| 1 | /* $NetBSD: acpi_display.c,v 1.15 2016/04/03 10:32:47 mlelstv Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 2010 The NetBSD Foundation, Inc. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software contributed to The NetBSD Foundation |
| 8 | * by Gregoire Sutre. |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: |
| 13 | * 1. Redistributions of source code must retain the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer. |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in the |
| 17 | * documentation and/or other materials provided with the distribution. |
| 18 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 29 | * POSSIBILITY OF SUCH DAMAGE. |
| 30 | */ |
| 31 | |
| 32 | /* |
| 33 | * ACPI Display Adapter Driver. |
| 34 | * |
| 35 | * Appendix B of the ACPI specification presents ACPI extensions for display |
| 36 | * adapters. Systems containing a built-in display adapter are required to |
| 37 | * implement these extensions (in their ACPI BIOS). This driver uses these |
| 38 | * extensions to provide generic support for brightness control and display |
| 39 | * switching. |
| 40 | * |
| 41 | * If brightness control methods are absent or non-functional, ACPI brightness |
| 42 | * notifications are relayed to the PMF framework. |
| 43 | * |
| 44 | * This driver sets the BIOS switch policy (_DOS method) as follows: |
| 45 | * - The BIOS should automatically switch the active display output, with no |
| 46 | * interaction required on the OS part. |
| 47 | * - The BIOS should not automatically control the brightness levels. |
| 48 | * |
| 49 | * Brightness and BIOS switch policy can be adjusted from userland, via the |
| 50 | * sysctl variables acpivga<n>.policy and acpiout<n>.brightness under hw.acpi. |
| 51 | */ |
| 52 | |
| 53 | /* |
| 54 | * The driver uses mutex(9) protection since changes to the hardware/software |
| 55 | * state may be initiated both by the BIOS (ACPI notifications) and by the user |
| 56 | * (sysctl). The ACPI display adapter's mutex is shared with all ACPI display |
| 57 | * output devices attached to it. |
| 58 | * |
| 59 | * The mutex only prevents undesired interleavings of ACPI notify handlers, |
| 60 | * sysctl callbacks, and pmf(9) suspend/resume routines. Race conditions with |
| 61 | * autoconf(9) detachment routines could, in theory, still occur. |
| 62 | * |
| 63 | * The array of connected output devices (sc_odinfo) is, after attachment, only |
| 64 | * used in ACPI notify handler callbacks. Since two such callbacks cannot be |
| 65 | * running simultaneously, this information does not need protection. |
| 66 | */ |
| 67 | |
| 68 | #include <sys/cdefs.h> |
| 69 | __KERNEL_RCSID(0, "$NetBSD: acpi_display.c,v 1.15 2016/04/03 10:32:47 mlelstv Exp $" ); |
| 70 | |
| 71 | #include <sys/param.h> |
| 72 | #include <sys/device.h> |
| 73 | #include <sys/kmem.h> |
| 74 | #include <sys/module.h> |
| 75 | #include <sys/mutex.h> |
| 76 | #include <sys/sysctl.h> |
| 77 | #include <sys/systm.h> |
| 78 | |
| 79 | #include <dev/pci/pcireg.h> |
| 80 | #include <dev/pci/pcidevs.h> |
| 81 | |
| 82 | #include <dev/acpi/acpireg.h> |
| 83 | #include <dev/acpi/acpivar.h> |
| 84 | |
| 85 | #define _COMPONENT ACPI_DISPLAY_COMPONENT |
| 86 | ACPI_MODULE_NAME ("acpi_display" ) |
| 87 | |
| 88 | /* Notifications specific to display adapter devices (ACPI 4.0a, Sec. B.5). */ |
| 89 | #define ACPI_NOTIFY_CycleOutputDevice 0x80 |
| 90 | #define ACPI_NOTIFY_OutputDeviceStatusChange 0x81 |
| 91 | #define ACPI_NOTIFY_CycleDisplayOutputHotkeyPressed 0x82 |
| 92 | #define ACPI_NOTIFY_NextDisplayOutputHotkeyPressed 0x83 |
| 93 | #define ACPI_NOTIFY_PreviousDisplayOutputHotkeyPressed 0x84 |
| 94 | |
| 95 | /* Notifications specific to display output devices (ACPI 4.0a, Sec. B.7). */ |
| 96 | #define ACPI_NOTIFY_CycleBrightness 0x85 |
| 97 | #define ACPI_NOTIFY_IncreaseBrightness 0x86 |
| 98 | #define ACPI_NOTIFY_DecreaseBrightness 0x87 |
| 99 | #define ACPI_NOTIFY_ZeroBrightness 0x88 |
| 100 | #define ACPI_NOTIFY_DisplayDeviceOff 0x89 |
| 101 | |
| 102 | /* Format of the BIOS switch policy set by _DOS (ACPI 4.0a, Sec. B.4.1). */ |
| 103 | typedef union acpidisp_bios_policy_t { |
| 104 | uint8_t raw; |
| 105 | struct { |
| 106 | uint8_t output:2; |
| 107 | uint8_t brightness:1; |
| 108 | uint8_t reserved:5; |
| 109 | } __packed fmt; |
| 110 | } acpidisp_bios_policy_t; |
| 111 | |
| 112 | /* Default BIOS switch policy (ACPI 4.0a, Sec. B.4.1). */ |
| 113 | static const acpidisp_bios_policy_t acpidisp_default_bios_policy = { |
| 114 | .raw = 0x1 |
| 115 | }; |
| 116 | |
| 117 | /* BIOS output switch policies (ACPI 4.0a, Sec. B.4.1). */ |
| 118 | #define ACPI_DISP_POLICY_OUTPUT_NORMAL 0x0 |
| 119 | #define ACPI_DISP_POLICY_OUTPUT_AUTO 0x1 |
| 120 | #define ACPI_DISP_POLICY_OUTPUT_LOCKED 0x2 |
| 121 | #define ACPI_DISP_POLICY_OUTPUT_HOTKEY 0x3 |
| 122 | |
| 123 | /* BIOS brightness switch policies (ACPI 4.0a, Sec. B.4.1). */ |
| 124 | #define ACPI_DISP_POLICY_BRIGHTNESS_AUTO 0x0 |
| 125 | #define ACPI_DISP_POLICY_BRIGHTNESS_NORMAL 0x1 |
| 126 | |
| 127 | /* Format of output device attributes (ACPI 4.0a, Table B-2). */ |
| 128 | typedef union acpidisp_od_attrs_t { |
| 129 | uint16_t device_id; |
| 130 | uint32_t raw; |
| 131 | struct { |
| 132 | uint8_t index:4; |
| 133 | uint8_t port:4; |
| 134 | uint8_t type:4; |
| 135 | uint8_t vendor_specific:4; |
| 136 | uint8_t bios_detect:1; |
| 137 | uint8_t non_vga:1; |
| 138 | uint8_t head_id:3; |
| 139 | uint16_t reserved:10; |
| 140 | uint8_t device_id_scheme:1; |
| 141 | } __packed fmt; |
| 142 | } acpidisp_od_attrs_t; |
| 143 | |
| 144 | /* Common legacy output device IDs (ACPI 2.0c, Table B-3). */ |
| 145 | #define ACPI_DISP_OUT_LEGACY_DEVID_MONITOR 0x0100 |
| 146 | #define ACPI_DISP_OUT_LEGACY_DEVID_PANEL 0x0110 |
| 147 | #define ACPI_DISP_OUT_LEGACY_DEVID_TV 0x0200 |
| 148 | |
| 149 | /* Output device display types (ACPI 4.0a, Table B-2). */ |
| 150 | #define ACPI_DISP_OUT_ATTR_TYPE_OTHER 0x0 |
| 151 | #define ACPI_DISP_OUT_ATTR_TYPE_VGA 0x1 |
| 152 | #define ACPI_DISP_OUT_ATTR_TYPE_TV 0x2 |
| 153 | #define ACPI_DISP_OUT_ATTR_TYPE_EXTDIG 0x3 |
| 154 | #define ACPI_DISP_OUT_ATTR_TYPE_INTDFP 0x4 |
| 155 | |
| 156 | /* Format of output device status (ACPI 4.0a, Table B-4). */ |
| 157 | typedef union acpidisp_od_status_t { |
| 158 | uint32_t raw; |
| 159 | struct { |
| 160 | uint8_t exists:1; |
| 161 | uint8_t activated:1; |
| 162 | uint8_t ready:1; |
| 163 | uint8_t not_defective:1; |
| 164 | uint8_t attached:1; |
| 165 | uint32_t reserved:27; |
| 166 | } __packed fmt; |
| 167 | } acpidisp_od_status_t; |
| 168 | |
| 169 | /* Format of output device state (ACPI 4.0a, Table B-6). */ |
| 170 | typedef union acpidisp_od_state_t { |
| 171 | uint32_t raw; |
| 172 | struct { |
| 173 | uint8_t active:1; |
| 174 | uint32_t reserved:29; |
| 175 | uint8_t no_switch:1; |
| 176 | uint8_t commit:1; |
| 177 | } __packed fmt; |
| 178 | } acpidisp_od_state_t; |
| 179 | |
| 180 | /* |
| 181 | * acpidisp_outdev: |
| 182 | * |
| 183 | * Description of an ACPI display output device. This structure groups |
| 184 | * together: |
| 185 | * - the output device attributes, given in the display adapter's _DOD |
| 186 | * method (ACPI 4.0a, Sec. B.4.2). |
| 187 | * - the corresponding instance of the acpiout driver (if any). |
| 188 | */ |
| 189 | struct acpidisp_outdev { |
| 190 | acpidisp_od_attrs_t od_attrs; /* Attributes */ |
| 191 | device_t od_device; /* Matching base device */ |
| 192 | }; |
| 193 | |
| 194 | /* |
| 195 | * acpidisp_odinfo: |
| 196 | * |
| 197 | * Information on connected output devices (ACPI 4.0a, Sec. B.4.2). This |
| 198 | * structure enumerates all devices (_DOD package) connected to a display |
| 199 | * adapter. Currently, this information is only used for display output |
| 200 | * switching via hotkey. |
| 201 | * |
| 202 | * Invariants (after initialization): |
| 203 | * |
| 204 | * (oi_dev != NULL) && (oi_dev_count > 0) |
| 205 | */ |
| 206 | struct acpidisp_odinfo { |
| 207 | struct acpidisp_outdev *oi_dev; /* Array of output devices */ |
| 208 | uint32_t oi_dev_count; /* Number of output devices */ |
| 209 | }; |
| 210 | |
| 211 | /* |
| 212 | * acpidisp_vga_softc: |
| 213 | * |
| 214 | * Software state of an ACPI display adapter. |
| 215 | * |
| 216 | * Invariants (after attachment): |
| 217 | * |
| 218 | * ((sc_caps & ACPI_DISP_VGA_CAP__DOD) == 0) => (sc_odinfo == NULL) |
| 219 | */ |
| 220 | struct acpidisp_vga_softc { |
| 221 | device_t sc_dev; /* Base device info */ |
| 222 | struct acpi_devnode *sc_node; /* ACPI device node */ |
| 223 | struct sysctllog *sc_log; /* Sysctl log */ |
| 224 | kmutex_t sc_mtx; /* Mutex (shared w/ outputs) */ |
| 225 | uint16_t sc_caps; /* Capabilities (methods) */ |
| 226 | acpidisp_bios_policy_t sc_policy; /* BIOS switch policy (_DOS) */ |
| 227 | struct acpidisp_odinfo *sc_odinfo; /* Connected output devices */ |
| 228 | }; |
| 229 | |
| 230 | /* |
| 231 | * ACPI display adapter capabilities (methods). |
| 232 | */ |
| 233 | #define ACPI_DISP_VGA_CAP__DOS __BIT(0) |
| 234 | #define ACPI_DISP_VGA_CAP__DOD __BIT(1) |
