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958 lines
27 KiB
958 lines
27 KiB
/* |
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* Copyright © 2014 Red Hat. |
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* |
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* Permission to use, copy, modify, distribute, and sell this software and its |
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* documentation for any purpose is hereby granted without fee, provided that |
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* the above copyright notice appear in all copies and that both that copyright |
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* notice and this permission notice appear in supporting documentation, and |
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* that the name of the copyright holders not be used in advertising or |
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* publicity pertaining to distribution of the software without specific, |
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* written prior permission. The copyright holders make no representations |
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* about the suitability of this software for any purpose. It is provided "as |
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* is" without express or implied warranty. |
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* |
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, |
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO |
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* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR |
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, |
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE |
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* OF THIS SOFTWARE. |
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*/ |
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#ifndef _DRM_DP_MST_HELPER_H_ |
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#define _DRM_DP_MST_HELPER_H_ |
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#include <linux/types.h> |
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#include <drm/drm_dp_helper.h> |
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#include <drm/drm_atomic.h> |
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#if IS_ENABLED(CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS) |
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#include <linux/stackdepot.h> |
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#include <linux/timekeeping.h> |
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enum drm_dp_mst_topology_ref_type { |
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DRM_DP_MST_TOPOLOGY_REF_GET, |
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DRM_DP_MST_TOPOLOGY_REF_PUT, |
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}; |
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struct drm_dp_mst_topology_ref_history { |
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struct drm_dp_mst_topology_ref_entry { |
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enum drm_dp_mst_topology_ref_type type; |
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int count; |
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ktime_t ts_nsec; |
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depot_stack_handle_t backtrace; |
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} *entries; |
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int len; |
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}; |
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#endif /* IS_ENABLED(CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS) */ |
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struct drm_dp_mst_branch; |
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/** |
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* struct drm_dp_vcpi - Virtual Channel Payload Identifier |
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* @vcpi: Virtual channel ID. |
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* @pbn: Payload Bandwidth Number for this channel |
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* @aligned_pbn: PBN aligned with slot size |
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* @num_slots: number of slots for this PBN |
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*/ |
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struct drm_dp_vcpi { |
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int vcpi; |
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int pbn; |
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int aligned_pbn; |
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int num_slots; |
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}; |
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/** |
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* struct drm_dp_mst_port - MST port |
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* @port_num: port number |
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* @input: if this port is an input port. Protected by |
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* &drm_dp_mst_topology_mgr.base.lock. |
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* @mcs: message capability status - DP 1.2 spec. Protected by |
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* &drm_dp_mst_topology_mgr.base.lock. |
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* @ddps: DisplayPort Device Plug Status - DP 1.2. Protected by |
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* &drm_dp_mst_topology_mgr.base.lock. |
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* @pdt: Peer Device Type. Protected by |
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* &drm_dp_mst_topology_mgr.base.lock. |
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* @ldps: Legacy Device Plug Status. Protected by |
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* &drm_dp_mst_topology_mgr.base.lock. |
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* @dpcd_rev: DPCD revision of device on this port. Protected by |
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* &drm_dp_mst_topology_mgr.base.lock. |
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* @num_sdp_streams: Number of simultaneous streams. Protected by |
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* &drm_dp_mst_topology_mgr.base.lock. |
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* @num_sdp_stream_sinks: Number of stream sinks. Protected by |
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* &drm_dp_mst_topology_mgr.base.lock. |
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* @full_pbn: Max possible bandwidth for this port. Protected by |
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* &drm_dp_mst_topology_mgr.base.lock. |
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* @next: link to next port on this branch device |
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* @aux: i2c aux transport to talk to device connected to this port, protected |
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* by &drm_dp_mst_topology_mgr.base.lock. |
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* @parent: branch device parent of this port |
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* @vcpi: Virtual Channel Payload info for this port. |
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* @connector: DRM connector this port is connected to. Protected by |
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* &drm_dp_mst_topology_mgr.base.lock. |
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* @mgr: topology manager this port lives under. |
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* |
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* This structure represents an MST port endpoint on a device somewhere |
