From f9004dbfff8a3fbbd7e2a88c8a4327c7f2f8e5b2 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 31 Jan 2024 01:04:47 +0000
Subject: [PATCH] add driver 5G
---
kernel/include/drm/drm_dp_mst_helper.h | 585 +++++++++++++++++++++++++++++++++++++++++++---------------
1 files changed, 432 insertions(+), 153 deletions(-)
diff --git a/kernel/include/drm/drm_dp_mst_helper.h b/kernel/include/drm/drm_dp_mst_helper.h
index 864b2f8..bd1c399 100644
--- a/kernel/include/drm/drm_dp_mst_helper.h
+++ b/kernel/include/drm/drm_dp_mst_helper.h
@@ -26,8 +26,27 @@
#include <drm/drm_dp_helper.h>
#include <drm/drm_atomic.h>
+#if IS_ENABLED(CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS)
+#include <linux/stackdepot.h>
+#include <linux/timekeeping.h>
+
+enum drm_dp_mst_topology_ref_type {
+ DRM_DP_MST_TOPOLOGY_REF_GET,
+ DRM_DP_MST_TOPOLOGY_REF_PUT,
+};
+
+struct drm_dp_mst_topology_ref_history {
+ struct drm_dp_mst_topology_ref_entry {
+ enum drm_dp_mst_topology_ref_type type;
+ int count;
+ ktime_t ts_nsec;
+ depot_stack_handle_t backtrace;
+ } *entries;
+ int len;
+};
+#endif /* IS_ENABLED(CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS) */
+
struct drm_dp_mst_branch;
-struct drm_dp_mst_port;
/**
* struct drm_dp_vcpi - Virtual Channel Payload Identifier
@@ -43,44 +62,60 @@
int num_slots;
};
-struct drm_dp_mst_dsc_dpcd_cache {
- bool valid;
- bool use_parent_dpcd;
- u8 dsc_dpcd[16];
-};
-
-struct drm_dp_mst_dsc_info {
- bool dsc_support;
- struct drm_dp_mst_port *dsc_port;
- struct drm_dp_mst_dsc_dpcd_cache dsc_dpcd_cache;
-};
-
/**
* struct drm_dp_mst_port - MST port
- * @kref: reference count for this port.
* @port_num: port number
- * @input: if this port is an input port.
- * @mcs: message capability status - DP 1.2 spec.
- * @ddps: DisplayPort Device Plug Status - DP 1.2
- * @pdt: Peer Device Type
- * @ldps: Legacy Device Plug Status
- * @dpcd_rev: DPCD revision of device on this port
- * @num_sdp_streams: Number of simultaneous streams
- * @num_sdp_stream_sinks: Number of stream sinks
- * @available_pbn: Available bandwidth for this port.
+ * @input: if this port is an input port. Protected by
+ * &drm_dp_mst_topology_mgr.base.lock.
+ * @mcs: message capability status - DP 1.2 spec. Protected by
+ * &drm_dp_mst_topology_mgr.base.lock.
+ * @ddps: DisplayPort Device Plug Status - DP 1.2. Protected by
+ * &drm_dp_mst_topology_mgr.base.lock.
+ * @pdt: Peer Device Type. Protected by
+ * &drm_dp_mst_topology_mgr.base.lock.
+ * @ldps: Legacy Device Plug Status. Protected by
+ * &drm_dp_mst_topology_mgr.base.lock.
+ * @dpcd_rev: DPCD revision of device on this port. Protected by
+ * &drm_dp_mst_topology_mgr.base.lock.
+ * @num_sdp_streams: Number of simultaneous streams. Protected by
+ * &drm_dp_mst_topology_mgr.base.lock.
+ * @num_sdp_stream_sinks: Number of stream sinks. Protected by
+ * &drm_dp_mst_topology_mgr.base.lock.
+ * @full_pbn: Max possible bandwidth for this port. Protected by
+ * &drm_dp_mst_topology_mgr.base.lock.
