Add freeze/restore callbacks to handle system suspend/resume. During freeze, delete virtqueues and reset device. During restore, reinitialize virtqueues and mark device ready.
Signed-off-by: Morris Pan <[email protected]> --- drivers/gpu/drm/virtio/virtgpu_drv.c | 40 +++++++++++++++++++++++++++- 1 file changed, 39 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.c b/drivers/gpu/drm/virtio/virtgpu_drv.c index a5ce96fb8a1d..fbca0a82958c 100644 --- a/drivers/gpu/drm/virtio/virtgpu_drv.c +++ b/drivers/gpu/drm/virtio/virtgpu_drv.c @@ -145,6 +145,40 @@ static void virtio_gpu_config_changed(struct virtio_device *vdev) schedule_work(&vgdev->config_changed_work); } +#ifdef CONFIG_PM_SLEEP +static int virtgpu_freeze(struct virtio_device *vdev) +{ + vdev->config->del_vqs(vdev); + virtio_reset_device(vdev); + + return 0; +} + +static int virtgpu_restore(struct virtio_device *vdev) +{ + int ret; + struct virtqueue *vqs[2]; + struct drm_device *dev = vdev->priv; + struct virtio_gpu_device *vgdev = dev->dev_private; + struct virtqueue_info vqs_info[] = { + { "control", virtio_gpu_ctrl_ack }, + { "cursor", virtio_gpu_cursor_ack }, + }; + + ret = virtio_find_vqs(vdev, 2, vqs, vqs_info, NULL); + if (ret) { + DRM_ERROR("failed to find virtio queues\n"); + return ret; + } + + vgdev->ctrlq.vq = vqs[0]; + vgdev->cursorq.vq = vqs[1]; + virtio_device_ready(vdev); + + return 0; +} +#endif + static struct virtio_device_id id_table[] = { { VIRTIO_ID_GPU, VIRTIO_DEV_ANY_ID }, { 0 }, @@ -172,7 +206,11 @@ static struct virtio_driver virtio_gpu_driver = { .probe = virtio_gpu_probe, .remove = virtio_gpu_remove, .shutdown = virtio_gpu_shutdown, - .config_changed = virtio_gpu_config_changed + .config_changed = virtio_gpu_config_changed, +#ifdef CONFIG_PM_SLEEP + .freeze = virtgpu_freeze, + .restore = virtgpu_restore +#endif }; static int __init virtio_gpu_driver_init(void) -- 2.45.2
