video: tegra: host: Introduce a function ptr

This patch introduces a function pointer inside nvhost
device data structure, which can later be filled by
appropriate function address from nvgpu module, which
is going to be dynamically loaded.

Bug 1476801

Change-Id: I56541c488a116427d666d29fb5b4eba10652711a
Signed-off-by: Yogesh Bhosale <ybhosale@nvidia.com>
Reviewed-on: http://git-master/r/779457
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/include/linux/nvhost.h b/include/linux/nvhost.h
index 7a9025854..c96ad2df3 100644
--- a/include/linux/nvhost.h
+++ b/include/linux/nvhost.h
@@ -321,6 +321,10 @@ struct nvhost_device_data {
 
         /* reset control for this device */
         struct reset_control *reset_control;
+
+        /* For loadable nvgpu module, we dynamically assign function
+         * pointer of gk20a_debug_dump_device once the module loads */
+        void (*debug_dump_device)(struct platform_device *pdev);
 };
 
 
@@ -342,6 +346,11 @@ struct nvhost_device_power_attr {
         struct kobj_attribute power_attr[NVHOST_POWER_SYSFS_ATTRIB_MAX];
 };
 
+void nvhost_register_dump_device(
+                struct platform_device *dev,
+                void (*nvgpu_debug_dump_device)(struct platform_device *));
+void nvhost_unregister_dump_device(struct platform_device *dev);
+
 void host1x_writel(struct platform_device *dev, u32 r, u32 v);
 u32 host1x_readl(struct platform_device *dev, u32 r);