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Merge remote branch 'korg/drm-nvidia-switch-fixes' into drm-core-next

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* korg/drm-nvidia-switch-fixes:
  mxm/wmi: add MXMX interface entry point.
  nouveau: add optimus detection to DSM code.
  vgaarb: use bridges to control VGA routing where possible.
  nouveau/acpi: hook up to the MXM method for mux switching.
  platform/x86: add MXM WMI driver.
This commit is contained in:
Dave Airlie 2011-05-09 13:23:18 +10:00
commit 269dc2d919
9 changed files with 368 additions and 38 deletions
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1
drivers/gpu/drm/nouveau/Kconfig
View File

@ -11,6 +11,7 @@ config DRM_NOUVEAU
select FRAMEBUFFER_CONSOLE if !EXPERT
select FB_BACKLIGHT if DRM_NOUVEAU_BACKLIGHT
select ACPI_VIDEO if ACPI && X86 && BACKLIGHT_CLASS_DEVICE && VIDEO_OUTPUT_CONTROL && INPUT
select MXM_WMI if ACPI
help
Choose this option for open-source nVidia support.

108
drivers/gpu/drm/nouveau/nouveau_acpi.c
View File

@ -4,6 +4,8 @@
#include <acpi/acpi_drivers.h>
#include <acpi/acpi_bus.h>
#include <acpi/video.h>
#include <acpi/acpi.h>
#include <linux/mxm-wmi.h>
#include "drmP.h"
#include "drm.h"
@ -35,15 +37,71 @@
static struct nouveau_dsm_priv {
bool dsm_detected;
bool optimus_detected;
acpi_handle dhandle;
acpi_handle rom_handle;
} nouveau_dsm_priv;
#define NOUVEAU_DSM_HAS_MUX 0x1
#define NOUVEAU_DSM_HAS_OPT 0x2
static const char nouveau_dsm_muid[] = {
0xA0, 0xA0, 0x95, 0x9D, 0x60, 0x00, 0x48, 0x4D,
0xB3, 0x4D, 0x7E, 0x5F, 0xEA, 0x12, 0x9F, 0xD4,
};
static const char nouveau_op_dsm_muid[] = {
0xF8, 0xD8, 0x86, 0xA4, 0xDA, 0x0B, 0x1B, 0x47,
0xA7, 0x2B, 0x60, 0x42, 0xA6, 0xB5, 0xBE, 0xE0,
};
static int nouveau_optimus_dsm(acpi_handle handle, int func, int arg, uint32_t *result)
{
struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
struct acpi_object_list input;
union acpi_object params[4];
union acpi_object *obj;
int err;
input.count = 4;
input.pointer = params;
params[0].type = ACPI_TYPE_BUFFER;
params[0].buffer.length = sizeof(nouveau_op_dsm_muid);
params[0].buffer.pointer = (char *)nouveau_op_dsm_muid;
params[1].type = ACPI_TYPE_INTEGER;
params[1].integer.value = 0x00000100;
params[2].type = ACPI_TYPE_INTEGER;
params[2].integer.value = func;
params[3].type = ACPI_TYPE_BUFFER;
params[3].buffer.length = 0;
err = acpi_evaluate_object(handle, "_DSM", &input, &output);
if (err) {
printk(KERN_INFO "failed to evaluate _DSM: %d\n", err);
return err;
}
obj = (union acpi_object *)output.pointer;
if (obj->type == ACPI_TYPE_INTEGER)
if (obj->integer.value == 0x80000002) {
return -ENODEV;
}
if (obj->type == ACPI_TYPE_BUFFER) {
if (obj->buffer.length == 4 && result) {
*result = 0;
*result |= obj->buffer.pointer[0];
*result |= (obj->buffer.pointer[1] << 8);
*result |= (obj->buffer.pointer[2] << 16);
*result |= (obj->buffer.pointer[3] << 24);
}
}
