[deliverable/linux.git] / drivers / gpu / drm / i915 / intel_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 <linux/acpi_io.h>
#include <acpi/video.h>

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

#define PCI_ASLE 0xe4
#define PCI_ASLS 0xfc

#define OPREGION_HEADER_OFFSET 0
#define OPREGION_ACPI_OFFSET   0x100
#define   ACPI_CLID 0x01ac /* current lid state indicator */
#define   ACPI_CDCK 0x01b0 /* current docking state indicator */
#define OPREGION_SWSCI_OFFSET  0x200
#define OPREGION_ASLE_OFFSET   0x300
#define OPREGION_VBT_OFFSET    0x400

#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_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)

#ifdef CONFIG_ACPI
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 max;

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

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

	max = intel_panel_get_max_backlight(dev);
	intel_panel_set_backlight(dev, bclp * max / 255);
	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_FAILED;
	return 0;
}

void intel_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;
}

void intel_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(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 intel_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))
			intel_enable_asle(dev);

		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.
	*/

	struct opregion_acpi *acpi;
	struct acpi_bus_event *event = data;
	int ret = NOTIFY_OK;

	if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
		return NOTIFY_DONE;

	if (!system_opregion)
		return NOTIFY_DONE;

	acpi = system_opregion->acpi;

	if (event->type == 0x80 && !(acpi->cevt & 0x1))
		ret = NOTIFY_BAD;

	acpi->csts = 0;

	return ret;
}

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;
}

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

	if (!opregion->header)
		return;

	if (opregion->acpi) {
		if (drm_core_check_feature(dev, DRIVER_MODESET))
			intel_didl_outputs(dev);

		/* 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);
	}

	if (opregion->asle)
		intel_opregion_enable_asle(dev);
}

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

	if (!opregion->header)
		return;

	if (opregion->acpi) {
		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->vbt = NULL;
}
#endif

int intel_opregion_setup(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_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
	if (asls == 0) {
		DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
		return -ENOTSUPP;
	}

	base = acpi_os_ioremap(asls, OPREGION_SIZE);
	if (!base)
		return -ENOMEM;

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

	opregion->lid_state = base + ACPI_CLID;

	mboxes = opregion->header->mboxes;
	if (mboxes & MBOX_ACPI) {
		DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
		opregion->acpi = base + OPREGION_ACPI_OFFSET;
	}

	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;
	}

	return 0;