| 235 | #define ACPI_DISP_VGA_CAP__ROM __BIT(2) |
| 236 | #define ACPI_DISP_VGA_CAP__GPD __BIT(3) |
| 237 | #define ACPI_DISP_VGA_CAP__SPD __BIT(4) |
| 238 | #define ACPI_DISP_VGA_CAP__VPO __BIT(5) |
| 239 | |
| 240 | /* |
| 241 | * acpidisp_acpivga_attach_args: |
| 242 | * |
| 243 | * Attachment structure for the acpivga interface. Used to attach display |
| 244 | * output devices under a display adapter. |
| 245 | */ |
| 246 | struct acpidisp_acpivga_attach_args { |
| 247 | struct acpi_devnode *aa_node; /* ACPI device node */ |
| 248 | kmutex_t *aa_mtx; /* Shared mutex */ |
| 249 | }; |
| 250 | |
| 251 | /* |
| 252 | * acpidisp_brctl: |
| 253 | * |
| 254 | * Brightness control (ACPI 4.0a, Sec. B.6.2 to B.6.4). This structure |
| 255 | * contains the supported brightness levels (_BCL package) and the current |
| 256 | * level. Following Windows 7 brightness control, we ignore the fullpower |
| 257 | * and battery levels (as it simplifies the code). |
| 258 | * |
| 259 | * The array bc_level is sorted in strictly ascending order. |
| 260 | * |
| 261 | * Invariants (after initialization): |
| 262 | * |
| 263 | * (bc_level != NULL) && (bc_level_count > 0) |
| 264 | */ |
| 265 | struct acpidisp_brctl { |
| 266 | uint8_t *bc_level; /* Array of levels */ |
| 267 | uint16_t bc_level_count; /* Number of levels */ |
| 268 | uint8_t bc_current; /* Current level */ |
| 269 | }; |
| 270 | |
| 271 | /* |
| 272 | * Minimum brightness increment/decrement in response to increase/decrease |
| 273 | * brightness hotkey notifications. Must be strictly positive. |
| 274 | */ |
| 275 | #define ACPI_DISP_BRCTL_STEP 5 |
| 276 | |
| 277 | /* |
| 278 | * acpidisp_out_softc: |
| 279 | * |
| 280 | * Software state of an ACPI display output device. |
| 281 | * |
| 282 | * Invariants (after attachment): |
| 283 | * |
| 284 | * ((sc_caps & ACPI_DISP_OUT_CAP__BCL) == 0) => (sc_brctl == NULL) |
| 285 | * ((sc_caps & ACPI_DISP_OUT_CAP__BCM) == 0) => (sc_brctl == NULL) |
| 286 | */ |
| 287 | struct acpidisp_out_softc { |
| 288 | device_t sc_dev; /* Base device info */ |
| 289 | struct acpi_devnode *sc_node; /* ACPI device node */ |
| 290 | struct sysctllog *sc_log; /* Sysctl log */ |
| 291 | kmutex_t *sc_mtx; /* Mutex (shared w/ adapter) */ |
| 292 | uint16_t sc_caps; /* Capabilities (methods) */ |
| 293 | struct acpidisp_brctl *sc_brctl; /* Brightness control */ |
| 294 | }; |
| 295 | |
| 296 | /* |
| 297 | * ACPI display output device capabilities (methods). |
| 298 | */ |
| 299 | #define ACPI_DISP_OUT_CAP__BCL __BIT(0) |
| 300 | #define ACPI_DISP_OUT_CAP__BCM __BIT(1) |
| 301 | #define ACPI_DISP_OUT_CAP__BQC __BIT(2) |
| 302 | #define ACPI_DISP_OUT_CAP__DDC __BIT(3) |
| 303 | #define ACPI_DISP_OUT_CAP__DCS __BIT(4) |
| 304 | #define ACPI_DISP_OUT_CAP__DGS __BIT(5) |
| 305 | #define ACPI_DISP_OUT_CAP__DSS __BIT(6) |
| 306 | |
| 307 | static int acpidisp_vga_match(device_t, cfdata_t, void *); |
| 308 | static void acpidisp_vga_attach(device_t, device_t, void *); |
| 309 | static int acpidisp_vga_detach(device_t, int); |
| 310 | static void acpidisp_vga_childdetached(device_t, device_t); |
| 311 | |
| 312 | static void acpidisp_vga_scan_outdevs(struct acpidisp_vga_softc *); |
| 313 | static int acpidisp_acpivga_print(void *, const char *); |
| 314 | |
| 315 | static int acpidisp_out_match(device_t, cfdata_t, void *); |
| 316 | static void acpidisp_out_attach(device_t, device_t, void *); |
| 317 | static int acpidisp_out_detach(device_t, int); |
| 318 | |
| 319 | CFATTACH_DECL2_NEW(acpivga, sizeof(struct acpidisp_vga_softc), |
| 320 | acpidisp_vga_match, acpidisp_vga_attach, acpidisp_vga_detach, NULL, |
| 321 | NULL, acpidisp_vga_childdetached); |
| 322 | |
| 323 | CFATTACH_DECL_NEW(acpiout, sizeof(struct acpidisp_out_softc), |
| 324 | acpidisp_out_match, acpidisp_out_attach, acpidisp_out_detach, NULL); |
| 325 | |
| 326 | static bool acpidisp_vga_resume(device_t, const pmf_qual_t *); |
| 327 | static bool acpidisp_out_suspend(device_t, const pmf_qual_t *); |
| 328 | static bool acpidisp_out_resume(device_t, const pmf_qual_t *); |
| 329 | |
| 330 | static uint16_t acpidisp_vga_capabilities(const struct acpi_devnode *); |
| 331 | static uint16_t acpidisp_out_capabilities(const struct acpi_devnode *); |
| 332 | static void acpidisp_vga_print_capabilities(device_t, uint16_t); |
| 333 | static void acpidisp_out_print_capabilities(device_t, uint16_t); |
| 334 | |
| 335 | static void acpidisp_vga_notify_handler(ACPI_HANDLE, uint32_t, void *); |
| 336 | static void acpidisp_out_notify_handler(ACPI_HANDLE, uint32_t, void *); |
| 337 | |
| 338 | static void acpidisp_vga_cycle_output_device_callback(void *); |
| 339 | static void acpidisp_vga_output_device_change_callback(void *); |
| 340 | static void acpidisp_out_increase_brightness_callback(void *); |
| 341 | static void acpidisp_out_decrease_brightness_callback(void *); |
| 342 | static void acpidisp_out_cycle_brightness_callback(void *); |
| 343 | static void acpidisp_out_zero_brightness_callback(void *); |
| 344 | |
| 345 | static void acpidisp_vga_sysctl_setup(struct acpidisp_vga_softc *); |
| 346 | static void acpidisp_out_sysctl_setup(struct acpidisp_out_softc *); |
| 347 | #ifdef ACPI_DEBUG |
| 348 | static int acpidisp_vga_sysctl_policy(SYSCTLFN_PROTO); |
| 349 | #endif |
| 350 | static int acpidisp_vga_sysctl_policy_output(SYSCTLFN_PROTO); |
| 351 | #ifdef ACPI_DISP_SWITCH_SYSCTLS |
| 352 | static int acpidisp_out_sysctl_status(SYSCTLFN_PROTO); |
| 353 | static int acpidisp_out_sysctl_state(SYSCTLFN_PROTO); |
| 354 | #endif |
| 355 | static int acpidisp_out_sysctl_brightness(SYSCTLFN_PROTO); |
| 356 | |
| 357 | static struct acpidisp_odinfo * |
| 358 | acpidisp_init_odinfo(const struct acpidisp_vga_softc *); |
| 359 | static void acpidisp_vga_bind_outdevs(struct acpidisp_vga_softc *); |
| 360 | static struct acpidisp_brctl * |
| 361 | acpidisp_init_brctl(const struct acpidisp_out_softc *); |
| 362 | |
| 363 | static int acpidisp_set_policy(const struct acpidisp_vga_softc *, |
| 364 | uint8_t); |
| 365 | static int acpidisp_get_status(const struct acpidisp_out_softc *, |
| 366 | uint32_t *); |
| 367 | static int acpidisp_get_state(const struct acpidisp_out_softc *, |
| 368 | uint32_t *); |
| 369 | static int acpidisp_set_state(const struct acpidisp_out_softc *, |
| 370 | uint32_t); |
| 371 | static int acpidisp_get_brightness(const struct acpidisp_out_softc *, |
| 372 | uint8_t *); |
| 373 | static int acpidisp_set_brightness(const struct acpidisp_out_softc *, |
| 374 | uint8_t); |
| 375 | |
| 376 | static void acpidisp_print_odinfo(device_t, const struct acpidisp_odinfo *); |
| 377 | static void acpidisp_print_brctl(device_t, const struct acpidisp_brctl *); |
| 378 | static void acpidisp_print_od_attrs(acpidisp_od_attrs_t); |
| 379 | |
| 380 | static bool acpidisp_has_method(ACPI_HANDLE, const char *, |
| 381 | ACPI_OBJECT_TYPE); |
| 382 | static ACPI_STATUS |
| 383 | acpidisp_eval_package(ACPI_HANDLE, const char *, ACPI_OBJECT **, |
| 384 | unsigned int); |
| 385 | static void acpidisp_array_search(const uint8_t *, uint16_t, int, uint8_t *, |
| 386 | uint8_t *); |
| 387 | |
| 388 | /* |
| 389 | * Autoconfiguration for the acpivga driver. |
| 390 | */ |
| 391 | |
| 392 | static int |
| 393 | acpidisp_vga_match(device_t parent, cfdata_t match, void *aux) |
| 394 | { |
| 395 | struct acpi_attach_args *aa = aux; |
| 396 | struct acpi_devnode *ad = aa->aa_node; |
| 397 | struct acpi_pci_info *ap; |
| 398 | pcireg_t id, class; |
| 399 | pcitag_t tag; |
| 400 | |
| 401 | if (ad->ad_type != ACPI_TYPE_DEVICE) |
| 402 | return 0; |
| 403 | |
| 404 | ap = ad->ad_pciinfo; |
| 405 | |
| 406 | if (ap == NULL) |
| 407 | return 0; |
| 408 | |
| 409 | if ((ap->ap_flags & ACPI_PCI_INFO_DEVICE) == 0) |
| 410 | return 0; |
| 411 | |
| 412 | if (ap->ap_function == 0xffff) |
| 413 | return 0; |
| 414 | |
| 415 | KASSERT(ap->ap_bus < 256); |
| 416 | KASSERT(ap->ap_device < 32); |
| 417 | KASSERT(ap->ap_function < 8); |
| 418 | |
| 419 | /* |
| 420 | * Check that the PCI device is present, verify |
| 421 | * the class of the PCI device, and finally see |
| 422 | * if the ACPI device is capable of something. |
| 423 | */ |
| 424 | tag = pci_make_tag(aa->aa_pc, ap->ap_bus, |
| 425 | ap->ap_device, ap->ap_function); |
| 426 | |
| 427 | id = pci_conf_read(aa->aa_pc, tag, PCI_ID_REG); |
| 428 | |
| 429 | if (PCI_VENDOR(id) == PCI_VENDOR_INVALID || PCI_VENDOR(id) == 0) |
| 430 | return 0; |
| 431 | |
| 432 | class = pci_conf_read(aa->aa_pc, tag, PCI_CLASS_REG); |
| 433 | |
| 434 | if (PCI_CLASS(class) != PCI_CLASS_DISPLAY) |
| 435 | return 0; |
| 436 | |
| 437 | if (acpidisp_vga_capabilities(ad) == 0) |
| 438 | return 0; |
| 439 | |
| 440 | return 1; |
| 441 | } |
| 442 | |
| 443 | static void |
| 444 | acpidisp_vga_attach(device_t parent, device_t self, void *aux) |
| 445 | { |
| 446 | struct acpidisp_vga_softc *asc = device_private(self); |
| 447 | struct acpi_attach_args *aa = aux; |
| 448 | struct acpi_devnode *ad = aa->aa_node; |
| 449 | |
| 450 | aprint_naive(": ACPI Display Adapter\n" ); |
