freebsd-skq/sys/dev/drm2/radeon/radeon_atpx_handler.c
dumbbell 0d898a1422 drm/radeon: Import the Radeon KMS driver
This driver is based on Linux 3.8 and a previous effort by kan@.

More informations about this project can be found on the FreeBSD wiki:
    https://wiki.freebsd.org/AMD_GPU

The driver is split into:

  sys/dev/drm2:
    The driver sources.

  sys/modules/drm2/radeonkmw:
    The driver main kernel module's Makefile.

  sys/modules/drm2/radeonkmsfw:
    All firmware kernel module Makefiles. There's one directory and one
    Makefile for each firmware.

  sys/contrib/dev/drm2/radeonkmsfw:
    All firmware binary sources.

  tools/tools/drm/radeon
    Tools to update firmwares or regenerate some headers.

Merging the driver to FreeBSD 9.x may be possible but not a priority for
now.

Help from:	kib@, kan@
Tested by:	avg@, kwm@, ray@,
		Alexander Yerenkow <yerenkow@gmail.com>,
		Anders Bolt-Evensen <andersbo87@me.com>,
		Denis Djubajlo <stdedjub@googlemail.com>,
		J.R. Oldroyd <fbsd@opal.com>,
		Mikaël Urankar <mikael.urankar@gmail.com>,
		Pierre-Emmanuel Pédron <pepcitron@gmail.com>,
		Sam Fourman Jr. <sfourman@gmail.com>,
		Wade <wade-is-great@live.com>,
		(probably other I forgot...)
HW donations:	kyzh, Yakaz
2013-08-25 19:37:15 +00:00

