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path: root/drivers/gpu/host1x/hw/syncpt_hw.c
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Diffstat (limited to 'drivers/gpu/host1x/hw/syncpt_hw.c')
-rw-r--r--drivers/gpu/host1x/hw/syncpt_hw.c46
1 files changed, 46 insertions, 0 deletions
diff --git a/drivers/gpu/host1x/hw/syncpt_hw.c b/drivers/gpu/host1x/hw/syncpt_hw.c
index 7b0270d60742..7dfd47d74f89 100644
--- a/drivers/gpu/host1x/hw/syncpt_hw.c
+++ b/drivers/gpu/host1x/hw/syncpt_hw.c
@@ -106,6 +106,50 @@ static int syncpt_patch_wait(struct host1x_syncpt *sp, void *patch_addr)
return 0;
}
+/**
+ * syncpt_assign_to_channel() - Assign syncpoint to channel
+ * @sp: syncpoint
+ * @ch: channel
+ *
+ * On chips with the syncpoint protection feature (Tegra186+), assign @sp to
+ * @ch, preventing other channels from incrementing the syncpoints. If @ch is
+ * NULL, unassigns the syncpoint.
+ *
+ * On older chips, do nothing.
+ */
+static void syncpt_assign_to_channel(struct host1x_syncpt *sp,
+ struct host1x_channel *ch)
+{
+#if HOST1X_HW >= 6
+ struct host1x *host = sp->host;
+
+ if (!host->hv_regs)
+ return;
+
+ host1x_sync_writel(host,
+ HOST1X_SYNC_SYNCPT_CH_APP_CH(ch ? ch->id : 0xff),
+ HOST1X_SYNC_SYNCPT_CH_APP(sp->id));
+#endif
+}
+
+/**
+ * syncpt_enable_protection() - Enable syncpoint protection
+ * @host: host1x instance
+ *
+ * On chips with the syncpoint protection feature (Tegra186+), enable this
+ * feature. On older chips, do nothing.
+ */
+static void syncpt_enable_protection(struct host1x *host)
+{
+#if HOST1X_HW >= 6
+ if (!host->hv_regs)
+ return;
+
+ host1x_hypervisor_writel(host, HOST1X_HV_SYNCPT_PROT_EN_CH_EN,
+ HOST1X_HV_SYNCPT_PROT_EN);
+#endif
+}
+
static const struct host1x_syncpt_ops host1x_syncpt_ops = {
.restore = syncpt_restore,
.restore_wait_base = syncpt_restore_wait_base,
@@ -113,4 +157,6 @@ static const struct host1x_syncpt_ops host1x_syncpt_ops = {
.load = syncpt_load,
.cpu_incr = syncpt_cpu_incr,
.patch_wait = syncpt_patch_wait,
+ .assign_to_channel = syncpt_assign_to_channel,
+ .enable_protection = syncpt_enable_protection,
};