[PATCH 4/7] lib: Add platform filter initialization check for automatic filtering

[<vitaly.prosyak@amd.com>]

From: Vitaly Prosyak <vitaly.prosyak@amd.com>

Add igt_platform_filter_is_initialized() to allow the IGT framework
to check if platform filtering has been initialized.

This enables automatic platform filtering in __igt_run_subtest()
without requiring manual igt_platform_require() calls in each subtest.

The function provides a clean interface to check initialization state
without exposing internal implementation details.

Cc: Kamil Konieczny <kamil.konieczny@linux.intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Jesse Zhang <jesse.zhang@amd.com>
Cc: Christian König <christian.koenig@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Krzysztof Karas <krzysztof.karas@intel.com>
Signed-off-by: Vitaly Prosyak <vitaly.prosyak@amd.com>
---
 lib/igt_platform_filter.c | 13 +++++++++++++
 lib/igt_platform_filter.h |  2 ++
 2 files changed, 15 insertions(+)

diff --git a/lib/igt_platform_filter.c b/lib/igt_platform_filter.c
index 5e2e7c744..7ebdeb419 100644
--- a/lib/igt_platform_filter.c
+++ b/lib/igt_platform_filter.c
@@ -577,3 +577,16 @@ int igt_platform_filter_dump_to_file(const char *filename)
 
 	return 0;
 }
+
+/**
+ * igt_platform_filter_is_initialized:
+ *
+ * Check if platform filtering has been initialized.
+ *
+ * Returns: true if initialized, false otherwise
+ */
+bool igt_platform_filter_is_initialized(void)
+{
+	struct platform_filter_context *ctx = get_filter_context();
+	return ctx && ctx->initialized;
+}
diff --git a/lib/igt_platform_filter.h b/lib/igt_platform_filter.h
index e532c6de7..853da75ae 100644
--- a/lib/igt_platform_filter.h
+++ b/lib/igt_platform_filter.h
@@ -120,4 +120,6 @@ void igt_platform_filter_dump(void);
 
 int igt_platform_filter_dump_to_file(const char *filename);
 
+bool igt_platform_filter_is_initialized(void);
+
 #endif /* IGT_PLATFORM_FILTER_H */
-- 
2.54.0