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 <linux/dmi.h>
30  #include <linux/firmware.h>
31  #include <acpi/video.h>
32  
33  #include <drm/i915_drm.h>
34  
35  #include "display/intel_panel.h"
36  
37  #include "i915_drv.h"
38  #include "intel_display_types.h"
39  #include "intel_opregion.h"
40  
41  #define OPREGION_HEADER_OFFSET 0
42  #define OPREGION_ACPI_OFFSET   0x100
43  #define   ACPI_CLID 0x01ac /* current lid state indicator */
44  #define   ACPI_CDCK 0x01b0 /* current docking state indicator */
45  #define OPREGION_SWSCI_OFFSET  0x200
46  #define OPREGION_ASLE_OFFSET   0x300
47  #define OPREGION_VBT_OFFSET    0x400
48  #define OPREGION_ASLE_EXT_OFFSET	0x1C00
49  
50  #define OPREGION_SIGNATURE "IntelGraphicsMem"
51  #define MBOX_ACPI      (1<<0)
52  #define MBOX_SWSCI     (1<<1)
53  #define MBOX_ASLE      (1<<2)
54  #define MBOX_ASLE_EXT  (1<<4)
55  
56  struct opregion_header {
57  	u8 signature[16];
58  	u32 size;
59  	struct {
60  		u8 rsvd;
61  		u8 revision;
62  		u8 minor;
63  		u8 major;
64  	}  __packed over;
65  	u8 bios_ver[32];
66  	u8 vbios_ver[16];
67  	u8 driver_ver[16];
68  	u32 mboxes;
69  	u32 driver_model;
70  	u32 pcon;
71  	u8 dver[32];
72  	u8 rsvd[124];
73  } __packed;
74  
75  /* OpRegion mailbox #1: public ACPI methods */
76  struct opregion_acpi {
77  	u32 drdy;       /* driver readiness */
78  	u32 csts;       /* notification status */
79  	u32 cevt;       /* current event */
80  	u8 rsvd1[20];
81  	u32 didl[8];    /* supported display devices ID list */
82  	u32 cpdl[8];    /* currently presented display list */
83  	u32 cadl[8];    /* currently active display list */
84  	u32 nadl[8];    /* next active devices list */
85  	u32 aslp;       /* ASL sleep time-out */
86  	u32 tidx;       /* toggle table index */
87  	u32 chpd;       /* current hotplug enable indicator */
88  	u32 clid;       /* current lid state*/
89  	u32 cdck;       /* current docking state */
90  	u32 sxsw;       /* Sx state resume */
91  	u32 evts;       /* ASL supported events */
92  	u32 cnot;       /* current OS notification */
93  	u32 nrdy;       /* driver status */
94  	u32 did2[7];	/* extended supported display devices ID list */
95  	u32 cpd2[7];	/* extended attached display devices list */
96  	u8 rsvd2[4];
97  } __packed;
98  
99  /* OpRegion mailbox #2: SWSCI */
100  struct opregion_swsci {
101  	u32 scic;       /* SWSCI command|status|data */
102  	u32 parm;       /* command parameters */
103  	u32 dslp;       /* driver sleep time-out */
104  	u8 rsvd[244];
105  } __packed;
106  
107  /* OpRegion mailbox #3: ASLE */
108  struct opregion_asle {
109  	u32 ardy;       /* driver readiness */
110  	u32 aslc;       /* ASLE interrupt command */
111  	u32 tche;       /* technology enabled indicator */
112  	u32 alsi;       /* current ALS illuminance reading */
113  	u32 bclp;       /* backlight brightness to set */
114  	u32 pfit;       /* panel fitting state */
115  	u32 cblv;       /* current brightness level */
116  	u16 bclm[20];   /* backlight level duty cycle mapping table */
117  	u32 cpfm;       /* current panel fitting mode */
118  	u32 epfm;       /* enabled panel fitting modes */
119  	u8 plut[74];    /* panel LUT and identifier */
120  	u32 pfmb;       /* PWM freq and min brightness */
121  	u32 cddv;       /* color correction default values */
122  	u32 pcft;       /* power conservation features */
123  	u32 srot;       /* supported rotation angles */
124  	u32 iuer;       /* IUER events */
125  	u64 fdss;
126  	u32 fdsp;
127  	u32 stat;
128  	u64 rvda;	/* Physical (2.0) or relative from opregion (2.1+)
129  			 * address of raw VBT data. */
130  	u32 rvds;	/* Size of raw vbt data */
131  	u8 rsvd[58];
132  } __packed;
133  
134  /* OpRegion mailbox #5: ASLE ext */
135  struct opregion_asle_ext {
136  	u32 phed;	/* Panel Header */
137  	u8 bddc[256];	/* Panel EDID */
138  	u8 rsvd[764];
139  } __packed;
140  
141  /* Driver readiness indicator */
142  #define ASLE_ARDY_READY		(1 << 0)
143  #define ASLE_ARDY_NOT_READY	(0 << 0)
144  
145  /* ASLE Interrupt Command (ASLC) bits */
146  #define ASLC_SET_ALS_ILLUM		(1 << 0)
147  #define ASLC_SET_BACKLIGHT		(1 << 1)
148  #define ASLC_SET_PFIT			(1 << 2)
149  #define ASLC_SET_PWM_FREQ		(1 << 3)
150  #define ASLC_SUPPORTED_ROTATION_ANGLES	(1 << 4)
151  #define ASLC_BUTTON_ARRAY		(1 << 5)
152  #define ASLC_CONVERTIBLE_INDICATOR	(1 << 6)
153  #define ASLC_DOCKING_INDICATOR		(1 << 7)
154  #define ASLC_ISCT_STATE_CHANGE		(1 << 8)
155  #define ASLC_REQ_MSK			0x1ff
156  /* response bits */
157  #define ASLC_ALS_ILLUM_FAILED		(1 << 10)
158  #define ASLC_BACKLIGHT_FAILED		(1 << 12)
159  #define ASLC_PFIT_FAILED		(1 << 14)
160  #define ASLC_PWM_FREQ_FAILED		(1 << 16)
