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  1. /*
  2.  * Copyright 2008 Intel Corporation <hong.liu@intel.com>
  3.  * Copyright 2008 Red Hat <mjg@redhat.com>
  4.  *
  5.  * Permission is hereby granted, free of charge, to any person obtaining
  6.  * a copy of this software and associated documentation files (the
  7.  * "Software"), to deal in the Software without restriction, including
  8.  * without limitation the rights to use, copy, modify, merge, publish,
  9.  * distribute, sub license, and/or sell copies of the Software, and to
  10.  * permit persons to whom the Software is furnished to do so, subject to
  11.  * the following conditions:
  12.  *
  13.  * The above copyright notice and this permission notice (including the
  14.  * next paragraph) shall be included in all copies or substantial
  15.  * portions of the Software.
  16.  *
  17.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18.  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19.  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  20.  * NON-INFRINGEMENT.  IN NO EVENT SHALL INTEL AND/OR ITS SUPPLIERS BE
  21.  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  22.  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  23.  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  24.  * SOFTWARE.
  25.  *
  26.  */
  27.  
  28. #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  29.  
  30. #include <linux/acpi.h>
  31. #include <acpi/video.h>
  32.  
  33. #include <drm/drmP.h>
  34. #include <drm/i915_drm.h>
  35. #include "i915_drv.h"
  36. #include "intel_drv.h"
  37.  
  38. #define PCI_ASLE 0xe4
  39. #define PCI_ASLS 0xfc
  40. #define PCI_SWSCI               0xe8
  41. #define PCI_SWSCI_SCISEL        (1 << 15)
  42. #define PCI_SWSCI_GSSCIE        (1 << 0)
  43.  
  44. #define OPREGION_HEADER_OFFSET 0
  45. #define OPREGION_ACPI_OFFSET   0x100
  46. #define   ACPI_CLID 0x01ac /* current lid state indicator */
  47. #define   ACPI_CDCK 0x01b0 /* current docking state indicator */
  48. #define OPREGION_SWSCI_OFFSET  0x200
  49. #define OPREGION_ASLE_OFFSET   0x300
  50. #define OPREGION_VBT_OFFSET    0x400
  51.  
  52. #define OPREGION_SIGNATURE "IntelGraphicsMem"
  53. #define MBOX_ACPI      (1<<0)
  54. #define MBOX_SWSCI     (1<<1)
  55. #define MBOX_ASLE      (1<<2)
  56.  
  57. struct opregion_header {
  58.        u8 signature[16];
  59.        u32 size;
  60.        u32 opregion_ver;
  61.        u8 bios_ver[32];
  62.        u8 vbios_ver[16];
  63.        u8 driver_ver[16];
  64.        u32 mboxes;
  65.        u8 reserved[164];
  66. } __packed;
  67.  
  68. /* OpRegion mailbox #1: public ACPI methods */
  69. struct opregion_acpi {
  70.        u32 drdy;       /* driver readiness */
  71.        u32 csts;       /* notification status */
  72.        u32 cevt;       /* current event */
  73.        u8 rsvd1[20];
  74.        u32 didl[8];    /* supported display devices ID list */
  75.        u32 cpdl[8];    /* currently presented display list */
  76.        u32 cadl[8];    /* currently active display list */
  77.        u32 nadl[8];    /* next active devices list */
  78.        u32 aslp;       /* ASL sleep time-out */
  79.        u32 tidx;       /* toggle table index */
  80.        u32 chpd;       /* current hotplug enable indicator */
  81.        u32 clid;       /* current lid state*/
  82.        u32 cdck;       /* current docking state */
  83.        u32 sxsw;       /* Sx state resume */
  84.        u32 evts;       /* ASL supported events */
  85.        u32 cnot;       /* current OS notification */
  86.        u32 nrdy;       /* driver status */
  87.        u8 rsvd2[60];
  88. } __packed;
  89.  
  90. /* OpRegion mailbox #2: SWSCI */
  91. struct opregion_swsci {
  92.        u32 scic;       /* SWSCI command|status|data */
  93.        u32 parm;       /* command parameters */
  94.        u32 dslp;       /* driver sleep time-out */
  95.        u8 rsvd[244];
  96. } __packed;
  97.  
  98. /* OpRegion mailbox #3: ASLE */
  99. struct opregion_asle {
  100.        u32 ardy;       /* driver readiness */
  101.        u32 aslc;       /* ASLE interrupt command */
  102.        u32 tche;       /* technology enabled indicator */
  103.        u32 alsi;       /* current ALS illuminance reading */
  104.        u32 bclp;       /* backlight brightness to set */
  105.        u32 pfit;       /* panel fitting state */
  106.        u32 cblv;       /* current brightness level */
  107.        u16 bclm[20];   /* backlight level duty cycle mapping table */
  108.        u32 cpfm;       /* current panel fitting mode */
  109.        u32 epfm;       /* enabled panel fitting modes */
  110.        u8 plut[74];    /* panel LUT and identifier */
  111.        u32 pfmb;       /* PWM freq and min brightness */
  112.         u32 cddv;       /* color correction default values */
  113.         u32 pcft;       /* power conservation features */
  114.         u32 srot;       /* supported rotation angles */
  115.         u32 iuer;       /* IUER events */
  116.         u8 rsvd[86];
  117. } __packed;
  118.  