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* in the MST topology. |
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*/ |
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struct drm_dp_mst_port { |
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/** |
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* @topology_kref: refcount for this port's lifetime in the topology, |
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* only the DP MST helpers should need to touch this |
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*/ |
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struct kref topology_kref; |
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/** |
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* @malloc_kref: refcount for the memory allocation containing this |
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* structure. See drm_dp_mst_get_port_malloc() and |
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* drm_dp_mst_put_port_malloc(). |
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*/ |
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struct kref malloc_kref; |
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#if IS_ENABLED(CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS) |
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/** |
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* @topology_ref_history: A history of each topology |
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* reference/dereference. See CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS. |
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*/ |
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struct drm_dp_mst_topology_ref_history topology_ref_history; |
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#endif |
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u8 port_num; |
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bool input; |
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bool mcs; |
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bool ddps; |
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u8 pdt; |
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bool ldps; |
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u8 dpcd_rev; |
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u8 num_sdp_streams; |
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u8 num_sdp_stream_sinks; |
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uint16_t full_pbn; |
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struct list_head next; |
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/** |
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* @mstb: the branch device connected to this port, if there is one. |
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* This should be considered protected for reading by |
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* &drm_dp_mst_topology_mgr.lock. There are two exceptions to this: |
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* &drm_dp_mst_topology_mgr.up_req_work and |
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* &drm_dp_mst_topology_mgr.work, which do not grab |
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* &drm_dp_mst_topology_mgr.lock during reads but are the only |
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* updaters of this list and are protected from writing concurrently |
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* by &drm_dp_mst_topology_mgr.probe_lock. |
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*/ |
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struct drm_dp_mst_branch *mstb; |
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struct drm_dp_aux aux; /* i2c bus for this port? */ |
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struct drm_dp_mst_branch *parent; |
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struct drm_dp_vcpi vcpi; |
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struct drm_connector *connector; |
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struct drm_dp_mst_topology_mgr *mgr; |
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/** |
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* @cached_edid: for DP logical ports - make tiling work by ensuring |
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* that the EDID for all connectors is read immediately. |
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*/ |
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struct edid *cached_edid; |
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/** |
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* @has_audio: Tracks whether the sink connector to this port is |
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* audio-capable. |
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*/ |
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bool has_audio; |
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/** |
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* @fec_capable: bool indicating if FEC can be supported up to that |
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* point in the MST topology. |
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*/ |
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bool fec_capable; |
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}; |
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/* sideband msg header - not bit struct */ |
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struct drm_dp_sideband_msg_hdr { |
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u8 lct; |
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u8 lcr; |
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u8 rad[8]; |
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bool broadcast; |
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bool path_msg; |
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u8 msg_len; |
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bool somt; |
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bool eomt; |
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bool seqno; |
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}; |
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struct drm_dp_sideband_msg_rx { |
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u8 chunk[48]; |
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u8 msg[256]; |
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u8 curchunk_len; |
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u8 curchunk_idx; /* chunk we are parsing now */ |
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u8 curchunk_hdrlen; |
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u8 curlen; /* total length of the msg */ |
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bool have_somt; |
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bool have_eomt; |
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struct drm_dp_sideband_msg_hdr initial_hdr; |
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}; |
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/** |
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* struct drm_dp_mst_branch - MST branch device. |
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* @rad: Relative Address to talk to this branch device. |
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* @lct: Link count total to talk to this branch device. |
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* @num_ports: number of ports on the branch. |
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* @port_parent: pointer to the port parent, NULL if toplevel. |
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* @mgr: topology manager for this branch device. |
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* @link_address_sent: if a link address message has been sent to this device yet. |
