drm/amdgpu: fix check for port PM availability

[sfrench/cifs-2.6.git] / drivers / gpu / drm / amd / amdgpu / amdgpu_atpx_handler.c

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atpx_handler.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_atpx_handler.c
index 02ca5dd978f664ad31cbe248674514e707ce143f..6c343a9331825452a572a876649dc3b67eba28c4 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atpx_handler.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atpx_handler.c
@@ -485,7 +485,6 @@ static int amdgpu_atpx_power_state(enum vga_switcheroo_client_id id,
  */
 static bool amdgpu_atpx_pci_probe_handle(struct pci_dev *pdev)
 {
-       struct pci_dev *parent_pdev = pci_upstream_bridge(pdev);
        acpi_handle dhandle, atpx_handle;
        acpi_status status;
 
@@ -500,7 +499,6 @@ static bool amdgpu_atpx_pci_probe_handle(struct pci_dev *pdev)
        }
        amdgpu_atpx_priv.dhandle = dhandle;
        amdgpu_atpx_priv.atpx.handle = atpx_handle;
-       amdgpu_atpx_priv.bridge_pm_usable = parent_pdev && parent_pdev->bridge_d3;
        return true;
 }
 
@@ -562,17 +560,25 @@ static bool amdgpu_atpx_detect(void)
        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;
        }
 
        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;
        }
 
        if (has_atpx && vga_count == 2) {
@@ -580,6 +586,7 @@ static bool amdgpu_atpx_detect(void)
                printk(KERN_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;
        }