  119. /* Driver readiness indicator */
  120. #define ASLE_ARDY_READY         (1 << 0)
  121. #define ASLE_ARDY_NOT_READY     (0 << 0)
  122.  
  123. /* ASLE Interrupt Command (ASLC) bits */
  124. #define ASLC_SET_ALS_ILLUM              (1 << 0)
  125. #define ASLC_SET_BACKLIGHT              (1 << 1)
  126. #define ASLC_SET_PFIT                   (1 << 2)
  127. #define ASLC_SET_PWM_FREQ               (1 << 3)
  128. #define ASLC_SUPPORTED_ROTATION_ANGLES  (1 << 4)
  129. #define ASLC_BUTTON_ARRAY               (1 << 5)
  130. #define ASLC_CONVERTIBLE_INDICATOR      (1 << 6)
  131. #define ASLC_DOCKING_INDICATOR          (1 << 7)
  132. #define ASLC_ISCT_STATE_CHANGE          (1 << 8)
  133. #define ASLC_REQ_MSK                    0x1ff
  134. /* response bits */
  135. #define ASLC_ALS_ILLUM_FAILED           (1 << 10)
  136. #define ASLC_BACKLIGHT_FAILED           (1 << 12)
  137. #define ASLC_PFIT_FAILED                (1 << 14)
  138. #define ASLC_PWM_FREQ_FAILED            (1 << 16)
  139. #define ASLC_ROTATION_ANGLES_FAILED     (1 << 18)
  140. #define ASLC_BUTTON_ARRAY_FAILED        (1 << 20)
  141. #define ASLC_CONVERTIBLE_FAILED         (1 << 22)
  142. #define ASLC_DOCKING_FAILED             (1 << 24)
  143. #define ASLC_ISCT_STATE_FAILED          (1 << 26)
  144.  
  145. /* Technology enabled indicator */
  146. #define ASLE_TCHE_ALS_EN        (1 << 0)
  147. #define ASLE_TCHE_BLC_EN        (1 << 1)
  148. #define ASLE_TCHE_PFIT_EN       (1 << 2)
  149. #define ASLE_TCHE_PFMB_EN       (1 << 3)
  150.  
  151. /* ASLE backlight brightness to set */
  152. #define ASLE_BCLP_VALID                (1<<31)
  153. #define ASLE_BCLP_MSK          (~(1<<31))
  154.  
  155. /* ASLE panel fitting request */
  156. #define ASLE_PFIT_VALID         (1<<31)
  157. #define ASLE_PFIT_CENTER (1<<0)
  158. #define ASLE_PFIT_STRETCH_TEXT (1<<1)
  159. #define ASLE_PFIT_STRETCH_GFX (1<<2)
  160.  
  161. /* PWM frequency and minimum brightness */
  162. #define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
  163. #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
  164. #define ASLE_PFMB_PWM_MASK (0x7ffffe00)
  165. #define ASLE_PFMB_PWM_VALID (1<<31)
  166.  
  167. #define ASLE_CBLV_VALID         (1<<31)
  168.  
  169. /* IUER */
  170. #define ASLE_IUER_DOCKING               (1 << 7)
  171. #define ASLE_IUER_CONVERTIBLE           (1 << 6)
  172. #define ASLE_IUER_ROTATION_LOCK_BTN     (1 << 4)
  173. #define ASLE_IUER_VOLUME_DOWN_BTN       (1 << 3)
  174. #define ASLE_IUER_VOLUME_UP_BTN         (1 << 2)
  175. #define ASLE_IUER_WINDOWS_BTN           (1 << 1)
  176. #define ASLE_IUER_POWER_BTN             (1 << 0)
  177.  
  178. /* Software System Control Interrupt (SWSCI) */
  179. #define SWSCI_SCIC_INDICATOR            (1 << 0)
  180. #define SWSCI_SCIC_MAIN_FUNCTION_SHIFT  1
  181. #define SWSCI_SCIC_MAIN_FUNCTION_MASK   (0xf << 1)
  182. #define SWSCI_SCIC_SUB_FUNCTION_SHIFT   8
  183. #define SWSCI_SCIC_SUB_FUNCTION_MASK    (0xff << 8)
  184. #define SWSCI_SCIC_EXIT_PARAMETER_SHIFT 8
  185. #define SWSCI_SCIC_EXIT_PARAMETER_MASK  (0xff << 8)
  186. #define SWSCI_SCIC_EXIT_STATUS_SHIFT    5
  187. #define SWSCI_SCIC_EXIT_STATUS_MASK     (7 << 5)
  188. #define SWSCI_SCIC_EXIT_STATUS_SUCCESS  1
  189.  
  190. #define SWSCI_FUNCTION_CODE(main, sub) \
  191.         ((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \
  192.          (sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT)
  193.  