507 lines
12 KiB
C

/*
* Copyright (c) 2010 Red Hat Inc.
* Author : Dave Airlie <airlied@redhat.com>
*
* Licensed under GPLv2
*
* ATPX support for both Intel/ATI
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/linker.h>
#include <contrib/dev/acpica/include/acpi.h>
#include <dev/acpica/acpivar.h>
#include <dev/drm2/drmP.h>
#include <dev/drm2/radeon/radeon_drm.h>
#include "radeon_acpi.h"
#include "radeon_drv.h"
#ifdef DUMBBELL_WIP
struct radeon_atpx_functions {
bool px_params;
bool power_cntl;
bool disp_mux_cntl;
bool i2c_mux_cntl;
bool switch_start;
bool switch_end;
bool disp_connectors_mapping;
bool disp_detetion_ports;
};
struct radeon_atpx {
ACPI_HANDLE handle;
struct radeon_atpx_functions functions;
};
static struct radeon_atpx_priv {
bool atpx_detected;
/* handle for device - and atpx */
ACPI_HANDLE dhandle;
struct radeon_atpx atpx;
} radeon_atpx_priv;
struct atpx_verify_interface {
u16 size; /* structure size in bytes (includes size field) */
u16 version; /* version */
u32 function_bits; /* supported functions bit vector */
} __packed;
struct atpx_power_control {
u16 size;
u8 dgpu_state;
} __packed;
struct atpx_mux {
u16 size;
u16 mux;
} __packed;
/**
* radeon_atpx_call - call an ATPX method
*
* @handle: acpi handle
* @function: the ATPX function to execute
* @params: ATPX function params
*
* Executes the requested ATPX function (all asics).
* Returns a pointer to the acpi output buffer.
*/
static ACPI_OBJECT *radeon_atpx_call(ACPI_HANDLE handle, int function,
ACPI_BUFFER *params)
{
ACPI_STATUS status;
ACPI_OBJECT atpx_arg_elements[2];
ACPI_OBJECT_LIST atpx_arg;
ACPI_BUFFER buffer = { ACPI_ALLOCATE_BUFFER, NULL };
atpx_arg.Count = 2;
atpx_arg.Pointer = &atpx_arg_elements[0];
atpx_arg_elements[0].Type = ACPI_TYPE_INTEGER;
atpx_arg_elements[0].Integer.Value = function;
if (params) {
atpx_arg_elements[1].Type = ACPI_TYPE_BUFFER;
atpx_arg_elements[1].Buffer.Length = params->Length;
atpx_arg_elements[1].Buffer.Pointer = params->Pointer;
} else {
/* We need a second fake parameter */
atpx_arg_elements[1].Type = ACPI_TYPE_INTEGER;
atpx_arg_elements[1].Integer.Value = 0;
}
status = AcpiEvaluateObject(handle, NULL, &atpx_arg, &buffer);
/* Fail only if calling the method fails and ATPX is supported */
if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
DRM_ERROR("failed to evaluate ATPX got %s\n",
AcpiFormatException(status));
AcpiOsFree(buffer.Pointer);
return NULL;
}
return buffer.Pointer;
}
/**
* radeon_atpx_parse_functions - parse supported functions
*
* @f: supported functions struct
* @mask: supported functions mask from ATPX
*
* Use the supported functions mask from ATPX function
* ATPX_FUNCTION_VERIFY_INTERFACE to determine what functions
* are supported (all asics).
*/
static void radeon_atpx_parse_functions(struct radeon_atpx_functions *f, u32 mask)
{
f->px_params = mask & ATPX_GET_PX_PARAMETERS_SUPPORTED;
f->power_cntl = mask & ATPX_POWER_CONTROL_SUPPORTED;
f->disp_mux_cntl = mask & ATPX_DISPLAY_MUX_CONTROL_SUPPORTED;
f->i2c_mux_cntl = mask & ATPX_I2C_MUX_CONTROL_SUPPORTED;
f->switch_start = mask & ATPX_GRAPHICS_DEVICE_SWITCH_START_NOTIFICATION_SUPPORTED;
f->switch_end = mask & ATPX_GRAPHICS_DEVICE_SWITCH_END_NOTIFICATION_SUPPORTED;
f->disp_connectors_mapping = mask & ATPX_GET_DISPLAY_CONNECTORS_MAPPING_SUPPORTED;
f->disp_detetion_ports = mask & ATPX_GET_DISPLAY_DETECTION_PORTS_SUPPORTED;
}
/**
* radeon_atpx_verify_interface - verify ATPX
*
* @handle: acpi handle
* @atpx: radeon atpx struct
*
* Execute the ATPX_FUNCTION_VERIFY_INTERFACE ATPX function
* to initialize ATPX and determine what features are supported
* (all asics).
* returns 0 on success, error on failure.
*/
static int radeon_atpx_verify_interface(struct radeon_atpx *atpx)
{
ACPI_OBJECT *info;
struct atpx_verify_interface output;
size_t size;
int err = 0;
info = radeon_atpx_call(atpx->handle, ATPX_FUNCTION_VERIFY_INTERFACE, NULL);
if (!info)
return -EIO;
memset(&output, 0, sizeof(output));
size = *(u16 *) info->Buffer.Pointer;
if (size < 8) {
DRM_ERROR("ATPX buffer is too small: %zu\n", size);
err = -EINVAL;
