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/* SPDX-License-Identifier: MIT */
/*
* Copyright © 2023 Intel Corporation
*/
#ifndef __DRM_DP_TUNNEL_H__
#define __DRM_DP_TUNNEL_H__
#include <linux/err.h>
#include <linux/errno.h>
#include <linux/types.h>
struct drm_dp_aux;
struct drm_device;
struct drm_atomic_state;
struct drm_dp_tunnel_mgr;
struct drm_dp_tunnel_state;
struct ref_tracker;
struct drm_dp_tunnel_ref {
struct drm_dp_tunnel *tunnel;
struct ref_tracker *tracker;
};
#ifdef CONFIG_DRM_DISPLAY_DP_TUNNEL
struct drm_dp_tunnel *
drm_dp_tunnel_get(struct drm_dp_tunnel *tunnel, struct ref_tracker **tracker);
void
drm_dp_tunnel_put(struct drm_dp_tunnel *tunnel, struct ref_tracker **tracker);
static inline void drm_dp_tunnel_ref_get(struct drm_dp_tunnel *tunnel,
struct drm_dp_tunnel_ref *tunnel_ref)
{
tunnel_ref->tunnel = drm_dp_tunnel_get(tunnel, &tunnel_ref->tracker);
}
static inline void drm_dp_tunnel_ref_put(struct drm_dp_tunnel_ref *tunnel_ref)
{
drm_dp_tunnel_put(tunnel_ref->tunnel, &tunnel_ref->tracker);
tunnel_ref->tunnel = NULL;
}
struct drm_dp_tunnel *
drm_dp_tunnel_detect(struct drm_dp_tunnel_mgr *mgr,
struct drm_dp_aux *aux);
int drm_dp_tunnel_destroy(struct drm_dp_tunnel *tunnel);
int drm_dp_tunnel_enable_bw_alloc(struct drm_dp_tunnel *tunnel);
int drm_dp_tunnel_disable_bw_alloc(struct drm_dp_tunnel *tunnel);
bool drm_dp_tunnel_bw_alloc_is_enabled(const struct drm_dp_tunnel *tunnel);
int drm_dp_tunnel_alloc_bw(struct drm_dp_tunnel *tunnel, int bw);
int drm_dp_tunnel_get_allocated_bw(struct drm_dp_tunnel *tunnel);
int drm_dp_tunnel_update_state(struct drm_dp_tunnel *tunnel);
void drm_dp_tunnel_set_io_error(struct drm_dp_tunnel *tunnel);
int drm_dp_tunnel_handle_irq(struct drm_dp_tunnel_mgr *mgr,
struct drm_dp_aux *aux);
int drm_dp_tunnel_max_dprx_rate(const struct drm_dp_tunnel *tunnel);
int drm_dp_tunnel_max_dprx_lane_count(const struct drm_dp_tunnel *tunnel);
int drm_dp_tunnel_available_bw(const struct drm_dp_tunnel *tunnel);
const char *drm_dp_tunnel_name(const struct drm_dp_tunnel *tunnel);
struct drm_dp_tunnel_state *
drm_dp_tunnel_atomic_get_state(struct drm_atomic_state *state,
struct drm_dp_tunnel *tunnel);
struct drm_dp_tunnel_state *
drm_dp_tunnel_atomic_get_old_state(struct drm_atomic_state *state,
const struct drm_dp_tunnel *tunnel);
struct drm_dp_tunnel_state *
drm_dp_tunnel_atomic_get_new_state(struct drm_atomic_state *state,
const struct drm_dp_tunnel *tunnel);
int drm_dp_tunnel_atomic_set_stream_bw(struct drm_atomic_state *state,
struct drm_dp_tunnel *tunnel,
u8 stream_id, int bw);
int drm_dp_tunnel_atomic_get_group_streams_in_state(struct drm_atomic_state *state,
const struct drm_dp_tunnel *tunnel,
u32 *stream_mask);
int drm_dp_tunnel_atomic_check_stream_bws(struct drm_atomic_state *state,
u32 *failed_stream_mask);
int drm_dp_tunnel_atomic_get_required_bw(const struct drm_dp_tunnel_state *tunnel_state);
struct drm_dp_tunnel_mgr *
drm_dp_tunnel_mgr_create(struct drm_device *dev, int max_group_count);
void drm_dp_tunnel_mgr_destroy(struct drm_dp_tunnel_mgr *mgr);
#else
static inline struct drm_dp_tunnel *
