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ACPICA: Add support for PCC Opregion special context data 

ACPICA commit 55526e8a6133cbf5a9cc0fb75a95dbbac6eb98e6

PCC Opregion added in ACPIC 6.3 requires special context data similar
to GPIO and Generic Serial Bus as it needs to know the internal PCC
buffer and its length as well as the PCC channel index when the opregion
handler is being executed by the OSPM.

Lets add support for the special context data needed by PCC Opregion.

Link: https://github.com/acpica/acpica/commit/55526e8a
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Sudeep Holla 2021-12-22 17:32:54 +01:00 committed by Rafael J. Wysocki
parent 9a3b8655db
commit 0acf24ad7e
2 changed files with 18 additions and 0 deletions
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10
drivers/acpi/acpica/evregion.c
View File

@ -162,6 +162,16 @@ acpi_ev_address_space_dispatch(union acpi_operand_object *region_obj,
return_ACPI_STATUS(AE_NOT_EXIST);
}
if (region_obj->region.space_id == ACPI_ADR_SPACE_PLATFORM_COMM) {
struct acpi_pcc_info *ctx =
handler_desc->address_space.context;
ctx->internal_buffer =
field_obj->field.internal_pcc_buffer;
ctx->length = region_obj->region.length;
ctx->subspace_id = region_obj->region.address;
}
/*
* We must exit the interpreter because the region setup will
* potentially execute control methods (for example, the _REG method

8
include/acpi/actypes.h
View File

@ -1103,6 +1103,14 @@ struct acpi_connection_info {
u8 access_length;
};
/* Special Context data for PCC Opregion (ACPI 6.3) */
struct acpi_pcc_info {
u8 subspace_id;
u16 length;
u8 *internal_buffer;
};
typedef
acpi_status (*acpi_adr_space_setup) (acpi_handle region_handle,
u32 function,