err_out:
	iounmap(base);
	return err;
}
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>
b705120e	29	#include <linux/acpi_io.h>
74a365b3	30	#include <acpi/video.h>
8ee1c3db MG	31
	32	#include "drmP.h"
	33	#include "i915_drm.h"
	34	#include "i915_drv.h"
a9573556	35	#include "intel_drv.h"
8ee1c3db MG	36
8ee1c3db MG	37	#define PCI_ASLE 0xe4
8ee1c3db MG	38	#define PCI_ASLS 0xfc
8ee1c3db MG	39
8ee1c3db MG	40	#define OPREGION_HEADER_OFFSET 0
8ee1c3db MG	41	#define OPREGION_ACPI_OFFSET 0x100
82d3c90c CW	42	#define ACPI_CLID 0x01ac /* current lid state indicator */
82d3c90c CW	43	#define ACPI_CDCK 0x01b0 /* current docking state indicator */
8ee1c3db MG	44	#define OPREGION_SWSCI_OFFSET 0x200
8ee1c3db MG	45	#define OPREGION_ASLE_OFFSET 0x300
44834a67	46	#define OPREGION_VBT_OFFSET 0x400
8ee1c3db MG	47
	48	#define OPREGION_SIGNATURE "IntelGraphicsMem"
	49	#define MBOX_ACPI (1<<0)
	50	#define MBOX_SWSCI (1<<1)
	51	#define MBOX_ASLE (1<<2)
	52
	53	struct opregion_header {
0206e353 AJ	54	u8 signature[16];
	55	u32 size;
	56	u32 opregion_ver;
	57	u8 bios_ver[32];
	58	u8 vbios_ver[16];
	59	u8 driver_ver[16];
	60	u32 mboxes;
	61	u8 reserved[164];
8ee1c3db MG	62	} __attribute__((packed));
	63
	64	/* OpRegion mailbox #1: public ACPI methods */
	65	struct opregion_acpi {
0206e353 AJ	66	u32 drdy; /* driver readiness */
	67	u32 csts; /* notification status */
	68	u32 cevt; /* current event */
	69	u8 rsvd1[20];
	70	u32 didl[8]; /* supported display devices ID list */
	71	u32 cpdl[8]; /* currently presented display list */
	72	u32 cadl[8]; /* currently active display list */
	73	u32 nadl[8]; /* next active devices list */
	74	u32 aslp; /* ASL sleep time-out */
	75	u32 tidx; /* toggle table index */
	76	u32 chpd; /* current hotplug enable indicator */
	77	u32 clid; /* current lid state*/
	78	u32 cdck; /* current docking state */
	79	u32 sxsw; /* Sx state resume */
	80	u32 evts; /* ASL supported events */
	81	u32 cnot; /* current OS notification */
	82	u32 nrdy; /* driver status */
	83	u8 rsvd2[60];
8ee1c3db MG	84	} __attribute__((packed));
	85
	86	/* OpRegion mailbox #2: SWSCI */
	87	struct opregion_swsci {
0206e353 AJ	88	u32 scic; /* SWSCI command\|status\|data */
	89	u32 parm; /* command parameters */
	90	u32 dslp; /* driver sleep time-out */
	91	u8 rsvd[244];
8ee1c3db MG	92	} __attribute__((packed));
	93
	94	/* OpRegion mailbox #3: ASLE */
	95	struct opregion_asle {
0206e353 AJ	96	u32 ardy; /* driver readiness */
	97	u32 aslc; /* ASLE interrupt command */
	98	u32 tche; /* technology enabled indicator */
	99	u32 alsi; /* current ALS illuminance reading */
	100	u32 bclp; /* backlight brightness to set */
	101	u32 pfit; /* panel fitting state */
	102	u32 cblv; /* current brightness level */
	103	u16 bclm[20]; /* backlight level duty cycle mapping table */
	104	u32 cpfm; /* current panel fitting mode */
	105	u32 epfm; /* enabled panel fitting modes */
	106	u8 plut[74]; /* panel LUT and identifier */
	107	u32 pfmb; /* PWM freq and min brightness */
	108	u8 rsvd[102];
8ee1c3db MG	109	} __attribute__((packed));
	110
	111	/* ASLE irq request bits */
	112	#define ASLE_SET_ALS_ILLUM (1 << 0)
	113	#define ASLE_SET_BACKLIGHT (1 << 1)