* @next: link to next port on this branch device
- * @mstb: branch device attach below this port
- * @aux: i2c aux transport to talk to device connected to this port.
+ * @aux: i2c aux transport to talk to device connected to this port, protected
+ * by &drm_dp_mst_topology_mgr.base.lock.
* @parent: branch device parent of this port
* @vcpi: Virtual Channel Payload info for this port.
- * @connector: DRM connector this port is connected to.
+ * @connector: DRM connector this port is connected to. Protected by
+ * &drm_dp_mst_topology_mgr.base.lock.
* @mgr: topology manager this port lives under.
*
* This structure represents an MST port endpoint on a device somewhere
* in the MST topology.
*/
struct drm_dp_mst_port {
- struct kref kref;
+ /**
+ * @topology_kref: refcount for this port's lifetime in the topology,
+ * only the DP MST helpers should need to touch this
+ */
+ struct kref topology_kref;
+
+ /**
+ * @malloc_kref: refcount for the memory allocation containing this
+ * structure. See drm_dp_mst_get_port_malloc() and
+ * drm_dp_mst_put_port_malloc().
+ */
+ struct kref malloc_kref;
+
+#if IS_ENABLED(CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS)
+ /**
+ * @topology_ref_history: A history of each topology
+ * reference/dereference. See CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS.
+ */
+ struct drm_dp_mst_topology_ref_history topology_ref_history;
+#endif
u8 port_num;
bool input;
@@ -91,9 +126,19 @@
u8 dpcd_rev;
u8 num_sdp_streams;
u8 num_sdp_stream_sinks;
- uint16_t available_pbn;
+ uint16_t full_pbn;
struct list_head next;
- struct drm_dp_mst_branch *mstb; /* pointer to an mstb if this port has one */
+ /**
+ * @mstb: the branch device connected to this port, if there is one.
+ * This should be considered protected for reading by
+ * &drm_dp_mst_topology_mgr.lock. There are two exceptions to this:
+ * &drm_dp_mst_topology_mgr.up_req_work and
+ * &drm_dp_mst_topology_mgr.work, which do not grab
+ * &drm_dp_mst_topology_mgr.lock during reads but are the only
+ * updaters of this list and are protected from writing concurrently
+ * by &drm_dp_mst_topology_mgr.probe_lock.
+ */
+ struct drm_dp_mst_branch *mstb;
struct drm_dp_aux aux; /* i2c bus for this port? */
struct drm_dp_mst_branch *parent;
@@ -112,53 +157,12 @@
*/
bool has_audio;
+ /**
+ * @fec_capable: bool indicating if FEC can be supported up to that
+ * point in the MST topology.
+ */
bool fec_capable;
-
- struct drm_dp_mst_dsc_info dsc_info;
};
-
-/**
- * struct drm_dp_mst_branch - MST branch device.
- * @kref: reference count for this port.
- * @rad: Relative Address to talk to this branch device.
- * @lct: Link count total to talk to this branch device.
- * @num_ports: number of ports on the branch.
- * @msg_slots: one bit per transmitted msg slot.
- * @ports: linked list of ports on this branch.
- * @port_parent: pointer to the port parent, NULL if toplevel.
- * @mgr: topology manager for this branch device.
- * @tx_slots: transmission slots for this device.
- * @last_seqno: last sequence number used to talk to this.
- * @link_address_sent: if a link address message has been sent to this device yet.
- * @guid: guid for DP 1.2 branch device. port under this branch can be
- * identified by port #.
- *
- * This structure represents an MST branch device, there is one
- * primary branch device at the root, along with any other branches connected
- * to downstream port of parent branches.