| 451 | aprint_normal(": ACPI Display Adapter\n" ); |
| 452 | |
| 453 | asc->sc_node = ad; |
| 454 | asc->sc_dev = self; |
| 455 | asc->sc_log = NULL; |
| 456 | |
| 457 | mutex_init(&asc->sc_mtx, MUTEX_DEFAULT, IPL_NONE); |
| 458 | |
| 459 | asc->sc_caps = acpidisp_vga_capabilities(ad); |
| 460 | asc->sc_policy = acpidisp_default_bios_policy; |
| 461 | asc->sc_odinfo = NULL; |
| 462 | |
| 463 | acpidisp_vga_print_capabilities(self, asc->sc_caps); |
| 464 | |
| 465 | /* |
| 466 | * Enumerate connected output devices, attach |
| 467 | * output display devices, and bind the attached |
| 468 | * output devices to the enumerated ones. |
| 469 | */ |
| 470 | asc->sc_odinfo = acpidisp_init_odinfo(asc); |
| 471 | |
| 472 | acpidisp_vga_scan_outdevs(asc); |
| 473 | |
| 474 | if (asc->sc_odinfo != NULL) { |
| 475 | acpidisp_vga_bind_outdevs(asc); |
| 476 | acpidisp_print_odinfo(self, asc->sc_odinfo); |
| 477 | } |
| 478 | |
| 479 | /* |
| 480 | * Set BIOS automatic switch policy. |
| 481 | * |
| 482 | * Many laptops do not support output device switching with |
| 483 | * the methods specified in the ACPI extensions for display |
| 484 | * adapters. Therefore, we leave the BIOS output switch policy |
| 485 | * on "auto" instead of setting it to "normal". |
| 486 | */ |
| 487 | asc->sc_policy.fmt.output = ACPI_DISP_POLICY_OUTPUT_AUTO; |
| 488 | asc->sc_policy.fmt.brightness = ACPI_DISP_POLICY_BRIGHTNESS_NORMAL; |
| 489 | |
| 490 | if (acpidisp_set_policy(asc, asc->sc_policy.raw)) |
| 491 | asc->sc_policy = acpidisp_default_bios_policy; |
| 492 | |
| 493 | acpidisp_vga_sysctl_setup(asc); |
| 494 | |
| 495 | (void)pmf_device_register(self, NULL, acpidisp_vga_resume); |
| 496 | (void)acpi_register_notify(asc->sc_node, acpidisp_vga_notify_handler); |
| 497 | } |
| 498 | |
| 499 | static int |
| 500 | acpidisp_vga_detach(device_t self, int flags) |
| 501 | { |
| 502 | struct acpidisp_vga_softc *asc = device_private(self); |
| 503 | struct acpidisp_odinfo *oi = asc->sc_odinfo; |
| 504 | int rc; |
| 505 | |
| 506 | pmf_device_deregister(self); |
| 507 | |
| 508 | if (asc->sc_log != NULL) |
| 509 | sysctl_teardown(&asc->sc_log); |
| 510 | |
| 511 | asc->sc_policy = acpidisp_default_bios_policy; |
| 512 | acpidisp_set_policy(asc, asc->sc_policy.raw); |
| 513 | |
| 514 | acpi_deregister_notify(asc->sc_node); |
| 515 | |
| 516 | if ((rc = config_detach_children(self, flags)) != 0) |
| 517 | return rc; |
| 518 | |
| 519 | if (oi != NULL) { |
| 520 | kmem_free(oi->oi_dev, |
| 521 | oi->oi_dev_count * sizeof(*oi->oi_dev)); |
| 522 | kmem_free(oi, sizeof(*oi)); |
| 523 | } |
| 524 | |
| 525 | mutex_destroy(&asc->sc_mtx); |
| 526 | |
| 527 | return 0; |
| 528 | } |
| 529 | |
| 530 | void |
| 531 | acpidisp_vga_childdetached(device_t self, device_t child) |
| 532 | { |
| 533 | struct acpidisp_vga_softc *asc = device_private(self); |
| 534 | struct acpidisp_odinfo *oi = asc->sc_odinfo; |
| 535 | struct acpidisp_outdev *od; |
| 536 | struct acpi_devnode *ad; |
| 537 | uint32_t i; |
| 538 | |
| 539 | SIMPLEQ_FOREACH(ad, &asc->sc_node->ad_child_head, ad_child_list) { |
| 540 | |
| 541 | if (ad->ad_device == child) |
| 542 | ad->ad_device = NULL; |
| 543 | } |
| 544 | |
| 545 | if (oi == NULL) |
| 546 | return; |
| 547 | |
| 548 | for (i = 0, od = oi->oi_dev; i < oi->oi_dev_count; i++, od++) { |
| 549 | if (od->od_device == child) |
| 550 | od->od_device = NULL; |
| 551 | } |
| 552 | } |
| 553 | |
| 554 | /* |
| 555 | * Attachment of acpiout under acpivga. |
| 556 | */ |
| 557 | |
| 558 | static void |
| 559 | acpidisp_vga_scan_outdevs(struct acpidisp_vga_softc *asc) |
| 560 | { |
| 561 | struct acpidisp_acpivga_attach_args aa; |
| 562 | struct acpi_devnode *ad; |
| 563 | |
| 564 | /* |
| 565 | * Display output devices are ACPI children of the display adapter. |
| 566 | */ |
| 567 | SIMPLEQ_FOREACH(ad, &asc->sc_node->ad_child_head, ad_child_list) { |
| 568 | |
| 569 | if (ad->ad_device != NULL) /* This should not happen. */ |
| 570 | continue; |
| 571 | |
| 572 | aa.aa_node = ad; |
| 573 | aa.aa_mtx = &asc->sc_mtx; |
| 574 | |
| 575 | ad->ad_device = config_found_ia(asc->sc_dev, |
| 576 | "acpivga" , &aa, acpidisp_acpivga_print); |
| 577 | } |
| 578 | } |
| 579 | |
| 580 | static int |
| 581 | acpidisp_acpivga_print(void *aux, const char *pnp) |
| 582 | { |
| 583 | struct acpidisp_acpivga_attach_args *aa = aux; |
| 584 | struct acpi_devnode *ad = aa->aa_node; |
| 585 | |
| 586 | if (pnp) { |
| 587 | aprint_normal("%s at %s" , ad->ad_name, pnp); |
| 588 | } else { |
| 589 | aprint_normal(" (%s" , ad->ad_name); |
| 590 | if (ad->ad_devinfo->Valid & ACPI_VALID_ADR) |
| 591 | aprint_normal(", 0x%04" PRIx64, ad->ad_devinfo->Address); |
| 592 | aprint_normal(")" ); |
| 593 | } |
| 594 | |
| 595 | return UNCONF; |
| 596 | } |
| 597 | |
| 598 | /* |
| 599 | * Autoconfiguration for the acpiout driver. |
| 600 | */ |
| 601 | |
| 602 | static int |
| 603 | acpidisp_out_match(device_t parent, cfdata_t match, void *aux) |
| 604 | { |
| 605 | struct acpidisp_acpivga_attach_args *aa = aux; |
| 606 | struct acpi_devnode *ad = aa->aa_node; |
| 607 | |
| 608 | if (ad->ad_type != ACPI_TYPE_DEVICE) |
| 609 | return 0; |
| 610 | |
| 611 | /* |
| 612 | * The method _ADR is required for display output |
| 613 | * devices (ACPI 4.0a, Sec. B.6.1). |
| 614 | */ |
| 615 | if (!(acpidisp_has_method(ad->ad_handle, "_ADR" , ACPI_TYPE_INTEGER))) |
| 616 | return 0; |
| 617 | |
| 618 | return 1; |
| 619 | } |
| 620 | |
| 621 | static void |
| 622 | acpidisp_out_attach(device_t parent, device_t self, void *aux) |
| 623 | { |
| 624 | struct acpidisp_out_softc *osc = device_private(self); |
| 625 | struct acpidisp_acpivga_attach_args *aa = aux; |
| 626 | struct acpi_devnode *ad = aa->aa_node; |
| 627 | struct acpidisp_brctl *bc; |
| 628 | |
| 629 | aprint_naive("\n" ); |
| 630 | aprint_normal(": ACPI Display Output Device\n" ); |
| 631 | |
| 632 | osc->sc_dev = self; |
| 633 | osc->sc_node = ad; |
| 634 | osc->sc_log = NULL; |
| 635 | osc->sc_mtx = aa->aa_mtx; |
| 636 | osc->sc_caps = acpidisp_out_capabilities(ad); |
| 637 | osc->sc_brctl = NULL; |
| 638 | |
| 639 | acpidisp_out_print_capabilities(self, osc->sc_caps); |
| 640 | |
| 641 | osc->sc_brctl = acpidisp_init_brctl(osc); |
| 642 | bc = osc->sc_brctl; |
| 643 | if (bc != NULL) { |
| 644 | bc->bc_current = bc->bc_level[bc->bc_level_count - 1]; |
| 645 | |
| 646 | /* |
| 647 | * Synchronize ACPI and driver brightness levels, and |
| 648 | * check that brightness control is working. |
| 649 | */ |
| 650 | (void)acpidisp_get_brightness(osc, &bc->bc_current); |
| 651 | if (acpidisp_set_brightness(osc, bc->bc_current)) { |
| 652 | kmem_free(bc->bc_level, |
| 653 | bc->bc_level_count * sizeof(*bc->bc_level)); |
| 654 | kmem_free(bc, sizeof(*bc)); |
| 655 | osc->sc_brctl = NULL; |
| 656 | } else { |
| 657 | acpidisp_print_brctl(self, osc->sc_brctl); |
| 658 | } |
| 659 | } |
| 660 | |
| 661 | /* Install ACPI notify handler. */ |
| 662 | (void)acpi_register_notify(osc->sc_node, acpidisp_out_notify_handler); |
| 663 | |
| 664 | /* Setup sysctl. */ |
| 665 | acpidisp_out_sysctl_setup(osc); |
| 666 | |
| 667 | /* Power management. */ |
| 668 | if (!pmf_device_register(self, acpidisp_out_suspend, |
| 669 | acpidisp_out_resume)) |
| 670 | aprint_error_dev(self, "couldn't establish power handler\n" ); |
| 671 | } |
| 672 | |
| 673 | static int |
| 674 | acpidisp_out_detach(device_t self, int flags) |
| 675 | { |
| 676 | struct acpidisp_out_softc *osc = device_private(self); |
| 677 | struct acpidisp_brctl *bc = osc->sc_brctl; |
| 678 | |
| 679 | pmf_device_deregister(self); |
| 680 | |
| 681 | if (osc->sc_log != NULL) |
| 682 | sysctl_teardown(&osc->sc_log); |
| 683 | |
| 684 | acpi_deregister_notify(osc->sc_node); |
| 685 | |
| 686 | if (bc != NULL) { |
| 687 | kmem_free(bc->bc_level, |
| 688 | bc->bc_level_count * sizeof(*bc->bc_level)); |
| 689 | kmem_free(bc, sizeof(*bc)); |
| 690 | } |
| 691 | |
| 692 | return 0; |
| 693 | } |
| 694 | |
| 695 | /* |
| 696 | * Power management. |
| 697 | */ |
| 698 | |
| 699 | static bool |
| 700 | acpidisp_vga_resume(device_t self, const pmf_qual_t *qual) |
| 701 | { |
| 702 | struct acpidisp_vga_softc *asc = device_private(self); |
| 703 | |
| 704 | mutex_enter(&asc->sc_mtx); |
| 705 | (void)acpidisp_set_policy(asc, asc->sc_policy.raw); |
| 706 | mutex_exit(&asc->sc_mtx); |
| 707 | |
| 708 | return true; |
| 709 | } |
| 710 | |
| 711 | static bool |
| 712 | acpidisp_out_suspend(device_t self, const pmf_qual_t *qual) |
| 713 | { |
| 714 | struct acpidisp_out_softc *osc = device_private(self); |
| 715 | |
| 716 | mutex_enter(osc->sc_mtx); |
| 717 | if (osc->sc_brctl != NULL) |
| 718 | (void)acpidisp_get_brightness(osc, &osc->sc_brctl->bc_current); |
| 719 | mutex_exit(osc->sc_mtx); |
| 720 | |
| 721 | return true; |
| 722 | } |
| 723 | |
| 724 | static bool |
| 725 | acpidisp_out_resume(device_t self, const pmf_qual_t *qual) |
| 726 | { |
| 727 | struct acpidisp_out_softc *osc = device_private(self); |
| 728 | |
| 729 | mutex_enter(osc->sc_mtx); |
| 730 | if (osc->sc_brctl != NULL) |
| 731 | (void)acpidisp_set_brightness(osc, osc->sc_brctl->bc_current); |
