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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. /*
  400.  * If the vendor backlight interface is not in use and ACPI backlight interface
  401.  * is broken, do not bother processing backlight change requests from firmware.
  402.  */
  403. static bool should_ignore_backlight_request(void)
  404. {
  405.         return acpi_video_backlight_support() &&
  406.                !acpi_video_verify_backlight_support();
  407. }
  408.  
  409. static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
  410. {
  411.         struct drm_i915_private *dev_priv = dev->dev_private;
  412.         struct intel_connector *intel_connector;
  413.         struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
  414.  
  415.         DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
  416.  
  417.         if (should_ignore_backlight_request()) {
  418.                 DRM_DEBUG_KMS("opregion backlight request ignored\n");
  419.                 return 0;
  420.         }
  421.  
  422.         if (!(bclp & ASLE_BCLP_VALID))
  423.                 return ASLC_BACKLIGHT_FAILED;
  424.  
  425.         bclp &= ASLE_BCLP_MSK;
  426.         if (bclp > 255)
  427.                 return ASLC_BACKLIGHT_FAILED;
  428.  
  429.         drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
  430.  
  431.         /*
  432.          * Update backlight on all connectors that support backlight (usually
  433.          * only one).
  434.          */
  435.         DRM_DEBUG_KMS("updating opregion backlight %d/255\n", bclp);
  436.         list_for_each_entry(intel_connector, &dev->mode_config.connector_list, base.head)
  437.                 intel_panel_set_backlight_acpi(intel_connector, bclp, 255);
  438.         iowrite32(DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID, &asle->cblv);
  439.  
  440.         drm_modeset_unlock(&dev->mode_config.connection_mutex);
  441.  
  442.  
  443.         return 0;
  444. }
  445.  
  446. static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
  447. {
  448.         /* alsi is the current ALS reading in lux. 0 indicates below sensor
  449.            range, 0xffff indicates above sensor range. 1-0xfffe are valid */
  450.         DRM_DEBUG_DRIVER("Illum is not supported\n");
  451.         return ASLC_ALS_ILLUM_FAILED;
  452. }
  453.  
  454. static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
  455. {
  456.         DRM_DEBUG_DRIVER("PWM freq is not supported\n");
  457.         return ASLC_PWM_FREQ_FAILED;
  458. }
  459.  
  460. static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
  461. {
  462.         /* Panel fitting is currently controlled by the X code, so this is a
  463.            noop until modesetting support works fully */
  464.         DRM_DEBUG_DRIVER("Pfit is not supported\n");
  465.         return ASLC_PFIT_FAILED;
  466. }
  467.  
  468. static u32 asle_set_supported_rotation_angles(struct drm_device *dev, u32 srot)
  469. {
  470.         DRM_DEBUG_DRIVER("SROT is not supported\n");
  471.         return ASLC_ROTATION_ANGLES_FAILED;
  472. }
  473.  
  474. static u32 asle_set_button_array(struct drm_device *dev, u32 iuer)
  475. {
  476.         if (!iuer)
  477.                 DRM_DEBUG_DRIVER("Button array event is not supported (nothing)\n");
  478.         if (iuer & ASLE_IUER_ROTATION_LOCK_BTN)
  479.                 DRM_DEBUG_DRIVER("Button array event is not supported (rotation lock)\n");
  480.         if (iuer & ASLE_IUER_VOLUME_DOWN_BTN)
  481.                 DRM_DEBUG_DRIVER("Button array event is not supported (volume down)\n");
  482.         if (iuer & ASLE_IUER_VOLUME_UP_BTN)
  483.                 DRM_DEBUG_DRIVER("Button array event is not supported (volume up)\n");
  484.         if (iuer & ASLE_IUER_WINDOWS_BTN)
  485.                 DRM_DEBUG_DRIVER("Button array event is not supported (windows)\n");
  486.         if (iuer & ASLE_IUER_POWER_BTN)
  487.                 DRM_DEBUG_DRIVER("Button array event is not supported (power)\n");
  488.  
  489.         return ASLC_BUTTON_ARRAY_FAILED;
  490. }
  491.  
  492. static u32 asle_set_convertible(struct drm_device *dev, u32 iuer)
  493. {
  494.         if (iuer & ASLE_IUER_CONVERTIBLE)
  495.                 DRM_DEBUG_DRIVER("Convertible is not supported (clamshell)\n");
  496.         else
  497.                 DRM_DEBUG_DRIVER("Convertible is not supported (slate)\n");
  498.  
