/* * 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. * */ #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) #define MBOX_ASLE_EXT (1<<4) 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; u32 driver_model; u32 pcon; u8 dver[32]; u8 rsvd[124]; } __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 */ u32 did2[7]; /* extended supported display devices ID list */ u32 cpd2[7]; /* extended attached display devices list */ u8 rsvd2[4]; } __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]; } __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 */ u32 cddv; /* color correction default values */ u32 pcft; /* power conservation features */ u32 srot; /* supported rotation angles */ u32 iuer; /* IUER events */ u64 fdss; u32 fdsp; u32 stat; u8 rsvd[70]; } __packed; /* Driver readiness indicator */ #define ASLE_ARDY_READY (1 << 0) #define ASLE_ARDY_NOT_READY (0 << 0) /* ASLE Interrupt Command (ASLC) bits */ #define ASLC_SET_ALS_ILLUM (1 << 0) #define ASLC_SET_BACKLIGHT (1 << 1) #define ASLC_SET_PFIT (1 << 2) #define ASLC_SET_PWM_FREQ (1 << 3) #define ASLC_SUPPORTED_ROTATION_ANGLES (1 << 4) #define ASLC_BUTTON_ARRAY (1 << 5) #define ASLC_CONVERTIBLE_INDICATOR (1 << 6) #define ASLC_DOCKING_INDICATOR (1 << 7) #define ASLC_ISCT_STATE_CHANGE (1 << 8) #define ASLC_REQ_MSK 0x1ff /* response bits */ #define ASLC_ALS_ILLUM_FAILED (1 << 10) #define ASLC_BACKLIGHT_FAILED (1 << 12) #define ASLC_PFIT_FAILED (1 << 14) #define ASLC_PWM_FREQ_FAILED (1 << 16) #define ASLC_ROTATION_ANGLES_FAILED (1 << 18) #define ASLC_BUTTON_ARRAY_FAILED (1 << 20) #define ASLC_CONVERTIBLE_FAILED (1 << 22) #define ASLC_DOCKING_FAILED (1 << 24) #define ASLC_ISCT_STATE_FAILED (1 << 26) /* 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) /* IUER */ #define ASLE_IUER_DOCKING (1 << 7) #define ASLE_IUER_CONVERTIBLE (1 << 6) #define ASLE_IUER_ROTATION_LOCK_BTN (1 << 4) #define ASLE_IUER_VOLUME_DOWN_BTN (1 << 3) #define ASLE_IUER_VOLUME_UP_BTN (1 << 2) #define ASLE_IUER_WINDOWS_BTN (1 << 1) #define ASLE_IUER_POWER_BTN (1 << 0) /* 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) #define MAX_DSLP 1500 #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) { /* The spec says 2ms should be the default, but it's too small * for some machines. */ dslp = 50; } else if (dslp > MAX_DSLP) { /* Hey bios, trust must be earned. */ DRM_INFO_ONCE("ACPI BIOS requests an excessive sleep of %u ms, " "using %u ms instead\n", dslp, MAX_DSLP); dslp = MAX_DSLP; } /* 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: case INTEL_OUTPUT_DP_MST: 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 const struct { pci_power_t pci_power_state; u32 parm; } power_state_map[] = { { PCI_D0, 0x00 }, { PCI_D1, 0x01 }, { PCI_D2, 0x02 }, { PCI_D3hot, 0x04 }, { PCI_D3cold, 0x04 }, }; int intel_opregion_notify_adapter(struct drm_device *dev, pci_power_t state) { int i; if (!HAS_DDI(dev)) return 0; for (i = 0; i < ARRAY_SIZE(power_state_map); i++) { if (state == power_state_map[i].pci_power_state) return swsci(dev, SWSCI_SBCB_ADAPTER_POWER_STATE, power_state_map[i].parm, NULL); } return -EINVAL; } /* * If the vendor backlight interface is not in use and ACPI backlight interface * is broken, do not bother processing backlight change requests from firmware. */ static bool should_ignore_backlight_request(void) { return acpi_video_backlight_support() && !acpi_video_verify_backlight_support(); } static u32 asle_set_backlight(struct drm_device *dev, u32 bclp) { struct drm_i915_private *dev_priv = dev->dev_private; struct intel_connector *intel_connector; struct opregion_asle __iomem *asle = dev_priv->opregion.asle; DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp); if (should_ignore_backlight_request()) { DRM_DEBUG_KMS("opregion backlight request ignored\n"); return 0; } if (!