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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" | |
34 | #include <drm/i915_powerwell.h> | |
35 | ||
e4e7684f DV |
36 | /** |
37 | * DOC: runtime pm | |
38 | * | |
39 | * The i915 driver supports dynamic enabling and disabling of entire hardware | |
40 | * blocks at runtime. This is especially important on the display side where | |
41 | * software is supposed to control many power gates manually on recent hardware, | |
42 | * since on the GT side a lot of the power management is done by the hardware. | |
43 | * But even there some manual control at the device level is required. | |
44 | * | |
45 | * Since i915 supports a diverse set of platforms with a unified codebase and | |
46 | * hardware engineers just love to shuffle functionality around between power | |
47 | * domains there's a sizeable amount of indirection required. This file provides | |
48 | * generic functions to the driver for grabbing and releasing references for | |
49 | * abstract power domains. It then maps those to the actual power wells | |
50 | * present for a given platform. | |
51 | */ | |
52 | ||
9c065a7d DV |
53 | static struct i915_power_domains *hsw_pwr; |
54 | ||
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 | ||
e4e7684f | 68 | /* |
9c065a7d DV |
69 | * We should only use the power well if we explicitly asked the hardware to |
70 | * enable it, so check if it's enabled and also check if we've requested it to | |
71 | * be enabled. | |
72 | */ | |
73 | static bool hsw_power_well_enabled(struct drm_i915_private *dev_priv, | |
74 | struct i915_power_well *power_well) | |
75 | { | |
76 | return I915_READ(HSW_PWR_WELL_DRIVER) == | |
77 | (HSW_PWR_WELL_ENABLE_REQUEST | HSW_PWR_WELL_STATE_ENABLED); | |
78 | } | |
79 | ||
e4e7684f DV |
80 | /** |
81 | * __intel_display_power_is_enabled - unlocked check for a power domain | |
82 | * @dev_priv: i915 device instance | |
83 | * @domain: power domain to check | |
84 | * | |
85 | * This is the unlocked version of intel_display_power_is_enabled() and should | |
86 | * only be used from error capture and recovery code where deadlocks are | |
87 | * possible. | |
88 | * | |
89 | * Returns: | |
90 | * True when the power domain is enabled, false otherwise. | |
91 | */ | |
f458ebbc DV |
92 | bool __intel_display_power_is_enabled(struct drm_i915_private *dev_priv, |
93 | enum intel_display_power_domain domain) | |
9c065a7d DV |
94 | { |
95 | struct i915_power_domains *power_domains; | |
96 | struct i915_power_well *power_well; | |
97 | bool is_enabled; | |
98 | int i; | |
99 | ||
100 | if (dev_priv->pm.suspended) | |
101 | return false; | |
102 | ||
103 | power_domains = &dev_priv->power_domains; | |
104 | ||
105 | is_enabled = true; | |
106 | ||
107 | for_each_power_well_rev(i, power_well, BIT(domain), power_domains) { | |
108 | if (power_well->always_on) | |
109 | continue; | |
110 | ||
111 | if (!power_well->hw_enabled) { | |
112 | is_enabled = false; | |
113 | break; | |
114 | } | |
115 | } | |
116 | ||
117 | return is_enabled; | |
118 | } | |
119 | ||
e4e7684f DV |
120 | /** |
121 | * intel_display_power_is_enabled - unlocked check for a power domain | |
122 | * @dev_priv: i915 device instance | |
123 | * @domain: power domain to check | |
124 | * | |
125 | * This function can be used to check the hw power domain state. It is mostly | |
126 | * used in hardware state readout functions. Everywhere else code should rely | |
127 | * upon explicit power domain reference counting to ensure that the hardware | |
128 | * block is powered up before accessing it. | |
129 | * | |
130 | * Callers must hold the relevant modesetting locks to ensure that concurrent | |
131 | * threads can't disable the power well while the caller tries to read a few | |
132 | * registers. | |
133 | * | |
134 | * Returns: | |
135 | * True when the power domain is enabled, false otherwise. | |
136 | */ | |
f458ebbc DV |
137 | bool intel_display_power_is_enabled(struct drm_i915_private *dev_priv, |
138 | enum intel_display_power_domain domain) | |
9c065a7d DV |
139 | { |
140 | struct i915_power_domains *power_domains; | |
141 | bool ret; | |
142 | ||
143 | power_domains = &dev_priv->power_domains; | |
144 | ||
145 | mutex_lock(&power_domains->lock); | |
f458ebbc | 146 | ret = __intel_display_power_is_enabled(dev_priv, domain); |
9c065a7d DV |
147 | mutex_unlock(&power_domains->lock); |
148 | ||
149 | return ret; | |
150 | } | |
151 | ||
e4e7684f DV |
152 | /** |
153 | * intel_display_set_init_power - set the initial power domain state | |
154 | * @dev_priv: i915 device instance | |
155 | * @enable: whether to enable or disable the initial power domain state | |
156 | * | |
157 | * For simplicity our driver load/unload and system suspend/resume code assumes | |
158 | * that all power domains are always enabled. This functions controls the state | |
159 | * of this little hack. While the initial power domain state is enabled runtime | |
160 | * pm is effectively disabled. | |
161 | */ | |
d9bc89d9 DV |
162 | void intel_display_set_init_power(struct drm_i915_private *dev_priv, |
163 | bool enable) | |
164 | { | |
165 | if (dev_priv->power_domains.init_power_on == enable) | |
166 | return; | |
167 | ||
168 | if (enable) | |
169 | intel_display_power_get(dev_priv, POWER_DOMAIN_INIT); | |
170 | else | |
171 | intel_display_power_put(dev_priv, POWER_DOMAIN_INIT); | |
172 | ||
173 | dev_priv->power_domains.init_power_on = enable; | |
174 | } | |
175 | ||
9c065a7d DV |
176 | /* |
177 | * Starting with Haswell, we have a "Power Down Well" that can be turned off | |
178 | * when not needed anymore. We have 4 registers that can request the power well | |
179 | * to be enabled, and it will only be disabled if none of the registers is | |
180 | * requesting it to be enabled. | |
181 | */ | |
182 | static void hsw_power_well_post_enable(struct drm_i915_private *dev_priv) | |
183 | { | |
184 | struct drm_device *dev = dev_priv->dev; | |
185 | ||
186 | /* | |
187 | * After we re-enable the power well, if we touch VGA register 0x3d5 | |
188 | * we'll get unclaimed register interrupts. This stops after we write | |
189 | * anything to the VGA MSR register. The vgacon module uses this | |
190 | * register all the time, so if we unbind our driver and, as a | |
191 | * consequence, bind vgacon, we'll get stuck in an infinite loop at | |
192 | * console_unlock(). So make here we touch the VGA MSR register, making | |
193 | * sure vgacon can keep working normally without triggering interrupts | |
