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/*
* Copyright (c) 2019, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
/*
* Copyright � 2014 Red Hat.
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting documentation, and
* that the name of the copyright holders not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no representations
* about the suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#ifndef _MSM_DP_MST_SIM_H_
#define _MSM_DP_MST_SIM_H_
#include <linux/types.h>
#include <drm/drmP.h>
#include <drm/drm_dp_helper.h>
/**
* struct msm_dp_mst_sim_port - MST port configuration
* @input: if this port is an input port.
* @mcs: message capability status - DP 1.2 spec.
* @ddps: DisplayPort Device Plug Status - DP 1.2
* @pdt: Peer Device Type
* @ldps: Legacy Device Plug Status
* @dpcd_rev: DPCD revision of device on this port
* @peer_guid: Peer GUID on this port
* @num_sdp_streams: Number of simultaneous streams
* @num_sdp_stream_sinks: Number of stream sinks
* @full_pbn: Full bandwidth for this port.
* @avail_pbn: Available bandwidth for this port.
* @edid: EDID data on this port.
* @edid_size: size of EDID data on this port.
*/
struct msm_dp_mst_sim_port {
bool input;
bool mcs;
bool ddps;
u8 pdt;
bool ldps;
u8 dpcd_rev;
u8 peer_guid[16];
u8 num_sdp_streams;
u8 num_sdp_stream_sinks;
u16 full_pbn;
u16 avail_pbn;
const u8 *edid;
u32 edid_size;
};
/**
* struct msm_dp_mst_sim_cfg - MST simulator configuration
* @host_dev: host device pointer used in callback functions
* @guid: GUID of the top MST branch.
*/
struct msm_dp_mst_sim_cfg {
void *host_dev;
u8 guid[16];
/**
* @host_hpd_irq:
*
* This callback is invoked whenever simulator need to
* notify host that there is a HPD_IRQ.
* @host_dev: host_dev pointer
*/
void (*host_hpd_irq)(void *host_dev);
/**
* @host_req:
*
* This callback is invoked whenever simulator's reply is ready
* to response downstream request. Host can use this function
* to replace the reply generated by simulator.
* @host_dev: host_dev pointer
* @in: pointer of downstream request buffer to simulator
* @in_size: size of downstream request buffer to simulator
* @out: pointer of downstream reply from simulator
* @out_size: pointer of size of downstream reply from simulator
*
* This callback is optional.
*/
void (*host_req)(void *host_dev, const u8 *in, int in_size,
u8 *out, int *out_size);
};
/**
* msm_dp_mst_sim_create - Create simulator context
* @cfg: see msm_dp_mst_sim_cfg
* @mst_sim_context: simulator context returned
* return: 0 if successful
*/
int msm_dp_mst_sim_create(const struct msm_dp_mst_sim_cfg *cfg,
void **mst_sim_context);
/**
* msm_dp_mst_sim_destroy - Destroy simulator context
* @mst_sim_context: simulator context
* return: 0 if successful
*/
int msm_dp_mst_sim_destroy(void *mst_sim_context);
/**
* msm_dp_mst_sim_transfer - Send aux message to simulator context
* @mst_sim_context: simulator context
* @msg: aux message
* return: 0 if successful
*/
int msm_dp_mst_sim_transfer(void *mst_sim_context, struct drm_dp_aux_msg *msg);
/**
* msm_dp_mst_sim_update - Update port configuration
* @mst_sim_context: simulator context
* @port_num: number of ports
* @ports: ports configuration
* return: 0 if successful
*/
int msm_dp_mst_sim_update(void *mst_sim_context, u32 port_num,
struct msm_dp_mst_sim_port *ports);
#endif /* _MSM_DP_MST_SIM_H_ */
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