drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_replay.c

// SPDX-License-Identifier: MIT
/*
 * Copyright 2023 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 "amdgpu_dm_replay.h"
#include "dc_dmub_srv.h"
#include "dc.h"
#include "amdgpu_dm.h"
#include "modules/power/power_helpers.h"
#include "dmub/inc/dmub_cmd.h"
#include "dc/inc/link_service.h"
#include "dm_helpers.h"


/*
 * amdgpu_dm_link_supports_replay() - check if the link supports replay
 * @link: link
 * @aconnector: aconnector
 *
 */
bool amdgpu_dm_link_supports_replay(struct dc_link *link, struct amdgpu_dm_connector *aconnector)
{
	struct dm_connector_state *state = to_dm_connector_state(aconnector->base.state);
	struct dpcd_caps *dpcd_caps = &link->dpcd_caps;
	struct adaptive_sync_caps *as_caps = &link->dpcd_caps.adaptive_sync_caps;

	if (!state->freesync_capable)
		return false;

	if (!aconnector->vsdb_info.replay_mode)
		return false;

	// Check the eDP version
	if (dpcd_caps->edp_rev < EDP_REVISION_13)
		return false;

	if (!dpcd_caps->alpm_caps.bits.AUX_WAKE_ALPM_CAP)
		return false;

	// Check adaptive sync support cap
	if (!as_caps->dp_adap_sync_caps.bits.ADAPTIVE_SYNC_SDP_SUPPORT)
		return false;

	// Sink shall populate line deviation information
	if (dpcd_caps->pr_info.pixel_deviation_per_line == 0 ||
		dpcd_caps->pr_info.max_deviation_line == 0)
		return false;

	return true;
}
EXPORT_IF_KUNIT(amdgpu_dm_link_supports_replay);

/*
 * amdgpu_dm_set_replay_caps() - setup Replay capabilities
 * @link: link
 * @aconnector: aconnector
 *
 */
bool amdgpu_dm_set_replay_caps(struct dc_link *link, struct amdgpu_dm_connector *aconnector)
{
	struct replay_config pr_config = { 0 };
	union replay_debug_flags *debug_flags = NULL;
	struct dc *dc = link->ctx->dc;

	// If Replay is already set to support, return true to skip checks
	if (link->replay_settings.config.replay_supported)
		return true;

	if (!dc_is_embedded_signal(link->connector_signal))
		return false;

	if (link->panel_config.psr.disallow_replay)
		return false;

	if (!amdgpu_dm_link_supports_replay(link, aconnector))
		return false;

	if (!dc->ctx->dmub_srv || !dc->ctx->dmub_srv->dmub ||
		!dc->ctx->dmub_srv->dmub->feature_caps.replay_supported)
		return false;

	/* Mark Replay is supported in link and update related attributes
	 * This flag presents DPCD caps & amd_vsdb caps satisfy replay requirement.
	 */
	pr_config.replay_cap_support = true;

	// Mark Replay is supported in pr_config
	pr_config.replay_supported = true;

	pr_config.replay_enable_option = pr_enable_option_general_ui |
					 pr_enable_option_static_screen	|
					 pr_enable_option_static_screen_coasting;
	pr_config.replay_power_opt_supported = replay_power_opt_smu_opt_static_screen |
					       replay_power_opt_z10_static_screen;
	pr_config.replay_smu_opt_supported = false;
	pr_config.replay_support_fast_resync_in_ultra_sleep_mode =
		aconnector->max_vfreq >= 2 * aconnector->min_vfreq;
	pr_config.force_disable_desync_error_check = false;

	debug_flags = (union replay_debug_flags *)&pr_config.debug_flags;
	debug_flags->u32All = 0;
	debug_flags->bitfields.visual_confirm =	dc->debug.visual_confirm == VISUAL_CONFIRM_REPLAY;
	debug_flags->bitfields.skip_crtc_disabled = dc->debug.replay_skip_crtc_disabled;

	init_replay_config(link, &pr_config);

	return true;
}
EXPORT_IF_KUNIT(amdgpu_dm_set_replay_caps);

/*
 * amdgpu_dm_link_setup_replay() - config replay settings
 * @stream: pointer to dc_stream_state structure
 * @vrr_params: pointer to mod_vrr_params structure containing VRR parameters
 *
 * config replay link settings including coasting vtotal calculations.
 *
 * Return: true if successful, false if any parameter is invalid or replay not supported
 */
bool amdgpu_dm_link_setup_replay(struct dc_stream_state *stream,
		struct mod_vrr_params *vrr_params)
{
	struct dc_link *link;
	unsigned int static_coasting_vtotal;

	if (!stream || !stream->link || !vrr_params)
		return false;

	link = stream->link;
	if (!link->replay_settings.config.replay_supported)
		return false;

	if (link->replay_settings.replay_feature_enabled)
		return true;

	calculate_replay_link_off_frame_count(link, stream->timing.v_total,
			stream->timing.h_total);

	static_coasting_vtotal = mod_freesync_calc_v_total_from_refresh(stream,
			vrr_params->min_refresh_in_uhz);

	set_replay_coasting_vtotal(link, PR_COASTING_TYPE_NOM,
			stream->timing.v_total);
	set_replay_coasting_vtotal(link, PR_COASTING_TYPE_STATIC,
			static_coasting_vtotal);
	return true;
}
EXPORT_IF_KUNIT(amdgpu_dm_link_setup_replay);

/*
 * amdgpu_dm_replay_set_event() - set or clear replay event for a stream
 * @dm: pointer to amdgpu_display_manager
 * @stream: pointer to dc_stream_state
 * @set_event: true to set event, false to clear event
 * @event: replay event type to set or clear
 * @wait_for_disable: whether to wait for replay to be disabled before returning
 *
 * This function sets or clears a specific replay event for the given stream.
 * It temporarily disables idle optimizations during the operation to ensure
 * hardware access is available.
 *
 * Return: true if successful, false if any parameter is invalid or operation fails
 */
bool amdgpu_dm_replay_set_event(struct amdgpu_display_manager *dm,
		struct dc_stream_state *stream,
		bool set_event,
		enum replay_event event,
		bool wait_for_disable)
{
	unsigned int replay_events;

	/* Validate all required parameters */
	if (!stream || !stream->link ||
		!stream->link->replay_settings.replay_feature_enabled)
		return false;

	/* Get current replay events */
	if (!mod_power_get_replay_event(dm->power_module, stream, &replay_events))
		return false;

	/* If all events already in desired state, return true. */
	if ((replay_events & event) == (set_event ? event : 0))
		return true;

	return mod_power_set_replay_event(dm->power_module, stream,
					 set_event, event, wait_for_disable);
}
EXPORT_IF_KUNIT(amdgpu_dm_replay_set_event);