goto out;
}
size = min(sizeof(output), size);
memcpy(&output, info->Buffer.Pointer, size);
/* TODO: check version? */
DRM_INFO("ATPX version %u\n", output.version);
radeon_atpx_parse_functions(&atpx->functions, output.function_bits);
out:
AcpiOsFree(info);
return err;
}
/**
* radeon_atpx_set_discrete_state - power up/down discrete GPU
*
* @atpx: atpx info struct
* @state: discrete GPU state (0 = power down, 1 = power up)
*
* Execute the ATPX_FUNCTION_POWER_CONTROL ATPX function to
* power down/up the discrete GPU (all asics).
* Returns 0 on success, error on failure.
*/
static int radeon_atpx_set_discrete_state(struct radeon_atpx *atpx, u8 state)
{
ACPI_BUFFER params;
ACPI_OBJECT *info;
struct atpx_power_control input;
if (atpx->functions.power_cntl) {
input.size = 3;
input.dgpu_state = state;
params.Length = input.size;
params.Pointer = &input;
info = radeon_atpx_call(atpx->handle,
ATPX_FUNCTION_POWER_CONTROL,
&params);
if (!info)
return -EIO;
AcpiOsFree(info);
}
return 0;
}
/**
* radeon_atpx_switch_disp_mux - switch display mux
*
* @atpx: atpx info struct
* @mux_id: mux state (0 = integrated GPU, 1 = discrete GPU)
*
* Execute the ATPX_FUNCTION_DISPLAY_MUX_CONTROL ATPX function to
* switch the display mux between the discrete GPU and integrated GPU
* (all asics).
* Returns 0 on success, error on failure.
*/
static int radeon_atpx_switch_disp_mux(struct radeon_atpx *atpx, u16 mux_id)
{
ACPI_BUFFER params;
ACPI_OBJECT *info;
struct atpx_mux input;
if (atpx->functions.disp_mux_cntl) {
input.size = 4;
input.mux = mux_id;
params.Length = input.size;
params.Pointer = &input;
info = radeon_atpx_call(atpx->handle,
ATPX_FUNCTION_DISPLAY_MUX_CONTROL,
&params);
if (!info)
return -EIO;
AcpiOsFree(info);
}
return 0;
}
/**
* radeon_atpx_switch_i2c_mux - switch i2c/hpd mux
*
* @atpx: atpx info struct
* @mux_id: mux state (0 = integrated GPU, 1 = discrete GPU)
*
* Execute the ATPX_FUNCTION_I2C_MUX_CONTROL ATPX function to
* switch the i2c/hpd mux between the discrete GPU and integrated GPU
* (all asics).
* Returns 0 on success, error on failure.
*/
static int radeon_atpx_switch_i2c_mux(struct radeon_atpx *atpx, u16 mux_id)
{
ACPI_BUFFER params;
ACPI_OBJECT *info;
struct atpx_mux input;
if (atpx->functions.i2c_mux_cntl) {
input.size = 4;
input.mux = mux_id;
params.Length = input.size;
params.Pointer = &input;
info = radeon_atpx_call(atpx->handle,
ATPX_FUNCTION_I2C_MUX_CONTROL,
&params);
if (!info)
return -EIO;
AcpiOsFree(info);
}
return 0;
}
/**
* radeon_atpx_switch_start - notify the sbios of a GPU switch
*
* @atpx: atpx info struct
* @mux_id: mux state (0 = integrated GPU, 1 = discrete GPU)
*
* Execute the ATPX_FUNCTION_GRAPHICS_DEVICE_SWITCH_START_NOTIFICATION ATPX
* function to notify the sbios that a switch between the discrete GPU and
* integrated GPU has begun (all asics).
* Returns 0 on success, error on failure.
*/
static int radeon_atpx_switch_start(struct radeon_atpx *atpx, u16 mux_id)
{
ACPI_BUFFER params;
ACPI_OBJECT *info;
struct atpx_mux input;
if (atpx->functions.switch_start) {
input.size = 4;
input.mux = mux_id;
params.Length = input.size;
params.Pointer = &input;
info = radeon_atpx_call(atpx->handle,
ATPX_FUNCTION_GRAPHICS_DEVICE_SWITCH_START_NOTIFICATION,
&params);
if (!info)
return -EIO;
AcpiOsFree(info);
}
return 0;
}
/**
* radeon_atpx_switch_end - notify the sbios of a GPU switch
*
* @atpx: atpx info struct
* @mux_id: mux state (0 = integrated GPU, 1 = discrete GPU)
*
* Execute the ATPX_FUNCTION_GRAPHICS_DEVICE_SWITCH_END_NOTIFICATION ATPX
* function to notify the sbios that a switch between the discrete GPU and
* integrated GPU has ended (all asics).
* Returns 0 on success, error on failure.
*/
static int radeon_atpx_switch_end(struct radeon_atpx *atpx, u16 mux_id)
{
ACPI_BUFFER params;
ACPI_OBJECT *info;
struct atpx_mux input;
if (atpx->functions.switch_end) {
input.size = 4;
input.mux = mux_id;
params.Length = input.size;
params.Pointer = &input;
info = radeon_atpx_call(atpx->handle,
ATPX_FUNCTION_GRAPHICS_DEVICE_SWITCH_END_NOTIFICATION,
&params);
if (!info)
return -EIO;
