1 files changed, 57 insertions, 0 deletions
diff --git a/drivers/gpu/drm/ci/check-patch.py b/drivers/gpu/drm/ci/check-patch.py
new file mode 100755
index 000000000000..a5f399a20e25
--- /dev/null
+++ b/drivers/gpu/drm/ci/check-patch.py
@@ -0,0 +1,57 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: GPL-2.0-or-later
+#
+# check-patch.py: run checkpatch.pl across all commits in a branch
+#
+# Based on qemu/.gitlab-ci.d/check-patch.py
+#
+# Copyright (C) 2020 Red Hat, Inc.
+# Copyright (C) 2022 Collabora Ltd.
+
+import os
+import os.path
+import sys
+import subprocess
+
+repourl = "https://gitlab.freedesktop.org/%s.git" % os.environ["CI_MERGE_REQUEST_PROJECT_PATH"]
+
+# GitLab CI environment does not give us any direct info about the
+# base for the user's branch. We thus need to figure out a common
+# ancestor between the user's branch and current git master.
+os.environ["GIT_DEPTH"] = "1000"
+subprocess.call(["git", "remote", "remove", "check-patch"], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
+subprocess.check_call(["git", "remote", "add", "check-patch", repourl])
+subprocess.check_call(["git", "fetch", "check-patch", os.environ["CI_MERGE_REQUEST_TARGET_BRANCH_NAME"]],
+                      stdout=subprocess.DEVNULL,
+                      stderr=subprocess.DEVNULL)
+
+ancestor = subprocess.check_output(["git", "merge-base",
+                                    "check-patch/%s" % os.environ["CI_MERGE_REQUEST_TARGET_BRANCH_NAME"], "HEAD"],
+                                   universal_newlines=True)
+
+ancestor = ancestor.strip()
+
+log = subprocess.check_output(["git", "log", "--format=%H %s",
+                               ancestor + "..."],
+                              universal_newlines=True)
+
+subprocess.check_call(["git", "remote", "rm", "check-patch"])
+
+if log == "":
+    print("\nNo commits since %s, skipping checks\n" % ancestor)
+    sys.exit(0)
+
+errors = False
+
+print("\nChecking all commits since %s...\n" % ancestor, flush=True)
+
+ret = subprocess.run(["scripts/checkpatch.pl",
+                      "--terse",
+                      "--types", os.environ["CHECKPATCH_TYPES"],
+                      "--git", ancestor + "..."])
+
+if ret.returncode != 0:
+    print("    ❌ FAIL one or more commits failed scripts/checkpatch.pl")
+    sys.exit(1)
+
+sys.exit(0)