194 | * and error messages. | |
195 | */ | |
196 | vga_get_uninterruptible(dev->pdev, VGA_RSRC_LEGACY_IO); | |
197 | outb(inb(VGA_MSR_READ), VGA_MSR_WRITE); | |
198 | vga_put(dev->pdev, VGA_RSRC_LEGACY_IO); | |
199 | ||
200 | if (IS_BROADWELL(dev) || (INTEL_INFO(dev)->gen >= 9)) | |
201 | gen8_irq_power_well_post_enable(dev_priv); | |
202 | } | |
203 | ||
204 | static void hsw_set_power_well(struct drm_i915_private *dev_priv, | |
205 | struct i915_power_well *power_well, bool enable) | |
206 | { | |
207 | bool is_enabled, enable_requested; | |
208 | uint32_t tmp; | |
209 | ||
210 | tmp = I915_READ(HSW_PWR_WELL_DRIVER); | |
211 | is_enabled = tmp & HSW_PWR_WELL_STATE_ENABLED; | |
212 | enable_requested = tmp & HSW_PWR_WELL_ENABLE_REQUEST; | |
213 | ||
214 | if (enable) { | |
215 | if (!enable_requested) | |
216 | I915_WRITE(HSW_PWR_WELL_DRIVER, | |
217 | HSW_PWR_WELL_ENABLE_REQUEST); | |
218 | ||
219 | if (!is_enabled) { | |
220 | DRM_DEBUG_KMS("Enabling power well\n"); | |
221 | if (wait_for((I915_READ(HSW_PWR_WELL_DRIVER) & | |
222 | HSW_PWR_WELL_STATE_ENABLED), 20)) | |
223 | DRM_ERROR("Timeout enabling power well\n"); | |
6d729bff | 224 | hsw_power_well_post_enable(dev_priv); |
9c065a7d DV |
225 | } |
226 | ||
9c065a7d DV |
227 | } else { |
228 | if (enable_requested) { | |
229 | I915_WRITE(HSW_PWR_WELL_DRIVER, 0); | |
230 | POSTING_READ(HSW_PWR_WELL_DRIVER); | |
231 | DRM_DEBUG_KMS("Requesting to disable the power well\n"); | |
232 | } | |
233 | } | |
234 | } | |
235 | ||
236 | static void hsw_power_well_sync_hw(struct drm_i915_private *dev_priv, | |
237 | struct i915_power_well *power_well) | |
238 | { | |
239 | hsw_set_power_well(dev_priv, power_well, power_well->count > 0); | |
240 | ||
241 | /* | |
242 | * We're taking over the BIOS, so clear any requests made by it since | |
243 | * the driver is in charge now. | |
244 | */ | |
245 | if (I915_READ(HSW_PWR_WELL_BIOS) & HSW_PWR_WELL_ENABLE_REQUEST) | |
246 | I915_WRITE(HSW_PWR_WELL_BIOS, 0); | |
247 | } | |
248 | ||
249 | static void hsw_power_well_enable(struct drm_i915_private *dev_priv, | |
250 | struct i915_power_well *power_well) | |
251 | { | |
252 | hsw_set_power_well(dev_priv, power_well, true); | |
253 | } | |
254 | ||
255 | static void hsw_power_well_disable(struct drm_i915_private *dev_priv, | |
256 | struct i915_power_well *power_well) | |
257 | { | |
258 | hsw_set_power_well(dev_priv, power_well, false); | |
259 | } | |
260 | ||
261 | static void i9xx_always_on_power_well_noop(struct drm_i915_private *dev_priv, | |
262 | struct i915_power_well *power_well) | |
263 | { | |
264 | } | |
265 | ||
266 | static bool i9xx_always_on_power_well_enabled(struct drm_i915_private *dev_priv, | |
267 | struct i915_power_well *power_well) | |
268 | { | |
269 | return true; | |
270 | } | |
271 | ||
272 | static void vlv_set_power_well(struct drm_i915_private *dev_priv, | |
273 | struct i915_power_well *power_well, bool enable) | |
274 | { | |
275 | enum punit_power_well power_well_id = power_well->data; | |
276 | u32 mask; | |
277 | u32 state; | |
278 | u32 ctrl; | |
279 | ||
280 | mask = PUNIT_PWRGT_MASK(power_well_id); | |
281 | state = enable ? PUNIT_PWRGT_PWR_ON(power_well_id) : | |
282 | PUNIT_PWRGT_PWR_GATE(power_well_id); | |
283 | ||
284 | mutex_lock(&dev_priv->rps.hw_lock); | |
285 | ||
286 | #define COND \ | |
287 | ((vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_STATUS) & mask) == state) | |
288 | ||
289 | if (COND) | |
290 | goto out; | |
291 | ||
292 | ctrl = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL); | |
293 | ctrl &= ~mask; | |
294 | ctrl |= state; | |
295 | vlv_punit_write(dev_priv, PUNIT_REG_PWRGT_CTRL, ctrl); | |
296 | ||
297 | if (wait_for(COND, 100)) | |
298 | DRM_ERROR("timout setting power well state %08x (%08x)\n", | |
299 | state, | |
300 | vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL)); | |
301 | ||
302 | #undef COND | |
303 | ||
304 | out: | |
305 | mutex_unlock(&dev_priv->rps.hw_lock); | |
306 | } | |
307 | ||
308 | static void vlv_power_well_sync_hw(struct drm_i915_private *dev_priv, | |
309 | struct i915_power_well *power_well) | |
310 | { | |
311 | vlv_set_power_well(dev_priv, power_well, power_well->count > 0); | |
312 | } | |
313 | ||
314 | static void vlv_power_well_enable(struct drm_i915_private *dev_priv, | |
315 | struct i915_power_well *power_well) | |
316 | { | |
317 | vlv_set_power_well(dev_priv, power_well, true); | |
318 | } | |
319 | ||
320 | static void vlv_power_well_disable(struct drm_i915_private *dev_priv, | |
321 | struct i915_power_well *power_well) | |
322 | { | |
323 | vlv_set_power_well(dev_priv, power_well, false); | |
324 | } | |
325 | ||
326 | static bool vlv_power_well_enabled(struct drm_i915_private *dev_priv, | |
327 | struct i915_power_well *power_well) | |
328 | { | |
329 | int power_well_id = power_well->data; | |
330 | bool enabled = false; | |
331 | u32 mask; | |
332 | u32 state; | |
333 | u32 ctrl; | |
334 | ||
335 | mask = PUNIT_PWRGT_MASK(power_well_id); | |
336 | ctrl = PUNIT_PWRGT_PWR_ON(power_well_id); | |
337 | ||
338 | mutex_lock(&dev_priv->rps.hw_lock); | |
339 | ||
340 | state = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_STATUS) & mask; | |
341 | /* | |
342 | * We only ever set the power-on and power-gate states, anything | |
343 | * else is unexpected. | |
344 | */ | |
345 | WARN_ON(state != PUNIT_PWRGT_PWR_ON(power_well_id) && | |
346 | state != PUNIT_PWRGT_PWR_GATE(power_well_id)); | |
347 | if (state == ctrl) | |
348 | enabled = true; | |
349 | ||
350 | /* | |
351 | * A transient state at this point would mean some unexpected party | |
352 | * is poking at the power controls too. | |
353 | */ | |
354 | ctrl = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL) & mask; | |
355 | WARN_ON(ctrl != state); | |
356 | ||
357 | mutex_unlock(&dev_priv->rps.hw_lock); | |
358 | ||
359 | return enabled; | |
360 | } | |
361 | ||
362 | static void vlv_display_power_well_enable(struct drm_i915_private *dev_priv, | |
363 | struct i915_power_well *power_well) | |
364 | { | |
365 | WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DISP2D); | |
366 | ||
367 | vlv_set_power_well(dev_priv, power_well, true); | |
368 | ||
369 | spin_lock_irq(&dev_priv->irq_lock); | |
370 | valleyview_enable_display_irqs(dev_priv); | |
371 | spin_unlock_irq(&dev_priv->irq_lock); | |
372 | ||
373 | /* | |
374 | * During driver initialization/resume we can avoid restoring the | |
375 | * part of the HW/SW state that will be inited anyway explicitly. | |
376 | */ | |
