From e30e21ebd14a925931d70ee77a7488712a3a86d9 Mon Sep 17 00:00:00 2001
From: Laxman Dewangan <ldewangan@nvidia.com>
Date: Sat, 30 Dec 2023 07:23:00 +0000
Subject: [PATCH] v4l2: Add conftest for v4l2 API changes in Linux 6.6

Add conftest to determine the API changes/deprecation
for V4L2 in Linux6.6. The changes are:
  The device argument is added in the API v4l2_async_nf_init() with
  commit b8ec754ae4c5 ("media: v4l: async: Set v4l2_device and subdev
  in async notifier init") in Linux 6.6.

  The API is removed with commit bda8953e8c3e ("media: v4l: async: Drop
  v4l2_async_nf_parse_fwnode_endpoints()") in Linux 6.6

Bug 4346767

Change-Id: Ia225be8b4fb17003ec2899e872573dc05e9fde87
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3042900
(cherry picked from commit 8df8cfc8e66e923ca7e5d119a893f5e54e449975)
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3055495
Tested-by: Jonathan Hunter <jonathanh@nvidia.com>
Reviewed-by: Paritosh Dixit <paritoshd@nvidia.com>
Reviewed-by: Jonathan Hunter <jonathanh@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
---
 scripts/conftest/Makefile    |  2 ++
 scripts/conftest/conftest.sh | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 35 insertions(+)

diff --git a/scripts/conftest/Makefile b/scripts/conftest/Makefile
index 5c9763ae..3ba8e506 100644
--- a/scripts/conftest/Makefile
+++ b/scripts/conftest/Makefile
@@ -159,6 +159,8 @@ NV_CONFTEST_FUNCTION_COMPILE_TESTS += v4l2_async_connection_struct_present
 NV_CONFTEST_FUNCTION_COMPILE_TESTS += v4l2_async_match_type_enum_present
 NV_CONFTEST_FUNCTION_COMPILE_TESTS += v4l2_async_subdev_nf_init
 NV_CONFTEST_FUNCTION_COMPILE_TESTS += v4l2_async_notifier_init
+NV_CONFTEST_FUNCTION_COMPILE_TESTS += v4l2_async_nf_init_has_v4l2_dev_arg
+NV_CONFTEST_FUNCTION_COMPILE_TESTS += __v4l2_async_nf_add_subdev
 NV_CONFTEST_FUNCTION_COMPILE_TESTS += v4l2_subdev_pad_ops_struct_has_get_frame_interval
 NV_CONFTEST_FUNCTION_COMPILE_TESTS += vm_area_struct_has_const_vm_flags
 NV_CONFTEST_GENERIC_COMPILE_TESTS += is_export_symbol_present_drm_gem_prime_fd_to_handle
diff --git a/scripts/conftest/conftest.sh b/scripts/conftest/conftest.sh
index ebd6637c..90437ade 100755
--- a/scripts/conftest/conftest.sh
+++ b/scripts/conftest/conftest.sh
@@ -7638,6 +7638,39 @@ compile_test() {
             compile_check_conftest "$CODE" "NV_V4L2_ASYNC_NOTIFIER_INIT_PRESENT" "" "functions"
         ;;
 
+        v4l2_async_nf_init_has_v4l2_dev_arg)
+            #
+            # Determine if the function v4l2_async_nf_init() has v4l2_dev argument or not.
+            #
+            # The device argument is added in the API v4l2_async_nf_init() with commit
+            # b8ec754ae4c5 ("media: v4l: async: Set v4l2_device and subdev in async notifier init")
+            # in Linux 6.6.
+            #
+            CODE="
+            #include <media/v4l2-async.h>
+            void conftest_v4l2_async_nf_init_has_v4l2_dev_arg(void) {
+                v4l2_async_nf_init(NULL, NULL);
+            }"
+
+            compile_check_conftest "$CODE" "NV_V4L2_ASYNC_NF_INIT_HAS_V4L2_DEV_ARG" "" "types"
+        ;;
+
+        __v4l2_async_nf_add_subdev)
+            #
+            # Determine if the function __v4l2_async_nf_add_subdev() present or not.
+            #
+            # The API is removed with commit bda8953e8c3e ("media: v4l: async: Drop
+            # v4l2_async_nf_parse_fwnode_endpoints()") in Linux 6.6
+            #
+            CODE="
+            #include <media/v4l2-async.h>
+            void conftest_v4l2_async_nf_add_subdev_present(void) {
+                __v4l2_async_nf_add_subdev();
+            }"
+
+            compile_check_conftest "$CODE" "NV_V4L2_ASYNC_NF_ADD_SUBDEV_PRESENT" "" "functions"
+        ;;
+
         v4l2_subdev_pad_ops_struct_has_get_frame_interval)
             #
             # Determine if struct v4l2_subdev_pad_ops has the 'get_frame_interval'