  194. /* SWSCI: Get BIOS Data (GBDA) */
  195. #define SWSCI_GBDA                      4
  196. #define SWSCI_GBDA_SUPPORTED_CALLS      SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0)
  197. #define SWSCI_GBDA_REQUESTED_CALLBACKS  SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1)
  198. #define SWSCI_GBDA_BOOT_DISPLAY_PREF    SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4)
  199. #define SWSCI_GBDA_PANEL_DETAILS        SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5)
  200. #define SWSCI_GBDA_TV_STANDARD          SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6)
  201. #define SWSCI_GBDA_INTERNAL_GRAPHICS    SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7)
  202. #define SWSCI_GBDA_SPREAD_SPECTRUM      SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10)
  203.  
  204. /* SWSCI: System BIOS Callbacks (SBCB) */
  205. #define SWSCI_SBCB                      6
  206. #define SWSCI_SBCB_SUPPORTED_CALLBACKS  SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0)
  207. #define SWSCI_SBCB_INIT_COMPLETION      SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1)
  208. #define SWSCI_SBCB_PRE_HIRES_SET_MODE   SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3)
  209. #define SWSCI_SBCB_POST_HIRES_SET_MODE  SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4)
  210. #define SWSCI_SBCB_DISPLAY_SWITCH       SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5)
  211. #define SWSCI_SBCB_SET_TV_FORMAT        SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6)
  212. #define SWSCI_SBCB_ADAPTER_POWER_STATE  SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7)
  213. #define SWSCI_SBCB_DISPLAY_POWER_STATE  SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8)
  214. #define SWSCI_SBCB_SET_BOOT_DISPLAY     SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9)
  215. #define SWSCI_SBCB_SET_PANEL_DETAILS    SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10)
  216. #define SWSCI_SBCB_SET_INTERNAL_GFX     SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11)
  217. #define SWSCI_SBCB_POST_HIRES_TO_DOS_FS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16)
  218. #define SWSCI_SBCB_SUSPEND_RESUME       SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17)
  219. #define SWSCI_SBCB_SET_SPREAD_SPECTRUM  SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18)
  220. #define SWSCI_SBCB_POST_VBE_PM          SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19)
  221. #define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21)
  222.  
  223. #define ACPI_OTHER_OUTPUT (0<<8)
  224. #define ACPI_VGA_OUTPUT (1<<8)
  225. #define ACPI_TV_OUTPUT (2<<8)
  226. #define ACPI_DIGITAL_OUTPUT (3<<8)
  227. #define ACPI_LVDS_OUTPUT (4<<8)
  228.  
  229. #define MAX_DSLP        1500
  230.  
  231. #ifdef CONFIG_ACPI
  232. static int swsci(struct drm_device *dev, u32 function, u32 parm, u32 *parm_out)
  233. {
  234.         struct drm_i915_private *dev_priv = dev->dev_private;
  235.         struct opregion_swsci __iomem *swsci = dev_priv->opregion.swsci;
  236.         u32 main_function, sub_function, scic;
  237.         u16 pci_swsci;
  238.         u32 dslp;
  239.  
  240.         if (!swsci)
  241.                 return -ENODEV;
  242.  
  243.         main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >>
  244.                 SWSCI_SCIC_MAIN_FUNCTION_SHIFT;
  245.         sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >>
  246.                 SWSCI_SCIC_SUB_FUNCTION_SHIFT;
  247.  
  248.         /* Check if we can call the function. See swsci_setup for details. */
  249.         if (main_function == SWSCI_SBCB) {
  250.                 if ((dev_priv->opregion.swsci_sbcb_sub_functions &
  251.                      (1 << sub_function)) == 0)
  252.                         return -EINVAL;
  253.         } else if (main_function == SWSCI_GBDA) {
  254.                 if ((dev_priv->opregion.swsci_gbda_sub_functions &
  255.                      (1 << sub_function)) == 0)
  256.                         return -EINVAL;
  257.         }
  258.  
  259.         /* Driver sleep timeout in ms. */
  260.         dslp = ioread32(&swsci->dslp);
  261.         if (!dslp) {
  262.                 /* The spec says 2ms should be the default, but it's too small
  263.                  * for some machines. */
  264.                 dslp = 50;
  265.         } else if (dslp > MAX_DSLP) {
  266.                 /* Hey bios, trust must be earned. */
  267.                 DRM_INFO_ONCE("ACPI BIOS requests an excessive sleep of %u ms, "
  268.                               "using %u ms instead\n", dslp, MAX_DSLP);
  269.                 dslp = MAX_DSLP;
  270.         }
  271.  
  272.         /* The spec tells us to do this, but we are the only user... */
  273.         scic = ioread32(&swsci->scic);
  274.         if (scic & SWSCI_SCIC_INDICATOR) {
  275.                 DRM_DEBUG_DRIVER("SWSCI request already in progress\n");
  276.                 return -EBUSY;
  277.         }
  278.  
  279.         scic = function | SWSCI_SCIC_INDICATOR;
  280.  
  281.         iowrite32(parm, &swsci->parm);
  282.         iowrite32(scic, &swsci->scic);
  283.  
  284.         /* Ensure SCI event is selected and event trigger is cleared. */
  285.         pci_read_config_word(dev->pdev, PCI_SWSCI, &pci_swsci);
  286.         if (!(pci_swsci & PCI_SWSCI_SCISEL) || (pci_swsci & PCI_SWSCI_GSSCIE)) {
  287.                 pci_swsci |= PCI_SWSCI_SCISEL;
  288.                 pci_swsci &= ~PCI_SWSCI_GSSCIE;
  289.                 pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
  290.         }
  291.  