377 | if (dev_priv->power_domains.initializing) | |
378 | return; | |
379 | ||
b963291c | 380 | intel_hpd_init(dev_priv); |
9c065a7d DV |
381 | |
382 | i915_redisable_vga_power_on(dev_priv->dev); | |
383 | } | |
384 | ||
385 | static void vlv_display_power_well_disable(struct drm_i915_private *dev_priv, | |
386 | struct i915_power_well *power_well) | |
387 | { | |
388 | WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DISP2D); | |
389 | ||
390 | spin_lock_irq(&dev_priv->irq_lock); | |
391 | valleyview_disable_display_irqs(dev_priv); | |
392 | spin_unlock_irq(&dev_priv->irq_lock); | |
393 | ||
394 | vlv_set_power_well(dev_priv, power_well, false); | |
395 | ||
396 | vlv_power_sequencer_reset(dev_priv); | |
397 | } | |
398 | ||
399 | static void vlv_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv, | |
400 | struct i915_power_well *power_well) | |
401 | { | |
402 | WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DPIO_CMN_BC); | |
403 | ||
404 | /* | |
405 | * Enable the CRI clock source so we can get at the | |
406 | * display and the reference clock for VGA | |
407 | * hotplug / manual detection. | |
408 | */ | |
409 | I915_WRITE(DPLL(PIPE_B), I915_READ(DPLL(PIPE_B)) | | |
410 | DPLL_REFA_CLK_ENABLE_VLV | DPLL_INTEGRATED_CRI_CLK_VLV); | |
411 | udelay(1); /* >10ns for cmnreset, >0ns for sidereset */ | |
412 | ||
413 | vlv_set_power_well(dev_priv, power_well, true); | |
414 | ||
415 | /* | |
416 | * From VLV2A0_DP_eDP_DPIO_driver_vbios_notes_10.docx - | |
417 | * 6. De-assert cmn_reset/side_reset. Same as VLV X0. | |
418 | * a. GUnit 0x2110 bit[0] set to 1 (def 0) | |
419 | * b. The other bits such as sfr settings / modesel may all | |
420 | * be set to 0. | |
421 | * | |
422 | * This should only be done on init and resume from S3 with | |
423 | * both PLLs disabled, or we risk losing DPIO and PLL | |
424 | * synchronization. | |
425 | */ | |
426 | I915_WRITE(DPIO_CTL, I915_READ(DPIO_CTL) | DPIO_CMNRST); | |
427 | } | |
428 | ||
429 | static void vlv_dpio_cmn_power_well_disable(struct drm_i915_private *dev_priv, | |
430 | struct i915_power_well *power_well) | |
431 | { | |
432 | enum pipe pipe; | |
433 | ||
434 | WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DPIO_CMN_BC); | |
435 | ||
436 | for_each_pipe(dev_priv, pipe) | |
437 | assert_pll_disabled(dev_priv, pipe); | |
438 | ||
439 | /* Assert common reset */ | |
440 | I915_WRITE(DPIO_CTL, I915_READ(DPIO_CTL) & ~DPIO_CMNRST); | |
441 | ||
442 | vlv_set_power_well(dev_priv, power_well, false); | |
443 | } | |
444 | ||
445 | static void chv_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv, | |
446 | struct i915_power_well *power_well) | |
447 | { | |
448 | enum dpio_phy phy; | |
449 | ||
450 | WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DPIO_CMN_BC && | |
451 | power_well->data != PUNIT_POWER_WELL_DPIO_CMN_D); | |
452 | ||
453 | /* | |
454 | * Enable the CRI clock source so we can get at the | |
455 | * display and the reference clock for VGA | |
456 | * hotplug / manual detection. | |
457 | */ | |
458 | if (power_well->data == PUNIT_POWER_WELL_DPIO_CMN_BC) { | |
459 | phy = DPIO_PHY0; | |
460 | I915_WRITE(DPLL(PIPE_B), I915_READ(DPLL(PIPE_B)) | | |
461 | DPLL_REFA_CLK_ENABLE_VLV); | |
462 | I915_WRITE(DPLL(PIPE_B), I915_READ(DPLL(PIPE_B)) | | |
463 | DPLL_REFA_CLK_ENABLE_VLV | DPLL_INTEGRATED_CRI_CLK_VLV); | |
464 | } else { | |
465 | phy = DPIO_PHY1; | |
466 | I915_WRITE(DPLL(PIPE_C), I915_READ(DPLL(PIPE_C)) | | |
467 | DPLL_REFA_CLK_ENABLE_VLV | DPLL_INTEGRATED_CRI_CLK_VLV); | |
468 | } | |
469 | udelay(1); /* >10ns for cmnreset, >0ns for sidereset */ | |
470 | vlv_set_power_well(dev_priv, power_well, true); | |
471 | ||
472 | /* Poll for phypwrgood signal */ | |
473 | if (wait_for(I915_READ(DISPLAY_PHY_STATUS) & PHY_POWERGOOD(phy), 1)) | |
474 | DRM_ERROR("Display PHY %d is not power up\n", phy); | |
475 | ||
476 | I915_WRITE(DISPLAY_PHY_CONTROL, I915_READ(DISPLAY_PHY_CONTROL) | | |
477 | PHY_COM_LANE_RESET_DEASSERT(phy)); | |
478 | } | |
479 | ||
480 | static void chv_dpio_cmn_power_well_disable(struct drm_i915_private *dev_priv, | |
481 | struct i915_power_well *power_well) | |
482 | { | |
483 | enum dpio_phy phy; | |
484 | ||
485 | WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DPIO_CMN_BC && | |
486 | power_well->data != PUNIT_POWER_WELL_DPIO_CMN_D); | |
487 | ||
488 | if (power_well->data == PUNIT_POWER_WELL_DPIO_CMN_BC) { | |
489 | phy = DPIO_PHY0; | |
490 | assert_pll_disabled(dev_priv, PIPE_A); | |
491 | assert_pll_disabled(dev_priv, PIPE_B); | |
492 | } else { | |
493 | phy = DPIO_PHY1; | |
494 | assert_pll_disabled(dev_priv, PIPE_C); | |
495 | } | |
496 | ||
497 | I915_WRITE(DISPLAY_PHY_CONTROL, I915_READ(DISPLAY_PHY_CONTROL) & | |
498 | ~PHY_COM_LANE_RESET_DEASSERT(phy)); | |
499 | ||
500 | vlv_set_power_well(dev_priv, power_well, false); | |
501 | } | |
502 | ||
503 | static bool chv_pipe_power_well_enabled(struct drm_i915_private *dev_priv, | |
504 | struct i915_power_well *power_well) | |
505 | { | |
506 | enum pipe pipe = power_well->data; | |
507 | bool enabled; | |
508 | u32 state, ctrl; | |
509 | ||
510 | mutex_lock(&dev_priv->rps.hw_lock); | |
511 | ||
512 | state = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) & DP_SSS_MASK(pipe); | |
513 | /* | |
514 | * We only ever set the power-on and power-gate states, anything | |
515 | * else is unexpected. | |
516 | */ | |
517 | WARN_ON(state != DP_SSS_PWR_ON(pipe) && state != DP_SSS_PWR_GATE(pipe)); | |
518 | enabled = state == DP_SSS_PWR_ON(pipe); | |
519 | ||
520 | /* | |
521 | * A transient state at this point would mean some unexpected party | |
522 | * is poking at the power controls too. | |
523 | */ | |
524 | ctrl = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) & DP_SSC_MASK(pipe); | |
525 | WARN_ON(ctrl << 16 != state); | |
526 | ||
527 | mutex_unlock(&dev_priv->rps.hw_lock); | |
528 | ||
529 | return enabled; | |
530 | } | |
531 | ||
532 | static void chv_set_pipe_power_well(struct drm_i915_private *dev_priv, | |
533 | struct i915_power_well *power_well, | |
534 | bool enable) | |
535 | { | |
536 | enum pipe pipe = power_well->data; | |
537 | u32 state; | |
538 | u32 ctrl; | |
539 | ||
540 | state = enable ? DP_SSS_PWR_ON(pipe) : DP_SSS_PWR_GATE(pipe); | |
541 | ||
542 | mutex_lock(&dev_priv->rps.hw_lock); | |
543 | ||
544 | #define COND \ | |
545 | ((vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) & DP_SSS_MASK(pipe)) == state) | |
546 | ||
547 | if (COND) | |
548 | goto out; | |
549 | ||
550 | ctrl = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ); | |
