | |
1725 | .name = "dpio-common-d", | |
71849b67 | 1726 | .domains = CHV_DPIO_CMN_D_POWER_DOMAINS, |
9c065a7d DV |
1727 | .data = PUNIT_POWER_WELL_DPIO_CMN_D, |
1728 | .ops = &chv_dpio_cmn_power_well_ops, | |
1729 | }, | |
9c065a7d DV |
1730 | }; |
1731 | ||
5aefb239 SS |
1732 | bool intel_display_power_well_is_enabled(struct drm_i915_private *dev_priv, |
1733 | int power_well_id) | |
1734 | { | |
1735 | struct i915_power_well *power_well; | |
1736 | bool ret; | |
1737 | ||
1738 | power_well = lookup_power_well(dev_priv, power_well_id); | |
1739 | ret = power_well->ops->is_enabled(dev_priv, power_well); | |
1740 | ||
1741 | return ret; | |
1742 | } | |
1743 | ||
94dd5138 S |
1744 | static struct i915_power_well skl_power_wells[] = { |
1745 | { | |
1746 | .name = "always-on", | |
1747 | .always_on = 1, | |
1748 | .domains = SKL_DISPLAY_ALWAYS_ON_POWER_DOMAINS, | |
1749 | .ops = &i9xx_always_on_power_well_ops, | |
1750 | }, | |
1751 | { | |
1752 | .name = "power well 1", | |
1753 | .domains = SKL_DISPLAY_POWERWELL_1_POWER_DOMAINS, | |
1754 | .ops = &skl_power_well_ops, | |
1755 | .data = SKL_DISP_PW_1, | |
1756 | }, | |
1757 | { | |
1758 | .name = "MISC IO power well", | |
1759 | .domains = SKL_DISPLAY_MISC_IO_POWER_DOMAINS, | |
1760 | .ops = &skl_power_well_ops, | |
1761 | .data = SKL_DISP_PW_MISC_IO, | |
1762 | }, | |
1763 | { | |
1764 | .name = "power well 2", | |
1765 | .domains = SKL_DISPLAY_POWERWELL_2_POWER_DOMAINS, | |
1766 | .ops = &skl_power_well_ops, | |
1767 | .data = SKL_DISP_PW_2, | |
1768 | }, | |
1769 | { | |
1770 | .name = "DDI A/E power well", | |
1771 | .domains = SKL_DISPLAY_DDI_A_E_POWER_DOMAINS, | |
1772 | .ops = &skl_power_well_ops, | |
1773 | .data = SKL_DISP_PW_DDI_A_E, | |
1774 | }, | |
1775 | { | |
1776 | .name = "DDI B power well", | |
1777 | .domains = SKL_DISPLAY_DDI_B_POWER_DOMAINS, | |
1778 | .ops = &skl_power_well_ops, | |
1779 | .data = SKL_DISP_PW_DDI_B, | |
1780 | }, | |
1781 | { | |
1782 | .name = "DDI C power well", | |
1783 | .domains = SKL_DISPLAY_DDI_C_POWER_DOMAINS, | |
1784 | .ops = &skl_power_well_ops, | |
1785 | .data = SKL_DISP_PW_DDI_C, | |
1786 | }, | |
1787 | { | |
1788 | .name = "DDI D power well", | |
1789 | .domains = SKL_DISPLAY_DDI_D_POWER_DOMAINS, | |
1790 | .ops = &skl_power_well_ops, | |
1791 | .data = SKL_DISP_PW_DDI_D, | |
1792 | }, | |
1793 | }; | |
1794 | ||
0b4a2a36 S |
1795 | static struct i915_power_well bxt_power_wells[] = { |
1796 | { | |
1797 | .name = "always-on", | |
1798 | .always_on = 1, | |
1799 | .domains = BXT_DISPLAY_ALWAYS_ON_POWER_DOMAINS, | |
1800 | .ops = &i9xx_always_on_power_well_ops, | |
1801 | }, | |
1802 | { | |
1803 | .name = "power well 1", | |
1804 | .domains = BXT_DISPLAY_POWERWELL_1_POWER_DOMAINS, | |
1805 | .ops = &skl_power_well_ops, | |
1806 | .data = SKL_DISP_PW_1, | |
1807 | }, | |
1808 | { | |
1809 | .name = "power well 2", | |
1810 | .domains = BXT_DISPLAY_POWERWELL_2_POWER_DOMAINS, | |
1811 | .ops = &skl_power_well_ops, | |
1812 | .data = SKL_DISP_PW_2, | |