  499.         return ASLC_CONVERTIBLE_FAILED;
  500. }
  501.  
  502. static u32 asle_set_docking(struct drm_device *dev, u32 iuer)
  503. {
  504.         if (iuer & ASLE_IUER_DOCKING)
  505.                 DRM_DEBUG_DRIVER("Docking is not supported (docked)\n");
  506.         else
  507.                 DRM_DEBUG_DRIVER("Docking is not supported (undocked)\n");
  508.  
  509.         return ASLC_DOCKING_FAILED;
  510. }
  511.  
  512. static u32 asle_isct_state(struct drm_device *dev)
  513. {
  514.         DRM_DEBUG_DRIVER("ISCT is not supported\n");
  515.         return ASLC_ISCT_STATE_FAILED;
  516. }
  517.  
  518. static void asle_work(struct work_struct *work)
  519. {
  520.         struct intel_opregion *opregion =
  521.                 container_of(work, struct intel_opregion, asle_work);
  522.         struct drm_i915_private *dev_priv =
  523.                 container_of(opregion, struct drm_i915_private, opregion);
  524.         struct drm_device *dev = dev_priv->dev;
  525.         struct opregion_asle __iomem *asle = dev_priv->opregion.asle;
  526.         u32 aslc_stat = 0;
  527.         u32 aslc_req;
  528.  
  529.         if (!asle)
  530.                 return;
  531.  
  532.         aslc_req = ioread32(&asle->aslc);
  533.  
  534.         if (!(aslc_req & ASLC_REQ_MSK)) {
  535.                 DRM_DEBUG_DRIVER("No request on ASLC interrupt 0x%08x\n",
  536.                                  aslc_req);
  537.                 return;
  538.         }
  539.  
  540.         if (aslc_req & ASLC_SET_ALS_ILLUM)
  541.                 aslc_stat |= asle_set_als_illum(dev, ioread32(&asle->alsi));
  542.  
  543.         if (aslc_req & ASLC_SET_BACKLIGHT)
  544.                 aslc_stat |= asle_set_backlight(dev, ioread32(&asle->bclp));
  545.  
  546.         if (aslc_req & ASLC_SET_PFIT)
  547.                 aslc_stat |= asle_set_pfit(dev, ioread32(&asle->pfit));
  548.  
  549.         if (aslc_req & ASLC_SET_PWM_FREQ)
  550.                 aslc_stat |= asle_set_pwm_freq(dev, ioread32(&asle->pfmb));
  551.  
  552.         if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES)
  553.                 aslc_stat |= asle_set_supported_rotation_angles(dev,
  554.                                                         ioread32(&asle->srot));
  555.  
  556.         if (aslc_req & ASLC_BUTTON_ARRAY)
  557.                 aslc_stat |= asle_set_button_array(dev, ioread32(&asle->iuer));
  558.  
  559.         if (aslc_req & ASLC_CONVERTIBLE_INDICATOR)
  560.                 aslc_stat |= asle_set_convertible(dev, ioread32(&asle->iuer));
  561.  
  562.         if (aslc_req & ASLC_DOCKING_INDICATOR)
  563.                 aslc_stat |= asle_set_docking(dev, ioread32(&asle->iuer));
  564.  
  565.         if (aslc_req & ASLC_ISCT_STATE_CHANGE)
  566.                 aslc_stat |= asle_isct_state(dev);
  567.  
  568.         iowrite32(aslc_stat, &asle->aslc);
  569. }
  570.  
  571. void intel_opregion_asle_intr(struct drm_device *dev)
  572. {
  573.         struct drm_i915_private *dev_priv = dev->dev_private;
  574.  
  575.         if (dev_priv->opregion.asle)
  576.                 schedule_work(&dev_priv->opregion.asle_work);
  577. }
  578.  
  579. #define ACPI_EV_DISPLAY_SWITCH (1<<0)
  580. #define ACPI_EV_LID            (1<<1)
  581. #define ACPI_EV_DOCK           (1<<2)
  582.  
  583. static struct intel_opregion *system_opregion;
  584.  
  585. static int intel_opregion_video_event(struct notifier_block *nb,
  586.                                       unsigned long val, void *data)
  587. {
  588.         /* The only video events relevant to opregion are 0x80. These indicate
  589.            either a docking event, lid switch or display switch request. In
  590.            Linux, these are handled by the dock, button and video drivers.
  591.         */
  592.  