161  #define ASLC_ROTATION_ANGLES_FAILED	(1 << 18)
162  #define ASLC_BUTTON_ARRAY_FAILED	(1 << 20)
163  #define ASLC_CONVERTIBLE_FAILED		(1 << 22)
164  #define ASLC_DOCKING_FAILED		(1 << 24)
165  #define ASLC_ISCT_STATE_FAILED		(1 << 26)
166  
167  /* Technology enabled indicator */
168  #define ASLE_TCHE_ALS_EN	(1 << 0)
169  #define ASLE_TCHE_BLC_EN	(1 << 1)
170  #define ASLE_TCHE_PFIT_EN	(1 << 2)
171  #define ASLE_TCHE_PFMB_EN	(1 << 3)
172  
173  /* ASLE backlight brightness to set */
174  #define ASLE_BCLP_VALID                (1<<31)
175  #define ASLE_BCLP_MSK          (~(1<<31))
176  
177  /* ASLE panel fitting request */
178  #define ASLE_PFIT_VALID         (1<<31)
179  #define ASLE_PFIT_CENTER (1<<0)
180  #define ASLE_PFIT_STRETCH_TEXT (1<<1)
181  #define ASLE_PFIT_STRETCH_GFX (1<<2)
182  
183  /* PWM frequency and minimum brightness */
184  #define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
185  #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
186  #define ASLE_PFMB_PWM_MASK (0x7ffffe00)
187  #define ASLE_PFMB_PWM_VALID (1<<31)
188  
189  #define ASLE_CBLV_VALID         (1<<31)
190  
191  /* IUER */
192  #define ASLE_IUER_DOCKING		(1 << 7)
193  #define ASLE_IUER_CONVERTIBLE		(1 << 6)
194  #define ASLE_IUER_ROTATION_LOCK_BTN	(1 << 4)
195  #define ASLE_IUER_VOLUME_DOWN_BTN	(1 << 3)
196  #define ASLE_IUER_VOLUME_UP_BTN		(1 << 2)
197  #define ASLE_IUER_WINDOWS_BTN		(1 << 1)
198  #define ASLE_IUER_POWER_BTN		(1 << 0)
199  
200  /* Software System Control Interrupt (SWSCI) */
201  #define SWSCI_SCIC_INDICATOR		(1 << 0)
202  #define SWSCI_SCIC_MAIN_FUNCTION_SHIFT	1
203  #define SWSCI_SCIC_MAIN_FUNCTION_MASK	(0xf << 1)
204  #define SWSCI_SCIC_SUB_FUNCTION_SHIFT	8
205  #define SWSCI_SCIC_SUB_FUNCTION_MASK	(0xff << 8)
206  #define SWSCI_SCIC_EXIT_PARAMETER_SHIFT	8
207  #define SWSCI_SCIC_EXIT_PARAMETER_MASK	(0xff << 8)
208  #define SWSCI_SCIC_EXIT_STATUS_SHIFT	5
209  #define SWSCI_SCIC_EXIT_STATUS_MASK	(7 << 5)
210  #define SWSCI_SCIC_EXIT_STATUS_SUCCESS	1
211  
212  #define SWSCI_FUNCTION_CODE(main, sub) \
213  	((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \
214  	 (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT)
215  
216  /* SWSCI: Get BIOS Data (GBDA) */
217  #define SWSCI_GBDA			4
218  #define SWSCI_GBDA_SUPPORTED_CALLS	SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0)
219  #define SWSCI_GBDA_REQUESTED_CALLBACKS	SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1)
220  #define SWSCI_GBDA_BOOT_DISPLAY_PREF	SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4)
221  #define SWSCI_GBDA_PANEL_DETAILS	SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5)
222  #define SWSCI_GBDA_TV_STANDARD		SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6)
223  #define SWSCI_GBDA_INTERNAL_GRAPHICS	SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7)
224  #define SWSCI_GBDA_SPREAD_SPECTRUM	SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10)
225  
226  /* SWSCI: System BIOS Callbacks (SBCB) */
227  #define SWSCI_SBCB			6
228  #define SWSCI_SBCB_SUPPORTED_CALLBACKS	SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0)
229  #define SWSCI_SBCB_INIT_COMPLETION	SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1)
230  #define SWSCI_SBCB_PRE_HIRES_SET_MODE	SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3)
231  #define SWSCI_SBCB_POST_HIRES_SET_MODE	SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4)
232  #define SWSCI_SBCB_DISPLAY_SWITCH	SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5)
233  #define SWSCI_SBCB_SET_TV_FORMAT	SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6)
234  #define SWSCI_SBCB_ADAPTER_POWER_STATE	SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7)
235  #define SWSCI_SBCB_DISPLAY_POWER_STATE	SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8)
236  #define SWSCI_SBCB_SET_BOOT_DISPLAY	SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9)
237  #define SWSCI_SBCB_SET_PANEL_DETAILS	SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10)
238  #define SWSCI_SBCB_SET_INTERNAL_GFX	SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11)
239  #define SWSCI_SBCB_POST_HIRES_TO_DOS_FS	SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16)
240  #define SWSCI_SBCB_SUSPEND_RESUME	SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17)
241  #define SWSCI_SBCB_SET_SPREAD_SPECTRUM	SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18)
242  #define SWSCI_SBCB_POST_VBE_PM		SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19)
243  #define SWSCI_SBCB_ENABLE_DISABLE_AUDIO	SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21)
244  
245  /*
246   * ACPI Specification, Revision 5.0, Appendix B.3.2 _DOD (Enumerate All Devices
247   * Attached to the Display Adapter).