| 732 | mutex_exit(osc->sc_mtx); |
| 733 | |
| 734 | return true; |
| 735 | } |
| 736 | |
| 737 | /* |
| 738 | * Capabilities (available methods). |
| 739 | */ |
| 740 | |
| 741 | static uint16_t |
| 742 | acpidisp_vga_capabilities(const struct acpi_devnode *ad) |
| 743 | { |
| 744 | uint16_t cap; |
| 745 | |
| 746 | cap = 0; |
| 747 | |
| 748 | if (acpidisp_has_method(ad->ad_handle, "_DOS" , ACPI_TYPE_METHOD)) |
| 749 | cap |= ACPI_DISP_VGA_CAP__DOS; |
| 750 | |
| 751 | if (acpidisp_has_method(ad->ad_handle, "_DOD" , ACPI_TYPE_PACKAGE)) |
| 752 | cap |= ACPI_DISP_VGA_CAP__DOD; |
| 753 | |
| 754 | if (acpidisp_has_method(ad->ad_handle, "_ROM" , ACPI_TYPE_BUFFER)) |
| 755 | cap |= ACPI_DISP_VGA_CAP__ROM; |
| 756 | |
| 757 | if (acpidisp_has_method(ad->ad_handle, "_GPD" , ACPI_TYPE_INTEGER)) |
| 758 | cap |= ACPI_DISP_VGA_CAP__GPD; |
| 759 | |
| 760 | if (acpidisp_has_method(ad->ad_handle, "_SPD" , ACPI_TYPE_METHOD)) |
| 761 | cap |= ACPI_DISP_VGA_CAP__SPD; |
| 762 | |
| 763 | if (acpidisp_has_method(ad->ad_handle, "_VPO" , ACPI_TYPE_INTEGER)) |
| 764 | cap |= ACPI_DISP_VGA_CAP__VPO; |
| 765 | |
| 766 | return cap; |
| 767 | } |
| 768 | |
| 769 | static void |
| 770 | acpidisp_vga_print_capabilities(device_t self, uint16_t cap) |
| 771 | { |
| 772 | aprint_debug_dev(self, "capabilities:%s%s%s%s%s%s\n" , |
| 773 | (cap & ACPI_DISP_VGA_CAP__DOS) ? " _DOS" : "" , |
| 774 | (cap & ACPI_DISP_VGA_CAP__DOD) ? " _DOD" : "" , |
| 775 | (cap & ACPI_DISP_VGA_CAP__ROM) ? " _ROM" : "" , |
| 776 | (cap & ACPI_DISP_VGA_CAP__GPD) ? " _GPD" : "" , |
| 777 | (cap & ACPI_DISP_VGA_CAP__SPD) ? " _SPD" : "" , |
| 778 | (cap & ACPI_DISP_VGA_CAP__VPO) ? " _VPO" : "" ); |
| 779 | } |
| 780 | |
| 781 | static uint16_t |
| 782 | acpidisp_out_capabilities(const struct acpi_devnode *ad) |
| 783 | { |
| 784 | uint16_t cap; |
| 785 | |
| 786 | cap = 0; |
| 787 | |
| 788 | /* List of Brigthness levels */ |
| 789 | if (acpidisp_has_method(ad->ad_handle, "_BCL" , ACPI_TYPE_PACKAGE)) |
| 790 | cap |= ACPI_DISP_OUT_CAP__BCL; |
| 791 | |
| 792 | /* Set brightness level */ |
| 793 | if (acpidisp_has_method(ad->ad_handle, "_BCM" , ACPI_TYPE_METHOD)) |
| 794 | cap |= ACPI_DISP_OUT_CAP__BCM; |
| 795 | |
| 796 | /* Get brightless level */ |
| 797 | if (acpidisp_has_method(ad->ad_handle, "_BQC" , ACPI_TYPE_INTEGER)) |
| 798 | cap |= ACPI_DISP_OUT_CAP__BQC; |
| 799 | |
| 800 | /* Return EDID */ |
| 801 | if (acpidisp_has_method(ad->ad_handle, "_DDC" , ACPI_TYPE_METHOD)) |
| 802 | cap |= ACPI_DISP_OUT_CAP__DDC; |
| 803 | |
| 804 | /* Get Status */ |
| 805 | if (acpidisp_has_method(ad->ad_handle, "_DCS" , ACPI_TYPE_INTEGER)) |
| 806 | cap |= ACPI_DISP_OUT_CAP__DCS; |
| 807 | |
| 808 | /* Get Graphics State */ |
| 809 | if (acpidisp_has_method(ad->ad_handle, "_DGS" , ACPI_TYPE_INTEGER)) |
| 810 | cap |= ACPI_DISP_OUT_CAP__DGS; |
| 811 | |
| 812 | /* Set Graphics State */ |
| 813 | if (acpidisp_has_method(ad->ad_handle, "_DSS" , ACPI_TYPE_METHOD)) |
| 814 | cap |= ACPI_DISP_OUT_CAP__DSS; |
| 815 | |
| 816 | return cap; |
| 817 | } |
| 818 | |
| 819 | static void |
| 820 | acpidisp_out_print_capabilities(device_t self, uint16_t cap) |
| 821 | { |
| 822 | aprint_debug_dev(self, "capabilities:%s%s%s%s%s%s%s\n" , |
| 823 | (cap & ACPI_DISP_OUT_CAP__BCL) ? " _BCL" : "" , |
| 824 | (cap & ACPI_DISP_OUT_CAP__BCM) ? " _BCM" : "" , |
| 825 | (cap & ACPI_DISP_OUT_CAP__BQC) ? " _BQC" : "" , |
| 826 | (cap & ACPI_DISP_OUT_CAP__DDC) ? " _DDC" : "" , |
| 827 | (cap & ACPI_DISP_OUT_CAP__DCS) ? " _DCS" : "" , |
| 828 | (cap & ACPI_DISP_OUT_CAP__DGS) ? " _DGS" : "" , |
| 829 | (cap & ACPI_DISP_OUT_CAP__DSS) ? " _DSS" : "" ); |
| 830 | } |
| 831 | |
| 832 | /* |
| 833 | * ACPI notify handlers. |
| 834 | */ |
| 835 | |
| 836 | static void |
| 837 | acpidisp_vga_notify_handler(ACPI_HANDLE handle, uint32_t notify, |
| 838 | void *context) |
| 839 | { |
| 840 | struct acpidisp_vga_softc *asc = device_private(context); |
| 841 | ACPI_OSD_EXEC_CALLBACK callback; |
| 842 | |
| 843 | callback = NULL; |
| 844 | |
| 845 | switch (notify) { |
| 846 | case ACPI_NOTIFY_CycleOutputDevice: |
| 847 | callback = acpidisp_vga_cycle_output_device_callback; |
| 848 | break; |
| 849 | case ACPI_NOTIFY_OutputDeviceStatusChange: |
| 850 | callback = acpidisp_vga_output_device_change_callback; |
| 851 | break; |
| 852 | case ACPI_NOTIFY_CycleDisplayOutputHotkeyPressed: |
| 853 | case ACPI_NOTIFY_NextDisplayOutputHotkeyPressed: |
| 854 | case ACPI_NOTIFY_PreviousDisplayOutputHotkeyPressed: |
| 855 | aprint_debug_dev(asc->sc_dev, |
| 856 | "unhandled notify: 0x%" PRIx32"\n" , notify); |
| 857 | return; |
| 858 | default: |
| 859 | aprint_error_dev(asc->sc_dev, |
| 860 | "unknown notify: 0x%" PRIx32"\n" , notify); |
| 861 | return; |
| 862 | } |
| 863 | |
| 864 | KASSERT(callback != NULL); |
| 865 | (void)AcpiOsExecute(OSL_NOTIFY_HANDLER, callback, asc); |
| 866 | } |
| 867 | |
| 868 | static void |
| 869 | acpidisp_out_notify_handler(ACPI_HANDLE handle, uint32_t notify, |
| 870 | void *context) |
| 871 | { |
| 872 | struct acpidisp_out_softc *osc = device_private(context); |
| 873 | ACPI_OSD_EXEC_CALLBACK callback; |
| 874 | |
| 875 | callback = NULL; |
| 876 | |
| 877 | switch (notify) { |
| 878 | case ACPI_NOTIFY_IncreaseBrightness: |
| 879 | callback = acpidisp_out_increase_brightness_callback; |
| 880 | break; |
| 881 | case ACPI_NOTIFY_DecreaseBrightness: |
| 882 | callback = acpidisp_out_decrease_brightness_callback; |
| 883 | break; |
| 884 | case ACPI_NOTIFY_CycleBrightness: |
| 885 | callback = acpidisp_out_cycle_brightness_callback; |
| 886 | break; |
| 887 | case ACPI_NOTIFY_ZeroBrightness: |
| 888 | callback = acpidisp_out_zero_brightness_callback; |
| 889 | break; |
| 890 | case ACPI_NOTIFY_DisplayDeviceOff: |
| 891 | aprint_debug_dev(osc->sc_dev, |
| 892 | "unhandled notify: 0x%" PRIx32"\n" , notify); |
| 893 | return; |
| 894 | default: |
| 895 | aprint_error_dev(osc->sc_dev, |
| 896 | "unknown notify: 0x%" PRIx32"\n" , notify); |
| 897 | return; |
| 898 | } |
| 899 | |
| 900 | KASSERT(callback != NULL); |
| 901 | (void)AcpiOsExecute(OSL_NOTIFY_HANDLER, callback, osc); |
| 902 | } |
| 903 | |
| 904 | /* |
| 905 | * ACPI notify callbacks. |
| 906 | * |
| 907 | * Exclusive access to the sc_odinfo field of struct acpidisp_vga_softc is |
| 908 | * guaranteed since: |
| 909 | * |
| 910 | * (a) this field is only used in ACPI display notify callbacks, |
| 911 | * (b) ACPI display notify callbacks are scheduled with AcpiOsExecute, |
| 912 | * (c) callbacks scheduled with AcpiOsExecute are executed sequentially. |
| 913 | */ |
| 914 | |
| 915 | static void |
| 916 | acpidisp_vga_cycle_output_device_callback(void *arg) |
| 917 | { |
| 918 | struct acpidisp_vga_softc *asc = arg; |
| 919 | struct acpidisp_odinfo *oi = asc->sc_odinfo; |
| 920 | struct acpidisp_outdev *od; |
| 921 | struct acpidisp_out_softc *osc, *last_osc; |
| 922 | acpidisp_od_state_t state, last_state; |
| 923 | acpidisp_od_status_t status; |
| 924 | acpidisp_bios_policy_t lock_policy; |
| 925 | uint32_t i; |
| 926 | |
| 927 | if (oi == NULL) |
| 928 | return; |
| 929 | |
| 930 | /* Mutual exclusion with callbacks of connected output devices. */ |
| 931 | mutex_enter(&asc->sc_mtx); |
| 932 | |
| 933 | /* Lock the _DGS values. */ |
| 934 | lock_policy = asc->sc_policy; |
| 935 | lock_policy.fmt.output = ACPI_DISP_POLICY_OUTPUT_LOCKED; |
| 936 | (void)acpidisp_set_policy(asc, lock_policy.raw); |
| 937 | |
| 938 | last_osc = NULL; |
| 939 | for (i = 0, od = oi->oi_dev; i < oi->oi_dev_count; i++, od++) { |
| 940 | if (od->od_device == NULL) |
| 941 | continue; |
| 942 | osc = device_private(od->od_device); |
| 943 | |
| 944 | if (!(osc->sc_caps & ACPI_DISP_OUT_CAP__DSS)) |
| 945 | continue; |
| 946 | if (acpidisp_get_state(osc, &state.raw)) |
| 947 | continue; |
| 948 | |
| 949 | if (acpidisp_get_status(osc, &status.raw)) { |
| 950 | state.fmt.no_switch = 0; |
| 951 | } else { |
| 952 | state.fmt.active &= status.fmt.ready; |
| 953 | |
| 954 | if (state.fmt.active == status.fmt.activated) |
| 955 | state.fmt.no_switch = 1; |
| 956 | else |
| 957 | state.fmt.no_switch = 0; |
| 958 | } |
| 959 | |
| 960 | state.fmt.commit = 0; |
| 961 | |
| 962 | if (last_osc != NULL) |
| 963 | (void)acpidisp_set_state(last_osc, last_state.raw); |
| 964 | |
| 965 | last_osc = osc; |
| 966 | last_state = state; |
| 967 | } |
| 968 | |
| 969 | if (last_osc != NULL) { |
| 970 | last_state.fmt.commit = 1; |
| 971 | (void)acpidisp_set_state(last_osc, last_state.raw); |
| 972 | } |
| 973 | |
| 974 | /* Restore the original BIOS policy. */ |
| 975 | (void)acpidisp_set_policy(asc, asc->sc_policy.raw); |
| 976 | |
| 977 | mutex_exit(&asc->sc_mtx); |
| 978 | } |
| 979 | |
| 980 | static void |
| 981 | acpidisp_vga_output_device_change_callback(void *arg) |
| 982 | { |
| 983 | struct acpidisp_vga_softc *asc = arg; |
| 984 | struct acpidisp_odinfo *oi = asc->sc_odinfo; |
| 985 | bool switch_outputs; |
| 986 | |
| 987 | if (oi != NULL) { |
| 988 | kmem_free(oi->oi_dev, |
| 989 | oi->oi_dev_count * sizeof(*oi->oi_dev)); |
| 990 | kmem_free(oi, sizeof(*oi)); |
