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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>
This commit is contained in:
Kane Chen 2022-12-12 13:15:03 +08:00 committed by Eric Lai
parent 56d8313925
commit 56e448b8d5
4 changed files with 41 additions and 0 deletions
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23
src/acpi/acpigen_dsm.c
View File

@ -47,3 +47,26 @@ void acpigen_write_dsm_i2c_hid(struct dsm_i2c_hid_config *config)
}
/* ------------------- End: I2C HID DSM ------------------------- */
#define USB_DSM_UUID "CE2EE385-00E6-48CB-9F05-2EDB927C4899"
static void usb_dsm_func5_cb(void *arg)
{
struct dsm_usb_config *config = arg;
acpigen_write_return_byte(config->usb_lpm_incapable);
}
static void (*usb_dsm_callbacks[6])(void *) = {
NULL,
NULL,
NULL,
NULL,
NULL,
usb_dsm_func5_cb,
};
void acpigen_write_dsm_usb(struct dsm_usb_config *config)
{
acpigen_write_dsm(USB_DSM_UUID, usb_dsm_callbacks,
ARRAY_SIZE(usb_dsm_callbacks), config);
}

6
src/drivers/usb/acpi/chip.h
View File

@ -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 */

7
src/drivers/usb/acpi/usb_acpi.c
View File

@ -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;

5
src/include/acpi/acpigen_dsm.h
View File

@ -11,4 +11,9 @@ struct dsm_i2c_hid_config {
void acpigen_write_dsm_i2c_hid(struct dsm_i2c_hid_config *config);
struct dsm_usb_config {
uint8_t usb_lpm_incapable;
};
void acpigen_write_dsm_usb(struct dsm_usb_config *config);
#endif /* __ACPI_ACPIGEN_DSM_H__ */