  292.         /* Use event trigger to tell bios to check the mail. */
  293.         pci_swsci |= PCI_SWSCI_GSSCIE;
  294.         pci_write_config_word(dev->pdev, PCI_SWSCI, pci_swsci);
  295.  
  296.         /* Poll for the result. */
  297. #define C (((scic = ioread32(&swsci->scic)) & SWSCI_SCIC_INDICATOR) == 0)
  298.         if (wait_for(C, dslp)) {
  299.                 DRM_DEBUG_DRIVER("SWSCI request timed out\n");
  300.                 return -ETIMEDOUT;
  301.         }
  302.  
  303.         scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >>
  304.                 SWSCI_SCIC_EXIT_STATUS_SHIFT;
  305.  
  306.         /* Note: scic == 0 is an error! */
  307.         if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) {
  308.                 DRM_DEBUG_DRIVER("SWSCI request error %u\n", scic);
  309.                 return -EIO;
  310.         }
  311.  
  312.         if (parm_out)
  313.                 *parm_out = ioread32(&swsci->parm);
  314.  
  315.         return 0;
  316.  
  317. #undef C
  318. }
  319.  
  320. #define DISPLAY_TYPE_CRT                        0
  321. #define DISPLAY_TYPE_TV                         1
  322. #define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL        2
  323. #define DISPLAY_TYPE_INTERNAL_FLAT_PANEL        3
  324.  
  325. int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder,
  326.                                   bool enable)
  327. {
  328.         struct drm_device *dev = intel_encoder->base.dev;
  329.         u32 parm = 0;
  330.         u32 type = 0;
  331.         u32 port;
  332.  
  333.         /* don't care about old stuff for now */
  334.         if (!HAS_DDI(dev))
  335.                 return 0;
  336.  
  337.         port = intel_ddi_get_encoder_port(intel_encoder);
  338.         if (port == PORT_E) {
  339.                 port = 0;
  340.         } else {
  341.                 parm |= 1 << port;
  342.                 port++;
  343.         }
  344.  
  345.         if (!enable)
  346.                 parm |= 4 << 8;
  347.  
  348.         switch (intel_encoder->type) {
  349.         case INTEL_OUTPUT_ANALOG:
  350.                 type = DISPLAY_TYPE_CRT;
  351.                 break;
  352.         case INTEL_OUTPUT_UNKNOWN:
  353.         case INTEL_OUTPUT_DISPLAYPORT:
  354.         case INTEL_OUTPUT_HDMI:
  355.         case INTEL_OUTPUT_DP_MST:
  356.                 type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL;
  357.                 break;
  358.         case INTEL_OUTPUT_EDP:
  359.                 type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL;
  360.                 break;
  361.         default:
  362.                 WARN_ONCE(1, "unsupported intel_encoder type %d\n",
  363.                           intel_encoder->type);
  364.                 return -EINVAL;
  365.         }
  366.  
  367.         parm |= type << (16 + port * 3);
  368.  
  369.         return swsci(dev, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL);
  370. }
  371.  
  372. static const struct {
  373.         pci_power_t pci_power_state;
  374.         u32 parm;
  375. } power_state_map[] = {
  376.         { PCI_D0,       0x00 },
  377.         { PCI_D1,       0x01 },
  378.         { PCI_D2,       0x02 },
  379.         { PCI_D3hot,    0x04 },
  380.         { PCI_D3cold,   0x04 },
  381. };
  382.  
  383. int intel_opregion_notify_adapter(struct drm_device *dev, pci_power_t state)
  384. {
  385.         int i;
  386.  
  387.         if (!HAS_DDI(dev))
  388.                 return 0;
  389.  
  390.         for (i = 0; i < ARRAY_SIZE(power_state_map); i++) {
  391.                 if (state == power_state_map[i].pci_power_state)
  392.                         return swsci(dev, SWSCI_SBCB_ADAPTER_POWER_STATE,
  393.                                      power_state_map[i].parm, NULL);
  394.         }
  395.  
  396.         return -EINVAL;
  397. }
  398.  
  399. static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
  400. {
  401.         struct drm_i915_private *dev_priv = dev->dev_private;
  402.         struct intel_connector *intel_connector;
  403.         struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
  404.  
  405.         DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
  406.  
  407.         /*
  408.          * If the acpi_video interface is not supposed to be used, don't
  409.          * bother processing backlight level change requests from firmware.
  410.          */
  411.         if (!acpi_video_verify_backlight_support()) {
  412.                 DRM_DEBUG_KMS("opregion backlight request ignored\n");
  413.                 return 0;
  414.         }
  415.  
  416.         if (!(bclp & ASLE_BCLP_VALID))
  417.                 return ASLC_BACKLIGHT_FAILED;
  418.  
  419.         bclp &= ASLE_BCLP_MSK;
  420.         if (bclp > 255)
  421.                 return ASLC_BACKLIGHT_FAILED;
  422.  
  423.         drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
  424.  
