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1 | /* |
2 | * Copyright 2008 Intel Corporation <hong.liu@intel.com> | |
3 | * Copyright 2008 Red Hat <mjg@redhat.com> | |
4 | * | |
5 | * Permission is hereby granted, free of charge, to any person obtaining | |
6 | * a copy of this software and associated documentation files (the | |
7 | * "Software"), to deal in the Software without restriction, including | |
8 | * without limitation the rights to use, copy, modify, merge, publish, | |
9 | * distribute, sub license, and/or sell copies of the Software, and to | |
10 | * permit persons to whom the Software is furnished to do so, subject to | |
11 | * the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice (including the | |
14 | * next paragraph) shall be included in all copies or substantial | |
15 | * portions of the Software. | |
16 | * | |
17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
18 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
19 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
20 | * NON-INFRINGEMENT. IN NO EVENT SHALL INTEL AND/OR ITS SUPPLIERS BE | |
21 | * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
22 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
23 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
24 | * SOFTWARE. | |
25 | * | |
26 | */ | |
27 | ||
28 | #include <linux/acpi.h> | |
29 | ||
30 | #include "drmP.h" | |
31 | #include "i915_drm.h" | |
32 | #include "i915_drv.h" | |
33 | ||
34 | #define PCI_ASLE 0xe4 | |
35 | #define PCI_LBPC 0xf4 | |
36 | #define PCI_ASLS 0xfc | |
37 | ||
38 | #define OPREGION_SZ (8*1024) | |
39 | #define OPREGION_HEADER_OFFSET 0 | |
40 | #define OPREGION_ACPI_OFFSET 0x100 | |
41 | #define OPREGION_SWSCI_OFFSET 0x200 | |
42 | #define OPREGION_ASLE_OFFSET 0x300 | |
43 | #define OPREGION_VBT_OFFSET 0x1000 | |
44 | ||
45 | #define OPREGION_SIGNATURE "IntelGraphicsMem" | |
46 | #define MBOX_ACPI (1<<0) | |
47 | #define MBOX_SWSCI (1<<1) | |
48 | #define MBOX_ASLE (1<<2) | |
49 | ||
50 | struct opregion_header { | |
51 | u8 signature[16]; | |
52 | u32 size; | |
53 | u32 opregion_ver; | |
54 | u8 bios_ver[32]; | |
55 | u8 vbios_ver[16]; | |
56 | u8 driver_ver[16]; | |
57 | u32 mboxes; | |
58 | u8 reserved[164]; | |
59 | } __attribute__((packed)); | |
60 | ||
61 | /* OpRegion mailbox #1: public ACPI methods */ | |
62 | struct opregion_acpi { | |
63 | u32 drdy; /* driver readiness */ | |
64 | u32 csts; /* notification status */ | |
65 | u32 cevt; /* current event */ | |
66 | u8 rsvd1[20]; | |
67 | u32 didl[8]; /* supported display devices ID list */ | |
68 | u32 cpdl[8]; /* currently presented display list */ | |
69 | u32 cadl[8]; /* currently active display list */ | |
70 | u32 nadl[8]; /* next active devices list */ | |
71 | u32 aslp; /* ASL sleep time-out */ | |
72 | u32 tidx; /* toggle table index */ | |
73 | u32 chpd; /* current hotplug enable indicator */ | |
74 | u32 clid; /* current lid state*/ | |
75 | u32 cdck; /* current docking state */ | |
76 | u32 sxsw; /* Sx state resume */ | |
77 | u32 evts; /* ASL supported events */ | |
78 | u32 cnot; /* current OS notification */ | |
79 | u32 nrdy; /* driver status */ | |
80 | u8 rsvd2[60]; | |
81 | } __attribute__((packed)); | |
82 | ||
83 | /* OpRegion mailbox #2: SWSCI */ | |
84 | struct opregion_swsci { | |
85 | u32 scic; /* SWSCI command|status|data */ | |
