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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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![Nikola Cornij](/assets/img/avatar_default.png)
[why] Link rate in kHz is what is eventually required to calculate the link bandwidth, which makes kHz a more generic unit. This should also make forward-compatibility with new DP standards easier. [how] - Replace 'link rate DPCD code' with 'link rate in kHz' when used with drm_dp_mst_topology_mgr_init() - Add/remove related DPCD code conversion from/to kHz where applicable Signed-off-by: Nikola Cornij <nikola.cornij@amd.com> Acked-by: Jani Nikula <jani.nikula@intel.com> Reviewed-by: Lyude Paul <lyude@redhat.com> Signed-off-by: Lyude Paul <lyude@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/20210512210011.8425-2-nikola.cornij@amd.com
969 lines
28 KiB
C
969 lines
28 KiB
C
/*
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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;
|
|
|
|
struct drm_dp_query_stream_enc_status_ack_reply enc_status;
|
|
} u;
|
|
};
|
|
|
|
/* msg is queued to be put into a slot */
|
|
#define DRM_DP_SIDEBAND_TX_QUEUED 0
|
|
/* msg has started transmitting on a slot - still on msgq */
|
|
#define DRM_DP_SIDEBAND_TX_START_SEND 1
|
|
/* msg has finished transmitting on a slot - removed from msgq only in slot */
|
|
#define DRM_DP_SIDEBAND_TX_SENT 2
|
|
/* msg has received a response - removed from slot */
|
|
#define DRM_DP_SIDEBAND_TX_RX 3
|
|
#define DRM_DP_SIDEBAND_TX_TIMEOUT 4
|
|
|
|
struct drm_dp_sideband_msg_tx {
|
|
u8 msg[256];
|
|
u8 chunk[48];
|
|
u8 cur_offset;
|
|
u8 cur_len;
|
|
struct drm_dp_mst_branch *dst;
|
|
struct list_head next;
|
|
int seqno;
|
|
int state;
|
|
bool path_msg;
|
|
struct drm_dp_sideband_msg_reply_body reply;
|
|
};
|
|
|
|
/* sideband msg handler */
|
|
struct drm_dp_mst_topology_mgr;
|
|
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);
|
|
/*
|
|
* 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)
|
|
|
|
#define DP_PAYLOAD_LOCAL 1
|
|
#define DP_PAYLOAD_REMOTE 2
|
|
#define DP_PAYLOAD_DELETE_LOCAL 3
|
|
|
|
struct drm_dp_payload {
|
|
int payload_state;
|
|
int start_slot;
|
|
int num_slots;
|
|
int vcpi;
|
|
};
|
|
|
|
#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;
|
|
struct list_head vcpis;
|
|
struct drm_dp_mst_topology_mgr *mgr;
|
|
};
|
|
|
|
#define to_dp_mst_topology_mgr(x) container_of(x, struct drm_dp_mst_topology_mgr, base)
|
|
|
|
/**
|
|
* struct drm_dp_mst_topology_mgr - DisplayPort MST manager
|
|
*
|
|
* 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 {
|
|
/**
|
|
* @base: Base private object for atomic
|
|
*/
|
|
struct drm_private_obj base;
|
|
|
|
/**
|
|
* @dev: device pointer for adding i2c devices etc.
|
|
*/
|
|
struct drm_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;
|
|
/**
|
|
* @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;
|
|
/**
|
|
* @max_lane_count: maximum number of lanes the GPU can drive.
|
|
*/
|
|
int max_lane_count;
|
|
/**
|
|
* @max_link_rate: maximum link rate per lane GPU can output, in kHz.
|
|
*/
|
|
int max_link_rate;
|
|
/**
|
|
* @conn_base_id: DRM connector ID this mgr is connected to. Only used
|
|
* to build the MST connector path value.
|
|
*/
|
|
int conn_base_id;
|
|
|
|
/**
|
|
* @up_req_recv: Message receiver state for up requests.
|
|
*/
|
|
struct drm_dp_sideband_msg_rx up_req_recv;
|
|
|
|
/**
|
|
* @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 : 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.
|
|
*/
|
|
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;
|
|
|
|
/**
|
|
* @funcs: Atomic helper callbacks
|
|
*/
|
|
const struct drm_private_state_funcs *funcs;
|
|
|
|
/**
|
|
* @qlock: protects @tx_msg_downq and &drm_dp_sideband_msg_tx.state
|
|
*/
|
|
struct mutex qlock;
|
|
|
|
/**
|
|
* @tx_msg_downq: List of pending down requests
|
|
*/
|
|
struct list_head tx_msg_downq;
|
|
|
|
/**
|
|
* @payload_lock: Protect payload information.
|
|
*/
|
|
struct mutex payload_lock;
|
|
/**
|
|
* @proposed_vcpis: Array of pointers for the new VCPI allocation. The
|
|
* 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. The size of this array is determined
|
|
* by @max_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_port_list: List of to be destroyed connectors.
|
|
*/
|
|
struct list_head destroy_port_list;
|
|
/**
|
|
* @destroy_branch_device_list: List of to be destroyed branch
|
|
* devices.
|
|
*/
|
|
struct list_head destroy_branch_device_list;
|
|
/**
|
|
* @delayed_destroy_lock: Protects @destroy_port_list and
|
|
* @destroy_branch_device_list.
|
|
*/
|
|
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,
|
|
struct drm_device *dev, struct drm_dp_aux *aux,
|
|
int max_dpcd_transaction_bytes,
|
|
int max_payloads,
|
|
int max_lane_count, int max_link_rate,
|
|
int conn_base_id);
|
|
|
|
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);
|
|
|
|
|
|
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(const struct drm_dp_mst_topology_mgr *mgr,
|
|
int link_rate, int link_lane_count);
|
|
|
|
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);
|
|
|
|
int drm_dp_mst_get_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port);
|
|
|
|
|
|
void drm_dp_mst_reset_vcpi_slots(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port);
|
|
|
|
|
|
void drm_dp_mst_deallocate_vcpi(struct drm_dp_mst_topology_mgr *mgr,
|
|
struct drm_dp_mst_port *port);
|
|
|
|
|
|
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);
|
|
|
|
int drm_dp_check_act_status(struct drm_dp_mst_topology_mgr *mgr);
|
|
|
|
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.
|
|
*/
|
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#define for_each_old_mst_mgr_in_state(__state, mgr, old_state, __i) \
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for ((__i) = 0; (__i) < (__state)->num_private_objs; (__i)++) \
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for_each_if(__drm_dp_mst_state_iter_get((__state), &(mgr), &(old_state), NULL, (__i)))
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/**
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* for_each_new_mst_mgr_in_state - iterate over all DP MST topology managers
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* in an atomic update
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* @__state: &struct drm_atomic_state pointer
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* @mgr: &struct drm_dp_mst_topology_mgr iteration cursor
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* @new_state: &struct drm_dp_mst_topology_state iteration cursor for the new
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* state
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* @__i: int iteration cursor, for macro-internal use
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*
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* This iterates over all DRM DP MST topology managers in an atomic update,
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* tracking only the new state. This is useful in enable functions, where we
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* need the new state the hardware should be in when the atomic commit
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* operation has completed.
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*/
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#define for_each_new_mst_mgr_in_state(__state, mgr, new_state, __i) \
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for ((__i) = 0; (__i) < (__state)->num_private_objs; (__i)++) \
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for_each_if(__drm_dp_mst_state_iter_get((__state), &(mgr), NULL, &(new_state), (__i)))
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#endif
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