[net-next-2.6.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 <acpi/video.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)

#define ACPI_OTHER_OUTPUT (0<<8)
#define ACPI_VGA_OUTPUT (1<<8)
#define ACPI_TV_OUTPUT (2<<8)
#define ACPI_DIGITAL_OUTPUT (3<<8)
#define ACPI_LVDS_OUTPUT (4<<8)

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,
};

/*
 * Initialise the DIDL field in opregion. This passes a list of devices to
 * the firmware. Values are defined by section B.4.2 of the ACPI specification
 * (version 3)
 */

static void intel_didl_outputs(struct drm_device *dev)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	struct intel_opregion *opregion = &dev_priv->opregion;
	struct drm_connector *connector;
	int i = 0;

	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
		int output_type = ACPI_OTHER_OUTPUT;
		if (i >= 8) {
			dev_printk (KERN_ERR, &dev->pdev->dev,
				    "More than 8 outputs detected\n");
			return;
		}
		switch (connector->connector_type) {
		case DRM_MODE_CONNECTOR_VGA:
		case DRM_MODE_CONNECTOR_DVIA:
			output_type = ACPI_VGA_OUTPUT;
			break;
		case DRM_MODE_CONNECTOR_Composite:
		case DRM_MODE_CONNECTOR_SVIDEO:
		case DRM_MODE_CONNECTOR_Component:
		case DRM_MODE_CONNECTOR_9PinDIN:
			output_type = ACPI_TV_OUTPUT;
			break;
		case DRM_MODE_CONNECTOR_DVII:
		case DRM_MODE_CONNECTOR_DVID:
		case DRM_MODE_CONNECTOR_DisplayPort:
		case DRM_MODE_CONNECTOR_HDMIA:
		case DRM_MODE_CONNECTOR_HDMIB:
			output_type = ACPI_DIGITAL_OUTPUT;
			break;
		case DRM_MODE_CONNECTOR_LVDS:
			output_type = ACPI_LVDS_OUTPUT;
			break;
		}
		opregion->acpi->didl[i] |= (1<<31) | output_type | i;
		i++;
	}

	/* If fewer than 8 outputs, the list must be null terminated */
	if (i < 8)
		opregion->acpi->didl[i] = 0;
}

int intel_opregion_init(struct drm_device *dev, int resume)
{
	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;
		if (drm_core_check_feature(dev, DRIVER_MODESET))
			intel_didl_outputs(dev);
	} 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;
	}

	if (!resume)
		acpi_video_register();


	/* 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>
74a365b3	29	#include <acpi/video.h>
8ee1c3db MG	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
74a365b3 MG	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
8ee1c3db MG	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) {
8ee1c3db	245	if (IS_MOBILE(dev)) {
7c463586 KP	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	}
8ee1c3db MG	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
b358d0a6 HE	267	static int intel_opregion_video_event(struct notifier_block *nb,
b358d0a6 HE	268	unsigned long val, void *data)
8ee1c3db MG	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
74a365b3 MG	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)
8ee1c3db MG	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;
d770e3cf	373	if (drm_core_check_feature(dev, DRIVER_MODESET))
74a365b3	374	intel_didl_outputs(dev);
8ee1c3db MG	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	}
	390
d770e3cf MG	391	if (!resume)
	392	acpi_video_register();
	393
	394
8ee1c3db MG	395	/* Notify BIOS we are ready to handle ACPI video ext notifs.
	396	* Right now, all the events are handled by the ACPI video module.
	397	* We don't actually need to do anything with them. */
	398	opregion->acpi->csts = 0;
	399	opregion->acpi->drdy = 1;
	400
	401	system_opregion = opregion;
	402	register_acpi_notifier(&intel_opregion_notifier);
	403
	404	return 0;
	405
	406	err_out:
	407	iounmap(opregion->header);
	408	opregion->header = NULL;
	409	return err;
	410	}
	411
	412	void intel_opregion_free(struct drm_device *dev)
	413	{
	414	struct drm_i915_private *dev_priv = dev->dev_private;
	415	struct intel_opregion *opregion = &dev_priv->opregion;
	416
	417	if (!opregion->enabled)
	418	return;
	419
	420	opregion->acpi->drdy = 0;
	421
	422	system_opregion = NULL;
	423	unregister_acpi_notifier(&intel_opregion_notifier);
	424
	425	/* just clear all opregion memory pointers now */
	426	iounmap(opregion->header);
	427	opregion->header = NULL;
	428	opregion->acpi = NULL;
	429	opregion->swsci = NULL;
	430	opregion->asle = NULL;
	431
	432	opregion->enabled = 0;
	433	}