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* @guid: guid for DP 1.2 branch device. port under this branch can be |
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* identified by port #. |
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* |
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* This structure represents an MST branch device, there is one |
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* primary branch device at the root, along with any other branches connected |
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* to downstream port of parent branches. |
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*/ |
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struct drm_dp_mst_branch { |
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/** |
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* @topology_kref: refcount for this branch device's lifetime in the |
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* topology, only the DP MST helpers should need to touch this |
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*/ |
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struct kref topology_kref; |
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/** |
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* @malloc_kref: refcount for the memory allocation containing this |
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* structure. See drm_dp_mst_get_mstb_malloc() and |
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* drm_dp_mst_put_mstb_malloc(). |
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*/ |
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struct kref malloc_kref; |
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#if IS_ENABLED(CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS) |
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/** |
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* @topology_ref_history: A history of each topology |
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* reference/dereference. See CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS. |
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*/ |
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struct drm_dp_mst_topology_ref_history topology_ref_history; |
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#endif |
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/** |
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* @destroy_next: linked-list entry used by |
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* drm_dp_delayed_destroy_work() |
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*/ |
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struct list_head destroy_next; |
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u8 rad[8]; |
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u8 lct; |
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int num_ports; |
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/** |
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* @ports: the list of ports on this branch device. This should be |
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* considered protected for reading by &drm_dp_mst_topology_mgr.lock. |
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* There are two exceptions to this: |
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* &drm_dp_mst_topology_mgr.up_req_work and |
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* &drm_dp_mst_topology_mgr.work, which do not grab |
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* &drm_dp_mst_topology_mgr.lock during reads but are the only |
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* updaters of this list and are protected from updating the list |
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* concurrently by @drm_dp_mst_topology_mgr.probe_lock |
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*/ |
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struct list_head ports; |
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struct drm_dp_mst_port *port_parent; |
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struct drm_dp_mst_topology_mgr *mgr; |
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bool link_address_sent; |
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/* global unique identifier to identify branch devices */ |
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u8 guid[16]; |
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}; |
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struct drm_dp_nak_reply { |
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u8 guid[16]; |
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u8 reason; |
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u8 nak_data; |
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}; |
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struct drm_dp_link_address_ack_reply { |
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u8 guid[16]; |
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u8 nports; |
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struct drm_dp_link_addr_reply_port { |
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bool input_port; |
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u8 peer_device_type; |
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u8 port_number; |
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bool mcs; |
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bool ddps; |
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bool legacy_device_plug_status; |
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u8 dpcd_revision; |
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u8 peer_guid[16]; |
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u8 num_sdp_streams; |
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u8 num_sdp_stream_sinks; |
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} ports[16]; |
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}; |
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struct drm_dp_remote_dpcd_read_ack_reply { |
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u8 port_number; |
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u8 num_bytes; |
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u8 bytes[255]; |
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}; |
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struct drm_dp_remote_dpcd_write_ack_reply { |
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u8 port_number; |
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}; |
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struct drm_dp_remote_dpcd_write_nak_reply { |
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u8 port_number; |
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u8 reason; |
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u8 bytes_written_before_failure; |
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}; |
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struct drm_dp_remote_i2c_read_ack_reply { |
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u8 port_number; |
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u8 num_bytes; |
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u8 bytes[255]; |
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}; |
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struct drm_dp_remote_i2c_read_nak_reply { |
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u8 port_number; |
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u8 nak_reason; |
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u8 i2c_nak_transaction; |
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}; |
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struct drm_dp_remote_i2c_write_ack_reply { |
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u8 port_number; |
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}; |
