nouveau/acpi: improve detection of what is IGD and what is DIS.

This improves the IGD/DIS picking using firstly if Intel, then
if the bus is bus 0. There may be a correct way to do this, but
I've no idea what it is.

Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 8 insertions, 3 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_acpi.c b/drivers/gpu/drm/nouveau/nouveau_acpi.c
index 119152606e4c..a54238058dc5 100644
--- a/drivers/gpu/drm/nouveau/nouveau_acpi.c
+++ b/drivers/gpu/drm/nouveau/nouveau_acpi.c
@@ -130,10 +130,15 @@ static int nouveau_dsm_init(void)
 
 static int nouveau_dsm_get_client_id(struct pci_dev *pdev)
 {
-        if (nouveau_dsm_priv.dhandle == DEVICE_ACPI_HANDLE(&pdev->dev))
+        /* easy option one - intel vendor ID means Integrated */
+        if (pdev->vendor == PCI_VENDOR_ID_INTEL)
                 return VGA_SWITCHEROO_IGD;
-        else
-                return VGA_SWITCHEROO_DIS;
+
+        /* is this device on Bus 0? - this may need improving */
+        if (pdev->bus->number == 0)
+                return VGA_SWITCHEROO_IGD;
+
+        return VGA_SWITCHEROO_DIS;
 }
 
 static struct vga_switcheroo_handler nouveau_dsm_handler = {