551 | ctrl &= ~DP_SSC_MASK(pipe); | |
552 | ctrl |= enable ? DP_SSC_PWR_ON(pipe) : DP_SSC_PWR_GATE(pipe); | |
553 | vlv_punit_write(dev_priv, PUNIT_REG_DSPFREQ, ctrl); | |
554 | ||
555 | if (wait_for(COND, 100)) | |
556 | DRM_ERROR("timout setting power well state %08x (%08x)\n", | |
557 | state, | |
558 | vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ)); | |
559 | ||
560 | #undef COND | |
561 | ||
562 | out: | |
563 | mutex_unlock(&dev_priv->rps.hw_lock); | |
564 | } | |
565 | ||
566 | static void chv_pipe_power_well_sync_hw(struct drm_i915_private *dev_priv, | |
567 | struct i915_power_well *power_well) | |
568 | { | |
569 | chv_set_pipe_power_well(dev_priv, power_well, power_well->count > 0); | |
570 | } | |
571 | ||
572 | static void chv_pipe_power_well_enable(struct drm_i915_private *dev_priv, | |
573 | struct i915_power_well *power_well) | |
574 | { | |
575 | WARN_ON_ONCE(power_well->data != PIPE_A && | |
576 | power_well->data != PIPE_B && | |
577 | power_well->data != PIPE_C); | |
578 | ||
579 | chv_set_pipe_power_well(dev_priv, power_well, true); | |
afd6275d VS |
580 | |
581 | if (power_well->data == PIPE_A) { | |
582 | spin_lock_irq(&dev_priv->irq_lock); | |
583 | valleyview_enable_display_irqs(dev_priv); | |
584 | spin_unlock_irq(&dev_priv->irq_lock); | |
585 | ||
586 | /* | |
587 | * During driver initialization/resume we can avoid restoring the | |
588 | * part of the HW/SW state that will be inited anyway explicitly. | |
589 | */ | |
590 | if (dev_priv->power_domains.initializing) | |
591 | return; | |
592 | ||
593 | intel_hpd_init(dev_priv); | |
594 | ||
595 | i915_redisable_vga_power_on(dev_priv->dev); | |
596 | } | |
9c065a7d DV |
597 | } |
598 | ||
599 | static void chv_pipe_power_well_disable(struct drm_i915_private *dev_priv, | |
600 | struct i915_power_well *power_well) | |
601 | { | |
602 | WARN_ON_ONCE(power_well->data != PIPE_A && | |
603 | power_well->data != PIPE_B && | |
604 | power_well->data != PIPE_C); | |
605 | ||
afd6275d VS |
606 | if (power_well->data == PIPE_A) { |
607 | spin_lock_irq(&dev_priv->irq_lock); | |
608 | valleyview_disable_display_irqs(dev_priv); | |
609 | spin_unlock_irq(&dev_priv->irq_lock); | |
610 | } | |
611 | ||
9c065a7d | 612 | chv_set_pipe_power_well(dev_priv, power_well, false); |
baa4e575 VS |
613 | |
614 | if (power_well->data == PIPE_A) | |
615 | vlv_power_sequencer_reset(dev_priv); | |
9c065a7d DV |
616 | } |
617 | ||
e4e7684f DV |
618 | /** |
619 | * intel_display_power_get - grab a power domain reference | |
620 | * @dev_priv: i915 device instance | |
621 | * @domain: power domain to reference | |
622 | * | |
623 | * This function grabs a power domain reference for @domain and ensures that the | |
624 | * power domain and all its parents are powered up. Therefore users should only | |
625 | * grab a reference to the innermost power domain they need. | |
626 | * | |
627 | * Any power domain reference obtained by this function must have a symmetric | |
628 | * call to intel_display_power_put() to release the reference again. | |
629 | */ | |
9c065a7d DV |
630 | void intel_display_power_get(struct drm_i915_private *dev_priv, |
631 | enum intel_display_power_domain domain) | |
632 | { | |
633 | struct i915_power_domains *power_domains; | |
634 | struct i915_power_well *power_well; | |
635 | int i; | |
636 | ||
637 | intel_runtime_pm_get(dev_priv); | |
638 | ||
639 | power_domains = &dev_priv->power_domains; | |
640 | ||
641 | mutex_lock(&power_domains->lock); | |
642 | ||
643 | for_each_power_well(i, power_well, BIT(domain), power_domains) { | |
644 | if (!power_well->count++) { | |
645 | DRM_DEBUG_KMS("enabling %s\n", power_well->name); | |
646 | power_well->ops->enable(dev_priv, power_well); | |
647 | power_well->hw_enabled = true; | |
648 | } | |
9c065a7d DV |
649 | } |
650 | ||
651 | power_domains->domain_use_count[domain]++; | |
652 | ||
653 | mutex_unlock(&power_domains->lock); | |
654 | } | |
655 | ||
e4e7684f DV |
656 | /** |
657 | * intel_display_power_put - release a power domain reference | |
658 | * @dev_priv: i915 device instance | |
659 | * @domain: power domain to reference | |
660 | * | |
661 | * This function drops the power domain reference obtained by | |
662 | * intel_display_power_get() and might power down the corresponding hardware | |
663 | * block right away if this is the last reference. | |
664 | */ | |
9c065a7d DV |
665 | void intel_display_power_put(struct drm_i915_private *dev_priv, |
666 | enum intel_display_power_domain domain) | |
667 | { | |
668 | struct i915_power_domains *power_domains; | |
669 | struct i915_power_well *power_well; | |
670 | int i; | |
671 | ||
672 | power_domains = &dev_priv->power_domains; | |
673 | ||
674 | mutex_lock(&power_domains->lock); | |
675 | ||
676 | WARN_ON(!power_domains->domain_use_count[domain]); | |
677 | power_domains->domain_use_count[domain]--; | |
678 | ||
679 | for_each_power_well_rev(i, power_well, BIT(domain), power_domains) { | |
680 | WARN_ON(!power_well->count); | |
681 | ||
682 | if (!--power_well->count && i915.disable_power_well) { | |
683 | DRM_DEBUG_KMS("disabling %s\n", power_well->name); | |
684 | power_well->hw_enabled = false; | |
685 | power_well->ops->disable(dev_priv, power_well); | |
686 | } | |
9c065a7d DV |
687 | } |
688 | ||
689 | mutex_unlock(&power_domains->lock); | |
690 | ||
691 | intel_runtime_pm_put(dev_priv); | |
692 | } | |
693 | ||
694 | #define POWER_DOMAIN_MASK (BIT(POWER_DOMAIN_NUM) - 1) | |
695 | ||
696 | #define HSW_ALWAYS_ON_POWER_DOMAINS ( \ | |
697 | BIT(POWER_DOMAIN_PIPE_A) | \ | |
698 | BIT(POWER_DOMAIN_TRANSCODER_EDP) | \ | |
699 | BIT(POWER_DOMAIN_PORT_DDI_A_2_LANES) | \ | |
700 | BIT(POWER_DOMAIN_PORT_DDI_A_4_LANES) | \ | |
701 | BIT(POWER_DOMAIN_PORT_DDI_B_2_LANES) | \ | |
702 | BIT(POWER_DOMAIN_PORT_DDI_B_4_LANES) | \ | |
703 | BIT(POWER_DOMAIN_PORT_DDI_C_2_LANES) | \ | |
704 | BIT(POWER_DOMAIN_PORT_DDI_C_4_LANES) | \ | |
705 | BIT(POWER_DOMAIN_PORT_DDI_D_2_LANES) | \ | |
706 | BIT(POWER_DOMAIN_PORT_DDI_D_4_LANES) | \ | |
707 | BIT(POWER_DOMAIN_PORT_CRT) | \ | |
708 | BIT(POWER_DOMAIN_PLLS) | \ | |
709 | BIT(POWER_DOMAIN_INIT)) | |
710 | #define HSW_DISPLAY_POWER_DOMAINS ( \ | |
711 | (POWER_DOMAIN_MASK & ~HSW_ALWAYS_ON_POWER_DOMAINS) | \ | |
712 | BIT(POWER_DOMAIN_INIT)) | |
713 | ||
714 | #define BDW_ALWAYS_ON_POWER_DOMAINS ( \ | |
715 | HSW_ALWAYS_ON_POWER_DOMAINS | \ | |
716 | BIT(POWER_DOMAIN_PIPE_A_PANEL_FITTER)) | |
717 | #define BDW_DISPLAY_POWER_DOMAINS ( \ | |
718 | (POWER_DOMAIN_MASK & ~BDW_ALWAYS_ON_POWER_DOMAINS) | \ | |
