drm/amd/display: Add Functions to enable Freesync Panel Replay

Add various functions for replay, such as construct, destroy, enable
get_state, and copy_setting etc. These functions communicate with the
firmware to setup and enable panel 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>

3 files changed, 362 insertions, 1 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/dce/Makefile b/drivers/gpu/drm/amd/display/dc/dce/Makefile
index 01490c9ba958..15b64c26d5a2 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/Makefile
+++ b/drivers/gpu/drm/amd/display/dc/dce/Makefile
@@ -30,7 +30,7 @@ DCE = dce_audio.o dce_stream_encoder.o dce_link_encoder.o dce_hwseq.o \
 dce_mem_input.o dce_clock_source.o dce_scl_filters.o dce_transform.o \
 dce_opp.o dce_dmcu.o dce_abm.o dce_ipp.o dce_aux.o \
 dce_i2c.o dce_i2c_hw.o dce_i2c_sw.o dmub_psr.o dmub_abm.o dmub_abm_lcd.o dce_panel_cntl.o \
-dmub_hw_lock_mgr.o dmub_outbox.o
+dmub_hw_lock_mgr.o dmub_outbox.o dmub_replay.o
 
 AMD_DAL_DCE = $(addprefix $(AMDDALPATH)/dc/dce/,$(DCE))
 
diff --git a/drivers/gpu/drm/amd/display/dc/dce/dmub_replay.c b/drivers/gpu/drm/amd/display/dc/dce/dmub_replay.c
new file mode 100644
index 000000000000..cab7e71fd27f
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/dce/dmub_replay.c
@@ -0,0 +1,303 @@
+/*
+ * 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 "dc.h"
+#include "dc_dmub_srv.h"
+#include "dmub/dmub_srv.h"
+#include "core_types.h"
+#include "dmub_replay.h"
+
+#define DC_TRACE_LEVEL_MESSAGE(...) /* do nothing */
+
+#define MAX_PIPES 6
+
+/**
+ * Get Replay state from firmware.
+ */
+static void dmub_replay_get_state(struct dmub_replay *dmub, enum replay_state *state, uint8_t panel_inst)
+{
+	struct dmub_srv *srv = dmub->ctx->dmub_srv->dmub;
+	/* uint32_t raw_state = 0; */
+	uint32_t retry_count = 0;
+	enum dmub_status status;
+
+	do {
+		// Send gpint command and wait for ack
+		status = dmub_srv_send_gpint_command(srv, DMUB_GPINT__GET_REPLAY_STATE, panel_inst, 30);
+
+		if (status == DMUB_STATUS_OK) {
+			// GPINT was executed, get response
+			dmub_srv_get_gpint_response(srv, (uint32_t *)state);
+		} else
+			// Return invalid state when GPINT times out
+			*state = REPLAY_STATE_INVALID;
+	} while (++retry_count <= 1000 && *state == REPLAY_STATE_INVALID);
+
+	// Assert if max retry hit
+	if (retry_count >= 1000 && *state == REPLAY_STATE_INVALID) {
+		ASSERT(0);
+		/* To-do: Add retry fail log */
+	}
+}
+
+/**
+ * Enable/Disable Replay.
+ */
+static void dmub_replay_enable(struct dmub_replay *dmub, bool enable, bool wait, uint8_t panel_inst)
+{
+	union dmub_rb_cmd cmd;
+	struct dc_context *dc = dmub->ctx;
+	uint32_t retry_count;
+	enum replay_state state = REPLAY_STATE_0;
+
+	memset(&cmd, 0, sizeof(cmd));
+	cmd.replay_enable.header.type = DMUB_CMD__REPLAY;
+	cmd.replay_enable.data.panel_inst = panel_inst;
+
+	cmd.replay_enable.header.sub_type = DMUB_CMD__REPLAY_ENABLE;
+	if (enable)
+		cmd.replay_enable.data.enable = REPLAY_ENABLE;
+	else
+		cmd.replay_enable.data.enable = REPLAY_DISABLE;
+
+	cmd.replay_enable.header.payload_bytes = sizeof(struct dmub_rb_cmd_replay_enable_data);
+
+	dm_execute_dmub_cmd(dc, &cmd, DM_DMUB_WAIT_TYPE_WAIT);
+
+	/* Below loops 1000 x 500us = 500 ms.