248   */
249  #define ACPI_DISPLAY_INDEX_SHIFT		0
250  #define ACPI_DISPLAY_INDEX_MASK			(0xf << 0)
251  #define ACPI_DISPLAY_PORT_ATTACHMENT_SHIFT	4
252  #define ACPI_DISPLAY_PORT_ATTACHMENT_MASK	(0xf << 4)
253  #define ACPI_DISPLAY_TYPE_SHIFT			8
254  #define ACPI_DISPLAY_TYPE_MASK			(0xf << 8)
255  #define ACPI_DISPLAY_TYPE_OTHER			(0 << 8)
256  #define ACPI_DISPLAY_TYPE_VGA			(1 << 8)
257  #define ACPI_DISPLAY_TYPE_TV			(2 << 8)
258  #define ACPI_DISPLAY_TYPE_EXTERNAL_DIGITAL	(3 << 8)
259  #define ACPI_DISPLAY_TYPE_INTERNAL_DIGITAL	(4 << 8)
260  #define ACPI_VENDOR_SPECIFIC_SHIFT		12
261  #define ACPI_VENDOR_SPECIFIC_MASK		(0xf << 12)
262  #define ACPI_BIOS_CAN_DETECT			(1 << 16)
263  #define ACPI_DEPENDS_ON_VGA			(1 << 17)
264  #define ACPI_PIPE_ID_SHIFT			18
265  #define ACPI_PIPE_ID_MASK			(7 << 18)
266  #define ACPI_DEVICE_ID_SCHEME			(1 << 31)
267  
268  #define MAX_DSLP	1500
269  
swsci(struct drm_i915_private * dev_priv,u32 function,u32 parm,u32 * parm_out)270  static int swsci(struct drm_i915_private *dev_priv,
271  		 u32 function, u32 parm, u32 *parm_out)
272  {
273  	struct opregion_swsci *swsci = dev_priv->opregion.swsci;
274  	struct pci_dev *pdev = dev_priv->drm.pdev;
275  	u32 main_function, sub_function, scic;
276  	u16 swsci_val;
277  	u32 dslp;
278  
279  	if (!swsci)
280  		return -ENODEV;
281  
282  	main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >>
283  		SWSCI_SCIC_MAIN_FUNCTION_SHIFT;
284  	sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >>
285  		SWSCI_SCIC_SUB_FUNCTION_SHIFT;
286  
287  	/* Check if we can call the function. See swsci_setup for details. */
288  	if (main_function == SWSCI_SBCB) {
289  		if ((dev_priv->opregion.swsci_sbcb_sub_functions &
290  		     (1 << sub_function)) == 0)
291  			return -EINVAL;
292  	} else if (main_function == SWSCI_GBDA) {
293  		if ((dev_priv->opregion.swsci_gbda_sub_functions &
294  		     (1 << sub_function)) == 0)
295  			return -EINVAL;
296  	}
297  
298  	/* Driver sleep timeout in ms. */
299  	dslp = swsci->dslp;
300  	if (!dslp) {
301  		/* The spec says 2ms should be the default, but it's too small
302  		 * for some machines. */
303  		dslp = 50;
304  	} else if (dslp > MAX_DSLP) {
305  		/* Hey bios, trust must be earned. */
306  		DRM_INFO_ONCE("ACPI BIOS requests an excessive sleep of %u ms, "
307  			      "using %u ms instead\n", dslp, MAX_DSLP);
308  		dslp = MAX_DSLP;
309  	}
310  
311  	/* The spec tells us to do this, but we are the only user... */
312  	scic = swsci->scic;
313  	if (scic & SWSCI_SCIC_INDICATOR) {
314  		DRM_DEBUG_DRIVER("SWSCI request already in progress\n");
315  		return -EBUSY;
316  	}
317  
318  	scic = function | SWSCI_SCIC_INDICATOR;
319  
320  	swsci->parm = parm;
321  	swsci->scic = scic;
322  
323  	/* Ensure SCI event is selected and event trigger is cleared. */
324  	pci_read_config_word(pdev, SWSCI, &swsci_val);
325  	if (!(swsci_val & SWSCI_SCISEL) || (swsci_val & SWSCI_GSSCIE)) {
326  		swsci_val |= SWSCI_SCISEL;
327  		swsci_val &= ~SWSCI_GSSCIE;
328  		pci_write_config_word(pdev, SWSCI, swsci_val);
329  	}
330  
331  	/* Use event trigger to tell bios to check the mail. */
332  	swsci_val |= SWSCI_GSSCIE;
333  	pci_write_config_word(pdev, SWSCI, swsci_val);
334  
335  	/* Poll for the result. */
336  #define C (((scic = swsci->scic) & SWSCI_SCIC_INDICATOR) == 0)
337  	if (wait_for(C, dslp)) {
338  		DRM_DEBUG_DRIVER("SWSCI request timed out\n");
339  		return -ETIMEDOUT;
340  	}
341  
342  	scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >>
343  		SWSCI_SCIC_EXIT_STATUS_SHIFT;
344  
345  	/* Note: scic == 0 is an error! */
346  	if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) {
347  		DRM_DEBUG_DRIVER("SWSCI request error %u\n", scic);
348  		return -EIO;
349  	}
350  
351  	if (parm_out)
352  		*parm_out = swsci->parm;
353  
354  	return 0;
355  
356  #undef C
357  }
358  
359  #define DISPLAY_TYPE_CRT			0
360  #define DISPLAY_TYPE_TV				1
361  #define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL	2
362  #define DISPLAY_TYPE_INTERNAL_FLAT_PANEL	3
363  
intel_opregion_notify_encoder(struct intel_encoder * intel_encoder,bool enable)364  int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder,
365  				  bool enable)
366  {
367  	struct drm_i915_private *dev_priv = to_i915(intel_encoder->base.dev);
368  	u32 parm = 0;
369  	u32 type = 0;
370  	u32 port;
371  
372  	/* don't care about old stuff for now */
373  	if (!HAS_DDI(dev_priv))
374  		return 0;
375  
376  	if (intel_encoder->type == INTEL_OUTPUT_DSI)
377  		port = 0;
378  	else
379  		port = intel_encoder->port;
380  
381  	if (port == PORT_E)  {
382  		port = 0;
383  	} else {
384  		parm |= 1 << port;
385  		port++;
386  	}
387  
388  	if (!enable)
389  		parm |= 4 << 8;
390  
391  	switch (intel_encoder->type) {
392  	case INTEL_OUTPUT_ANALOG:
393  		type = DISPLAY_TYPE_CRT;
394  		break;
395  	case INTEL_OUTPUT_DDI:
396  	case INTEL_OUTPUT_DP:
397  	case INTEL_OUTPUT_HDMI:
398  	case INTEL_OUTPUT_DP_MST:
399  		type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL;
400  		break;
401  	case INTEL_OUTPUT_EDP:
402  	case INTEL_OUTPUT_DSI:
403  		type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL;
404  		break;
405  	default:
406  		WARN_ONCE(1, "unsupported intel_encoder type %d\n",
407  			  intel_encoder->type);
408  		return -EINVAL;
409  	}
410  
411  	parm |= type << (16 + port * 3);
412  
413  	return swsci(dev_priv, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL);
414  }
415  
416  static const struct {
417  	pci_power_t pci_power_state;
418  	u32 parm;
419  } power_state_map[] = {
420  	{ PCI_D0,	0x00 },
421  	{ PCI_D1,	0x01 },
422  	{ PCI_D2,	0x02 },
423  	{ PCI_D3hot,	0x04 },
424  	{ PCI_D3cold,	0x04 },
425  };
426  
intel_opregion_notify_adapter(struct drm_i915_private * dev_priv,pci_power_t state)427  int intel_opregion_notify_adapter(struct drm_i915_private *dev_priv,
428  				  pci_power_t state)
429  {
430  	int i;
431  
432  	if (!HAS_DDI(dev_priv))
433  		return 0;
434  
435  	for (i = 0; i < ARRAY_SIZE(power_state_map); i++) {
436  		if (state == power_state_map[i].pci_power_state)
437  			return swsci(dev_priv, SWSCI_SBCB_ADAPTER_POWER_STATE,
438  				     power_state_map[i].parm, NULL);
439  	}
440  
441  	return -EINVAL;
442  }
443  
asle_set_backlight(struct drm_i915_private * dev_priv,u32 bclp)444  static u32 asle_set_backlight(struct drm_i915_private *dev_priv, u32 bclp)
445  {
446  	struct intel_connector *connector;
447  	struct drm_connector_list_iter conn_iter;
448  	struct opregion_asle *asle = dev_priv->opregion.asle;
449  	struct drm_device *dev = &dev_priv->drm;
450  
451  	DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
452  
453  	if (acpi_video_get_backlight_type() == acpi_backlight_native) {
454  		DRM_DEBUG_KMS("opregion backlight request ignored\n");
455  		return 0;
456  	}
457  
458  	if (!(bclp & ASLE_BCLP_VALID))
459  		return ASLC_BACKLIGHT_FAILED;
460  
461  	bclp &= ASLE_BCLP_MSK;
462  	if (bclp > 255)
463  		return ASLC_BACKLIGHT_FAILED;
464  
465  	drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
466  
467  	/*
468  	 * Update backlight on all connectors that support backlight (usually
469  	 * only one).