719 | BIT(POWER_DOMAIN_INIT)) | |
720 | ||
721 | #define VLV_ALWAYS_ON_POWER_DOMAINS BIT(POWER_DOMAIN_INIT) | |
722 | #define VLV_DISPLAY_POWER_DOMAINS POWER_DOMAIN_MASK | |
723 | ||
724 | #define VLV_DPIO_CMN_BC_POWER_DOMAINS ( \ | |
725 | BIT(POWER_DOMAIN_PORT_DDI_B_2_LANES) | \ | |
726 | BIT(POWER_DOMAIN_PORT_DDI_B_4_LANES) | \ | |
727 | BIT(POWER_DOMAIN_PORT_DDI_C_2_LANES) | \ | |
728 | BIT(POWER_DOMAIN_PORT_DDI_C_4_LANES) | \ | |
729 | BIT(POWER_DOMAIN_PORT_CRT) | \ | |
730 | BIT(POWER_DOMAIN_INIT)) | |
731 | ||
732 | #define VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS ( \ | |
733 | BIT(POWER_DOMAIN_PORT_DDI_B_2_LANES) | \ | |
734 | BIT(POWER_DOMAIN_PORT_DDI_B_4_LANES) | \ | |
735 | BIT(POWER_DOMAIN_INIT)) | |
736 | ||
737 | #define VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS ( \ | |
738 | BIT(POWER_DOMAIN_PORT_DDI_B_4_LANES) | \ | |
739 | BIT(POWER_DOMAIN_INIT)) | |
740 | ||
741 | #define VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS ( \ | |
742 | BIT(POWER_DOMAIN_PORT_DDI_C_2_LANES) | \ | |
743 | BIT(POWER_DOMAIN_PORT_DDI_C_4_LANES) | \ | |
744 | BIT(POWER_DOMAIN_INIT)) | |
745 | ||
746 | #define VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS ( \ | |
747 | BIT(POWER_DOMAIN_PORT_DDI_C_4_LANES) | \ | |
748 | BIT(POWER_DOMAIN_INIT)) | |
749 | ||
750 | #define CHV_PIPE_A_POWER_DOMAINS ( \ | |
751 | BIT(POWER_DOMAIN_PIPE_A) | \ | |
752 | BIT(POWER_DOMAIN_INIT)) | |
753 | ||
754 | #define CHV_PIPE_B_POWER_DOMAINS ( \ | |
755 | BIT(POWER_DOMAIN_PIPE_B) | \ | |
756 | BIT(POWER_DOMAIN_INIT)) | |
757 | ||
758 | #define CHV_PIPE_C_POWER_DOMAINS ( \ | |
759 | BIT(POWER_DOMAIN_PIPE_C) | \ | |
760 | BIT(POWER_DOMAIN_INIT)) | |
761 | ||
762 | #define CHV_DPIO_CMN_BC_POWER_DOMAINS ( \ | |
763 | BIT(POWER_DOMAIN_PORT_DDI_B_2_LANES) | \ | |
764 | BIT(POWER_DOMAIN_PORT_DDI_B_4_LANES) | \ | |
765 | BIT(POWER_DOMAIN_PORT_DDI_C_2_LANES) | \ | |
766 | BIT(POWER_DOMAIN_PORT_DDI_C_4_LANES) | \ | |
767 | BIT(POWER_DOMAIN_INIT)) | |
768 | ||
769 | #define CHV_DPIO_CMN_D_POWER_DOMAINS ( \ | |
770 | BIT(POWER_DOMAIN_PORT_DDI_D_2_LANES) | \ | |
771 | BIT(POWER_DOMAIN_PORT_DDI_D_4_LANES) | \ | |
772 | BIT(POWER_DOMAIN_INIT)) | |
773 | ||
774 | #define CHV_DPIO_TX_D_LANES_01_POWER_DOMAINS ( \ | |
775 | BIT(POWER_DOMAIN_PORT_DDI_D_2_LANES) | \ | |
776 | BIT(POWER_DOMAIN_PORT_DDI_D_4_LANES) | \ | |
777 | BIT(POWER_DOMAIN_INIT)) | |
778 | ||
779 | #define CHV_DPIO_TX_D_LANES_23_POWER_DOMAINS ( \ | |
780 | BIT(POWER_DOMAIN_PORT_DDI_D_4_LANES) | \ | |
781 | BIT(POWER_DOMAIN_INIT)) | |
782 | ||
783 | static const struct i915_power_well_ops i9xx_always_on_power_well_ops = { | |
784 | .sync_hw = i9xx_always_on_power_well_noop, | |
785 | .enable = i9xx_always_on_power_well_noop, | |
786 | .disable = i9xx_always_on_power_well_noop, | |
787 | .is_enabled = i9xx_always_on_power_well_enabled, | |
788 | }; | |
789 | ||
790 | static const struct i915_power_well_ops chv_pipe_power_well_ops = { | |
791 | .sync_hw = chv_pipe_power_well_sync_hw, | |
792 | .enable = chv_pipe_power_well_enable, | |
793 | .disable = chv_pipe_power_well_disable, | |
794 | .is_enabled = chv_pipe_power_well_enabled, | |
795 | }; | |
796 | ||
797 | static const struct i915_power_well_ops chv_dpio_cmn_power_well_ops = { | |
798 | .sync_hw = vlv_power_well_sync_hw, | |
799 | .enable = chv_dpio_cmn_power_well_enable, | |
800 | .disable = chv_dpio_cmn_power_well_disable, | |
801 | .is_enabled = vlv_power_well_enabled, | |
802 | }; | |
803 | ||
804 | static struct i915_power_well i9xx_always_on_power_well[] = { | |
805 | { | |
806 | .name = "always-on", | |
807 | .always_on = 1, | |
808 | .domains = POWER_DOMAIN_MASK, | |
809 | .ops = &i9xx_always_on_power_well_ops, | |
810 | }, | |
811 | }; | |
812 | ||
813 | static const struct i915_power_well_ops hsw_power_well_ops = { | |
814 | .sync_hw = hsw_power_well_sync_hw, | |
815 | .enable = hsw_power_well_enable, | |
816 | .disable = hsw_power_well_disable, | |
817 | .is_enabled = hsw_power_well_enabled, | |
818 | }; | |
819 | ||
820 | static struct i915_power_well hsw_power_wells[] = { | |
821 | { | |
822 | .name = "always-on", | |
823 | .always_on = 1, | |
824 | .domains = HSW_ALWAYS_ON_POWER_DOMAINS, | |
825 | .ops = &i9xx_always_on_power_well_ops, | |
826 | }, | |
827 | { | |
828 | .name = "display", | |
829 | .domains = HSW_DISPLAY_POWER_DOMAINS, | |
830 | .ops = &hsw_power_well_ops, | |
831 | }, | |
832 | }; | |
833 | ||
834 | static struct i915_power_well bdw_power_wells[] = { | |
835 | { | |
836 | .name = "always-on", | |
837 | .always_on = 1, | |
838 | .domains = BDW_ALWAYS_ON_POWER_DOMAINS, | |
839 | .ops = &i9xx_always_on_power_well_ops, | |
840 | }, | |
841 | { | |
842 | .name = "display", | |
843 | .domains = BDW_DISPLAY_POWER_DOMAINS, | |
844 | .ops = &hsw_power_well_ops, | |
845 | }, | |
846 | }; | |
847 | ||
848 | static const struct i915_power_well_ops vlv_display_power_well_ops = { | |
849 | .sync_hw = vlv_power_well_sync_hw, | |
850 | .enable = vlv_display_power_well_enable, | |
851 | .disable = vlv_display_power_well_disable, | |
852 | .is_enabled = vlv_power_well_enabled, | |
853 | }; | |
854 | ||
855 | static const struct i915_power_well_ops vlv_dpio_cmn_power_well_ops = { | |
856 | .sync_hw = vlv_power_well_sync_hw, | |
857 | .enable = vlv_dpio_cmn_power_well_enable, | |
858 | .disable = vlv_dpio_cmn_power_well_disable, | |
859 | .is_enabled = vlv_power_well_enabled, | |
860 | }; | |
861 | ||
862 | static const struct i915_power_well_ops vlv_dpio_power_well_ops = { | |
863 | .sync_hw = vlv_power_well_sync_hw, | |
864 | .enable = vlv_power_well_enable, | |
865 | .disable = vlv_power_well_disable, | |
866 | .is_enabled = vlv_power_well_enabled, | |
867 | }; | |
868 | ||
869 | static struct i915_power_well vlv_power_wells[] = { | |
870 | { | |
871 | .name = "always-on", | |
872 | .always_on = 1, | |
873 | .domains = VLV_ALWAYS_ON_POWER_DOMAINS, | |
874 | .ops = &i9xx_always_on_power_well_ops, | |
875 | }, | |
876 | { | |
877 | .name = "display", | |
878 | .domains = VLV_DISPLAY_POWER_DOMAINS, | |
879 | .data = PUNIT_POWER_WELL_DISP2D, | |
880 | .ops = &vlv_display_power_well_ops, | |
881 | }, | |
882 | { | |
883 | .name = "dpio-tx-b-01", | |
884 | .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS | | |
885 | VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS | | |
886 | VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS | | |
887 | VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS, | |
888 | .ops = &vlv_dpio_power_well_ops, | |