(bclp & ASLE_BCLP_VALID)) return ASLC_BACKLIGHT_FAILED; bclp &= ASLE_BCLP_MSK; if (bclp > 255) return ASLC_BACKLIGHT_FAILED; drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); /* * Update backlight on all connectors that support backlight (usually * only one). */ DRM_DEBUG_KMS("updating opregion backlight %d/255\n", bclp); list_for_each_entry(intel_connector, &dev->mode_config.connector_list, base.head) intel_panel_set_backlight_acpi(intel_connector, bclp, 255); iowrite32(DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID, &asle->cblv); drm_modeset_unlock(&dev->mode_config.connection_mutex); 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 ASLC_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 ASLC_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 ASLC_PFIT_FAILED; } static u32 asle_set_supported_rotation_angles(struct drm_device *dev, u32 srot) { DRM_DEBUG_DRIVER("SROT is not supported\n"); return ASLC_ROTATION_ANGLES_FAILED; } static u32 asle_set_button_array(struct drm_device *dev, u32 iuer) { if (!iuer) DRM_DEBUG_DRIVER("Button array event is not supported (nothing)\n"); if (iuer & ASLE_IUER_ROTATION_LOCK_BTN) DRM_DEBUG_DRIVER("Button array event is not supported (rotation lock)\n"); if (iuer & ASLE_IUER_VOLUME_DOWN_BTN) DRM_DEBUG_DRIVER("Button array event is not supported (volume down)\n"); if (iuer & ASLE_IUER_VOLUME_UP_BTN) DRM_DEBUG_DRIVER("Button array event is not supported (volume up)\n"); if (iuer & ASLE_IUER_WINDOWS_BTN) DRM_DEBUG_DRIVER("Button array event is not supported (windows)\n"); if (iuer & ASLE_IUER_POWER_BTN) DRM_DEBUG_DRIVER("Button array event is not supported (power)\n"); return ASLC_BUTTON_ARRAY_FAILED; } static u32 asle_set_convertible(struct drm_device *dev, u32 iuer) { if (iuer & ASLE_IUER_CONVERTIBLE) DRM_DEBUG_DRIVER("Convertible is not supported (clamshell)\n"); else DRM_DEBUG_DRIVER("Convertible is not supported (slate)\n"); return ASLC_CONVERTIBLE_FAILED; } static u32 asle_set_docking(struct drm_device *dev, u32 iuer) { if (iuer & ASLE_IUER_DOCKING) DRM_DEBUG_DRIVER("Docking is not supported (docked)\n"); else DRM_DEBUG_DRIVER("Docking is not supported (undocked)\n"); return ASLC_DOCKING_FAILED; } static u32 asle_isct_state(struct drm_device *dev) { DRM_DEBUG_DRIVER("ISCT is not supported\n"); return ASLC_ISCT_STATE_FAILED; } static void asle_work(struct work_struct *work) { struct intel_opregion *opregion = container_of(work, struct intel_opregion, asle_work); struct drm_i915_private *dev_priv = container_of(opregion, struct drm_i915_private, opregion); struct drm_device *dev = dev_priv->dev; struct opregion_asle __iomem *asle = dev_priv->opregion.asle; u32 aslc_stat = 0; u32 aslc_req; if (!asle) return; aslc_req = ioread32(&asle->aslc); if (!