commit 9e397956b092543f5fc89ccc43dc309818c150c6
author Icenowy Zheng <icenowy@aosc.io> Thu Aug 06 04:48:05 2020 +0800
committer Marge Bot <eric+marge@anholt.net> Thu Aug 06 13:16:25 2020 +0000
tree 691a9731aa5f3bba46e9482be06603d57f713901
parent c6aadbae71562c14166a6e7942867eaf56b3e017

panfrost: signal syncobj if nothing is going to be flushed

When nothing is going to be flushed, the kernel will get no job that
signals the syncobj.

Signal it by ourselves, otherwise it will never get signaled.

Closes: #3371

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Cc: mesa-stable
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6190>

src/gallium/drivers/panfrost/pan_job.c

diff --git a/src/gallium/drivers/panfrost/pan_job.c b/src/gallium/drivers/panfrost/pan_job.c
index 3295d84..d59aa22 100644
--- a/src/gallium/drivers/panfrost/pan_job.c
+++ b/src/gallium/drivers/panfrost/pan_job.c
@@ -1076,8 +1076,11 @@
         int ret;
 
         /* Nothing to do! */
-        if (!batch->scoreboard.first_job && !batch->clear)
+        if (!batch->scoreboard.first_job && !batch->clear) {
+                if (out_sync)
+                        drmSyncobjSignal(dev->fd, &out_sync, 1);
                 goto out;
+	}
 
         panfrost_batch_draw_wallpaper(batch);