889 | .data = PUNIT_POWER_WELL_DPIO_TX_B_LANES_01, | |
890 | }, | |
891 | { | |
892 | .name = "dpio-tx-b-23", | |
893 | .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS | | |
894 | VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS | | |
895 | VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS | | |
896 | VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS, | |
897 | .ops = &vlv_dpio_power_well_ops, | |
898 | .data = PUNIT_POWER_WELL_DPIO_TX_B_LANES_23, | |
899 | }, | |
900 | { | |
901 | .name = "dpio-tx-c-01", | |
902 | .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS | | |
903 | VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS | | |
904 | VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS | | |
905 | VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS, | |
906 | .ops = &vlv_dpio_power_well_ops, | |
907 | .data = PUNIT_POWER_WELL_DPIO_TX_C_LANES_01, | |
908 | }, | |
909 | { | |
910 | .name = "dpio-tx-c-23", | |
911 | .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS | | |
912 | VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS | | |
913 | VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS | | |
914 | VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS, | |
915 | .ops = &vlv_dpio_power_well_ops, | |
916 | .data = PUNIT_POWER_WELL_DPIO_TX_C_LANES_23, | |
917 | }, | |
918 | { | |
919 | .name = "dpio-common", | |
920 | .domains = VLV_DPIO_CMN_BC_POWER_DOMAINS, | |
921 | .data = PUNIT_POWER_WELL_DPIO_CMN_BC, | |
922 | .ops = &vlv_dpio_cmn_power_well_ops, | |
923 | }, | |
924 | }; | |
925 | ||
926 | static struct i915_power_well chv_power_wells[] = { | |
927 | { | |
928 | .name = "always-on", | |
929 | .always_on = 1, | |
930 | .domains = VLV_ALWAYS_ON_POWER_DOMAINS, | |
931 | .ops = &i9xx_always_on_power_well_ops, | |
932 | }, | |
933 | #if 0 | |
934 | { | |
935 | .name = "display", | |
936 | .domains = VLV_DISPLAY_POWER_DOMAINS, | |
937 | .data = PUNIT_POWER_WELL_DISP2D, | |
938 | .ops = &vlv_display_power_well_ops, | |
939 | }, | |
baa4e575 | 940 | #endif |
9c065a7d DV |
941 | { |
942 | .name = "pipe-a", | |
baa4e575 VS |
943 | /* |
944 | * FIXME: pipe A power well seems to be the new disp2d well. | |
945 | * At least all registers seem to be housed there. Figure | |
946 | * out if this a a temporary situation in pre-production | |
947 | * hardware or a permanent state of affairs. | |
948 | */ | |
949 | .domains = CHV_PIPE_A_POWER_DOMAINS | VLV_DISPLAY_POWER_DOMAINS, | |
9c065a7d DV |
950 | .data = PIPE_A, |
951 | .ops = &chv_pipe_power_well_ops, | |
952 | }, | |
baa4e575 | 953 | #if 0 |
9c065a7d DV |
954 | { |
955 | .name = "pipe-b", | |
956 | .domains = CHV_PIPE_B_POWER_DOMAINS, | |
957 | .data = PIPE_B, | |
958 | .ops = &chv_pipe_power_well_ops, | |
959 | }, | |
960 | { | |
961 | .name = "pipe-c", | |
962 | .domains = CHV_PIPE_C_POWER_DOMAINS, | |
963 | .data = PIPE_C, | |
964 | .ops = &chv_pipe_power_well_ops, | |
965 | }, | |
966 | #endif | |
967 | { | |
968 | .name = "dpio-common-bc", | |
969 | /* | |
970 | * XXX: cmnreset for one PHY seems to disturb the other. | |
971 | * As a workaround keep both powered on at the same | |
972 | * time for now. | |
973 | */ | |
974 | .domains = CHV_DPIO_CMN_BC_POWER_DOMAINS | CHV_DPIO_CMN_D_POWER_DOMAINS, | |
975 | .data = PUNIT_POWER_WELL_DPIO_CMN_BC, | |
976 | .ops = &chv_dpio_cmn_power_well_ops, | |
977 | }, | |
978 | { | |
979 | .name = "dpio-common-d", | |
980 | /* | |
981 | * XXX: cmnreset for one PHY seems to disturb the other. | |
982 | * As a workaround keep both powered on at the same | |
983 | * time for now. | |
984 | */ | |
985 | .domains = CHV_DPIO_CMN_BC_POWER_DOMAINS | CHV_DPIO_CMN_D_POWER_DOMAINS, | |
986 | .data = PUNIT_POWER_WELL_DPIO_CMN_D, | |
987 | .ops = &chv_dpio_cmn_power_well_ops, | |
988 | }, | |
989 | #if 0 | |
990 | { | |
991 | .name = "dpio-tx-b-01", | |
992 | .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS | | |
993 | VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS, | |
994 | .ops = &vlv_dpio_power_well_ops, | |
995 | .data = PUNIT_POWER_WELL_DPIO_TX_B_LANES_01, | |
996 | }, | |
997 | { | |
998 | .name = "dpio-tx-b-23", | |
999 | .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS | | |
1000 | VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS, | |
1001 | .ops = &vlv_dpio_power_well_ops, | |
1002 | .data = PUNIT_POWER_WELL_DPIO_TX_B_LANES_23, | |
1003 | }, | |
1004 | { | |
1005 | .name = "dpio-tx-c-01", | |
1006 | .domains = VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS | | |
1007 | VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS, | |
1008 | .ops = &vlv_dpio_power_well_ops, | |
1009 | .data = PUNIT_POWER_WELL_DPIO_TX_C_LANES_01, | |
1010 | }, | |
1011 | { | |
1012 | .name = "dpio-tx-c-23", | |
1013 | .domains = VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS | | |
1014 | VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS, | |
1015 | .ops = &vlv_dpio_power_well_ops, | |
1016 | .data = PUNIT_POWER_WELL_DPIO_TX_C_LANES_23, | |
1017 | }, | |
1018 | { | |
1019 | .name = "dpio-tx-d-01", | |
1020 | .domains = CHV_DPIO_TX_D_LANES_01_POWER_DOMAINS | | |
1021 | CHV_DPIO_TX_D_LANES_23_POWER_DOMAINS, | |
1022 | .ops = &vlv_dpio_power_well_ops, | |
1023 | .data = PUNIT_POWER_WELL_DPIO_TX_D_LANES_01, | |
1024 | }, | |
1025 | { | |
1026 | .name = "dpio-tx-d-23", | |
1027 | .domains = CHV_DPIO_TX_D_LANES_01_POWER_DOMAINS | | |
1028 | CHV_DPIO_TX_D_LANES_23_POWER_DOMAINS, | |
1029 | .ops = &vlv_dpio_power_well_ops, | |
1030 | .data = PUNIT_POWER_WELL_DPIO_TX_D_LANES_23, | |
1031 | }, | |
1032 | #endif | |
1033 | }; | |
1034 | ||
1035 | static struct i915_power_well *lookup_power_well(struct drm_i915_private *dev_priv, | |
1036 | enum punit_power_well power_well_id) | |
1037 | { | |
1038 | struct i915_power_domains *power_domains = &dev_priv->power_domains; | |
1039 | struct i915_power_well *power_well; | |
1040 | int i; | |
1041 | ||
1042 | for_each_power_well(i, power_well, POWER_DOMAIN_MASK, power_domains) { | |
1043 | if (power_well->data == power_well_id) | |
1044 | return power_well; | |
1045 | } | |
1046 | ||
1047 | return NULL; | |
1048 | } | |
1049 | ||
1050 | #define set_power_wells(power_domains, __power_wells) ({ \ | |
1051 | (power_domains)->power_wells = (__power_wells); \ | |
1052 | (power_domains)->power_well_count = ARRAY_SIZE(__power_wells); \ | |
1053 | }) | |
1054 | ||
e4e7684f DV |
1055 | /** |
1056 | * intel_power_domains_init - initializes the power domain structures | |
1057 | * @dev_priv: i915 device instance | |
1058 | * | |