  593.         struct opregion_acpi __iomem *acpi;
  594.         struct acpi_bus_event *event = data;
  595.         int ret = NOTIFY_OK;
  596.  
  597.         if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
  598.                 return NOTIFY_DONE;
  599.  
  600.         if (!system_opregion)
  601.                 return NOTIFY_DONE;
  602.  
  603.         acpi = system_opregion->acpi;
  604.  
  605.         if (event->type == 0x80 &&
  606.             (ioread32(&acpi->cevt) & 1) == 0)
  607.                 ret = NOTIFY_BAD;
  608.  
  609.         iowrite32(0, &acpi->csts);
  610.  
  611.         return ret;
  612. }
  613.  
  614. static struct notifier_block intel_opregion_notifier = {
  615.         .notifier_call = intel_opregion_video_event,
  616. };
  617.  
  618. /*
  619.  * Initialise the DIDL field in opregion. This passes a list of devices to
  620.  * the firmware. Values are defined by section B.4.2 of the ACPI specification
  621.  * (version 3)
  622.  */
  623.  
  624. static void intel_didl_outputs(struct drm_device *dev)
  625. {
  626.         struct drm_i915_private *dev_priv = dev->dev_private;
  627.         struct intel_opregion *opregion = &dev_priv->opregion;
  628.         struct drm_connector *connector;
  629.         acpi_handle handle;
  630.         struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL;
  631.         unsigned long long device_id;
  632.         acpi_status status;
  633.         u32 temp;
  634.         int i = 0;
  635.  
  636.         handle = ACPI_HANDLE(&dev->pdev->dev);
  637.         if (!handle || acpi_bus_get_device(handle, &acpi_dev))
  638.                 return;
  639.  
  640.         if (acpi_is_video_device(handle))
  641.                 acpi_video_bus = acpi_dev;
  642.         else {
  643.                 list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
  644.                         if (acpi_is_video_device(acpi_cdev->handle)) {
  645.                                 acpi_video_bus = acpi_cdev;
  646.                                 break;
  647.                         }
  648.                 }
  649.         }
  650.  
  651.         if (!acpi_video_bus) {
  652.                 pr_warn("No ACPI video bus found\n");
  653.                 return;
  654.         }
  655.  
  656.         list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
  657.                 if (i >= 8) {
  658.                         dev_dbg(&dev->pdev->dev,
  659.                                 "More than 8 outputs detected via ACPI\n");
  660.                         return;
  661.                 }
  662.                 status =
  663.                         acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
  664.                                                 NULL, &device_id);
  665.                 if (ACPI_SUCCESS(status)) {
  666.                         if (!device_id)
  667.                                 goto blind_set;
  668.                         iowrite32((u32)(device_id & 0x0f0f),
  669.                                   &opregion->acpi->didl[i]);
  670.                         i++;
  671.                 }
  672.         }
  673.  
  674. end:
  675.         /* If fewer than 8 outputs, the list must be null terminated */
  676.         if (i < 8)
  677.                 iowrite32(0, &opregion->acpi->didl[i]);
  678.         return;
  679.  
  680. blind_set:
  681.         i = 0;
  682.         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
  683.                 int output_type = ACPI_OTHER_OUTPUT;
  684.                 if (i >= 8) {
  685.                         dev_dbg(&dev->pdev->dev,
  686.                                 "More than 8 outputs in connector list\n");
  687.                         return;
  688.                 }
  689.                 switch (connector->connector_type) {
  690.                 case DRM_MODE_CONNECTOR_VGA:
  691.                 case DRM_MODE_CONNECTOR_DVIA:
  692.                         output_type = ACPI_VGA_OUTPUT;
  693.                         break;
  694.                 case DRM_MODE_CONNECTOR_Composite:
  695.                 case DRM_MODE_CONNECTOR_SVIDEO:
  696.                 case DRM_MODE_CONNECTOR_Component:
  697.                 case DRM_MODE_CONNECTOR_9PinDIN:
  698.                         output_type = ACPI_TV_OUTPUT;
  699.                         break;
  700.                 case DRM_MODE_CONNECTOR_DVII:
  701.                 case DRM_MODE_CONNECTOR_DVID:
  702.                 case DRM_MODE_CONNECTOR_DisplayPort:
  703.                 case DRM_MODE_CONNECTOR_HDMIA:
  704.                 case DRM_MODE_CONNECTOR_HDMIB:
  705.                         output_type = ACPI_DIGITAL_OUTPUT;
  706.                         break;
  707.                 case DRM_MODE_CONNECTOR_LVDS:
  708.                         output_type = ACPI_LVDS_OUTPUT;
  709.                         break;
  710.                 }
  711.                 temp = ioread32(&opregion->acpi->didl[i]);
  712.                 iowrite32(temp | (1<<31) | output_type | i,
  713.                           &opregion->acpi->didl[i]);
  714.                 i++;
  715.         }
  716.         goto end;
  717. }
  718.  