kfree(output.pointer);
return 0;
}
static int nouveau_dsm(acpi_handle handle, int func, int arg, uint32_t *result)
{
struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
@ -92,6 +150,8 @@ static int nouveau_dsm(acpi_handle handle, int func, int arg, uint32_t *result)
static int nouveau_dsm_switch_mux(acpi_handle handle, int mux_id)
{
mxm_wmi_call_mxmx(mux_id == NOUVEAU_DSM_LED_STAMINA ? MXM_MXDS_ADAPTER_IGD : MXM_MXDS_ADAPTER_0);
mxm_wmi_call_mxds(mux_id == NOUVEAU_DSM_LED_STAMINA ? MXM_MXDS_ADAPTER_IGD : MXM_MXDS_ADAPTER_0);
return nouveau_dsm(handle, NOUVEAU_DSM_LED, mux_id, NULL);
}
@ -148,11 +208,11 @@ static struct vga_switcheroo_handler nouveau_dsm_handler = {
.get_client_id = nouveau_dsm_get_client_id,
};
static bool nouveau_dsm_pci_probe(struct pci_dev *pdev)
static int nouveau_dsm_pci_probe(struct pci_dev *pdev)
{
acpi_handle dhandle, nvidia_handle;
acpi_status status;
int ret;
int ret, retval = 0;
uint32_t result;
dhandle = DEVICE_ACPI_HANDLE(&pdev->dev);
@ -166,11 +226,17 @@ static bool nouveau_dsm_pci_probe(struct pci_dev *pdev)
ret = nouveau_dsm(dhandle, NOUVEAU_DSM_SUPPORTED,
NOUVEAU_DSM_SUPPORTED_FUNCTIONS, &result);
if (ret < 0)
return false;
if (ret == 0)
retval |= NOUVEAU_DSM_HAS_MUX;
nouveau_dsm_priv.dhandle = dhandle;
return true;
ret = nouveau_optimus_dsm(dhandle, 0, 0, &result);
if (ret == 0)
retval |= NOUVEAU_DSM_HAS_OPT;
if (retval)
nouveau_dsm_priv.dhandle = dhandle;
return retval;
}
static bool nouveau_dsm_detect(void)
@ -179,22 +245,42 @@ static bool nouveau_dsm_detect(void)
struct acpi_buffer buffer = {sizeof(acpi_method_name), acpi_method_name};
struct pci_dev *pdev = NULL;
int has_dsm = 0;
int has_optimus;
int vga_count = 0;
bool guid_valid;
int retval;
bool ret = false;
/* lookup the MXM GUID */
guid_valid = mxm_wmi_supported();
if (guid_valid)
printk("MXM: GUID detected in BIOS\n");
/* now do DSM detection */
while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) {
vga_count++;
has_dsm |= (nouveau_dsm_pci_probe(pdev) == true);
retval = nouveau_dsm_pci_probe(pdev);
printk("ret val is %d\n", retval);
if (retval & NOUVEAU_DSM_HAS_MUX)
has_dsm |= 1;
if (retval & NOUVEAU_DSM_HAS_OPT)
has_optimus = 1;
}
if (vga_count == 2 && has_dsm) {
if (vga_count == 2 && has_dsm && guid_valid) {
acpi_get_name(nouveau_dsm_priv.dhandle, ACPI_FULL_PATHNAME, &buffer);
printk(KERN_INFO "VGA switcheroo: detected DSM switching method %s handle\n",
acpi_method_name);
nouveau_dsm_priv.dsm_detected = true;
return true;
ret = true;
}
return false;
if (has_optimus == 1)
nouveau_dsm_priv.optimus_detected = true;
return ret;
}
void nouveau_register_dsm_handler(void)
@ -247,7 +333,7 @@ bool nouveau_acpi_rom_supported(struct pci_dev *pdev)
acpi_status status;
acpi_handle dhandle, rom_handle;
if (!nouveau_dsm_priv.dsm_detected)
if (!nouveau_dsm_priv.dsm_detected && !nouveau_dsm_priv.optimus_detected)
return false;
dhandle = DEVICE_ACPI_HANDLE(&pdev->dev);