	114	#define ASLE_SET_PFIT (1 << 2)
	115	#define ASLE_SET_PWM_FREQ (1 << 3)
	116	#define ASLE_REQ_MSK 0xf
	117
	118	/* response bits of ASLE irq request */
01c66889 ZY	119	#define ASLE_ALS_ILLUM_FAILED (1<<10)
	120	#define ASLE_BACKLIGHT_FAILED (1<<12)
	121	#define ASLE_PFIT_FAILED (1<<14)
	122	#define ASLE_PWM_FREQ_FAILED (1<<16)
8ee1c3db MG	123
	124	/* ASLE backlight brightness to set */
	125	#define ASLE_BCLP_VALID (1<<31)
	126	#define ASLE_BCLP_MSK (~(1<<31))
	127
	128	/* ASLE panel fitting request */
	129	#define ASLE_PFIT_VALID (1<<31)
	130	#define ASLE_PFIT_CENTER (1<<0)
	131	#define ASLE_PFIT_STRETCH_TEXT (1<<1)
	132	#define ASLE_PFIT_STRETCH_GFX (1<<2)
	133
	134	/* PWM frequency and minimum brightness */
	135	#define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
	136	#define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
	137	#define ASLE_PFMB_PWM_MASK (0x7ffffe00)
	138	#define ASLE_PFMB_PWM_VALID (1<<31)
	139
	140	#define ASLE_CBLV_VALID (1<<31)
	141
74a365b3 MG	142	#define ACPI_OTHER_OUTPUT (0<<8)
	143	#define ACPI_VGA_OUTPUT (1<<8)
	144	#define ACPI_TV_OUTPUT (2<<8)
	145	#define ACPI_DIGITAL_OUTPUT (3<<8)
	146	#define ACPI_LVDS_OUTPUT (4<<8)
	147
44834a67	148	#ifdef CONFIG_ACPI
8ee1c3db MG	149	static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
	150	{
	151	struct drm_i915_private *dev_priv = dev->dev_private;
	152	struct opregion_asle *asle = dev_priv->opregion.asle;
a9573556	153	u32 max;
8ee1c3db MG	154
8ee1c3db MG	155	if (!(bclp & ASLE_BCLP_VALID))
862daefc	156	return ASLE_BACKLIGHT_FAILED;
8ee1c3db MG	157
8ee1c3db MG	158	bclp &= ASLE_BCLP_MSK;
a9573556	159	if (bclp > 255)
862daefc	160	return ASLE_BACKLIGHT_FAILED;
8ee1c3db	161
a9573556 CW	162	max = intel_panel_get_max_backlight(dev);
a9573556 CW	163	intel_panel_set_backlight(dev, bclp * max / 255);
8ee1c3db MG	164	asle->cblv = (bclp*0x64)/0xff \| ASLE_CBLV_VALID;
	165
	166	return 0;
	167	}
	168
	169	static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
	170	{
	171	/* alsi is the current ALS reading in lux. 0 indicates below sensor
	172	range, 0xffff indicates above sensor range. 1-0xfffe are valid */
	173	return 0;
	174	}
	175
	176	static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
	177	{
	178	struct drm_i915_private *dev_priv = dev->dev_private;
	179	if (pfmb & ASLE_PFMB_PWM_VALID) {
	180	u32 blc_pwm_ctl = I915_READ(BLC_PWM_CTL);
	181	u32 pwm = pfmb & ASLE_PFMB_PWM_MASK;
	182	blc_pwm_ctl &= BACKLIGHT_DUTY_CYCLE_MASK;
	183	pwm = pwm >> 9;
	184	/* FIXME - what do we do with the PWM? */
	185	}
	186	return 0;
	187	}
	188
	189	static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
	190	{
	191	/* Panel fitting is currently controlled by the X code, so this is a
	192	noop until modesetting support works fully */
	193	if (!(pfit & ASLE_PFIT_VALID))
862daefc	194	return ASLE_PFIT_FAILED;
8ee1c3db MG	195	return 0;
	196	}
	197
3b617967	198	void intel_opregion_asle_intr(struct drm_device *dev)
8ee1c3db MG	199	{
	200	struct drm_i915_private *dev_priv = dev->dev_private;
	201	struct opregion_asle *asle = dev_priv->opregion.asle;
	202	u32 asle_stat = 0;
	203	u32 asle_req;
	204
