| /* |
| * 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; |
| |
| 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_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) { |
| 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; |
| } |