1059 | * Initializes the power domain structures for @dev_priv depending upon the | |
1060 | * supported platform. | |
1061 | */ | |
9c065a7d DV |
1062 | int intel_power_domains_init(struct drm_i915_private *dev_priv) |
1063 | { | |
1064 | struct i915_power_domains *power_domains = &dev_priv->power_domains; | |
1065 | ||
1066 | mutex_init(&power_domains->lock); | |
1067 | ||
1068 | /* | |
1069 | * The enabling order will be from lower to higher indexed wells, | |
1070 | * the disabling order is reversed. | |
1071 | */ | |
1072 | if (IS_HASWELL(dev_priv->dev)) { | |
1073 | set_power_wells(power_domains, hsw_power_wells); | |
1074 | hsw_pwr = power_domains; | |
1075 | } else if (IS_BROADWELL(dev_priv->dev)) { | |
1076 | set_power_wells(power_domains, bdw_power_wells); | |
1077 | hsw_pwr = power_domains; | |
1078 | } else if (IS_CHERRYVIEW(dev_priv->dev)) { | |
1079 | set_power_wells(power_domains, chv_power_wells); | |
1080 | } else if (IS_VALLEYVIEW(dev_priv->dev)) { | |
1081 | set_power_wells(power_domains, vlv_power_wells); | |
1082 | } else { | |
1083 | set_power_wells(power_domains, i9xx_always_on_power_well); | |
1084 | } | |
1085 | ||
1086 | return 0; | |
1087 | } | |
1088 | ||
41373cd5 DV |
1089 | static void intel_runtime_pm_disable(struct drm_i915_private *dev_priv) |
1090 | { | |
1091 | struct drm_device *dev = dev_priv->dev; | |
1092 | struct device *device = &dev->pdev->dev; | |
1093 | ||
1094 | if (!HAS_RUNTIME_PM(dev)) | |
1095 | return; | |
1096 | ||
1097 | if (!intel_enable_rc6(dev)) | |
1098 | return; | |
1099 | ||
1100 | /* Make sure we're not suspended first. */ | |
1101 | pm_runtime_get_sync(device); | |
1102 | pm_runtime_disable(device); | |
1103 | } | |
1104 | ||
e4e7684f DV |
1105 | /** |
1106 | * intel_power_domains_fini - finalizes the power domain structures | |
1107 | * @dev_priv: i915 device instance | |
1108 | * | |
1109 | * Finalizes the power domain structures for @dev_priv depending upon the | |
1110 | * supported platform. This function also disables runtime pm and ensures that | |
1111 | * the device stays powered up so that the driver can be reloaded. | |
1112 | */ | |
f458ebbc | 1113 | void intel_power_domains_fini(struct drm_i915_private *dev_priv) |
9c065a7d | 1114 | { |
41373cd5 DV |
1115 | intel_runtime_pm_disable(dev_priv); |
1116 | ||
f458ebbc DV |
1117 | /* The i915.ko module is still not prepared to be loaded when |
1118 | * the power well is not enabled, so just enable it in case | |
1119 | * we're going to unload/reload. */ | |
1120 | intel_display_set_init_power(dev_priv, true); | |
1121 | ||
9c065a7d DV |
1122 | hsw_pwr = NULL; |
1123 | } | |
1124 | ||
1125 | static void intel_power_domains_resume(struct drm_i915_private *dev_priv) | |
1126 | { | |
1127 | struct i915_power_domains *power_domains = &dev_priv->power_domains; | |
1128 | struct i915_power_well *power_well; | |
1129 | int i; | |
1130 | ||
1131 | mutex_lock(&power_domains->lock); | |
1132 | for_each_power_well(i, power_well, POWER_DOMAIN_MASK, power_domains) { | |
1133 | power_well->ops->sync_hw(dev_priv, power_well); | |
1134 | power_well->hw_enabled = power_well->ops->is_enabled(dev_priv, | |
1135 | power_well); | |
1136 | } | |
1137 | mutex_unlock(&power_domains->lock); | |
1138 | } | |
1139 | ||
1140 | static void vlv_cmnlane_wa(struct drm_i915_private *dev_priv) | |
1141 | { | |
1142 | struct i915_power_well *cmn = | |
1143 | lookup_power_well(dev_priv, PUNIT_POWER_WELL_DPIO_CMN_BC); | |
1144 | struct i915_power_well *disp2d = | |
1145 | lookup_power_well(dev_priv, PUNIT_POWER_WELL_DISP2D); | |
1146 | ||
9c065a7d | 1147 | /* If the display might be already active skip this */ |
5d93a6e5 VS |
1148 | if (cmn->ops->is_enabled(dev_priv, cmn) && |
1149 | disp2d->ops->is_enabled(dev_priv, disp2d) && | |
9c065a7d DV |
1150 | I915_READ(DPIO_CTL) & DPIO_CMNRST) |
1151 | return; | |
1152 | ||
1153 | DRM_DEBUG_KMS("toggling display PHY side reset\n"); | |
1154 | ||
1155 | /* cmnlane needs DPLL registers */ | |
1156 | disp2d->ops->enable(dev_priv, disp2d); | |
1157 | ||
1158 | /* | |
1159 | * From VLV2A0_DP_eDP_HDMI_DPIO_driver_vbios_notes_11.docx: | |
1160 | * Need to assert and de-assert PHY SB reset by gating the | |
1161 | * common lane power, then un-gating it. | |
1162 | * Simply ungating isn't enough to reset the PHY enough to get | |
1163 | * ports and lanes running. | |
1164 | */ | |
1165 | cmn->ops->disable(dev_priv, cmn); | |
1166 | } | |
1167 | ||
e4e7684f DV |
1168 | /** |
1169 | * intel_power_domains_init_hw - initialize hardware power domain state | |
1170 | * @dev_priv: i915 device instance | |
1171 | * | |
1172 | * This function initializes the hardware power domain state and enables all | |
1173 | * power domains using intel_display_set_init_power(). | |
1174 | */ | |
9c065a7d DV |
1175 | void intel_power_domains_init_hw(struct drm_i915_private *dev_priv) |
1176 | { | |
1177 | struct drm_device *dev = dev_priv->dev; | |
1178 | struct i915_power_domains *power_domains = &dev_priv->power_domains; | |
1179 | ||
1180 | power_domains->initializing = true; | |
1181 | ||
1182 | if (IS_VALLEYVIEW(dev) && !IS_CHERRYVIEW(dev)) { | |
1183 | mutex_lock(&power_domains->lock); | |
1184 | vlv_cmnlane_wa(dev_priv); | |
1185 | mutex_unlock(&power_domains->lock); | |
1186 | } | |
1187 | ||
1188 | /* For now, we need the power well to be always enabled. */ | |
1189 | intel_display_set_init_power(dev_priv, true); | |
1190 | intel_power_domains_resume(dev_priv); | |
1191 | power_domains->initializing = false; | |
1192 | } | |
1193 | ||
e4e7684f DV |
1194 | /** |
1195 | * intel_aux_display_runtime_get - grab an auxilliary power domain reference | |
1196 | * @dev_priv: i915 device instance | |
1197 | * | |
1198 | * This function grabs a power domain reference for the auxiliary power domain | |
1199 | * (for access to the GMBUS and DP AUX blocks) and ensures that it and all its | |
1200 | * parents are powered up. Therefore users should only grab a reference to the | |
1201 | * innermost power domain they need. | |
1202 | * | |
1203 | * Any power domain reference obtained by this function must have a symmetric | |
1204 | * call to intel_aux_display_runtime_put() to release the reference again. | |
1205 | */ | |
9c065a7d DV |
1206 | void intel_aux_display_runtime_get(struct drm_i915_private *dev_priv) |
1207 | { | |
1208 | intel_runtime_pm_get(dev_priv); | |
1209 | } | |
1210 | ||
e4e7684f DV |
1211 | /** |
1212 | * intel_aux_display_runtime_put - release an auxilliary power domain reference | |
1213 | * @dev_priv: i915 device instance | |
