diff options
-rw-r--r-- | drivers/gpu/drm/radeon/radeon_acpi.c | 38 |
1 files changed, 23 insertions, 15 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_acpi.c b/drivers/gpu/drm/radeon/radeon_acpi.c index e94929c6..f7b511d 100644 --- a/drivers/gpu/drm/radeon/radeon_acpi.c +++ b/drivers/gpu/drm/radeon/radeon_acpi.c @@ -37,23 +37,30 @@ #include <linux/vga_switcheroo.h> /* Call the ATIF method - * - * Note: currently we discard the output */ -static int radeon_atif_call(acpi_handle handle) +static union acpi_object *radeon_atif_call(acpi_handle handle, int function, + struct acpi_buffer *params) { acpi_status status; union acpi_object atif_arg_elements[2]; struct acpi_object_list atif_arg; - struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL}; + struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; atif_arg.count = 2; atif_arg.pointer = &atif_arg_elements[0]; atif_arg_elements[0].type = ACPI_TYPE_INTEGER; - atif_arg_elements[0].integer.value = ATIF_FUNCTION_VERIFY_INTERFACE; - atif_arg_elements[1].type = ACPI_TYPE_INTEGER; - atif_arg_elements[1].integer.value = 0; + atif_arg_elements[0].integer.value = function; + + if (params) { + atif_arg_elements[1].type = ACPI_TYPE_BUFFER; + atif_arg_elements[1].buffer.length = params->length; + atif_arg_elements[1].buffer.pointer = params->pointer; + } else { + /* We need a second fake parameter */ + atif_arg_elements[1].type = ACPI_TYPE_INTEGER; + atif_arg_elements[1].integer.value = 0; + } status = acpi_evaluate_object(handle, "ATIF", &atif_arg, &buffer); @@ -62,18 +69,18 @@ static int radeon_atif_call(acpi_handle handle) DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n", acpi_format_exception(status)); kfree(buffer.pointer); - return 1; + return NULL; } - kfree(buffer.pointer); - return 0; + return buffer.pointer; } /* Call all ACPI methods here */ int radeon_acpi_init(struct radeon_device *rdev) { acpi_handle handle; - int ret; + union acpi_object *info; + int ret = 0; /* Get the device handle */ handle = DEVICE_ACPI_HANDLE(&rdev->pdev->dev); @@ -83,10 +90,11 @@ int radeon_acpi_init(struct radeon_device *rdev) return 0; /* Call the ATIF method */ - ret = radeon_atif_call(handle); - if (ret) - return ret; + info = radeon_atif_call(handle, ATIF_FUNCTION_VERIFY_INTERFACE, NULL); + if (!info) + ret = -EIO; - return 0; + kfree(info); + return ret; } |