/* * Copyright 2008 Intel Corporation * Copyright 2008 Red Hat * * 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 #include #include #include #include #include "i915_drv.h" #include "intel_drv.h" #define PCI_ASLE 0xe4 #define PCI_ASLS 0xfc #define PCI_SWSCI 0xe8 #define PCI_SWSCI_SCISEL (1 << 15) #define PCI_SWSCI_GSSCIE (1 << 0) #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)); /* Driver readiness indicator */ #define ASLE_ARDY_READY (1 << 0) #define ASLE_ARDY_NOT_READY (0 << 0) /* 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) /* Technology enabled indicator */ #define ASLE_TCHE_ALS_EN (1 << 0) #define ASLE_TCHE_BLC_EN (1 << 1) #define ASLE_TCHE_PFIT_EN (1 << 2) #define ASLE_TCHE_PFMB_EN (1 << 3) /* 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) /* Software System Control Interrupt (SWSCI) */ #define SWSCI_SCIC_INDICATOR (1 << 0) #define SWSCI_SCIC_MAIN_FUNCTION_SHIFT 1 #define SWSCI_SCIC_MAIN_FUNCTION_MASK (0xf << 1) #define SWSCI_SCIC_SUB_FUNCTION_SHIFT 8 #define SWSCI_SCIC_SUB_FUNCTION_MASK (0xff << 8) #define SWSCI_SCIC_EXIT_PARAMETER_SHIFT 8 #define SWSCI_SCIC_EXIT_PARAMETER_MASK (0xff << 8) #define SWSCI_SCIC_EXIT_STATUS_SHIFT 5 #define SWSCI_SCIC_EXIT_STATUS_MASK (7 << 5) #define SWSCI_SCIC_EXIT_STATUS_SUCCESS 1 #define SWSCI_FUNCTION_CODE(main, sub) \ ((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \ (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT) /* SWSCI: Get BIOS Data (GBDA) */ #define SWSCI_GBDA 4 #define SWSCI_GBDA_SUPPORTED_CALLS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0) #define SWSCI_GBDA_REQUESTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1) #define SWSCI_GBDA_BOOT_DISPLAY_PREF SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4) #define SWSCI_GBDA_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5) #define SWSCI_GBDA_TV_STANDARD SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6) #define SWSCI_GBDA_INTERNAL_GRAPHICS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7) #define SWSCI_GBDA_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10) /* SWSCI: System BIOS Callbacks (SBCB) */ #define SWSCI_SBCB 6 #define SWSCI_SBCB_SUPPORTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0) #define SWSCI_SBCB_INIT_COMPLETION SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1) #define SWSCI_SBCB_PRE_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3) #define SWSCI_SBCB_POST_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4) #define SWSCI_SBCB_DISPLAY_SWITCH SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5) #define SWSCI_SBCB_SET_TV_FORMAT SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6) #define SWSCI_SBCB_ADAPTER_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7) #define SWSCI_SBCB_DISPLAY_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8) #define SWSCI_SBCB_SET_BOOT_DISPLAY SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9) #define SWSCI_SBCB_SET_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10) #define SWSCI_SBCB_SET_INTERNAL_GFX SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11) #define SWSCI_SBCB_POST_HIRES_TO_DOS_FS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16) #define SWSCI_SBCB_SUSPEND_RESUME SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17) #define SWSCI_SBCB_SET_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18) #define SWSCI_SBCB_POST_VBE_PM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19) #define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21) #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 int swsci(struct drm_device *dev, u32 function, u32 parm, u32 *parm_out) { struct drm_i915_private *dev_priv = dev->dev_private; struct opregion_swsci __iomem *swsci = dev_priv->opregion.swsci; u32 main_function, sub_function, scic; u16 pci_swsci; u32 dslp; if (!swsci) return -ENODEV; main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >> SWSCI_SCIC_MAIN_FUNCTION_SHIFT; sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >> SWSCI_SCIC_SUB_FUNCTION_SHIFT; /* Check if we can call the function. See swsci_setup for details. */ if (main_function == SWSCI_SBCB) { if ((dev_priv->opregion.swsci_sbcb_sub_functions & (1 << sub_function)) == 0) return -EINVAL; } else if (main_function == SWSCI_GBDA) { if ((dev_priv->opregion.swsci_gbda_sub_functions & (1 << sub_function)) == 0) return -EINVAL; } /* Driver sleep timeout in ms. */ dslp = ioread32(&swsci->dslp); if (!dslp) { dslp = 2; } else if (dslp > 500) { /* Hey bios, trust must be earned. */ WARN_ONCE(1, "excessive driver sleep timeout (DSPL) %u\n", dslp); dslp = 500; } /* The spec tells us to do this, but we are the only user... */ scic = ioread32(&swsci->scic); if (scic & SWSCI_SCIC_INDICATOR) { DRM_DEBUG_DRIVER("SWSCI request already in progress\n"); return -EBUSY; } scic = function | SWSCI_SCIC_INDICATOR; iowrite32(parm, &swsci->parm); iowrite32(scic, &swsci->scic); /* Ensure SCI event is selected and event trigger is cleared. */ pci_read_config_word(dev->pdev, PCI_SWSCI, &pci_swsci); if (!