1/*
  2 * Copyright 2023 Advanced Micro Devices, Inc.
  3 *
  4 * Permission is hereby granted, free of charge, to any person obtaining a
  5 * copy of this software and associated documentation files (the "Software"),
  6 * to deal in the Software without restriction, including without limitation
  7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  8 * and/or sell copies of the Software, and to permit persons to whom the
  9 * Software is furnished to do so, subject to the following conditions:
 10 *
 11 * The above copyright notice and this permission notice shall be included in
 12 * all copies or substantial portions of the Software.
 13 *
 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 20 * OTHER DEALINGS IN THE SOFTWARE.
 21 *
 22 * Authors: AMD
 23 *
 24 */
 25
 26#include "amdgpu_dm_replay.h"
 27#include "dc.h"
 28#include "dm_helpers.h"
 29#include "amdgpu_dm.h"
 30#include "modules/power/power_helpers.h"
 31#include "dmub/inc/dmub_cmd.h"
 32#include "dc/inc/link.h"
 33
 34/*
 35 * link_supports_replay() - check if the link supports replay
 36 * @link: link
 37 * @aconnector: aconnector
 38 *
 39 */
 40static bool link_supports_replay(struct dc_link *link, struct amdgpu_dm_connector *aconnector)
 41{
 42	struct dm_connector_state *state = to_dm_connector_state(aconnector->base.state);
 43	struct dpcd_caps *dpcd_caps = &link->dpcd_caps;
 44	struct adaptive_sync_caps *as_caps = &link->dpcd_caps.adaptive_sync_caps;
 45
 46	if (!state->freesync_capable)
 47		return false;
 48
 49	if (!aconnector->vsdb_info.replay_mode)
 50		return false;
 51
 52	// Check the eDP version
 53	if (dpcd_caps->edp_rev < EDP_REVISION_13)
 54		return false;
 55
 56	if (!dpcd_caps->alpm_caps.bits.AUX_WAKE_ALPM_CAP)
 57		return false;
 58
 59	// Check adaptive sync support cap
 60	if (!as_caps->dp_adap_sync_caps.bits.ADAPTIVE_SYNC_SDP_SUPPORT)
 61		return false;
 62
 63	return true;
 64}
 65
 66/*
 67 * amdgpu_dm_setup_replay() - setup replay configuration
 68 * @link: link
 69 * @aconnector: aconnector
 70 *
 71 */
 72bool amdgpu_dm_setup_replay(struct dc_link *link, struct amdgpu_dm_connector *aconnector)
 73{
 74	struct replay_config pr_config;
 75	union replay_debug_flags *debug_flags = NULL;
 76
 77	// For eDP, if Replay is supported, return true to skip checks
 78	if (link->replay_settings.config.replay_supported)
 79		return true;
 80
 81	if (!dc_is_embedded_signal(link->connector_signal))
 82		return false;
 83
 84	if (link->panel_config.psr.disallow_replay)
 85		return false;
 86
 87	if (!link_supports_replay(link, aconnector))
 88		return false;
 89
 90	// Mark Replay is supported in link and update related attributes
 91	pr_config.replay_supported = true;
 92	pr_config.replay_power_opt_supported = 0;
 93	pr_config.replay_enable_option |= pr_enable_option_static_screen;
 94	pr_config.replay_timing_sync_supported = aconnector->max_vfreq >= 2 * aconnector->min_vfreq;
 95
 96	if (!pr_config.replay_timing_sync_supported)
 97		pr_config.replay_enable_option &= ~pr_enable_option_general_ui;
 98
 99	debug_flags = (union replay_debug_flags *)&pr_config.debug_flags;
100	debug_flags->u32All = 0;
101	debug_flags->bitfields.visual_confirm =
102		link->ctx->dc->debug.visual_confirm == VISUAL_CONFIRM_REPLAY;
103
104	link->replay_settings.replay_feature_enabled = true;
105
106	init_replay_config(link, &pr_config);
107
108	return true;
109}
110
111
112/*
113 * amdgpu_dm_replay_enable() - enable replay f/w
114 * @stream: stream state
115 *
116 * Return: true if success
117 */
118bool amdgpu_dm_replay_enable(struct dc_stream_state *stream, bool wait)
119{
120	uint64_t state;
121	unsigned int retry_count;
122	bool replay_active = true;
123	const unsigned int max_retry = 1000;
124	bool force_static = true;
125	struct dc_link *link = NULL;
126
127
128	if (stream == NULL)
129		return false;
130
131	link = stream->link;
132
133	if (link == NULL)
134		return false;
135
136	link->dc->link_srv->edp_setup_replay(link, stream);
137
138	link->dc->link_srv->edp_set_replay_allow_active(link, NULL, false, false, NULL);
139
140	link->dc->link_srv->edp_set_replay_allow_active(link, &replay_active, false, true, NULL);
141
142	if (wait == true) {
143
144		for (retry_count = 0; retry_count <= max_retry; retry_count++) {
145			dc_link_get_replay_state(link, &state);
146			if (replay_active) {
147				if (state != REPLAY_STATE_0 &&
148					(!force_static || state == REPLAY_STATE_3))
149					break;
150			} else {
151				if (state == REPLAY_STATE_0)
152					break;
153			}
154			udelay(500);
155		}
156
157		/* assert if max retry hit */
158		if (retry_count >= max_retry)
159			ASSERT(0);
160	} else {
161		/* To-do: Add trace log */
162	}
163
164	return true;
165}
166
167/*
168 * amdgpu_dm_replay_disable() - disable replay f/w
169 * @stream:  stream state
170 *
171 * Return: true if success
172 */
173bool amdgpu_dm_replay_disable(struct dc_stream_state *stream)
174{
175
176	if (stream->link) {
177		DRM_DEBUG_DRIVER("Disabling replay...\n");
178		stream->link->dc->link_srv->edp_set_replay_allow_active(stream->link, NULL, false, false, NULL);
179		return true;
180	}
181
182	return false;
183}