| 991 | } |
| 992 | |
| 993 | asc->sc_odinfo = acpidisp_init_odinfo(asc); |
| 994 | if (asc->sc_odinfo != NULL) { |
| 995 | acpidisp_vga_bind_outdevs(asc); |
| 996 | acpidisp_print_odinfo(asc->sc_dev, asc->sc_odinfo); |
| 997 | } |
| 998 | |
| 999 | /* Perform display output switch if needed. */ |
| 1000 | mutex_enter(&asc->sc_mtx); |
| 1001 | switch_outputs = |
| 1002 | (asc->sc_policy.fmt.output == ACPI_DISP_POLICY_OUTPUT_NORMAL); |
| 1003 | mutex_exit(&asc->sc_mtx); |
| 1004 | if (switch_outputs) |
| 1005 | acpidisp_vga_cycle_output_device_callback(arg); |
| 1006 | } |
| 1007 | |
| 1008 | static void |
| 1009 | acpidisp_out_increase_brightness_callback(void *arg) |
| 1010 | { |
| 1011 | struct acpidisp_out_softc *osc = arg; |
| 1012 | struct acpidisp_brctl *bc = osc->sc_brctl; |
| 1013 | uint8_t lo, up; |
| 1014 | |
| 1015 | if (bc == NULL) { |
| 1016 | /* Fallback to pmf(9). */ |
| 1017 | pmf_event_inject(NULL, PMFE_DISPLAY_BRIGHTNESS_UP); |
| 1018 | return; |
| 1019 | } |
| 1020 | |
| 1021 | mutex_enter(osc->sc_mtx); |
| 1022 | |
| 1023 | (void)acpidisp_get_brightness(osc, &bc->bc_current); |
| 1024 | |
| 1025 | acpidisp_array_search(bc->bc_level, bc->bc_level_count, |
| 1026 | bc->bc_current + ACPI_DISP_BRCTL_STEP, &lo, &up); |
| 1027 | |
| 1028 | bc->bc_current = up; |
| 1029 | (void)acpidisp_set_brightness(osc, bc->bc_current); |
| 1030 | |
| 1031 | mutex_exit(osc->sc_mtx); |
| 1032 | } |
| 1033 | |
| 1034 | static void |
| 1035 | acpidisp_out_decrease_brightness_callback(void *arg) |
| 1036 | { |
| 1037 | struct acpidisp_out_softc *osc = arg; |
| 1038 | struct acpidisp_brctl *bc = osc->sc_brctl; |
| 1039 | uint8_t lo, up; |
| 1040 | |
| 1041 | if (bc == NULL) { |
| 1042 | /* Fallback to pmf(9). */ |
| 1043 | pmf_event_inject(NULL, PMFE_DISPLAY_BRIGHTNESS_DOWN); |
| 1044 | return; |
| 1045 | } |
| 1046 | |
| 1047 | mutex_enter(osc->sc_mtx); |
| 1048 | |
| 1049 | (void)acpidisp_get_brightness(osc, &bc->bc_current); |
| 1050 | |
| 1051 | acpidisp_array_search(bc->bc_level, bc->bc_level_count, |
| 1052 | bc->bc_current - ACPI_DISP_BRCTL_STEP, &lo, &up); |
| 1053 | |
| 1054 | bc->bc_current = lo; |
| 1055 | (void)acpidisp_set_brightness(osc, bc->bc_current); |
| 1056 | |
| 1057 | mutex_exit(osc->sc_mtx); |
| 1058 | } |
| 1059 | |
| 1060 | static void |
| 1061 | acpidisp_out_cycle_brightness_callback(void *arg) |
| 1062 | { |
| 1063 | struct acpidisp_out_softc *osc = arg; |
| 1064 | struct acpidisp_brctl *bc = osc->sc_brctl; |
| 1065 | uint8_t lo, up; |
| 1066 | |
| 1067 | if (bc == NULL) { |
| 1068 | /* No fallback. */ |
| 1069 | return; |
| 1070 | } |
| 1071 | |
| 1072 | mutex_enter(osc->sc_mtx); |
| 1073 | |
| 1074 | (void)acpidisp_get_brightness(osc, &bc->bc_current); |
| 1075 | |
| 1076 | if (bc->bc_current >= bc->bc_level[bc->bc_level_count - 1]) { |
| 1077 | bc->bc_current = bc->bc_level[0]; |
| 1078 | } else { |
| 1079 | acpidisp_array_search(bc->bc_level, bc->bc_level_count, |
| 1080 | bc->bc_current + 1, &lo, &up); |
| 1081 | bc->bc_current = up; |
| 1082 | } |
| 1083 | |
| 1084 | (void)acpidisp_set_brightness(osc, bc->bc_current); |
| 1085 | |
| 1086 | mutex_exit(osc->sc_mtx); |
| 1087 | } |
| 1088 | |
| 1089 | static void |
| 1090 | acpidisp_out_zero_brightness_callback(void *arg) |
| 1091 | { |
| 1092 | struct acpidisp_out_softc *osc = arg; |
| 1093 | struct acpidisp_brctl *bc = osc->sc_brctl; |
| 1094 | |
| 1095 | if (bc == NULL) { |
| 1096 | /* Fallback to pmf(9). */ |
| 1097 | /* XXX Is this the intended meaning of PMFE_DISPLAY_REDUCED? */ |
| 1098 | pmf_event_inject(NULL, PMFE_DISPLAY_REDUCED); |
| 1099 | return; |
| 1100 | } |
| 1101 | |
| 1102 | mutex_enter(osc->sc_mtx); |
| 1103 | |
| 1104 | bc->bc_current = bc->bc_level[0]; |
| 1105 | (void)acpidisp_set_brightness(osc, bc->bc_current); |
| 1106 | |
| 1107 | mutex_exit(osc->sc_mtx); |
| 1108 | } |
| 1109 | |
| 1110 | /* |
| 1111 | * Sysctl setup. |
| 1112 | */ |
| 1113 | |
| 1114 | static void |
| 1115 | acpidisp_vga_sysctl_setup(struct acpidisp_vga_softc *asc) |
| 1116 | { |
| 1117 | const struct sysctlnode *rnode; |
| 1118 | |
| 1119 | if (asc->sc_caps & ACPI_DISP_VGA_CAP__DOS) { |
| 1120 | if ((sysctl_createv(&asc->sc_log, 0, NULL, &rnode, |
| 1121 | 0, CTLTYPE_NODE, "acpi" , NULL, |
| 1122 | NULL, 0, NULL, 0, |
| 1123 | CTL_HW, CTL_CREATE, CTL_EOL)) != 0) |
| 1124 | goto fail; |
| 1125 | |
| 1126 | if ((sysctl_createv(&asc->sc_log, 0, &rnode, &rnode, |
| 1127 | 0, CTLTYPE_NODE, device_xname(asc->sc_dev), |
| 1128 | SYSCTL_DESCR("ACPI display adapter controls" ), |
| 1129 | NULL, 0, NULL, 0, |
| 1130 | CTL_CREATE, CTL_EOL)) != 0) |
| 1131 | goto fail; |
| 1132 | |
| 1133 | #ifdef ACPI_DEBUG |
| 1134 | (void)sysctl_createv(&asc->sc_log, 0, &rnode, NULL, |
| 1135 | CTLFLAG_READWRITE | CTLFLAG_HEX, CTLTYPE_INT, "bios_policy" , |
| 1136 | SYSCTL_DESCR("Current BIOS switch policies (debug)" ), |
| 1137 | acpidisp_vga_sysctl_policy, 0, (void *)asc, 0, |
| 1138 | CTL_CREATE, CTL_EOL); |
| 1139 | #endif |
| 1140 | |
| 1141 | (void)sysctl_createv(&asc->sc_log, 0, &rnode, NULL, |
| 1142 | CTLFLAG_READWRITE, CTLTYPE_BOOL, "bios_switch" , |
| 1143 | SYSCTL_DESCR("Current BIOS output switching policy" ), |
| 1144 | acpidisp_vga_sysctl_policy_output, 0, (void *)asc, 0, |
| 1145 | CTL_CREATE, CTL_EOL); |
| 1146 | } |
| 1147 | |
| 1148 | return; |
| 1149 | |
| 1150 | fail: |
| 1151 | aprint_error_dev(asc->sc_dev, "couldn't add sysctl nodes\n" ); |
| 1152 | } |
| 1153 | |
| 1154 | static void |
| 1155 | acpidisp_out_sysctl_setup(struct acpidisp_out_softc *osc) |
| 1156 | { |
| 1157 | const struct sysctlnode *rnode; |
| 1158 | |
| 1159 | #ifdef ACPI_DISP_SWITCH_SYSCTLS |
| 1160 | if ((osc->sc_brctl != NULL) || |
| 1161 | (osc->sc_caps & ACPI_DISP_OUT_CAP__DCS) || |
| 1162 | (osc->sc_caps & ACPI_DISP_OUT_CAP__DGS)) { |
| 1163 | #else |
| 1164 | if (osc->sc_brctl != NULL) { |
| 1165 | #endif |
| 1166 | if ((sysctl_createv(&osc->sc_log, 0, NULL, &rnode, |
| 1167 | 0, CTLTYPE_NODE, "acpi" , NULL, |
| 1168 | NULL, 0, NULL, 0, |
| 1169 | CTL_HW, CTL_CREATE, CTL_EOL)) != 0) |
| 1170 | goto fail; |
| 1171 | |
| 1172 | if ((sysctl_createv(&osc->sc_log, 0, &rnode, &rnode, |
| 1173 | 0, CTLTYPE_NODE, device_xname(osc->sc_dev), |
| 1174 | SYSCTL_DESCR("ACPI display output device controls" ), |
| 1175 | NULL, 0, NULL, 0, |
| 1176 | CTL_CREATE, CTL_EOL)) != 0) |
| 1177 | goto fail; |
| 1178 | } |
| 1179 | |
| 1180 | if (osc->sc_brctl != NULL) { |
| 1181 | (void)sysctl_createv(&osc->sc_log, 0, &rnode, NULL, |
| 1182 | CTLFLAG_READWRITE, CTLTYPE_INT, "brightness" , |
| 1183 | SYSCTL_DESCR("Current brightness level" ), |
| 1184 | acpidisp_out_sysctl_brightness, 0, (void *)osc, 0, |
| 1185 | CTL_CREATE, CTL_EOL); |
| 1186 | } |
| 1187 | |
| 1188 | #ifdef ACPI_DISP_SWITCH_SYSCTLS |
| 1189 | if (osc->sc_caps & ACPI_DISP_OUT_CAP__DCS) { |
| 1190 | (void)sysctl_createv(&osc->sc_log, 0, &rnode, NULL, |
| 1191 | CTLFLAG_READONLY | CTLFLAG_HEX, CTLTYPE_INT, "status" , |
| 1192 | SYSCTL_DESCR("Current status" ), |
| 1193 | acpidisp_out_sysctl_status, 0, (void *)osc, 0, |
| 1194 | CTL_CREATE, CTL_EOL); |
| 1195 | } |
| 1196 | |
| 1197 | if (osc->sc_caps & ACPI_DISP_OUT_CAP__DGS) { |
| 1198 | int access; |
| 1199 | |
| 1200 | if (osc->sc_caps & ACPI_DISP_OUT_CAP__DSS) |
| 1201 | access = CTLFLAG_READWRITE; |
| 1202 | else |
| 1203 | access = CTLFLAG_READONLY; |
| 1204 | |
| 1205 | (void)sysctl_createv(&osc->sc_log, 0, &rnode, NULL, |
| 1206 | access | CTLFLAG_HEX, CTLTYPE_INT, "state" , |
| 1207 | SYSCTL_DESCR("Next state (active or inactive)" ), |
| 1208 | acpidisp_out_sysctl_state, 0, (void *)osc, 0, |
| 1209 | CTL_CREATE, CTL_EOL); |
| 1210 | } |
| 1211 | #endif |
| 1212 | |
| 1213 | return; |
| 1214 | |
| 1215 | fail: |
| 1216 | aprint_error_dev(osc->sc_dev, "couldn't add sysctl nodes\n" ); |
| 1217 | } |
| 1218 | |
| 1219 | /* |
| 1220 | * Sysctl callbacks. |
| 1221 | */ |
| 1222 | |
| 1223 | #ifdef ACPI_DEBUG |
| 1224 | static int |
| 1225 | acpidisp_vga_sysctl_policy(SYSCTLFN_ARGS) |
| 1226 | { |
| 1227 | struct sysctlnode node; |
| 1228 | struct acpidisp_vga_softc *asc; |
| 1229 | uint32_t val; |
| 1230 | int error; |
| 1231 | |
| 1232 | node = *rnode; |
| 1233 | asc = node.sysctl_data; |
| 1234 | |
| 1235 | mutex_enter(&asc->sc_mtx); |
| 1236 | val = (uint32_t)asc->sc_policy.raw; |
| 1237 | mutex_exit(&asc->sc_mtx); |
| 1238 | |
| 1239 | node.sysctl_data = &val; |
| 1240 | error = sysctl_lookup(SYSCTLFN_CALL(&node)); |
| 1241 | if (error || newp == NULL) |
| 1242 | return error; |
| 1243 | |
| 1244 | if (val > 0x7) |
| 1245 | return EINVAL; |
| 1246 | |
| 1247 | mutex_enter(&asc->sc_mtx); |
| 1248 | asc->sc_policy.raw = (uint8_t)val; |
| 1249 | error = acpidisp_set_policy(asc, asc->sc_policy.raw); |
| 1250 | mutex_exit(&asc->sc_mtx); |
| 1251 | |
| 1252 | return error; |
| 1253 | } |
| 1254 | #endif |
| 1255 | |
| 1256 | static int |
| 1257 | acpidisp_vga_sysctl_policy_output(SYSCTLFN_ARGS) |
| 1258 | { |
| 1259 | struct sysctlnode node; |
| 1260 | struct acpidisp_vga_softc *asc; |
| 1261 | bool val; |
| 1262 | int error; |
| 1263 | |
| 1264 | node = *rnode; |