(pci_swsci & PCI_SWSCI_SCISEL) || (pci_swsci & PCI_SWSCI_GSSCIE)) { pci_swsci |= PCI_SWSCI_SCISEL; pci_swsci &= ~PCI_SWSCI_GSSCIE; pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci); } /* Use event trigger to tell bios to check the mail. */ pci_swsci |= PCI_SWSCI_GSSCIE; pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci); /* Poll for the result. */ #define C (((scic = ioread32(&swsci->scic)) & SWSCI_SCIC_INDICATOR) == 0) if (wait_for(C, dslp)) { DRM_DEBUG_DRIVER("SWSCI request timed out\n"); return -ETIMEDOUT; } scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >> SWSCI_SCIC_EXIT_STATUS_SHIFT; /* Note: scic == 0 is an error! */ if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) { DRM_DEBUG_DRIVER("SWSCI request error %u\n", scic); return -EIO; } if (parm_out) *parm_out = ioread32(&swsci->parm); return 0; #undef C } #define DISPLAY_TYPE_CRT 0 #define DISPLAY_TYPE_TV 1 #define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL 2 #define DISPLAY_TYPE_INTERNAL_FLAT_PANEL 3 int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder, bool enable) { struct drm_device *dev = intel_encoder->base.dev; u32 parm = 0; u32 type = 0; u32 port; /* don't care about old stuff for now */ if (!HAS_DDI(dev)) return 0; port = intel_ddi_get_encoder_port(intel_encoder); if (port == PORT_E) { port = 0; } else { parm |= 1 << port; port++; } if (!enable) parm |= 4 << 8; switch (intel_encoder->type) { case INTEL_OUTPUT_ANALOG: type = DISPLAY_TYPE_CRT; break; case INTEL_OUTPUT_UNKNOWN: case INTEL_OUTPUT_DISPLAYPORT: case INTEL_OUTPUT_HDMI: type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL; break; case INTEL_OUTPUT_EDP: type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL; break; default: WARN_ONCE(1, "unsupported intel_encoder type %d\n", intel_encoder->type); return -EINVAL; } parm |= type << (16 + port * 3); return swsci(dev, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL); } 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; 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; intel_panel_set_backlight(dev, bclp, 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 */ DRM_DEBUG_DRIVER("Illum is not supported\n"); return ASLE_ALS_ILLUM_FAILED; } static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb) { DRM_DEBUG_DRIVER("PWM freq is not supported\n"); return ASLE_PWM_FREQ_FAILED; } 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 */ DRM_DEBUG_DRIVER("Pfit is not supported\n"); return ASLE_PFIT_FAILED; } 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); } #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_dbg(&dev->pdev->dev, "More than 8 outputs detected via ACPI\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_dbg(&dev->pdev->dev, "More than 8 outputs in connector list\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) { iowrite32(ASLE_TCHE_BLC_EN, &opregion->asle->tche); iowrite32(ASLE_ARDY_READY, &opregion->asle->ardy); } } 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->asle) iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy); 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; } static void swsci_setup(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; struct intel_opregion *opregion = &dev_priv->opregion; bool requested_callbacks = false; u32 tmp; /* Sub-function code 0 is okay, let's allow them. */ opregion->swsci_gbda_sub_functions = 1; opregion->swsci_sbcb_sub_functions = 1; /* We use GBDA to ask for supported GBDA calls. */ if (swsci(dev, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) { /* make the bits match the sub-function codes */ tmp <<= 1; opregion->swsci_gbda_sub_functions |= tmp; } /* * We also use GBDA to ask for _requested_ SBCB callbacks. The driver * must not call interfaces that are not specifically requested by the * bios. */ if (swsci(dev, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) { /* here, the bits already match sub-function codes */ opregion->swsci_sbcb_sub_functions |= tmp; requested_callbacks = true; } /* * But we use SBCB to ask for _supported_ SBCB calls. This does not mean * the callback is _requested_. But we still can't call interfaces that * are not requested. */ if (swsci(dev, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) { /* make the bits match the sub-function codes */ u32 low = tmp & 0x7ff; u32 high = tmp & ~0xfff; /* bit 11 is reserved */ tmp = (high << 4) | (low << 1) | 1; /* best guess what to do with supported wrt requested */ if (requested_callbacks) { u32 req = opregion->swsci_sbcb_sub_functions; if ((req & tmp) != req) DRM_DEBUG_DRIVER("SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", req, tmp); /* XXX: for now, trust the requested callbacks */ /* opregion->swsci_sbcb_sub_functions &= tmp; */ } else { opregion->swsci_sbcb_sub_functions |= tmp; } } DRM_DEBUG_DRIVER("SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n", opregion->swsci_gbda_sub_functions, opregion->swsci_sbcb_sub_functions); } #else /* CONFIG_ACPI */ static inline void swsci_setup(struct drm_device *dev) {} #endif /* CONFIG_ACPI */ 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; swsci_setup(dev); } if (mboxes & MBOX_ASLE) { DRM_DEBUG_DRIVER("ASLE supported\n"); opregion->asle = base + OPREGION_ASLE_OFFSET; iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy); } return 0; err_out: iounmap(base); return err; }