86 | u32 parm; /* command parameters */ | |
87 | u32 dslp; /* driver sleep time-out */ | |
88 | u8 rsvd[244]; | |
89 | } __attribute__((packed)); | |
90 | ||
91 | /* OpRegion mailbox #3: ASLE */ | |
92 | struct opregion_asle { | |
93 | u32 ardy; /* driver readiness */ | |
94 | u32 aslc; /* ASLE interrupt command */ | |
95 | u32 tche; /* technology enabled indicator */ | |
96 | u32 alsi; /* current ALS illuminance reading */ | |
97 | u32 bclp; /* backlight brightness to set */ | |
98 | u32 pfit; /* panel fitting state */ | |
99 | u32 cblv; /* current brightness level */ | |
100 | u16 bclm[20]; /* backlight level duty cycle mapping table */ | |
101 | u32 cpfm; /* current panel fitting mode */ | |
102 | u32 epfm; /* enabled panel fitting modes */ | |
103 | u8 plut[74]; /* panel LUT and identifier */ | |
104 | u32 pfmb; /* PWM freq and min brightness */ | |
105 | u8 rsvd[102]; | |
106 | } __attribute__((packed)); | |
107 | ||
108 | /* ASLE irq request bits */ | |
109 | #define ASLE_SET_ALS_ILLUM (1 << 0) | |
110 | #define ASLE_SET_BACKLIGHT (1 << 1) | |
111 | #define ASLE_SET_PFIT (1 << 2) | |
112 | #define ASLE_SET_PWM_FREQ (1 << 3) | |
113 | #define ASLE_REQ_MSK 0xf | |
114 | ||
115 | /* response bits of ASLE irq request */ | |
116 | #define ASLE_ALS_ILLUM_FAIL (2<<10) | |
117 | #define ASLE_BACKLIGHT_FAIL (2<<12) | |
118 | #define ASLE_PFIT_FAIL (2<<14) | |
119 | #define ASLE_PWM_FREQ_FAIL (2<<16) | |
120 | ||
121 | /* ASLE backlight brightness to set */ | |
122 | #define ASLE_BCLP_VALID (1<<31) | |
123 | #define ASLE_BCLP_MSK (~(1<<31)) | |
124 | ||
125 | /* ASLE panel fitting request */ | |
126 | #define ASLE_PFIT_VALID (1<<31) | |
127 | #define ASLE_PFIT_CENTER (1<<0) | |
128 | #define ASLE_PFIT_STRETCH_TEXT (1<<1) | |
129 | #define ASLE_PFIT_STRETCH_GFX (1<<2) | |
130 | ||
131 | /* PWM frequency and minimum brightness */ | |
132 | #define ASLE_PFMB_BRIGHTNESS_MASK (0xff) | |
133 | #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8) | |
134 | #define ASLE_PFMB_PWM_MASK (0x7ffffe00) | |
135 | #define ASLE_PFMB_PWM_VALID (1<<31) | |
136 | ||
137 | #define ASLE_CBLV_VALID (1<<31) | |
138 | ||
139 | static u32 asle_set_backlight(struct drm_device *dev, u32 bclp) | |
140 | { | |
141 | struct drm_i915_private *dev_priv = dev->dev_private; | |
142 | struct opregion_asle *asle = dev_priv->opregion.asle; | |
143 | u32 blc_pwm_ctl, blc_pwm_ctl2; | |
144 | ||
145 | if (!(bclp & ASLE_BCLP_VALID)) | |
146 | return ASLE_BACKLIGHT_FAIL; | |
147 | ||
148 | bclp &= ASLE_BCLP_MSK; | |
149 | if (bclp < 0 || bclp > 255) | |
150 | return ASLE_BACKLIGHT_FAIL; | |
151 | ||
152 | blc_pwm_ctl = I915_READ(BLC_PWM_CTL); | |
153 | blc_pwm_ctl &= ~BACKLIGHT_DUTY_CYCLE_MASK; | |
154 | blc_pwm_ctl2 = I915_READ(BLC_PWM_CTL2); | |
155 | ||
156 | if (blc_pwm_ctl2 & BLM_COMBINATION_MODE) | |
157 | pci_write_config_dword(dev->pdev, PCI_LBPC, bclp); | |
158 | else | |
159 | I915_WRITE(BLC_PWM_CTL, blc_pwm_ctl | ((bclp * 0x101)-1)); | |
160 | ||
161 | asle->cblv = (bclp*0x64)/0xff | ASLE_CBLV_VALID; | |
162 | ||
163 | return 0; | |
164 | } | |
165 | ||
166 | static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi) | |
167 | { | |
168 | /* alsi is the current ALS reading in lux. 0 indicates below sensor | |
169 | range, 0xffff indicates above sensor range. 1-0xfffe are valid */ | |
