Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 33 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/display/intel_modeset_lock.h b/drivers/gpu/drm/i915/display/intel_modeset_lock.h
new file mode 100644
index 0000000000..edb5099bcd
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_modeset_lock.h
@@ -0,0 +1,33 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2023 Intel Corporation
+ */
+
+#ifndef __INTEL_MODESET_LOCK_H__
+#define __INTEL_MODESET_LOCK_H__
+
+#include <linux/types.h>
+
+struct drm_modeset_acquire_ctx;
+struct intel_atomic_state;
+
+void _intel_modeset_lock_begin(struct drm_modeset_acquire_ctx *ctx,
+			       struct intel_atomic_state *state,
+			       unsigned int flags,
+			       int *ret);
+bool _intel_modeset_lock_loop(int *ret);
+void _intel_modeset_lock_end(struct drm_modeset_acquire_ctx *ctx,
+			     struct intel_atomic_state *state,
+			     int *ret);
+
+/*
+ * Note that one must always use "continue" rather than
+ * "break" or "return" to handle errors within the
+ * intel_modeset_lock_ctx_retry() block.
+ */
+#define intel_modeset_lock_ctx_retry(ctx, state, flags, ret) \
+	for (_intel_modeset_lock_begin((ctx), (state), (flags), &(ret)); \
+	     _intel_modeset_lock_loop(&(ret)); \
+	     _intel_modeset_lock_end((ctx), (state), &(ret)))
+
+#endif /* __INTEL_MODESET_LOCK_H__ */