1813 | } | |
1814 | }; | |
1815 | ||
1b0e3a04 ID |
1816 | static int |
1817 | sanitize_disable_power_well_option(const struct drm_i915_private *dev_priv, | |
1818 | int disable_power_well) | |
1819 | { | |
1820 | if (disable_power_well >= 0) | |
1821 | return !!disable_power_well; | |
1822 | ||
1823 | if (IS_SKYLAKE(dev_priv)) { | |
1824 | DRM_DEBUG_KMS("Disabling display power well support\n"); | |
1825 | return 0; | |
1826 | } | |
1827 | ||
1828 | return 1; | |
1829 | } | |
1830 | ||
9c065a7d DV |
1831 | #define set_power_wells(power_domains, __power_wells) ({ \ |
1832 | (power_domains)->power_wells = (__power_wells); \ | |
1833 | (power_domains)->power_well_count = ARRAY_SIZE(__power_wells); \ | |
1834 | }) | |
1835 | ||
e4e7684f DV |
1836 | /** |
1837 | * intel_power_domains_init - initializes the power domain structures | |
1838 | * @dev_priv: i915 device instance | |
1839 | * | |
1840 | * Initializes the power domain structures for @dev_priv depending upon the | |
1841 | * supported platform. | |
1842 | */ | |
9c065a7d DV |
1843 | int intel_power_domains_init(struct drm_i915_private *dev_priv) |
1844 | { | |
1845 | struct i915_power_domains *power_domains = &dev_priv->power_domains; | |
1846 | ||
1b0e3a04 ID |
1847 | i915.disable_power_well = sanitize_disable_power_well_option(dev_priv, |
1848 | i915.disable_power_well); | |
1849 | ||
ac9b8236 VS |
1850 | BUILD_BUG_ON(POWER_DOMAIN_NUM > 31); |
1851 | ||
9c065a7d DV |
1852 | mutex_init(&power_domains->lock); |
1853 | ||
1854 | /* | |
1855 | * The enabling order will be from lower to higher indexed wells, | |
1856 | * the disabling order is reversed. | |
1857 | */ | |
1858 | if (IS_HASWELL(dev_priv->dev)) { | |
1859 | set_power_wells(power_domains, hsw_power_wells); | |
9c065a7d DV |
1860 | } else if (IS_BROADWELL(dev_priv->dev)) { |
1861 | set_power_wells(power_domains, bdw_power_wells); | |
94dd5138 S |
1862 | } else if (IS_SKYLAKE(dev_priv->dev)) { |
1863 | set_power_wells(power_domains, skl_power_wells); | |
0b4a2a36 S |
1864 | } else if (IS_BROXTON(dev_priv->dev)) { |
1865 | set_power_wells(power_domains, bxt_power_wells); | |
9c065a7d DV |
1866 | } else if (IS_CHERRYVIEW(dev_priv->dev)) { |
1867 | set_power_wells(power_domains, chv_power_wells); | |
1868 | } else if (IS_VALLEYVIEW(dev_priv->dev)) { | |
1869 | set_power_wells(power_domains, vlv_power_wells); | |
1870 | } else { | |
1871 | set_power_wells(power_domains, i9xx_always_on_power_well); | |
1872 | } | |
1873 | ||
1874 | return 0; | |
1875 | } | |
1876 | ||
41373cd5 DV |
1877 | static void intel_runtime_pm_disable(struct drm_i915_private *dev_priv) |
1878 | { | |
1879 | struct drm_device *dev = dev_priv->dev; | |
1880 | struct device *device = &dev->pdev->dev; | |
1881 | ||
1882 | if (!HAS_RUNTIME_PM(dev)) | |
1883 | return; | |
1884 | ||
1885 | if (!intel_enable_rc6(dev)) | |
1886 | return; | |
1887 | ||
1888 | /* Make sure we're not suspended first. */ | |
1889 | pm_runtime_get_sync(device); | |
41373cd5 DV |
1890 | } |
1891 | ||