| 1265 | asc = node.sysctl_data; |
| 1266 | |
| 1267 | mutex_enter(&asc->sc_mtx); |
| 1268 | val = (asc->sc_policy.fmt.output == ACPI_DISP_POLICY_OUTPUT_AUTO); |
| 1269 | mutex_exit(&asc->sc_mtx); |
| 1270 | |
| 1271 | node.sysctl_data = &val; |
| 1272 | error = sysctl_lookup(SYSCTLFN_CALL(&node)); |
| 1273 | if (error || newp == NULL) |
| 1274 | return error; |
| 1275 | |
| 1276 | mutex_enter(&asc->sc_mtx); |
| 1277 | if (val) |
| 1278 | asc->sc_policy.fmt.output = ACPI_DISP_POLICY_OUTPUT_AUTO; |
| 1279 | else |
| 1280 | asc->sc_policy.fmt.output = ACPI_DISP_POLICY_OUTPUT_NORMAL; |
| 1281 | error = acpidisp_set_policy(asc, asc->sc_policy.raw); |
| 1282 | mutex_exit(&asc->sc_mtx); |
| 1283 | |
| 1284 | return error; |
| 1285 | } |
| 1286 | |
| 1287 | #ifdef ACPI_DISP_SWITCH_SYSCTLS |
| 1288 | static int |
| 1289 | acpidisp_out_sysctl_status(SYSCTLFN_ARGS) |
| 1290 | { |
| 1291 | struct sysctlnode node; |
| 1292 | struct acpidisp_out_softc *osc; |
| 1293 | uint32_t val; |
| 1294 | int error; |
| 1295 | |
| 1296 | node = *rnode; |
| 1297 | osc = node.sysctl_data; |
| 1298 | |
| 1299 | mutex_enter(osc->sc_mtx); |
| 1300 | error = acpidisp_get_status(osc, &val); |
| 1301 | mutex_exit(osc->sc_mtx); |
| 1302 | |
| 1303 | if (error) |
| 1304 | return error; |
| 1305 | |
| 1306 | node.sysctl_data = &val; |
| 1307 | error = sysctl_lookup(SYSCTLFN_CALL(&node)); |
| 1308 | if (error || newp == NULL) |
| 1309 | return error; |
| 1310 | |
| 1311 | return 0; |
| 1312 | } |
| 1313 | |
| 1314 | static int |
| 1315 | acpidisp_out_sysctl_state(SYSCTLFN_ARGS) |
| 1316 | { |
| 1317 | struct sysctlnode node; |
| 1318 | struct acpidisp_out_softc *osc; |
| 1319 | uint32_t val; |
| 1320 | int error; |
| 1321 | |
| 1322 | node = *rnode; |
| 1323 | osc = node.sysctl_data; |
| 1324 | |
| 1325 | mutex_enter(osc->sc_mtx); |
| 1326 | error = acpidisp_get_state(osc, &val); |
| 1327 | mutex_exit(osc->sc_mtx); |
| 1328 | |
| 1329 | if (error) |
| 1330 | return error; |
| 1331 | |
| 1332 | node.sysctl_data = &val; |
| 1333 | error = sysctl_lookup(SYSCTLFN_CALL(&node)); |
| 1334 | if (error || newp == NULL) |
| 1335 | return error; |
| 1336 | |
| 1337 | mutex_enter(osc->sc_mtx); |
| 1338 | error = acpidisp_set_state(osc, val); |
| 1339 | mutex_exit(osc->sc_mtx); |
| 1340 | |
| 1341 | return error; |
| 1342 | } |
| 1343 | #endif |
| 1344 | |
| 1345 | static int |
| 1346 | acpidisp_out_sysctl_brightness(SYSCTLFN_ARGS) |
| 1347 | { |
| 1348 | struct sysctlnode node; |
| 1349 | struct acpidisp_out_softc *osc; |
| 1350 | struct acpidisp_brctl *bc; |
| 1351 | int val, error; |
| 1352 | uint8_t lo, up, level; |
| 1353 | |
| 1354 | node = *rnode; |
| 1355 | osc = node.sysctl_data; |
| 1356 | bc = osc->sc_brctl; |
| 1357 | |
| 1358 | KASSERT(bc != NULL); |
| 1359 | |
| 1360 | mutex_enter(osc->sc_mtx); |
| 1361 | (void)acpidisp_get_brightness(osc, &bc->bc_current); |
| 1362 | val = (int)bc->bc_current; |
| 1363 | mutex_exit(osc->sc_mtx); |
| 1364 | |
| 1365 | node.sysctl_data = &val; |
| 1366 | error = sysctl_lookup(SYSCTLFN_CALL(&node)); |
| 1367 | if (error || newp == NULL) |
| 1368 | return error; |
| 1369 | |
| 1370 | acpidisp_array_search(bc->bc_level, bc->bc_level_count, val, &lo, &up); |
| 1371 | if ((lo != up) && (val - lo) < (up - val)) |
| 1372 | level = lo; |
| 1373 | else |
| 1374 | level = up; |
| 1375 | |
| 1376 | mutex_enter(osc->sc_mtx); |
| 1377 | bc->bc_current = level; |
| 1378 | error = acpidisp_set_brightness(osc, bc->bc_current); |
| 1379 | mutex_exit(osc->sc_mtx); |
| 1380 | |
| 1381 | return error; |
| 1382 | } |
| 1383 | |
| 1384 | /* |
| 1385 | * Initialization of acpidisp_odinfo (_DOD) and acpidisp_brctl (_BCL). |
| 1386 | */ |
| 1387 | |
| 1388 | /* |
| 1389 | * Regarding _DOD (ACPI 4.0a, Sec. B.4.2): |
| 1390 | * |
| 1391 | * "The _DOD method returns a list of devices attached to the graphics adapter, |
| 1392 | * along with device-specific configuration information." |
| 1393 | * |
| 1394 | * "Every child device enumerated in the ACPI namespace under the graphics |
| 1395 | * adapter must be specified in this list of devices. Each display device |
| 1396 | * must have its own ID, which is unique with respect to any other attachable |
| 1397 | * devices enumerated." |
| 1398 | * |
| 1399 | * "Return value: a package containing a variable-length list of integers, |
| 1400 | * each of which contains the 32-bit device attribute of a child device." |
| 1401 | */ |
| 1402 | |
| 1403 | static struct acpidisp_odinfo * |
| 1404 | acpidisp_init_odinfo(const struct acpidisp_vga_softc *asc) |
| 1405 | { |
| 1406 | ACPI_HANDLE hdl = asc->sc_node->ad_handle; |
| 1407 | ACPI_STATUS rv; |
| 1408 | ACPI_OBJECT *pkg; |
| 1409 | struct acpidisp_odinfo *oi; |
| 1410 | struct acpidisp_outdev *devp; |
| 1411 | uint32_t count, i; |
| 1412 | |
| 1413 | if (!(asc->sc_caps & ACPI_DISP_VGA_CAP__DOD)) |
| 1414 | return NULL; |
| 1415 | |
| 1416 | oi = NULL; |
| 1417 | pkg = NULL; |
| 1418 | |
| 1419 | rv = acpidisp_eval_package(hdl, "_DOD" , &pkg, 1); |
| 1420 | if (ACPI_FAILURE(rv)) |
| 1421 | goto fail; |
| 1422 | |
| 1423 | /* |
| 1424 | * Allocate and fill the struct acpidisp_odinfo to be returned. |
| 1425 | */ |
| 1426 | oi = kmem_zalloc(sizeof(*oi), KM_SLEEP); |
| 1427 | if (oi == NULL) { |
| 1428 | rv = AE_NO_MEMORY; |
| 1429 | goto fail; |
| 1430 | } |
| 1431 | |
| 1432 | oi->oi_dev_count = pkg->Package.Count; |
| 1433 | |
| 1434 | oi->oi_dev = kmem_zalloc(oi->oi_dev_count * sizeof(*oi->oi_dev), |
| 1435 | KM_SLEEP); |
| 1436 | if (oi->oi_dev == NULL) { |
| 1437 | rv = AE_NO_MEMORY; |
| 1438 | goto fail; |
| 1439 | } |
| 1440 | |
| 1441 | /* |
| 1442 | * Fill the array oi->oi_dev. |
| 1443 | */ |
| 1444 | for (count = 0, i = 0; i < pkg->Package.Count; i++) { |
| 1445 | /* List of 32-bit integers (ACPI 4.0a, Sec. B.4.2). */ |
| 1446 | if (pkg->Package.Elements[i].Type != ACPI_TYPE_INTEGER || |
| 1447 | pkg->Package.Elements[i].Integer.Value > UINT32_MAX) |
| 1448 | continue; |
| 1449 | |
| 1450 | oi->oi_dev[count].od_attrs.raw = |
| 1451 | (uint32_t)pkg->Package.Elements[i].Integer.Value; |
| 1452 | count++; |
| 1453 | } |
| 1454 | |
| 1455 | if (count == 0) { |
| 1456 | rv = AE_BAD_DATA; |
| 1457 | goto fail; |
| 1458 | } |
| 1459 | |
| 1460 | ACPI_FREE(pkg); |
| 1461 | pkg = NULL; |
| 1462 | |
| 1463 | /* |
| 1464 | * Resize the array oi->oi_dev if needed. |
| 1465 | */ |
| 1466 | if (count < oi->oi_dev_count) { |
| 1467 | devp = kmem_alloc(count * sizeof(*devp), KM_SLEEP); |
| 1468 | if (devp == NULL) { |
| 1469 | rv = AE_NO_MEMORY; |
| 1470 | goto fail; |
| 1471 | } |
| 1472 | |
| 1473 | (void)memcpy(devp, oi->oi_dev, count * sizeof(*devp)); |
| 1474 | kmem_free(oi->oi_dev, oi->oi_dev_count * sizeof(*oi->oi_dev)); |
| 1475 | |
| 1476 | oi->oi_dev = devp; |
| 1477 | oi->oi_dev_count = count; |
| 1478 | } |
| 1479 | |
| 1480 | return oi; |
| 1481 | |
| 1482 | fail: |
| 1483 | aprint_error_dev(asc->sc_dev, "failed to evaluate %s.%s: %s\n" , |
| 1484 | acpi_name(hdl), "_DOD" , AcpiFormatException(rv)); |
| 1485 | if (pkg != NULL) |
| 1486 | ACPI_FREE(pkg); |
| 1487 | if (oi != NULL) { |
| 1488 | if (oi->oi_dev != NULL) |
| 1489 | kmem_free(oi->oi_dev, |
| 1490 | oi->oi_dev_count * sizeof(*oi->oi_dev)); |
| 1491 | kmem_free(oi, sizeof(*oi)); |
| 1492 | } |
| 1493 | return NULL; |
| 1494 | } |
| 1495 | |
| 1496 | /* |
| 1497 | * acpidisp_vga_bind_outdevs: |
| 1498 | * |
| 1499 | * Bind each acpiout device attached under an acpivga device to the |
| 1500 | * corresponding (_DOD enumerated) connected output device. |
| 1501 | */ |
| 1502 | static void |
| 1503 | acpidisp_vga_bind_outdevs(struct acpidisp_vga_softc *asc) |
| 1504 | { |
| 1505 | struct acpidisp_odinfo *oi = asc->sc_odinfo; |
| 1506 | struct acpidisp_out_softc *osc; |
| 1507 | struct acpidisp_outdev *od; |
| 1508 | struct acpi_devnode *ad; |
| 1509 | ACPI_HANDLE hdl; |
| 1510 | ACPI_INTEGER val; |
| 1511 | ACPI_STATUS rv; |
| 1512 | uint16_t devid; |
| 1513 | uint32_t i; |
| 1514 | |
| 1515 | KASSERT(oi != NULL); |
| 1516 | |
| 1517 | /* Reset all bindings. */ |
| 1518 | for (i = 0, od = oi->oi_dev; i < oi->oi_dev_count; i++, od++) |
| 1519 | od->od_device = NULL; |
| 1520 | |
| 1521 | /* |
| 1522 | * Iterate over all ACPI children that have been attached under this |
| 1523 | * acpivga device (as acpiout devices). |
| 1524 | */ |
| 1525 | SIMPLEQ_FOREACH(ad, &asc->sc_node->ad_child_head, ad_child_list) { |
| 1526 | if ((ad->ad_device == NULL) || |
| 1527 | (device_parent(ad->ad_device) != asc->sc_dev)) |
| 1528 | continue; |
| 1529 | |
| 1530 | KASSERT(device_is_a(ad->ad_device, "acpiout" )); |
| 1531 | |
| 1532 | osc = device_private(ad->ad_device); |
| 1533 | |
| 1534 | /* |
| 1535 | * For display output devices, the method _ADR returns |
| 1536 | * the device's ID (ACPI 4.0a, Sec. B.6.1). We do not |
| 1537 | * cache the result of _ADR since it may vary. |
| 1538 | */ |
| 1539 | hdl = osc->sc_node->ad_handle; |
| 1540 | rv = acpi_eval_integer(hdl, "_ADR" , &val); |
| 1541 | if (ACPI_FAILURE(rv)) { |
| 1542 | aprint_error_dev(asc->sc_dev, |
| 1543 | "failed to evaluate %s.%s: %s\n" , |
