diff options
| author | Kane Chen <kane.chen@intel.com> | 2022-12-12 13:15:03 +0800 |
|---|---|---|
| committer | Eric Lai <eric_lai@quanta.corp-partner.google.com> | 2023-01-19 05:58:33 +0000 |
| commit | 56e448b8d5079e418d1be56c31a8e82bf5b95566 (patch) | |
| tree | 4f94e685564b470d72ad03964c9eb7fcd5eb8083 /src/drivers/usb/acpi | |
| parent | 56d831392566713ba416b822cf2416a6d78a51ae (diff) | |
drivers/usb/acpi: Add USB _DSM method to enable/disable USB LPM per port
This patch supports projects to use _DSM to control USB3 U1/U2
transition per port.
More details can be found in
https://web.archive.org/web/20230116084819/https://learn.microsoft.com/en-us/windows-hardware/drivers/bringup/usb-device-specific-method---dsm-
The ACPI and USB driver of linux kernel need corresponding functions
to support this feature. Please see
https://git.kernel.org/pub/scm/linux/kernel/git/mnyman/xhci.git/log/?h=port_check_acpi_dsm
BUG=b:253402457
TEST=tested on felwinter and found _DSM method is created.
Change-Id: Iffb2498e26352a3f120c097c50587324e311e8ba
Signed-off-by: Kane Chen <kane.chen@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/71924
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Diffstat (limited to 'src/drivers/usb/acpi')
| -rw-r--r-- | src/drivers/usb/acpi/chip.h | 6 | ||||
| -rw-r--r-- | src/drivers/usb/acpi/usb_acpi.c | 7 |
2 files changed, 13 insertions, 0 deletions
diff --git a/src/drivers/usb/acpi/chip.h b/src/drivers/usb/acpi/chip.h index 4adffcf2c0..9acd382c3d 100644 --- a/src/drivers/usb/acpi/chip.h +++ b/src/drivers/usb/acpi/chip.h @@ -72,6 +72,12 @@ struct drivers_usb_acpi_config { * will always return ON. */ bool use_gpio_for_status; + + /* + * Generate _DSM method Function 5 to disable USB U1/U2 transition + * for a port + */ + bool usb_lpm_incapable; }; /* Method to get PLD structure from USB device */ diff --git a/src/drivers/usb/acpi/usb_acpi.c b/src/drivers/usb/acpi/usb_acpi.c index f72129cba8..b95ebc9a60 100644 --- a/src/drivers/usb/acpi/usb_acpi.c +++ b/src/drivers/usb/acpi/usb_acpi.c @@ -3,6 +3,7 @@ #include <acpi/acpi_device.h> #include <acpi/acpi_pld.h> #include <acpi/acpigen.h> +#include <acpi/acpigen_dsm.h> #include <console/console.h> #include <device/device.h> #include <device/path.h> @@ -38,6 +39,7 @@ static void usb_acpi_fill_ssdt_generator(const struct device *dev) struct drivers_usb_acpi_config *config = dev->chip_info; const char *path = acpi_device_path(dev); struct acpi_pld pld; + struct dsm_usb_config usb_cfg; if (!path || !config) return; @@ -56,6 +58,11 @@ static void usb_acpi_fill_ssdt_generator(const struct device *dev) else printk(BIOS_ERR, "Error retrieving PLD for %s\n", path); + if (config->usb_lpm_incapable) { + usb_cfg.usb_lpm_incapable = 1; + acpigen_write_dsm_usb(&usb_cfg); + } + /* Resources */ if (usb_acpi_add_gpios_to_crs(config) == true) { struct acpi_dp *dsd; |