[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)
#define ASLE_ALS_ILLUM_FAILED	(1<<10)
#define ASLE_BACKLIGHT_FAILED	(1<<12)
#define ASLE_PFIT_FAILED	(1<<14)
#define ASLE_PWM_FREQ_FAILED	(1<<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_PINEVIEW(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_DRIVER("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;
}

static u32 asle_set_backlight_ironlake(struct drm_device *dev, u32 bclp)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	struct opregion_asle *asle = dev_priv->opregion.asle;
	u32 cpu_pwm_ctl, pch_pwm_ctl2;
	u32 max_backlight, level;

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

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

	cpu_pwm_ctl = I915_READ(BLC_PWM_CPU_CTL);
	pch_pwm_ctl2 = I915_READ(BLC_PWM_PCH_CTL2);
	/* get the max PWM frequency */
	max_backlight = (pch_pwm_ctl2 >> 16) & BACKLIGHT_DUTY_CYCLE_MASK;
	/* calculate the expected PMW frequency */
	level = (bclp * max_backlight) / 255;
	/* reserve the high 16 bits */
	cpu_pwm_ctl &= ~(BACKLIGHT_DUTY_CYCLE_MASK);
	/* write the updated PWM frequency */
	I915_WRITE(BLC_PWM_CPU_CTL, cpu_pwm_ctl | level);

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

	return 0;
}

void ironlake_opregion_gse_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_DRIVER("non asle set request??\n");
		return;
	}

	if (asle_req & ASLE_SET_ALS_ILLUM) {
		DRM_DEBUG_DRIVER("Illum is not supported\n");
		asle_stat |= ASLE_ALS_ILLUM_FAILED;
	}

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

	if (asle_req & ASLE_SET_PFIT) {
		DRM_DEBUG_DRIVER("Pfit is not supported\n");
		asle_stat |= ASLE_PFIT_FAILED;
	}

	if (asle_req & ASLE_SET_PWM_FREQ) {
		DRM_DEBUG_DRIVER("PWM freq is not supported\n");
		asle_stat |= ASLE_PWM_FREQ_FAILED;
	}

	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);
			intel_enable_asle(dev);
			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;
	acpi_handle handle;
	struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL;
	unsigned long long device_id;
	acpi_status status;
	int i = 0;

	handle = DEVICE_ACPI_HANDLE(&dev->pdev->dev);
	if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &acpi_dev)))
		return;

	if (acpi_is_video_device(acpi_dev))
		acpi_video_bus = acpi_dev;
	else {
		list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
			if (acpi_is_video_device(acpi_cdev)) {
				acpi_video_bus = acpi_cdev;
				break;
			}
		}
	}

	if (!acpi_video_bus) {
		printk(KERN_WARNING "No ACPI video bus found\n");
		return;
	}

	list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
		if (i >= 8) {
			dev_printk (KERN_ERR, &dev->pdev->dev,
				    "More than 8 outputs detected\n");
			return;
		}
		status =
			acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
						NULL, &device_id);
		if (ACPI_SUCCESS(status)) {
			if (!device_id)
				goto blind_set;
			opregion->acpi->didl[i] = (u32)(device_id & 0x0f0f);
			i++;
		}
	}

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

blind_set:
	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++;
	}
	goto end;
}

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_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
	if (asls == 0) {
		DRM_DEBUG_DRIVER("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_DRIVER("opregion signature mismatch\n");
		err = -EINVAL;
		goto err_out;
	}

	mboxes = opregion->header->mboxes;
	if (mboxes & MBOX_ACPI) {
		DRM_DEBUG_DRIVER("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_DRIVER("Public ACPI methods not supported\n");
		err = -ENOTSUPP;
		goto err_out;
	}
	opregion->enabled = 1;

