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 #include <acpi/video.h>
30
31 #include "drmP.h"
32 #include "i915_drm.h"
33 #include "i915_drv.h"
34
35 #define PCI_ASLE 0xe4
36 #define PCI_LBPC 0xf4
37 #define PCI_ASLS 0xfc
38
39 #define OPREGION_SZ (8*1024)
40 #define OPREGION_HEADER_OFFSET 0
41 #define OPREGION_ACPI_OFFSET 0x100
42 #define OPREGION_SWSCI_OFFSET 0x200
43 #define OPREGION_ASLE_OFFSET 0x300
44 #define OPREGION_VBT_OFFSET 0x1000
45
46 #define OPREGION_SIGNATURE "IntelGraphicsMem"
47 #define MBOX_ACPI (1<<0)
48 #define MBOX_SWSCI (1<<1)
49 #define MBOX_ASLE (1<<2)
50
51 struct opregion_header {
52 u8 signature[16];
53 u32 size;
54 u32 opregion_ver;
55 u8 bios_ver[32];
56 u8 vbios_ver[16];
57 u8 driver_ver[16];
58 u32 mboxes;
59 u8 reserved[164];
60 } __attribute__((packed));
61
62 /* OpRegion mailbox #1: public ACPI methods */
63 struct opregion_acpi {
64 u32 drdy; /* driver readiness */
65 u32 csts; /* notification status */
66 u32 cevt; /* current event */
67 u8 rsvd1[20];
68 u32 didl[8]; /* supported display devices ID list */
69 u32 cpdl[8]; /* currently presented display list */
70 u32 cadl[8]; /* currently active display list */
71 u32 nadl[8]; /* next active devices list */
72 u32 aslp; /* ASL sleep time-out */
73 u32 tidx; /* toggle table index */
74 u32 chpd; /* current hotplug enable indicator */
75 u32 clid; /* current lid state*/
76 u32 cdck; /* current docking state */
77 u32 sxsw; /* Sx state resume */
78 u32 evts; /* ASL supported events */
79 u32 cnot; /* current OS notification */
80 u32 nrdy; /* driver status */
81 u8 rsvd2[60];
82 } __attribute__((packed));
83
84 /* OpRegion mailbox #2: SWSCI */
85 struct opregion_swsci {
86 u32 scic; /* SWSCI command|status|data */
87 u32 parm; /* command parameters */
88 u32 dslp; /* driver sleep time-out */
89 u8 rsvd[244];
90 } __attribute__((packed));
91
92 /* OpRegion mailbox #3: ASLE */
93 struct opregion_asle {
94 u32 ardy; /* driver readiness */
95 u32 aslc; /* ASLE interrupt command */
96 u32 tche; /* technology enabled indicator */
97 u32 alsi; /* current ALS illuminance reading */
98 u32 bclp; /* backlight brightness to set */
99 u32 pfit; /* panel fitting state */
100 u32 cblv; /* current brightness level */
101 u16 bclm[20]; /* backlight level duty cycle mapping table */
102 u32 cpfm; /* current panel fitting mode */
103 u32 epfm; /* enabled panel fitting modes */
104 u8 plut[74]; /* panel LUT and identifier */
105 u32 pfmb; /* PWM freq and min brightness */
106 u8 rsvd[102];
107 } __attribute__((packed));
108
109 /* ASLE irq request bits */
110 #define ASLE_SET_ALS_ILLUM (1 << 0)
111 #define ASLE_SET_BACKLIGHT (1 << 1)
112 #define ASLE_SET_PFIT (1 << 2)
113 #define ASLE_SET_PWM_FREQ (1 << 3)
114 #define ASLE_REQ_MSK 0xf
115
116 /* response bits of ASLE irq request */
117 #define ASLE_ALS_ILLUM_FAIL (2<<10)
118 #define ASLE_BACKLIGHT_FAIL (2<<12)
119 #define ASLE_PFIT_FAIL (2<<14)
120 #define ASLE_PWM_FREQ_FAIL (2<<16)
121
122 /* ASLE backlight brightness to set */
