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// SPDX-License-Identifier: MIT
/*
* Copyright 2021 Advanced Micro Devices, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors: AMD
*
*/
#include "dc.h"
#include "inc/core_status.h"
#include "dpcd_defs.h"
#include "link_dp_dpia.h"
#include "link_hwss.h"
#include "dm_helpers.h"
#include "dmub/inc/dmub_cmd.h"
#include "link_dpcd.h"
#include "link_dp_training.h"
#include "dc_dmub_srv.h"
#define DC_LOGGER \
link->ctx->logger
/** @note Can remove once DP tunneling registers in upstream include/drm/drm_dp_helper.h */
/* DPCD DP Tunneling over USB4 */
#define DP_TUNNELING_CAPABILITIES_SUPPORT 0xe000d
#define DP_IN_ADAPTER_INFO 0xe000e
#define DP_USB4_DRIVER_ID 0xe000f
#define DP_USB4_ROUTER_TOPOLOGY_ID 0xe001b
enum dc_status dpcd_get_tunneling_device_data(struct dc_link *link)
{
enum dc_status status = DC_OK;
uint8_t dpcd_dp_tun_data[3] = {0};
uint8_t dpcd_topology_data[DPCD_USB4_TOPOLOGY_ID_LEN] = {0};
uint8_t i = 0;
status = core_link_read_dpcd(
link,
DP_TUNNELING_CAPABILITIES_SUPPORT,
dpcd_dp_tun_data,
sizeof(dpcd_dp_tun_data));
if (status != DC_OK)
goto err;
link->dpcd_caps.usb4_dp_tun_info.dp_tun_cap.raw =
dpcd_dp_tun_data[DP_TUNNELING_CAPABILITIES_SUPPORT - DP_TUNNELING_CAPABILITIES_SUPPORT];
if (link->dpcd_caps.usb4_dp_tun_info.dp_tun_cap.bits.dp_tunneling == false)
goto err;
link->dpcd_caps.usb4_dp_tun_info.dpia_info.raw =
dpcd_dp_tun_data[DP_IN_ADAPTER_INFO - DP_TUNNELING_CAPABILITIES_SUPPORT];
link->dpcd_caps.usb4_dp_tun_info.usb4_driver_id =
dpcd_dp_tun_data[DP_USB4_DRIVER_ID - DP_TUNNELING_CAPABILITIES_SUPPORT];
if (link->dpcd_caps.usb4_dp_tun_info.dp_tun_cap.bits.dpia_bw_alloc) {
status = core_link_read_dpcd(link, USB4_DRIVER_BW_CAPABILITY,
dpcd_dp_tun_data, 1);
if (status != DC_OK)
goto err;
link->dpcd_caps.usb4_dp_tun_info.driver_bw_cap.raw = dpcd_dp_tun_data[0];
}
DC_LOG_DEBUG("%s: Link[%d] DP tunneling support (RouterId=%d AdapterId=%d) "
"DPIA_BW_Alloc_support=%d "
"CM_BW_Alloc_support=%d ",
__func__, link->link_index,
link->dpcd_caps.usb4_dp_tun_info.usb4_driver_id,
link->dpcd_caps.usb4_dp_tun_info.dpia_info.bits.dpia_num,
link->dpcd_caps.usb4_dp_tun_info.dp_tun_cap.bits.dpia_bw_alloc,
link->dpcd_caps.usb4_dp_tun_info.driver_bw_cap.bits.driver_bw_alloc_support);
status = core_link_read_dpcd(
link,
DP_USB4_ROUTER_TOPOLOGY_ID,
dpcd_topology_data,
sizeof(dpcd_topology_data));
if (status != DC_OK)
goto err;
for (i = 0; i < DPCD_USB4_TOPOLOGY_ID_LEN; i++)
link->dpcd_caps.usb4_dp_tun_info.usb4_topology_id[i] = dpcd_topology_data[i];
err:
return status;
}
bool dpia_query_hpd_status(struct dc_link *link)
{
union dmub_rb_cmd cmd = {0};
struct dc_dmub_srv *dmub_srv = link->ctx->dmub_srv;
/* prepare QUERY_HPD command */
cmd.query_hpd.header.type = DMUB_CMD__QUERY_HPD_STATE;
cmd.query_hpd.header.payload_bytes = sizeof(cmd.query_hpd.data);
cmd.query_hpd.data.instance = link->link_id.enum_id - ENUM_ID_1;
cmd.query_hpd.data.ch_type = AUX_CHANNEL_DPIA;
/* Query dpia hpd status from dmub */
if (dc_wake_and_execute_dmub_cmd(dmub_srv->ctx, &cmd,
DM_DMUB_WAIT_TYPE_WAIT_WITH_REPLY) &&
cmd.query_hpd.data.status == AUX_RET_SUCCESS) {
DC_LOG_DEBUG("%s: for link(%d) dpia(%d) success, current_hpd_status(%d) new_hpd_status(%d)\n",
__func__,
link->link_index,
link->link_id.enum_id - ENUM_ID_1,
link->hpd_status,
cmd.query_hpd.data.result);
link->hpd_status = cmd.query_hpd.data.result;
} else {
DC_LOG_ERROR("%s: for link(%d) dpia(%d) failed with status(%d), current_hpd_status(%d) new_hpd_status(0)\n",
__func__,
link->link_index,
link->link_id.enum_id - ENUM_ID_1,
cmd.query_hpd.data.status,
link->hpd_status);
link->hpd_status = false;
}
return link->hpd_status;
}
void link_decide_dp_tunnel_settings(struct dc_stream_state *stream,
struct dc_tunnel_settings *dp_tunnel_setting)
{
struct dc_link *link = stream->link;
memset(dp_tunnel_setting, 0, sizeof(*dp_tunnel_setting));
if ((stream->signal == SIGNAL_TYPE_DISPLAY_PORT) || (stream->signal == SIGNAL_TYPE_DISPLAY_PORT_MST)) {
dp_tunnel_setting->should_enable_dp_tunneling =
link->dpcd_caps.usb4_dp_tun_info.dp_tun_cap.bits.dp_tunneling;
if (link->dpcd_caps.usb4_dp_tun_info.dp_tun_cap.bits.dpia_bw_alloc
&& link->dpcd_caps.usb4_dp_tun_info.driver_bw_cap.bits.driver_bw_alloc_support)
dp_tunnel_setting->should_use_dp_bw_allocation = true;
}
}
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