c135b829e7
Adds a generic graphics driver that can be added to a devicetree which
populates graphics-related ACPI table. It will write the _DOD method
(Enumerate All Devices Attached to the Display Adapter) and a device
object for each device defined. The device may optionally have a
connected privacy screen which can be controlled with a _DSM.
Example:
chip drivers/generic/gfx
register "device_count" = "1"
register "device[0].name" = ""LCD""
register "device[0].addr" = "0x0400"
register "device[0].privacy.enabled" = "1"
register "device[0].privacy.detect_function" = ""\\_SB.PCI0.PVSC.GPVD""
register "device[0].privacy.status_function" = ""\\_SB.PCI0.PVSC.GPVX""
register "device[0].privacy.enable_function" = ""\\_SB.PCI0.PVSC.EPVX""
register "device[0].privacy.disable_function" = ""\\_SB.PCI0.PVSC.DPVX""
device generic 0 on end
end
ASL
Scope (\_SB.PCI0.GFX0)
{
Method (_DOD, 0, NotSerialized) // _DOD: Display Output Devices
{
Return (Package (0x01)
{
0x00000400
})
}
Device (LCD)
{
Name (_ADR, 0x0400) // _ADR: Address
Name (_STA, 0x0F) // _STA: Status
Method (_DSM, 4, Serialized) // _DSM: Device-Specific Method
{
ToBuffer (Arg0, Local0)
If ((Local0 == ToUUID ("c7033113-8720-4ceb-9090-9d52b3e52d73")))
{
ToInteger (Arg2, Local1)
If ((Local1 == Zero))
{
Local2 = \_SB.PCI0.PVSC.GPVD ()
If ((Local2 == One))
{
Return (Buffer (One)
{
0x0F
})
}
}
If ((Local1 == One))
{
ToBuffer (\_SB.PCI0.PVSC.GPVX (), Local2)
Return (Local2)
}
If ((Local1 == 0x02))
{
\_SB.PCI0.PVSC.EPVX ()
}
If ((Local1 == 0x03))
{
\_SB.PCI0.PVSC.DPVX ()
}
Return (Buffer (One)
{
0x00
})
}
Return (Buffer (One)
{
0x00
})
}
}
}
BUG=b:142237145
TEST=Added gfx to devicetree on sarien_cml and correct ASL in SSDT
Change-Id: Ida520dd7aad81ee7c1e5f2d0d3f5cc1a766d78a0
Signed-off-by: Mathew King <mathewk@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36041
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
128 lines
3.3 KiB
C
128 lines
3.3 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright 2019 Google LLC
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <arch/acpigen.h>
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#include <console/console.h>
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#include <device/device.h>
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#include <device/pci.h>
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#include <device/pci_ids.h>
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#include <stdint.h>
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#include <string.h>
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#include "chip.h"
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#define ACPI_DSM_PRIVACY_SCREEN_UUID "C7033113-8720-4CEB-9090-9D52B3E52D73"
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static void privacy_screen_detect_cb(void *arg)
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{
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struct drivers_generic_gfx_privacy_screen_config *config = arg;
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acpigen_write_store();
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acpigen_emit_namestring(config->detect_function);
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acpigen_emit_byte(LOCAL2_OP);
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acpigen_write_if_lequal_op_int(LOCAL2_OP, 1);
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acpigen_write_return_singleton_buffer(0xF);
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acpigen_pop_len();
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}
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static void privacy_screen_get_status_cb(void *arg)
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{
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struct drivers_generic_gfx_privacy_screen_config *config = arg;
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acpigen_emit_byte(RETURN_OP);
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acpigen_emit_namestring(config->status_function);
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}
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static void privacy_screen_enable_cb(void *arg)
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{
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struct drivers_generic_gfx_privacy_screen_config *config = arg;
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acpigen_emit_namestring(config->enable_function);
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}
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static void privacy_screen_disable_cb(void *arg)
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{
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struct drivers_generic_gfx_privacy_screen_config *config = arg;
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acpigen_emit_namestring(config->disable_function);
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}
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static void (*privacy_screen_callbacks[])(void *) = {
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privacy_screen_detect_cb,
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privacy_screen_get_status_cb,
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privacy_screen_enable_cb,
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privacy_screen_disable_cb,
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};
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static void gfx_fill_ssdt_generator(struct device *dev)
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{
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size_t i;
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struct drivers_generic_gfx_config *config = dev->chip_info;
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const char *scope = acpi_device_scope(dev);
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acpigen_write_scope(scope);
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/* Method (_DOD, 0) */
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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(config->device_count);
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for (i = 0; i < config->device_count; i++)
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acpigen_write_dword(config->device[i].addr);
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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 < config->device_count; i++) {
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acpigen_write_device(config->device[i].name);
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acpigen_write_name_integer("_ADR", config->device[i].addr);
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acpigen_write_name_integer("_STA", 0xF);
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if (config->device[i].privacy.enabled) {
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acpigen_write_dsm(ACPI_DSM_PRIVACY_SCREEN_UUID,
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privacy_screen_callbacks,
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ARRAY_SIZE(privacy_screen_callbacks),
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&config->device[i].privacy);
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}
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acpigen_pop_len(); /* Device */
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}
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acpigen_pop_len(); /* Scope */
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}
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static const char *gfx_acpi_name(const struct device *dev)
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{
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struct drivers_generic_gfx_config *config = dev->chip_info;
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return config->name ? : "GFX0";
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}
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static struct device_operations gfx_ops = {
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.acpi_name = gfx_acpi_name,
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.acpi_fill_ssdt_generator = gfx_fill_ssdt_generator,
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};
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static void gfx_enable(struct device *dev)
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{
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struct drivers_generic_gfx_config *config = dev->chip_info;
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if (!config)
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return;
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dev->ops = &gfx_ops;
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}
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struct chip_operations drivers_generic_gfx_ops = {
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CHIP_NAME("Graphics Device")
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.enable_dev = gfx_enable
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};
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