123 #define ASLE_BCLP_VALID (1<<31)
124 #define ASLE_BCLP_MSK (~(1<<31))
125
126 /* ASLE panel fitting request */
127 #define ASLE_PFIT_VALID (1<<31)
128 #define ASLE_PFIT_CENTER (1<<0)
129 #define ASLE_PFIT_STRETCH_TEXT (1<<1)
130 #define ASLE_PFIT_STRETCH_GFX (1<<2)
131
132 /* PWM frequency and minimum brightness */
133 #define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
134 #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
135 #define ASLE_PFMB_PWM_MASK (0x7ffffe00)
136 #define ASLE_PFMB_PWM_VALID (1<<31)
137
138 #define ASLE_CBLV_VALID (1<<31)
139
140 #define ACPI_OTHER_OUTPUT (0<<8)
141 #define ACPI_VGA_OUTPUT (1<<8)
142 #define ACPI_TV_OUTPUT (2<<8)
143 #define ACPI_DIGITAL_OUTPUT (3<<8)
144 #define ACPI_LVDS_OUTPUT (4<<8)
145
146 static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
147 {
148 struct drm_i915_private *dev_priv = dev->dev_private;
149 struct opregion_asle *asle = dev_priv->opregion.asle;
150 u32 blc_pwm_ctl, blc_pwm_ctl2;
151
152 if (!(bclp & ASLE_BCLP_VALID))
153 return ASLE_BACKLIGHT_FAIL;
154
155 bclp &= ASLE_BCLP_MSK;
156 if (bclp < 0 || bclp > 255)
157 return ASLE_BACKLIGHT_FAIL;
158
159 blc_pwm_ctl = I915_READ(BLC_PWM_CTL);
160 blc_pwm_ctl &= ~BACKLIGHT_DUTY_CYCLE_MASK;
161 blc_pwm_ctl2 = I915_READ(BLC_PWM_CTL2);
162
163 if (blc_pwm_ctl2 & BLM_COMBINATION_MODE)
164 pci_write_config_dword(dev->pdev, PCI_LBPC, bclp);
165 else
166 I915_WRITE(BLC_PWM_CTL, blc_pwm_ctl | ((bclp * 0x101)-1));
167
168 asle->cblv = (bclp*0x64)/0xff | ASLE_CBLV_VALID;
169
170 return 0;
171 }
172
173 static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
174 {
175 /* alsi is the current ALS reading in lux. 0 indicates below sensor
176 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
177 return 0;
178 }
179
180 static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
181 {
182 struct drm_i915_private *dev_priv = dev->dev_private;
183 if (pfmb & ASLE_PFMB_PWM_VALID) {
184 u32 blc_pwm_ctl = I915_READ(BLC_PWM_CTL);
185 u32 pwm = pfmb & ASLE_PFMB_PWM_MASK;
186 blc_pwm_ctl &= BACKLIGHT_DUTY_CYCLE_MASK;
187 pwm = pwm >> 9;
188 /* FIXME - what do we do with the PWM? */
189 }
190 return 0;
191 }
192
193 static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
194 {
195 /* Panel fitting is currently controlled by the X code, so this is a
196 noop until modesetting support works fully */
197 if (!(pfit & ASLE_PFIT_VALID))
198 return ASLE_PFIT_FAIL;
199 return 0;
200 }
201
202 void opregion_asle_intr(struct drm_device *dev)
203 {
204 struct drm_i915_private *dev_priv = dev->dev_private;
205 struct opregion_asle *asle = dev_priv->opregion.asle;
206 u32 asle_stat = 0;
207 u32 asle_req;
208
209 if (!asle)
210 return;
211
212 asle_req = asle->aslc & ASLE_REQ_MSK;
213
214 if (!asle_req) {
215 DRM_DEBUG("non asle set request??\n");
216 return;
217 }
218
219 if (asle_req & ASLE_SET_ALS_ILLUM)
220 asle_stat |= asle_set_als_illum(dev, asle->alsi);
221
222 if (asle_req & ASLE_SET_BACKLIGHT)
223 asle_stat |= asle_set_backlight(dev, asle->bclp);
224