	if (mboxes & MBOX_SWSCI) {
		DRM_DEBUG_DRIVER("SWSCI supported\n");
		opregion->swsci = base + OPREGION_SWSCI_OFFSET;
	}
	if (mboxes & MBOX_ASLE) {
		DRM_DEBUG_DRIVER("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;
	acpi_video_register();
	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)
01c66889 ZY	121	#define ASLE_ALS_ILLUM_FAILED (1<<10)
	122	#define ASLE_BACKLIGHT_FAILED (1<<12)
	123	#define ASLE_PFIT_FAILED (1<<14)
	124	#define ASLE_PWM_FREQ_FAILED (1<<16)
8ee1c3db MG	125
	126	/* ASLE backlight brightness to set */
	127	#define ASLE_BCLP_VALID (1<<31)
	128	#define ASLE_BCLP_MSK (~(1<<31))
	129
	130	/* ASLE panel fitting request */
	131	#define ASLE_PFIT_VALID (1<<31)
	132	#define ASLE_PFIT_CENTER (1<<0)
	133	#define ASLE_PFIT_STRETCH_TEXT (1<<1)
	134	#define ASLE_PFIT_STRETCH_GFX (1<<2)
	135
	136	/* PWM frequency and minimum brightness */
	137	#define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
	138	#define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
	139	#define ASLE_PFMB_PWM_MASK (0x7ffffe00)
	140	#define ASLE_PFMB_PWM_VALID (1<<31)
	141
	142	#define ASLE_CBLV_VALID (1<<31)
	143
74a365b3 MG	144	#define ACPI_OTHER_OUTPUT (0<<8)
	145	#define ACPI_VGA_OUTPUT (1<<8)
	146	#define ACPI_TV_OUTPUT (2<<8)
	147	#define ACPI_DIGITAL_OUTPUT (3<<8)
	148	#define ACPI_LVDS_OUTPUT (4<<8)
	149
8ee1c3db MG	150	static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
	151	{
	152	struct drm_i915_private *dev_priv = dev->dev_private;
	153	struct opregion_asle *asle = dev_priv->opregion.asle;
	154	u32 blc_pwm_ctl, blc_pwm_ctl2;
078a033f	155	u32 max_backlight, level, shift;
8ee1c3db MG	156
	157	if (!(bclp & ASLE_BCLP_VALID))
	158	return ASLE_BACKLIGHT_FAIL;
	159
	160	bclp &= ASLE_BCLP_MSK;
	161	if (bclp < 0 \|\| bclp > 255)
	162	return ASLE_BACKLIGHT_FAIL;
	163
	164	blc_pwm_ctl = I915_READ(BLC_PWM_CTL);
8ee1c3db MG	165	blc_pwm_ctl2 = I915_READ(BLC_PWM_CTL2);
8ee1c3db MG	166
078a033f	167	if (IS_I965G(dev) && (blc_pwm_ctl2 & BLM_COMBINATION_MODE))
8ee1c3db	168	pci_write_config_dword(dev->pdev, PCI_LBPC, bclp);
078a033f	169	else {
f2b115e6	170	if (IS_PINEVIEW(dev)) {
078a033f LP	171	blc_pwm_ctl &= ~(BACKLIGHT_DUTY_CYCLE_MASK - 1);
	172	max_backlight = (blc_pwm_ctl & BACKLIGHT_MODULATION_FREQ_MASK) >>
	173	BACKLIGHT_MODULATION_FREQ_SHIFT;
	174	shift = BACKLIGHT_DUTY_CYCLE_SHIFT + 1;
	175	} else {
	176	blc_pwm_ctl &= ~BACKLIGHT_DUTY_CYCLE_MASK;
	177	max_backlight = ((blc_pwm_ctl & BACKLIGHT_MODULATION_FREQ_MASK) >>
	178	BACKLIGHT_MODULATION_FREQ_SHIFT) * 2;
	179	shift = BACKLIGHT_DUTY_CYCLE_SHIFT;
	180	}
	181	level = (bclp * max_backlight) / 255;
	182	I915_WRITE(BLC_PWM_CTL, blc_pwm_ctl \| (level << shift));
	183	}
8ee1c3db MG	184	asle->cblv = (bclp*0x64)/0xff \| ASLE_CBLV_VALID;
	185
	186	return 0;
	187	}
	188
	189	static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
	190	{
