video: tegra: host: Syncpoint interrupt callbacks

Add a kernel interface for allocating syncpoints for the purpose of
getting callbacks when they get incremented, e.g. for synchronization
with external DMA masters.

Jira HOSTX-443

Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Change-Id: Id8532aba3c47fa312cb9fd9a82266ff84d381980
Reviewed-on: https://git-master.nvidia.com/r/2017274
Tested-by: Manikanta Maddireddy <mmaddireddy@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Manikanta Maddireddy <mmaddireddy@nvidia.com>
Reviewed-by: Vidya Sagar <vidyas@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/include/linux/nvhost_interrupt_syncpt.h b/include/linux/nvhost_interrupt_syncpt.h
new file mode 100644
index 000000000..ec258b57e
--- /dev/null
+++ b/include/linux/nvhost_interrupt_syncpt.h
@@ -0,0 +1,16 @@
+#ifndef NVHOST_INTERRUPT_SYNCPT_H
+#define NVHOST_INTERRUPT_SYNCPT_H
+
+#include <linux/of.h>
+
+struct nvhost_interrupt_syncpt;
+
+struct nvhost_interrupt_syncpt *nvhost_interrupt_syncpt_get(
+        struct device_node *np, void (*callback)(void *), void *private_data);
+u32 nvhost_interrupt_syncpt_get_syncpt_index(struct nvhost_interrupt_syncpt *is);
+phys_addr_t nvhost_interrupt_syncpt_get_syncpt_addr(
+    struct nvhost_interrupt_syncpt *is);
+void nvhost_interrupt_syncpt_free(struct nvhost_interrupt_syncpt *is);
+int nvhost_interrupt_syncpt_prime(struct nvhost_interrupt_syncpt *is);
+
+#endif