drm_dp_tunnel_get(struct drm_dp_tunnel *tunnel, struct ref_tracker **tracker)
{
return NULL;
}
static inline void
drm_dp_tunnel_put(struct drm_dp_tunnel *tunnel, struct ref_tracker **tracker) {}
static inline void drm_dp_tunnel_ref_get(struct drm_dp_tunnel *tunnel,
struct drm_dp_tunnel_ref *tunnel_ref) {}
static inline void drm_dp_tunnel_ref_put(struct drm_dp_tunnel_ref *tunnel_ref) {}
static inline struct drm_dp_tunnel *
drm_dp_tunnel_detect(struct drm_dp_tunnel_mgr *mgr,
struct drm_dp_aux *aux)
{
return ERR_PTR(-EOPNOTSUPP);
}
static inline int
drm_dp_tunnel_destroy(struct drm_dp_tunnel *tunnel)
{
return 0;
}
static inline int drm_dp_tunnel_enable_bw_alloc(struct drm_dp_tunnel *tunnel)
{
return -EOPNOTSUPP;
}
static inline int drm_dp_tunnel_disable_bw_alloc(struct drm_dp_tunnel *tunnel)
{
return -EOPNOTSUPP;
}
static inline bool drm_dp_tunnel_bw_alloc_is_enabled(const struct drm_dp_tunnel *tunnel)
{
return false;
}
static inline int
drm_dp_tunnel_alloc_bw(struct drm_dp_tunnel *tunnel, int bw)
{
return -EOPNOTSUPP;
}
static inline int
drm_dp_tunnel_get_allocated_bw(struct drm_dp_tunnel *tunnel)
{
return -1;
}
static inline int
drm_dp_tunnel_update_state(struct drm_dp_tunnel *tunnel)
{
return -EOPNOTSUPP;
}
static inline void drm_dp_tunnel_set_io_error(struct drm_dp_tunnel *tunnel) {}
static inline int
drm_dp_tunnel_handle_irq(struct drm_dp_tunnel_mgr *mgr,
struct drm_dp_aux *aux)
{
return -EOPNOTSUPP;
}
static inline int
drm_dp_tunnel_max_dprx_rate(const struct drm_dp_tunnel *tunnel)
{
return 0;
}
static inline int
drm_dp_tunnel_max_dprx_lane_count(const struct drm_dp_tunnel *tunnel)
{
return 0;
}
static inline int
drm_dp_tunnel_available_bw(const struct drm_dp_tunnel *tunnel)
{
return -1;
}
static inline const char *
drm_dp_tunnel_name(const struct drm_dp_tunnel *tunnel)
{
return NULL;
}
static inline struct drm_dp_tunnel_state *
drm_dp_tunnel_atomic_get_state(struct drm_atomic_state *state,
struct drm_dp_tunnel *tunnel)
{
return ERR_PTR(-EOPNOTSUPP);
}
static inline struct drm_dp_tunnel_state *
drm_dp_tunnel_atomic_get_new_state(struct drm_atomic_state *state,
const struct drm_dp_tunnel *tunnel)
{
return ERR_PTR(-EOPNOTSUPP);
}
static inline int
drm_dp_tunnel_atomic_set_stream_bw(struct drm_atomic_state *state,
struct drm_dp_tunnel *tunnel,
u8 stream_id, int bw)
{
return -EOPNOTSUPP;
}
static inline int
drm_dp_tunnel_atomic_get_group_streams_in_state(struct drm_atomic_state *state,
const struct drm_dp_tunnel *tunnel,
u32 *stream_mask)
{
return -EOPNOTSUPP;
}
static inline int
drm_dp_tunnel_atomic_check_stream_bws(struct drm_atomic_state *state,
u32 *failed_stream_mask)
{
return -EOPNOTSUPP;
}
static inline int
drm_dp_tunnel_atomic_get_required_bw(const struct drm_dp_tunnel_state *tunnel_state)
{
return 0;
}
static inline struct drm_dp_tunnel_mgr *
drm_dp_tunnel_mgr_create(struct drm_device *dev, int max_group_count)
{
return ERR_PTR(-EOPNOTSUPP);
}
static inline
void drm_dp_tunnel_mgr_destroy(struct drm_dp_tunnel_mgr *mgr) {}
#endif /* CONFIG_DRM_DISPLAY_DP_TUNNEL */
#endif /* __DRM_DP_TUNNEL_H__ */
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