From a49906e26616c405d41631d5e1b0be0a366d2c30 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Wed, 11 Jun 2014 19:21:27 +0300 Subject: [PATCH] lib/igt_debufs: Add IGT_NO_FORCEWAKE environment variable MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 --- lib/igt_debugfs.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/lib/igt_debugfs.c b/lib/igt_debugfs.c index 809d447b..2f655a1d 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); }