08375b5082
Change-Id: I9ed1a82fcd3fc29124ddc406592bd45dc84d4628 Signed-off-by: Elyes Haouas <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/c/coreboot/+/82666 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Yu-Ping Wu <yupingso@google.com> Reviewed-by: Yidi Lin <yidilin@google.com>
135 lines
2.5 KiB
C
135 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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#include <acpi/acpigen.h>
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#include <stdio.h>
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#include "i915.h"
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void
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drivers_intel_gma_displays_ssdt_generate(const struct i915_gpu_controller_info *conf)
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{
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size_t i;
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const char *names[] = { "UNK", "VGA", "TV", "DVI", "LCD" };
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int counters[ARRAY_SIZE(names)] = { 0 };
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if (!conf->ndid)
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return;
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acpigen_write_scope("\\_SB.PCI0.GFX0");
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/*
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Method (_DOD, 0)
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{
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Return (Package() {
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0x5a5a5a5a,
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0x5a5a5a5a,
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0x5a5a5a5a
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})
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}
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*/
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acpigen_write_method("_DOD", 0);
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acpigen_emit_byte(RETURN_OP);
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acpigen_write_package(conf->ndid);
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for (i = 0; i < conf->ndid; i++) {
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acpigen_write_dword(conf->did[i] | 0x80010000);
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}
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acpigen_pop_len(); /* End Package. */
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acpigen_pop_len(); /* End Method. */
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for (i = 0; i < conf->ndid; i++) {
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char name[5];
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int kind;
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kind = (conf->did[i] >> 8) & 0xf;
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if (kind >= ARRAY_SIZE(names)) {
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kind = 0;
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}
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snprintf(name, sizeof(name), "%s%d", names[kind], counters[kind]);
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counters[kind]++;
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/* Device (LCD0) */
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acpigen_write_device(name);
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/* Name (_ADR, 0x0410) */
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acpigen_write_name_dword("_ADR", conf->did[i] & 0xffff);
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/* ACPI brightness for LCD. */
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if (kind == 4) {
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/*
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Method (_BCL, 0, NotSerialized)
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{
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Return (^^XBCL())
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}
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*/
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acpigen_write_method("_BCL", 0);
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acpigen_emit_byte(RETURN_OP);
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acpigen_emit_namestring("^^XBCL");
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acpigen_pop_len();
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/*
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Method (_BCM, 1, NotSerialized)
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{
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^^XBCM(Arg0)
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}
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*/
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acpigen_write_method("_BCM", 1);
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acpigen_emit_namestring("^^XBCM");
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acpigen_emit_byte(ARG0_OP);
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acpigen_pop_len();
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/*
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Method (_BQC, 0, NotSerialized)
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{
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Return (^^XBQC())
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}
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*/
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acpigen_write_method("_BQC", 0);
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acpigen_emit_byte(RETURN_OP);
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acpigen_emit_namestring("^^XBQC");
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acpigen_pop_len();
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}
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/*
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* _DCS, _DGS and _DSS are required by specification. However,
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* we never implemented them properly, and no OS driver com-
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* plained yet. So we stub them out and keep the traditional
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* behavior in case an OS driver checks for their existence.
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*/
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/*
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Method(_DCS, 0)
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{
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Return (0x1d)
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}
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*/
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acpigen_write_method("_DCS", 0);
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acpigen_write_return_integer(0x1d);
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acpigen_pop_len();
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/*
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Method(_DGS, 0)
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{
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Return (0)
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}
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*/
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acpigen_write_method("_DGS", 0);
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acpigen_write_return_integer(0);
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acpigen_pop_len();
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/*
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Method(_DSS, 1)
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{
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}
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*/
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acpigen_write_method("_DSS", 1);
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acpigen_pop_len();
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acpigen_pop_len(); /* End Device. */
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}
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acpigen_pop_len(); /* End Scope. */
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}
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