470  	 */
471  	DRM_DEBUG_KMS("updating opregion backlight %d/255\n", bclp);
472  	drm_connector_list_iter_begin(dev, &conn_iter);
473  	for_each_intel_connector_iter(connector, &conn_iter)
474  		intel_panel_set_backlight_acpi(connector->base.state, bclp, 255);
475  	drm_connector_list_iter_end(&conn_iter);
476  	asle->cblv = DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID;
477  
478  	drm_modeset_unlock(&dev->mode_config.connection_mutex);
479  
480  
481  	return 0;
482  }
483  
asle_set_als_illum(struct drm_i915_private * dev_priv,u32 alsi)484  static u32 asle_set_als_illum(struct drm_i915_private *dev_priv, u32 alsi)
485  {
486  	/* alsi is the current ALS reading in lux. 0 indicates below sensor
487  	   range, 0xffff indicates above sensor range. 1-0xfffe are valid */
488  	DRM_DEBUG_DRIVER("Illum is not supported\n");
489  	return ASLC_ALS_ILLUM_FAILED;
490  }
491  
asle_set_pwm_freq(struct drm_i915_private * dev_priv,u32 pfmb)492  static u32 asle_set_pwm_freq(struct drm_i915_private *dev_priv, u32 pfmb)
493  {
494  	DRM_DEBUG_DRIVER("PWM freq is not supported\n");
495  	return ASLC_PWM_FREQ_FAILED;
496  }
497  
asle_set_pfit(struct drm_i915_private * dev_priv,u32 pfit)498  static u32 asle_set_pfit(struct drm_i915_private *dev_priv, u32 pfit)
499  {
500  	/* Panel fitting is currently controlled by the X code, so this is a
501  	   noop until modesetting support works fully */
502  	DRM_DEBUG_DRIVER("Pfit is not supported\n");
503  	return ASLC_PFIT_FAILED;
504  }
505  
asle_set_supported_rotation_angles(struct drm_i915_private * dev_priv,u32 srot)506  static u32 asle_set_supported_rotation_angles(struct drm_i915_private *dev_priv, u32 srot)
507  {
508  	DRM_DEBUG_DRIVER("SROT is not supported\n");
509  	return ASLC_ROTATION_ANGLES_FAILED;
510  }
511  
asle_set_button_array(struct drm_i915_private * dev_priv,u32 iuer)512  static u32 asle_set_button_array(struct drm_i915_private *dev_priv, u32 iuer)
513  {
514  	if (!iuer)
515  		DRM_DEBUG_DRIVER("Button array event is not supported (nothing)\n");
516  	if (iuer & ASLE_IUER_ROTATION_LOCK_BTN)
517  		DRM_DEBUG_DRIVER("Button array event is not supported (rotation lock)\n");
518  	if (iuer & ASLE_IUER_VOLUME_DOWN_BTN)
519  		DRM_DEBUG_DRIVER("Button array event is not supported (volume down)\n");
520  	if (iuer & ASLE_IUER_VOLUME_UP_BTN)
521  		DRM_DEBUG_DRIVER("Button array event is not supported (volume up)\n");
522  	if (iuer & ASLE_IUER_WINDOWS_BTN)
523  		DRM_DEBUG_DRIVER("Button array event is not supported (windows)\n");
524  	if (iuer & ASLE_IUER_POWER_BTN)
525  		DRM_DEBUG_DRIVER("Button array event is not supported (power)\n");
526  
527  	return ASLC_BUTTON_ARRAY_FAILED;
528  }
529  
asle_set_convertible(struct drm_i915_private * dev_priv,u32 iuer)530  static u32 asle_set_convertible(struct drm_i915_private *dev_priv, u32 iuer)
531  {
532  	if (iuer & ASLE_IUER_CONVERTIBLE)
533  		DRM_DEBUG_DRIVER("Convertible is not supported (clamshell)\n");
534  	else
535  		DRM_DEBUG_DRIVER("Convertible is not supported (slate)\n");
536  
537  	return ASLC_CONVERTIBLE_FAILED;
538  }
539  
asle_set_docking(struct drm_i915_private * dev_priv,u32 iuer)540  static u32 asle_set_docking(struct drm_i915_private *dev_priv, u32 iuer)
541  {
542  	if (iuer & ASLE_IUER_DOCKING)
543  		DRM_DEBUG_DRIVER("Docking is not supported (docked)\n");
544  	else
545  		DRM_DEBUG_DRIVER("Docking is not supported (undocked)\n");
546  
547  	return ASLC_DOCKING_FAILED;
548  }
549  
asle_isct_state(struct drm_i915_private * dev_priv)550  static u32 asle_isct_state(struct drm_i915_private *dev_priv)
551  {
552  	DRM_DEBUG_DRIVER("ISCT is not supported\n");
553  	return ASLC_ISCT_STATE_FAILED;
554  }
555  
asle_work(struct work_struct * work)556  static void asle_work(struct work_struct *work)
557  {
558  	struct intel_opregion *opregion =
559  		container_of(work, struct intel_opregion, asle_work);
560  	struct drm_i915_private *dev_priv =
561  		container_of(opregion, struct drm_i915_private, opregion);
562  	struct opregion_asle *asle = dev_priv->opregion.asle;
563  	u32 aslc_stat = 0;
564  	u32 aslc_req;
565  
566  	if (!asle)
567  		return;
568  
569  	aslc_req = asle->aslc;
570  
571  	if (!(aslc_req & ASLC_REQ_MSK)) {
572  		DRM_DEBUG_DRIVER("No request on ASLC interrupt 0x%08x\n",
573  				 aslc_req);
574  		return;
575  	}
576  
577  	if (aslc_req & ASLC_SET_ALS_ILLUM)
578  		aslc_stat |= asle_set_als_illum(dev_priv, asle->alsi);
579  
580  	if (aslc_req & ASLC_SET_BACKLIGHT)
581  		aslc_stat |= asle_set_backlight(dev_priv, asle->bclp);
582  
583  	if (aslc_req & ASLC_SET_PFIT)
584  		aslc_stat |= asle_set_pfit(dev_priv, asle->pfit);
585  
586  	if (aslc_req & ASLC_SET_PWM_FREQ)
