linux-stable.git/drivers/gpu/drm/virtio/virtgpu_plane.c, branch v5.7

drm/virtio: batch plane updates (pageflip)

2020-02-17T13:50:49+00:00

Move virtio_gpu_notify() to higher-level functions for
virtio_gpu_cmd_resource_flush(), virtio_gpu_cmd_set_scanout() and
virtio_gpu_cmd_transfer_to_host_{2d,3d}().

virtio_gpu_primary_plane_update() will notify only once for a series
of commands (restores plane update command batching).

Signed-off-by: Gerd Hoffmann 
Reviewed-by: Chia-I Wu 
Reviewed-by: Gurchetan Singh 
Link: http://patchwork.freedesktop.org/patch/msgid/20200214125535.26349-4-kraxel@redhat.com

drm/virtio: rework notification for better batching

2020-02-17T13:50:48+00:00

Drop the virtio_gpu_{disable,enable}_notify().  Add a new
virtio_gpu_notify() call instead, which must be called whenever
the driver wants make sure the host is notified needed.

Drop automatic notification from command submission.  Add
virtio_gpu_notify() calls after each command query instead.
This allows more fine-grained control over host notification
and can move around the notify calls in subsequent patches to
batch command submissions. With this in place it is also
possible to make notification optional for userspace ioctls.

Page flip batching goes away (temporarely).

v3:
 - move batching to separate patches.
v2:
 - rebase to latest drm-misc-next.
 - use "if (!atomic_read())".
 - add review & test tags.

Signed-off-by: Gerd Hoffmann 
Reviewed-by: Gurchetan Singh 
Tested-by: Gurchetan Singh 
Reviewed-by: Chia-I Wu 
Link: http://patchwork.freedesktop.org/patch/msgid/20200214125535.26349-2-kraxel@redhat.com

drm/virtio: fix virtio_gpu_cursor_plane_update().

2020-02-13T10:11:59+00:00

Add missing virtio_gpu_array_lock_resv() call.

Signed-off-by: Gerd Hoffmann 
Reviewed-by: Chia-I Wu 
Link: http://patchwork.freedesktop.org/patch/msgid/20200211135047.22261-3-kraxel@redhat.com

drm/virtio: use damage info for display updates.

2019-12-16T11:39:50+00:00

v2: remove shift by src_{x,y}, drm_atomic_helper_damage_merged()
    handles that for us (Chia-I Wu).

Signed-off-by: Gerd Hoffmann 
Reviewed-by: Chia-I Wu 
Link: http://patchwork.freedesktop.org/patch/msgid/20191212125346.8334-4-kraxel@redhat.com

drm/virtio: batch display update commands.

2019-12-16T11:39:50+00:00

When the driver submits multiple commands in a row it makes sense to
notify the host only after submitting the last one, so the host can
process them all at once, with a single vmexit.

Add functions to enable/disable notifications to allow that.  Use the
new functions for primary plane updates.

Signed-off-by: Gerd Hoffmann 
Reviewed-by: Chia-I Wu 
Link: http://patchwork.freedesktop.org/patch/msgid/20191212125346.8334-3-kraxel@redhat.com

drm/virtio: skip set_scanout if framebuffer didn't change

2019-12-16T11:39:50+00:00

v2: also check src rect (Chia-I Wu).

Signed-off-by: Gerd Hoffmann 
Reviewed-by: Chia-I Wu 
Link: http://patchwork.freedesktop.org/patch/msgid/20191212125346.8334-2-kraxel@redhat.com

drm/virtio: plane_state->fb iff plane_state->crtc

2019-12-16T11:39:50+00:00

Checking both is one too much, so wrap a WARN_ON around it to stope
the copypasta.

Signed-off-by: Daniel Vetter 
Link: http://patchwork.freedesktop.org/patch/msgid/20191213172612.1514842-8-daniel.vetter@ffwll.ch
Cc: David Airlie 
Cc: Gerd Hoffmann 
Cc: virtualization@lists.linux-foundation.org
Signed-off-by: Gerd Hoffmann

drm/virtio: factor out virtio_gpu_update_dumb_bo

2019-11-20T08:22:27+00:00

No functional change.

Signed-off-by: Gerd Hoffmann 
Reviewed-by: Gurchetan Singh 
Link: http://patchwork.freedesktop.org/patch/msgid/20191023062539.11728-4-kraxel@redhat.com

drm/virtio: Simplify virtio_gpu_primary_plane_update workflow.

2019-11-20T08:22:27+00:00

Return early for the no framebuffer (or disabled output) case.
Results in a simpler code flow for the remaining cases.
No functional change.

Signed-off-by: Gerd Hoffmann 
Reviewed-by: Gurchetan Singh 
Link: http://patchwork.freedesktop.org/patch/msgid/20191023062539.11728-3-kraxel@redhat.com

drm/virtio: move byteorder handling into virtio_gpu_cmd_transfer_to_host_2d function

2019-10-22T09:34:03+00:00

Be consistent with the rest of the code base.

Signed-off-by: Gerd Hoffmann 
Reviewed-by: Daniel Vetter 
Link: http://patchwork.freedesktop.org/patch/msgid/20191018122352.17019-1-kraxel@redhat.com