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| author | Mikko Perttunen <mperttunen@nvidia.com> | 2017-09-28 14:50:39 +0200 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2017-10-20 14:19:52 +0200 |
| commit | c3f52220f276504dea5615cc78750ddc9f468389 (patch) | |
| tree | 678205dfba02670263243686112a7da609fc2e5c /drivers/gpu/host1x/syncpt.c | |
| parent | gpu: host1x: Call of_dma_configure() after setting bus (diff) | |
| download | linux-c3f52220f276504dea5615cc78750ddc9f468389.tar.xz linux-c3f52220f276504dea5615cc78750ddc9f468389.zip | |
gpu: host1x: Enable Tegra186 syncpoint protection
Since Tegra186 the Host1x hardware allows syncpoints to be assigned to
specific channels, preventing any other channels from incrementing
them.
Enable this feature where available and assign syncpoints to channels
when submitting a job. Syncpoints are currently never unassigned from
channels since that would require extra work and is unnecessary with
the current channel allocation model.
Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'drivers/gpu/host1x/syncpt.c')
| -rw-r--r-- | drivers/gpu/host1x/syncpt.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/gpu/host1x/syncpt.c b/drivers/gpu/host1x/syncpt.c index fcba94cbf4ed..a2a952adc136 100644 --- a/drivers/gpu/host1x/syncpt.c +++ b/drivers/gpu/host1x/syncpt.c @@ -398,6 +398,13 @@ int host1x_syncpt_init(struct host1x *host) for (i = 0; i < host->info->nb_pts; i++) { syncpt[i].id = i; syncpt[i].host = host; + + /* + * Unassign syncpt from channels for purposes of Tegra186 + * syncpoint protection. This prevents any channel from + * accessing it until it is reassigned. + */ + host1x_hw_syncpt_assign_to_channel(host, &syncpt[i], NULL); } for (i = 0; i < host->info->nb_bases; i++) @@ -408,6 +415,7 @@ int host1x_syncpt_init(struct host1x *host) host->bases = bases; host1x_syncpt_restore(host); + host1x_hw_syncpt_enable_protection(host); /* Allocate sync point to use for clearing waits for expired fences */ host->nop_sp = host1x_syncpt_alloc(host, NULL, 0); |