587  		aslc_stat |= asle_set_pwm_freq(dev_priv, asle->pfmb);
588  
589  	if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES)
590  		aslc_stat |= asle_set_supported_rotation_angles(dev_priv,
591  							asle->srot);
592  
593  	if (aslc_req & ASLC_BUTTON_ARRAY)
594  		aslc_stat |= asle_set_button_array(dev_priv, asle->iuer);
595  
596  	if (aslc_req & ASLC_CONVERTIBLE_INDICATOR)
597  		aslc_stat |= asle_set_convertible(dev_priv, asle->iuer);
598  
599  	if (aslc_req & ASLC_DOCKING_INDICATOR)
600  		aslc_stat |= asle_set_docking(dev_priv, asle->iuer);
601  
602  	if (aslc_req & ASLC_ISCT_STATE_CHANGE)
603  		aslc_stat |= asle_isct_state(dev_priv);
604  
605  	asle->aslc = aslc_stat;
606  }
607  
intel_opregion_asle_intr(struct drm_i915_private * dev_priv)608  void intel_opregion_asle_intr(struct drm_i915_private *dev_priv)
609  {
610  	if (dev_priv->opregion.asle)
611  		schedule_work(&dev_priv->opregion.asle_work);
612  }
613  
614  #define ACPI_EV_DISPLAY_SWITCH (1<<0)
615  #define ACPI_EV_LID            (1<<1)
616  #define ACPI_EV_DOCK           (1<<2)
617  
618  /*
619   * The only video events relevant to opregion are 0x80. These indicate either a
620   * docking event, lid switch or display switch request. In Linux, these are
621   * handled by the dock, button and video drivers.
622   */
intel_opregion_video_event(struct notifier_block * nb,unsigned long val,void * data)623  static int intel_opregion_video_event(struct notifier_block *nb,
624  				      unsigned long val, void *data)
625  {
626  	struct intel_opregion *opregion = container_of(nb, struct intel_opregion,
627  						       acpi_notifier);
628  	struct acpi_bus_event *event = data;
629  	struct opregion_acpi *acpi;
630  	int ret = NOTIFY_OK;
631  
632  	if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
633  		return NOTIFY_DONE;
634  
635  	acpi = opregion->acpi;
636  
637  	if (event->type == 0x80 && ((acpi->cevt & 1) == 0))
638  		ret = NOTIFY_BAD;
639  
640  	acpi->csts = 0;
641  
642  	return ret;
643  }
644  
645  /*
646   * Initialise the DIDL field in opregion. This passes a list of devices to
647   * the firmware. Values are defined by section B.4.2 of the ACPI specification
648   * (version 3)
649   */
650  
set_did(struct intel_opregion * opregion,int i,u32 val)651  static void set_did(struct intel_opregion *opregion, int i, u32 val)
652  {
653  	if (i < ARRAY_SIZE(opregion->acpi->didl)) {
654  		opregion->acpi->didl[i] = val;
655  	} else {
656  		i -= ARRAY_SIZE(opregion->acpi->didl);
657  
658  		if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2)))
659  			return;
660  
661  		opregion->acpi->did2[i] = val;
662  	}
663  }
664  
acpi_display_type(struct intel_connector * connector)665  static u32 acpi_display_type(struct intel_connector *connector)
666  {
667  	u32 display_type;
668  
669  	switch (connector->base.connector_type) {
670  	case DRM_MODE_CONNECTOR_VGA:
671  	case DRM_MODE_CONNECTOR_DVIA:
672  		display_type = ACPI_DISPLAY_TYPE_VGA;
673  		break;
674  	case DRM_MODE_CONNECTOR_Composite:
675  	case DRM_MODE_CONNECTOR_SVIDEO:
676  	case DRM_MODE_CONNECTOR_Component:
677  	case DRM_MODE_CONNECTOR_9PinDIN:
678  	case DRM_MODE_CONNECTOR_TV:
679  		display_type = ACPI_DISPLAY_TYPE_TV;
680  		break;
681  	case DRM_MODE_CONNECTOR_DVII:
682  	case DRM_MODE_CONNECTOR_DVID:
683  	case DRM_MODE_CONNECTOR_DisplayPort:
684  	case DRM_MODE_CONNECTOR_HDMIA:
685  	case DRM_MODE_CONNECTOR_HDMIB:
686  		display_type = ACPI_DISPLAY_TYPE_EXTERNAL_DIGITAL;
687  		break;
688  	case DRM_MODE_CONNECTOR_LVDS:
689  	case DRM_MODE_CONNECTOR_eDP:
690  	case DRM_MODE_CONNECTOR_DSI:
691  		display_type = ACPI_DISPLAY_TYPE_INTERNAL_DIGITAL;
692  		break;
693  	case DRM_MODE_CONNECTOR_Unknown:
694  	case DRM_MODE_CONNECTOR_VIRTUAL:
695  		display_type = ACPI_DISPLAY_TYPE_OTHER;
696  		break;
697  	default:
698  		MISSING_CASE(connector->base.connector_type);
699  		display_type = ACPI_DISPLAY_TYPE_OTHER;
700  		break;
701  	}
702  
703  	return display_type;
704  }
705  
intel_didl_outputs(struct drm_i915_private * dev_priv)706  static void intel_didl_outputs(struct drm_i915_private *dev_priv)
707  {
708  	struct intel_opregion *opregion = &dev_priv->opregion;
709  	struct intel_connector *connector;
710  	struct drm_connector_list_iter conn_iter;
711  	int i = 0, max_outputs;
712  	int display_index[16] = {};
713  
714  	/*
715  	 * In theory, did2, the extended didl, gets added at opregion version
716  	 * 3.0. In practice, however, we're supposed to set it for earlier
717  	 * versions as well, since a BIOS that doesn't understand did2 should
718  	 * not look at it anyway. Use a variable so we can tweak this if a need
719  	 * arises later.