	191	/* alsi is the current ALS reading in lux. 0 indicates below sensor
	192	range, 0xffff indicates above sensor range. 1-0xfffe are valid */
	193	return 0;
	194	}
	195
	196	static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
	197	{
	198	struct drm_i915_private *dev_priv = dev->dev_private;
	199	if (pfmb & ASLE_PFMB_PWM_VALID) {
	200	u32 blc_pwm_ctl = I915_READ(BLC_PWM_CTL);
	201	u32 pwm = pfmb & ASLE_PFMB_PWM_MASK;
	202	blc_pwm_ctl &= BACKLIGHT_DUTY_CYCLE_MASK;
	203	pwm = pwm >> 9;
	204	/* FIXME - what do we do with the PWM? */
	205	}
	206	return 0;
	207	}
	208
	209	static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
	210	{
	211	/* Panel fitting is currently controlled by the X code, so this is a
	212	noop until modesetting support works fully */
	213	if (!(pfit & ASLE_PFIT_VALID))
	214	return ASLE_PFIT_FAIL;
	215	return 0;
	216	}
	217
	218	void opregion_asle_intr(struct drm_device *dev)
	219	{
	220	struct drm_i915_private *dev_priv = dev->dev_private;
	221	struct opregion_asle *asle = dev_priv->opregion.asle;
	222	u32 asle_stat = 0;
	223	u32 asle_req;
	224
	225	if (!asle)
	226	return;
	227
	228	asle_req = asle->aslc & ASLE_REQ_MSK;
	229
	230	if (!asle_req) {
44d98a61	231	DRM_DEBUG_DRIVER("non asle set request??\n");
8ee1c3db MG	232	return;
	233	}
	234
	235	if (asle_req & ASLE_SET_ALS_ILLUM)
	236	asle_stat \|= asle_set_als_illum(dev, asle->alsi);
	237
	238	if (asle_req & ASLE_SET_BACKLIGHT)
	239	asle_stat \|= asle_set_backlight(dev, asle->bclp);
	240
	241	if (asle_req & ASLE_SET_PFIT)
	242	asle_stat \|= asle_set_pfit(dev, asle->pfit);
	243
	244	if (asle_req & ASLE_SET_PWM_FREQ)
	245	asle_stat \|= asle_set_pwm_freq(dev, asle->pfmb);
	246
	247	asle->aslc = asle_stat;
	248	}
	249
01c66889 ZY	250	static u32 asle_set_backlight_ironlake(struct drm_device *dev, u32 bclp)
	251	{
	252	struct drm_i915_private *dev_priv = dev->dev_private;
	253	struct opregion_asle *asle = dev_priv->opregion.asle;
	254	u32 cpu_pwm_ctl, pch_pwm_ctl2;
	255	u32 max_backlight, level;
	256
	257	if (!(bclp & ASLE_BCLP_VALID))
	258	return ASLE_BACKLIGHT_FAILED;
	259
	260	bclp &= ASLE_BCLP_MSK;
	261	if (bclp < 0 \|\| bclp > 255)
	262	return ASLE_BACKLIGHT_FAILED;
	263
	264	cpu_pwm_ctl = I915_READ(BLC_PWM_CPU_CTL);
	265	pch_pwm_ctl2 = I915_READ(BLC_PWM_PCH_CTL2);
	266	/* get the max PWM frequency */
	267	max_backlight = (pch_pwm_ctl2 >> 16) & BACKLIGHT_DUTY_CYCLE_MASK;
	268	/* calculate the expected PMW frequency */
	269	level = (bclp * max_backlight) / 255;
	270	/* reserve the high 16 bits */
	271	cpu_pwm_ctl &= ~(BACKLIGHT_DUTY_CYCLE_MASK);
	272	/* write the updated PWM frequency */
	273	I915_WRITE(BLC_PWM_CPU_CTL, cpu_pwm_ctl \| level);
	274
	275	asle->cblv = (bclp*0x64)/0xff \| ASLE_CBLV_VALID;
	276
	277	return 0;
	278	}
	279
	280	void ironlake_opregion_gse_intr(struct drm_device *dev)
	281	{
