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