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/* SPDX-License-Identifier: GPL-2.0-or-later */
/* This file is part of the coreboot project. */
#include <arch/acpi.h>
#include <arch/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. */
}
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