  719. static void intel_setup_cadls(struct drm_device *dev)
  720. {
  721.         struct drm_i915_private *dev_priv = dev->dev_private;
  722.         struct intel_opregion *opregion = &dev_priv->opregion;
  723.         int i = 0;
  724.         u32 disp_id;
  725.  
  726.         /* Initialize the CADL field by duplicating the DIDL values.
  727.          * Technically, this is not always correct as display outputs may exist,
  728.          * but not active. This initialization is necessary for some Clevo
  729.          * laptops that check this field before processing the brightness and
  730.          * display switching hotkeys. Just like DIDL, CADL is NULL-terminated if
  731.          * there are less than eight devices. */
  732.         do {
  733.                 disp_id = ioread32(&opregion->acpi->didl[i]);
  734.                 iowrite32(disp_id, &opregion->acpi->cadl[i]);
  735.         } while (++i < 8 && disp_id != 0);
  736. }
  737.  
  738. void intel_opregion_init(struct drm_device *dev)
  739. {
  740.         struct drm_i915_private *dev_priv = dev->dev_private;
  741.         struct intel_opregion *opregion = &dev_priv->opregion;
  742.  
  743.         if (!opregion->header)
  744.                 return;
  745.  
  746.         if (opregion->acpi) {
  747.                 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
  748.                         intel_didl_outputs(dev);
  749.                         intel_setup_cadls(dev);
  750.                 }
  751.  
  752.                 /* Notify BIOS we are ready to handle ACPI video ext notifs.
  753.                  * Right now, all the events are handled by the ACPI video module.
  754.                  * We don't actually need to do anything with them. */
  755.                 iowrite32(0, &opregion->acpi->csts);
  756.                 iowrite32(1, &opregion->acpi->drdy);
  757.  
  758.                 system_opregion = opregion;
  759.                 register_acpi_notifier(&intel_opregion_notifier);
  760.         }
  761.  
  762.         if (opregion->asle) {
  763.                 iowrite32(ASLE_TCHE_BLC_EN, &opregion->asle->tche);
  764.                 iowrite32(ASLE_ARDY_READY, &opregion->asle->ardy);
  765.         }
  766. }
  767.  
  768. void intel_opregion_fini(struct drm_device *dev)
  769. {
  770.         struct drm_i915_private *dev_priv = dev->dev_private;
  771.         struct intel_opregion *opregion = &dev_priv->opregion;
  772.  
  773.         if (!opregion->header)
  774.                 return;
  775.  
  776.         if (opregion->asle)
  777.                 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);
  778.  
  779.         cancel_work_sync(&dev_priv->opregion.asle_work);
  780.  
  781.         if (opregion->acpi) {
  782.                 iowrite32(0, &opregion->acpi->drdy);
  783.  
  784.                 system_opregion = NULL;
  785.                 unregister_acpi_notifier(&intel_opregion_notifier);
  786.         }
  787.  
  788.         /* just clear all opregion memory pointers now */
  789.         iounmap(opregion->header);
  790.         opregion->header = NULL;
  791.         opregion->acpi = NULL;
  792.         opregion->swsci = NULL;
  793.         opregion->asle = NULL;
  794.         opregion->vbt = NULL;
  795.         opregion->lid_state = NULL;
  796. }
  797.  
  798. static void swsci_setup(struct drm_device *dev)
  799. {
  800.         struct drm_i915_private *dev_priv = dev->dev_private;
  801.         struct intel_opregion *opregion = &dev_priv->opregion;
  802.         bool requested_callbacks = false;
  803.         u32 tmp;
  804.  
  805.         /* Sub-function code 0 is okay, let's allow them. */
  806.         opregion->swsci_gbda_sub_functions = 1;
  807.         opregion->swsci_sbcb_sub_functions = 1;
  808.  
