On Wed, Dec 11, 2019 at 12:42 AM Gerd Hoffmann <kraxel@xxxxxxxxxx> wrote:
>
> Signed-off-by: Gerd Hoffmann <kraxel@xxxxxxxxxx>
> ---
> drivers/gpu/drm/virtio/virtgpu_plane.c | 41 +++++++++++++++-----------
> 1 file changed, 24 insertions(+), 17 deletions(-)
>
> diff --git a/drivers/gpu/drm/virtio/virtgpu_plane.c b/drivers/gpu/drm/virtio/virtgpu_plane.c
> index 2e0d14e005db..1a0fbbb91ec7 100644
> --- a/drivers/gpu/drm/virtio/virtgpu_plane.c
> +++ b/drivers/gpu/drm/virtio/virtgpu_plane.c
> @@ -24,6 +24,7 @@
> */
>
> #include <drm/drm_atomic_helper.h>
> +#include <drm/drm_damage_helper.h>
> #include <drm/drm_fourcc.h>
> #include <drm/drm_plane_helper.h>
>
> @@ -103,22 +104,26 @@ static int virtio_gpu_plane_atomic_check(struct drm_plane *plane,
> }
>
> static void virtio_gpu_update_dumb_bo(struct virtio_gpu_device *vgdev,
> - struct virtio_gpu_object *bo,
> - struct drm_plane_state *state)
> + struct drm_plane_state *state,
> + struct drm_rect *rect)
> {
> + struct virtio_gpu_object *bo =
> + gem_to_virtio_gpu_obj(state->fb->obj[0]);
> struct virtio_gpu_object_array *objs;
> + uint32_t w = rect->x2 - rect->x1;
> + uint32_t h = rect->y2 - rect->y1;
> + uint32_t x = rect->x1 + (state->src_x >> 16);
> + uint32_t y = rect->y1 + (state->src_y >> 16);
> + uint32_t off = x * state->fb->format->cpp[0] +
> + y * state->fb->pitches[0];
>
> objs = virtio_gpu_array_alloc(1);
> if (!objs)
> return;
> virtio_gpu_array_add_obj(objs, &bo->base.base);
> - virtio_gpu_cmd_transfer_to_host_2d
> - (vgdev, 0,
> - state->src_w >> 16,
> - state->src_h >> 16,
> - state->src_x >> 16,
> - state->src_y >> 16,
> - objs, NULL);
> +
> + virtio_gpu_cmd_transfer_to_host_2d(vgdev, off, w, h, x, y,
> + objs, NULL);
> }
>
> static void virtio_gpu_primary_plane_update(struct drm_plane *plane,
> @@ -127,8 +132,8 @@ static void virtio_gpu_primary_plane_update(struct drm_plane *plane,
> struct drm_device *dev = plane->dev;
> struct virtio_gpu_device *vgdev = dev->dev_private;
> struct virtio_gpu_output *output = NULL;
> - struct virtio_gpu_framebuffer *vgfb;
> struct virtio_gpu_object *bo;
> + struct drm_rect rect;
>
> if (plane->state->crtc)
> output = drm_crtc_to_virtio_gpu_output(plane->state->crtc);
> @@ -146,12 +151,14 @@ static void virtio_gpu_primary_plane_update(struct drm_plane *plane,
> return;
> }
>
> + if (!drm_atomic_helper_damage_merged(old_state, plane->state, &rect))
> + return;
> +
> virtio_gpu_disable_notify(vgdev);
>
> - vgfb = to_virtio_gpu_framebuffer(plane->state->fb);
> - bo = gem_to_virtio_gpu_obj(vgfb->base.obj[0]);
> + bo = gem_to_virtio_gpu_obj(plane->state->fb->obj[0]);
> if (bo->dumb)
> - virtio_gpu_update_dumb_bo(vgdev, bo, plane->state);
> + virtio_gpu_update_dumb_bo(vgdev, plane->state, &rect);
>
> if (plane->state->fb != old_state->fb) {
> DRM_DEBUG("handle 0x%x, crtc %dx%d+%d+%d, src %dx%d+%d+%d\n",
> @@ -171,10 +178,10 @@ static void virtio_gpu_primary_plane_update(struct drm_plane *plane,
> }
>
> virtio_gpu_cmd_resource_flush(vgdev, bo->hw_res_handle,
> - plane->state->src_x >> 16,
> - plane->state->src_y >> 16,
> - plane->state->src_w >> 16,
> - plane->state->src_h >> 16);
> + (plane->state->src_x >> 16) + rect.x1,
> + (plane->state->src_y >> 16) + rect.y1,
Digging into drm_atomic_helper_damage_merged, it seems rect uses
absolute values and is not relative to src_{x,y}.
> + rect.x2 - rect.x1,
> + rect.y2 - rect.y1);
>
> virtio_gpu_enable_notify(vgdev);
> }
> --
> 2.18.1
>
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