	205	if (!asle)
	206	return;
	207
	208	asle_req = asle->aslc & ASLE_REQ_MSK;
	209
	210	if (!asle_req) {
44d98a61	211	DRM_DEBUG_DRIVER("non asle set request??\n");
8ee1c3db MG	212	return;
	213	}
	214
	215	if (asle_req & ASLE_SET_ALS_ILLUM)
	216	asle_stat \|= asle_set_als_illum(dev, asle->alsi);
	217
	218	if (asle_req & ASLE_SET_BACKLIGHT)
	219	asle_stat \|= asle_set_backlight(dev, asle->bclp);
	220
	221	if (asle_req & ASLE_SET_PFIT)
	222	asle_stat \|= asle_set_pfit(dev, asle->pfit);
	223
	224	if (asle_req & ASLE_SET_PWM_FREQ)
	225	asle_stat \|= asle_set_pwm_freq(dev, asle->pfmb);
	226
	227	asle->aslc = asle_stat;
	228	}
	229
3b617967	230	void intel_opregion_gse_intr(struct drm_device *dev)
01c66889 ZY	231	{
	232	struct drm_i915_private *dev_priv = dev->dev_private;
	233	struct opregion_asle *asle = dev_priv->opregion.asle;
	234	u32 asle_stat = 0;
	235	u32 asle_req;
	236
	237	if (!asle)
	238	return;
	239
	240	asle_req = asle->aslc & ASLE_REQ_MSK;
	241
	242	if (!asle_req) {
	243	DRM_DEBUG_DRIVER("non asle set request??\n");
	244	return;
	245	}
	246
	247	if (asle_req & ASLE_SET_ALS_ILLUM) {
	248	DRM_DEBUG_DRIVER("Illum is not supported\n");
	249	asle_stat \|= ASLE_ALS_ILLUM_FAILED;
	250	}
	251
	252	if (asle_req & ASLE_SET_BACKLIGHT)
a9573556	253	asle_stat \|= asle_set_backlight(dev, asle->bclp);
01c66889 ZY	254
	255	if (asle_req & ASLE_SET_PFIT) {
	256	DRM_DEBUG_DRIVER("Pfit is not supported\n");
	257	asle_stat \|= ASLE_PFIT_FAILED;
	258	}
	259
	260	if (asle_req & ASLE_SET_PWM_FREQ) {
	261	DRM_DEBUG_DRIVER("PWM freq is not supported\n");
	262	asle_stat \|= ASLE_PWM_FREQ_FAILED;
	263	}
	264
	265	asle->aslc = asle_stat;
	266	}
8ee1c3db MG	267	#define ASLE_ALS_EN (1<<0)
	268	#define ASLE_BLC_EN (1<<1)
	269	#define ASLE_PFIT_EN (1<<2)
	270	#define ASLE_PFMB_EN (1<<3)
	271
3b617967	272	void intel_opregion_enable_asle(struct drm_device *dev)
8ee1c3db MG	273	{
	274	struct drm_i915_private *dev_priv = dev->dev_private;
	275	struct opregion_asle *asle = dev_priv->opregion.asle;
	276
	277	if (asle) {
1ec14ad3	278	if (IS_MOBILE(dev))
01c66889	279	intel_enable_asle(dev);
8ee1c3db MG	280
	281	asle->tche = ASLE_ALS_EN \| ASLE_BLC_EN \| ASLE_PFIT_EN \|
	282	ASLE_PFMB_EN;
	283	asle->ardy = 1;
	284	}
	285	}
	286
	287	#define ACPI_EV_DISPLAY_SWITCH (1<<0)
	288	#define ACPI_EV_LID (1<<1)
	289	#define ACPI_EV_DOCK (1<<2)
	290
	291	static struct intel_opregion *system_opregion;
	292
b358d0a6 HE	293	static int intel_opregion_video_event(struct notifier_block *nb,
b358d0a6 HE	294	unsigned long val, void *data)
8ee1c3db MG	295	{
	296	/* The only video events relevant to opregion are 0x80. These indicate
	297	either a docking event, lid switch or display switch request. In
	298	Linux, these are handled by the dock, button and video drivers.
f5a3d0c4	299	*/
8ee1c3db MG	300
8ee1c3db MG	301	struct opregion_acpi *acpi;
f5a3d0c4 MG	302	struct acpi_bus_event *event = data;
	303	int ret = NOTIFY_OK;
	304
	305	if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
	306	return NOTIFY_DONE;
8ee1c3db MG	307
	308	if (!system_opregion)
	309	return NOTIFY_DONE;
	310
	311	acpi = system_opregion->acpi;
f5a3d0c4 MG	312
