Add virtio-vga bits.

diff --git a/drivers/gpu/drm/virtio/virtgpu_drm_bus.c b/drivers/gpu/drm/virtio/virtgpu_drm_bus.c
index f4ec816..88a3916 100644 (file)
--- a/drivers/gpu/drm/virtio/virtgpu_drm_bus.c
+++ b/drivers/gpu/drm/virtio/virtgpu_drm_bus.c
@@ -37,6 +37,26 @@ int drm_virtio_set_busid(struct drm_device *dev, struct drm_master *master)
        return 0;
 }
 
+static void virtio_pci_kick_out_firmware_fb(struct pci_dev *pci_dev)
+{
+       struct apertures_struct *ap;
+       bool primary;
+
+       ap = alloc_apertures(1);
+       if (!ap)
+               return;
+
+       ap->ranges[0].base = pci_resource_start(pci_dev, 0);
+       ap->ranges[0].size = pci_resource_len(pci_dev, 0);
+
+       primary = pci_dev->resource[PCI_ROM_RESOURCE].flags
+               & IORESOURCE_ROM_SHADOW;
+
+       remove_conflicting_framebuffers(ap, "virtiodrmfb", primary);
+
+       kfree(ap);
+}
+
 int drm_virtio_init(struct drm_driver *driver, struct virtio_device *vdev)
 {
        struct drm_device *dev;
@@ -52,27 +72,11 @@ int drm_virtio_init(struct drm_driver *driver, struct virtio_device *vdev)
                struct pci_dev *pdev = to_pci_dev(vdev->dev.parent);
                bool vga = (pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA;
 
-               if (vga) {
-                       /*
-                        * Need to make sure we don't have two drivers
-                        * for the same hardware here.  Some day we
-                        * will simply kick out the firmware
-                        * (vesa/efi) framebuffer.
-                        *
-                        * Virtual hardware specs for virtio-vga are
-                        * not finalized yet, therefore we can't add
-                        * code for that yet.
-                        *
-                        * So ignore the device for the time being,
-                        * and suggest to the user use the device
-                        * variant without vga compatibility mode.
-                        */
-                       DRM_ERROR("virtio-vga not (yet) supported\n");
-                       DRM_ERROR("please use virtio-gpu-pci instead\n");
-                       ret = -ENODEV;
-                       goto err_free;
-               }
+               DRM_INFO("pci: %s detected\n",
+                        vga ? "virtio-vga" : "virtio-gpu-pci");
                dev->pdev = pdev;
+               if (vga)
+                       virtio_pci_kick_out_firmware_fb(pdev);
        }
 
        ret = drm_dev_register(dev, 0);