e4e7684f DV |
1892 | /** |
1893 | * intel_power_domains_fini - finalizes the power domain structures | |
1894 | * @dev_priv: i915 device instance | |
1895 | * | |
1896 | * Finalizes the power domain structures for @dev_priv depending upon the | |
1897 | * supported platform. This function also disables runtime pm and ensures that | |
1898 | * the device stays powered up so that the driver can be reloaded. | |
1899 | */ | |
f458ebbc | 1900 | void intel_power_domains_fini(struct drm_i915_private *dev_priv) |
9c065a7d | 1901 | { |
41373cd5 DV |
1902 | intel_runtime_pm_disable(dev_priv); |
1903 | ||
f458ebbc DV |
1904 | /* The i915.ko module is still not prepared to be loaded when |
1905 | * the power well is not enabled, so just enable it in case | |
1906 | * we're going to unload/reload. */ | |
1907 | intel_display_set_init_power(dev_priv, true); | |
9c065a7d DV |
1908 | } |
1909 | ||
1910 | static void intel_power_domains_resume(struct drm_i915_private *dev_priv) | |
1911 | { | |
1912 | struct i915_power_domains *power_domains = &dev_priv->power_domains; | |
1913 | struct i915_power_well *power_well; | |
1914 | int i; | |
1915 | ||
1916 | mutex_lock(&power_domains->lock); | |
1917 | for_each_power_well(i, power_well, POWER_DOMAIN_MASK, power_domains) { | |
1918 | power_well->ops->sync_hw(dev_priv, power_well); | |
1919 | power_well->hw_enabled = power_well->ops->is_enabled(dev_priv, | |
1920 | power_well); | |
1921 | } | |
1922 | mutex_unlock(&power_domains->lock); | |
1923 | } | |
1924 | ||
70722468 VS |
1925 | static void chv_phy_control_init(struct drm_i915_private *dev_priv) |
1926 | { | |
1927 | struct i915_power_well *cmn_bc = | |
1928 | lookup_power_well(dev_priv, PUNIT_POWER_WELL_DPIO_CMN_BC); | |
1929 | struct i915_power_well *cmn_d = | |
1930 | lookup_power_well(dev_priv, PUNIT_POWER_WELL_DPIO_CMN_D); | |
1931 | ||
1932 | /* | |
1933 | * DISPLAY_PHY_CONTROL can get corrupted if read. As a | |
1934 | * workaround never ever read DISPLAY_PHY_CONTROL, and | |
1935 | * instead maintain a shadow copy ourselves. Use the actual | |
e0fce78f VS |
1936 | * power well state and lane status to reconstruct the |
1937 | * expected initial value. | |
70722468 VS |
1938 | */ |
1939 | dev_priv->chv_phy_control = | |
bc284542 VS |
1940 | PHY_LDO_SEQ_DELAY(PHY_LDO_DELAY_600NS, DPIO_PHY0) | |
1941 | PHY_LDO_SEQ_DELAY(PHY_LDO_DELAY_600NS, DPIO_PHY1) | | |
e0fce78f VS |
1942 | PHY_CH_POWER_MODE(PHY_CH_DEEP_PSR, DPIO_PHY0, DPIO_CH0) | |
1943 | PHY_CH_POWER_MODE(PHY_CH_DEEP_PSR, DPIO_PHY0, DPIO_CH1) | | |
1944 | PHY_CH_POWER_MODE(PHY_CH_DEEP_PSR, DPIO_PHY1, DPIO_CH0); | |
1945 | ||
1946 | /* | |
1947 | * If all lanes are disabled we leave the override disabled | |
1948 | * with all power down bits cleared to match the state we | |
1949 | * would use after disabling the port. Otherwise enable the | |
1950 | * override and set the lane powerdown bits accding to the | |
1951 | * current lane status. | |
1952 | */ | |
1953 | if (cmn_bc->ops->is_enabled(dev_priv, cmn_bc)) { | |
