drm/amd/display: Enable Panel Replay for static screen use case

[Why]
Enable the Panel Replay if eDP panel and ASIC support.
(prioritize Panel Replay over PSR)

[How]
- Setup the Panel Replay config during the device init
  (prioritize Panel Replay over PSR).
- Separate the Replay init function into two functions
  amdgpu_dm_link_setup_replay() and amdgpu_dm_set_replay_caps()
  to fix the issue in the earlier commit that cause PSR and Replay
  enabled at the same time.

Reviewed-by: Sun peng Li <sunpeng.li@amd.com>
Acked-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Tom Chung <chiahsuan.chung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -67,6 +67,7 @@
 #include "amdgpu_dm_debugfs.h"
 #endif
 #include "amdgpu_dm_psr.h"
+#include "amdgpu_dm_replay.h"
 
 #include "ivsrcid/ivsrcid_vislands30.h"
 
@@ -4394,6 +4395,7 @@ static int amdgpu_dm_initialize_drm_device(struct amdgpu_device *adev)
 	enum dc_connection_type new_connection_type = dc_connection_none;
 	const struct dc_plane_cap *plane;
 	bool psr_feature_enabled = false;
+	bool replay_feature_enabled = false;
 	int max_overlay = dm->dc->caps.max_slave_planes;
 
 	dm->display_indexes_num = dm->dc->caps.max_streams;
@@ -4505,6 +4507,23 @@ static int amdgpu_dm_initialize_drm_device(struct amdgpu_device *adev)
 		}
 	}
 
+	/* Determine whether to enable Replay support by default. */
+	if (!(amdgpu_dc_debug_mask & DC_DISABLE_REPLAY)) {
+		switch (amdgpu_ip_version(adev, DCE_HWIP, 0)) {
+		case IP_VERSION(3, 1, 4):
+		case IP_VERSION(3, 1, 5):
+		case IP_VERSION(3, 1, 6):
+		case IP_VERSION(3, 2, 0):
+		case IP_VERSION(3, 2, 1):
+		case IP_VERSION(3, 5, 0):
+			replay_feature_enabled = true;
+			break;
+		default:
+			replay_feature_enabled = amdgpu_dc_feature_mask & DC_REPLAY_MASK;
+			break;
+		}
+	}
+
 	/* loops over all connectors on the board */
 	for (i = 0; i < link_cnt; i++) {
 		struct dc_link *link = NULL;
@@ -4573,6 +4592,11 @@ static int amdgpu_dm_initialize_drm_device(struct amdgpu_device *adev)
 				amdgpu_dm_update_connector_after_detect(aconnector);
 				setup_backlight_device(dm, aconnector);
 
+				/* Disable PSR if Replay can be enabled */
+				if (replay_feature_enabled)
+					if (amdgpu_dm_set_replay_caps(link, aconnector))
+						psr_feature_enabled = false;
+
 				if (psr_feature_enabled)
 					amdgpu_dm_set_psr_caps(link);
 
@@ -8522,10 +8546,17 @@ static void amdgpu_dm_commit_planes(struct drm_atomic_state *state,
 			dm_update_pflip_irq_state(drm_to_adev(dev),
 						  acrtc_attach);
 
-		if ((acrtc_state->update_type > UPDATE_TYPE_FAST) &&
-				acrtc_state->stream->link->psr_settings.psr_version != DC_PSR_VERSION_UNSUPPORTED &&
-				!acrtc_state->stream->link->psr_settings.psr_feature_enabled)
-			amdgpu_dm_link_setup_psr(acrtc_state->stream);
+		if (acrtc_state->update_type > UPDATE_TYPE_FAST) {
+			if (acrtc_state->stream->link->replay_settings.config.replay_supported &&
+					!acrtc_state->stream->link->replay_settings.replay_feature_enabled) {
+				struct amdgpu_dm_connector *aconn =
+					(struct amdgpu_dm_connector *)acrtc_state->stream->dm_stream_context;
+				amdgpu_dm_link_setup_replay(acrtc_state->stream->link, aconn);
+			} else if (acrtc_state->stream->link->psr_settings.psr_version != DC_PSR_VERSION_UNSUPPORTED &&
+					!acrtc_state->stream->link->psr_settings.psr_feature_enabled) {
+				amdgpu_dm_link_setup_psr(acrtc_state->stream);
+			}
+		}
 
 		/* Decrement skip count when PSR is enabled and we're doing fast updates. */
 		if (acrtc_state->update_type == UPDATE_TYPE_FAST &&
@@ -8814,11 +8845,12 @@ static void amdgpu_dm_commit_streams(struct drm_atomic_state *state,
 		}
 	} /* for_each_crtc_in_state() */
 
-	/* if there mode set or reset, disable eDP PSR */
+	/* if there mode set or reset, disable eDP PSR, Replay */
 	if (mode_set_reset_required) {
 		if (dm->vblank_control_workqueue)
 			flush_workqueue(dm->vblank_control_workqueue);
 