	282	struct drm_i915_private *dev_priv = dev->dev_private;
	283	struct opregion_asle *asle = dev_priv->opregion.asle;
	284	u32 asle_stat = 0;
	285	u32 asle_req;
	286
	287	if (!asle)
	288	return;
	289
	290	asle_req = asle->aslc & ASLE_REQ_MSK;
	291
	292	if (!asle_req) {
	293	DRM_DEBUG_DRIVER("non asle set request??\n");
	294	return;
	295	}
	296
	297	if (asle_req & ASLE_SET_ALS_ILLUM) {
	298	DRM_DEBUG_DRIVER("Illum is not supported\n");
	299	asle_stat \|= ASLE_ALS_ILLUM_FAILED;
	300	}
	301
	302	if (asle_req & ASLE_SET_BACKLIGHT)
	303	asle_stat \|= asle_set_backlight_ironlake(dev, asle->bclp);
	304
	305	if (asle_req & ASLE_SET_PFIT) {
	306	DRM_DEBUG_DRIVER("Pfit is not supported\n");
	307	asle_stat \|= ASLE_PFIT_FAILED;
	308	}
	309
	310	if (asle_req & ASLE_SET_PWM_FREQ) {
	311	DRM_DEBUG_DRIVER("PWM freq is not supported\n");
	312	asle_stat \|= ASLE_PWM_FREQ_FAILED;
	313	}
314
315	asle->aslc = asle_stat;
316	}
8ee1c3db MG	317	#define ASLE_ALS_EN (1<<0)
	318	#define ASLE_BLC_EN (1<<1)
	319	#define ASLE_PFIT_EN (1<<2)
	320	#define ASLE_PFMB_EN (1<<3)
	321
	322	void opregion_enable_asle(struct drm_device *dev)
	323	{
	324	struct drm_i915_private *dev_priv = dev->dev_private;
	325	struct opregion_asle *asle = dev_priv->opregion.asle;
	326
	327	if (asle) {
8ee1c3db	328	if (IS_MOBILE(dev)) {
7c463586 KP	329	unsigned long irqflags;
	330
	331	spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags);
01c66889	332	intel_enable_asle(dev);
7c463586 KP	333	spin_unlock_irqrestore(&dev_priv->user_irq_lock,
	334	irqflags);
	335	}
8ee1c3db MG	336
	337	asle->tche = ASLE_ALS_EN \| ASLE_BLC_EN \| ASLE_PFIT_EN \|
	338	ASLE_PFMB_EN;
	339	asle->ardy = 1;
	340	}
	341	}
	342
	343	#define ACPI_EV_DISPLAY_SWITCH (1<<0)
	344	#define ACPI_EV_LID (1<<1)
	345	#define ACPI_EV_DOCK (1<<2)
	346
	347	static struct intel_opregion *system_opregion;
	348
b358d0a6 HE	349	static int intel_opregion_video_event(struct notifier_block *nb,
b358d0a6 HE	350	unsigned long val, void *data)
8ee1c3db MG	351	{
	352	/* The only video events relevant to opregion are 0x80. These indicate
	353	either a docking event, lid switch or display switch request. In
	354	Linux, these are handled by the dock, button and video drivers.
	355	We might want to fix the video driver to be opregion-aware in
	356	future, but right now we just indicate to the firmware that the
	357	request has been handled */
	358
	359	struct opregion_acpi *acpi;
	360
	361	if (!system_opregion)
	362	return NOTIFY_DONE;
	363
	364	acpi = system_opregion->acpi;
	365	acpi->csts = 0;
	366
	367	return NOTIFY_OK;
	368	}
	369
	370	static struct notifier_block intel_opregion_notifier = {
	371	.notifier_call = intel_opregion_video_event,
	372	};
	373
74a365b3 MG	374	/*
	375	* Initialise the DIDL field in opregion. This passes a list of devices to
	376	* the firmware. Values are defined by section B.4.2 of the ACPI specification
