drm/virtio: add edid support
linux guest driver implementation of the VIRTIO_GPU_F_EDID feature.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Daniel Vetter <daniel@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20181030063206.19528-3-kraxel@redhat.com
diff --git a/drivers/gpu/drm/virtio/virtgpu_kms.c b/drivers/gpu/drm/virtio/virtgpu_kms.c
index 691b842..3af6181 100644
--- a/drivers/gpu/drm/virtio/virtgpu_kms.c
+++ b/drivers/gpu/drm/virtio/virtgpu_kms.c
@@ -44,6 +44,8 @@ static void virtio_gpu_config_changed_work_func(struct work_struct *work)
virtio_cread(vgdev->vdev, struct virtio_gpu_config,
events_read, &events_read);
if (events_read & VIRTIO_GPU_EVENT_DISPLAY) {
+ if (vgdev->has_edid)
+ virtio_gpu_cmd_get_edids(vgdev);
virtio_gpu_cmd_get_display_info(vgdev);
drm_helper_hpd_irq_event(vgdev->ddev);
events_clear |= VIRTIO_GPU_EVENT_DISPLAY;
@@ -156,6 +158,10 @@ int virtio_gpu_driver_load(struct drm_device *dev, unsigned long flags)
#else
DRM_INFO("virgl 3d acceleration not supported by guest\n");
#endif
+ if (virtio_has_feature(vgdev->vdev, VIRTIO_GPU_F_EDID)) {
+ vgdev->has_edid = true;
+ DRM_INFO("EDID support available.\n");
+ }
ret = virtio_find_vqs(vgdev->vdev, 2, vqs, callbacks, names, NULL);
if (ret) {
@@ -201,6 +207,8 @@ int virtio_gpu_driver_load(struct drm_device *dev, unsigned long flags)
if (num_capsets)
virtio_gpu_get_capsets(vgdev, num_capsets);
+ if (vgdev->has_edid)
+ virtio_gpu_cmd_get_edids(vgdev);
virtio_gpu_cmd_get_display_info(vgdev);
wait_event_timeout(vgdev->resp_wq, !vgdev->display_info_pending,
5 * HZ);