[PATCH i-g-t 1/7] lib/igt_kms: don't run on unsupported platform

[Kunal Joshi]

dipslay <=12 needs dsc enabled for pipe joiner,
add a check in IGT for the same

v2: dsc is required for gen12, so test only
    for devid 13 and 13+ (Ankit)
v3: update comment (Bhanu)

Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
Cc: Ankit Nautiyal <ankit.k.nautiyal at intel.com>
Cc: Bhanuprakash Modem <bhanuprakash.modem at intel.com>
Signed-off-by: Kunal Joshi <kunal1.joshi at intel.com>
Suggested-by: Ankit Nautiyal <ankit.k.nautiyal at intel.com>
---
 lib/igt_kms.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/lib/igt_kms.c b/lib/igt_kms.c
index 3216fe7e4..ee8848079 100644
--- a/lib/igt_kms.c
+++ b/lib/igt_kms.c
@@ -6246,6 +6246,14 @@ bool igt_has_force_joiner_debugfs(int drmfd, igt_output_t *output)
 	char buf[512];
 	int debugfs_fd, ret;
 
+	/*
+	 * bigjoiner is supported on display<= 12 with DSC only
+	 * and only on Pipe A for Display 11
+	 * For simplicity avoid Display 11 and 12, check for >= 13
+	 */
+	if (intel_display_ver(intel_get_drm_devid(drmfd)) < 13)
+		return false;
+
 	igt_assert_f(output->name, "Connector name cannot be NULL\n");
 	debugfs_fd = igt_debugfs_connector_dir(drmfd, output->name, O_RDONLY);
 	if (debugfs_fd < 0)
-- 
2.25.1