1 files changed, 133 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dp_tunnel.h b/drivers/gpu/drm/i915/display/intel_dp_tunnel.h
new file mode 100644
index 000000000000..08b2cba84af2
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_dp_tunnel.h
@@ -0,0 +1,133 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2023 Intel Corporation
+ */
+
+#ifndef __INTEL_DP_TUNNEL_H__
+#define __INTEL_DP_TUNNEL_H__
+
+#include <linux/errno.h>
+#include <linux/types.h>
+
+struct drm_i915_private;
+struct drm_connector_state;
+struct drm_modeset_acquire_ctx;
+
+struct intel_atomic_state;
+struct intel_connector;
+struct intel_crtc;
+struct intel_crtc_state;
+struct intel_dp;
+struct intel_encoder;
+struct intel_link_bw_limits;
+
+#if defined(CONFIG_DRM_I915_DP_TUNNEL) && defined(I915)
+
+int intel_dp_tunnel_detect(struct intel_dp *intel_dp, struct drm_modeset_acquire_ctx *ctx);
+void intel_dp_tunnel_disconnect(struct intel_dp *intel_dp);
+void intel_dp_tunnel_destroy(struct intel_dp *intel_dp);
+void intel_dp_tunnel_resume(struct intel_dp *intel_dp,
+			    const struct intel_crtc_state *crtc_state,
+			    bool dpcd_updated);
+void intel_dp_tunnel_suspend(struct intel_dp *intel_dp);
+
+bool intel_dp_tunnel_bw_alloc_is_enabled(struct intel_dp *intel_dp);
+
+void
+intel_dp_tunnel_atomic_cleanup_inherited_state(struct intel_atomic_state *state);
+
+int intel_dp_tunnel_atomic_compute_stream_bw(struct intel_atomic_state *state,
+					     struct intel_dp *intel_dp,
+					     const struct intel_connector *connector,
+					     struct intel_crtc_state *crtc_state);
+void intel_dp_tunnel_atomic_clear_stream_bw(struct intel_atomic_state *state,
+					    struct intel_crtc_state *crtc_state);
+
+int intel_dp_tunnel_atomic_add_state_for_crtc(struct intel_atomic_state *state,
+					      struct intel_crtc *crtc);
+int intel_dp_tunnel_atomic_check_link(struct intel_atomic_state *state,
+				      struct intel_link_bw_limits *limits);
+int intel_dp_tunnel_atomic_check_state(struct intel_atomic_state *state,
+				       struct intel_dp *intel_dp,
+				       struct intel_connector *connector);
+
+void intel_dp_tunnel_atomic_alloc_bw(struct intel_atomic_state *state);
+
+int intel_dp_tunnel_mgr_init(struct drm_i915_private *i915);
+void intel_dp_tunnel_mgr_cleanup(struct drm_i915_private *i915);
+
+#else
+
+static inline int
+intel_dp_tunnel_detect(struct intel_dp *intel_dp, struct drm_modeset_acquire_ctx *ctx)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline void intel_dp_tunnel_disconnect(struct intel_dp *intel_dp) {}
+static inline void intel_dp_tunnel_destroy(struct intel_dp *intel_dp) {}
+static inline void intel_dp_tunnel_resume(struct intel_dp *intel_dp,
+					  const struct intel_crtc_state *crtc_state,
+					  bool dpcd_updated) {}
+static inline void intel_dp_tunnel_suspend(struct intel_dp *intel_dp) {}
+
+static inline bool intel_dp_tunnel_bw_alloc_is_enabled(struct intel_dp *intel_dp)
+{
+	return false;
+}
+
+static inline void
+intel_dp_tunnel_atomic_cleanup_inherited_state(struct intel_atomic_state *state) {}
+
+static inline int
+intel_dp_tunnel_atomic_compute_stream_bw(struct intel_atomic_state *state,
+					 struct intel_dp *intel_dp,
+					 const struct intel_connector *connector,
+					 struct intel_crtc_state *crtc_state)
+{
+	return 0;
+}
+
+static inline void
+intel_dp_tunnel_atomic_clear_stream_bw(struct intel_atomic_state *state,
+				       struct intel_crtc_state *crtc_state) {}
+
+static inline int
+intel_dp_tunnel_atomic_add_state_for_crtc(struct intel_atomic_state *state,
+					  struct intel_crtc *crtc)
+{
+	return 0;
+}
+
+static inline int
+intel_dp_tunnel_atomic_check_link(struct intel_atomic_state *state,
+				  struct intel_link_bw_limits *limits)
+{
+	return 0;
+}
+
+static inline int
+intel_dp_tunnel_atomic_check_state(struct intel_atomic_state *state,
+				   struct intel_dp *intel_dp,
+				   struct intel_connector *connector)
+{
+	return 0;
+}
+
+static inline int
+intel_dp_tunnel_atomic_alloc_bw(struct intel_atomic_state *state)
+{
+	return 0;
+}
+
+static inline int
+intel_dp_tunnel_mgr_init(struct drm_i915_private *i915)
+{
+	return 0;
+}
+
+static inline void intel_dp_tunnel_mgr_cleanup(struct drm_i915_private *i915) {}
+
+#endif /* CONFIG_DRM_I915_DP_TUNNEL */
+
+#endif /* __INTEL_DP_TUNNEL_H__ */