225 if (asle_req & ASLE_SET_PFIT)
226 asle_stat |= asle_set_pfit(dev, asle->pfit);
227
228 if (asle_req & ASLE_SET_PWM_FREQ)
229 asle_stat |= asle_set_pwm_freq(dev, asle->pfmb);
230
231 asle->aslc = asle_stat;
232 }
233
234 #define ASLE_ALS_EN (1<<0)
235 #define ASLE_BLC_EN (1<<1)
236 #define ASLE_PFIT_EN (1<<2)
237 #define ASLE_PFMB_EN (1<<3)
238
239 void opregion_enable_asle(struct drm_device *dev)
240 {
241 struct drm_i915_private *dev_priv = dev->dev_private;
242 struct opregion_asle *asle = dev_priv->opregion.asle;
243
244 if (asle) {
245 if (IS_MOBILE(dev)) {
246 unsigned long irqflags;
247
248 spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags);
249 i915_enable_pipestat(dev_priv, 1,
250 I915_LEGACY_BLC_EVENT_ENABLE);
251 spin_unlock_irqrestore(&dev_priv->user_irq_lock,
252 irqflags);
253 }
254
255 asle->tche = ASLE_ALS_EN | ASLE_BLC_EN | ASLE_PFIT_EN |
256 ASLE_PFMB_EN;
257 asle->ardy = 1;
258 }
259 }
260
261 #define ACPI_EV_DISPLAY_SWITCH (1<<0)
262 #define ACPI_EV_LID (1<<1)
263 #define ACPI_EV_DOCK (1<<2)
264
265 static struct intel_opregion *system_opregion;
266
267 static int intel_opregion_video_event(struct notifier_block *nb,
268 unsigned long val, void *data)
269 {
270 /* The only video events relevant to opregion are 0x80. These indicate
271 either a docking event, lid switch or display switch request. In
272 Linux, these are handled by the dock, button and video drivers.
273 We might want to fix the video driver to be opregion-aware in
274 future, but right now we just indicate to the firmware that the
275 request has been handled */
276
277 struct opregion_acpi *acpi;
278
279 if (!system_opregion)
280 return NOTIFY_DONE;
281
282 acpi = system_opregion->acpi;
283 acpi->csts = 0;
284
285 return NOTIFY_OK;
286 }
287
288 static struct notifier_block intel_opregion_notifier = {
289 .notifier_call = intel_opregion_video_event,
290 };
291
292 /*
293 * Initialise the DIDL field in opregion. This passes a list of devices to
294 * the firmware. Values are defined by section B.4.2 of the ACPI specification
295 * (version 3)
296 */
297
298 static void intel_didl_outputs(struct drm_device *dev)
299 {
300 struct drm_i915_private *dev_priv = dev->dev_private;
301 struct intel_opregion *opregion = &dev_priv->opregion;
302 struct drm_connector *connector;
303 int i = 0;
304
305 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
306 int output_type = ACPI_OTHER_OUTPUT;
307 if (i >= 8) {
308 dev_printk (KERN_ERR, &dev->pdev->dev,
309 "More than 8 outputs detected\n");
310 return;
311 }
312 switch (connector->connector_type) {
313 case DRM_MODE_CONNECTOR_VGA:
314 case DRM_MODE_CONNECTOR_DVIA:
315 output_type = ACPI_VGA_OUTPUT;
316 break;
317 case DRM_MODE_CONNECTOR_Composite:
318 case DRM_MODE_CONNECTOR_SVIDEO:
319 case DRM_MODE_CONNECTOR_Component:
320 case DRM_MODE_CONNECTOR_9PinDIN:
321 output_type = ACPI_TV_OUTPUT;
322 break;
323 case DRM_MODE_CONNECTOR_DVII:
324 case DRM_MODE_CONNECTOR_DVID:
325 case DRM_MODE_CONNECTOR_DisplayPort:
326 case DRM_MODE_CONNECTOR_HDMIA:
327 case DRM_MODE_CONNECTOR_HDMIB:
328 output_type = ACPI_DIGITAL_OUTPUT;
329 break;
330 case DRM_MODE_CONNECTOR_LVDS:
331 output_type = ACPI_LVDS_OUTPUT;
332 break;
333 }
334 opregion->acpi->didl[i] |= (1<<31) | output_type | i;
335 i++;
336 }
337
338 /* If fewer than 8 outputs, the list must be null terminated */
339 if (i < 8)
340 opregion->acpi->didl[i] = 0;
341 }
342
343 int intel_opregion_init(struct drm_device *dev, int resume)
344 {
345 struct drm_i915_private *dev_priv = dev->dev_private;
346 struct intel_opregion *opregion = &dev_priv->opregion;
347 void *base;
348 u32 asls, mboxes;
349 int err = 0;
350
351 pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
352 DRM_DEBUG("graphic opregion physical addr: 0x%x\n", asls);
353 if (asls == 0) {
354 DRM_DEBUG("ACPI OpRegion not supported!\n");
355 return -ENOTSUPP;
356 }
357
358 base = ioremap(asls, OPREGION_SZ);
359 if (!base)
360 return -ENOMEM;
361
362 opregion->header = base;
363 if (memcmp(opregion->header->signature, OPREGION_SIGNATURE, 16)) {
364 DRM_DEBUG("opregion signature mismatch\n");
365 err = -EINVAL;
366 goto err_out;
367 }
368
369 mboxes = opregion->header->mboxes;
370 if (mboxes & MBOX_ACPI) {
371 DRM_DEBUG("Public ACPI methods supported\n");
372 opregion->acpi = base + OPREGION_ACPI_OFFSET;
373 if (drm_core_check_feature(dev, DRIVER_MODESET))
374 intel_didl_outputs(dev);
375 } else {
376 DRM_DEBUG("Public ACPI methods not supported\n");
377 err = -ENOTSUPP;
378 goto err_out;
379 }
380 opregion->enabled = 1;
381
382 if (mboxes & MBOX_SWSCI) {
383 DRM_DEBUG("SWSCI supported\n");
384 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
385 }
386 if (mboxes & MBOX_ASLE) {
387 DRM_DEBUG("ASLE supported\n");
388 opregion->asle = base + OPREGION_ASLE_OFFSET;
389 opregion_enable_asle(dev);
390 }
391
392 if (!resume)
393 acpi_video_register();
394
395
396 /* Notify BIOS we are ready to handle ACPI video ext notifs.
397 * Right now, all the events are handled by the ACPI video module.
398 * We don't actually need to do anything with them. */
399 opregion->acpi->csts = 0;
400 opregion->acpi->drdy = 1;
401
402 system_opregion = opregion;
403 register_acpi_notifier(&intel_opregion_notifier);
404
405 return 0;
406
407 err_out:
408 iounmap(opregion->header);
409 opregion->header = NULL;
410 return err;
411 }
412
413 void intel_opregion_free(struct drm_device *dev, int suspend)
414 {
415 struct drm_i915_private *dev_priv = dev->dev_private;
416 struct intel_opregion *opregion = &dev_priv->opregion;
417
418 if (!opregion->enabled)
419 return;
420
421 if (!suspend)
422 acpi_video_unregister();
423
424 opregion->acpi->drdy = 0;
425
426 system_opregion = NULL;
427 unregister_acpi_notifier(&intel_opregion_notifier);
428
429 /* just clear all opregion memory pointers now */
430 iounmap(opregion->header);
431 opregion->header = NULL;
432 opregion->acpi = NULL;
433 opregion->swsci = NULL;
434 opregion->asle = NULL;
435
436 opregion->enabled = 0;
437 }
438
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