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struct drm_dp_query_stream_enc_status_ack_reply { |
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/* Bit[23:16]- Stream Id */ |
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u8 stream_id; |
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/* Bit[15]- Signed */ |
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bool reply_signed; |
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/* Bit[10:8]- Stream Output Sink Type */ |
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bool unauthorizable_device_present; |
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bool legacy_device_present; |
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bool query_capable_device_present; |
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/* Bit[12:11]- Stream Output CP Type */ |
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bool hdcp_1x_device_present; |
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bool hdcp_2x_device_present; |
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/* Bit[4]- Stream Authentication */ |
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bool auth_completed; |
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/* Bit[3]- Stream Encryption */ |
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bool encryption_enabled; |
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/* Bit[2]- Stream Repeater Function Present */ |
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bool repeater_present; |
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/* Bit[1:0]- Stream State */ |
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u8 state; |
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}; |
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#define DRM_DP_MAX_SDP_STREAMS 16 |
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struct drm_dp_allocate_payload { |
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u8 port_number; |
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u8 number_sdp_streams; |
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u8 vcpi; |
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u16 pbn; |
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u8 sdp_stream_sink[DRM_DP_MAX_SDP_STREAMS]; |
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}; |
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struct drm_dp_allocate_payload_ack_reply { |
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u8 port_number; |
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u8 vcpi; |
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u16 allocated_pbn; |
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}; |
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struct drm_dp_connection_status_notify { |
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u8 guid[16]; |
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u8 port_number; |
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bool legacy_device_plug_status; |
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bool displayport_device_plug_status; |
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bool message_capability_status; |
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bool input_port; |
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u8 peer_device_type; |
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}; |
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struct drm_dp_remote_dpcd_read { |
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u8 port_number; |
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u32 dpcd_address; |
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u8 num_bytes; |
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}; |
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struct drm_dp_remote_dpcd_write { |
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u8 port_number; |
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u32 dpcd_address; |
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u8 num_bytes; |
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u8 *bytes; |
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}; |
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#define DP_REMOTE_I2C_READ_MAX_TRANSACTIONS 4 |
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struct drm_dp_remote_i2c_read { |
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u8 num_transactions; |
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u8 port_number; |
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struct drm_dp_remote_i2c_read_tx { |
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u8 i2c_dev_id; |
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u8 num_bytes; |
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u8 *bytes; |
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u8 no_stop_bit; |
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u8 i2c_transaction_delay; |
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} transactions[DP_REMOTE_I2C_READ_MAX_TRANSACTIONS]; |
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u8 read_i2c_device_id; |
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u8 num_bytes_read; |
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}; |
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struct drm_dp_remote_i2c_write { |
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u8 port_number; |
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u8 write_i2c_device_id; |
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u8 num_bytes; |
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u8 *bytes; |
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}; |
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struct drm_dp_query_stream_enc_status { |
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u8 stream_id; |
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u8 client_id[7]; /* 56-bit nonce */ |
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u8 stream_event; |
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bool valid_stream_event; |
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u8 stream_behavior; |
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u8 valid_stream_behavior; |
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}; |
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/* this covers ENUM_RESOURCES, POWER_DOWN_PHY, POWER_UP_PHY */ |
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struct drm_dp_port_number_req { |
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u8 port_number; |
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}; |
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struct drm_dp_enum_path_resources_ack_reply { |
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u8 port_number; |
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bool fec_capable; |
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u16 full_payload_bw_number; |
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u16 avail_payload_bw_number; |
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}; |
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/* covers POWER_DOWN_PHY, POWER_UP_PHY */ |
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struct drm_dp_port_number_rep { |
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u8 port_number; |
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}; |
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struct drm_dp_query_payload { |
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u8 port_number; |
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u8 vcpi; |
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}; |
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struct drm_dp_resource_status_notify { |
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u8 port_number; |
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u8 guid[16]; |
