broadcom/vc4: Native fence fd support

With the syncobj support in place, lets use it to implement the
EGL_ANDROID_native_fence_sync extension. This mostly follows previous
implementations in freedreno and etnaviv.

v2: Drop the flags (Eric)
    Handle in_fence_fd already in job_submit (Eric)
    Drop extra vc4_fence_context_init (Eric)
    Dup fds with CLOEXEC (Eric)
    Mention exact extension name (Eric)

Signed-off-by: Stefan Schake <[email protected]>
Reviewed-by: Eric Anholt <[email protected]>

1 files changed, 11 insertions, 1 deletions

diff --git a/src/gallium/drivers/vc4/vc4_job.c b/src/gallium/drivers/vc4/vc4_job.c
index 3b0ba8b69cf..72569765847 100644
--- a/src/gallium/drivers/vc4/vc4_job.c
+++ b/src/gallium/drivers/vc4/vc4_job.c
@@ -477,9 +477,19 @@ vc4_job_submit(struct vc4_context *vc4, struct vc4_job *job)
         }
         submit.flags |= job->flags;
 
-        if (vc4->screen->has_syncobj)
+        if (vc4->screen->has_syncobj) {
                 submit.out_sync = vc4->job_syncobj;
 
+                if (vc4->in_fence_fd >= 0) {
+                        /* This replaces the fence in the syncobj. */
+                        drmSyncobjImportSyncFile(vc4->fd, vc4->in_syncobj,
+                                                 vc4->in_fence_fd);
+                        submit.in_sync = vc4->in_syncobj;
+                        close(vc4->in_fence_fd);
+                        vc4->in_fence_fd = -1;
+                }
+        }
+
         if (!(vc4_debug & VC4_DEBUG_NORAST)) {
                 int ret;