[linux-2.6-block.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;
	u32 max_backlight, level, shift;

	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_ctl2 = I915_READ(BLC_PWM_CTL2);

	if (IS_I965G(dev) && (blc_pwm_ctl2 & BLM_COMBINATION_MODE))
		pci_write_config_dword(dev->pdev, PCI_LBPC, bclp);
	else {
		if (IS_IGD(dev)) {
			blc_pwm_ctl &= ~(BACKLIGHT_DUTY_CYCLE_MASK - 1);
			max_backlight = (blc_pwm_ctl & BACKLIGHT_MODULATION_FREQ_MASK) >> 
					BACKLIGHT_MODULATION_FREQ_SHIFT;
			shift = BACKLIGHT_DUTY_CYCLE_SHIFT + 1;
		} else {
			blc_pwm_ctl &= ~BACKLIGHT_DUTY_CYCLE_MASK;
			max_backlight = ((blc_pwm_ctl & BACKLIGHT_MODULATION_FREQ_MASK) >> 
					BACKLIGHT_MODULATION_FREQ_SHIFT) * 2;
			shift = BACKLIGHT_DUTY_CYCLE_SHIFT;
		}
		level = (bclp * max_backlight) / 255;
		I915_WRITE(BLC_PWM_CTL, blc_pwm_ctl | (level << shift));
	}
	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;
		opregion_enable_asle(dev);
	}

	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, int suspend)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	struct intel_opregion *opregion = &dev_priv->opregion;

	if (!opregion->enabled)
		return;

	if (!suspend)
		acpi_video_unregister();