| 1544 | acpi_name(hdl), "_ADR" , AcpiFormatException(rv)); |
| 1545 | continue; |
| 1546 | } |
| 1547 | |
| 1548 | /* The device ID is a 16-bit integer (ACPI 4.0a, Table B-2). */ |
| 1549 | devid = (uint16_t)val; |
| 1550 | |
| 1551 | /* |
| 1552 | * The device ID must be unique (among output devices), and must |
| 1553 | * appear in the list returned by _DOD (ACPI 4.0a, Sec. B.6.1). |
| 1554 | */ |
| 1555 | for (i = 0, od = oi->oi_dev; i < oi->oi_dev_count; i++, od++) { |
| 1556 | if (devid == od->od_attrs.device_id) { |
| 1557 | if (od->od_device != NULL) |
| 1558 | aprint_error_dev(asc->sc_dev, |
| 1559 | "%s has same device ID as %s\n" , |
| 1560 | device_xname(osc->sc_dev), |
| 1561 | device_xname(od->od_device)); |
| 1562 | else |
| 1563 | od->od_device = osc->sc_dev; |
| 1564 | break; |
| 1565 | } |
| 1566 | } |
| 1567 | if (i == oi->oi_dev_count) |
| 1568 | aprint_error_dev(asc->sc_dev, |
| 1569 | "unknown output device %s\n" , |
| 1570 | device_xname(osc->sc_dev)); |
| 1571 | } |
| 1572 | } |
| 1573 | |
| 1574 | /* |
| 1575 | * Regarding _BCL (ACPI 4.0a, Sec. B.6.2): |
| 1576 | * |
| 1577 | * "This method allows the OS to query a list of brightness levels supported by |
| 1578 | * built-in display output devices." |
| 1579 | * |
| 1580 | * "Return value: a variable-length package containing a list of integers |
| 1581 | * representing the supported brightness levels. Each integer has 8 bits of |
| 1582 | * significant data." |
| 1583 | */ |
| 1584 | |
| 1585 | static struct acpidisp_brctl * |
| 1586 | acpidisp_init_brctl(const struct acpidisp_out_softc *osc) |
| 1587 | { |
| 1588 | ACPI_HANDLE hdl = osc->sc_node->ad_handle; |
| 1589 | ACPI_STATUS rv; |
| 1590 | ACPI_OBJECT *pkg; |
| 1591 | struct acpidisp_brctl *bc; |
| 1592 | uint8_t *levelp; |
| 1593 | uint32_t i; |
| 1594 | int32_t j; |
| 1595 | uint16_t count, k; |
| 1596 | uint8_t level; |
| 1597 | |
| 1598 | if (!(osc->sc_caps & ACPI_DISP_OUT_CAP__BCL)) |
| 1599 | return NULL; |
| 1600 | |
| 1601 | bc = NULL; |
| 1602 | pkg = NULL; |
| 1603 | |
| 1604 | rv = acpidisp_eval_package(hdl, "_BCL" , &pkg, 2); |
| 1605 | if (ACPI_FAILURE(rv)) |
| 1606 | goto fail; |
| 1607 | |
| 1608 | /* |
| 1609 | * Allocate and fill the struct acpidisp_brctl to be returned. |
| 1610 | */ |
| 1611 | bc = kmem_zalloc(sizeof(*bc), KM_SLEEP); |
| 1612 | if (bc == NULL) { |
| 1613 | rv = AE_NO_MEMORY; |
| 1614 | goto fail; |
| 1615 | } |
| 1616 | |
| 1617 | /* At most 256 brightness levels (8-bit integers). */ |
| 1618 | if (pkg->Package.Count > 256) |
| 1619 | bc->bc_level_count = 256; |
| 1620 | else |
| 1621 | bc->bc_level_count = (uint16_t)pkg->Package.Count; |
| 1622 | |
| 1623 | bc->bc_level = kmem_zalloc(bc->bc_level_count * sizeof(*bc->bc_level), |
| 1624 | KM_SLEEP); |
| 1625 | if (bc->bc_level == NULL) { |
| 1626 | rv = AE_NO_MEMORY; |
| 1627 | goto fail; |
| 1628 | } |
| 1629 | |
| 1630 | /* |
| 1631 | * Fill the array bc->bc_level with an insertion sort. |
| 1632 | */ |
| 1633 | for (count = 0, i = 0; i < pkg->Package.Count; i++) { |
| 1634 | /* List of 8-bit integers (ACPI 4.0a, Sec. B.6.2). */ |
| 1635 | if (pkg->Package.Elements[i].Type != ACPI_TYPE_INTEGER || |
| 1636 | pkg->Package.Elements[i].Integer.Value > UINT8_MAX) |
| 1637 | continue; |
| 1638 | |
| 1639 | level = (uint8_t)pkg->Package.Elements[i].Integer.Value; |
| 1640 | |
| 1641 | /* Find the correct slot but do not modify the array yet. */ |
| 1642 | for (j = count; --j >= 0 && bc->bc_level[j] > level; ); |
| 1643 | if (j >= 0 && bc->bc_level[j] == level) |
| 1644 | continue; |
| 1645 | j++; |
| 1646 | |
| 1647 | /* Make room for the new level. */ |
| 1648 | for (k = count; k > j; k--) |
| 1649 | bc->bc_level[k] = bc->bc_level[k-1]; |
| 1650 | |
| 1651 | /* Insert the new level. */ |
| 1652 | bc->bc_level[j] = level; |
| 1653 | count++; |
| 1654 | } |
| 1655 | |
| 1656 | if (count == 0) { |
| 1657 | rv = AE_BAD_DATA; |
| 1658 | goto fail; |
| 1659 | } |
| 1660 | |
| 1661 | ACPI_FREE(pkg); |
| 1662 | pkg = NULL; |
| 1663 | |
| 1664 | /* |
| 1665 | * Resize the array bc->bc_level if needed. |
| 1666 | */ |
| 1667 | if (count < bc->bc_level_count) { |
| 1668 | levelp = kmem_alloc(count * sizeof(*levelp), KM_SLEEP); |
| 1669 | if (levelp == NULL) { |
| 1670 | rv = AE_NO_MEMORY; |
| 1671 | goto fail; |
| 1672 | } |
| 1673 | |
| 1674 | (void)memcpy(levelp, bc->bc_level, count * sizeof(*levelp)); |
| 1675 | kmem_free(bc->bc_level, |
| 1676 | bc->bc_level_count * sizeof(*bc->bc_level)); |
| 1677 | |
| 1678 | bc->bc_level = levelp; |
| 1679 | bc->bc_level_count = count; |
| 1680 | } |
| 1681 | |
| 1682 | return bc; |
| 1683 | |
| 1684 | fail: |
| 1685 | aprint_error_dev(osc->sc_dev, "failed to evaluate %s.%s: %s\n" , |
| 1686 | acpi_name(hdl), "_BCL" , AcpiFormatException(rv)); |
| 1687 | if (pkg != NULL) |
| 1688 | ACPI_FREE(pkg); |
| 1689 | if (bc != NULL) { |
| 1690 | if (bc->bc_level != NULL) |
| 1691 | kmem_free(bc->bc_level, |
| 1692 | bc->bc_level_count * sizeof(*bc->bc_level)); |
| 1693 | kmem_free(bc, sizeof(*bc)); |
| 1694 | } |
| 1695 | return NULL; |
| 1696 | } |
| 1697 | |
| 1698 | /* |
| 1699 | * Evaluation of simple ACPI display methods. |
| 1700 | */ |
| 1701 | |
| 1702 | static int |
| 1703 | acpidisp_set_policy(const struct acpidisp_vga_softc *asc, uint8_t value) |
| 1704 | { |
| 1705 | ACPI_HANDLE hdl = asc->sc_node->ad_handle; |
| 1706 | ACPI_INTEGER val; |
| 1707 | ACPI_STATUS rv; |
| 1708 | |
| 1709 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s: set %s: 0x%" PRIx8"\n" , |
| 1710 | device_xname(asc->sc_dev), "policy" , value)); |
| 1711 | |
| 1712 | if (!(asc->sc_caps & ACPI_DISP_VGA_CAP__DOS)) |
| 1713 | return ENODEV; |
| 1714 | |
| 1715 | val = (ACPI_INTEGER)value; |
| 1716 | rv = acpi_eval_set_integer(hdl, "_DOS" , val); |
| 1717 | if (ACPI_FAILURE(rv)) { |
| 1718 | aprint_error_dev(asc->sc_dev, "failed to evaluate %s.%s: %s\n" , |
| 1719 | acpi_name(hdl), "_DOS" , AcpiFormatException(rv)); |
| 1720 | return EIO; |
| 1721 | } |
| 1722 | |
| 1723 | return 0; |
| 1724 | } |
| 1725 | |
| 1726 | static int |
| 1727 | acpidisp_get_status(const struct acpidisp_out_softc *osc, uint32_t *valuep) |
| 1728 | { |
| 1729 | ACPI_HANDLE hdl = osc->sc_node->ad_handle; |
| 1730 | ACPI_INTEGER val; |
| 1731 | ACPI_STATUS rv; |
| 1732 | |
| 1733 | if (!(osc->sc_caps & ACPI_DISP_OUT_CAP__DCS)) |
| 1734 | return ENODEV; |
| 1735 | |
| 1736 | rv = acpi_eval_integer(hdl, "_DCS" , &val); |
| 1737 | if (ACPI_FAILURE(rv)) { |
| 1738 | aprint_error_dev(osc->sc_dev, "failed to evaluate %s.%s: %s\n" , |
| 1739 | acpi_name(hdl), "_DCS" , AcpiFormatException(rv)); |
| 1740 | return EIO; |
| 1741 | } |
| 1742 | |
| 1743 | if (val > UINT32_MAX) |
| 1744 | return ERANGE; |
| 1745 | |
| 1746 | *valuep = (uint32_t)val; |
| 1747 | |
| 1748 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s: get %s: 0x%" PRIx32"\n" , |
| 1749 | device_xname(osc->sc_dev), "status" , *valuep)); |
| 1750 | |
| 1751 | return 0; |
| 1752 | } |
| 1753 | |
| 1754 | static int |
| 1755 | acpidisp_get_state(const struct acpidisp_out_softc *osc, uint32_t *valuep) |
| 1756 | { |
| 1757 | ACPI_HANDLE hdl = osc->sc_node->ad_handle; |
| 1758 | ACPI_INTEGER val; |
| 1759 | ACPI_STATUS rv; |
| 1760 | |
| 1761 | if (!(osc->sc_caps & ACPI_DISP_OUT_CAP__DGS)) |
| 1762 | return ENODEV; |
| 1763 | |
| 1764 | rv = acpi_eval_integer(hdl, "_DGS" , &val); |
| 1765 | if (ACPI_FAILURE(rv)) { |
| 1766 | aprint_error_dev(osc->sc_dev, "failed to evaluate %s.%s: %s\n" , |
| 1767 | acpi_name(hdl), "_DGS" , AcpiFormatException(rv)); |
| 1768 | return EIO; |
| 1769 | } |
| 1770 | |
| 1771 | if (val > UINT32_MAX) |
| 1772 | return ERANGE; |
| 1773 | |
| 1774 | *valuep = (uint32_t)val; |
| 1775 | |
| 1776 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s: get %s: 0x%" PRIx32"\n" , |
| 1777 | device_xname(osc->sc_dev), "state" , *valuep)); |
| 1778 | |
| 1779 | return 0; |
| 1780 | } |
| 1781 | |
| 1782 | static int |
| 1783 | acpidisp_set_state(const struct acpidisp_out_softc *osc, uint32_t value) |
| 1784 | { |
| 1785 | ACPI_HANDLE hdl = osc->sc_node->ad_handle; |
| 1786 | ACPI_INTEGER val; |
| 1787 | ACPI_STATUS rv; |
| 1788 | |
| 1789 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s: set %s: 0x%" PRIx32"\n" , |
| 1790 | device_xname(osc->sc_dev), "state" , value)); |
| 1791 | |
| 1792 | if (!(osc->sc_caps & ACPI_DISP_OUT_CAP__DSS)) |
| 1793 | return ENODEV; |
| 1794 | |
| 1795 | val = (ACPI_INTEGER)value; |
| 1796 | rv = acpi_eval_set_integer(hdl, "_DSS" , val); |
| 1797 | if (ACPI_FAILURE(rv)) { |
| 1798 | aprint_error_dev(osc->sc_dev, "failed to evaluate %s.%s: %s\n" , |
| 1799 | acpi_name(hdl), "_DSS" , AcpiFormatException(rv)); |
| 1800 | return EIO; |
| 1801 | } |
| 1802 | |
| 1803 | return 0; |
| 1804 | } |
| 1805 | |
| 1806 | static int |
| 1807 | acpidisp_get_brightness(const struct acpidisp_out_softc *osc, uint8_t *valuep) |
| 1808 | { |
| 1809 | ACPI_HANDLE hdl = osc->sc_node->ad_handle; |
| 1810 | ACPI_INTEGER val; |
| 1811 | ACPI_STATUS rv; |
| 1812 | |
| 1813 | if (!(osc->sc_caps & ACPI_DISP_OUT_CAP__BQC)) |
| 1814 | return ENODEV; |
| 1815 | |
