| /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| |
| #include <acpi/acpigen.h> |
| #include <string.h> |
| #include "i915.h" |
| |
| void |
| drivers_intel_gma_displays_ssdt_generate(const struct i915_gpu_controller_info *conf) |
| { |
| size_t i; |
| const char *names[] = { "UNK", "VGA", "TV", "DVI", "LCD" }; |
| int counters[ARRAY_SIZE(names)] = { 0 }; |
| |
| if (!conf->ndid) |
| return; |
| |
| acpigen_write_scope("\\_SB.PCI0.GFX0"); |
| |
| /* |
| Method (_DOD, 0) |
| { |
| Return (Package() { |
| 0x5a5a5a5a, |
| 0x5a5a5a5a, |
| 0x5a5a5a5a |
| }) |
| } |
| */ |
| acpigen_write_method("_DOD", 0); |
| |
| acpigen_emit_byte(RETURN_OP); |
| acpigen_write_package(conf->ndid); |
| for (i = 0; i < conf->ndid; i++) { |
| acpigen_write_dword(conf->did[i] | 0x80010000); |
| } |
| acpigen_pop_len(); /* End Package. */ |
| |
| acpigen_pop_len(); /* End Method. */ |
| |
| for (i = 0; i < conf->ndid; i++) { |
| char name[5]; |
| int kind; |
| |
| kind = (conf->did[i] >> 8) & 0xf; |
| if (kind >= ARRAY_SIZE(names)) { |
| kind = 0; |
| } |
| |
| snprintf(name, sizeof(name), "%s%d", names[kind], counters[kind]); |
| counters[kind]++; |
| |
| /* Device (LCD0) */ |
| acpigen_write_device(name); |
| |
| /* Name (_ADR, 0x0410) */ |
| acpigen_write_name_dword("_ADR", conf->did[i] & 0xffff); |
| |
| /* ACPI brightness for LCD. */ |
| if (kind == 4) { |
| /* |
| Method (_BCL, 0, NotSerialized) |
| { |
| Return (^^XBCL()) |
| } |
| */ |
| acpigen_write_method("_BCL", 0); |
| acpigen_emit_byte(RETURN_OP); |
| acpigen_emit_namestring("^^XBCL"); |
| acpigen_pop_len(); |
| |
| /* |
| Method (_BCM, 1, NotSerialized) |
| { |
| ^^XBCM(Arg0) |
| } |
| */ |
| acpigen_write_method("_BCM", 1); |
| acpigen_emit_namestring("^^XBCM"); |
| acpigen_emit_byte(ARG0_OP); |
| acpigen_pop_len(); |
| |
| /* |
| Method (_BQC, 0, NotSerialized) |
| { |
| Return (^^XBQC()) |
| } |
| */ |
| acpigen_write_method("_BQC", 0); |
| acpigen_emit_byte(RETURN_OP); |
| acpigen_emit_namestring("^^XBQC"); |
| acpigen_pop_len(); |
| } |
| |
| /* |
| * _DCS, _DGS and _DSS are required by specification. However, |
| * we never implemented them properly, and no OS driver com- |
| * plained yet. So we stub them out and keep the traditional |
| * behavior in case an OS driver checks for their existence. |
| */ |
| |
| /* |
| Method(_DCS, 0) |
| { |
| Return (0x1d) |
| } |
| */ |
| acpigen_write_method("_DCS", 0); |
| acpigen_write_return_integer(0x1d); |
| acpigen_pop_len(); |
| |
| /* |
| Method(_DGS, 0) |
| { |
| Return (0) |
| } |
| */ |
| acpigen_write_method("_DGS", 0); |
| acpigen_write_return_integer(0); |
| acpigen_pop_len(); |
| |
| /* |
| Method(_DSS, 1) |
| { |
| } |
| */ |
| acpigen_write_method("_DSS", 1); |
| acpigen_pop_len(); |
| |
| acpigen_pop_len(); /* End Device. */ |
| } |
| |
| acpigen_pop_len(); /* End Scope. */ |
| } |