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gpu: host1x: Always return syncpoint value when waiting

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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.

JIRA LS-128

Change-Id: I9bcb19e71cef30175994447d5409b621b5e58a07
Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2653094
Tested-by: Jonathan Hunter <jonathanh@nvidia.com>
Reviewed-by: Jonathan Hunter <jonathanh@nvidia.com>
Reviewed-by: svc_kernel_abi <svc_kernel_abi@nvidia.com>
GVS: Gerrit_Virtual_Submit
This commit is contained in:
Mikko Perttunen
2021-09-03 11:45:05 +03:00
committed by Laxman Dewangan
parent 45652ce93f
commit 6adab12fb1
1 changed files with 2 additions and 17 deletions
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19
drivers/gpu/host1x/syncpt.c
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@@ -225,27 +225,12 @@ int host1x_syncpt_wait(struct host1x_syncpt *sp, u32 thresh, long timeout,
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;