170 | return 0; | |
171 | } | |
172 | ||
173 | static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb) | |
174 | { | |
175 | struct drm_i915_private *dev_priv = dev->dev_private; | |
176 | if (pfmb & ASLE_PFMB_PWM_VALID) { | |
177 | u32 blc_pwm_ctl = I915_READ(BLC_PWM_CTL); | |
178 | u32 pwm = pfmb & ASLE_PFMB_PWM_MASK; | |
179 | blc_pwm_ctl &= BACKLIGHT_DUTY_CYCLE_MASK; | |
180 | pwm = pwm >> 9; | |
181 | /* FIXME - what do we do with the PWM? */ | |
182 | } | |
183 | return 0; | |
184 | } | |
185 | ||
186 | static u32 asle_set_pfit(struct drm_device *dev, u32 pfit) | |
187 | { | |
188 | /* Panel fitting is currently controlled by the X code, so this is a | |
189 | noop until modesetting support works fully */ | |
190 | if (!(pfit & ASLE_PFIT_VALID)) | |
191 | return ASLE_PFIT_FAIL; | |
192 | return 0; | |
193 | } | |
194 | ||
195 | void opregion_asle_intr(struct drm_device *dev) | |
196 | { | |
197 | struct drm_i915_private *dev_priv = dev->dev_private; | |
198 | struct opregion_asle *asle = dev_priv->opregion.asle; | |
199 | u32 asle_stat = 0; | |
200 | u32 asle_req; | |
201 | ||
202 | if (!asle) | |
203 | return; | |
204 | ||
205 | asle_req = asle->aslc & ASLE_REQ_MSK; | |
206 | ||
207 | if (!asle_req) { | |
208 | DRM_DEBUG("non asle set request??\n"); | |
209 | return; | |
210 | } | |
211 | ||
212 | if (asle_req & ASLE_SET_ALS_ILLUM) | |
213 | asle_stat |= asle_set_als_illum(dev, asle->alsi); | |
214 | ||
215 | if (asle_req & ASLE_SET_BACKLIGHT) | |
216 | asle_stat |= asle_set_backlight(dev, asle->bclp); | |
217 | ||
218 | if (asle_req & ASLE_SET_PFIT) | |
219 | asle_stat |= asle_set_pfit(dev, asle->pfit); | |
220 | ||
221 | if (asle_req & ASLE_SET_PWM_FREQ) | |
222 | asle_stat |= asle_set_pwm_freq(dev, asle->pfmb); | |
223 | ||
224 | asle->aslc = asle_stat; | |
225 | } | |
226 | ||
227 | #define ASLE_ALS_EN (1<<0) | |
228 | #define ASLE_BLC_EN (1<<1) | |
229 | #define ASLE_PFIT_EN (1<<2) | |
230 | #define ASLE_PFMB_EN (1<<3) | |
231 | ||
232 | void opregion_enable_asle(struct drm_device *dev) | |
233 | { | |
234 | struct drm_i915_private *dev_priv = dev->dev_private; | |
235 | struct opregion_asle *asle = dev_priv->opregion.asle; | |
236 | ||
237 | if (asle) { | |
8ee1c3db | 238 | if (IS_MOBILE(dev)) { |
7c463586 KP |
239 | unsigned long irqflags; |
240 | ||
241 | spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags); | |
242 | i915_enable_pipestat(dev_priv, 1, | |
243 | I915_LEGACY_BLC_EVENT_ENABLE); | |
244 | spin_unlock_irqrestore(&dev_priv->user_irq_lock, | |
245 | irqflags); | |
246 | } | |
8ee1c3db MG |
247 | |
248 | asle->tche = ASLE_ALS_EN | ASLE_BLC_EN | ASLE_PFIT_EN | | |
249 | ASLE_PFMB_EN; | |
250 | asle->ardy = 1; | |
251 | } | |
252 | } | |
253 | ||
254 | #define ACPI_EV_DISPLAY_SWITCH (1<<0) | |
255 | #define ACPI_EV_LID (1<<1) | |
256 | #define ACPI_EV_DOCK (1<<2) | |
257 | ||
258 | static struct intel_opregion *system_opregion; | |
259 | ||
260 | int intel_opregion_video_event(struct notifier_block *nb, unsigned long val, | |
261 | void *data) | |
262 | { | |
263 | /* The only video events relevant to opregion are 0x80. These indicate | |
264 | either a docking event, lid switch or display switch request. In | |
265 | Linux, these are handled by the dock, button and video drivers. | |
266 | We might want to fix the video driver to be opregion-aware in | |
