drm/amd/display: Add panel replay enablement option and logic

[Why&How]
1.Add flow to enable and configure panel replay enablement and
configuration
2.Add registry key for enable option
3.Add replay version check to be compatible with freesync replay
4.Add AC/DC switch function to notify ac/dc change.
5.Add flow in set event function to check and decide Replay
enable/disable

Reviewed-by: Robin Chen <[e-mail]>
Signed-off-by: Jack Chang <[e-mail]>
Signed-off-by: Leon Huang <[e-mail]>
Signed-off-by: Ivan Lipski <[e-mail]>
Tested-by: Dan Wheeler <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

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

···
 	unsigned char raw;
 };
 
+union panel_replay_enable_and_configuration_1 {
+	struct {
+		unsigned char PANEL_REPLAY_ENABLE                     :1;
+		unsigned char PANEL_REPLAY_CRC_ENABLE                 :1;
+		unsigned char IRQ_HPD_ASSDP_MISSING                   :1;
+		unsigned char IRQ_HPD_VSCSDP_UNCORRECTABLE_ERROR      :1;
+		unsigned char IRQ_HPD_RFB_ERROR                       :1;
+		unsigned char IRQ_HPD_ACTIVE_FRAME_CRC_ERROR          :1;
+		unsigned char PANEL_REPLAY_SELECTIVE_UPDATE_ENABLE    :1;
+		unsigned char PANEL_REPLAY_EARLY_TRANSPORT_ENABLE     :1;
+	} bits;
+	unsigned char raw;
+};
+
+union panel_replay_enable_and_configuration_2 {
+	struct {
+		unsigned char SINK_REFRESH_RATE_UNLOCK_GRANTED        :1;
+		unsigned char RESERVED                                :1;
+		unsigned char SU_Y_GRANULARITY_EXT_VALUE_ENABLED      :1;
+		unsigned char SU_Y_GRANULARITY_EXT_VALUE              :4;
+		unsigned char SU_REGION_SCAN_LINE_CAPTURE_INDICATION  :1;
+	} bits;
+	unsigned char raw;
+};
+
 union dpcd_alpm_configuration {
 	struct {
 		unsigned char ENABLE                    : 1;

drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c

···
 	/* Set power optimization flag */
 	if (power_opts && link->replay_settings.replay_power_opt_active != *power_opts) {
 		if (replay != NULL && link->replay_settings.replay_feature_enabled &&
-		    replay->funcs->replay_set_power_opt) {
+			replay->funcs->replay_set_power_opt) {
 			replay->funcs->replay_set_power_opt(replay, *power_opts, panel_inst);
 			link->replay_settings.replay_power_opt_active = *power_opts;
 		}
···
 	return true;
 }
 
-bool edp_setup_replay(struct dc_link *link, const struct dc_stream_state *stream)
+static bool edp_setup_panel_replay(struct dc_link *link, const struct dc_stream_state *stream)
+{
+	/* To-do: Setup Replay */
+	struct dc *dc;
+	struct dmub_replay *replay;
+	int i;
+	unsigned int panel_inst;
+	struct replay_context replay_context = { 0 };
+	unsigned int lineTimeInNs = 0;
+
+	union panel_replay_enable_and_configuration_1 pr_config_1 = { 0 };
+	union panel_replay_enable_and_configuration_2 pr_config_2 = { 0 };
+
+	union dpcd_alpm_configuration alpm_config;
+
+	replay_context.controllerId = CONTROLLER_ID_UNDEFINED;
+
+	if (!link)
+		return false;
+
+	//Clear Panel Replay enable & config
+	dm_helpers_dp_write_dpcd(link->ctx, link,
+		DP_PANEL_REPLAY_ENABLE_AND_CONFIGURATION_1,
+		(uint8_t *)&(pr_config_1.raw), sizeof(uint8_t));
+
+	dm_helpers_dp_write_dpcd(link->ctx, link,
+		DP_PANEL_REPLAY_ENABLE_AND_CONFIGURATION_2,
+		(uint8_t *)&(pr_config_2.raw), sizeof(uint8_t));
+
+	if (!(link->replay_settings.config.replay_supported))
+		return false;
+
+	dc = link->ctx->dc;
+
+	//not sure should keep or not
+	replay = dc->res_pool->replay;
+
+	if (!replay)
+		return false;
+
+	if (!dc_get_edp_link_panel_inst(dc, link, &panel_inst))
+		return false;
+
+	replay_context.aux_inst = link->ddc->ddc_pin->hw_info.ddc_channel;
+	replay_context.digbe_inst = link->link_enc->transmitter;
+	replay_context.digfe_inst = link->link_enc->preferred_engine;
+
+	for (i = 0; i < MAX_PIPES; i++) {
+		if (dc->current_state->res_ctx.pipe_ctx[i].stream
+				== stream) {
+			/* dmcu -1 for all controller id values,
+			 * therefore +1 here
+			 */
+			replay_context.controllerId =
+				dc->current_state->res_ctx.pipe_ctx[i].stream_res.tg->inst + 1;
+			break;
+		}
+	}
+
+	lineTimeInNs =
+		((stream->timing.h_total * 1000000) /
+			(stream->timing.pix_clk_100hz / 10)) + 1;
+
+	replay_context.line_time_in_ns = lineTimeInNs;
+
+	link->replay_settings.replay_feature_enabled =
+			replay->funcs->replay_copy_settings(replay, link, &replay_context, panel_inst);
+
+	if (link->replay_settings.replay_feature_enabled) {
+		pr_config_1.bits.PANEL_REPLAY_ENABLE = 1;
+		pr_config_1.bits.PANEL_REPLAY_CRC_ENABLE = 1;
+		pr_config_1.bits.IRQ_HPD_ASSDP_MISSING = 1;
+		pr_config_1.bits.IRQ_HPD_VSCSDP_UNCORRECTABLE_ERROR = 1;
+		pr_config_1.bits.IRQ_HPD_RFB_ERROR = 1;
+		pr_config_1.bits.IRQ_HPD_ACTIVE_FRAME_CRC_ERROR = 1;
+		pr_config_1.bits.PANEL_REPLAY_SELECTIVE_UPDATE_ENABLE = 1;
+		pr_config_1.bits.PANEL_REPLAY_EARLY_TRANSPORT_ENABLE = 1;
+
+		pr_config_2.bits.SINK_REFRESH_RATE_UNLOCK_GRANTED = 0;
+		pr_config_2.bits.SU_Y_GRANULARITY_EXT_VALUE_ENABLED = 0;
+		pr_config_2.bits.SU_REGION_SCAN_LINE_CAPTURE_INDICATION = 0;
+
+		dm_helpers_dp_write_dpcd(link->ctx, link,
+			DP_PANEL_REPLAY_ENABLE_AND_CONFIGURATION_1,
+			(uint8_t *)&(pr_config_1.raw), sizeof(uint8_t));
+
+		dm_helpers_dp_write_dpcd(link->ctx, link,
+			DP_PANEL_REPLAY_ENABLE_AND_CONFIGURATION_2,
+			(uint8_t *)&(pr_config_2.raw), sizeof(uint8_t));
+
+		//ALPM Setup
+		memset(&alpm_config, 0, sizeof(alpm_config));
+		alpm_config.bits.ENABLE = link->replay_settings.config.alpm_mode != DC_ALPM_UNSUPPORTED ? 1 : 0;
+
+		if (link->replay_settings.config.alpm_mode == DC_ALPM_AUXLESS) {
+			alpm_config.bits.ALPM_MODE_SEL = 1;
+			alpm_config.bits.ACDS_PERIOD_DURATION = 1;
+		}
+
+		dm_helpers_dp_write_dpcd(
+			link->ctx,
+			link,
+			DP_RECEIVER_ALPM_CONFIG,
+			&alpm_config.raw,
+			sizeof(alpm_config.raw));
+	}
+
+	return true;
+}
+
+static bool edp_setup_freesync_replay(struct dc_link *link, const struct dc_stream_state *stream)
 {
 	/* To-do: Setup Replay */
 	struct dc *dc;
···
 	link->replay_settings.config.replay_video_conferencing_optimization_enabled = false;
 