1954 | uint32_t status = I915_READ(DPLL(PIPE_A)); | |
1955 | unsigned int mask; | |
1956 | ||
1957 | mask = status & DPLL_PORTB_READY_MASK; | |
1958 | if (mask == 0xf) | |
1959 | mask = 0x0; | |
1960 | else | |
1961 | dev_priv->chv_phy_control |= | |
1962 | PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH0); | |
1963 | ||
1964 | dev_priv->chv_phy_control |= | |
1965 | PHY_CH_POWER_DOWN_OVRD(mask, DPIO_PHY0, DPIO_CH0); | |
1966 | ||
1967 | mask = (status & DPLL_PORTC_READY_MASK) >> 4; | |
1968 | if (mask == 0xf) | |
1969 | mask = 0x0; | |
1970 | else | |
1971 | dev_priv->chv_phy_control |= | |
1972 | PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH1); | |
1973 | ||
1974 | dev_priv->chv_phy_control |= | |
1975 | PHY_CH_POWER_DOWN_OVRD(mask, DPIO_PHY0, DPIO_CH1); | |
1976 | ||
70722468 | 1977 | dev_priv->chv_phy_control |= PHY_COM_LANE_RESET_DEASSERT(DPIO_PHY0); |
3be60de9 VS |
1978 | |
1979 | dev_priv->chv_phy_assert[DPIO_PHY0] = false; | |
1980 | } else { | |
1981 | dev_priv->chv_phy_assert[DPIO_PHY0] = true; | |
e0fce78f VS |
1982 | } |
1983 | ||
1984 | if (cmn_d->ops->is_enabled(dev_priv, cmn_d)) { | |
1985 | uint32_t status = I915_READ(DPIO_PHY_STATUS); | |
1986 | unsigned int mask; | |
1987 | ||
1988 | mask = status & DPLL_PORTD_READY_MASK; | |
1989 | ||
1990 | if (mask == 0xf) | |
1991 | mask = 0x0; | |
1992 | else | |
1993 | dev_priv->chv_phy_control |= | |
1994 | PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY1, DPIO_CH0); | |
1995 | ||
1996 | dev_priv->chv_phy_control |= | |
1997 | PHY_CH_POWER_DOWN_OVRD(mask, DPIO_PHY1, DPIO_CH0); | |
1998 | ||
70722468 | 1999 | dev_priv->chv_phy_control |= PHY_COM_LANE_RESET_DEASSERT(DPIO_PHY1); |
3be60de9 VS |
2000 | |
2001 | dev_priv->chv_phy_assert[DPIO_PHY1] = false; | |
2002 | } else { | |
2003 | dev_priv->chv_phy_assert[DPIO_PHY1] = true; | |
e0fce78f VS |
2004 | } |
2005 | ||
2006 | I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control); | |
2007 | ||
2008 | DRM_DEBUG_KMS("Initial PHY_CONTROL=0x%08x\n", | |
2009 | dev_priv->chv_phy_control); | |
70722468 VS |
2010 | } |
2011 | ||
9c065a7d DV |
2012 | static void vlv_cmnlane_wa(struct drm_i915_private *dev_priv) |
2013 | { | |
2014 | struct i915_power_well *cmn = | |
2015 | lookup_power_well(dev_priv, PUNIT_POWER_WELL_DPIO_CMN_BC); | |
2016 | struct i915_power_well *disp2d = | |
2017 | lookup_power_well(dev_priv, PUNIT_POWER_WELL_DISP2D); | |
2018 | ||
9c065a7d | 2019 | /* If the display might be already active skip this */ |
5d93a6e5 VS |
2020 | if (cmn->ops->is_enabled(dev_priv, cmn) && |
2021 | disp2d->ops->is_enabled(dev_priv, disp2d) && | |
9c065a7d DV |
2022 | I915_READ(DPIO_CTL) & DPIO_CMNRST) |
2023 | return; | |
2024 | ||
2025 | DRM_DEBUG_KMS("toggling display PHY side reset\n"); | |
2026 | ||
2027 | /* cmnlane needs DPLL registers */ | |
2028 | disp2d->ops->enable(dev_priv, disp2d); | |
2029 | ||
2030 | /* | |
2031 | * From VLV2A0_DP_eDP_HDMI_DPIO_driver_vbios_notes_11.docx: | |