+		amdgpu_dm_replay_disable_all(dm);
 		amdgpu_dm_psr_disable_all(dm);
 	}
 

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

@@ -29,6 +29,7 @@
 #include "dc.h"
 #include "amdgpu.h"
 #include "amdgpu_dm_psr.h"
+#include "amdgpu_dm_replay.h"
 #include "amdgpu_dm_crtc.h"
 #include "amdgpu_dm_plane.h"
 #include "amdgpu_dm_trace.h"
@@ -95,6 +96,48 @@ bool amdgpu_dm_crtc_vrr_active(struct dm_crtc_state *dm_state)
 	       dm_state->freesync_config.state == VRR_STATE_ACTIVE_FIXED;
 }
 
+/**
+ * The DRM vblank counter enable/disable action is used as the trigger to enable
+ * or disable various panel self-refresh features:
+ *
+ * Panel Replay and PSR SU
+ * - Enable when:
+ *      - vblank counter is disabled
+ *      - entry is allowed: usermode demonstrates an adequate number of fast
+ *        commits)
+ *     - CRC capture window isn't active
+ * - Keep enabled even when vblank counter gets enabled
+ *
+ * PSR1
+ * - Enable condition same as above
+ * - Disable when vblank counter is enabled
+ */
+static void amdgpu_dm_crtc_set_panel_sr_feature(
+	struct vblank_control_work *vblank_work,
+	bool vblank_enabled, bool allow_sr_entry)
+{
+	struct dc_link *link = vblank_work->stream->link;
+	bool is_sr_active = (link->replay_settings.replay_allow_active ||
+				 link->psr_settings.psr_allow_active);
+	bool is_crc_window_active = false;
+
+#ifdef CONFIG_DRM_AMD_SECURE_DISPLAY
+	is_crc_window_active =
+		amdgpu_dm_crc_window_is_activated(&vblank_work->acrtc->base);
+#endif
+
+	if (link->replay_settings.replay_feature_enabled &&
+		allow_sr_entry && !is_sr_active && !is_crc_window_active) {
+		amdgpu_dm_replay_enable(vblank_work->stream, true);
+	} else if (vblank_enabled) {
+		if (link->psr_settings.psr_version < DC_PSR_VERSION_SU_1 && is_sr_active)
+			amdgpu_dm_psr_disable(vblank_work->stream);
+	} else if (link->psr_settings.psr_feature_enabled &&
+		allow_sr_entry && !is_sr_active && !is_crc_window_active) {
+		amdgpu_dm_psr_enable(vblank_work->stream);
+	}
+}
+
 static void amdgpu_dm_crtc_vblank_control_worker(struct work_struct *work)
 {
 	struct vblank_control_work *vblank_work =
@@ -123,18 +166,10 @@ static void amdgpu_dm_crtc_vblank_control_worker(struct work_struct *work)
 	 * fill_dc_dirty_rects().
 	 */
 	if (vblank_work->stream && vblank_work->stream->link) {
-		if (vblank_work->enable) {
-			if (vblank_work->stream->link->psr_settings.psr_version < DC_PSR_VERSION_SU_1 &&
-			    vblank_work->stream->link->psr_settings.psr_allow_active)
-				amdgpu_dm_psr_disable(vblank_work->stream);
-		} else if (vblank_work->stream->link->psr_settings.psr_feature_enabled &&
-			   !vblank_work->stream->link->psr_settings.psr_allow_active &&
-#ifdef CONFIG_DRM_AMD_SECURE_DISPLAY
-			   !amdgpu_dm_crc_window_is_activated(&vblank_work->acrtc->base) &&
-#endif
-			   vblank_work->acrtc->dm_irq_params.allow_psr_entry) {
-			amdgpu_dm_psr_enable(vblank_work->stream);
-		}
+		amdgpu_dm_crtc_set_panel_sr_feature(
+			vblank_work, vblank_work->enable,
+			vblank_work->acrtc->dm_irq_params.allow_psr_entry ||
+			vblank_work->stream->link->replay_settings.replay_feature_enabled);
 	}
 
 	mutex_unlock(&dm->dc_lock);

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

@@ -60,21 +60,26 @@ static bool link_supports_replay(struct dc_link *link, struct amdgpu_dm_connecto
 	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;
 }
 
 /*
- * amdgpu_dm_setup_replay() - setup replay configuration
+ * amdgpu_dm_set_replay_caps() - setup Replay capabilities
  * @link: link
  * @aconnector: aconnector
  *
  */
-bool amdgpu_dm_setup_replay(struct dc_link *link, struct amdgpu_dm_connector *aconnector)
+bool amdgpu_dm_set_replay_caps(struct dc_link *link, struct amdgpu_dm_connector *aconnector)
 {
-	struct replay_config pr_config;
+	struct replay_config pr_config = { 0 };
 	union replay_debug_flags *debug_flags = NULL;
 
