Add --debug as a common command line option for all tests to enable
debug output.

Signed-off-by: Thomas Wood <thomas.w...@intel.com>
---
 lib/igt_core.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/lib/igt_core.c b/lib/igt_core.c
index 42b22fc..d90e6bb 100644
--- a/lib/igt_core.c
+++ b/lib/igt_core.c
@@ -276,7 +276,9 @@ static void print_usage(const char *command_str, const char 
*help_str,
 
        fprintf(f, "Usage: %s [OPTIONS]\n"
                   "  --list-subtests\n"
-                  "  --run-subtest <pattern>\n", command_str);
+                  "  --run-subtest <pattern>\n"
+                  "  --debug\n"
+                  "  --help\n", command_str);
        if (help_str)
                fprintf(f, "%s\n", help_str);
 }
@@ -301,6 +303,7 @@ static int common_init(int argc, char **argv,
        static struct option long_options[] = {
                {"list-subtests", 0, 0, 'l'},
                {"run-subtest", 1, 0, 'r'},
+               {"debug", 0, 0, 'd'},
                {"help", 0, 0, 'h'},
        };
        const char *command_str;
@@ -349,6 +352,9 @@ static int common_init(int argc, char **argv,
        while ((c = getopt_long(argc, argv, short_opts, combined_opts,
                               &option_index)) != -1) {
                switch(c) {
+               case 'd':
+                       igt_log_level = IGT_LOG_DEBUG;
+                       break;
                case 'l':
                        if (!run_single_subtest)
                                list_subtests = true;
-- 
1.9.3

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