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u16 available_pbn; |
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}; |
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struct drm_dp_query_payload_ack_reply { |
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u8 port_number; |
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u16 allocated_pbn; |
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}; |
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struct drm_dp_sideband_msg_req_body { |
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u8 req_type; |
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union ack_req { |
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struct drm_dp_connection_status_notify conn_stat; |
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struct drm_dp_port_number_req port_num; |
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struct drm_dp_resource_status_notify resource_stat; |
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struct drm_dp_query_payload query_payload; |
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struct drm_dp_allocate_payload allocate_payload; |
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struct drm_dp_remote_dpcd_read dpcd_read; |
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struct drm_dp_remote_dpcd_write dpcd_write; |
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struct drm_dp_remote_i2c_read i2c_read; |
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struct drm_dp_remote_i2c_write i2c_write; |
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struct drm_dp_query_stream_enc_status enc_status; |
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} u; |
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}; |
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struct drm_dp_sideband_msg_reply_body { |
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u8 reply_type; |
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u8 req_type; |
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union ack_replies { |
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struct drm_dp_nak_reply nak; |
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struct drm_dp_link_address_ack_reply link_addr; |
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struct drm_dp_port_number_rep port_number; |
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struct drm_dp_enum_path_resources_ack_reply path_resources; |
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struct drm_dp_allocate_payload_ack_reply allocate_payload; |
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struct drm_dp_query_payload_ack_reply query_payload; |
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struct drm_dp_remote_dpcd_read_ack_reply remote_dpcd_read_ack; |
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struct drm_dp_remote_dpcd_write_ack_reply remote_dpcd_write_ack; |
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struct drm_dp_remote_dpcd_write_nak_reply remote_dpcd_write_nack; |
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struct drm_dp_remote_i2c_read_ack_reply remote_i2c_read_ack; |
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struct drm_dp_remote_i2c_read_nak_reply remote_i2c_read_nack; |
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struct drm_dp_remote_i2c_write_ack_reply remote_i2c_write_ack; |
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struct drm_dp_query_stream_enc_status_ack_reply enc_status; |
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} u; |
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}; |
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/* msg is queued to be put into a slot */ |
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#define DRM_DP_SIDEBAND_TX_QUEUED 0 |
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/* msg has started transmitting on a slot - still on msgq */ |
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#define DRM_DP_SIDEBAND_TX_START_SEND 1 |
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/* msg has finished transmitting on a slot - removed from msgq only in slot */ |
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#define DRM_DP_SIDEBAND_TX_SENT 2 |
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/* msg has received a response - removed from slot */ |
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#define DRM_DP_SIDEBAND_TX_RX 3 |
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#define DRM_DP_SIDEBAND_TX_TIMEOUT 4 |
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struct drm_dp_sideband_msg_tx { |
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u8 msg[256]; |
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u8 chunk[48]; |
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u8 cur_offset; |
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u8 cur_len; |
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struct drm_dp_mst_branch *dst; |
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struct list_head next; |
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int seqno; |
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int state; |
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bool path_msg; |
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struct drm_dp_sideband_msg_reply_body reply; |
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}; |
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/* sideband msg handler */ |
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struct drm_dp_mst_topology_mgr; |
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struct drm_dp_mst_topology_cbs { |
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/* create a connector for a port */ |
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struct drm_connector *(*add_connector)(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, const char *path); |
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/* |
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* Checks for any pending MST interrupts, passing them to MST core for |
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* processing, the same way an HPD IRQ pulse handler would do this. |
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* If provided MST core calls this callback from a poll-waiting loop |
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* when waiting for MST down message replies. The driver is expected |
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* to guard against a race between this callback and the driver's HPD |
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* IRQ pulse handler. |
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*/ |
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void (*poll_hpd_irq)(struct drm_dp_mst_topology_mgr *mgr); |
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}; |
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#define DP_MAX_PAYLOAD (sizeof(unsigned long) * 8) |
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#define DP_PAYLOAD_LOCAL 1 |
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#define DP_PAYLOAD_REMOTE 2 |
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#define DP_PAYLOAD_DELETE_LOCAL 3 |
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struct drm_dp_payload { |
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int payload_state; |
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int start_slot; |
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int num_slots; |
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int vcpi; |
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}; |
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#define to_dp_mst_topology_state(x) container_of(x, struct drm_dp_mst_topology_state, base) |
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struct drm_dp_vcpi_allocation { |