+	 *  Exit REPLAY may need to wait 1-2 frames to power up. Timeout after at
+	 *  least a few frames. Should never hit the max retry assert below.
+	 */
+	if (wait) {
+		for (retry_count = 0; retry_count <= 1000; retry_count++) {
+			dmub_replay_get_state(dmub, &state, panel_inst);
+
+			if (enable) {
+				if (state != REPLAY_STATE_0)
+					break;
+			} else {
+				if (state == REPLAY_STATE_0)
+					break;
+			}
+
+			fsleep(500);
+		}
+
+		/* assert if max retry hit */
+		if (retry_count >= 1000)
+			ASSERT(0);
+	}
+
+}
+
+/**
+ * Set REPLAY power optimization flags.
+ */
+static void dmub_replay_set_power_opt(struct dmub_replay *dmub, unsigned int power_opt, uint8_t panel_inst)
+{
+	union dmub_rb_cmd cmd;
+	struct dc_context *dc = dmub->ctx;
+
+	memset(&cmd, 0, sizeof(cmd));
+	cmd.replay_set_power_opt.header.type = DMUB_CMD__REPLAY;
+	cmd.replay_set_power_opt.header.sub_type = DMUB_CMD__SET_REPLAY_POWER_OPT;
+	cmd.replay_set_power_opt.header.payload_bytes = sizeof(struct dmub_cmd_replay_set_power_opt_data);
+	cmd.replay_set_power_opt.replay_set_power_opt_data.power_opt = power_opt;
+	cmd.replay_set_power_opt.replay_set_power_opt_data.panel_inst = panel_inst;
+
+	dm_execute_dmub_cmd(dc, &cmd, DM_DMUB_WAIT_TYPE_WAIT);
+}
+
+/**
+ * Setup Replay by programming phy registers and sending replay hw context values to firmware.
+ */
+static bool dmub_replay_copy_settings(struct dmub_replay *dmub,
+	struct dc_link *link,
+	struct replay_context *replay_context,
+	uint8_t panel_inst)
+{
+	union dmub_rb_cmd cmd;
+	struct dc_context *dc = dmub->ctx;
+	struct dmub_cmd_replay_copy_settings_data *copy_settings_data
+		= &cmd.replay_copy_settings.replay_copy_settings_data;
+	struct pipe_ctx *pipe_ctx = NULL;
+	struct resource_context *res_ctx = &link->ctx->dc->current_state->res_ctx;
+	int i = 0;
+
+	for (i = 0; i < MAX_PIPES; i++) {
+		if (res_ctx &&
+			res_ctx->pipe_ctx[i].stream &&
+			res_ctx->pipe_ctx[i].stream->link &&
+			res_ctx->pipe_ctx[i].stream->link == link &&
+			res_ctx->pipe_ctx[i].stream->link->connector_signal == SIGNAL_TYPE_EDP) {
+			pipe_ctx = &res_ctx->pipe_ctx[i];
+			//TODO: refactor for multi edp support
+			break;
+		}
+	}
+
+	if (!pipe_ctx)
+		return false;
+
+	memset(&cmd, 0, sizeof(cmd));
+	cmd.replay_copy_settings.header.type = DMUB_CMD__REPLAY;
+	cmd.replay_copy_settings.header.sub_type = DMUB_CMD__REPLAY_COPY_SETTINGS;
+	cmd.replay_copy_settings.header.payload_bytes = sizeof(struct dmub_cmd_replay_copy_settings_data);
+
+	// HW insts
+	copy_settings_data->aux_inst				= replay_context->aux_inst;
+	copy_settings_data->digbe_inst				= replay_context->digbe_inst;
+	copy_settings_data->digfe_inst				= replay_context->digfe_inst;
+
+	if (pipe_ctx->plane_res.dpp)