	377	* (version 3)
	378	*/
	379
	380	static void intel_didl_outputs(struct drm_device *dev)
	381	{
	382	struct drm_i915_private *dev_priv = dev->dev_private;
	383	struct intel_opregion *opregion = &dev_priv->opregion;
	384	struct drm_connector *connector;
3143751f ZR	385	acpi_handle handle;
	386	struct acpi_device acpi_dev, acpi_cdev, *acpi_video_bus = NULL;
	387	unsigned long long device_id;
	388	acpi_status status;
74a365b3 MG	389	int i = 0;
74a365b3 MG	390
3143751f ZR	391	handle = DEVICE_ACPI_HANDLE(&dev->pdev->dev);
	392	if (!handle \|\| ACPI_FAILURE(acpi_bus_get_device(handle, &acpi_dev)))
	393	return;
	394
	395	if (acpi_is_video_device(acpi_dev))
	396	acpi_video_bus = acpi_dev;
	397	else {
	398	list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
	399	if (acpi_is_video_device(acpi_cdev)) {
	400	acpi_video_bus = acpi_cdev;
	401	break;
	402	}
	403	}
	404	}
	405
	406	if (!acpi_video_bus) {
	407	printk(KERN_WARNING "No ACPI video bus found\n");
	408	return;
	409	}
	410
	411	list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
	412	if (i >= 8) {
	413	dev_printk (KERN_ERR, &dev->pdev->dev,
	414	"More than 8 outputs detected\n");
	415	return;
	416	}
	417	status =
	418	acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
	419	NULL, &device_id);
	420	if (ACPI_SUCCESS(status)) {
	421	if (!device_id)
	422	goto blind_set;
	423	opregion->acpi->didl[i] = (u32)(device_id & 0x0f0f);
	424	i++;
	425	}
	426	}
	427
	428	end:
	429	/* If fewer than 8 outputs, the list must be null terminated */
	430	if (i < 8)
	431	opregion->acpi->didl[i] = 0;
	432	return;
	433
	434	blind_set:
	435	i = 0;
74a365b3 MG	436	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
	437	int output_type = ACPI_OTHER_OUTPUT;
	438	if (i >= 8) {
	439	dev_printk (KERN_ERR, &dev->pdev->dev,
	440	"More than 8 outputs detected\n");
	441	return;
	442	}
	443	switch (connector->connector_type) {
	444	case DRM_MODE_CONNECTOR_VGA:
	445	case DRM_MODE_CONNECTOR_DVIA:
	446	output_type = ACPI_VGA_OUTPUT;
	447	break;
	448	case DRM_MODE_CONNECTOR_Composite:
	449	case DRM_MODE_CONNECTOR_SVIDEO:
	450	case DRM_MODE_CONNECTOR_Component:
	451	case DRM_MODE_CONNECTOR_9PinDIN:
	452	output_type = ACPI_TV_OUTPUT;
	453	break;
	454	case DRM_MODE_CONNECTOR_DVII:
	455	case DRM_MODE_CONNECTOR_DVID:
	456	case DRM_MODE_CONNECTOR_DisplayPort:
	457	case DRM_MODE_CONNECTOR_HDMIA:
	458	case DRM_MODE_CONNECTOR_HDMIB:
	459	output_type = ACPI_DIGITAL_OUTPUT;
	460	break;
	461	case DRM_MODE_CONNECTOR_LVDS:
	462	output_type = ACPI_LVDS_OUTPUT;
	463	break;
	464	}
	465	opregion->acpi->didl[i] \|= (1<<31) \| output_type \| i;
	466	i++;
	467	}
3143751f	468	goto end;
74a365b3 MG	469	}
	470
	471	int intel_opregion_init(struct drm_device *dev, int resume)
8ee1c3db MG	472	{
	473	struct drm_i915_private *dev_priv = dev->dev_private;
	474	struct intel_opregion *opregion = &dev_priv->opregion;
