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

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_replay.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_replay.c
Extension
.c
Size
6926 bytes
Lines
211
Domain
Driver Families
Bucket
drivers/gpu
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// 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 "amdgpu_dm_kunit_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;

Annotation

Implementation Notes