[deliverable/linux.git] / drivers / gpu / drm / i915 / i915_opregion.c

/*
 * Copyright 2008 Intel Corporation <hong.liu@intel.com>
 * Copyright 2008 Red Hat <mjg@redhat.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial
 * portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NON-INFRINGEMENT.  IN NO EVENT SHALL INTEL AND/OR ITS SUPPLIERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 */

#include <linux/acpi.h>

#include "drmP.h"
#include "i915_drm.h"
#include "i915_drv.h"

#define PCI_ASLE 0xe4
#define PCI_LBPC 0xf4
#define PCI_ASLS 0xfc

#define OPREGION_SZ            (8*1024)
#define OPREGION_HEADER_OFFSET 0
#define OPREGION_ACPI_OFFSET   0x100
#define OPREGION_SWSCI_OFFSET  0x200
#define OPREGION_ASLE_OFFSET   0x300
#define OPREGION_VBT_OFFSET    0x1000

#define OPREGION_SIGNATURE "IntelGraphicsMem"
#define MBOX_ACPI      (1<<0)
#define MBOX_SWSCI     (1<<1)
#define MBOX_ASLE      (1<<2)

struct opregion_header {
       u8 signature[16];
       u32 size;
       u32 opregion_ver;
       u8 bios_ver[32];
       u8 vbios_ver[16];
       u8 driver_ver[16];
       u32 mboxes;
       u8 reserved[164];
} __attribute__((packed));

/* OpRegion mailbox #1: public ACPI methods */
struct opregion_acpi {
       u32 drdy;       /* driver readiness */
       u32 csts;       /* notification status */
       u32 cevt;       /* current event */
       u8 rsvd1[20];
       u32 didl[8];    /* supported display devices ID list */
       u32 cpdl[8];    /* currently presented display list */
       u32 cadl[8];    /* currently active display list */
       u32 nadl[8];    /* next active devices list */
       u32 aslp;       /* ASL sleep time-out */
       u32 tidx;       /* toggle table index */
       u32 chpd;       /* current hotplug enable indicator */
       u32 clid;       /* current lid state*/
       u32 cdck;       /* current docking state */
       u32 sxsw;       /* Sx state resume */
       u32 evts;       /* ASL supported events */
       u32 cnot;       /* current OS notification */
       u32 nrdy;       /* driver status */
       u8 rsvd2[60];
} __attribute__((packed));

/* OpRegion mailbox #2: SWSCI */
struct opregion_swsci {
       u32 scic;       /* SWSCI command|status|data */
       u32 parm;       /* command parameters */
       u32 dslp;       /* driver sleep time-out */
       u8 rsvd[244];
} __attribute__((packed));

/* OpRegion mailbox #3: ASLE */
struct opregion_asle {
       u32 ardy;       /* driver readiness */
       u32 aslc;       /* ASLE interrupt command */
       u32 tche;       /* technology enabled indicator */
       u32 alsi;       /* current ALS illuminance reading */
       u32 bclp;       /* backlight brightness to set */
       u32 pfit;       /* panel fitting state */
       u32 cblv;       /* current brightness level */
       u16 bclm[20];   /* backlight level duty cycle mapping table */
       u32 cpfm;       /* current panel fitting mode */
       u32 epfm;       /* enabled panel fitting modes */
       u8 plut[74];    /* panel LUT and identifier */
       u32 pfmb;       /* PWM freq and min brightness */
       u8 rsvd[102];
} __attribute__((packed));

/* ASLE irq request bits */
#define ASLE_SET_ALS_ILLUM     (1 << 0)
#define ASLE_SET_BACKLIGHT     (1 << 1)
#define ASLE_SET_PFIT          (1 << 2)
#define ASLE_SET_PWM_FREQ      (1 << 3)
#define ASLE_REQ_MSK           0xf

/* response bits of ASLE irq request */
#define ASLE_ALS_ILLUM_FAIL    (2<<10)
#define ASLE_BACKLIGHT_FAIL    (2<<12)
#define ASLE_PFIT_FAIL         (2<<14)
#define ASLE_PWM_FREQ_FAIL     (2<<16)