+		copy_settings_data->dpp_inst			= pipe_ctx->plane_res.dpp->inst;
+	else
+		copy_settings_data->dpp_inst			= 0;
+	if (pipe_ctx->stream_res.tg)
+		copy_settings_data->otg_inst			= pipe_ctx->stream_res.tg->inst;
+	else
+		copy_settings_data->otg_inst			= 0;
+
+	copy_settings_data->dpphy_inst				= link->link_enc->transmitter;
+
+	// Misc
+	copy_settings_data->line_time_in_ns			= replay_context->line_time_in_ns;
+	copy_settings_data->panel_inst				= panel_inst;
+	copy_settings_data->debug.u32All			= link->replay_settings.config.debug_flags;
+	copy_settings_data->pixel_deviation_per_line		= link->dpcd_caps.pr_info.pixel_deviation_per_line;
+	copy_settings_data->max_deviation_line			= link->dpcd_caps.pr_info.max_deviation_line;
+	copy_settings_data->smu_optimizations_en		= link->replay_settings.replay_smu_opt_enable;
+	copy_settings_data->replay_timing_sync_supported = link->replay_settings.config.replay_timing_sync_supported;
+
+	copy_settings_data->flags.u32All = 0;
+	copy_settings_data->flags.bitfields.fec_enable_status = (link->fec_state == dc_link_fec_enabled);
+	copy_settings_data->flags.bitfields.dsc_enable_status = (pipe_ctx->stream->timing.flags.DSC == 1);
+	// WA for PSRSU+DSC on specific TCON, if DSC is enabled, force PSRSU as ffu mode(full frame update)
+	if (((link->dpcd_caps.fec_cap.bits.FEC_CAPABLE &&
+		!link->dc->debug.disable_fec) &&
+		(link->dpcd_caps.dsc_caps.dsc_basic_caps.fields.dsc_support.DSC_SUPPORT &&
+		!link->panel_config.dsc.disable_dsc_edp &&
+		link->dc->caps.edp_dsc_support)) &&
+		link->dpcd_caps.sink_dev_id == DP_DEVICE_ID_38EC11 /*&&
+		(!memcmp(link->dpcd_caps.sink_dev_id_str, DP_SINK_DEVICE_STR_ID_1,
+			sizeof(DP_SINK_DEVICE_STR_ID_1)) ||
+		!memcmp(link->dpcd_caps.sink_dev_id_str, DP_SINK_DEVICE_STR_ID_2,
+			sizeof(DP_SINK_DEVICE_STR_ID_2)))*/)
+		copy_settings_data->flags.bitfields.force_wakeup_by_tps3 = 1;
+	else
+		copy_settings_data->flags.bitfields.force_wakeup_by_tps3 = 0;
+
+
+	dm_execute_dmub_cmd(dc, &cmd, DM_DMUB_WAIT_TYPE_WAIT);
+
+	return true;
+}
+
+/**
+ * Set coasting vtotal.
+ */
+static void dmub_replay_set_coasting_vtotal(struct dmub_replay *dmub,
+		uint16_t coasting_vtotal,
+		uint8_t panel_inst)
+{
+	union dmub_rb_cmd cmd;
+	struct dc_context *dc = dmub->ctx;
+
+	memset(&cmd, 0, sizeof(cmd));
+	cmd.replay_set_coasting_vtotal.header.type = DMUB_CMD__REPLAY;
+	cmd.replay_set_coasting_vtotal.header.sub_type = DMUB_CMD__REPLAY_SET_COASTING_VTOTAL;
+	cmd.replay_set_coasting_vtotal.header.payload_bytes = sizeof(struct dmub_cmd_replay_set_coasting_vtotal_data);
+	cmd.replay_set_coasting_vtotal.replay_set_coasting_vtotal_data.coasting_vtotal = coasting_vtotal;
+
+	dm_execute_dmub_cmd(dc, &cmd, DM_DMUB_WAIT_TYPE_WAIT);
+}
+
+/**
+ * Get Replay residency from firmware.
