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linux/drivers/gpu/drm/i915/intel_opregion.c

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/*
* 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.
*
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/acpi.h>
#include <linux/acpi_io.h>
#include <acpi/video.h>
#include <drm/drmP.h>
#include <drm/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 __iomem *asle = dev_priv->opregion.asle;
u32 max;
DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
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);
iowrite32((bclp*0x64)/0xff | ASLE_CBLV_VALID, &asle->cblv);
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 __iomem *asle = dev_priv->opregion.asle;
u32 asle_stat = 0;
u32 asle_req;
if (!asle)
return;
asle_req = ioread32(&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, ioread32(&asle->alsi));
if (asle_req & ASLE_SET_BACKLIGHT)
asle_stat |= asle_set_backlight(dev, ioread32(&asle->bclp));
if (asle_req & ASLE_SET_PFIT)
asle_stat |= asle_set_pfit(dev, ioread32(&asle->pfit));
if (asle_req & ASLE_SET_PWM_FREQ)
asle_stat |= asle_set_pwm_freq(dev, ioread32(&asle->pfmb));
iowrite32(asle_stat, &asle->aslc);
}
void intel_opregion_gse_intr(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
u32 asle_stat = 0;
u32 asle_req;
if (!asle)
return;
asle_req = ioread32(&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, ioread32(&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;
}
iowrite32(asle_stat, &asle->aslc);
}
#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 __iomem *asle = dev_priv->opregion.asle;
if (asle) {
if (IS_MOBILE(dev))
intel_enable_asle(dev);
iowrite32(ASLE_ALS_EN | ASLE_BLC_EN | ASLE_PFIT_EN |
ASLE_PFMB_EN,
&asle->tche);
iowrite32(1, &asle->ardy);
}
}
#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 __iomem *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 &&
(ioread32(&acpi->cevt) & 1) == 0)
ret = NOTIFY_BAD;
iowrite32(0, &acpi->csts);
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;
u32 temp;
int i = 0;
handle = DEVICE_ACPI_HANDLE(&dev->pdev->dev);
if (!handle || acpi_bus_get_device(handle, &acpi_dev))
return;
if (acpi_is_video_device(handle))
acpi_video_bus = acpi_dev;
else {
list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
if (acpi_is_video_device(acpi_cdev->handle)) {
acpi_video_bus = acpi_cdev;
break;
}
}
}
if (!acpi_video_bus) {
pr_warn("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;
iowrite32((u32)(device_id & 0x0f0f),
&opregion->acpi->didl[i]);
i++;
}
}
end:
/* If fewer than 8 outputs, the list must be null terminated */
if (i < 8)
iowrite32(0, &opregion->acpi->didl[i]);
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;
}
temp = ioread32(&opregion->acpi->didl[i]);
iowrite32(temp | (1<<31) | output_type | i,
&opregion->acpi->didl[i]);
i++;
}
goto end;
}
static void intel_setup_cadls(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_opregion *opregion = &dev_priv->opregion;
int i = 0;
u32 disp_id;
/* Initialize the CADL field by duplicating the DIDL values.
* Technically, this is not always correct as display outputs may exist,
* but not active. This initialization is necessary for some Clevo
* laptops that check this field before processing the brightness and
* display switching hotkeys. Just like DIDL, CADL is NULL-terminated if
* there are less than eight devices. */
do {
disp_id = ioread32(&opregion->acpi->didl[i]);
iowrite32(disp_id, &opregion->acpi->cadl[i]);
} while (++i < 8 && disp_id != 0);
}
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);
intel_setup_cadls(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. */
iowrite32(0, &opregion->acpi->csts);
iowrite32(1, &opregion->acpi->drdy);
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) {
iowrite32(0, &opregion->acpi->drdy);
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 __iomem *base;
u32 asls, mboxes;
char buf[sizeof(OPREGION_SIGNATURE)];
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;
memcpy_fromio(buf, base, sizeof(buf));
if (memcmp(buf, 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 = ioread32(&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;
}
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