113
drivers/gpu/vga/vgaarb.c
View File

@ -61,7 +61,7 @@ struct vga_device {
unsigned int mem_lock_cnt; /* legacy MEM lock count */
unsigned int io_norm_cnt; /* normal IO count */
unsigned int mem_norm_cnt; /* normal MEM count */
bool bridge_has_one_vga;
/* allow IRQ enable/disable hook */
void *cookie;
void (*irq_set_state)(void *cookie, bool enable);
@ -165,6 +165,8 @@ static struct vga_device *__vga_tryget(struct vga_device *vgadev,
unsigned int wants, legacy_wants, match;
struct vga_device *conflict;
unsigned int pci_bits;
u32 flags = 0;
/* Account for "normal" resources to lock. If we decode the legacy,
* counterpart, we need to request it as well
*/
@ -237,16 +239,23 @@ static struct vga_device *__vga_tryget(struct vga_device *vgadev,
/* looks like he doesn't have a lock, we can steal
* them from him
*/
vga_irq_set_state(conflict, false);
flags = 0;
pci_bits = 0;
if (lwants & (VGA_RSRC_LEGACY_MEM|VGA_RSRC_NORMAL_MEM))
pci_bits |= PCI_COMMAND_MEMORY;
if (lwants & (VGA_RSRC_LEGACY_IO|VGA_RSRC_NORMAL_IO))
pci_bits |= PCI_COMMAND_IO;
pci_set_vga_state(conflict->pdev, false, pci_bits,
change_bridge);
if (!conflict->bridge_has_one_vga) {
vga_irq_set_state(conflict, false);
flags |= PCI_VGA_STATE_CHANGE_DECODES;
if (lwants & (VGA_RSRC_LEGACY_MEM|VGA_RSRC_NORMAL_MEM))
pci_bits |= PCI_COMMAND_MEMORY;
if (lwants & (VGA_RSRC_LEGACY_IO|VGA_RSRC_NORMAL_IO))
pci_bits |= PCI_COMMAND_IO;
}
if (change_bridge)
flags |= PCI_VGA_STATE_CHANGE_BRIDGE;
pci_set_vga_state(conflict->pdev, false, pci_bits, flags);
conflict->owns &= ~lwants;
/* If he also owned non-legacy, that is no longer the case */
if (lwants & VGA_RSRC_LEGACY_MEM)
@ -261,14 +270,24 @@ enable_them:
* also have in "decodes". We can lock resources we don't decode but
* not own them.
*/
flags = 0;
pci_bits = 0;
if (wants & (VGA_RSRC_LEGACY_MEM|VGA_RSRC_NORMAL_MEM))
pci_bits |= PCI_COMMAND_MEMORY;
if (wants & (VGA_RSRC_LEGACY_IO|VGA_RSRC_NORMAL_IO))
pci_bits |= PCI_COMMAND_IO;
pci_set_vga_state(vgadev->pdev, true, pci_bits, !!(wants & VGA_RSRC_LEGACY_MASK));
vga_irq_set_state(vgadev, true);
if (!vgadev->bridge_has_one_vga) {
flags |= PCI_VGA_STATE_CHANGE_DECODES;
if (wants & (VGA_RSRC_LEGACY_MEM|VGA_RSRC_NORMAL_MEM))
pci_bits |= PCI_COMMAND_MEMORY;
if (wants & (VGA_RSRC_LEGACY_IO|VGA_RSRC_NORMAL_IO))
pci_bits |= PCI_COMMAND_IO;
}
if (!!(wants & VGA_RSRC_LEGACY_MASK))
flags |= PCI_VGA_STATE_CHANGE_BRIDGE;
pci_set_vga_state(vgadev->pdev, true, pci_bits, flags);
if (!vgadev->bridge_has_one_vga) {
vga_irq_set_state(vgadev, true);
}
vgadev->owns |= (wants & vgadev->decodes);
lock_them:
vgadev->locks |= (rsrc & VGA_RSRC_LEGACY_MASK);
@ -421,6 +440,62 @@ bail:
}
EXPORT_SYMBOL(vga_put);
/* Rules for using a bridge to control a VGA descendant decoding:
if a bridge has only one VGA descendant then it can be used
to control the VGA routing for that device.
It should always use the bridge closest to the device to control it.
If a bridge has a direct VGA descendant, but also have a sub-bridge
VGA descendant then we cannot use that bridge to control the direct VGA descendant.
So for every device we register, we need to iterate all its parent bridges
so we can invalidate any devices using them properly.
*/
static void vga_arbiter_check_bridge_sharing(struct vga_device *vgadev)
{
struct vga_device *same_bridge_vgadev;
struct pci_bus *new_bus, *bus;
struct pci_dev *new_bridge, *bridge;
vgadev->bridge_has_one_vga = true;
if (list_empty(&vga_list))
return;
/* okay iterate the new devices bridge hierarachy */
new_bus = vgadev->pdev->bus;
while (new_bus) {
new_bridge = new_bus->self;
if (new_bridge) {
/* go through list of devices already registered */
list_for_each_entry(same_bridge_vgadev, &vga_list, list) {
bus = same_bridge_vgadev->pdev->bus;
bridge = bus->self;
/* see if the share a bridge with this device */
if (new_bridge == bridge) {
/* if their direct parent bridge is the same
as any bridge of this device then it can't be used
for that device */
same_bridge_vgadev->bridge_has_one_vga = false;
}
/* now iterate the previous devices bridge hierarchy */
/* if the new devices parent bridge is in the other devices
hierarchy then we can't use it to control this device */
while (bus) {
bridge = bus->self;
if (bridge) {
if (bridge == vgadev->pdev->bus->self)
vgadev->bridge_has_one_vga = false;
}
bus = bus->parent;
}
}
}
new_bus = new_bus->parent;
}
}
/*
* Currently, we assume that the "initial" setup of the system is
* not sane, that is we come up with conflicting devices and let
@ -500,6 +575,8 @@ static bool vga_arbiter_add_pci_device(struct pci_dev *pdev)
vga_default = pci_dev_get(pdev);
#endif
vga_arbiter_check_bridge_sharing(vgadev);
/* Add to the list */
list_add(&vgadev->list, &vga_list);
vga_count++;
@ -1222,6 +1299,7 @@ static int __init vga_arb_device_init(void)
{
int rc;
struct pci_dev *pdev;
struct vga_device *vgadev;
rc = misc_register(&vga_arb_device);
if (rc < 0)
@ -1238,6 +1316,13 @@ static int __init vga_arb_device_init(void)
vga_arbiter_add_pci_device(pdev);
pr_info("vgaarb: loaded\n");
list_for_each_entry(vgadev, &vga_list, list) {
if (vgadev->bridge_has_one_vga)
pr_info("vgaarb: bridge control possible %s\n", pci_name(vgadev->pdev));
else
pr_info("vgaarb: no bridge control possible %s\n", pci_name(vgadev->pdev));
}
return rc;
}
subsys_initcall(vga_arb_device_init);