2032 | * Need to assert and de-assert PHY SB reset by gating the | |
2033 | * common lane power, then un-gating it. | |
2034 | * Simply ungating isn't enough to reset the PHY enough to get | |
2035 | * ports and lanes running. | |
2036 | */ | |
2037 | cmn->ops->disable(dev_priv, cmn); | |
2038 | } | |
2039 | ||
e4e7684f DV |
2040 | /** |
2041 | * intel_power_domains_init_hw - initialize hardware power domain state | |
2042 | * @dev_priv: i915 device instance | |
2043 | * | |
2044 | * This function initializes the hardware power domain state and enables all | |
2045 | * power domains using intel_display_set_init_power(). | |
2046 | */ | |
9c065a7d DV |
2047 | void intel_power_domains_init_hw(struct drm_i915_private *dev_priv) |
2048 | { | |
2049 | struct drm_device *dev = dev_priv->dev; | |
2050 | struct i915_power_domains *power_domains = &dev_priv->power_domains; | |
2051 | ||
2052 | power_domains->initializing = true; | |
2053 | ||
70722468 | 2054 | if (IS_CHERRYVIEW(dev)) { |
770effb1 | 2055 | mutex_lock(&power_domains->lock); |
70722468 | 2056 | chv_phy_control_init(dev_priv); |
770effb1 | 2057 | mutex_unlock(&power_domains->lock); |
70722468 | 2058 | } else if (IS_VALLEYVIEW(dev)) { |
9c065a7d DV |
2059 | mutex_lock(&power_domains->lock); |
2060 | vlv_cmnlane_wa(dev_priv); | |
2061 | mutex_unlock(&power_domains->lock); | |
2062 | } | |
2063 | ||
2064 | /* For now, we need the power well to be always enabled. */ | |
2065 | intel_display_set_init_power(dev_priv, true); | |
2066 | intel_power_domains_resume(dev_priv); | |
2067 | power_domains->initializing = false; | |
2068 | } | |
2069 | ||
e4e7684f DV |
2070 | /** |
2071 | * intel_runtime_pm_get - grab a runtime pm reference | |
2072 | * @dev_priv: i915 device instance | |
2073 | * | |
2074 | * This function grabs a device-level runtime pm reference (mostly used for GEM | |
2075 | * code to ensure the GTT or GT is on) and ensures that it is powered up. | |
2076 | * | |
2077 | * Any runtime pm reference obtained by this function must have a symmetric | |
2078 | * call to intel_runtime_pm_put() to release the reference again. | |
2079 | */ | |
9c065a7d DV |
2080 | void intel_runtime_pm_get(struct drm_i915_private *dev_priv) |
2081 | { | |
2082 | struct drm_device *dev = dev_priv->dev; | |
2083 | struct device *device = &dev->pdev->dev; | |
2084 | ||
2085 | if (!HAS_RUNTIME_PM(dev)) | |
2086 | return; | |
2087 | ||
2088 | pm_runtime_get_sync(device); | |
2089 | WARN(dev_priv->pm.suspended, "Device still suspended.\n"); | |
2090 | } | |
2091 | ||
e4e7684f DV |
2092 | /** |
2093 | * intel_runtime_pm_get_noresume - grab a runtime pm reference | |
2094 | * @dev_priv: i915 device instance | |
2095 | * | |
2096 | * This function grabs a device-level runtime pm reference (mostly used for GEM | |
2097 | * code to ensure the GTT or GT is on). | |
2098 | * | |
2099 | * It will _not_ power up the device but instead only check that it's powered | |
2100 | * on. Therefore it is only valid to call this functions from contexts where | |