  425.         /*
  426.          * Update backlight on all connectors that support backlight (usually
  427.          * only one).
  428.          */
  429.         DRM_DEBUG_KMS("updating opregion backlight %d/255\n", bclp);
  430.         list_for_each_entry(intel_connector, &dev->mode_config.connector_list, base.head)
  431.                 intel_panel_set_backlight_acpi(intel_connector, bclp, 255);
  432.         iowrite32(DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID, &asle->cblv);
  433.  
  434.         drm_modeset_unlock(&dev->mode_config.connection_mutex);
  435.  
  436.  
  437.         return 0;
  438. }
  439.  
  440. static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
  441. {
  442.         /* alsi is the current ALS reading in lux. 0 indicates below sensor
  443.            range, 0xffff indicates above sensor range. 1-0xfffe are valid */
  444.         DRM_DEBUG_DRIVER("Illum is not supported\n");
  445.         return ASLC_ALS_ILLUM_FAILED;
  446. }
  447.  
  448. static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
  449. {
  450.         DRM_DEBUG_DRIVER("PWM freq is not supported\n");
  451.         return ASLC_PWM_FREQ_FAILED;
  452. }
  453.  
  454. static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
  455. {
  456.         /* Panel fitting is currently controlled by the X code, so this is a
  457.            noop until modesetting support works fully */
  458.         DRM_DEBUG_DRIVER("Pfit is not supported\n");
  459.         return ASLC_PFIT_FAILED;
  460. }
  461.  
  462. static u32 asle_set_supported_rotation_angles(struct drm_device *dev, u32 srot)
  463. {
  464.         DRM_DEBUG_DRIVER("SROT is not supported\n");
  465.         return ASLC_ROTATION_ANGLES_FAILED;
  466. }
  467.  
  468. static u32 asle_set_button_array(struct drm_device *dev, u32 iuer)
  469. {
  470.         if (!iuer)
  471.                 DRM_DEBUG_DRIVER("Button array event is not supported (nothing)\n");
  472.         if (iuer & ASLE_IUER_ROTATION_LOCK_BTN)
  473.                 DRM_DEBUG_DRIVER("Button array event is not supported (rotation lock)\n");
  474.         if (iuer & ASLE_IUER_VOLUME_DOWN_BTN)
  475.                 DRM_DEBUG_DRIVER("Button array event is not supported (volume down)\n");
  476.         if (iuer & ASLE_IUER_VOLUME_UP_BTN)
  477.                 DRM_DEBUG_DRIVER("Button array event is not supported (volume up)\n");
  478.         if (iuer & ASLE_IUER_WINDOWS_BTN)
  479.                 DRM_DEBUG_DRIVER("Button array event is not supported (windows)\n");
  480.         if (iuer & ASLE_IUER_POWER_BTN)
  481.                 DRM_DEBUG_DRIVER("Button array event is not supported (power)\n");
  482.  
  483.         return ASLC_BUTTON_ARRAY_FAILED;
  484. }
  485.  
  486. static u32 asle_set_convertible(struct drm_device *dev, u32 iuer)
  487. {
  488.         if (iuer & ASLE_IUER_CONVERTIBLE)
  489.                 DRM_DEBUG_DRIVER("Convertible is not supported (clamshell)\n");
  490.         else
  491.                 DRM_DEBUG_DRIVER("Convertible is not supported (slate)\n");
  492.  
  493.         return ASLC_CONVERTIBLE_FAILED;
  494. }
  495.  
  496. static u32 asle_set_docking(struct drm_device *dev, u32 iuer)
  497. {
  498.         if (iuer & ASLE_IUER_DOCKING)
  499.                 DRM_DEBUG_DRIVER("Docking is not supported (docked)\n");
  500.         else
  501.                 DRM_DEBUG_DRIVER("Docking is not supported (undocked)\n");
  502.  
  503.         return ASLC_DOCKING_FAILED;
  504. }
  505.  
  506. static u32 asle_isct_state(struct drm_device *dev)
  507. {
  508.         DRM_DEBUG_DRIVER("ISCT is not supported\n");
  509.         return ASLC_ISCT_STATE_FAILED;
  510. }
  511.  
  512. static void asle_work(struct work_struct *work)
  513. {
  514.         struct intel_opregion *opregion =
  515.                 container_of(work, struct intel_opregion, asle_work);
  516.         struct drm_i915_private *dev_priv =
  517.                 container_of(opregion, struct drm_i915_private, opregion);
  518.         struct drm_device *dev = dev_priv->dev;
  519.         struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
  520.         u32 aslc_stat = 0;
  521.         u32 aslc_req;
  522.  
  523.         if (!asle)
  524.                 return;
  525.  
  526.         aslc_req = ioread32(&asle->aslc);
  527.  
  528.         if (!(aslc_req & ASLC_REQ_MSK)) {
  529.                 DRM_DEBUG_DRIVER("No request on ASLC interrupt 0x%08x\n",
  530.                                  aslc_req);
  531.                 return;
  532.         }
  533.  
  534.         if (aslc_req & ASLC_SET_ALS_ILLUM)
  535.                 aslc_stat |= asle_set_als_illum(dev, ioread32(&asle->alsi));
  536.  
