drm/radeon: add initial support for ATCS ACPI methods
Just verify the interface and track what functions are supported. Not actually used yet. Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Родитель
82e029357d
Коммит
e3a1592085
|
@ -1464,6 +1464,17 @@ struct radeon_atif {
|
|||
struct radeon_encoder *backlight_ctl;
|
||||
};
|
||||
|
||||
struct radeon_atcs_functions {
|
||||
bool get_ext_state;
|
||||
bool pcie_perf_req;
|
||||
bool pcie_dev_rdy;
|
||||
bool pcie_bus_width;
|
||||
};
|
||||
|
||||
struct radeon_atcs {
|
||||
struct radeon_atcs_functions functions;
|
||||
};
|
||||
|
||||
/*
|
||||
* Core structure, functions and helpers.
|
||||
*/
|
||||
|
@ -1557,6 +1568,7 @@ struct radeon_device {
|
|||
struct mutex gpu_clock_mutex;
|
||||
/* ACPI interface */
|
||||
struct radeon_atif atif;
|
||||
struct radeon_atcs atcs;
|
||||
};
|
||||
|
||||
int radeon_device_init(struct radeon_device *rdev,
|
||||
|
|
|
@ -74,6 +74,12 @@ struct atif_sbios_requests {
|
|||
#define ATIF_NOTIFY_81 1
|
||||
#define ATIF_NOTIFY_N 2
|
||||
|
||||
struct atcs_verify_interface {
|
||||
u16 size; /* structure size in bytes (includes size field) */
|
||||
u16 version; /* version */
|
||||
u32 function_bits; /* supported functions bit vector */
|
||||
} __packed;
|
||||
|
||||
/* Call the ATIF method
|
||||
*/
|
||||
/**
|
||||
|
@ -383,6 +389,118 @@ int radeon_atif_handler(struct radeon_device *rdev,
|
|||
return NOTIFY_BAD;
|
||||
}
|
||||
|
||||
/* Call the ATCS method
|
||||
*/
|
||||
/**
|
||||
* radeon_atcs_call - call an ATCS method
|
||||
*
|
||||
* @handle: acpi handle
|
||||
* @function: the ATCS function to execute
|
||||
* @params: ATCS function params
|
||||
*
|
||||
* Executes the requested ATCS function (all asics).
|
||||
* Returns a pointer to the acpi output buffer.
|
||||
*/
|
||||
static union acpi_object *radeon_atcs_call(acpi_handle handle, int function,
|
||||
struct acpi_buffer *params)
|
||||
{
|
||||
acpi_status status;
|
||||
union acpi_object atcs_arg_elements[2];
|
||||
struct acpi_object_list atcs_arg;
|
||||
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
|
||||
|
||||
atcs_arg.count = 2;
|
||||
atcs_arg.pointer = &atcs_arg_elements[0];
|
||||
|
||||
atcs_arg_elements[0].type = ACPI_TYPE_INTEGER;
|
||||
atcs_arg_elements[0].integer.value = function;
|
||||
|
||||
if (params) {
|
||||
atcs_arg_elements[1].type = ACPI_TYPE_BUFFER;
|
||||
atcs_arg_elements[1].buffer.length = params->length;
|
||||
atcs_arg_elements[1].buffer.pointer = params->pointer;
|
||||
} else {
|
||||
/* We need a second fake parameter */
|
||||
atcs_arg_elements[1].type = ACPI_TYPE_INTEGER;
|
||||
atcs_arg_elements[1].integer.value = 0;
|
||||
}
|
||||
|
||||
status = acpi_evaluate_object(handle, "ATCS", &atcs_arg, &buffer);
|
||||
|
||||
/* Fail only if calling the method fails and ATIF is supported */
|
||||
if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
|
||||
DRM_DEBUG_DRIVER("failed to evaluate ATCS got %s\n",
|
||||
acpi_format_exception(status));
|
||||
kfree(buffer.pointer);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
return buffer.pointer;
|
||||
}
|
||||
|
||||
/**
|
||||
* radeon_atcs_parse_functions - parse supported functions
|
||||
*
|
||||
* @f: supported functions struct
|
||||
* @mask: supported functions mask from ATCS
|
||||
*
|
||||
* Use the supported functions mask from ATCS function
|
||||
* ATCS_FUNCTION_VERIFY_INTERFACE to determine what functions
|
||||
* are supported (all asics).