	475	void *base;
	476	u32 asls, mboxes;
	477	int err = 0;
	478
	479	pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
44d98a61	480	DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
8ee1c3db	481	if (asls == 0) {
44d98a61	482	DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
8ee1c3db MG	483	return -ENOTSUPP;
	484	}
	485
	486	base = ioremap(asls, OPREGION_SZ);
	487	if (!base)
	488	return -ENOMEM;
	489
	490	opregion->header = base;
	491	if (memcmp(opregion->header->signature, OPREGION_SIGNATURE, 16)) {
44d98a61	492	DRM_DEBUG_DRIVER("opregion signature mismatch\n");
8ee1c3db MG	493	err = -EINVAL;
	494	goto err_out;
	495	}
	496
	497	mboxes = opregion->header->mboxes;
	498	if (mboxes & MBOX_ACPI) {
44d98a61	499	DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
8ee1c3db	500	opregion->acpi = base + OPREGION_ACPI_OFFSET;
d770e3cf	501	if (drm_core_check_feature(dev, DRIVER_MODESET))
74a365b3	502	intel_didl_outputs(dev);
8ee1c3db	503	} else {
44d98a61	504	DRM_DEBUG_DRIVER("Public ACPI methods not supported\n");
8ee1c3db MG	505	err = -ENOTSUPP;
	506	goto err_out;
	507	}
	508	opregion->enabled = 1;
	509
	510	if (mboxes & MBOX_SWSCI) {
44d98a61	511	DRM_DEBUG_DRIVER("SWSCI supported\n");
8ee1c3db MG	512	opregion->swsci = base + OPREGION_SWSCI_OFFSET;
	513	}
	514	if (mboxes & MBOX_ASLE) {
44d98a61	515	DRM_DEBUG_DRIVER("ASLE supported\n");
8ee1c3db	516	opregion->asle = base + OPREGION_ASLE_OFFSET;
44ab4315	517	opregion_enable_asle(dev);
8ee1c3db MG	518	}
8ee1c3db MG	519
d770e3cf MG	520	if (!resume)
	521	acpi_video_register();
	522
	523
8ee1c3db MG	524	/* Notify BIOS we are ready to handle ACPI video ext notifs.
	525	* Right now, all the events are handled by the ACPI video module.
	526	* We don't actually need to do anything with them. */
	527	opregion->acpi->csts = 0;
	528	opregion->acpi->drdy = 1;
	529
	530	system_opregion = opregion;
	531	register_acpi_notifier(&intel_opregion_notifier);
	532
	533	return 0;
	534
	535	err_out:
	536	iounmap(opregion->header);
	537	opregion->header = NULL;
54b9b308	538	acpi_video_register();
8ee1c3db MG	539	return err;
	540	}
	541
3b1c1c11	542	void intel_opregion_free(struct drm_device *dev, int suspend)
8ee1c3db MG	543	{
	544	struct drm_i915_private *dev_priv = dev->dev_private;
	545	struct intel_opregion *opregion = &dev_priv->opregion;
	546
	547	if (!opregion->enabled)
	548	return;
	549
3b1c1c11	550	if (!suspend)
86e437f0	551	acpi_video_unregister();
3b1c1c11	552
8ee1c3db MG	553	opregion->acpi->drdy = 0;
	554
	555	system_opregion = NULL;
	556	unregister_acpi_notifier(&intel_opregion_notifier);
	557
	558	/* just clear all opregion memory pointers now */
	559	iounmap(opregion->header);
	560	opregion->header = NULL;
	561	opregion->acpi = NULL;
	562	opregion->swsci = NULL;
	563	opregion->asle = NULL;
	564
	565	opregion->enabled = 0;
	566	}