- */
-struct drm_dp_mst_branch {
- struct kref kref;
- u8 rad[8];
- u8 lct;
- int num_ports;
-
- int msg_slots;
- struct list_head ports;
-
- /* list of tx ops queue for this port */
- struct drm_dp_mst_port *port_parent;
- struct drm_dp_mst_topology_mgr *mgr;
-
- /* slots are protected by mstb->mgr->qlock */
- struct drm_dp_sideband_msg_tx *tx_slots[2];
- int last_seqno;
- bool link_address_sent;
-
- /* global unique identifier to identify branch devices */
- u8 guid[16];
-};
-
/* sideband msg header - not bit struct */
struct drm_dp_sideband_msg_hdr {
@@ -172,6 +176,87 @@
bool eomt;
bool seqno;
};
+
+struct drm_dp_sideband_msg_rx {
+ u8 chunk[48];
+ u8 msg[256];
+ u8 curchunk_len;
+ u8 curchunk_idx; /* chunk we are parsing now */
+ u8 curchunk_hdrlen;
+ u8 curlen; /* total length of the msg */
+ bool have_somt;
+ bool have_eomt;
+ struct drm_dp_sideband_msg_hdr initial_hdr;
+};
+
+/**
+ * struct drm_dp_mst_branch - MST branch device.
+ * @rad: Relative Address to talk to this branch device.
+ * @lct: Link count total to talk to this branch device.
+ * @num_ports: number of ports on the branch.
+ * @port_parent: pointer to the port parent, NULL if toplevel.
+ * @mgr: topology manager for this branch device.
+ * @link_address_sent: if a link address message has been sent to this device yet.
+ * @guid: guid for DP 1.2 branch device. port under this branch can be
+ * identified by port #.
+ *
+ * This structure represents an MST branch device, there is one
+ * primary branch device at the root, along with any other branches connected
+ * to downstream port of parent branches.
+ */
+struct drm_dp_mst_branch {
+ /**
+ * @topology_kref: refcount for this branch device's lifetime in the
+ * topology, only the DP MST helpers should need to touch this
+ */
+ struct kref topology_kref;
+
+ /**
+ * @malloc_kref: refcount for the memory allocation containing this
+ * structure. See drm_dp_mst_get_mstb_malloc() and
+ * drm_dp_mst_put_mstb_malloc().
+ */
+ struct kref malloc_kref;
+
+#if IS_ENABLED(CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS)
+ /**
+ * @topology_ref_history: A history of each topology
+ * reference/dereference. See CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS.
+ */
+ struct drm_dp_mst_topology_ref_history topology_ref_history;
+#endif
+
+ /**
+ * @destroy_next: linked-list entry used by
+ * drm_dp_delayed_destroy_work()
+ */
+ struct list_head destroy_next;
+
+ u8 rad[8];
+ u8 lct;
+ int num_ports;
+
+ /**
+ * @ports: the list of ports on this branch device. This should be
+ * considered protected for reading by &drm_dp_mst_topology_mgr.lock.
+ * There are two exceptions to this:
+ * &drm_dp_mst_topology_mgr.up_req_work and
+ * &drm_dp_mst_topology_mgr.work, which do not grab
+ * &drm_dp_mst_topology_mgr.lock during reads but are the only
+ * updaters of this list and are protected from updating the list
+ * concurrently by @drm_dp_mst_topology_mgr.probe_lock
+ */
+ struct list_head ports;
+
+ struct drm_dp_mst_port *port_parent;
+ struct drm_dp_mst_topology_mgr *mgr;
+
+ bool link_address_sent;
+
+ /* global unique identifier to identify branch devices */
+ u8 guid[16];
+};
+
struct drm_dp_nak_reply {
u8 guid[16];
@@ -228,17 +313,33 @@
u8 port_number;
};
+struct drm_dp_query_stream_enc_status_ack_reply {
+ /* Bit[23:16]- Stream Id */
+ u8 stream_id;
-struct drm_dp_sideband_msg_rx {