|
||||
*/
|
||||
static void radeon_atcs_parse_functions(struct radeon_atcs_functions *f, u32 mask)
|
||||
{
|
||||
f->get_ext_state = mask & ATCS_GET_EXTERNAL_STATE_SUPPORTED;
|
||||
f->pcie_perf_req = mask & ATCS_PCIE_PERFORMANCE_REQUEST_SUPPORTED;
|
||||
f->pcie_dev_rdy = mask & ATCS_PCIE_DEVICE_READY_NOTIFICATION_SUPPORTED;
|
||||
f->pcie_bus_width = mask & ATCS_SET_PCIE_BUS_WIDTH_SUPPORTED;
|
||||
}
|
||||
|
||||
/**
|
||||
* radeon_atcs_verify_interface - verify ATCS
|
||||
*
|
||||
* @handle: acpi handle
|
||||
* @atcs: radeon atcs struct
|
||||
*
|
||||
* Execute the ATCS_FUNCTION_VERIFY_INTERFACE ATCS function
|
||||
* to initialize ATCS and determine what features are supported
|
||||
* (all asics).
|
||||
* returns 0 on success, error on failure.
|
||||
*/
|
||||
static int radeon_atcs_verify_interface(acpi_handle handle,
|
||||
struct radeon_atcs *atcs)
|
||||
{
|
||||
union acpi_object *info;
|
||||
struct atcs_verify_interface output;
|
||||
size_t size;
|
||||
int err = 0;
|
||||
|
||||
info = radeon_atcs_call(handle, ATCS_FUNCTION_VERIFY_INTERFACE, NULL);
|
||||
if (!info)
|
||||
return -EIO;
|
||||
|
||||
memset(&output, 0, sizeof(output));
|
||||
|
||||
size = *(u16 *) info->buffer.pointer;
|
||||
if (size < 8) {
|
||||
DRM_INFO("ATCS buffer is too small: %lu\n", size);
|
||||
err = -EINVAL;
|
||||
goto out;
|
||||
}
|
||||
size = min(sizeof(output), size);
|
||||
|
||||
memcpy(&output, info->buffer.pointer, size);
|
||||
|
||||
/* TODO: check version? */
|
||||
DRM_DEBUG_DRIVER("ATCS version %u\n", output.version);
|
||||
|
||||
radeon_atcs_parse_functions(&atcs->functions, output.function_bits);
|
||||
|
||||
out:
|
||||
kfree(info);
|
||||
return err;
|
||||
}
|
||||
|
||||
/**
|
||||
* radeon_acpi_event - handle notify events
|
||||
*
|
||||
|
@ -428,6 +546,7 @@ int radeon_acpi_init(struct radeon_device *rdev)
|
|||
{
|
||||
acpi_handle handle;
|
||||
struct radeon_atif *atif = &rdev->atif;
|
||||
struct radeon_atcs *atcs = &rdev->atcs;
|
||||
int ret;
|
||||
|
||||
/* Get the device handle */
|
||||
|
@ -437,10 +556,16 @@ int radeon_acpi_init(struct radeon_device *rdev)
|
|||
if (!ASIC_IS_AVIVO(rdev) || !rdev->bios || !handle)
|
||||
return 0;
|
||||
|
||||
/* Call the ATCS method */
|
||||
ret = radeon_atcs_verify_interface(handle, atcs);
|
||||
if (ret) {
|
||||
DRM_DEBUG_DRIVER("Call to ATCS verify_interface failed: %d\n", ret);
|
||||
}
|
||||
|
||||
/* Call the ATIF method */
|
||||
ret = radeon_atif_verify_interface(handle, atif);
|
||||
if (ret) {
|
||||
DRM_DEBUG_DRIVER("Call to verify_interface failed: %d\n", ret);
|
||||
DRM_DEBUG_DRIVER("Call to ATIF verify_interface failed: %d\n", ret);
|
||||
goto out;
|
||||
}
|
||||
|
||||
|
|
Загрузка…
Ссылка в новой задаче