/* ASLE backlight brightness to set */
#define ASLE_BCLP_VALID                (1<<31)
#define ASLE_BCLP_MSK          (~(1<<31))

/* ASLE panel fitting request */
#define ASLE_PFIT_VALID         (1<<31)
#define ASLE_PFIT_CENTER (1<<0)
#define ASLE_PFIT_STRETCH_TEXT (1<<1)
#define ASLE_PFIT_STRETCH_GFX (1<<2)

/* PWM frequency and minimum brightness */
#define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
#define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
#define ASLE_PFMB_PWM_MASK (0x7ffffe00)
#define ASLE_PFMB_PWM_VALID (1<<31)

#define ASLE_CBLV_VALID         (1<<31)

static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	struct opregion_asle *asle = dev_priv->opregion.asle;
	u32 blc_pwm_ctl, blc_pwm_ctl2;

	if (!(bclp & ASLE_BCLP_VALID))
		return ASLE_BACKLIGHT_FAIL;

	bclp &= ASLE_BCLP_MSK;
	if (bclp < 0 || bclp > 255)
		return ASLE_BACKLIGHT_FAIL;

	blc_pwm_ctl = I915_READ(BLC_PWM_CTL);
	blc_pwm_ctl &= ~BACKLIGHT_DUTY_CYCLE_MASK;
	blc_pwm_ctl2 = I915_READ(BLC_PWM_CTL2);

	if (blc_pwm_ctl2 & BLM_COMBINATION_MODE)
		pci_write_config_dword(dev->pdev, PCI_LBPC, bclp);
	else
		I915_WRITE(BLC_PWM_CTL, blc_pwm_ctl | ((bclp * 0x101)-1));

	asle->cblv = (bclp*0x64)/0xff | ASLE_CBLV_VALID;

	return 0;
}

static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
{
	/* alsi is the current ALS reading in lux. 0 indicates below sensor
	   range, 0xffff indicates above sensor range. 1-0xfffe are valid */
	return 0;
}

static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	if (pfmb & ASLE_PFMB_PWM_VALID) {
		u32 blc_pwm_ctl = I915_READ(BLC_PWM_CTL);
		u32 pwm = pfmb & ASLE_PFMB_PWM_MASK;
		blc_pwm_ctl &= BACKLIGHT_DUTY_CYCLE_MASK;
		pwm = pwm >> 9;
		/* FIXME - what do we do with the PWM? */
	}
	return 0;
}

static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
{
	/* Panel fitting is currently controlled by the X code, so this is a
	   noop until modesetting support works fully */
	if (!(pfit & ASLE_PFIT_VALID))
		return ASLE_PFIT_FAIL;
	return 0;
}

void opregion_asle_intr(struct drm_device *dev)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	struct opregion_asle *asle = dev_priv->opregion.asle;
	u32 asle_stat = 0;
	u32 asle_req;

	if (!asle)
		return;

	asle_req = asle->aslc & ASLE_REQ_MSK;

	if (!asle_req) {
		DRM_DEBUG("non asle set request??\n");
		return;
	}

	if (asle_req & ASLE_SET_ALS_ILLUM)
		asle_stat |= asle_set_als_illum(dev, asle->alsi);

	if (asle_req & ASLE_SET_BACKLIGHT)
		asle_stat |= asle_set_backlight(dev, asle->bclp);

	if (asle_req & ASLE_SET_PFIT)
		asle_stat |= asle_set_pfit(dev, asle->pfit);

	if (asle_req & ASLE_SET_PWM_FREQ)
		asle_stat |= asle_set_pwm_freq(dev, asle->pfmb);

	asle->aslc = asle_stat;
}

#define ASLE_ALS_EN    (1<<0)
#define ASLE_BLC_EN    (1<<1)
#define ASLE_PFIT_EN   (1<<2)
#define ASLE_PFMB_EN   (1<<3)

void opregion_enable_asle(struct drm_device *dev)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	struct opregion_asle *asle = dev_priv->opregion.asle;

	if (asle) {
		if (IS_MOBILE(dev)) {
			unsigned long irqflags;

			spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags);
			i915_enable_pipestat(dev_priv, 1,
					     I915_LEGACY_BLC_EVENT_ENABLE);
			spin_unlock_irqrestore(&dev_priv->user_irq_lock,
					       irqflags);
		}

		asle->tche = ASLE_ALS_EN | ASLE_BLC_EN | ASLE_PFIT_EN |
			ASLE_PFMB_EN;
		asle->ardy = 1;
	}
}