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struct drm_dp_mst_port *port; |
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int vcpi; |
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int pbn; |
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bool dsc_enabled; |
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struct list_head next; |
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}; |
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struct drm_dp_mst_topology_state { |
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struct drm_private_state base; |
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struct list_head vcpis; |
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struct drm_dp_mst_topology_mgr *mgr; |
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}; |
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|
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#define to_dp_mst_topology_mgr(x) container_of(x, struct drm_dp_mst_topology_mgr, base) |
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|
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/** |
|
* struct drm_dp_mst_topology_mgr - DisplayPort MST manager |
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* |
|
* This struct represents the toplevel displayport MST topology manager. |
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* There should be one instance of this for every MST capable DP connector |
|
* on the GPU. |
|
*/ |
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struct drm_dp_mst_topology_mgr { |
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/** |
|
* @base: Base private object for atomic |
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*/ |
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struct drm_private_obj base; |
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|
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/** |
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* @dev: device pointer for adding i2c devices etc. |
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*/ |
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struct drm_device *dev; |
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/** |
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* @cbs: callbacks for connector addition and destruction. |
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*/ |
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const struct drm_dp_mst_topology_cbs *cbs; |
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/** |
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* @max_dpcd_transaction_bytes: maximum number of bytes to read/write |
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* in one go. |
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*/ |
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int max_dpcd_transaction_bytes; |
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/** |
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* @aux: AUX channel for the DP MST connector this topolgy mgr is |
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* controlling. |
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*/ |
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struct drm_dp_aux *aux; |
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/** |
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* @max_payloads: maximum number of payloads the GPU can generate. |
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*/ |
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int max_payloads; |
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/** |
|
* @conn_base_id: DRM connector ID this mgr is connected to. Only used |
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* to build the MST connector path value. |
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*/ |
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int conn_base_id; |
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|
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/** |
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* @up_req_recv: Message receiver state for up requests. |
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*/ |
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struct drm_dp_sideband_msg_rx up_req_recv; |
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|
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/** |
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* @down_rep_recv: Message receiver state for replies to down |
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* requests. |
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*/ |
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struct drm_dp_sideband_msg_rx down_rep_recv; |
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/** |
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* @lock: protects @mst_state, @mst_primary, @dpcd, and |
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* @payload_id_table_cleared. |
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*/ |
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struct mutex lock; |
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/** |
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* @probe_lock: Prevents @work and @up_req_work, the only writers of |
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* &drm_dp_mst_port.mstb and &drm_dp_mst_branch.ports, from racing |
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* while they update the topology. |
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*/ |
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struct mutex probe_lock; |
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/** |
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* @mst_state: If this manager is enabled for an MST capable port. False |
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* if no MST sink/branch devices is connected. |
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*/ |
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bool mst_state : 1; |
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/** |
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* @payload_id_table_cleared: Whether or not we've cleared the payload |
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* ID table for @mst_primary. Protected by @lock. |
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*/ |
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bool payload_id_table_cleared : 1; |
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/** |
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* @mst_primary: Pointer to the primary/first branch device. |
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*/ |
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struct drm_dp_mst_branch *mst_primary; |
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/** |
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* @dpcd: Cache of DPCD for primary port. |
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*/ |
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u8 dpcd[DP_RECEIVER_CAP_SIZE]; |
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/** |
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* @sink_count: Sink count from DEVICE_SERVICE_IRQ_VECTOR_ESI0. |
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*/ |
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u8 sink_count; |
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/** |
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* @pbn_div: PBN to slots divisor. |
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*/ |
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int pbn_div; |
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|
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/** |
|
* @funcs: Atomic helper callbacks |
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*/ |
