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drm/virtio: New fence for every plane update

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Having a fence linked to a virtio_gpu_framebuffer in the plane update
sequence would cause conflict when several planes referencing the same
framebuffer (e.g. Xorg screen covering multi-displays configured for an
extended mode) and those planes are updated concurrently. So it is needed
to allocate a fence for every plane state instead of the framebuffer.

Signed-off-by: Dongwon Kim <dongwon.kim@intel.com>
[dmitry.osipenko@collabora.com: rebase, fix up, edit commit message]
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Acked-by: Vivek Kasireddy <vivek.kasireddy@intel.com>
Reviewed-by: Rob Clark <robdclark@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241020230803.247419-2-dmitry.osipenko@collabora.com
This commit is contained in:
Dongwon Kim
2024-10-21 02:08:03 +03:00
committed by Dmitry Osipenko
parent 30f86b8f86
commit d3c55b8ab6
2 changed files with 46 additions and 19 deletions
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58
drivers/gpu/drm/virtio/virtgpu_plane.c
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@@ -67,11 +67,28 @@ uint32_t virtio_gpu_translate_format(uint32_t drm_fourcc)
return format;
}
static struct
drm_plane_state *virtio_gpu_plane_duplicate_state(struct drm_plane *plane)
{
struct virtio_gpu_plane_state *new;
if (WARN_ON(!plane->state))
return NULL;
new = kzalloc(sizeof(*new), GFP_KERNEL);
if (!new)
return NULL;
__drm_atomic_helper_plane_duplicate_state(plane, &new->base);
return &new->base;
}
static const struct drm_plane_funcs virtio_gpu_plane_funcs = {
.update_plane = drm_atomic_helper_update_plane,
.disable_plane = drm_atomic_helper_disable_plane,
.reset = drm_atomic_helper_plane_reset,
.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
.atomic_duplicate_state = virtio_gpu_plane_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
};
@@ -139,11 +156,13 @@ static void virtio_gpu_resource_flush(struct drm_plane *plane,
struct drm_device *dev = plane->dev;
struct virtio_gpu_device *vgdev = dev->dev_private;
struct virtio_gpu_framebuffer *vgfb;
struct virtio_gpu_plane_state *vgplane_st;
struct virtio_gpu_object *bo;
vgfb = to_virtio_gpu_framebuffer(plane->state->fb);
vgplane_st = to_virtio_gpu_plane_state(plane->state);
bo = gem_to_virtio_gpu_obj(vgfb->base.obj[0]);
if (vgfb->fence) {
if (vgplane_st->fence) {
struct virtio_gpu_object_array *objs;
objs = virtio_gpu_array_alloc(1);
@@ -152,13 +171,11 @@ static void virtio_gpu_resource_flush(struct drm_plane *plane,
virtio_gpu_array_add_obj(objs, vgfb->base.obj[0]);
virtio_gpu_array_lock_resv(objs);
virtio_gpu_cmd_resource_flush(vgdev, bo->hw_res_handle, x, y,
width, height, objs, vgfb->fence);
width, height, objs,
vgplane_st->fence);
virtio_gpu_notify(vgdev);
dma_fence_wait_timeout(&vgfb->fence->f, true,
dma_fence_wait_timeout(&vgplane_st->fence->f, true,
msecs_to_jiffies(50));
dma_fence_put(&vgfb->fence->f);
vgfb->fence = NULL;
} else {
virtio_gpu_cmd_resource_flush(vgdev, bo->hw_res_handle, x, y,
width, height, NULL, NULL);
@@ -248,12 +265,14 @@ static int virtio_gpu_plane_prepare_fb(struct drm_plane *plane,
struct drm_device *dev = plane->dev;
struct virtio_gpu_device *vgdev = dev->dev_private;
struct virtio_gpu_framebuffer *vgfb;
struct virtio_gpu_plane_state *vgplane_st;
struct virtio_gpu_object *bo;
if (!new_state->fb)
return 0;
vgfb = to_virtio_gpu_framebuffer(new_state->fb);
vgplane_st = to_virtio_gpu_plane_state(new_state);
bo = gem_to_virtio_gpu_obj(vgfb->base.obj[0]);
drm_gem_plane_helper_prepare_fb(plane, new_state);
@@ -261,10 +280,11 @@ static int virtio_gpu_plane_prepare_fb(struct drm_plane *plane,
if (!bo || (plane->type == DRM_PLANE_TYPE_PRIMARY && !bo->guest_blob))
return 0;
if (bo->dumb && (plane->state->fb != new_state->fb)) {
vgfb->fence = virtio_gpu_fence_alloc(vgdev, vgdev->fence_drv.context,
if (bo->dumb) {
vgplane_st->fence = virtio_gpu_fence_alloc(vgdev,
vgdev->fence_drv.context,
0);
if (!vgfb->fence)
if (!vgplane_st->fence)
return -ENOMEM;
}
@@ -274,15 +294,15 @@ static int virtio_gpu_plane_prepare_fb(struct drm_plane *plane,
static void virtio_gpu_plane_cleanup_fb(struct drm_plane *plane,
struct drm_plane_state *state)
{
struct virtio_gpu_framebuffer *vgfb;
struct virtio_gpu_plane_state *vgplane_st;
if (!state->fb)
return;
vgfb = to_virtio_gpu_framebuffer(state->fb);
if (vgfb->fence) {
dma_fence_put(&vgfb->fence->f);
vgfb->fence = NULL;
vgplane_st = to_virtio_gpu_plane_state(state);
if (vgplane_st->fence) {
dma_fence_put(&vgplane_st->fence->f);
vgplane_st->fence = NULL;
}
}
@@ -295,6 +315,7 @@ static void virtio_gpu_cursor_plane_update(struct drm_plane *plane,
struct virtio_gpu_device *vgdev = dev->dev_private;
struct virtio_gpu_output *output = NULL;
struct virtio_gpu_framebuffer *vgfb;
struct virtio_gpu_plane_state *vgplane_st;
struct virtio_gpu_object *bo = NULL;
uint32_t handle;
@@ -307,6 +328,7 @@ static void virtio_gpu_cursor_plane_update(struct drm_plane *plane,
if (plane->state->fb) {
vgfb = to_virtio_gpu_framebuffer(plane->state->fb);
vgplane_st = to_virtio_gpu_plane_state(plane->state);
bo = gem_to_virtio_gpu_obj(vgfb->base.obj[0]);
handle = bo->hw_res_handle;
} else {
@@ -326,11 +348,9 @@ static void virtio_gpu_cursor_plane_update(struct drm_plane *plane,
(vgdev, 0,
plane->state->crtc_w,
plane->state->crtc_h,
0, 0, objs, vgfb->fence);
0, 0, objs, vgplane_st->fence);
virtio_gpu_notify(vgdev);
dma_fence_wait(&vgfb->fence->f, true);
dma_fence_put(&vgfb->fence->f);
vgfb->fence = NULL;
dma_fence_wait(&vgplane_st->fence->f, true);
}
if (plane->state->fb != old_state->fb) {