25
drivers/pci/pci.c
View File

@ -2875,31 +2875,34 @@ static int pci_set_vga_state_arch(struct pci_dev *dev, bool decode,
* @dev: the PCI device
* @decode: true = enable decoding, false = disable decoding
* @command_bits: PCI_COMMAND_IO and/or PCI_COMMAND_MEMORY
* @change_bridge: traverse ancestors and change bridges
* @change_bridge_flags: traverse ancestors and change bridges
* CHANGE_BRIDGE_ONLY / CHANGE_BRIDGE
*/
int pci_set_vga_state(struct pci_dev *dev, bool decode,
unsigned int command_bits, bool change_bridge)
unsigned int command_bits, u32 flags)
{
struct pci_bus *bus;
struct pci_dev *bridge;
u16 cmd;
int rc;
WARN_ON(command_bits & ~(PCI_COMMAND_IO|PCI_COMMAND_MEMORY));
WARN_ON((flags & PCI_VGA_STATE_CHANGE_DECODES) & (command_bits & ~(PCI_COMMAND_IO|PCI_COMMAND_MEMORY)));
/* ARCH specific VGA enables */
rc = pci_set_vga_state_arch(dev, decode, command_bits, change_bridge);
rc = pci_set_vga_state_arch(dev, decode, command_bits, flags);
if (rc)
return rc;
pci_read_config_word(dev, PCI_COMMAND, &cmd);
if (decode == true)
cmd |= command_bits;
else
cmd &= ~command_bits;
pci_write_config_word(dev, PCI_COMMAND, cmd);
if (flags & PCI_VGA_STATE_CHANGE_DECODES) {
pci_read_config_word(dev, PCI_COMMAND, &cmd);
if (decode == true)
cmd |= command_bits;
else
cmd &= ~command_bits;
pci_write_config_word(dev, PCI_COMMAND, cmd);
}
if (change_bridge == false)
if (!(flags & PCI_VGA_STATE_CHANGE_BRIDGE))
return 0;
bus = dev->bus;

7
drivers/platform/x86/Kconfig
View File

@ -753,4 +753,11 @@ config SAMSUNG_LAPTOP
To compile this driver as a module, choose M here: the module
will be called samsung-laptop.
config MXM_WMI
tristate "WMI support for MXM Laptop Graphics"
depends on WMI
---help---
MXM is a standard for laptop graphics cards, the WMI interface
is required for switchable nvidia graphics machines
endif # X86_PLATFORM_DEVICES

1
drivers/platform/x86/Makefile
View File

@ -42,3 +42,4 @@ obj-$(CONFIG_XO15_EBOOK) += xo15-ebook.o
obj-$(CONFIG_IBM_RTL) += ibm_rtl.o
obj-$(CONFIG_SAMSUNG_LAPTOP) += samsung-laptop.o
obj-$(CONFIG_INTEL_MFLD_THERMAL) += intel_mid_thermal.o
obj-$(CONFIG_MXM_WMI) += mxm-wmi.o