- u8 chunk[48];
- u8 msg[256];
- u8 curchunk_len;
- u8 curchunk_idx; /* chunk we are parsing now */
- u8 curchunk_hdrlen;
- u8 curlen; /* total length of the msg */
- bool have_somt;
- bool have_eomt;
- struct drm_dp_sideband_msg_hdr initial_hdr;
+ /* Bit[15]- Signed */
+ bool reply_signed;
+
+ /* Bit[10:8]- Stream Output Sink Type */
+ bool unauthorizable_device_present;
+ bool legacy_device_present;
+ bool query_capable_device_present;
+
+ /* Bit[12:11]- Stream Output CP Type */
+ bool hdcp_1x_device_present;
+ bool hdcp_2x_device_present;
+
+ /* Bit[4]- Stream Authentication */
+ bool auth_completed;
+
+ /* Bit[3]- Stream Encryption */
+ bool encryption_enabled;
+
+ /* Bit[2]- Stream Repeater Function Present */
+ bool repeater_present;
+
+ /* Bit[1:0]- Stream State */
+ u8 state;
};
#define DRM_DP_MAX_SDP_STREAMS 16
@@ -283,7 +384,7 @@
struct drm_dp_remote_i2c_read {
u8 num_transactions;
u8 port_number;
- struct {
+ struct drm_dp_remote_i2c_read_tx {
u8 i2c_dev_id;
u8 num_bytes;
u8 *bytes;
@@ -299,6 +400,15 @@
u8 write_i2c_device_id;
u8 num_bytes;
u8 *bytes;
+};
+
+struct drm_dp_query_stream_enc_status {
+ u8 stream_id;
+ u8 client_id[7]; /* 56-bit nonce */
+ u8 stream_event;
+ bool valid_stream_event;
+ u8 stream_behavior;
+ u8 valid_stream_behavior;
};
/* this covers ENUM_RESOURCES, POWER_DOWN_PHY, POWER_UP_PHY */
@@ -349,6 +459,8 @@
struct drm_dp_remote_i2c_read i2c_read;
struct drm_dp_remote_i2c_write i2c_write;
+
+ struct drm_dp_query_stream_enc_status enc_status;
} u;
};
@@ -371,6 +483,8 @@
struct drm_dp_remote_i2c_read_ack_reply remote_i2c_read_ack;
struct drm_dp_remote_i2c_read_nak_reply remote_i2c_read_nack;
struct drm_dp_remote_i2c_write_ack_reply remote_i2c_write_ack;
+
+ struct drm_dp_query_stream_enc_status_ack_reply enc_status;
} u;
};
@@ -402,11 +516,15 @@
struct drm_dp_mst_topology_cbs {
/* create a connector for a port */
struct drm_connector *(*add_connector)(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, const char *path);
- void (*register_connector)(struct drm_connector *connector);
- void (*destroy_connector)(struct drm_dp_mst_topology_mgr *mgr,
- struct drm_connector *connector);
- void (*hotplug)(struct drm_dp_mst_topology_mgr *mgr);
-
+ /*
+ * Checks for any pending MST interrupts, passing them to MST core for
+ * processing, the same way an HPD IRQ pulse handler would do this.
+ * If provided MST core calls this callback from a poll-waiting loop
+ * when waiting for MST down message replies. The driver is expected
+ * to guard against a race between this callback and the driver's HPD
+ * IRQ pulse handler.
+ */
+ void (*poll_hpd_irq)(struct drm_dp_mst_topology_mgr *mgr);
};
#define DP_MAX_PAYLOAD (sizeof(unsigned long) * 8)
@@ -424,10 +542,17 @@
#define to_dp_mst_topology_state(x) container_of(x, struct drm_dp_mst_topology_state, base)
+struct drm_dp_vcpi_allocation {
+ struct drm_dp_mst_port *port;
+ int vcpi;
+ int pbn;
+ bool dsc_enabled;
+ struct list_head next;
+};
+
struct drm_dp_mst_topology_state {
struct drm_private_state base;
- int avail_slots;
- struct drm_atomic_state *state;
+ struct list_head vcpis;
struct drm_dp_mst_topology_mgr *mgr;
};
@@ -475,28 +600,41 @@
int conn_base_id;
/**
- * @down_rep_recv: Message receiver state for down replies. This and
- * @up_req_recv are only ever access from the work item, which is
- * serialised.