-	// For eDP, if Replay is supported, return true to skip checks
+	// If Replay is already set to support, return true to skip checks
 	if (link->replay_settings.config.replay_supported)
 		return true;
 
@@ -87,27 +92,50 @@ bool amdgpu_dm_setup_replay(struct dc_link *link, struct amdgpu_dm_connector *ac
 	if (!link_supports_replay(link, aconnector))
 		return false;
 
-	// Mark Replay is supported in link and update related attributes
+	// Mark Replay is supported in pr_config
 	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;
-
-	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;
 
-	link->replay_settings.replay_feature_enabled = true;
-
 	init_replay_config(link, &pr_config);
 
 	return true;
 }
 
+/*
+ * amdgpu_dm_link_setup_replay() - configure replay link
+ * @link: link
+ * @aconnector: aconnector
+ *
+ */
+bool amdgpu_dm_link_setup_replay(struct dc_link *link, struct amdgpu_dm_connector *aconnector)
+{
+	struct replay_config *pr_config;
+
+	if (link == NULL || aconnector == NULL)
+		return false;
+
+	pr_config = &link->replay_settings.config;
+
+	if (!pr_config->replay_supported)
+		return false;
+
+	pr_config->replay_power_opt_supported = 0x11;
+	pr_config->replay_smu_opt_supported = false;
+	pr_config->replay_enable_option |= pr_enable_option_static_screen;
+	pr_config->replay_support_fast_resync_in_ultra_sleep_mode = aconnector->max_vfreq >= 2 * aconnector->min_vfreq;
+	pr_config->replay_timing_sync_supported = false;
+
+	if (!pr_config->replay_timing_sync_supported)
+		pr_config->replay_enable_option &= ~pr_enable_option_general_ui;
+
+	link->replay_settings.replay_feature_enabled = true;
+
+	return true;
+}
 
 /*
  * amdgpu_dm_replay_enable() - enable replay f/w
@@ -117,51 +145,23 @@ bool amdgpu_dm_setup_replay(struct dc_link *link, struct amdgpu_dm_connector *ac
  */
 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 */
+	if (link) {
+		link->dc->link_srv->edp_setup_replay(link, stream);
+		link->dc->link_srv->edp_set_coasting_vtotal(link, stream->timing.v_total);
+		DRM_DEBUG_DRIVER("Enabling replay...\n");
+		link->dc->link_srv->edp_set_replay_allow_active(link, &replay_active, wait, false, NULL);
+		return true;
 	}
 
-	return true;
+	return false;
 }
 
 /*
@@ -172,12 +172,31 @@ bool amdgpu_dm_replay_enable(struct dc_stream_state *stream, bool wait)
  */
 bool amdgpu_dm_replay_disable(struct dc_stream_state *stream)
 {
+	bool replay_active = false;
+	struct dc_link *link = NULL;
 
-	if (stream->link) {
+	if (stream == NULL)
+		return false;
+
+	link = stream->link;
+
+	if (link) {
 		DRM_DEBUG_DRIVER("Disabling replay...\n");
-		stream->link->dc->link_srv->edp_set_replay_allow_active(stream->link, NULL, false, false, NULL);
+		link->dc->link_srv->edp_set_replay_allow_active(stream->link, &replay_active, true, false, NULL);
 		return true;
 	}
 
 	return false;
 }
+
+/*
+ * amdgpu_dm_replay_disable_all() - disable replay f/w
+ * if replay is enabled on any stream
+ *
+ * Return: true if success
+ */
+bool amdgpu_dm_replay_disable_all(struct amdgpu_display_manager *dm)
+{
+	DRM_DEBUG_DRIVER("Disabling replay if replay is enabled on any stream\n");
+	return dc_set_replay_allow_active(dm->dc, false);
+}

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

@@ -40,7 +40,9 @@ enum replay_enable_option {
 
 
 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_set_replay_caps(struct dc_link *link, struct amdgpu_dm_connector *aconnector);
+bool amdgpu_dm_link_setup_replay(struct dc_link *link, struct amdgpu_dm_connector *aconnector);
 bool amdgpu_dm_replay_disable(struct dc_stream_state *stream);
+bool amdgpu_dm_replay_disable_all(struct amdgpu_display_manager *dm);
 
 #endif /* AMDGPU_DM_AMDGPU_DM_REPLAY_H_ */

drivers/gpu/drm/amd/include/amd_shared.h

@@ -244,6 +244,7 @@ enum DC_FEATURE_MASK {
 	DC_DISABLE_LTTPR_DP2_0 = (1 << 6), //0x40, disabled by default
 	DC_PSR_ALLOW_SMU_OPT = (1 << 7), //0x80, disabled by default
 	DC_PSR_ALLOW_MULTI_DISP_OPT = (1 << 8), //0x100, disabled by default
+	DC_REPLAY_MASK = (1 << 9), //0x200, disabled by default for dcn < 3.1.4
 };
 
 enum DC_DEBUG_MASK {