/* * Copyright 2022 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 *
*/
#ifndef __DC_LINK_H__ #define __DC_LINK_H__
/* FILE POLICY AND INTENDED USAGE: * * This header defines link component function interfaces aka link_service. * link_service provides the only entry point to link functions with function * pointer style. This header is strictly private in dc and should never be * included by DM because it exposes too much dc detail including all dc * private types defined in core_types.h. Otherwise it will break DM - DC * encapsulation and turn DM into a maintenance nightmare. * * The following shows a link component relation map. * * DM to DC: * DM includes dc.h * dc_link_exports.c or other dc files implement dc.h * * DC to Link: * dc_link_exports.c or other dc files include link.h * link_factory.c implements link.h * * Link sub-component to Link sub-component: * link_factory.c includes --> link_xxx.h * link_xxx.c implements link_xxx.h
* As you can see if you ever need to add a new dc link function and call it on * DM/dc side, it is very difficult because you will need layers of translation. * The most appropriate approach to implement new requirements on DM/dc side is * to extend or generalize the functionality of existing link function * interfaces so minimal modification is needed outside link component to * achieve your new requirements. This approach reduces or even eliminates the * effort needed outside link component to support a new link feature. This also * reduces code discrepancy among DMs to support the same link feature. If we * test full code path on one version of DM, and there is no feature specific * modification required on other DMs, then we can have higher confidence that * the feature will run on other DMs and produce the same result. The following * are some good examples to start with: * * - detect_link --> to add new link detection or capability retrieval routines * * - validate_mode_timing --> to add new timing validation conditions * * - set_dpms_on/set_dpms_off --> to include new link enablement sequences * * If you must add new link functions, you will need to: * 1. declare the function pointer here under the suitable commented category. * 2. Implement your function in the suitable link_xxx.c file. * 3. Assign the function to link_service in link_factory.c * 4. NEVER include link_xxx.h headers outside link component. * 5. NEVER include link.h on DM side.
*/ #include"core_types.h"
struct link_init_data { conststruct dc *dc; struct dc_context *ctx; /* TODO: remove 'dal' when DC is complete. */
uint32_t connector_index; /* this will be mapped to the HPD pins */
uint32_t link_index; /* this is mapped to DAL display_index
TODO: remove it when DC is complete. */ bool is_dpia_link;
};
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