[igt-dev] [PATCH i-g-t v2] lib/igt_debugfs: Add IGT_CRC_SOURCE environmental variable

[Jessica Zhang]

Adds support for the IGT_CRC_SOURCE environmental variable to make it
easier for drivers to run tests using custom CRC sources.

Example usage:
	`IGT_CRC_SOURCE=intf ./kms_pipe_crc_basic`

If the IGT_CRC_SOURCE isn't set, use the original source that was passed
in as a parameter to pipe_crc_new().

Signed-off-by: Jessica Zhang <quic_jesszhan at quicinc.com>
---
 lib/igt_debugfs.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/lib/igt_debugfs.c b/lib/igt_debugfs.c
index 7e7ccf22c455..f9404acc3942 100644
--- a/lib/igt_debugfs.c
+++ b/lib/igt_debugfs.c
@@ -719,9 +719,15 @@ pipe_crc_new(int fd, enum pipe pipe, const char *source, int flags)
 	igt_pipe_crc_t *pipe_crc;
 	char buf[128];
 	int debugfs;
+	char *env_source;
 
 	igt_assert(source);
 
+	env_source = getenv("IGT_CRC_SOURCE");
+
+	if (!env_source)
+		env_source = source;
+
 	debugfs = igt_debugfs_dir(fd);
 	igt_assert(debugfs != -1);
 
@@ -736,7 +742,7 @@ pipe_crc_new(int fd, enum pipe pipe, const char *source, int flags)
 	pipe_crc->fd = fd;
 	pipe_crc->dir = debugfs;
 	pipe_crc->pipe = pipe;
-	pipe_crc->source = strdup(source);
+	pipe_crc->source = strdup(env_source);
 	igt_assert(pipe_crc->source);
 	pipe_crc->flags = flags;
 
-- 
2.31.0