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nouveau: add optimus detection to DSM code.

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optimus has another DSM GUID, so we check for its existance,
also allow the BIOS stuff is we find it.

Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie 2011-03-22 14:10:27 +10:00
parent 3448a19da4
commit f19467c509
1 changed files with 89 additions and 15 deletions
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104
drivers/gpu/drm/nouveau/nouveau_acpi.c
View file

@ -37,15 +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 };
@ -151,11 +207,11 @@ 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);
@ -169,11 +225,17 @@ 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)
@ -182,30 +244,42 @@ 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 GUID */
/* lookup the MXM GUID */
guid_valid = mxm_wmi_supported();
if (!guid_valid)
return false;
printk("MXM GUID detected in BIOS\n");
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)
@ -258,7 +332,7 @@ 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);