720  	 */
721  	max_outputs = ARRAY_SIZE(opregion->acpi->didl) +
722  		ARRAY_SIZE(opregion->acpi->did2);
723  
724  	drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter);
725  	for_each_intel_connector_iter(connector, &conn_iter) {
726  		u32 device_id, type;
727  
728  		device_id = acpi_display_type(connector);
729  
730  		/* Use display type specific display index. */
731  		type = (device_id & ACPI_DISPLAY_TYPE_MASK)
732  			>> ACPI_DISPLAY_TYPE_SHIFT;
733  		device_id |= display_index[type]++ << ACPI_DISPLAY_INDEX_SHIFT;
734  
735  		connector->acpi_device_id = device_id;
736  		if (i < max_outputs)
737  			set_did(opregion, i, device_id);
738  		i++;
739  	}
740  	drm_connector_list_iter_end(&conn_iter);
741  
742  	DRM_DEBUG_KMS("%d outputs detected\n", i);
743  
744  	if (i > max_outputs)
745  		DRM_ERROR("More than %d outputs in connector list\n",
746  			  max_outputs);
747  
748  	/* If fewer than max outputs, the list must be null terminated */
749  	if (i < max_outputs)
750  		set_did(opregion, i, 0);
751  }
752  
intel_setup_cadls(struct drm_i915_private * dev_priv)753  static void intel_setup_cadls(struct drm_i915_private *dev_priv)
754  {
755  	struct intel_opregion *opregion = &dev_priv->opregion;
756  	struct intel_connector *connector;
757  	struct drm_connector_list_iter conn_iter;
758  	int i = 0;
759  
760  	/*
761  	 * Initialize the CADL field from the connector device ids. This is
762  	 * essentially the same as copying from the DIDL. Technically, this is
763  	 * not always correct as display outputs may exist, but not active. This
764  	 * initialization is necessary for some Clevo laptops that check this
765  	 * field before processing the brightness and display switching hotkeys.
766  	 *
767  	 * Note that internal panels should be at the front of the connector
768  	 * list already, ensuring they're not left out.
769  	 */
770  	drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter);
771  	for_each_intel_connector_iter(connector, &conn_iter) {
772  		if (i >= ARRAY_SIZE(opregion->acpi->cadl))
773  			break;
774  		opregion->acpi->cadl[i++] = connector->acpi_device_id;
775  	}
776  	drm_connector_list_iter_end(&conn_iter);
777  
778  	/* If fewer than 8 active devices, the list must be null terminated */
779  	if (i < ARRAY_SIZE(opregion->acpi->cadl))
780  		opregion->acpi->cadl[i] = 0;
781  }
782  
swsci_setup(struct drm_i915_private * dev_priv)783  static void swsci_setup(struct drm_i915_private *dev_priv)
784  {
785  	struct intel_opregion *opregion = &dev_priv->opregion;
786  	bool requested_callbacks = false;
787  	u32 tmp;
788  
789  	/* Sub-function code 0 is okay, let's allow them. */
790  	opregion->swsci_gbda_sub_functions = 1;
791  	opregion->swsci_sbcb_sub_functions = 1;
792  
793  	/* We use GBDA to ask for supported GBDA calls. */
794  	if (swsci(dev_priv, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) {
795  		/* make the bits match the sub-function codes */
796  		tmp <<= 1;
797  		opregion->swsci_gbda_sub_functions |= tmp;
798  	}
799  
800  	/*
801  	 * We also use GBDA to ask for _requested_ SBCB callbacks. The driver
802  	 * must not call interfaces that are not specifically requested by the
803  	 * bios.
804  	 */
805  	if (swsci(dev_priv, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) {
806  		/* here, the bits already match sub-function codes */
807  		opregion->swsci_sbcb_sub_functions |= tmp;
808  		requested_callbacks = true;
809  	}
810  
811  	/*
812  	 * But we use SBCB to ask for _supported_ SBCB calls. This does not mean
813  	 * the callback is _requested_. But we still can't call interfaces that
814  	 * are not requested.
815  	 */
816  	if (swsci(dev_priv, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) {
817  		/* make the bits match the sub-function codes */
818  		u32 low = tmp & 0x7ff;
819  		u32 high = tmp & ~0xfff; /* bit 11 is reserved */
820  		tmp = (high << 4) | (low << 1) | 1;
821  
822  		/* best guess what to do with supported wrt requested */
823  		if (requested_callbacks) {
824  			u32 req = opregion->swsci_sbcb_sub_functions;
825  			if ((req & tmp) != req)
826  				DRM_DEBUG_DRIVER("SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", req, tmp);
827  			/* XXX: for now, trust the requested callbacks */
828  			/* opregion->swsci_sbcb_sub_functions &= tmp; */
829  		} else {
830  			opregion->swsci_sbcb_sub_functions |= tmp;
831  		}
832  	}
833  
834  	DRM_DEBUG_DRIVER("SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",
835  			 opregion->swsci_gbda_sub_functions,
836  			 opregion->swsci_sbcb_sub_functions);
837  }
838  
intel_no_opregion_vbt_callback(const struct dmi_system_id * id)839  static int intel_no_opregion_vbt_callback(const struct dmi_system_id *id)
840  {
841  	DRM_DEBUG_KMS("Falling back to manually reading VBT from "
842  		      "VBIOS ROM for %s\n", id->ident);
843  	return 1;
844  }
845  
846  static const struct dmi_system_id intel_no_opregion_vbt[] = {
847  	{
848  		.callback = intel_no_opregion_vbt_callback,
849  		.ident = "ThinkCentre A57",
850  		.matches = {
851  			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