- */
- struct drm_dp_sideband_msg_rx down_rep_recv;
- /**
- * @up_req_recv: Message receiver state for up requests. This and
- * @down_rep_recv are only ever access from the work item, which is
- * serialised.
+ * @up_req_recv: Message receiver state for up requests.
*/
struct drm_dp_sideband_msg_rx up_req_recv;
/**
- * @lock: protects mst state, primary, dpcd.
+ * @down_rep_recv: Message receiver state for replies to down
+ * requests.
+ */
+ struct drm_dp_sideband_msg_rx down_rep_recv;
+
+ /**
+ * @lock: protects @mst_state, @mst_primary, @dpcd, and
+ * @payload_id_table_cleared.
*/
struct mutex lock;
+
+ /**
+ * @probe_lock: Prevents @work and @up_req_work, the only writers of
+ * &drm_dp_mst_port.mstb and &drm_dp_mst_branch.ports, from racing
+ * while they update the topology.
+ */
+ struct mutex probe_lock;
/**
* @mst_state: If this manager is enabled for an MST capable port. False
* if no MST sink/branch devices is connected.
*/
- bool mst_state;
+ bool mst_state : 1;
+
+ /**
+ * @payload_id_table_cleared: Whether or not we've cleared the payload
+ * ID table for @mst_primary. Protected by @lock.
+ */
+ bool payload_id_table_cleared : 1;
+
/**
* @mst_primary: Pointer to the primary/first branch device.
*/
@@ -516,22 +654,17 @@
int pbn_div;
/**
- * @state: State information for topology manager
- */
- struct drm_dp_mst_topology_state *state;
-
- /**
* @funcs: Atomic helper callbacks
*/
const struct drm_private_state_funcs *funcs;
/**
- * @qlock: protects @tx_msg_downq, the &drm_dp_mst_branch.txslost and
- * &drm_dp_sideband_msg_tx.state once they are queued
+ * @qlock: protects @tx_msg_downq and &drm_dp_sideband_msg_tx.state
*/
struct mutex qlock;
+
/**
- * @tx_msg_downq: List of pending down replies.
+ * @tx_msg_downq: List of pending down requests
*/
struct list_head tx_msg_downq;
@@ -541,11 +674,13 @@
struct mutex payload_lock;
/**
* @proposed_vcpis: Array of pointers for the new VCPI allocation. The
- * VCPI structure itself is &drm_dp_mst_port.vcpi.
+ * VCPI structure itself is &drm_dp_mst_port.vcpi, and the size of
+ * this array is determined by @max_payloads.
*/
struct drm_dp_vcpi **proposed_vcpis;
/**
- * @payloads: Array of payloads.
+ * @payloads: Array of payloads. The size of this array is determined
+ * by @max_payloads.
*/
struct drm_dp_payload *payloads;
/**
@@ -574,18 +709,57 @@
struct work_struct tx_work;
/**
- * @destroy_connector_list: List of to be destroyed connectors.
+ * @destroy_port_list: List of to be destroyed connectors.
*/
- struct list_head destroy_connector_list;
+ struct list_head destroy_port_list;
/**
- * @destroy_connector_lock: Protects @connector_list.
+ * @destroy_branch_device_list: List of to be destroyed branch
+ * devices.
*/
- struct mutex destroy_connector_lock;
+ struct list_head destroy_branch_device_list;
/**
- * @destroy_connector_work: Work item to destroy connectors. Needed to
- * avoid locking inversion.
+ * @delayed_destroy_lock: Protects @destroy_port_list and
+ * @destroy_branch_device_list.
*/
- struct work_struct destroy_connector_work;
+ struct mutex delayed_destroy_lock;
+
+ /**
+ * @delayed_destroy_wq: Workqueue used for delayed_destroy_work items.
+ * A dedicated WQ makes it possible to drain any requeued work items
+ * on it.
