When the Guest and Host are using Blob resources, there is a chance
that they may use the underlying storage associated with a Blob at
the same time leading to glitches such as flickering or tearing.
To prevent these from happening, the Host needs to ensure that it
waits until its Blit is completed by the Host GPU before returning
control back to the Guest from resource_flush().

This should be the default behavior regardless of the type of Guest
that is using Blob resources but would be particularly useful for 
Guests that are using frontbuffer rendering such as Linux with X
or Windows 10, etc.

Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Dongwon Kim <dongwon.kim@intel.com>
Cc: Tina Zhang <tina.zhang@intel.com>

Vivek Kasireddy (5):
  ui/gtk: Create a common release_dmabuf helper
  ui: Add a helper to wait on a dmabuf sync object
  ui/egl: Add egl helpers to help with synchronization
  ui: Create sync objects only for blobs
  virtio-gpu: Make resource_flush wait on the sync object for blobs

 hw/display/virtio-gpu-udmabuf.c | 30 ++++++++++++++++++++++
 hw/display/virtio-gpu.c         |  1 +
 include/hw/virtio/virtio-gpu.h  |  2 ++
 include/ui/console.h            |  8 ++++++
 include/ui/egl-helpers.h        |  4 +++
 include/ui/gtk.h                |  2 --
 ui/console.c                    | 10 ++++++++
 ui/egl-helpers.c                | 44 +++++++++++++++++++++++++++++++++
 ui/gtk-egl.c                    | 18 ++++++++------
 ui/gtk-gl-area.c                |  8 ++++++
 ui/gtk.c                        | 26 ++++++++++++++++++-
 11 files changed, 142 insertions(+), 11 deletions(-)

-- 
2.30.2

Patchew URL: https://patchew.org/QEMU/20210607232530.454435-1-vivek.kasireddy@intel.com/



Hi,

This series seems to have some coding style problems. See output below for
more information:

Type: series
Message-id: 20210607232530.454435-1-vivek.kasireddy@intel.com
Subject: [PATCH v1 0/5] virtio-gpu: Add implicit (and default) sync mechanism for blobs

=== TEST SCRIPT BEGIN ===
#!/bin/bash
git rev-parse base > /dev/null || exit 0
git config --local diff.renamelimit 0
git config --local diff.renames True
git config --local diff.algorithm histogram
./scripts/checkpatch.pl --mailback base..
=== TEST SCRIPT END ===

Updating 3c8cf5a9c21ff8782164d1def7f44bd888713384
Switched to a new branch 'test'
255bbee virtio-gpu: Make resource_flush wait on the sync object for blobs
60d80bd ui: Create sync objects only for blobs
fd4c503 ui/egl: Add egl helpers to help with synchronization
faed37e ui: Add a helper to wait on a dmabuf sync object
9f9a6c6 ui/gtk: Create a common release_dmabuf helper

=== OUTPUT BEGIN ===
1/5 Checking commit 9f9a6c6c4593 (ui/gtk: Create a common release_dmabuf helper)
2/5 Checking commit faed37ec89dc (ui: Add a helper to wait on a dmabuf sync object)
3/5 Checking commit fd4c50392fa3 (ui/egl: Add egl helpers to help with synchronization)
ERROR: code indent should never use tabs
#64: FILE: ui/egl-helpers.c:88:
+^I^I^I^IEGL_SYNC_NATIVE_FENCE_ANDROID, NULL);$

total: 1 errors, 0 warnings, 100 lines checked

Patch 3/5 has style problems, please review.  If any of these errors
are false positives report them to the maintainer, see
CHECKPATCH in MAINTAINERS.

4/5 Checking commit 60d80bd36f23 (ui: Create sync objects only for blobs)
5/5 Checking commit 255bbee81de3 (virtio-gpu: Make resource_flush wait on the sync object for blobs)
=== OUTPUT END ===

Test command exited with code: 1


The full log is available at
http://patchew.org/logs/20210607232530.454435-1-vivek.kasireddy@intel.com/testing.checkpatch/?type=message.
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