 	return true;
+}
+
+bool edp_setup_replay(struct dc_link *link, const struct dc_stream_state *stream)
+{
+	if (!link)
+		return false;
+	if (link->replay_settings.config.replay_version == DC_VESA_PANEL_REPLAY)
+		return edp_setup_panel_replay(link, stream);
+	else if (link->replay_settings.config.replay_version == DC_FREESYNC_REPLAY)
+		return edp_setup_freesync_replay(link, stream);
+	else
+		return false;
 }
 
 /*

drivers/gpu/drm/amd/display/include/dpcd_defs.h

···
 #ifndef DP_SINK_HW_REVISION_START // can remove this once the define gets into linux drm_dp_helper.h
 #define DP_SINK_HW_REVISION_START 0x409
 #endif
+/* Panel Replay*/
+#ifndef DP_PANEL_REPLAY_CAPABILITY_SUPPORT // can remove this once the define gets into linux drm_dp_helper.h
+#define DP_PANEL_REPLAY_CAPABILITY_SUPPORT 0x0b0
+#endif /* DP_PANEL_REPLAY_CAPABILITY_SUPPORT */
+#ifndef DP_PANEL_REPLAY_CAPABILITY // can remove this once the define gets into linux drm_dp_helper.h
+#define DP_PANEL_REPLAY_CAPABILITY 0x0b1
+#endif /* DP_PANEL_REPLAY_CAPABILITY */
+#ifndef DP_PANEL_REPLAY_ENABLE_AND_CONFIGURATION_1  // can remove this once the define gets into linux drm_dp_helper.h
+#define DP_PANEL_REPLAY_ENABLE_AND_CONFIGURATION_1  0x1b0
+#endif /* DP_PANEL_REPLAY_ENABLE_AND_CONFIGURATION_1 */
+#ifndef DP_PANEL_REPLAY_ENABLE // can remove this once the define gets into linux drm_dp_helper.h
+#define DP_PANEL_REPLAY_ENABLE (1 << 0)
+#endif /* DP_PANEL_REPLAY_ENABLE */
+#ifndef DP_PANEL_REPLAY_ENABLE_AND_CONFIGURATION_2 // can remove this once the define gets into linux drm_dp_helper.h
+#define DP_PANEL_REPLAY_ENABLE_AND_CONFIGURATION_2 0x1b1
+#endif /* DP_PANEL_REPLAY_ENABLE_AND_CONFIGURATION_2 */
 
 enum dpcd_revision {
 	DPCD_REV_10 = 0x10,

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

···
 	uint8_t max_link_off_frame_count = 0;
 	uint16_t max_deviation_line = 0,  pixel_deviation_per_line = 0;
 
+	if (!link || link->replay_settings.config.replay_version != DC_FREESYNC_REPLAY)
+		return;
+
 	max_deviation_line = link->dpcd_caps.pr_info.max_deviation_line;
 	pixel_deviation_per_line = link->dpcd_caps.pr_info.pixel_deviation_per_line;