--- /dev/null
+/*
+ * 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 <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 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];
+} __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];
+} __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 */
+ u8 rsvd[86];
+} __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 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 = 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) {
+ 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;
+
+ 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;
+}
Code Review / kvmfornfv.git / blobdiff