852  			DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"),
853  		},
854  	},
855  	{ }
856  };
857  
intel_load_vbt_firmware(struct drm_i915_private * dev_priv)858  static int intel_load_vbt_firmware(struct drm_i915_private *dev_priv)
859  {
860  	struct intel_opregion *opregion = &dev_priv->opregion;
861  	const struct firmware *fw = NULL;
862  	const char *name = i915_modparams.vbt_firmware;
863  	int ret;
864  
865  	if (!name || !*name)
866  		return -ENOENT;
867  
868  	ret = request_firmware(&fw, name, &dev_priv->drm.pdev->dev);
869  	if (ret) {
870  		DRM_ERROR("Requesting VBT firmware \"%s\" failed (%d)\n",
871  			  name, ret);
872  		return ret;
873  	}
874  
875  	if (intel_bios_is_valid_vbt(fw->data, fw->size)) {
876  		opregion->vbt_firmware = kmemdup(fw->data, fw->size, GFP_KERNEL);
877  		if (opregion->vbt_firmware) {
878  			DRM_DEBUG_KMS("Found valid VBT firmware \"%s\"\n", name);
879  			opregion->vbt = opregion->vbt_firmware;
880  			opregion->vbt_size = fw->size;
881  			ret = 0;
882  		} else {
883  			ret = -ENOMEM;
884  		}
885  	} else {
886  		DRM_DEBUG_KMS("Invalid VBT firmware \"%s\"\n", name);
887  		ret = -EINVAL;
888  	}
889  
890  	release_firmware(fw);
891  
892  	return ret;
893  }
894  
intel_opregion_setup(struct drm_i915_private * dev_priv)895  int intel_opregion_setup(struct drm_i915_private *dev_priv)
896  {
897  	struct intel_opregion *opregion = &dev_priv->opregion;
898  	struct pci_dev *pdev = dev_priv->drm.pdev;
899  	u32 asls, mboxes;
900  	char buf[sizeof(OPREGION_SIGNATURE)];
901  	int err = 0;
902  	void *base;
903  	const void *vbt;
904  	u32 vbt_size;
905  
906  	BUILD_BUG_ON(sizeof(struct opregion_header) != 0x100);
907  	BUILD_BUG_ON(sizeof(struct opregion_acpi) != 0x100);
908  	BUILD_BUG_ON(sizeof(struct opregion_swsci) != 0x100);
909  	BUILD_BUG_ON(sizeof(struct opregion_asle) != 0x100);
910  	BUILD_BUG_ON(sizeof(struct opregion_asle_ext) != 0x400);
911  
912  	pci_read_config_dword(pdev, ASLS, &asls);
913  	DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
914  	if (asls == 0) {
915  		DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
916  		return -ENOTSUPP;
917  	}
918  
919  	INIT_WORK(&opregion->asle_work, asle_work);
920  
921  	base = memremap(asls, OPREGION_SIZE, MEMREMAP_WB);
922  	if (!base)
923  		return -ENOMEM;
924  
925  	memcpy(buf, base, sizeof(buf));
926  
927  	if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
928  		DRM_DEBUG_DRIVER("opregion signature mismatch\n");
929  		err = -EINVAL;
930  		goto err_out;
931  	}
932  	opregion->header = base;
933  	opregion->lid_state = base + ACPI_CLID;
934  
935  	DRM_DEBUG_DRIVER("ACPI OpRegion version %u.%u.%u\n",
936  			 opregion->header->over.major,
937  			 opregion->header->over.minor,
938  			 opregion->header->over.revision);
939  
940  	mboxes = opregion->header->mboxes;
941  	if (mboxes & MBOX_ACPI) {
942  		DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
943  		opregion->acpi = base + OPREGION_ACPI_OFFSET;
944  	}
945  
946  	if (mboxes & MBOX_SWSCI) {
947  		DRM_DEBUG_DRIVER("SWSCI supported\n");
948  		opregion->swsci = base + OPREGION_SWSCI_OFFSET;
949  		swsci_setup(dev_priv);
950  	}
951  
952  	if (mboxes & MBOX_ASLE) {
953  		DRM_DEBUG_DRIVER("ASLE supported\n");
954  		opregion->asle = base + OPREGION_ASLE_OFFSET;
955  
956  		opregion->asle->ardy = ASLE_ARDY_NOT_READY;
957  	}
958  
959  	if (mboxes & MBOX_ASLE_EXT)
960  		DRM_DEBUG_DRIVER("ASLE extension supported\n");
961  
962  	if (intel_load_vbt_firmware(dev_priv) == 0)
963  		goto out;
964  
965  	if (dmi_check_system(intel_no_opregion_vbt))
966  		goto out;
967  
968  	if (opregion->header->over.major >= 2 && opregion->asle &&
969  	    opregion->asle->rvda && opregion->asle->rvds) {
970  		resource_size_t rvda = opregion->asle->rvda;
971  
972  		/*
973  		 * opregion 2.0: rvda is the physical VBT address.
974  		 *
975  		 * opregion 2.1+: rvda is unsigned, relative offset from
976  		 * opregion base, and should never point within opregion.
977  		 */
978  		if (opregion->header->over.major > 2 ||
979  		    opregion->header->over.minor >= 1) {
980  			WARN_ON(rvda < OPREGION_SIZE);
981  
982  			rvda += asls;
983  		}
984  
985  		opregion->rvda = memremap(rvda, opregion->asle->rvds,
986  					  MEMREMAP_WB);
987  
988  		vbt = opregion->rvda;
989  		vbt_size = opregion->asle->rvds;
990  		if (intel_bios_is_valid_vbt(vbt, vbt_size)) {
991  			DRM_DEBUG_KMS("Found valid VBT in ACPI OpRegion (RVDA)\n");
992  			opregion->vbt = vbt;
993  			opregion->vbt_size = vbt_size;
994  			goto out;
995  		} else {
996  			DRM_DEBUG_KMS("Invalid VBT in ACPI OpRegion (RVDA)\n");
997  			memunmap(opregion->rvda);
998  			opregion->rvda = NULL;
999  		}
1000  	}
1001  
1002  	vbt = base + OPREGION_VBT_OFFSET;
1003  	/*
1004  	 * The VBT specification says that if the ASLE ext mailbox is not used
1005  	 * its area is reserved, but on some CHT boards the VBT extends into the
1006  	 * ASLE ext area. Allow this even though it is against the spec, so we
1007  	 * do not end up rejecting the VBT on those boards (and end up not
1008  	 * finding the LCD panel because of this).
1009  	 */
1010  	vbt_size = (mboxes & MBOX_ASLE_EXT) ?