#define ACPI_EV_DISPLAY_SWITCH (1<<0)
#define ACPI_EV_LID            (1<<1)
#define ACPI_EV_DOCK           (1<<2)

static struct intel_opregion *system_opregion;

static int intel_opregion_video_event(struct notifier_block *nb,
				      unsigned long val, void *data)
{
	/* The only video events relevant to opregion are 0x80. These indicate
	   either a docking event, lid switch or display switch request. In
	   Linux, these are handled by the dock, button and video drivers.
	   We might want to fix the video driver to be opregion-aware in
	   future, but right now we just indicate to the firmware that the
	   request has been handled */

	struct opregion_acpi *acpi;

	if (!system_opregion)
		return NOTIFY_DONE;

	acpi = system_opregion->acpi;
	acpi->csts = 0;

	return NOTIFY_OK;
}

static struct notifier_block intel_opregion_notifier = {
	.notifier_call = intel_opregion_video_event,
};

int intel_opregion_init(struct drm_device *dev)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	struct intel_opregion *opregion = &dev_priv->opregion;
	void *base;
	u32 asls, mboxes;
	int err = 0;

	pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
	DRM_DEBUG("graphic opregion physical addr: 0x%x\n", asls);
	if (asls == 0) {
		DRM_DEBUG("ACPI OpRegion not supported!\n");
		return -ENOTSUPP;
	}

	base = ioremap(asls, OPREGION_SZ);
	if (!base)
		return -ENOMEM;

	opregion->header = base;
	if (memcmp(opregion->header->signature, OPREGION_SIGNATURE, 16)) {
		DRM_DEBUG("opregion signature mismatch\n");
		err = -EINVAL;
		goto err_out;
	}

	mboxes = opregion->header->mboxes;
	if (mboxes & MBOX_ACPI) {
		DRM_DEBUG("Public ACPI methods supported\n");
		opregion->acpi = base + OPREGION_ACPI_OFFSET;
	} else {
		DRM_DEBUG("Public ACPI methods not supported\n");
		err = -ENOTSUPP;
		goto err_out;
	}
	opregion->enabled = 1;

	if (mboxes & MBOX_SWSCI) {
		DRM_DEBUG("SWSCI supported\n");
		opregion->swsci = base + OPREGION_SWSCI_OFFSET;
	}
	if (mboxes & MBOX_ASLE) {
		DRM_DEBUG("ASLE supported\n");
		opregion->asle = base + OPREGION_ASLE_OFFSET;
	}

	/* Notify BIOS we are ready to handle ACPI video ext notifs.
	 * Right now, all the events are handled by the ACPI video module.
	 * We don't actually need to do anything with them. */
	opregion->acpi->csts = 0;
	opregion->acpi->drdy = 1;

	system_opregion = opregion;
	register_acpi_notifier(&intel_opregion_notifier);

	return 0;

err_out:
	iounmap(opregion->header);
	opregion->header = NULL;
	return err;
}

void intel_opregion_free(struct drm_device *dev)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	struct intel_opregion *opregion = &dev_priv->opregion;

	if (!opregion->enabled)
		return;

	opregion->acpi->drdy = 0;

	system_opregion = NULL;
	unregister_acpi_notifier(&intel_opregion_notifier);

	/* just clear all opregion memory pointers now */
	iounmap(opregion->header);
	opregion->header = NULL;
	opregion->acpi = NULL;
	opregion->swsci = NULL;
	opregion->asle = NULL;

	opregion->enabled = 0;
}
Commit	Line	Data
8ee1c3db MG	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
b358d0a6 HE	260	static int intel_opregion_video_event(struct notifier_block *nb,
b358d0a6 HE	261	unsigned long val, void *data)
8ee1c3db MG	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	}