	313	if (event->type == 0x80 && !(acpi->cevt & 0x1))
	314	ret = NOTIFY_BAD;
	315
8ee1c3db MG	316	acpi->csts = 0;
8ee1c3db MG	317
f5a3d0c4	318	return ret;
8ee1c3db MG	319	}
	320
	321	static struct notifier_block intel_opregion_notifier = {
	322	.notifier_call = intel_opregion_video_event,
	323	};
	324
74a365b3 MG	325	/*
	326	* Initialise the DIDL field in opregion. This passes a list of devices to
	327	* the firmware. Values are defined by section B.4.2 of the ACPI specification
	328	* (version 3)
	329	*/
	330
	331	static void intel_didl_outputs(struct drm_device *dev)
	332	{
	333	struct drm_i915_private *dev_priv = dev->dev_private;
	334	struct intel_opregion *opregion = &dev_priv->opregion;
	335	struct drm_connector *connector;
3143751f ZR	336	acpi_handle handle;
	337	struct acpi_device acpi_dev, acpi_cdev, *acpi_video_bus = NULL;
	338	unsigned long long device_id;
	339	acpi_status status;
74a365b3 MG	340	int i = 0;
74a365b3 MG	341
3143751f ZR	342	handle = DEVICE_ACPI_HANDLE(&dev->pdev->dev);
	343	if (!handle \|\| ACPI_FAILURE(acpi_bus_get_device(handle, &acpi_dev)))
	344	return;
	345
	346	if (acpi_is_video_device(acpi_dev))
	347	acpi_video_bus = acpi_dev;
	348	else {
	349	list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
	350	if (acpi_is_video_device(acpi_cdev)) {
	351	acpi_video_bus = acpi_cdev;
	352	break;
	353	}
	354	}
	355	}
	356
	357	if (!acpi_video_bus) {
	358	printk(KERN_WARNING "No ACPI video bus found\n");
	359	return;
	360	}
	361
	362	list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
	363	if (i >= 8) {
0206e353	364	dev_printk(KERN_ERR, &dev->pdev->dev,
3143751f ZR	365	"More than 8 outputs detected\n");
	366	return;
	367	}
	368	status =
	369	acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
	370	NULL, &device_id);
	371	if (ACPI_SUCCESS(status)) {
	372	if (!device_id)
	373	goto blind_set;
	374	opregion->acpi->didl[i] = (u32)(device_id & 0x0f0f);
	375	i++;
	376	}
	377	}
	378
	379	end:
	380	/* If fewer than 8 outputs, the list must be null terminated */
	381	if (i < 8)
	382	opregion->acpi->didl[i] = 0;
	383	return;
	384
	385	blind_set:
	386	i = 0;
74a365b3 MG	387	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
	388	int output_type = ACPI_OTHER_OUTPUT;
	389	if (i >= 8) {
0206e353	390	dev_printk(KERN_ERR, &dev->pdev->dev,
74a365b3 MG	391	"More than 8 outputs detected\n");
	392	return;
	393	}
	394	switch (connector->connector_type) {
	395	case DRM_MODE_CONNECTOR_VGA:
	396	case DRM_MODE_CONNECTOR_DVIA:
	397	output_type = ACPI_VGA_OUTPUT;
	398	break;
	399	case DRM_MODE_CONNECTOR_Composite:
	400	case DRM_MODE_CONNECTOR_SVIDEO:
	401	case DRM_MODE_CONNECTOR_Component:
	402	case DRM_MODE_CONNECTOR_9PinDIN:
	403	output_type = ACPI_TV_OUTPUT;
	404	break;
	405	case DRM_MODE_CONNECTOR_DVII:
	406	case DRM_MODE_CONNECTOR_DVID:
	407	case DRM_MODE_CONNECTOR_DisplayPort:
	408	case DRM_MODE_CONNECTOR_HDMIA:
	409	case DRM_MODE_CONNECTOR_HDMIB:
	410	output_type = ACPI_DIGITAL_OUTPUT;
	411	break;
	412	case DRM_MODE_CONNECTOR_LVDS:
	413	output_type = ACPI_LVDS_OUTPUT;
	414	break;
	415	}
	416	opregion->acpi->didl[i] \|= (1<<31) \| output_type \| i;
	417	i++;
	418	}
3143751f	419	goto end;
74a365b3 MG	420	}
