/**
* amdgpu_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 amdgpu_atpx_detect(void)
{
char acpi_method_name[255] = { 0 };
struct 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 |= (amdgpu_atpx_pci_probe_handle(pdev) == true);
}
while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_OTHER << 8, pdev)) != NULL) {
vga_count++;
has_atpx |= (amdgpu_atpx_pci_probe_handle(pdev) == true);
}
if (has_atpx && vga_count == 2) {
acpi_get_name(amdgpu_atpx_priv.atpx.handle, ACPI_FULL_PATHNAME, &buffer);
printk(KERN_INFO "vga_switcheroo: detected switching method %s handle\n",
acpi_method_name);
amdgpu_atpx_priv.atpx_detected = true;
amdgpu_atpx_init();
return true;
}
return false;
}
/**
* amdgpu_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 amdgpu_atpx_detect(void)
{
char acpi_method_name[255] = { 0 };
struct acpi_buffer buffer = {sizeof(acpi_method_name), acpi_method_name};
struct pci_dev *pdev = NULL;
bool has_atpx = false;
int vga_count = 0;
bool d3_supported = false;
struct pci_dev *parent_pdev;
while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) {
vga_count++;
has_atpx |= (amdgpu_atpx_pci_probe_handle(pdev) == true);
parent_pdev = pci_upstream_bridge(pdev);
d3_supported |= parent_pdev && parent_pdev->bridge_d3;
amdgpu_atpx_get_quirks(pdev);
}
while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_OTHER << 8, pdev)) != NULL) {
vga_count++;
has_atpx |= (amdgpu_atpx_pci_probe_handle(pdev) == true);
parent_pdev = pci_upstream_bridge(pdev);
d3_supported |= parent_pdev && parent_pdev->bridge_d3;
amdgpu_atpx_get_quirks(pdev);
}
if (has_atpx && vga_count == 2) {
acpi_get_name(amdgpu_atpx_priv.atpx.handle, ACPI_FULL_PATHNAME, &buffer);
pr_info("vga_switcheroo: detected switching method %s handle\n",
acpi_method_name);
amdgpu_atpx_priv.atpx_detected = true;
amdgpu_atpx_priv.bridge_pm_usable = d3_supported;
amdgpu_atpx_init();
return true;
}
return false;
}