drm/amd/display: Add Freesync Panel DM code

We need certain conditions for replay to be enabled, so create an
interface in DM to enable/disable replay.

Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/amdgpu_dm/Makefile

@@ -38,7 +38,7 @@ AMDGPUDM += dc_fpu.o
 endif
 
 ifneq ($(CONFIG_DRM_AMD_DC),)
-AMDGPUDM += amdgpu_dm_services.o amdgpu_dm_helpers.o amdgpu_dm_pp_smu.o amdgpu_dm_psr.o
+AMDGPUDM += amdgpu_dm_services.o amdgpu_dm_helpers.o amdgpu_dm_pp_smu.o amdgpu_dm_psr.o amdgpu_dm_replay.o
 endif
 
 AMDGPUDM += amdgpu_dm_hdcp.o

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

@@ -0,0 +1,176 @@
+/*
+ * 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.h"
+#include "dm_helpers.h"
+#include "amdgpu_dm.h"
+#include "modules/power/power_helpers.h"
+#include "dmub/inc/dmub_cmd.h"
+#include "dc/inc/link.h"
+
+/*
+ * link_supports_replay() - check if the link supports replay
+ * @link: link
+ * @aconnector: aconnector
+ *
+ */
+static bool 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;
+
+	// 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;
+
+	return true;
+}
+
+/*
+ * amdgpu_dm_setup_replay() - setup replay configuration
+ * @link: link
+ * @aconnector: aconnector
+ *
+ */
+bool amdgpu_dm_setup_replay(struct dc_link *link, struct amdgpu_dm_connector *aconnector)
+{
+	struct replay_config pr_config;
+	union replay_debug_flags *debug_flags = NULL;
+
+	if (!dc_is_embedded_signal(link->connector_signal))
+		return false;
+
+	if (link->panel_config.psr.disallow_replay)
+		return false;
+
+	if (!link_supports_replay(link, aconnector))
+		return false;
+
+	// Mark Replay is supported in link and update related attributes
+	pr_config.replay_supported = true;
+	pr_config.replay_power_opt_supported = 0;
+	pr_config.replay_enable_option |= pr_enable_option_static_screen;
+	pr_config.replay_timing_sync_supported = aconnector->max_vfreq >= 2 * aconnector->min_vfreq ? true : false;
+
+	if (!pr_config.replay_timing_sync_supported)
+		pr_config.replay_enable_option &= ~pr_enable_option_general_ui;
+
+	debug_flags = (union replay_debug_flags *)&pr_config.debug_flags;
+	debug_flags->u32All = 0;
+	debug_flags->bitfields.visual_confirm =
+		link->ctx->dc->debug.visual_confirm == VISUAL_CONFIRM_REPLAY ? true : false;
+
+	link->replay_settings.replay_feature_enabled = true;
+
+	init_replay_config(link, &pr_config);
+
+	return true;
+}
+
+
+/*
+ * amdgpu_dm_replay_enable() - enable replay f/w
+ * @stream: stream state
+ *
+ * Return: true if success
+ */
+bool amdgpu_dm_replay_enable(struct dc_stream_state *stream, bool wait)
+{
+	uint64_t state;
+	unsigned int retry_count;
+	bool replay_active = true;
+	const unsigned int max_retry = 1000;
+	bool force_static = true;
+	struct dc_link *link = NULL;
+
+
+	if (stream == NULL)
+		return false;
+
+	link = stream->link;
+
+	if (link == NULL)
+		return false;
+
+	link->dc->link_srv->edp_setup_replay(link, stream);
+
+	link->dc->link_srv->edp_set_replay_allow_active(link, NULL, false, false, NULL);
+
+	link->dc->link_srv->edp_set_replay_allow_active(link, &replay_active, false, true, NULL);
+
+	if (wait == true) {
+
+		for (retry_count = 0; retry_count <= max_retry; retry_count++) {
+			dc_link_get_replay_state(link, &state);
+			if (replay_active) {
+				if (state != REPLAY_STATE_0 &&
+					(!force_static || state == REPLAY_STATE_3))
+					break;
+			} else {
+				if (state == REPLAY_STATE_0)
+					break;
+			}
+			udelay(500);
+		}
+
+		/* assert if max retry hit */
+		if (retry_count >= max_retry)
+			ASSERT(0);
+	} else {
+		/* To-do: Add trace log */
+	}
+
+	return true;
+}
+
+/*
+ * amdgpu_dm_replay_disable() - disable replay f/w
+ * @stream:  stream state
+ *
+ * Return: true if success
+ */
+bool amdgpu_dm_replay_disable(struct dc_stream_state *stream)
+{
+
+	if (stream->link) {
+		DRM_DEBUG_DRIVER("Disabling replay...\n");
+		stream->link->dc->link_srv->edp_set_replay_allow_active(stream->link, NULL, false, false, NULL);
+		return true;
+	}
+
+	return false;
+}