2101 | * the device is known to be powered up and where trying to power it up would | |
2102 | * result in hilarity and deadlocks. That pretty much means only the system | |
2103 | * suspend/resume code where this is used to grab runtime pm references for | |
2104 | * delayed setup down in work items. | |
2105 | * | |
2106 | * Any runtime pm reference obtained by this function must have a symmetric | |
2107 | * call to intel_runtime_pm_put() to release the reference again. | |
2108 | */ | |
9c065a7d DV |
2109 | void intel_runtime_pm_get_noresume(struct drm_i915_private *dev_priv) |
2110 | { | |
2111 | struct drm_device *dev = dev_priv->dev; | |
2112 | struct device *device = &dev->pdev->dev; | |
2113 | ||
2114 | if (!HAS_RUNTIME_PM(dev)) | |
2115 | return; | |
2116 | ||
2117 | WARN(dev_priv->pm.suspended, "Getting nosync-ref while suspended.\n"); | |
2118 | pm_runtime_get_noresume(device); | |
2119 | } | |
2120 | ||
e4e7684f DV |
2121 | /** |
2122 | * intel_runtime_pm_put - release a runtime pm reference | |
2123 | * @dev_priv: i915 device instance | |
2124 | * | |
2125 | * This function drops the device-level runtime pm reference obtained by | |
2126 | * intel_runtime_pm_get() and might power down the corresponding | |
2127 | * hardware block right away if this is the last reference. | |
2128 | */ | |
9c065a7d DV |
2129 | void intel_runtime_pm_put(struct drm_i915_private *dev_priv) |
2130 | { | |
2131 | struct drm_device *dev = dev_priv->dev; | |
2132 | struct device *device = &dev->pdev->dev; | |
2133 | ||
2134 | if (!HAS_RUNTIME_PM(dev)) | |
2135 | return; | |
2136 | ||
2137 | pm_runtime_mark_last_busy(device); | |
2138 | pm_runtime_put_autosuspend(device); | |
2139 | } | |
2140 | ||
e4e7684f DV |
2141 | /** |
2142 | * intel_runtime_pm_enable - enable runtime pm | |
2143 | * @dev_priv: i915 device instance | |
2144 | * | |
2145 | * This function enables runtime pm at the end of the driver load sequence. | |
2146 | * | |
2147 | * Note that this function does currently not enable runtime pm for the | |
2148 | * subordinate display power domains. That is only done on the first modeset | |
2149 | * using intel_display_set_init_power(). | |
2150 | */ | |
f458ebbc | 2151 | void intel_runtime_pm_enable(struct drm_i915_private *dev_priv) |
9c065a7d DV |
2152 | { |
2153 | struct drm_device *dev = dev_priv->dev; | |
2154 | struct device *device = &dev->pdev->dev; | |
2155 | ||
2156 | if (!HAS_RUNTIME_PM(dev)) | |
2157 | return; | |
2158 | ||
9c065a7d DV |
2159 | /* |
2160 | * RPM depends on RC6 to save restore the GT HW context, so make RC6 a | |
2161 | * requirement. | |
2162 | */ | |
2163 | if (!intel_enable_rc6(dev)) { | |
2164 | DRM_INFO("RC6 disabled, disabling runtime PM support\n"); | |
2165 | return; | |
2166 | } | |
2167 | ||
2168 | pm_runtime_set_autosuspend_delay(device, 10000); /* 10s */ | |
2169 | pm_runtime_mark_last_busy(device); | |
2170 | pm_runtime_use_autosuspend(device); | |
2171 | ||
2172 | pm_runtime_put_autosuspend(device); | |
2173 | } | |
2174 |