AcpiOsFree(info);
}
return 0;
}
/**
* radeon_atpx_switchto - switch to the requested GPU
*
* @id: GPU to switch to
*
* Execute the necessary ATPX functions to switch between the discrete GPU and
* integrated GPU (all asics).
* Returns 0 on success, error on failure.
*/
static int radeon_atpx_switchto(enum vga_switcheroo_client_id id)
{
u16 gpu_id;
if (id == VGA_SWITCHEROO_IGD)
gpu_id = ATPX_INTEGRATED_GPU;
else
gpu_id = ATPX_DISCRETE_GPU;
radeon_atpx_switch_start(&radeon_atpx_priv.atpx, gpu_id);
radeon_atpx_switch_disp_mux(&radeon_atpx_priv.atpx, gpu_id);
radeon_atpx_switch_i2c_mux(&radeon_atpx_priv.atpx, gpu_id);
radeon_atpx_switch_end(&radeon_atpx_priv.atpx, gpu_id);
return 0;
}
/**
* radeon_atpx_power_state - power down/up the requested GPU
*
* @id: GPU to power down/up
* @state: requested power state (0 = off, 1 = on)
*
* Execute the necessary ATPX function to power down/up the discrete GPU
* (all asics).
* Returns 0 on success, error on failure.
*/
static int radeon_atpx_power_state(enum vga_switcheroo_client_id id,
enum vga_switcheroo_state state)
{
/* on w500 ACPI can't change intel gpu state */
if (id == VGA_SWITCHEROO_IGD)
return 0;
radeon_atpx_set_discrete_state(&radeon_atpx_priv.atpx, state);
return 0;
}
/**
* radeon_atpx_pci_probe_handle - look up the ATPX handle
*
* @pdev: pci device
*
* Look up the ATPX handles (all asics).
* Returns true if the handles are found, false if not.
*/
static bool radeon_atpx_pci_probe_handle(struct pci_dev *pdev)
{
ACPI_HANDLE dhandle, atpx_handle;
ACPI_STATUS status;
dhandle = DEVICE_ACPI_HANDLE(&pdev->dev);
if (!dhandle)
return false;
status = AcpiGetHandle(dhandle, "ATPX", &atpx_handle);
if (ACPI_FAILURE(status))
return false;
radeon_atpx_priv.dhandle = dhandle;
radeon_atpx_priv.atpx.handle = atpx_handle;
return true;
}
/**
* radeon_atpx_init - verify the ATPX interface
*
* Verify the ATPX interface (all asics).
* Returns 0 on success, error on failure.
*/
static int radeon_atpx_init(void)
{
/* set up the ATPX handle */
return radeon_atpx_verify_interface(&radeon_atpx_priv.atpx);
}
/**
* radeon_atpx_get_client_id - get the client id
*
* @pdev: pci device
*
* look up whether we are the integrated or discrete GPU (all asics).
* Returns the client id.
*/
static int radeon_atpx_get_client_id(struct pci_dev *pdev)
{
if (radeon_atpx_priv.dhandle == DEVICE_ACPI_HANDLE(&pdev->dev))
return VGA_SWITCHEROO_IGD;
else
return VGA_SWITCHEROO_DIS;
}
static struct vga_switcheroo_handler radeon_atpx_handler = {
.switchto = radeon_atpx_switchto,
.power_state = radeon_atpx_power_state,
.init = radeon_atpx_init,
.get_client_id = radeon_atpx_get_client_id,
};
/**
* radeon_atpx_detect - detect whether we have PX
*
* Check if we have a PX system (all asics).
* Returns true if we have a PX system, false if not.
*/
static bool radeon_atpx_detect(void)
{
char acpi_method_name[255] = { 0 };
ACPI_BUFFER buffer = {sizeof(acpi_method_name), acpi_method_name};
struct pci_dev *pdev = NULL;
bool has_atpx = false;
int vga_count = 0;
while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) {
vga_count++;
has_atpx |= (radeon_atpx_pci_probe_handle(pdev) == true);
}
if (has_atpx && vga_count == 2) {
AcpiGetName(radeon_atpx_priv.atpx.handle, ACPI_FULL_PATHNAME, &buffer);
DRM_INFO("VGA switcheroo: detected switching method %s handle\n",
acpi_method_name);
radeon_atpx_priv.atpx_detected = true;
return true;
}
return false;
}
#endif /* DUMBBELL_WIP */
/**
* radeon_register_atpx_handler - register with vga_switcheroo
*
* Register the PX callbacks with vga_switcheroo (all asics).
*/
void radeon_register_atpx_handler(void)
{
#ifdef DUMBBELL_WIP
bool r;
/* detect if we have any ATPX + 2 VGA in the system */
r = radeon_atpx_detect();
if (!r)
return;
vga_switcheroo_register_handler(&radeon_atpx_handler);
#endif /* DUMBBELL_WIP */
}
/**
* radeon_unregister_atpx_handler - unregister with vga_switcheroo
*
* Unregister the PX callbacks with vga_switcheroo (all asics).
*/
void radeon_unregister_atpx_handler(void)
{
#ifdef DUMBBELL_WIP
vga_switcheroo_unregister_handler();
#endif /* DUMBBELL_WIP */
}