  537.         if (aslc_req & ASLC_SET_BACKLIGHT)
  538.                 aslc_stat |= asle_set_backlight(dev, ioread32(&asle->bclp));
  539.  
  540.         if (aslc_req & ASLC_SET_PFIT)
  541.                 aslc_stat |= asle_set_pfit(dev, ioread32(&asle->pfit));
  542.  
  543.         if (aslc_req & ASLC_SET_PWM_FREQ)
  544.                 aslc_stat |= asle_set_pwm_freq(dev, ioread32(&asle->pfmb));
  545.  
  546.         if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES)
  547.                 aslc_stat |= asle_set_supported_rotation_angles(dev,
  548.                                                         ioread32(&asle->srot));
  549.  
  550.         if (aslc_req & ASLC_BUTTON_ARRAY)
  551.                 aslc_stat |= asle_set_button_array(dev, ioread32(&asle->iuer));
  552.  
  553.         if (aslc_req & ASLC_CONVERTIBLE_INDICATOR)
  554.                 aslc_stat |= asle_set_convertible(dev, ioread32(&asle->iuer));
  555.  
  556.         if (aslc_req & ASLC_DOCKING_INDICATOR)
  557.                 aslc_stat |= asle_set_docking(dev, ioread32(&asle->iuer));
  558.  
  559.         if (aslc_req & ASLC_ISCT_STATE_CHANGE)
  560.                 aslc_stat |= asle_isct_state(dev);
  561.  
  562.         iowrite32(aslc_stat, &asle->aslc);
  563. }
  564.  
  565. void intel_opregion_asle_intr(struct drm_device *dev)
  566. {
  567.         struct drm_i915_private *dev_priv = dev->dev_private;
  568.  
  569.         if (dev_priv->opregion.asle)
  570.                 schedule_work(&dev_priv->opregion.asle_work);
  571. }
  572.  
  573. #define ACPI_EV_DISPLAY_SWITCH (1<<0)
  574. #define ACPI_EV_LID            (1<<1)
  575. #define ACPI_EV_DOCK           (1<<2)
  576.  
  577. static struct intel_opregion *system_opregion;
  578.  
  579. static int intel_opregion_video_event(struct notifier_block *nb,
  580.                                       unsigned long val, void *data)
  581. {
  582.         /* The only video events relevant to opregion are 0x80. These indicate
  583.            either a docking event, lid switch or display switch request. In
  584.            Linux, these are handled by the dock, button and video drivers.
  585.         */
  586.  
  587.         struct opregion_acpi __iomem *acpi;
  588.         struct acpi_bus_event *event = data;
  589.         int ret = NOTIFY_OK;
  590.  
  591.         if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
  592.                 return NOTIFY_DONE;
  593.  
  594.         if (!system_opregion)
  595.                 return NOTIFY_DONE;
  596.  
  597.         acpi = system_opregion->acpi;
  598.  
  599.         if (event->type == 0x80 &&
  600.             (ioread32(&acpi->cevt) & 1) == 0)
  601.                 ret = NOTIFY_BAD;
  602.  
  603.         iowrite32(0, &acpi->csts);
  604.  
  605.         return ret;
  606. }
  607.  
  608. static struct notifier_block intel_opregion_notifier = {
  609.         .notifier_call = intel_opregion_video_event,
  610. };
  611.  
  612. /*
  613.  * Initialise the DIDL field in opregion. This passes a list of devices to
  614.  * the firmware. Values are defined by section B.4.2 of the ACPI specification
  615.  * (version 3)
  616.  */
  617.  
  618. static void intel_didl_outputs(struct drm_device *dev)
  619. {
  620.         struct drm_i915_private *dev_priv = dev->dev_private;
  621.         struct intel_opregion *opregion = &dev_priv->opregion;
  622.         struct drm_connector *connector;
  623.         acpi_handle handle;
  624.         struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL;
  625.         unsigned long long device_id;
  626.         acpi_status status;
  627.         u32 temp;
  628.         int i = 0;
  629.  
  630.         handle = ACPI_HANDLE(&dev->pdev->dev);
  631.         if (!handle || acpi_bus_get_device(handle, &acpi_dev))
  632.                 return;
  633.  
  634.         if (acpi_is_video_device(handle))
  635.                 acpi_video_bus = acpi_dev;
  636.         else {
  637.                 list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
  638.                         if (acpi_is_video_device(acpi_cdev->handle)) {
  639.                                 acpi_video_bus = acpi_cdev;
  640.                                 break;
  641.                         }
  642.                 }
  643.         }
  644.  
  645.         if (!acpi_video_bus) {
  646.                 pr_warn("No ACPI video bus found\n");
  647.                 return;
  648.         }
  649.  
  650.         list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
  651.                 if (i >= 8) {
  652.                         dev_dbg(&dev->pdev->dev,
  653.                                 "More than 8 outputs detected via ACPI\n");
  654.                         return;
  655.                 }
  656.                 status =
  657.                         acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
  658.                                                 NULL, &device_id);
  659.                 if (ACPI_SUCCESS(status)) {
  660.                         if (!device_id)
  661.                                 goto blind_set;
  662.                         iowrite32((u32)(device_id & 0x0f0f),
  663.                                   &opregion->acpi->didl[i]);
  664.                         i++;
  665.                 }
  666.         }
  667.  