  809.         /* We use GBDA to ask for supported GBDA calls. */
  810.         if (swsci(dev, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) {
  811.                 /* make the bits match the sub-function codes */
  812.                 tmp <<= 1;
  813.                 opregion->swsci_gbda_sub_functions |= tmp;
  814.         }
  815.  
  816.         /*
  817.          * We also use GBDA to ask for _requested_ SBCB callbacks. The driver
  818.          * must not call interfaces that are not specifically requested by the
  819.          * bios.
  820.          */
  821.         if (swsci(dev, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) {
  822.                 /* here, the bits already match sub-function codes */
  823.                 opregion->swsci_sbcb_sub_functions |= tmp;
  824.                 requested_callbacks = true;
  825.         }
  826.  
  827.         /*
  828.          * But we use SBCB to ask for _supported_ SBCB calls. This does not mean
  829.          * the callback is _requested_. But we still can't call interfaces that
  830.          * are not requested.
  831.          */
  832.         if (swsci(dev, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) {
  833.                 /* make the bits match the sub-function codes */
  834.                 u32 low = tmp & 0x7ff;
  835.                 u32 high = tmp & ~0xfff; /* bit 11 is reserved */
  836.                 tmp = (high << 4) | (low << 1) | 1;
  837.  
  838.                 /* best guess what to do with supported wrt requested */
  839.                 if (requested_callbacks) {
  840.                         u32 req = opregion->swsci_sbcb_sub_functions;
  841.                         if ((req & tmp) != req)
  842.                                 DRM_DEBUG_DRIVER("SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", req, tmp);
  843.                         /* XXX: for now, trust the requested callbacks */
  844.                         /* opregion->swsci_sbcb_sub_functions &= tmp; */
  845.                 } else {
  846.                         opregion->swsci_sbcb_sub_functions |= tmp;
  847.                 }
  848.         }
  849.  
  850.         DRM_DEBUG_DRIVER("SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",
  851.                          opregion->swsci_gbda_sub_functions,
  852.                          opregion->swsci_sbcb_sub_functions);
  853. }
  854. #else /* CONFIG_ACPI */
  855. static inline void swsci_setup(struct drm_device *dev) {}
  856. #endif  /* CONFIG_ACPI */
  857.  
  858. int intel_opregion_setup(struct drm_device *dev)
  859. {
  860.         struct drm_i915_private *dev_priv = dev->dev_private;
  861.         struct intel_opregion *opregion = &dev_priv->opregion;
  862.         void __iomem *base;
  863.         u32 asls, mboxes;
  864.         char buf[sizeof(OPREGION_SIGNATURE)];
  865.         int err = 0;
  866.  
  867.         pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
  868.         DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
  869.         if (asls == 0) {
  870.                 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
  871.                 return -ENOTSUPP;
  872.         }
  873.  
  874. #ifdef CONFIG_ACPI
  875.         INIT_WORK(&opregion->asle_work, asle_work);
  876. #endif
  877.  
  878.         base = acpi_os_ioremap(asls, OPREGION_SIZE);
  879.         if (!base)
  880.                 return -ENOMEM;
  881.  
  882.         memcpy_fromio(buf, base, sizeof(buf));
  883.  
  884.         if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
  885.                 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
  886.                 err = -EINVAL;
  887.                 goto err_out;
  888.         }
  889.         opregion->header = base;
  890.         opregion->vbt = base + OPREGION_VBT_OFFSET;
  891.  
  892.         opregion->lid_state = base + ACPI_CLID;
  893.  
  894.         mboxes = ioread32(&opregion->header->mboxes);
  895.         if (mboxes & MBOX_ACPI) {
  896.                 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
  897.                 opregion->acpi = base + OPREGION_ACPI_OFFSET;
  898.         }
  899.  
  900.         if (mboxes & MBOX_SWSCI) {
  901.                 DRM_DEBUG_DRIVER("SWSCI supported\n");
  902.                 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
  903.                 swsci_setup(dev);
  904.         }
  905.         if (mboxes & MBOX_ASLE) {
  906.                 DRM_DEBUG_DRIVER("ASLE supported\n");
  907.                 opregion->asle = base + OPREGION_ASLE_OFFSET;
  908.  
  909.                 iowrite32(ASLE_ARDY_NOT_READY, &opregion->asle->ardy);
  910.         }
  911.  
  912.         return 0;
  913.  
  914. err_out:
  915.         iounmap(base);
  916.         return err;
  917. }
  918.