| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <acpi/acpigen.h> |
| #include <console/console.h> |
| #include <device/device.h> |
| #include <device/pci.h> |
| #include <device/pci_ids.h> |
| |
| #include "chip.h" |
| |
| #define ACPI_DSM_PRIVACY_SCREEN_UUID "C7033113-8720-4CEB-9090-9D52B3E52D73" |
| |
| #define ACPI_METHOD_EPS_PRESENT "EPSP" |
| #define ACPI_METHOD_EPS_STATE "EPSS" |
| #define ACPI_METHOD_EPS_ENABLE "EPSE" |
| #define ACPI_METHOD_EPS_DISABLE "EPSD" |
| |
| static void privacy_screen_detect_cb(void *arg) |
| { |
| struct drivers_gfx_generic_privacy_screen_config *config = arg; |
| |
| acpigen_write_store(); |
| acpigen_emit_namestring(config->detect_function); |
| acpigen_emit_byte(LOCAL2_OP); |
| acpigen_write_if_lequal_op_int(LOCAL2_OP, 1); |
| acpigen_write_return_singleton_buffer(0xF); |
| acpigen_pop_len(); |
| } |
| static void privacy_screen_get_status_cb(void *arg) |
| { |
| struct drivers_gfx_generic_privacy_screen_config *config = arg; |
| |
| acpigen_emit_byte(RETURN_OP); |
| acpigen_emit_namestring(config->status_function); |
| } |
| static void privacy_screen_enable_cb(void *arg) |
| { |
| struct drivers_gfx_generic_privacy_screen_config *config = arg; |
| |
| acpigen_emit_namestring(config->enable_function); |
| } |
| static void privacy_screen_disable_cb(void *arg) |
| { |
| struct drivers_gfx_generic_privacy_screen_config *config = arg; |
| |
| acpigen_emit_namestring(config->disable_function); |
| } |
| |
| static void (*privacy_screen_callbacks[])(void *) = { |
| privacy_screen_detect_cb, |
| privacy_screen_get_status_cb, |
| privacy_screen_enable_cb, |
| privacy_screen_disable_cb, |
| }; |
| |
| static void privacy_gpio_acpigen(struct acpi_gpio *gpio) |
| { |
| /* EPS Present */ |
| acpigen_write_method(ACPI_METHOD_EPS_PRESENT, 0); |
| acpigen_write_return_byte(1); |
| acpigen_pop_len(); |
| |
| /* EPS State */ |
| acpigen_write_method(ACPI_METHOD_EPS_STATE, 0); |
| acpigen_get_rx_gpio(gpio); |
| acpigen_emit_byte(RETURN_OP); |
| acpigen_emit_byte(LOCAL0_OP); |
| acpigen_pop_len(); |
| |
| /* EPS Enable */ |
| acpigen_write_method(ACPI_METHOD_EPS_ENABLE, 0); |
| acpigen_enable_tx_gpio(gpio); |
| acpigen_pop_len(); |
| |
| /* EPS Disable */ |
| acpigen_write_method(ACPI_METHOD_EPS_DISABLE, 0); |
| acpigen_disable_tx_gpio(gpio); |
| acpigen_pop_len(); |
| } |
| |
| static void gfx_fill_privacy_screen_dsm( |
| struct drivers_gfx_generic_privacy_screen_config *privacy) |
| { |
| if (!privacy->enabled) |
| return; |
| |
| /* Populate ACPI methods, if EPS controlled via gpio */ |
| if (privacy->gpio.pin_count == 1) { |
| privacy_gpio_acpigen(&privacy->gpio); |
| privacy->detect_function = ACPI_METHOD_EPS_PRESENT; |
| privacy->status_function = ACPI_METHOD_EPS_STATE; |
| privacy->enable_function = ACPI_METHOD_EPS_ENABLE; |
| privacy->disable_function = ACPI_METHOD_EPS_DISABLE; |
| } |
| |
| acpigen_write_dsm(ACPI_DSM_PRIVACY_SCREEN_UUID, |
| privacy_screen_callbacks, |
| ARRAY_SIZE(privacy_screen_callbacks), |
| privacy); |
| } |
| |
| static void gfx_fill_ssdt_generator(const struct device *dev) |
| { |
| size_t i; |
| struct drivers_gfx_generic_config *config = dev->chip_info; |
| |
| const char *scope = acpi_device_scope(dev); |
| |
| if (!scope) |
| return; |
| |
| acpigen_write_scope(scope); |
| |
| /* Method (_DOD, 0) */ |
| acpigen_write_method("_DOD", 0); |
| acpigen_emit_byte(RETURN_OP); |
| acpigen_write_package(config->device_count); |
| for (i = 0; i < config->device_count; i++) |
| acpigen_write_dword(config->device[i].addr); |
| acpigen_pop_len(); /* End Package. */ |
| acpigen_pop_len(); /* End Method. */ |
| |
| for (i = 0; i < config->device_count; i++) { |
| acpigen_write_device(config->device[i].name); |
| acpigen_write_name_integer("_ADR", config->device[i].addr); |
| acpigen_write_name_integer("_STA", 0xF); |
| gfx_fill_privacy_screen_dsm(&config->device[i].privacy); |
| acpigen_pop_len(); /* Device */ |
| } |
| acpigen_pop_len(); /* Scope */ |
| } |
| |
| static const char *gfx_acpi_name(const struct device *dev) |
| { |
| struct drivers_gfx_generic_config *config = dev->chip_info; |
| |
| return config->name ? : "GFX0"; |
| } |
| |
| static struct device_operations gfx_ops = { |
| .acpi_name = gfx_acpi_name, |
| .acpi_fill_ssdt = gfx_fill_ssdt_generator, |
| }; |
| |
| static void gfx_enable(struct device *dev) |
| { |
| struct drivers_gfx_generic_config *config = dev->chip_info; |
| |
| if (!config || !dev->enabled) |
| return; |
| |
| dev->ops = &gfx_ops; |
| } |
| |
| struct chip_operations drivers_gfx_generic_ops = { |
| CHIP_NAME("Generic Graphics Device") |
| .enable_dev = gfx_enable |
| }; |
| |
| struct device *find_gfx_dev(void) |
| { |
| struct device *dev; |
| |
| for (dev = all_devices; dev; dev = dev->next) { |
| if (dev->chip_ops && dev->chip_ops == &drivers_gfx_generic_ops) |
| return dev; |
| } |
| return NULL; |
| } |