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drm/dp-mst: Missing kernel doc 

Cc: Dave Airlie <airlied@redhat.com>
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1468612088-9721-7-git-send-email-daniel.vetter@ffwll.ch
This commit is contained in:
Daniel Vetter 2016-07-15 21:48:04 +02:00
parent cb021a3eb6
commit 132d49d728
2 changed files with 117 additions and 24 deletions
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1
drivers/gpu/drm/drm_dp_mst_topology.c
View File

@ -2365,6 +2365,7 @@ EXPORT_SYMBOL(drm_dp_mst_hpd_irq);
/**
* drm_dp_mst_detect_port() - get connection status for an MST port
* @connector: DRM connector for this port
* @mgr: manager for this port
* @port: unverified pointer to a port
*

140
include/drm/drm_dp_mst_helper.h
View File

@ -87,7 +87,15 @@ struct drm_dp_mst_port {
struct drm_connector *connector;
struct drm_dp_mst_topology_mgr *mgr;
struct edid *cached_edid; /* for DP logical ports - make tiling work */
/**
* @cached_edid: for DP logical ports - make tiling work by ensuring
* that the EDID for all connectors is read immediately.
*/
struct edid *cached_edid;
/**
* @has_audio: Tracks whether the sink connector to this port is
* audio-capable.
*/
bool has_audio;
};
@ -397,70 +405,154 @@ struct drm_dp_payload {
/**
* struct drm_dp_mst_topology_mgr - DisplayPort MST manager
* @dev: device pointer for adding i2c devices etc.
* @cbs: callbacks for connector addition and destruction.
* @max_dpcd_transaction_bytes - maximum number of bytes to read/write in one go.
* @aux: aux channel for the DP connector.
* @max_payloads: maximum number of payloads the GPU can generate.
* @conn_base_id: DRM connector ID this mgr is connected to.
* @down_rep_recv: msg receiver state for down replies.
* @up_req_recv: msg receiver state for up requests.
* @lock: protects mst state, primary, dpcd.
* @mst_state: if this manager is enabled for an MST capable port.
* @mst_primary: pointer to the primary branch device.
* @dpcd: cache of DPCD for primary port.
* @pbn_div: PBN to slots divisor.
*
* This struct represents the toplevel displayport MST topology manager.
* There should be one instance of this for every MST capable DP connector
* on the GPU.
*/
struct drm_dp_mst_topology_mgr {
/**
* @dev: device pointer for adding i2c devices etc.
*/
struct device *dev;
/**
* @cbs: callbacks for connector addition and destruction.
*/
const struct drm_dp_mst_topology_cbs *cbs;
/**
* @max_dpcd_transaction_bytes: maximum number of bytes to read/write
* in one go.
*/
int max_dpcd_transaction_bytes;
struct drm_dp_aux *aux; /* auxch for this topology mgr to use */
/**
* @aux: AUX channel for the DP MST connector this topolgy mgr is
* controlling.
*/
struct drm_dp_aux *aux;
/**
* @max_payloads: maximum number of payloads the GPU can generate.
*/
int max_payloads;
/**
* @conn_base_id: DRM connector ID this mgr is connected to. Only used
* to build the MST connector path value.
*/
int conn_base_id;
/* only ever accessed from the workqueue - which should be serialised */
/**
* @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.
*/
struct drm_dp_sideband_msg_rx up_req_recv;
/* pointer to info about the initial MST device */
struct mutex lock; /* protects mst_state + primary + dpcd */
/**
* @lock: protects mst state, primary, dpcd.
*/
struct mutex 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;
/**
* @mst_primary: Pointer to the primary/first branch device.
*/
struct drm_dp_mst_branch *mst_primary;
/**
* @dpcd: Cache of DPCD for primary port.
*/
u8 dpcd[DP_RECEIVER_CAP_SIZE];
/**
* @sink_count: Sink count from DEVICE_SERVICE_IRQ_VECTOR_ESI0.
*/
u8 sink_count;
/**
* @pbn_div: PBN to slots divisor.
*/
int pbn_div;
/**
* @total_slots: Total slots that can be allocated.
*/
int total_slots;
/**
* @avail_slots: Still available slots that can be allocated.
*/
int avail_slots;
/**
* @total_pbn: Total PBN count.
*/
int total_pbn;
/* messages to be transmitted */
/* qlock protects the upq/downq and in_progress,
the mstb tx_slots and txmsg->state once they are queued */
/**
* @qlock: protects @tx_msg_downq, the tx_slots in struct
* &drm_dp_mst_branch and txmsg->state once they are queued
*/
struct mutex qlock;
/**
* @tx_msg_downq: List of pending down replies.
*/
struct list_head tx_msg_downq;
/* payload info + lock for it */
/**
* @payload_lock: Protect payload information.
*/
struct mutex payload_lock;
/**
* @proposed_vcpis: Array of pointers for the new VCPI allocation. The
* VCPI structure itself is embedded into the corresponding
* &drm_dp_mst_port structure.
*/
struct drm_dp_vcpi **proposed_vcpis;
/**
* @payloads: Array of payloads.
*/
struct drm_dp_payload *payloads;
/**
* @payload_mask: Elements of @payloads actually in use. Since
* reallocation of active outputs isn't possible gaps can be created by
* disabling outputs out of order compared to how they've been enabled.
*/
unsigned long payload_mask;
/**
* @vcpi_mask: Similar to @payload_mask, but for @proposed_vcpis.
*/
unsigned long vcpi_mask;
/**
* @tx_waitq: Wait to queue stall for the tx worker.
*/
wait_queue_head_t tx_waitq;
/**
* @work: Probe work.
*/
struct work_struct work;
/**
* @tx_work: Sideband transmit worker. This can nest within the main
* @work worker for each transaction @work launches.
*/
struct work_struct tx_work;
/**
* @destroy_connector_list: List of to be destroyed connectors.
*/
struct list_head destroy_connector_list;
/**
* @destroy_connector_lock: Protects @connector_list.
*/
struct mutex destroy_connector_lock;
/**
* @destroy_connector_work: Work item to destroy connectors. Needed to
* avoid locking inversion.
*/
struct work_struct destroy_connector_work;
};