1214 | * | |
1215 | * This function drops the auxilliary power domain reference obtained by | |
1216 | * intel_aux_display_runtime_get() and might power down the corresponding | |
1217 | * hardware block right away if this is the last reference. | |
1218 | */ | |
9c065a7d DV |
1219 | void intel_aux_display_runtime_put(struct drm_i915_private *dev_priv) |
1220 | { | |
1221 | intel_runtime_pm_put(dev_priv); | |
1222 | } | |
1223 | ||
e4e7684f DV |
1224 | /** |
1225 | * intel_runtime_pm_get - grab a runtime pm reference | |
1226 | * @dev_priv: i915 device instance | |
1227 | * | |
1228 | * This function grabs a device-level runtime pm reference (mostly used for GEM | |
1229 | * code to ensure the GTT or GT is on) and ensures that it is powered up. | |
1230 | * | |
1231 | * Any runtime pm reference obtained by this function must have a symmetric | |
1232 | * call to intel_runtime_pm_put() to release the reference again. | |
1233 | */ | |
9c065a7d DV |
1234 | void intel_runtime_pm_get(struct drm_i915_private *dev_priv) |
1235 | { | |
1236 | struct drm_device *dev = dev_priv->dev; | |
1237 | struct device *device = &dev->pdev->dev; | |
1238 | ||
1239 | if (!HAS_RUNTIME_PM(dev)) | |
1240 | return; | |
1241 | ||
1242 | pm_runtime_get_sync(device); | |
1243 | WARN(dev_priv->pm.suspended, "Device still suspended.\n"); | |
1244 | } | |
1245 | ||
e4e7684f DV |
1246 | /** |
1247 | * intel_runtime_pm_get_noresume - grab a runtime pm reference | |
1248 | * @dev_priv: i915 device instance | |
1249 | * | |
1250 | * This function grabs a device-level runtime pm reference (mostly used for GEM | |
1251 | * code to ensure the GTT or GT is on). | |
1252 | * | |
1253 | * It will _not_ power up the device but instead only check that it's powered | |
1254 | * on. Therefore it is only valid to call this functions from contexts where | |
1255 | * the device is known to be powered up and where trying to power it up would | |
1256 | * result in hilarity and deadlocks. That pretty much means only the system | |
1257 | * suspend/resume code where this is used to grab runtime pm references for | |
1258 | * delayed setup down in work items. | |
1259 | * | |
1260 | * Any runtime pm reference obtained by this function must have a symmetric | |
1261 | * call to intel_runtime_pm_put() to release the reference again. | |
1262 | */ | |
9c065a7d DV |
1263 | void intel_runtime_pm_get_noresume(struct drm_i915_private *dev_priv) |
1264 | { | |
1265 | struct drm_device *dev = dev_priv->dev; | |
1266 | struct device *device = &dev->pdev->dev; | |
1267 | ||
1268 | if (!HAS_RUNTIME_PM(dev)) | |
1269 | return; | |
1270 | ||
1271 | WARN(dev_priv->pm.suspended, "Getting nosync-ref while suspended.\n"); | |
1272 | pm_runtime_get_noresume(device); | |
1273 | } | |
1274 | ||
e4e7684f DV |
1275 | /** |
1276 | * intel_runtime_pm_put - release a runtime pm reference | |
1277 | * @dev_priv: i915 device instance | |
1278 | * | |
1279 | * This function drops the device-level runtime pm reference obtained by | |
1280 | * intel_runtime_pm_get() and might power down the corresponding | |
1281 | * hardware block right away if this is the last reference. | |
1282 | */ | |
9c065a7d DV |
1283 | void intel_runtime_pm_put(struct drm_i915_private *dev_priv) |
1284 | { | |
1285 | struct drm_device *dev = dev_priv->dev; | |
1286 | struct device *device = &dev->pdev->dev; | |
1287 | ||
1288 | if (!HAS_RUNTIME_PM(dev)) | |
1289 | return; | |
1290 | ||
1291 | pm_runtime_mark_last_busy(device); | |
1292 | pm_runtime_put_autosuspend(device); | |
1293 | } | |
1294 | ||
e4e7684f DV |
1295 | /** |
1296 | * intel_runtime_pm_enable - enable runtime pm | |
1297 | * @dev_priv: i915 device instance | |
1298 | * | |
1299 | * This function enables runtime pm at the end of the driver load sequence. | |
1300 | * | |
1301 | * Note that this function does currently not enable runtime pm for the | |
1302 | * subordinate display power domains. That is only done on the first modeset | |
1303 | * using intel_display_set_init_power(). | |
1304 | */ | |
f458ebbc | 1305 | void intel_runtime_pm_enable(struct drm_i915_private *dev_priv) |
9c065a7d DV |
1306 | { |
1307 | struct drm_device *dev = dev_priv->dev; | |
1308 | struct device *device = &dev->pdev->dev; | |
1309 | ||
1310 | if (!HAS_RUNTIME_PM(dev)) | |
1311 | return; | |
1312 | ||
1313 | pm_runtime_set_active(device); | |
1314 | ||
1315 | /* | |
1316 | * RPM depends on RC6 to save restore the GT HW context, so make RC6 a | |
1317 | * requirement. | |
1318 | */ | |
1319 | if (!intel_enable_rc6(dev)) { | |
1320 | DRM_INFO("RC6 disabled, disabling runtime PM support\n"); | |
1321 | return; | |
1322 | } | |
1323 | ||
1324 | pm_runtime_set_autosuspend_delay(device, 10000); /* 10s */ | |
1325 | pm_runtime_mark_last_busy(device); | |
1326 | pm_runtime_use_autosuspend(device); | |
1327 | ||
1328 | pm_runtime_put_autosuspend(device); | |
1329 | } | |
1330 | ||
9c065a7d DV |
1331 | /* Display audio driver power well request */ |
1332 | int i915_request_power_well(void) | |
1333 | { | |
1334 | struct drm_i915_private *dev_priv; | |
1335 | ||
1336 | if (!hsw_pwr) | |
1337 | return -ENODEV; | |
1338 | ||
1339 | dev_priv = container_of(hsw_pwr, struct drm_i915_private, | |
1340 | power_domains); | |
1341 | intel_display_power_get(dev_priv, POWER_DOMAIN_AUDIO); | |
1342 | return 0; | |
1343 | } | |
1344 | EXPORT_SYMBOL_GPL(i915_request_power_well); | |
1345 | ||
1346 | /* Display audio driver power well release */ | |
1347 | int i915_release_power_well(void) | |
1348 | { | |
1349 | struct drm_i915_private *dev_priv; | |
1350 | ||
1351 | if (!hsw_pwr) | |
1352 | return -ENODEV; | |
1353 | ||
1354 | dev_priv = container_of(hsw_pwr, struct drm_i915_private, | |
1355 | power_domains); | |
1356 | intel_display_power_put(dev_priv, POWER_DOMAIN_AUDIO); | |
1357 | return 0; | |
1358 | } | |
1359 | EXPORT_SYMBOL_GPL(i915_release_power_well); | |
1360 | ||
1361 | /* | |
1362 | * Private interface for the audio driver to get CDCLK in kHz. | |
1363 | * | |
1364 | * Caller must request power well using i915_request_power_well() prior to | |
1365 | * making the call. | |
1366 | */ | |
1367 | int i915_get_cdclk_freq(void) | |
1368 | { | |
1369 | struct drm_i915_private *dev_priv; | |
1370 | ||
1371 | if (!hsw_pwr) | |
1372 | return -ENODEV; | |
1373 | ||
1374 | dev_priv = container_of(hsw_pwr, struct drm_i915_private, | |
1375 | power_domains); | |
1376 | ||
1377 | return intel_ddi_get_cdclk_freq(dev_priv); | |
1378 | } | |
1379 | EXPORT_SYMBOL_GPL(i915_get_cdclk_freq); |