From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
If IGT_NO_FORCEWAKE is set, skip the forcewake open. Useful when you
want to poke at register without otherwise disturbing the GPU.
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
lib/igt_debugfs.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/lib/igt_debugfs.c b/lib/igt_debugfs.c
index 809d447..2f655a1 100644
--- a/lib/igt_debugfs.c
+++ b/lib/igt_debugfs.c
@@ -618,6 +618,8 @@ void igt_enable_prefault(void)
*/
int igt_open_forcewake_handle(void)
{
+ if (getenv("IGT_NO_FORCEWAKE"))
+ return -1;
return igt_debugfs_open("i915_forcewake_user", O_WRONLY);
}
--
1.8.5.5
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