  668. end:
  669.         /* If fewer than 8 outputs, the list must be null terminated */
  670.         if (i < 8)
  671.                 iowrite32(0, &opregion->acpi->didl[i]);
  672.         return;
  673.  
  674. blind_set:
  675.         i = 0;
  676.         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
  677.                 int output_type = ACPI_OTHER_OUTPUT;
  678.                 if (i >= 8) {
  679.                         dev_dbg(&dev->pdev->dev,
  680.                                 "More than 8 outputs in connector list\n");
  681.                         return;
  682.                 }
  683.                 switch (connector->connector_type) {
  684.                 case DRM_MODE_CONNECTOR_VGA:
  685.                 case DRM_MODE_CONNECTOR_DVIA:
  686.                         output_type = ACPI_VGA_OUTPUT;
  687.                         break;
  688.                 case DRM_MODE_CONNECTOR_Composite:
  689.                 case DRM_MODE_CONNECTOR_SVIDEO:
  690.                 case DRM_MODE_CONNECTOR_Component:
  691.                 case DRM_MODE_CONNECTOR_9PinDIN:
  692.                         output_type = ACPI_TV_OUTPUT;
  693.                         break;
  694.                 case DRM_MODE_CONNECTOR_DVII:
  695.                 case DRM_MODE_CONNECTOR_DVID:
  696.                 case DRM_MODE_CONNECTOR_DisplayPort:
  697.                 case DRM_MODE_CONNECTOR_HDMIA:
  698.                 case DRM_MODE_CONNECTOR_HDMIB:
  699.                         output_type = ACPI_DIGITAL_OUTPUT;
  700.                         break;
  701.                 case DRM_MODE_CONNECTOR_LVDS:
  702.                         output_type = ACPI_LVDS_OUTPUT;
  703.                         break;
  704.                 }
  705.                 temp = ioread32(&opregion->acpi->didl[i]);
  706.                 iowrite32(temp | (1<<31) | output_type | i,
  707.                           &opregion->acpi->didl[i]);
  708.                 i++;
  709.         }
  710.         goto end;
  711. }
  712.  
  713. static void intel_setup_cadls(struct drm_device *dev)
  714. {
  715.         struct drm_i915_private *dev_priv = dev->dev_private;
  716.         struct intel_opregion *opregion = &dev_priv->opregion;
  717.         int i = 0;
  718.         u32 disp_id;
  719.  
  720.         /* Initialize the CADL field by duplicating the DIDL values.
  721.          * Technically, this is not always correct as display outputs may exist,
  722.          * but not active. This initialization is necessary for some Clevo
  723.          * laptops that check this field before processing the brightness and
  724.          * display switching hotkeys. Just like DIDL, CADL is NULL-terminated if
  725.          * there are less than eight devices. */
  726.         do {
  727.                 disp_id = ioread32(&opregion->acpi->didl[i]);
  728.                 iowrite32(disp_id, &opregion->acpi->cadl[i]);
  729.         } while (++i < 8 && disp_id != 0);
  730. }
  731.  
  732. void intel_opregion_init(struct drm_device *dev)
  733. {
  734.         struct drm_i915_private *dev_priv = dev->dev_private;
  735.         struct intel_opregion *opregion = &dev_priv->opregion;
  736.  
  737.         if (!opregion->header)
  738.                 return;
  739.  
  740.         if (opregion->acpi) {
  741.                 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
  742.                         intel_didl_outputs(dev);
  743.                         intel_setup_cadls(dev);
  744.                 }
  745.  
  746.                 /* Notify BIOS we are ready to handle ACPI video ext notifs.
  747.                  * Right now, all the events are handled by the ACPI video module.
  748.                  * We don't actually need to do anything with them. */
  749.                 iowrite32(0, &opregion->acpi->csts);
  750.                 iowrite32(1, &opregion->acpi->drdy);
  751.  
  752.                 system_opregion = opregion;
  753.                 register_acpi_notifier(&intel_opregion_notifier);
  754.         }
  755.  
  756.         if (opregion->asle) {
  757.                 iowrite32(ASLE_TCHE_BLC_EN, &opregion->asle->tche);
  758.                 iowrite32(ASLE_ARDY_READY, &opregion->asle->ardy);
  759.         }
  760. }
  761.  
  762. void intel_opregion_fini(struct drm_device *dev)
  763. {
  764.         struct drm_i915_private *dev_priv = dev->dev_private;
  765.         struct intel_opregion *opregion = &dev_priv->opregion;
  766.  
  767.         if (!opregion->header)
  768.                 return;
  769.  
  770.         if (opregion->asle)
  771.                 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);
  772.  
  773.         cancel_work_sync(&dev_priv->opregion.asle_work);
  774.  
  775.         if (opregion->acpi) {
  776.                 iowrite32(0, &opregion->acpi->drdy);
  777.  
  778.                 system_opregion = NULL;
  779.                 unregister_acpi_notifier(&intel_opregion_notifier);
  780.         }
  781.  
