diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/soc/amd/picasso/acp.c | 58 | ||||
| -rw-r--r-- | src/soc/amd/picasso/chip.h | 3 |
2 files changed, 60 insertions, 1 deletions
diff --git a/src/soc/amd/picasso/acp.c b/src/soc/amd/picasso/acp.c index 1e871e99d8..3272acf8f6 100644 --- a/src/soc/amd/picasso/acp.c +++ b/src/soc/amd/picasso/acp.c @@ -1,5 +1,7 @@ /* SPDX-License-Identifier: GPL-2.0-only */ +#include <acpi/acpi_device.h> +#include <acpi/acpigen.h> #include <console/console.h> #include <device/device.h> #include <device/pci.h> @@ -40,6 +42,60 @@ static const char *acp_acpi_name(const struct device *dev) return "ACPD"; } +#define AMD_I2S_ACPI_NAME "I2SM" +#define AMD_I2S_ACPI_HID "AMDI5682" +#define AMD_I2S_ACPI_DESC "I2S machine driver" + +static void acp_fill_i2s_machine_dev(const struct device *dev) +{ + const char *scope = acpi_device_path(dev); + const struct soc_amd_picasso_config *cfg = config_of_soc(); + const struct acpi_gpio *dmic_select_gpio = &cfg->dmic_select_gpio; + struct acpi_dp *dsd; + + if (dmic_select_gpio->pin_count == 0) + return; + + acpigen_write_scope(scope); /* Scope */ + acpigen_write_device(AMD_I2S_ACPI_NAME); /* Device */ + acpigen_write_name_string("_HID", AMD_I2S_ACPI_HID); + acpigen_write_name_integer("_UID", 1); + acpigen_write_name_string("_DDN", AMD_I2S_ACPI_DESC); + + acpigen_write_STA(ACPI_STATUS_DEVICE_ALL_ON); + + /* Resources */ + acpigen_write_name("_CRS"); + acpigen_write_resourcetemplate_header(); + acpi_device_write_gpio(dmic_select_gpio); + acpigen_write_resourcetemplate_footer(); + + dsd = acpi_dp_new_table("_DSD"); + /* + * This GPIO is used to select DMIC0 or DMIC1 by the kernel driver. It does not + * really have a polarity since low and high control the selection of DMIC and + * hence does not have an active polarity. + * Kernel driver does not use the polarity field and instead treats the GPIO + * selection as follows: + * Set low (0) = Select DMIC0 + * Set high (1) = Select DMIC1 + */ + acpi_dp_add_gpio(dsd, "dmic-gpios", acpi_device_path_join(dev, AMD_I2S_ACPI_NAME), + 0, /* Index = 0 (There is a single GPIO entry in _CRS). */ + 0, /* Pin = 0 (There is a single pin in the GPIO resource). */ + 0); /* Active low = 0 (Kernel driver does not use active polarity). */ + acpi_dp_write(dsd); + + acpigen_pop_len(); /* Device */ + acpigen_pop_len(); /* Scope */ +} + +static void acp_fill_ssdt(const struct device *dev) +{ + acpi_device_write_pci_dev(dev); + acp_fill_i2s_machine_dev(dev); +} + static struct device_operations acp_ops = { .read_resources = pci_dev_read_resources, .set_resources = pci_dev_set_resources, @@ -47,7 +103,7 @@ static struct device_operations acp_ops = { .init = init, .ops_pci = &pci_dev_ops_pci, .acpi_name = acp_acpi_name, - .acpi_fill_ssdt = acpi_device_write_pci_dev, + .acpi_fill_ssdt = acp_fill_ssdt, }; static const struct pci_driver acp_driver __pci_driver = { diff --git a/src/soc/amd/picasso/chip.h b/src/soc/amd/picasso/chip.h index f5fbe0fc2e..f11f800787 100644 --- a/src/soc/amd/picasso/chip.h +++ b/src/soc/amd/picasso/chip.h @@ -46,6 +46,9 @@ struct soc_amd_picasso_config { uint8_t flags; } irq_override[16]; + /* DMIC select GPIO for I2S machine driver AMDI5682 */ + struct acpi_gpio dmic_select_gpio; + /* Options for these are in src/arch/x86/include/acpi/acpi.h */ uint8_t fadt_pm_profile; uint16_t fadt_boot_arch; |