[PATCH v4 3/5] lib: Add platform filter initialization check for automatic filtering

From: Vitaly Prosyak <[email protected]>

Provide igt_platform_filter_is_initialized() helper function to allow
the IGT core to check if platform filtering has been enabled for the
current test before attempting automatic filtering.

This enables the __igt_run_subtest() hook (in next commit) to
conditionally apply platform filtering only when tests have opted in
via platform_filter_init().

Without this check, tests that haven't called platform_filter_init()
would fail when the framework tries to call igt_platform_should_skip().

v3 changes:
 - This is now patch 3/6 (was 4/7 in v2) due to squashing of patches 1+2
   per Kamil Konieczny's review feedback
 - No code changes from v2

Cc: Kamil Konieczny <[email protected]>
Cc: Jani Nikula <[email protected]>
Cc: Jesse Zhang <[email protected]>
Cc: Christian König <[email protected]>
Cc: Alex Deucher <[email protected]>
Signed-off-by: Vitaly Prosyak <[email protected]>
Reviewed-by: Krzysztof Karas <[email protected]>
Change-Id: I1f8d7c1b76d8a2e3d5f6c4b9e0a7d8e9f0a1b2c3
---
 lib/igt_platform_filter.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/igt_platform_filter.h b/lib/igt_platform_filter.h
index d64450489..b4639e610 100644
--- a/lib/igt_platform_filter.h
+++ b/lib/igt_platform_filter.h
@@ -119,4 +119,6 @@ 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