	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;
078a033f	151	u32 max_backlight, level, shift;
8ee1c3db MG	152
	153	if (!(bclp & ASLE_BCLP_VALID))
	154	return ASLE_BACKLIGHT_FAIL;
	155
	156	bclp &= ASLE_BCLP_MSK;
	157	if (bclp < 0 \|\| bclp > 255)
	158	return ASLE_BACKLIGHT_FAIL;
	159
	160	blc_pwm_ctl = I915_READ(BLC_PWM_CTL);
8ee1c3db MG	161	blc_pwm_ctl2 = I915_READ(BLC_PWM_CTL2);
8ee1c3db MG	162
078a033f	163	if (IS_I965G(dev) && (blc_pwm_ctl2 & BLM_COMBINATION_MODE))
8ee1c3db	164	pci_write_config_dword(dev->pdev, PCI_LBPC, bclp);
078a033f LP	165	else {
	166	if (IS_IGD(dev)) {
	167	blc_pwm_ctl &= ~(BACKLIGHT_DUTY_CYCLE_MASK - 1);
	168	max_backlight = (blc_pwm_ctl & BACKLIGHT_MODULATION_FREQ_MASK) >>
	169	BACKLIGHT_MODULATION_FREQ_SHIFT;
	170	shift = BACKLIGHT_DUTY_CYCLE_SHIFT + 1;
	171	} else {
	172	blc_pwm_ctl &= ~BACKLIGHT_DUTY_CYCLE_MASK;
	173	max_backlight = ((blc_pwm_ctl & BACKLIGHT_MODULATION_FREQ_MASK) >>
	174	BACKLIGHT_MODULATION_FREQ_SHIFT) * 2;
	175	shift = BACKLIGHT_DUTY_CYCLE_SHIFT;
	176	}
	177	level = (bclp * max_backlight) / 255;
	178	I915_WRITE(BLC_PWM_CTL, blc_pwm_ctl \| (level << shift));
	179	}
8ee1c3db MG	180	asle->cblv = (bclp*0x64)/0xff \| ASLE_CBLV_VALID;
	181
	182	return 0;
	183	}
	184
	185	static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
	186	{
	187	/* alsi is the current ALS reading in lux. 0 indicates below sensor
	188	range, 0xffff indicates above sensor range. 1-0xfffe are valid */
	189	return 0;
	190	}
	191
	192	static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
	193	{
	194	struct drm_i915_private *dev_priv = dev->dev_private;
	195	if (pfmb & ASLE_PFMB_PWM_VALID) {
	196	u32 blc_pwm_ctl = I915_READ(BLC_PWM_CTL);
	197	u32 pwm = pfmb & ASLE_PFMB_PWM_MASK;
	198	blc_pwm_ctl &= BACKLIGHT_DUTY_CYCLE_MASK;
	199	pwm = pwm >> 9;
	200	/* FIXME - what do we do with the PWM? */
	201	}
	202	return 0;
	203	}
	204
	205	static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
	206	{
	207	/* Panel fitting is currently controlled by the X code, so this is a
	208	noop until modesetting support works fully */
	209	if (!(pfit & ASLE_PFIT_VALID))
	210	return ASLE_PFIT_FAIL;
	211	return 0;
	212	}
	213
	214	void opregion_asle_intr(struct drm_device *dev)
	215	{
	216	struct drm_i915_private *dev_priv = dev->dev_private;
	217	struct opregion_asle *asle = dev_priv->opregion.asle;
	218	u32 asle_stat = 0;
	219	u32 asle_req;
	220
	221	if (!asle)
	222	return;
	223
	224	asle_req = asle->aslc & ASLE_REQ_MSK;
	225
	226	if (!asle_req) {
	227	DRM_DEBUG("non asle set request??\n");
	228	return;
	229	}
	230
	231	if (asle_req & ASLE_SET_ALS_ILLUM)
	232	asle_stat \|= asle_set_als_illum(dev, asle->alsi);
	233
	234	if (asle_req & ASLE_SET_BACKLIGHT)
	235	asle_stat \|= asle_set_backlight(dev, asle->bclp);
	236
	237	if (asle_req & ASLE_SET_PFIT)
	238	asle_stat \|= asle_set_pfit(dev, asle->pfit);
	239
	240	if (asle_req & ASLE_SET_PWM_FREQ)
	241	asle_stat \|= asle_set_pwm_freq(dev, asle->pfmb);
	242
	243	asle->aslc = asle_stat;
244	}
245
246	#define ASLE_ALS_EN (1<<0)
247	#define ASLE_BLC_EN (1<<1)
248	#define ASLE_PFIT_EN (1<<2)
249	#define ASLE_PFMB_EN (1<<3)
250
251	void opregion_enable_asle(struct drm_device *dev)
252	{
253	struct drm_i915_private *dev_priv = dev->dev_private;
254	struct opregion_asle *asle = dev_priv->opregion.asle;
255
256	if (asle) {
8ee1c3db	257	if (IS_MOBILE(dev)) {
7c463586 KP	258	unsigned long irqflags;
	259
	260	spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags);
	261	i915_enable_pipestat(dev_priv, 1,
	262	I915_LEGACY_BLC_EVENT_ENABLE);
	263	spin_unlock_irqrestore(&dev_priv->user_irq_lock,
	264	irqflags);
	265	}
8ee1c3db MG	266
	267	asle->tche = ASLE_ALS_EN \| ASLE_BLC_EN \| ASLE_PFIT_EN \|
	268	ASLE_PFMB_EN;
	269	asle->ardy = 1;
	270	}
	271	}
	272
	273	#define ACPI_EV_DISPLAY_SWITCH (1<<0)
	274	#define ACPI_EV_LID (1<<1)
	275	#define ACPI_EV_DOCK (1<<2)
	276
	277	static struct intel_opregion *system_opregion;
	278
b358d0a6 HE	279	static int intel_opregion_video_event(struct notifier_block *nb,
b358d0a6 HE	280	unsigned long val, void *data)
8ee1c3db MG	281	{
	282	/* The only video events relevant to opregion are 0x80. These indicate
	283	either a docking event, lid switch or display switch request. In
	284	Linux, these are handled by the dock, button and video drivers.
	285	We might want to fix the video driver to be opregion-aware in
	286	future, but right now we just indicate to the firmware that the
	287	request has been handled */
	288
	289	struct opregion_acpi *acpi;
	290
	291	if (!system_opregion)
	292	return NOTIFY_DONE;
	293
	294	acpi = system_opregion->acpi;