| 1816 | rv = acpi_eval_integer(hdl, "_BQC" , &val); |
| 1817 | if (ACPI_FAILURE(rv)) { |
| 1818 | aprint_error_dev(osc->sc_dev, "failed to evaluate %s.%s: %s\n" , |
| 1819 | acpi_name(hdl), "_BQC" , AcpiFormatException(rv)); |
| 1820 | return EIO; |
| 1821 | } |
| 1822 | |
| 1823 | if (val > UINT8_MAX) |
| 1824 | return ERANGE; |
| 1825 | |
| 1826 | *valuep = (uint8_t)val; |
| 1827 | |
| 1828 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s: get %s: %" PRIu8"\n" , |
| 1829 | device_xname(osc->sc_dev), "brightness" , *valuep)); |
| 1830 | |
| 1831 | return 0; |
| 1832 | } |
| 1833 | |
| 1834 | static int |
| 1835 | acpidisp_set_brightness(const struct acpidisp_out_softc *osc, uint8_t value) |
| 1836 | { |
| 1837 | ACPI_HANDLE hdl = osc->sc_node->ad_handle; |
| 1838 | ACPI_INTEGER val; |
| 1839 | ACPI_STATUS rv; |
| 1840 | |
| 1841 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s: set %s: %" PRIu8"\n" , |
| 1842 | device_xname(osc->sc_dev), "brightness" , value)); |
| 1843 | |
| 1844 | if (!(osc->sc_caps & ACPI_DISP_OUT_CAP__BCM)) |
| 1845 | return ENODEV; |
| 1846 | |
| 1847 | val = (ACPI_INTEGER)value; |
| 1848 | rv = acpi_eval_set_integer(hdl, "_BCM" , val); |
| 1849 | if (ACPI_FAILURE(rv)) { |
| 1850 | aprint_error_dev(osc->sc_dev, "failed to evaluate %s.%s: %s\n" , |
| 1851 | acpi_name(hdl), "_BCM" , AcpiFormatException(rv)); |
| 1852 | return EIO; |
| 1853 | } |
| 1854 | |
| 1855 | return 0; |
| 1856 | } |
| 1857 | |
| 1858 | /* |
| 1859 | * Pretty printing. |
| 1860 | */ |
| 1861 | |
| 1862 | static void |
| 1863 | acpidisp_print_odinfo(device_t self, const struct acpidisp_odinfo *oi) |
| 1864 | { |
| 1865 | struct acpidisp_outdev *od; |
| 1866 | uint32_t i; |
| 1867 | |
| 1868 | KASSERT(oi != NULL); |
| 1869 | |
| 1870 | aprint_verbose_dev(self, "connected output devices:\n" ); |
| 1871 | for (i = 0, od = oi->oi_dev; i < oi->oi_dev_count; i++, od++) { |
| 1872 | aprint_verbose_dev(self, " 0x%04" PRIx16, od->od_attrs.device_id); |
| 1873 | if (od->od_device != NULL) |
| 1874 | aprint_verbose(" (%s)" , device_xname(od->od_device)); |
| 1875 | aprint_verbose(": " ); |
| 1876 | acpidisp_print_od_attrs(od->od_attrs); |
| 1877 | aprint_verbose("\n" ); |
| 1878 | } |
| 1879 | } |
| 1880 | |
| 1881 | /* |
| 1882 | * general purpose range printing function |
| 1883 | * 1 -> 1 |
| 1884 | * 1 2 4 6 7-> [1-2,4,6-7] |
| 1885 | */ |
| 1886 | static void |
| 1887 | ranger(uint8_t *a, size_t l, void (*pr)(const char *, ...) __printflike(1, 2)) |
| 1888 | { |
| 1889 | uint8_t b, e; |
| 1890 | |
| 1891 | if (l > 1) |
| 1892 | (*pr)("[" ); |
| 1893 | |
| 1894 | for (size_t i = 0; i < l; i++) { |
| 1895 | for (b = e = a[i]; i + 1 < l && a[i + 1] == e + 1; i++, e++) |
| 1896 | continue; |
| 1897 | (*pr)("%" PRIu8, b); |
| 1898 | if (b != e) |
| 1899 | (*pr)("-%" PRIu8, e); |
| 1900 | if (i < l - 1) |
| 1901 | (*pr)("," ); |
| 1902 | } |
| 1903 | |
| 1904 | if (l > 1) |
| 1905 | (*pr)("]" ); |
| 1906 | } |
| 1907 | |
| 1908 | static void |
| 1909 | acpidisp_print_brctl(device_t self, const struct acpidisp_brctl *bc) |
| 1910 | { |
| 1911 | KASSERT(bc != NULL); |
| 1912 | |
| 1913 | aprint_verbose_dev(self, "brightness levels: " ); |
| 1914 | ranger(bc->bc_level, bc->bc_level_count, aprint_verbose); |
| 1915 | aprint_verbose("\n" ); |
| 1916 | } |
| 1917 | |
| 1918 | static void |
| 1919 | acpidisp_print_od_attrs(acpidisp_od_attrs_t oda) |
| 1920 | { |
| 1921 | const char *type; |
| 1922 | |
| 1923 | if (oda.fmt.device_id_scheme == 1) { |
| 1924 | /* Uses the device ID scheme introduced in ACPI 3.0. */ |
| 1925 | switch (oda.fmt.type) { |
| 1926 | case ACPI_DISP_OUT_ATTR_TYPE_OTHER: |
| 1927 | type = "Other" ; |
| 1928 | break; |
| 1929 | case ACPI_DISP_OUT_ATTR_TYPE_VGA: |
| 1930 | type = "VGA Analog Monitor" ; |
| 1931 | break; |
| 1932 | case ACPI_DISP_OUT_ATTR_TYPE_TV: |
| 1933 | type = "TV/HDTV Monitor" ; |
| 1934 | break; |
| 1935 | case ACPI_DISP_OUT_ATTR_TYPE_EXTDIG: |
| 1936 | type = "Ext. Digital Monitor" ; |
| 1937 | break; |
| 1938 | case ACPI_DISP_OUT_ATTR_TYPE_INTDFP: |
| 1939 | type = "Int. Digital Flat Panel" ; |
| 1940 | break; |
| 1941 | default: |
| 1942 | type = "Invalid" ; |
| 1943 | break; |
| 1944 | } |
| 1945 | |
| 1946 | aprint_verbose("%s, index %d, port %d" , |
| 1947 | type, oda.fmt.index, oda.fmt.port); |
| 1948 | } else { |
| 1949 | /* Uses vendor-specific device IDs. */ |
| 1950 | switch (oda.device_id) { |
| 1951 | case ACPI_DISP_OUT_LEGACY_DEVID_MONITOR: |
| 1952 | type = "Ext. Monitor" ; |
| 1953 | break; |
| 1954 | case ACPI_DISP_OUT_LEGACY_DEVID_PANEL: |
| 1955 | type = "LCD Panel" ; |
| 1956 | break; |
| 1957 | case ACPI_DISP_OUT_LEGACY_DEVID_TV: |
| 1958 | type = "TV" ; |
| 1959 | break; |
| 1960 | default: |
| 1961 | type = "Unknown Output Device" ; |
| 1962 | break; |
| 1963 | } |
| 1964 | |
| 1965 | aprint_verbose("%s" , type); |
| 1966 | } |
| 1967 | |
| 1968 | aprint_verbose(", head %d" , oda.fmt.head_id); |
| 1969 | if (oda.fmt.bios_detect) |
| 1970 | aprint_verbose(", bios detect" ); |
| 1971 | if (oda.fmt.non_vga) |
| 1972 | aprint_verbose(", non vga" ); |
| 1973 | } |
| 1974 | |
| 1975 | /* |
| 1976 | * General-purpose utility functions. |
| 1977 | */ |
| 1978 | |
| 1979 | /* |
| 1980 | * acpidisp_has_method: |
| 1981 | * |
| 1982 | * Returns true if and only if (a) the object handle.path exists and |
| 1983 | * (b) this object is a method or has the given type. |
| 1984 | */ |
| 1985 | static bool |
| 1986 | acpidisp_has_method(ACPI_HANDLE handle, const char *path, ACPI_OBJECT_TYPE type) |
| 1987 | { |
| 1988 | ACPI_HANDLE hdl; |
| 1989 | ACPI_OBJECT_TYPE typ; |
| 1990 | |
| 1991 | KASSERT(handle != NULL); |
| 1992 | |
| 1993 | if (ACPI_FAILURE(AcpiGetHandle(handle, path, &hdl))) |
| 1994 | return false; |
| 1995 | |
| 1996 | if (ACPI_FAILURE(AcpiGetType(hdl, &typ))) |
| 1997 | return false; |
| 1998 | |
| 1999 | if (typ != ACPI_TYPE_METHOD && typ != type) |
| 2000 | return false; |
| 2001 | |
| 2002 | return true; |
| 2003 | } |
| 2004 | |
| 2005 | /* |
| 2006 | * acpidisp_eval_package: |
| 2007 | * |
| 2008 | * Evaluate a package (with an expected minimum number of elements). |
| 2009 | * Caller must free *pkg by ACPI_FREE(). |
| 2010 | */ |
| 2011 | static ACPI_STATUS |
| 2012 | acpidisp_eval_package(ACPI_HANDLE handle, const char *path, ACPI_OBJECT **pkg, |
| 2013 | unsigned int mincount) |
| 2014 | { |
| 2015 | ACPI_BUFFER buf; |
| 2016 | ACPI_OBJECT *obj; |
| 2017 | ACPI_STATUS rv; |
| 2018 | |
| 2019 | rv = acpi_eval_struct(handle, path, &buf); |
| 2020 | if (ACPI_FAILURE(rv)) |
| 2021 | return rv; |
| 2022 | |
| 2023 | if (buf.Length == 0 || buf.Pointer == NULL) |
| 2024 | return AE_NULL_OBJECT; |
| 2025 | |
| 2026 | obj = buf.Pointer; |
| 2027 | |
| 2028 | if (obj->Type != ACPI_TYPE_PACKAGE) { |
| 2029 | ACPI_FREE(obj); |
| 2030 | return AE_TYPE; |
| 2031 | } |
| 2032 | |
| 2033 | if (obj->Package.Count < mincount) { |
| 2034 | ACPI_FREE(obj); |
| 2035 | return AE_BAD_DATA; |
| 2036 | } |
| 2037 | |
| 2038 | *pkg = obj; |
| 2039 | return rv; |
| 2040 | } |
| 2041 | |
| 2042 | /* |
| 2043 | * acpidisp_array_search: |
| 2044 | * |
| 2045 | * Look for a value v in a sorted array a of n integers (n > 0). Fill *l |
| 2046 | * and *u as follows: |
| 2047 | * |
| 2048 | * *l = Max {a[i] | a[i] <= v or i = 0} |
| 2049 | * *u = Min {a[i] | a[i] >= v or i = n-1} |
| 2050 | */ |
| 2051 | static void |
| 2052 | acpidisp_array_search(const uint8_t *a, uint16_t n, int v, uint8_t *l, uint8_t *u) |
| 2053 | { |
| 2054 | uint16_t i, j, m; |
| 2055 | |
| 2056 | if (v <= a[0]) { |
| 2057 | *l = a[0]; |
| 2058 | *u = a[0]; |
| 2059 | return; |
| 2060 | } |
| 2061 | if (v >= a[n-1]) { |
| 2062 | *l = a[n-1]; |
| 2063 | *u = a[n-1]; |
| 2064 | return; |
| 2065 | } |
| 2066 | |
| 2067 | for (i = 0, j = n - 1; j - i > 1; ) { |
| 2068 | m = (i + j) / 2; |
| 2069 | |
| 2070 | if (a[m] == v) { |
| 2071 | *l = v; |
| 2072 | *u = v; |
| 2073 | return; |
| 2074 | } |
| 2075 | |
| 2076 | if (a[m] < v) |
| 2077 | i = m; |
| 2078 | else |
| 2079 | j = m; |
| 2080 | } |
| 2081 | |
| 2082 | /* Here a[i] < v < a[j] and j = i + 1. */ |
| 2083 | *l = a[i]; |
| 2084 | *u = a[j]; |
| 2085 | return; |
| 2086 | } |
| 2087 | |
| 2088 | MODULE(MODULE_CLASS_DRIVER, acpivga, NULL); |
| 2089 | |
| 2090 | #ifdef _MODULE |
| 2091 | #include "ioconf.c" |
| 2092 | #endif |
| 2093 | |
| 2094 | static int |
| 2095 | acpivga_modcmd(modcmd_t cmd, void *aux) |
| 2096 | { |
| 2097 | int rv = 0; |
| 2098 | |
| 2099 | switch (cmd) { |
| 2100 | |
| 2101 | case MODULE_CMD_INIT: |
| 2102 | |
| 2103 | #ifdef _MODULE |
| 2104 | rv = config_init_component(cfdriver_ioconf_acpivga, |
| 2105 | cfattach_ioconf_acpivga, cfdata_ioconf_acpivga); |
| 2106 | #endif |
| 2107 | break; |
| 2108 | |
| 2109 | case MODULE_CMD_FINI: |
| 2110 | |
| 2111 | #ifdef _MODULE |
| 2112 | rv = config_fini_component(cfdriver_ioconf_acpivga, |
| 2113 | cfattach_ioconf_acpivga, cfdata_ioconf_acpivga); |
| 2114 | #endif |
| 2115 | break; |
| 2116 | |
| 2117 | default: |
| 2118 | rv = ENOTTY; |
| 2119 | } |
| 2120 | |
| 2121 | return rv; |
| 2122 | } |
| 2123 | |