// SPDX-License-Identifier: MIT
//
// Copyright 2024 Advanced Micro Devices, Inc.

#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

#define GPINT_RETRY_NUM 20

static const uint8_t DP_SINK_DEVICE_STR_ID_1[] = {7, 1, 8, 7, 3};
static const uint8_t DP_SINK_DEVICE_STR_ID_2[] = {7, 1, 8, 7, 5};

/*
 * Get Replay state from firmware.
 */
static void dmub_replay_get_state(struct dmub_replay *dmub, enum replay_state *state, uint8_t panel_inst)
{
	uint32_t retry_count = 0;

	do {
		// Send gpint command and wait for ack
		if (!dc_wake_and_execute_gpint(dmub->ctx, DMUB_GPINT__GET_REPLAY_STATE, panel_inst,
					       (uint32_t *)state, DM_DMUB_WAIT_TYPE_WAIT_WITH_REPLY)) {
			// 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);

	dc_wake_and_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;
			}

			/* must *not* be fsleep - this can be called from high irq levels */
			udelay(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;

	dc_wake_and_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->debug.bitfields.enable_ips_visual_confirm = dc->dc->debug.enable_ips_visual_confirm;

	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;

	dc_wake_and_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,
		uint32_t coasting_vtotal,
		uint8_t panel_inst)
{
	union dmub_rb_cmd cmd;
	struct dc_context *dc = dmub->ctx;
	struct dmub_rb_cmd_replay_set_coasting_vtotal *pCmd = NULL;

	pCmd = &(cmd.replay_set_coasting_vtotal);

	memset(&cmd, 0, sizeof(cmd));
	pCmd->header.type = DMUB_CMD__REPLAY;
	pCmd->header.sub_type = DMUB_CMD__REPLAY_SET_COASTING_VTOTAL;
	pCmd->header.payload_bytes = sizeof(struct dmub_cmd_replay_set_coasting_vtotal_data);
	pCmd->replay_set_coasting_vtotal_data.coasting_vtotal = (coasting_vtotal & 0xFFFF);
	pCmd->replay_set_coasting_vtotal_data.coasting_vtotal_high = (coasting_vtotal & 0xFFFF0000) >> 16;

	dc_wake_and_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, enum pr_residency_mode mode)
{
	uint16_t param = (uint16_t)(panel_inst << 8);
	uint32_t i = 0;

	switch (mode) {
	case PR_RESIDENCY_MODE_PHY:
		param |= REPLAY_RESIDENCY_FIELD_MODE_PHY;
		break;
	case PR_RESIDENCY_MODE_ALPM:
		param |= REPLAY_RESIDENCY_FIELD_MODE_ALPM;
		break;
	case PR_RESIDENCY_MODE_IPS2:
		param |= REPLAY_RESIDENCY_REVISION_1;
		param |= REPLAY_RESIDENCY_FIELD_MODE2_IPS;
		break;
	case PR_RESIDENCY_MODE_FRAME_CNT:
		param |= REPLAY_RESIDENCY_REVISION_1;
		param |= REPLAY_RESIDENCY_FIELD_MODE2_FRAME_CNT;
		break;
	case PR_RESIDENCY_MODE_ENABLEMENT_PERIOD:
		param |= REPLAY_RESIDENCY_REVISION_1;
		param |= REPLAY_RESIDENCY_FIELD_MODE2_EN_PERIOD;
		break;
	default:
		break;
	}

	if (is_start)
		param |= REPLAY_RESIDENCY_ENABLE;

	for (i = 0; i < GPINT_RETRY_NUM; i++) {
		// Send gpint command and wait for ack
		if (dc_wake_and_execute_gpint(dmub->ctx, DMUB_GPINT__REPLAY_RESIDENCY, param,
			residency, DM_DMUB_WAIT_TYPE_WAIT_WITH_REPLY))
			return;

		udelay(100);
	}

	// it means gpint retry many times
	*residency = 0;
}

/*
 * Set REPLAY power optimization flags and coasting vtotal.
 */
static void dmub_replay_set_power_opt_and_coasting_vtotal(struct dmub_replay *dmub,
		unsigned int power_opt, uint8_t panel_inst, uint32_t coasting_vtotal)
{
	union dmub_rb_cmd cmd;
	struct dc_context *dc = dmub->ctx;
	struct dmub_rb_cmd_replay_set_power_opt_and_coasting_vtotal *pCmd = NULL;

	pCmd = &(cmd.replay_set_power_opt_and_coasting_vtotal);

	memset(&cmd, 0, sizeof(cmd));
	pCmd->header.type = DMUB_CMD__REPLAY;
	pCmd->header.sub_type = DMUB_CMD__REPLAY_SET_POWER_OPT_AND_COASTING_VTOTAL;
	pCmd->header.payload_bytes =
			sizeof(struct dmub_rb_cmd_replay_set_power_opt_and_coasting_vtotal) -
			sizeof(struct dmub_cmd_header);
	pCmd->replay_set_power_opt_data.power_opt = power_opt;
	pCmd->replay_set_power_opt_data.panel_inst = panel_inst;
	pCmd->replay_set_coasting_vtotal_data.coasting_vtotal = (coasting_vtotal & 0xFFFF);
	pCmd->replay_set_coasting_vtotal_data.coasting_vtotal_high = (coasting_vtotal & 0xFFFF0000) >> 16;