  782.         /* just clear all opregion memory pointers now */
  783.         iounmap(opregion->header);
  784.         opregion->header = NULL;
  785.         opregion->acpi = NULL;
  786.         opregion->swsci = NULL;
  787.         opregion->asle = NULL;
  788.         opregion->vbt = NULL;
  789.         opregion->lid_state = NULL;
  790. }
  791.  
  792. static void swsci_setup(struct drm_device *dev)
  793. {
  794.         struct drm_i915_private *dev_priv = dev->dev_private;
  795.         struct intel_opregion *opregion = &dev_priv->opregion;
  796.         bool requested_callbacks = false;
  797.         u32 tmp;
  798.  
  799.         /* Sub-function code 0 is okay, let's allow them. */
  800.         opregion->swsci_gbda_sub_functions = 1;
  801.         opregion->swsci_sbcb_sub_functions = 1;
  802.  
  803.         /* We use GBDA to ask for supported GBDA calls. */
  804.         if (swsci(dev, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) {
  805.                 /* make the bits match the sub-function codes */
  806.                 tmp <<= 1;
  807.                 opregion->swsci_gbda_sub_functions |= tmp;
  808.         }
  809.  
  810.         /*
  811.          * We also use GBDA to ask for _requested_ SBCB callbacks. The driver
  812.          * must not call interfaces that are not specifically requested by the
  813.          * bios.
  814.          */
  815.         if (swsci(dev, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) {
  816.                 /* here, the bits already match sub-function codes */
  817.                 opregion->swsci_sbcb_sub_functions |= tmp;
  818.                 requested_callbacks = true;
  819.         }
  820.  
  821.         /*
  822.          * But we use SBCB to ask for _supported_ SBCB calls. This does not mean
  823.          * the callback is _requested_. But we still can't call interfaces that
  824.          * are not requested.
  825.          */
  826.         if (swsci(dev, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) {
  827.                 /* make the bits match the sub-function codes */
  828.                 u32 low = tmp & 0x7ff;
  829.                 u32 high = tmp & ~0xfff; /* bit 11 is reserved */
  830.                 tmp = (high << 4) | (low << 1) | 1;
  831.  
  832.                 /* best guess what to do with supported wrt requested */
  833.                 if (requested_callbacks) {
  834.                         u32 req = opregion->swsci_sbcb_sub_functions;
  835.                         if ((req & tmp) != req)
  836.                                 DRM_DEBUG_DRIVER("SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", req, tmp);
  837.                         /* XXX: for now, trust the requested callbacks */
  838.                         /* opregion->swsci_sbcb_sub_functions &= tmp; */
  839.                 } else {
  840.                         opregion->swsci_sbcb_sub_functions |= tmp;
  841.                 }
  842.         }
  843.  
  844.         DRM_DEBUG_DRIVER("SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",
  845.                          opregion->swsci_gbda_sub_functions,
  846.                          opregion->swsci_sbcb_sub_functions);
  847. }
  848. #else /* CONFIG_ACPI */
  849. static inline void swsci_setup(struct drm_device *dev) {}
  850. #endif  /* CONFIG_ACPI */
  851.  
  852. int intel_opregion_setup(struct drm_device *dev)
  853. {
  854.         struct drm_i915_private *dev_priv = dev->dev_private;
  855.         struct intel_opregion *opregion = &dev_priv->opregion;
  856.         void __iomem *base;
  857.         u32 asls, mboxes;
  858.         char buf[sizeof(OPREGION_SIGNATURE)];
  859.         int err = 0;
  860.  
  861.         pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
  862.         DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
  863.         if (asls == 0) {
  864.                 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
  865.                 return -ENOTSUPP;
  866.         }
  867.  
  868. #ifdef CONFIG_ACPI
  869.         INIT_WORK(&opregion->asle_work, asle_work);
  870. #endif
  871.  
  872.         base = acpi_os_ioremap(asls, OPREGION_SIZE);
  873.         if (!base)
  874.                 return -ENOMEM;
  875.  
  876.         memcpy_fromio(buf, base, sizeof(buf));
  877.  
  878.         if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
  879.                 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
  880.                 err = -EINVAL;
  881.                 goto err_out;
  882.         }
  883.         opregion->header = base;
  884.         opregion->vbt = base + OPREGION_VBT_OFFSET;
  885.  
  886.         opregion->lid_state = base + ACPI_CLID;
  887.  
  888.         mboxes = ioread32(&opregion->header->mboxes);
  889.         if (mboxes & MBOX_ACPI) {
  890.                 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
  891.                 opregion->acpi = base + OPREGION_ACPI_OFFSET;
  892.         }
  893.  
  894.         if (mboxes & MBOX_SWSCI) {
  895.                 DRM_DEBUG_DRIVER("SWSCI supported\n");
  896.                 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
  897.                 swsci_setup(dev);
  898.         }
  899.         if (mboxes & MBOX_ASLE) {
  900.                 DRM_DEBUG_DRIVER("ASLE supported\n");
  901.                 opregion->asle = base + OPREGION_ASLE_OFFSET;
  902.  
  903.                 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);
  904.         }
  905.  
  906.         return 0;
  907.  
  908. err_out:
  909.         iounmap(base);
  910.         return err;
  911. }
  912.