+ */
+static void dmub_replay_residency(struct dmub_replay *dmub, uint8_t panel_inst,
+	uint32_t *residency, const bool is_start, const bool is_alpm)
+{
+	struct dmub_srv *srv = dmub->ctx->dmub_srv->dmub;
+	uint16_t param = (uint16_t)(panel_inst << 8);
+
+	if (is_alpm)
+		param |= REPLAY_RESIDENCY_MODE_ALPM;
+
+	if (is_start)
+		param |= REPLAY_RESIDENCY_ENABLE;
+
+	// Send gpint command and wait for ack
+	dmub_srv_send_gpint_command(srv, DMUB_GPINT__REPLAY_RESIDENCY, param, 30);
+
+	if (!is_start)
+		dmub_srv_get_gpint_response(srv, residency);
+	else
+		*residency = 0;
+}
+
+static const struct dmub_replay_funcs replay_funcs = {
+	.replay_copy_settings		= dmub_replay_copy_settings,
+	.replay_enable			= dmub_replay_enable,
+	.replay_get_state		= dmub_replay_get_state,
+	.replay_set_power_opt		= dmub_replay_set_power_opt,
+	.replay_set_coasting_vtotal	= dmub_replay_set_coasting_vtotal,
+	.replay_residency		= dmub_replay_residency,
+};
+
+/**
+ * Construct Replay object.
+ */
+static void dmub_replay_construct(struct dmub_replay *replay, struct dc_context *ctx)
+{
+	replay->ctx = ctx;
+	replay->funcs = &replay_funcs;
+}
+
+/**
+ * Allocate and initialize Replay object.
+ */
+struct dmub_replay *dmub_replay_create(struct dc_context *ctx)
+{
+	struct dmub_replay *replay = kzalloc(sizeof(struct dmub_replay), GFP_KERNEL);
+
+	if (replay == NULL) {
+		BREAK_TO_DEBUGGER();
+		return NULL;
+	}
+
+	dmub_replay_construct(replay, ctx);
+
+	return replay;
+}
+
+/**
+ * Deallocate Replay object.
+ */
+void dmub_replay_destroy(struct dmub_replay **dmub)
+{
+	kfree(*dmub);
+	*dmub = NULL;
+}
diff --git a/drivers/gpu/drm/amd/display/dc/dce/dmub_replay.h b/drivers/gpu/drm/amd/display/dc/dce/dmub_replay.h
new file mode 100644
index 000000000000..e8385bbf51fc
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/dce/dmub_replay.h
@@ -0,0 +1,58 @@
+/*
+ * 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
+ *
+ */
+
+#ifndef _DMUB_REPLAY_H_
+#define _DMUB_REPLAY_H_
+
+#include "dc_types.h"
+#include "dmub_cmd.h"
+struct dc_link;
+struct dmub_replay_funcs;
+
+struct dmub_replay {
+	struct dc_context *ctx;
+	const struct dmub_replay_funcs *funcs;
+};
+
+struct dmub_replay_funcs {
+	void (*replay_get_state)(struct dmub_replay *dmub, enum replay_state *state,
+		uint8_t panel_inst);
+	void (*replay_enable)(struct dmub_replay *dmub, bool enable, bool wait,
+		uint8_t panel_inst);
+	bool (*replay_copy_settings)(struct dmub_replay *dmub, struct dc_link *link,
+		struct replay_context *replay_context, uint8_t panel_inst);
+	void (*replay_set_power_opt)(struct dmub_replay *dmub, unsigned int power_opt,
+		uint8_t panel_inst);
+	void (*replay_set_coasting_vtotal)(struct dmub_replay *dmub, uint16_t coasting_vtotal,
+		uint8_t panel_inst);
+	void (*replay_residency)(struct dmub_replay *dmub,
+		uint8_t panel_inst, uint32_t *residency, const bool is_start, const bool is_alpm);
+};
+
+struct dmub_replay *dmub_replay_create(struct dc_context *ctx);
+void dmub_replay_destroy(struct dmub_replay **dmub);
+
+
+#endif /* _DMUB_REPLAY_H_ */