1011  		OPREGION_ASLE_EXT_OFFSET : OPREGION_SIZE;
1012  	vbt_size -= OPREGION_VBT_OFFSET;
1013  	if (intel_bios_is_valid_vbt(vbt, vbt_size)) {
1014  		DRM_DEBUG_KMS("Found valid VBT in ACPI OpRegion (Mailbox #4)\n");
1015  		opregion->vbt = vbt;
1016  		opregion->vbt_size = vbt_size;
1017  	} else {
1018  		DRM_DEBUG_KMS("Invalid VBT in ACPI OpRegion (Mailbox #4)\n");
1019  	}
1020  
1021  out:
1022  	return 0;
1023  
1024  err_out:
1025  	memunmap(base);
1026  	return err;
1027  }
1028  
intel_use_opregion_panel_type_callback(const struct dmi_system_id * id)1029  static int intel_use_opregion_panel_type_callback(const struct dmi_system_id *id)
1030  {
1031  	DRM_INFO("Using panel type from OpRegion on %s\n", id->ident);
1032  	return 1;
1033  }
1034  
1035  static const struct dmi_system_id intel_use_opregion_panel_type[] = {
1036  	{
1037  		.callback = intel_use_opregion_panel_type_callback,
1038  		.ident = "Conrac GmbH IX45GM2",
1039  		.matches = {DMI_MATCH(DMI_SYS_VENDOR, "Conrac GmbH"),
1040  			    DMI_MATCH(DMI_PRODUCT_NAME, "IX45GM2"),
1041  		},
1042  	},
1043  	{ }
1044  };
1045  
1046  int
intel_opregion_get_panel_type(struct drm_i915_private * dev_priv)1047  intel_opregion_get_panel_type(struct drm_i915_private *dev_priv)
1048  {
1049  	u32 panel_details;
1050  	int ret;
1051  
1052  	ret = swsci(dev_priv, SWSCI_GBDA_PANEL_DETAILS, 0x0, &panel_details);
1053  	if (ret) {
1054  		DRM_DEBUG_KMS("Failed to get panel details from OpRegion (%d)\n",
1055  			      ret);
1056  		return ret;
1057  	}
1058  
1059  	ret = (panel_details >> 8) & 0xff;
1060  	if (ret > 0x10) {
1061  		DRM_DEBUG_KMS("Invalid OpRegion panel type 0x%x\n", ret);
1062  		return -EINVAL;
1063  	}
1064  
1065  	/* fall back to VBT panel type? */
1066  	if (ret == 0x0) {
1067  		DRM_DEBUG_KMS("No panel type in OpRegion\n");
1068  		return -ENODEV;
1069  	}
1070  
1071  	/*
1072  	 * So far we know that some machined must use it, others must not use it.
1073  	 * There doesn't seem to be any way to determine which way to go, except
1074  	 * via a quirk list :(
1075  	 */
1076  	if (!dmi_check_system(intel_use_opregion_panel_type)) {
1077  		DRM_DEBUG_KMS("Ignoring OpRegion panel type (%d)\n", ret - 1);
1078  		return -ENODEV;
1079  	}
1080  
1081  	return ret - 1;
1082  }
1083  
intel_opregion_register(struct drm_i915_private * i915)1084  void intel_opregion_register(struct drm_i915_private *i915)
1085  {
1086  	struct intel_opregion *opregion = &i915->opregion;
1087  
1088  	if (!opregion->header)
1089  		return;
1090  
1091  	if (opregion->acpi) {
1092  		opregion->acpi_notifier.notifier_call =
1093  			intel_opregion_video_event;
1094  		register_acpi_notifier(&opregion->acpi_notifier);
1095  	}
1096  
1097  	intel_opregion_resume(i915);
1098  }
1099  
intel_opregion_resume(struct drm_i915_private * i915)1100  void intel_opregion_resume(struct drm_i915_private *i915)
1101  {
1102  	struct intel_opregion *opregion = &i915->opregion;
1103  
1104  	if (!opregion->header)
1105  		return;
1106  
1107  	if (opregion->acpi) {
1108  		intel_didl_outputs(i915);
1109  		intel_setup_cadls(i915);
1110  
1111  		/*
1112  		 * Notify BIOS we are ready to handle ACPI video ext notifs.
1113  		 * Right now, all the events are handled by the ACPI video
1114  		 * module. We don't actually need to do anything with them.
1115  		 */
1116  		opregion->acpi->csts = 0;
1117  		opregion->acpi->drdy = 1;
1118  	}
1119  
1120  	if (opregion->asle) {
1121  		opregion->asle->tche = ASLE_TCHE_BLC_EN;
1122  		opregion->asle->ardy = ASLE_ARDY_READY;
1123  	}
1124  
1125  	intel_opregion_notify_adapter(i915, PCI_D0);
1126  }
1127  
intel_opregion_suspend(struct drm_i915_private * i915,pci_power_t state)1128  void intel_opregion_suspend(struct drm_i915_private *i915, pci_power_t state)
1129  {
1130  	struct intel_opregion *opregion = &i915->opregion;
1131  
1132  	if (!opregion->header)
1133  		return;
1134  
1135  	intel_opregion_notify_adapter(i915, state);
1136  
1137  	if (opregion->asle)
1138  		opregion->asle->ardy = ASLE_ARDY_NOT_READY;
1139  
1140  	cancel_work_sync(&i915->opregion.asle_work);
1141  
1142  	if (opregion->acpi)
1143  		opregion->acpi->drdy = 0;
1144  }
1145  
intel_opregion_unregister(struct drm_i915_private * i915)1146  void intel_opregion_unregister(struct drm_i915_private *i915)
1147  {
1148  	struct intel_opregion *opregion = &i915->opregion;
1149  
1150  	intel_opregion_suspend(i915, PCI_D1);
1151  
1152  	if (!opregion->header)
1153  		return;
1154  
1155  	if (opregion->acpi_notifier.notifier_call) {
1156  		unregister_acpi_notifier(&opregion->acpi_notifier);
1157  		opregion->acpi_notifier.notifier_call = NULL;
1158  	}
1159  
1160  	/* just clear all opregion memory pointers now */
1161  	memunmap(opregion->header);
1162  	if (opregion->rvda) {
1163  		memunmap(opregion->rvda);
1164  		opregion->rvda = NULL;
1165  	}
1166  	if (opregion->vbt_firmware) {
1167  		kfree(opregion->vbt_firmware);
1168  		opregion->vbt_firmware = NULL;
1169  	}
1170  	opregion->header = NULL;
1171  	opregion->acpi = NULL;
1172  	opregion->swsci = NULL;
1173  	opregion->asle = NULL;
1174  	opregion->vbt = NULL;
1175  	opregion->lid_state = NULL;
1176  }
1177