	dc_wake_and_execute_dmub_cmd(dc, &cmd, DM_DMUB_WAIT_TYPE_WAIT);
}

/*
 * send Replay general cmd to DMUB.
 */
static void dmub_replay_send_cmd(struct dmub_replay *dmub,
		enum replay_FW_Message_type msg, union dmub_replay_cmd_set *cmd_element)
{
	union dmub_rb_cmd cmd;
	struct dc_context *ctx = NULL;

	if (dmub == NULL || cmd_element == NULL)
		return;

	ctx = dmub->ctx;
	if (ctx != NULL) {

		if (msg != Replay_Msg_Not_Support) {
			memset(&cmd, 0, sizeof(cmd));
			//Header
			cmd.replay_set_timing_sync.header.type = DMUB_CMD__REPLAY;
		} else
			return;
	} else
		return;

	switch (msg) {
	case Replay_Set_Timing_Sync_Supported:
		//Header
		cmd.replay_set_timing_sync.header.sub_type =
			DMUB_CMD__REPLAY_SET_TIMING_SYNC_SUPPORTED;
		cmd.replay_set_timing_sync.header.payload_bytes =
			sizeof(struct dmub_rb_cmd_replay_set_timing_sync) -
			sizeof(struct dmub_cmd_header);
		//Cmd Body
		cmd.replay_set_timing_sync.replay_set_timing_sync_data.panel_inst =
						cmd_element->sync_data.panel_inst;
		cmd.replay_set_timing_sync.replay_set_timing_sync_data.timing_sync_supported =
						cmd_element->sync_data.timing_sync_supported;
		break;
	case Replay_Set_Residency_Frameupdate_Timer:
		//Header
		cmd.replay_set_frameupdate_timer.header.sub_type =
			DMUB_CMD__REPLAY_SET_RESIDENCY_FRAMEUPDATE_TIMER;
		cmd.replay_set_frameupdate_timer.header.payload_bytes =
			sizeof(struct dmub_rb_cmd_replay_set_frameupdate_timer) -
			sizeof(struct dmub_cmd_header);
		//Cmd Body
		cmd.replay_set_frameupdate_timer.data.panel_inst =
						cmd_element->panel_inst;
		cmd.replay_set_frameupdate_timer.data.enable =
						cmd_element->timer_data.enable;
		cmd.replay_set_frameupdate_timer.data.frameupdate_count =
						cmd_element->timer_data.frameupdate_count;
		break;
	case Replay_Set_Pseudo_VTotal:
		//Header
		cmd.replay_set_pseudo_vtotal.header.sub_type =
			DMUB_CMD__REPLAY_SET_PSEUDO_VTOTAL;
		cmd.replay_set_pseudo_vtotal.header.payload_bytes =
			sizeof(struct dmub_rb_cmd_replay_set_pseudo_vtotal) -
			sizeof(struct dmub_cmd_header);
		//Cmd Body
		cmd.replay_set_pseudo_vtotal.data.panel_inst =
			cmd_element->pseudo_vtotal_data.panel_inst;
		cmd.replay_set_pseudo_vtotal.data.vtotal =
			cmd_element->pseudo_vtotal_data.vtotal;
		break;
	case Replay_Disabled_Adaptive_Sync_SDP:
		//Header
		cmd.replay_disabled_adaptive_sync_sdp.header.sub_type =
			DMUB_CMD__REPLAY_DISABLED_ADAPTIVE_SYNC_SDP;
		cmd.replay_disabled_adaptive_sync_sdp.header.payload_bytes =
			sizeof(struct dmub_rb_cmd_replay_disabled_adaptive_sync_sdp) -
			sizeof(struct dmub_cmd_header);
		//Cmd Body
		cmd.replay_disabled_adaptive_sync_sdp.data.panel_inst =
			cmd_element->disabled_adaptive_sync_sdp_data.panel_inst;
		cmd.replay_disabled_adaptive_sync_sdp.data.force_disabled =
			cmd_element->disabled_adaptive_sync_sdp_data.force_disabled;
		break;
	case Replay_Set_General_Cmd:
		//Header
		cmd.replay_set_general_cmd.header.sub_type =
			DMUB_CMD__REPLAY_SET_GENERAL_CMD;
		cmd.replay_set_general_cmd.header.payload_bytes =
			sizeof(struct dmub_rb_cmd_replay_set_general_cmd) -
			sizeof(struct dmub_cmd_header);
		//Cmd Body
		cmd.replay_set_general_cmd.data.panel_inst =
			cmd_element->set_general_cmd_data.panel_inst;
		cmd.replay_set_general_cmd.data.subtype =
			cmd_element->set_general_cmd_data.subtype;
		cmd.replay_set_general_cmd.data.param1 =
			cmd_element->set_general_cmd_data.param1;
		cmd.replay_set_general_cmd.data.param2 =
			cmd_element->set_general_cmd_data.param2;
		break;
	case Replay_Msg_Not_Support:
	default:
		return;
		break;
	}

	dc_wake_and_execute_dmub_cmd(ctx, &cmd, DM_DMUB_WAIT_TYPE_WAIT);
}

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,
	.replay_set_power_opt_and_coasting_vtotal	= dmub_replay_set_power_opt_and_coasting_vtotal,
	.replay_send_cmd				= dmub_replay_send_cmd,
};

/*
 * 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;
}