+ */
+ struct workqueue_struct *delayed_destroy_wq;
+
+ /**
+ * @delayed_destroy_work: Work item to destroy MST port and branch
+ * devices, needed to avoid locking inversion.
+ */
+ struct work_struct delayed_destroy_work;
+
+ /**
+ * @up_req_list: List of pending up requests from the topology that
+ * need to be processed, in chronological order.
+ */
+ struct list_head up_req_list;
+ /**
+ * @up_req_lock: Protects @up_req_list
+ */
+ struct mutex up_req_lock;
+ /**
+ * @up_req_work: Work item to process up requests received from the
+ * topology. Needed to avoid blocking hotplug handling and sideband
+ * transmissions.
+ */
+ struct work_struct up_req_work;
+
+#if IS_ENABLED(CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS)
+ /**
+ * @topology_ref_history_lock: protects
+ * &drm_dp_mst_port.topology_ref_history and
+ * &drm_dp_mst_branch.topology_ref_history.
+ */
+ struct mutex topology_ref_history_lock;
+#endif
};
int drm_dp_mst_topology_mgr_init(struct drm_dp_mst_topology_mgr *mgr,
@@ -595,26 +769,23 @@
void drm_dp_mst_topology_mgr_destroy(struct drm_dp_mst_topology_mgr *mgr);
-
+bool drm_dp_read_mst_cap(struct drm_dp_aux *aux, const u8 dpcd[DP_RECEIVER_CAP_SIZE]);
int drm_dp_mst_topology_mgr_set_mst(struct drm_dp_mst_topology_mgr *mgr, bool mst_state);
-
int drm_dp_mst_hpd_irq(struct drm_dp_mst_topology_mgr *mgr, u8 *esi, bool *handled);
-enum drm_connector_status drm_dp_mst_detect_port(struct drm_connector *connector, struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port);
-
-bool drm_dp_mst_port_has_audio(struct drm_dp_mst_topology_mgr *mgr,
- struct drm_dp_mst_port *port);
-
-bool drm_dp_mst_has_fec(struct drm_dp_mst_topology_mgr *mgr,
- struct drm_dp_mst_port *port);
+int
+drm_dp_mst_detect_port(struct drm_connector *connector,
+ struct drm_modeset_acquire_ctx *ctx,
+ struct drm_dp_mst_topology_mgr *mgr,
+ struct drm_dp_mst_port *port);
struct edid *drm_dp_mst_get_edid(struct drm_connector *connector, struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port);
+int drm_dp_get_vc_payload_bw(int link_rate, int link_lane_count);
-int drm_dp_calc_pbn_mode(int clock, int bpp);
-
+int drm_dp_calc_pbn_mode(int clock, int bpp, bool dsc);
bool drm_dp_mst_allocate_vcpi(struct drm_dp_mst_topology_mgr *mgr,
struct drm_dp_mst_port *port, int pbn, int slots);
@@ -644,36 +815,144 @@
struct drm_dp_mst_topology_mgr *mgr);
void drm_dp_mst_topology_mgr_suspend(struct drm_dp_mst_topology_mgr *mgr);
-int drm_dp_mst_topology_mgr_resume(struct drm_dp_mst_topology_mgr *mgr);
+int __must_check
+drm_dp_mst_topology_mgr_resume(struct drm_dp_mst_topology_mgr *mgr,
+ bool sync);
+
+ssize_t drm_dp_mst_dpcd_read(struct drm_dp_aux *aux,
+ unsigned int offset, void *buffer, size_t size);
+ssize_t drm_dp_mst_dpcd_write(struct drm_dp_aux *aux,
+ unsigned int offset, void *buffer, size_t size);
+
+int drm_dp_mst_connector_late_register(struct drm_connector *connector,
+ struct drm_dp_mst_port *port);
+void drm_dp_mst_connector_early_unregister(struct drm_connector *connector,