74a365b3 MG	421
44834a67 CW	422	void intel_opregion_init(struct drm_device *dev)
	423	{
	424	struct drm_i915_private *dev_priv = dev->dev_private;
	425	struct intel_opregion *opregion = &dev_priv->opregion;
	426
	427	if (!opregion->header)
	428	return;
	429
	430	if (opregion->acpi) {
	431	if (drm_core_check_feature(dev, DRIVER_MODESET))
	432	intel_didl_outputs(dev);
	433
	434	/* Notify BIOS we are ready to handle ACPI video ext notifs.
	435	* Right now, all the events are handled by the ACPI video module.
	436	* We don't actually need to do anything with them. */
	437	opregion->acpi->csts = 0;
	438	opregion->acpi->drdy = 1;
	439
	440	system_opregion = opregion;
	441	register_acpi_notifier(&intel_opregion_notifier);
	442	}
	443
	444	if (opregion->asle)
	445	intel_opregion_enable_asle(dev);
	446	}
	447
	448	void intel_opregion_fini(struct drm_device *dev)
	449	{
	450	struct drm_i915_private *dev_priv = dev->dev_private;
	451	struct intel_opregion *opregion = &dev_priv->opregion;
	452
	453	if (!opregion->header)
	454	return;
	455
	456	if (opregion->acpi) {
	457	opregion->acpi->drdy = 0;
	458
	459	system_opregion = NULL;
	460	unregister_acpi_notifier(&intel_opregion_notifier);
	461	}
	462
	463	/* just clear all opregion memory pointers now */
	464	iounmap(opregion->header);
	465	opregion->header = NULL;
	466	opregion->acpi = NULL;
	467	opregion->swsci = NULL;
	468	opregion->asle = NULL;
	469	opregion->vbt = NULL;
	470	}
	471	#endif
	472
	473	int intel_opregion_setup(struct drm_device *dev)
8ee1c3db MG	474	{
	475	struct drm_i915_private *dev_priv = dev->dev_private;
	476	struct intel_opregion *opregion = &dev_priv->opregion;
	477	void *base;
	478	u32 asls, mboxes;
	479	int err = 0;
	480
	481	pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
44d98a61	482	DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
8ee1c3db	483	if (asls == 0) {
44d98a61	484	DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
8ee1c3db MG	485	return -ENOTSUPP;
	486	}
	487
b705120e	488	base = acpi_os_ioremap(asls, OPREGION_SIZE);
8ee1c3db MG	489	if (!base)
	490	return -ENOMEM;
	491
44834a67	492	if (memcmp(base, OPREGION_SIGNATURE, 16)) {
44d98a61	493	DRM_DEBUG_DRIVER("opregion signature mismatch\n");
8ee1c3db MG	494	err = -EINVAL;
	495	goto err_out;
	496	}
44834a67 CW	497	opregion->header = base;
44834a67 CW	498	opregion->vbt = base + OPREGION_VBT_OFFSET;
8ee1c3db	499
82d3c90c	500	opregion->lid_state = base + ACPI_CLID;
01fe9dbd	501
8ee1c3db MG	502	mboxes = opregion->header->mboxes;
8ee1c3db MG	503	if (mboxes & MBOX_ACPI) {
44d98a61	504	DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
8ee1c3db	505	opregion->acpi = base + OPREGION_ACPI_OFFSET;
8ee1c3db	506	}
8ee1c3db MG	507
8ee1c3db MG	508	if (mboxes & MBOX_SWSCI) {
44d98a61	509	DRM_DEBUG_DRIVER("SWSCI supported\n");
8ee1c3db MG	510	opregion->swsci = base + OPREGION_SWSCI_OFFSET;
	511	}
	512	if (mboxes & MBOX_ASLE) {
44d98a61	513	DRM_DEBUG_DRIVER("ASLE supported\n");
8ee1c3db MG	514	opregion->asle = base + OPREGION_ASLE_OFFSET;
	515	}
	516
8ee1c3db MG	517	return 0;
	518
	519	err_out:
30c56660	520	iounmap(base);
8ee1c3db MG	521	return err;
8ee1c3db MG	522	}