267 | future, but right now we just indicate to the firmware that the | |
268 | request has been handled */ | |
269 | ||
270 | struct opregion_acpi *acpi; | |
271 | ||
272 | if (!system_opregion) | |
273 | return NOTIFY_DONE; | |
274 | ||
275 | acpi = system_opregion->acpi; | |
276 | acpi->csts = 0; | |
277 | ||
278 | return NOTIFY_OK; | |
279 | } | |
280 | ||
281 | static struct notifier_block intel_opregion_notifier = { | |
282 | .notifier_call = intel_opregion_video_event, | |
283 | }; | |
284 | ||
285 | int intel_opregion_init(struct drm_device *dev) | |
286 | { | |
287 | struct drm_i915_private *dev_priv = dev->dev_private; | |
288 | struct intel_opregion *opregion = &dev_priv->opregion; | |
289 | void *base; | |
290 | u32 asls, mboxes; | |
291 | int err = 0; | |
292 | ||
293 | pci_read_config_dword(dev->pdev, PCI_ASLS, &asls); | |
294 | DRM_DEBUG("graphic opregion physical addr: 0x%x\n", asls); | |
295 | if (asls == 0) { | |
296 | DRM_DEBUG("ACPI OpRegion not supported!\n"); | |
297 | return -ENOTSUPP; | |
298 | } | |
299 | ||
300 | base = ioremap(asls, OPREGION_SZ); | |
301 | if (!base) | |
302 | return -ENOMEM; | |
303 | ||
304 | opregion->header = base; | |
305 | if (memcmp(opregion->header->signature, OPREGION_SIGNATURE, 16)) { | |
306 | DRM_DEBUG("opregion signature mismatch\n"); | |
307 | err = -EINVAL; | |
308 | goto err_out; | |
309 | } | |
310 | ||
311 | mboxes = opregion->header->mboxes; | |
312 | if (mboxes & MBOX_ACPI) { | |
313 | DRM_DEBUG("Public ACPI methods supported\n"); | |
314 | opregion->acpi = base + OPREGION_ACPI_OFFSET; | |
315 | } else { | |
316 | DRM_DEBUG("Public ACPI methods not supported\n"); | |
317 | err = -ENOTSUPP; | |
318 | goto err_out; | |
319 | } | |
320 | opregion->enabled = 1; | |
321 | ||
322 | if (mboxes & MBOX_SWSCI) { | |
323 | DRM_DEBUG("SWSCI supported\n"); | |
324 | opregion->swsci = base + OPREGION_SWSCI_OFFSET; | |
325 | } | |
326 | if (mboxes & MBOX_ASLE) { | |
327 | DRM_DEBUG("ASLE supported\n"); | |
328 | opregion->asle = base + OPREGION_ASLE_OFFSET; | |
329 | } | |
330 | ||
331 | /* Notify BIOS we are ready to handle ACPI video ext notifs. | |
332 | * Right now, all the events are handled by the ACPI video module. | |
333 | * We don't actually need to do anything with them. */ | |
334 | opregion->acpi->csts = 0; | |
335 | opregion->acpi->drdy = 1; | |
336 | ||
337 | system_opregion = opregion; | |
338 | register_acpi_notifier(&intel_opregion_notifier); | |
339 | ||
340 | return 0; | |
341 | ||
342 | err_out: | |
343 | iounmap(opregion->header); | |
344 | opregion->header = NULL; | |
345 | return err; | |
346 | } | |
347 | ||
348 | void intel_opregion_free(struct drm_device *dev) | |
349 | { | |
350 | struct drm_i915_private *dev_priv = dev->dev_private; | |
351 | struct intel_opregion *opregion = &dev_priv->opregion; | |
352 | ||
353 | if (!opregion->enabled) | |
354 | return; | |
355 | ||
356 | opregion->acpi->drdy = 0; | |
357 | ||
358 | system_opregion = NULL; | |
359 | unregister_acpi_notifier(&intel_opregion_notifier); | |
360 | ||
361 | /* just clear all opregion memory pointers now */ | |
362 | iounmap(opregion->header); | |
363 | opregion->header = NULL; | |
364 | opregion->acpi = NULL; | |
365 | opregion->swsci = NULL; | |
366 | opregion->asle = NULL; | |
367 | ||
368 | opregion->enabled = 0; | |
369 | } |