(aslc_req & ASLC_REQ_MSK)) { DRM_DEBUG_DRIVER("No request on ASLC interrupt 0x%08x\n", aslc_req); return; } if (aslc_req & ASLC_SET_ALS_ILLUM) aslc_stat |= asle_set_als_illum(dev, ioread32(&asle->alsi)); if (aslc_req & ASLC_SET_BACKLIGHT) aslc_stat |= asle_set_backlight(dev, ioread32(&asle->bclp)); if (aslc_req & ASLC_SET_PFIT) aslc_stat |= asle_set_pfit(dev, ioread32(&asle->pfit)); if (aslc_req & ASLC_SET_PWM_FREQ) aslc_stat |= asle_set_pwm_freq(dev, ioread32(&asle->pfmb)); if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES) aslc_stat |= asle_set_supported_rotation_angles(dev, ioread32(&asle->srot)); if (aslc_req & ASLC_BUTTON_ARRAY) aslc_stat |= asle_set_button_array(dev, ioread32(&asle->iuer)); if (aslc_req & ASLC_CONVERTIBLE_INDICATOR) aslc_stat |= asle_set_convertible(dev, ioread32(&asle->iuer)); if (aslc_req & ASLC_DOCKING_INDICATOR) aslc_stat |= asle_set_docking(dev, ioread32(&asle->iuer)); if (aslc_req & ASLC_ISCT_STATE_CHANGE) aslc_stat |= asle_isct_state(dev); iowrite32(aslc_stat, &asle->aslc); } void intel_opregion_asle_intr(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; if (dev_priv->opregion.asle) schedule_work(&dev_priv->opregion.asle_work); } #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 u32 get_did(struct intel_opregion *opregion, int i) { u32 did; if (i < ARRAY_SIZE(opregion->acpi->didl)) { did = ioread32(&opregion->acpi->didl[i]); } else { i -= ARRAY_SIZE(opregion->acpi->didl); if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2))) return 0; did = ioread32(&opregion->acpi->did2[i]); } return did; } static void set_did(struct intel_opregion *opregion, int i, u32 val) { if (i < ARRAY_SIZE(opregion->acpi->didl)) { iowrite32(val, &opregion->acpi->didl[i]); } else { i -= ARRAY_SIZE(opregion->acpi->didl); if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2))) return; iowrite32(val, &opregion->acpi->did2[i]); } } 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, max_outputs; int i = 0; handle = 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) { DRM_ERROR("No ACPI video bus found\n"); return; } /* * In theory, did2, the extended didl, gets added at opregion version * 3.0. In practice, however, we're supposed to set it for earlier * versions as well, since a BIOS that doesn't understand did2 should * not look at it anyway. Use a variable so we can tweak this if a need * arises later. */ max_outputs = ARRAY_SIZE(opregion->acpi->didl) + ARRAY_SIZE(opregion->acpi->did2); list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) { if (i >= max_outputs) { DRM_DEBUG_KMS("More than %u outputs detected via ACPI\n", max_outputs); return; } status = acpi_evaluate_integer(acpi_cdev->handle, "_ADR", NULL, &device_id); if (ACPI_SUCCESS(status)) { if (!device_id) goto blind_set; set_did(opregion, i++, (u32)(device_id & 0x0f0f)); } } end: DRM_DEBUG_KMS("%d outputs detected\n", i); /* If fewer than max outputs, the list must be null terminated */ if (i < max_outputs) set_did(opregion, 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 >= max_outputs) { DRM_DEBUG_KMS("More than %u outputs in connector list\n", max_outputs); 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 = get_did(opregion, i); set_did(opregion, i, temp | (1 << 31) | output_type | 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 = get_did(opregion, 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) { 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); cancel_work_sync(&dev_priv->opregion.asle_work); 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; opregion->lid_state = 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; BUILD_BUG_ON(sizeof(struct opregion_header) != 0x100); BUILD_BUG_ON(sizeof(struct opregion_acpi) != 0x100); BUILD_BUG_ON(sizeof(struct opregion_swsci) != 0x100); BUILD_BUG_ON(sizeof(struct opregion_asle) != 0x100); 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; } #ifdef CONFIG_ACPI INIT_WORK(&opregion->asle_work, asle_work); #endif 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; }