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

@@ -0,0 +1,46 @@
+/*
+ * 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
+ *
+ */
+
+#ifndef AMDGPU_DM_AMDGPU_DM_REPLAY_H_
+#define AMDGPU_DM_AMDGPU_DM_REPLAY_H_
+
+#include "amdgpu.h"
+
+enum replay_enable_option {
+	pr_enable_option_static_screen = 0x1,
+	pr_enable_option_mpo_video = 0x2,
+	pr_enable_option_full_screen_video = 0x4,
+	pr_enable_option_general_ui = 0x8,
+	pr_enable_option_static_screen_coasting = 0x10000,
+	pr_enable_option_mpo_video_coasting = 0x20000,
+	pr_enable_option_full_screen_video_coasting = 0x40000,
+};
+
+
+bool amdgpu_dm_replay_enable(struct dc_stream_state *stream, bool enable);
+bool amdgpu_dm_setup_replay(struct dc_link *link, struct amdgpu_dm_connector *aconnector);
+bool amdgpu_dm_replay_disable(struct dc_stream_state *stream);
+
+#endif /* AMDGPU_DM_AMDGPU_DM_REPLAY_H_ */

drivers/gpu/drm/amd/display/dc/core/dc_link_exports.c

@@ -467,6 +467,11 @@ bool dc_link_setup_psr(struct dc_link *link,
 	return link->dc->link_srv->edp_setup_psr(link, stream, psr_config, psr_context);
 }
 
+bool dc_link_get_replay_state(const struct dc_link *link, uint64_t *state)
+{
+	return link->dc->link_srv->edp_get_replay_state(link, state);
+}
+
 bool dc_link_wait_for_t12(struct dc_link *link)
 {
 	return link->dc->link_srv->edp_wait_for_t12(link);

drivers/gpu/drm/amd/display/dc/dc.h

@@ -2011,6 +2011,8 @@ bool dc_link_setup_psr(struct dc_link *dc_link,
 		const struct dc_stream_state *stream, struct psr_config *psr_config,
 		struct psr_context *psr_context);
 
+bool dc_link_get_replay_state(const struct dc_link *dc_link, uint64_t *state);
+
 /* On eDP links this function call will stall until T12 has elapsed.
  * If the panel is not in power off state, this function will return
  * immediately.

drivers/gpu/drm/amd/display/modules/power/power_helpers.c

@@ -926,6 +926,11 @@ void mod_power_calc_psr_configs(struct psr_config *psr_config,
 		!link->dpcd_caps.psr_info.psr_dpcd_caps.bits.LINK_TRAINING_ON_EXIT_NOT_REQUIRED;
 }
 
+void init_replay_config(struct dc_link *link, struct replay_config *pr_config)
+{
+	link->replay_settings.config = *pr_config;
+}
+
 bool mod_power_only_edp(const struct dc_state *context, const struct dc_stream_state *stream)
 {
 	return context && context->stream_count == 1 && dc_is_embedded_signal(stream->signal);

drivers/gpu/drm/amd/display/modules/power/power_helpers.h

@@ -53,6 +53,8 @@ bool dmub_init_abm_config(struct resource_pool *res_pool,
 		struct dmcu_iram_parameters params,
 		unsigned int inst);
 
+void init_replay_config(struct dc_link *link, struct replay_config *pr_config);
+
 bool is_psr_su_specific_panel(struct dc_link *link);
 void mod_power_calc_psr_configs(struct psr_config *psr_config,
 		struct dc_link *link,