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const struct drm_private_state_funcs *funcs; |
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|
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/** |
|
* @qlock: protects @tx_msg_downq and &drm_dp_sideband_msg_tx.state |
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*/ |
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struct mutex qlock; |
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|
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/** |
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* @tx_msg_downq: List of pending down requests |
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*/ |
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struct list_head tx_msg_downq; |
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|
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/** |
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* @payload_lock: Protect payload information. |
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*/ |
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struct mutex payload_lock; |
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/** |
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* @proposed_vcpis: Array of pointers for the new VCPI allocation. The |
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* VCPI structure itself is &drm_dp_mst_port.vcpi, and the size of |
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* this array is determined by @max_payloads. |
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*/ |
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struct drm_dp_vcpi **proposed_vcpis; |
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/** |
|
* @payloads: Array of payloads. The size of this array is determined |
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* by @max_payloads. |
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*/ |
|
struct drm_dp_payload *payloads; |
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/** |
|
* @payload_mask: Elements of @payloads actually in use. Since |
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* reallocation of active outputs isn't possible gaps can be created by |
|
* disabling outputs out of order compared to how they've been enabled. |
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*/ |
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unsigned long payload_mask; |
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/** |
|
* @vcpi_mask: Similar to @payload_mask, but for @proposed_vcpis. |
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*/ |
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unsigned long vcpi_mask; |
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|
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/** |
|
* @tx_waitq: Wait to queue stall for the tx worker. |
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*/ |
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wait_queue_head_t tx_waitq; |
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/** |
|
* @work: Probe work. |
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*/ |
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struct work_struct work; |
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/** |
|
* @tx_work: Sideband transmit worker. This can nest within the main |
|
* @work worker for each transaction @work launches. |
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*/ |
|
struct work_struct tx_work; |
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|
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/** |
|
* @destroy_port_list: List of to be destroyed connectors. |
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*/ |
|
struct list_head destroy_port_list; |
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/** |
|
* @destroy_branch_device_list: List of to be destroyed branch |
|
* devices. |
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*/ |
|
struct list_head destroy_branch_device_list; |
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/** |
|
* @delayed_destroy_lock: Protects @destroy_port_list and |
|
* @destroy_branch_device_list. |
|
*/ |
|
struct mutex delayed_destroy_lock; |
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|
|
/** |
|
* @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; |
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|
|
/** |
|
* @delayed_destroy_work: Work item to destroy MST port and branch |
|
* devices, needed to avoid locking inversion. |
|
*/ |
|
struct work_struct delayed_destroy_work; |
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|
|
/** |
|
* @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, |
|
struct drm_device *dev, struct drm_dp_aux *aux, |
|
int max_dpcd_transaction_bytes, |
|
int max_payloads, int conn_base_id); |
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|
|
void drm_dp_mst_topology_mgr_destroy(struct drm_dp_mst_topology_mgr *mgr); |
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|
|
bool drm_dp_read_mst_cap(struct drm_dp_aux *aux, const u8 dpcd[DP_RECEIVER_CAP_SIZE]); |
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int drm_dp_mst_topology_mgr_set_mst(struct drm_dp_mst_topology_mgr *mgr, bool mst_state); |
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|
|
int drm_dp_mst_hpd_irq(struct drm_dp_mst_topology_mgr *mgr, u8 *esi, bool *handled); |
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|
|
|
|
int |
|
drm_dp_mst_detect_port(struct drm_connector *connector, |
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struct drm_modeset_acquire_ctx *ctx, |
|
struct drm_dp_mst_topology_mgr *mgr, |
|
struct drm_dp_mst_port *port); |
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|
|
struct edid *drm_dp_mst_get_edid(struct drm_connector *connector, struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port); |
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|
|
int drm_dp_get_vc_payload_bw(int link_rate, int link_lane_count); |
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|
|
int drm_dp_calc_pbn_mode(int clock, int bpp, bool dsc); |
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|
|
bool drm_dp_mst_allocate_vcpi(struct drm_dp_mst_topology_mgr *mgr, |
|
struct drm_dp_mst_port *port, int pbn, int slots); |
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|
|
int drm_dp_mst_get_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port); |
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|
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|
|
void drm_dp_mst_reset_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port); |
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|
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|
|
void drm_dp_mst_deallocate_vcpi(struct drm_dp_mst_topology_mgr *mgr, |
|
struct drm_dp_mst_port *port); |
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|
|
|
|
int drm_dp_find_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, |
|
int pbn); |
|
|
|
|
|
int drm_dp_update_payload_part1(struct drm_dp_mst_topology_mgr *mgr); |
|
|
|
|
|
int drm_dp_update_payload_part2(struct drm_dp_mst_topology_mgr *mgr); |
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|
|
int drm_dp_check_act_status(struct drm_dp_mst_topology_mgr *mgr); |
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|
|
void drm_dp_mst_dump_topology(struct seq_file *m, |
|
struct drm_dp_mst_topology_mgr *mgr); |
|
|
|
void drm_dp_mst_topology_mgr_suspend(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 __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); |
|
|
|
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); |
|
|
|
struct drm_dp_aux *drm_dp_mst_dsc_aux_for_port(struct drm_dp_mst_port *port); |
|
|
|
extern const struct drm_private_state_funcs drm_dp_mst_topology_state_funcs; |
|
|
|
/** |
|
* __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]; |
|
|
|
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
|
|
|