	295	acpi->csts = 0;
	296
	297	return NOTIFY_OK;
	298	}
	299
	300	static struct notifier_block intel_opregion_notifier = {
	301	.notifier_call = intel_opregion_video_event,
	302	};
	303
74a365b3 MG	304	/*
	305	* Initialise the DIDL field in opregion. This passes a list of devices to
	306	* the firmware. Values are defined by section B.4.2 of the ACPI specification
	307	* (version 3)
	308	*/
	309
	310	static void intel_didl_outputs(struct drm_device *dev)
	311	{
	312	struct drm_i915_private *dev_priv = dev->dev_private;
	313	struct intel_opregion *opregion = &dev_priv->opregion;
	314	struct drm_connector *connector;
	315	int i = 0;
	316
	317	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
	318	int output_type = ACPI_OTHER_OUTPUT;
	319	if (i >= 8) {
	320	dev_printk (KERN_ERR, &dev->pdev->dev,
	321	"More than 8 outputs detected\n");
	322	return;
	323	}
	324	switch (connector->connector_type) {
	325	case DRM_MODE_CONNECTOR_VGA:
	326	case DRM_MODE_CONNECTOR_DVIA:
	327	output_type = ACPI_VGA_OUTPUT;
	328	break;
	329	case DRM_MODE_CONNECTOR_Composite:
	330	case DRM_MODE_CONNECTOR_SVIDEO:
	331	case DRM_MODE_CONNECTOR_Component:
	332	case DRM_MODE_CONNECTOR_9PinDIN:
	333	output_type = ACPI_TV_OUTPUT;
	334	break;
	335	case DRM_MODE_CONNECTOR_DVII:
	336	case DRM_MODE_CONNECTOR_DVID:
	337	case DRM_MODE_CONNECTOR_DisplayPort:
	338	case DRM_MODE_CONNECTOR_HDMIA:
	339	case DRM_MODE_CONNECTOR_HDMIB:
	340	output_type = ACPI_DIGITAL_OUTPUT;
	341	break;
	342	case DRM_MODE_CONNECTOR_LVDS:
	343	output_type = ACPI_LVDS_OUTPUT;
	344	break;
	345	}
	346	opregion->acpi->didl[i] \|= (1<<31) \| output_type \| i;
	347	i++;
	348	}
	349
	350	/* If fewer than 8 outputs, the list must be null terminated */
	351	if (i < 8)
	352	opregion->acpi->didl[i] = 0;
	353	}
	354
	355	int intel_opregion_init(struct drm_device *dev, int resume)
8ee1c3db MG	356	{
	357	struct drm_i915_private *dev_priv = dev->dev_private;
	358	struct intel_opregion *opregion = &dev_priv->opregion;
	359	void *base;
	360	u32 asls, mboxes;
	361	int err = 0;
	362
	363	pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
	364	DRM_DEBUG("graphic opregion physical addr: 0x%x\n", asls);
	365	if (asls == 0) {
	366	DRM_DEBUG("ACPI OpRegion not supported!\n");
	367	return -ENOTSUPP;
	368	}
	369
	370	base = ioremap(asls, OPREGION_SZ);
	371	if (!base)
	372	return -ENOMEM;
	373
	374	opregion->header = base;
	375	if (memcmp(opregion->header->signature, OPREGION_SIGNATURE, 16)) {
	376	DRM_DEBUG("opregion signature mismatch\n");
	377	err = -EINVAL;
	378	goto err_out;
	379	}
	380
	381	mboxes = opregion->header->mboxes;
	382	if (mboxes & MBOX_ACPI) {
	383	DRM_DEBUG("Public ACPI methods supported\n");
	384	opregion->acpi = base + OPREGION_ACPI_OFFSET;
d770e3cf	385	if (drm_core_check_feature(dev, DRIVER_MODESET))
74a365b3	386	intel_didl_outputs(dev);
8ee1c3db MG	387	} else {
	388	DRM_DEBUG("Public ACPI methods not supported\n");
	389	err = -ENOTSUPP;
	390	goto err_out;
	391	}
	392	opregion->enabled = 1;
	393
	394	if (mboxes & MBOX_SWSCI) {
	395	DRM_DEBUG("SWSCI supported\n");
	396	opregion->swsci = base + OPREGION_SWSCI_OFFSET;
	397	}
	398	if (mboxes & MBOX_ASLE) {
	399	DRM_DEBUG("ASLE supported\n");
	400	opregion->asle = base + OPREGION_ASLE_OFFSET;
44ab4315	401	opregion_enable_asle(dev);
8ee1c3db MG	402	}
8ee1c3db MG	403
d770e3cf MG	404	if (!resume)
	405	acpi_video_register();
	406
	407
8ee1c3db MG	408	/* Notify BIOS we are ready to handle ACPI video ext notifs.
	409	* Right now, all the events are handled by the ACPI video module.
	410	* We don't actually need to do anything with them. */
	411	opregion->acpi->csts = 0;
	412	opregion->acpi->drdy = 1;
	413
	414	system_opregion = opregion;
	415	register_acpi_notifier(&intel_opregion_notifier);
	416
	417	return 0;
	418
	419	err_out:
	420	iounmap(opregion->header);
	421	opregion->header = NULL;
	422	return err;
	423	}
	424
3b1c1c11	425	void intel_opregion_free(struct drm_device *dev, int suspend)
8ee1c3db MG	426	{
	427	struct drm_i915_private *dev_priv = dev->dev_private;
	428	struct intel_opregion *opregion = &dev_priv->opregion;
	429
	430	if (!opregion->enabled)
	431	return;
	432
3b1c1c11	433	if (!suspend)
86e437f0	434	acpi_video_unregister();
3b1c1c11	435
8ee1c3db MG	436	opregion->acpi->drdy = 0;
	437
	438	system_opregion = NULL;
	439	unregister_acpi_notifier(&intel_opregion_notifier);
	440
	441	/* just clear all opregion memory pointers now */
	442	iounmap(opregion->header);
	443	opregion->header = NULL;
	444	opregion->acpi = NULL;
	445	opregion->swsci = NULL;
	446	opregion->asle = NULL;
	447
	448	opregion->enabled = 0;
	449	}