+ struct drm_dp_mst_port *port);
+
struct drm_dp_mst_topology_state *drm_atomic_get_mst_topology_state(struct drm_atomic_state *state,
struct drm_dp_mst_topology_mgr *mgr);
-int drm_dp_atomic_find_vcpi_slots(struct drm_atomic_state *state,
- struct drm_dp_mst_topology_mgr *mgr,
- struct drm_dp_mst_port *port, int pbn);
-int drm_dp_atomic_release_vcpi_slots(struct drm_atomic_state *state,
- struct drm_dp_mst_topology_mgr *mgr,
- int slots);
+int __must_check
+drm_dp_atomic_find_vcpi_slots(struct drm_atomic_state *state,
+ struct drm_dp_mst_topology_mgr *mgr,
+ struct drm_dp_mst_port *port, int pbn,
+ int pbn_div);
+int drm_dp_mst_atomic_enable_dsc(struct drm_atomic_state *state,
+ struct drm_dp_mst_port *port,
+ int pbn, int pbn_div,
+ bool enable);
+int __must_check
+drm_dp_mst_add_affected_dsc_crtcs(struct drm_atomic_state *state,
+ struct drm_dp_mst_topology_mgr *mgr);
+int __must_check
+drm_dp_atomic_release_vcpi_slots(struct drm_atomic_state *state,
+ struct drm_dp_mst_topology_mgr *mgr,
+ struct drm_dp_mst_port *port);
int drm_dp_send_power_updown_phy(struct drm_dp_mst_topology_mgr *mgr,
struct drm_dp_mst_port *port, bool power_up);
+int drm_dp_send_query_stream_enc_status(struct drm_dp_mst_topology_mgr *mgr,
+ struct drm_dp_mst_port *port,
+ struct drm_dp_query_stream_enc_status_ack_reply *status);
+int __must_check drm_dp_mst_atomic_check(struct drm_atomic_state *state);
-int drm_dp_mst_get_dsc_info(struct drm_dp_mst_topology_mgr *mgr,
- struct drm_dp_mst_port *port,
- struct drm_dp_mst_dsc_info *dsc_info);
+void drm_dp_mst_get_port_malloc(struct drm_dp_mst_port *port);
+void drm_dp_mst_put_port_malloc(struct drm_dp_mst_port *port);
-int drm_dp_mst_update_dsc_info(struct drm_dp_mst_topology_mgr *mgr,
- struct drm_dp_mst_port *port,
- struct drm_dp_mst_dsc_info *dsc_info);
+struct drm_dp_aux *drm_dp_mst_dsc_aux_for_port(struct drm_dp_mst_port *port);
-int drm_dp_send_dpcd_write(struct drm_dp_mst_topology_mgr *mgr,
- struct drm_dp_mst_port *port,
- int offset, int size, u8 *bytes);
+extern const struct drm_private_state_funcs drm_dp_mst_topology_state_funcs;
-int drm_dp_send_dpcd_read(struct drm_dp_mst_topology_mgr *mgr,
- struct drm_dp_mst_port *port,
- int offset, int size, u8 *bytes);
+/**
+ * __drm_dp_mst_state_iter_get - private atomic state iterator function for
+ * macro-internal use
+ * @state: &struct drm_atomic_state pointer
+ * @mgr: pointer to the &struct drm_dp_mst_topology_mgr iteration cursor
+ * @old_state: optional pointer to the old &struct drm_dp_mst_topology_state
+ * iteration cursor
+ * @new_state: optional pointer to the new &struct drm_dp_mst_topology_state
+ * iteration cursor
+ * @i: int iteration cursor, for macro-internal use
+ *
+ * Used by for_each_oldnew_mst_mgr_in_state(),
+ * for_each_old_mst_mgr_in_state(), and for_each_new_mst_mgr_in_state(). Don't
+ * call this directly.
+ *
+ * Returns:
+ * True if the current &struct drm_private_obj is a &struct
+ * drm_dp_mst_topology_mgr, false otherwise.
