diff mbox series

[5.15,034/139] gpu: host1x: Always return syncpoint value when waiting

Message ID 20220228172351.358052186@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg KH Feb. 28, 2022, 5:23 p.m. UTC 
From: Mikko Perttunen <mperttunen@nvidia.com>

commit 184b58fa816fb5ee1854daf0d430766422bf2a77 upstream.

The new TegraDRM UAPI uses syncpoint waiting with timeout set to
zero to indicate reading the syncpoint value. To support that we
need to return the syncpoint value always when waiting.

Fixes: 44e961381354 ("drm/tegra: Implement syncpoint wait UAPI")
Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/gpu/host1x/syncpt.c |   19 ++-----------------
 1 file changed, 2 insertions(+), 17 deletions(-)
diff mbox series

Patch

--- a/drivers/gpu/host1x/syncpt.c
+++ b/drivers/gpu/host1x/syncpt.c
@@ -225,27 +225,12 @@  int host1x_syncpt_wait(struct host1x_syn
 	void *ref;
 	struct host1x_waitlist *waiter;
 	int err = 0, check_count = 0;
-	u32 val;
 
 	if (value)
-		*value = 0;
-
-	/* first check cache */
-	if (host1x_syncpt_is_expired(sp, thresh)) {
-		if (value)
-			*value = host1x_syncpt_load(sp);
+		*value = host1x_syncpt_load(sp);
 
+	if (host1x_syncpt_is_expired(sp, thresh))
 		return 0;
-	}
-
-	/* try to read from register */
-	val = host1x_hw_syncpt_load(sp->host, sp);
-	if (host1x_syncpt_is_expired(sp, thresh)) {
-		if (value)
-			*value = val;
-
-		goto done;
-	}
 
 	if (!timeout) {
 		err = -EAGAIN;