111
drivers/platform/x86/mxm-wmi.c Normal file
View File

@ -0,0 +1,111 @@
/*
* MXM WMI driver
*
* Copyright(C) 2010 Red Hat.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
MODULE_AUTHOR("Dave Airlie");
MODULE_DESCRIPTION("MXM WMI Driver");
MODULE_LICENSE("GPL");
#define MXM_WMMX_GUID "F6CB5C3C-9CAE-4EBD-B577-931EA32A2CC0"
MODULE_ALIAS("wmi:"MXM_WMMX_GUID);
#define MXM_WMMX_FUNC_MXDS 0x5344584D /* "MXDS" */
#define MXM_WMMX_FUNC_MXMX 0x53445344 /* "MXMX" */
struct mxds_args {
u32 func;
u32 args;
u32 xarg;
};
int mxm_wmi_call_mxds(int adapter)
{
struct mxds_args args = {
.func = MXM_WMMX_FUNC_MXDS,
.args = 0,
.xarg = 1,
};
struct acpi_buffer input = { (acpi_size)sizeof(args), &args };
struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
acpi_status status;
printk("calling mux switch %d\n", adapter);
status = wmi_evaluate_method(MXM_WMMX_GUID, 0x1, adapter, &input,
&output);
if (ACPI_FAILURE(status))
return status;
printk("mux switched %d\n", status);
return 0;
}
EXPORT_SYMBOL_GPL(mxm_wmi_call_mxds);
int mxm_wmi_call_mxmx(int adapter)
{
struct mxds_args args = {
.func = MXM_WMMX_FUNC_MXMX,
.args = 0,
.xarg = 1,
};
struct acpi_buffer input = { (acpi_size)sizeof(args), &args };
struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
acpi_status status;
printk("calling mux switch %d\n", adapter);
status = wmi_evaluate_method(MXM_WMMX_GUID, 0x1, adapter, &input,
&output);
if (ACPI_FAILURE(status))
return status;
printk("mux mutex set switched %d\n", status);
return 0;
}
EXPORT_SYMBOL_GPL(mxm_wmi_call_mxmx);
bool mxm_wmi_supported(void)
{
bool guid_valid;
guid_valid = wmi_has_guid(MXM_WMMX_GUID);
return guid_valid;
}
EXPORT_SYMBOL_GPL(mxm_wmi_supported);
static int __init mxm_wmi_init(void)
{
return 0;
}
static void __exit mxm_wmi_exit(void)
{
}
module_init(mxm_wmi_init);
module_exit(mxm_wmi_exit);

33
include/linux/mxm-wmi.h Normal file
View File

@ -0,0 +1,33 @@
/*
* MXM WMI driver
*
* Copyright(C) 2010 Red Hat.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef MXM_WMI_H
#define MXM_WMI_H
/* discrete adapters */
#define MXM_MXDS_ADAPTER_0 0x0
#define MXM_MXDS_ADAPTER_1 0x0
/* integrated adapter */
#define MXM_MXDS_ADAPTER_IGD 0x10
int mxm_wmi_call_mxds(int adapter);
int mxm_wmi_call_mxmx(int adapter);
bool mxm_wmi_supported(void);
#endif

7
include/linux/pci.h
View File

@ -915,8 +915,11 @@ int pci_cfg_space_size_ext(struct pci_dev *dev);
int pci_cfg_space_size(struct pci_dev *dev);
unsigned char pci_bus_max_busnr(struct pci_bus *bus);
#define PCI_VGA_STATE_CHANGE_BRIDGE (1 << 0)
#define PCI_VGA_STATE_CHANGE_DECODES (1 << 1)
int pci_set_vga_state(struct pci_dev *pdev, bool decode,
unsigned int command_bits, bool change_bridge);
unsigned int command_bits, u32 flags);
/* kmem_cache style wrapper around pci_alloc_consistent() */
#include <linux/pci-dma.h>
@ -1061,7 +1064,7 @@ static inline int pci_proc_domain(struct pci_bus *bus)
/* some architectures require additional setup to direct VGA traffic */
typedef int (*arch_set_vga_state_t)(struct pci_dev *pdev, bool decode,
unsigned int command_bits, bool change_bridge);
unsigned int command_bits, u32 flags);
extern void pci_register_set_vga_state(arch_set_vga_state_t func);
#else /* CONFIG_PCI is not enabled */