+ */
+static inline bool
+__drm_dp_mst_state_iter_get(struct drm_atomic_state *state,
+ struct drm_dp_mst_topology_mgr **mgr,
+ struct drm_dp_mst_topology_state **old_state,
+ struct drm_dp_mst_topology_state **new_state,
+ int i)
+{
+ struct __drm_private_objs_state *objs_state = &state->private_objs[i];
-int drm_dp_mst_get_max_sdp_streams_supported(
- struct drm_dp_mst_topology_mgr *mgr,
- struct drm_dp_mst_port *port);
+ if (objs_state->ptr->funcs != &drm_dp_mst_topology_state_funcs)
+ return false;
+
+ *mgr = to_dp_mst_topology_mgr(objs_state->ptr);
+ if (old_state)
+ *old_state = to_dp_mst_topology_state(objs_state->old_state);
+ if (new_state)
+ *new_state = to_dp_mst_topology_state(objs_state->new_state);
+
+ return true;
+}
+
+/**
+ * for_each_oldnew_mst_mgr_in_state - iterate over all DP MST topology
+ * managers in an atomic update
+ * @__state: &struct drm_atomic_state pointer
+ * @mgr: &struct drm_dp_mst_topology_mgr iteration cursor
+ * @old_state: &struct drm_dp_mst_topology_state iteration cursor for the old
+ * state
+ * @new_state: &struct drm_dp_mst_topology_state iteration cursor for the new
+ * state
+ * @__i: int iteration cursor, for macro-internal use
+ *
+ * This iterates over all DRM DP MST topology managers in an atomic update,
+ * tracking both old and new state. This is useful in places where the state
+ * delta needs to be considered, for example in atomic check functions.
+ */
+#define for_each_oldnew_mst_mgr_in_state(__state, mgr, old_state, new_state, __i) \
+ for ((__i) = 0; (__i) < (__state)->num_private_objs; (__i)++) \
+ for_each_if(__drm_dp_mst_state_iter_get((__state), &(mgr), &(old_state), &(new_state), (__i)))
+
+/**
+ * for_each_old_mst_mgr_in_state - iterate over all DP MST topology managers
+ * in an atomic update
+ * @__state: &struct drm_atomic_state pointer
+ * @mgr: &struct drm_dp_mst_topology_mgr iteration cursor
+ * @old_state: &struct drm_dp_mst_topology_state iteration cursor for the old
+ * state
+ * @__i: int iteration cursor, for macro-internal use
+ *
+ * This iterates over all DRM DP MST topology managers in an atomic update,
+ * tracking only the old state. This is useful in disable functions, where we
+ * need the old state the hardware is still in.
+ */
+#define for_each_old_mst_mgr_in_state(__state, mgr, old_state, __i) \
+ for ((__i) = 0; (__i) < (__state)->num_private_objs; (__i)++) \
+ for_each_if(__drm_dp_mst_state_iter_get((__state), &(mgr), &(old_state), NULL, (__i)))
+
+/**
+ * for_each_new_mst_mgr_in_state - iterate over all DP MST topology managers
+ * in an atomic update
+ * @__state: &struct drm_atomic_state pointer
+ * @mgr: &struct drm_dp_mst_topology_mgr iteration cursor
+ * @new_state: &struct drm_dp_mst_topology_state iteration cursor for the new
+ * state
+ * @__i: int iteration cursor, for macro-internal use
+ *
+ * This iterates over all DRM DP MST topology managers in an atomic update,
+ * tracking only the new state. This is useful in enable functions, where we
+ * need the new state the hardware should be in when the atomic commit
+ * operation has completed.
+ */
+#define for_each_new_mst_mgr_in_state(__state, mgr, new_state, __i) \
+ for ((__i) = 0; (__i) < (__state)->num_private_objs; (__i)++) \
+ for_each_if(__drm_dp_mst_state_iter_get((__state), &(mgr), NULL, &(new_state), (__i)))
#endif
--
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