/*
 * Copyright 2019-2021 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
 *
 */
#include "resource.h"
#include "clk_mgr.h"
#include "dcn20/dcn20_resource.h"
#include "dcn301/dcn301_resource.h"
#include "clk_mgr/dcn301/vg_clk_mgr.h"

#include "dml/dcn20/dcn20_fpu.h"
#include "dcn301_fpu.h"

#define TO_DCN301_RES_POOL(pool)\
	container_of(pool, struct dcn301_resource_pool, base)

/* Based on: //vidip/dc/dcn3/doc/architecture/DCN3x_Display_Mode.xlsm#83 */
struct _vcs_dpi_ip_params_st dcn3_01_ip = {
	.odm_capable = 1,
	.gpuvm_enable = 1,
	.hostvm_enable = 1,
	.gpuvm_max_page_table_levels = 1,
	.hostvm_max_page_table_levels = 2,
	.hostvm_cached_page_table_levels = 0,
	.pte_group_size_bytes = 2048,
	.num_dsc = 3,
	.rob_buffer_size_kbytes = 184,
	.det_buffer_size_kbytes = 184,
	.dpte_buffer_size_in_pte_reqs_luma = 64,
	.dpte_buffer_size_in_pte_reqs_chroma = 32,
	.pde_proc_buffer_size_64k_reqs = 48,
	.dpp_output_buffer_pixels = 2560,
	.opp_output_buffer_lines = 1,
	.pixel_chunk_size_kbytes = 8,
	.meta_chunk_size_kbytes = 2,
	.writeback_chunk_size_kbytes = 8,
	.line_buffer_size_bits = 789504,
	.is_line_buffer_bpp_fixed = 0,  // ?
	.line_buffer_fixed_bpp = 48,     // ?
	.dcc_supported = true,
	.writeback_interface_buffer_size_kbytes = 90,
	.writeback_line_buffer_buffer_size = 656640,
	.max_line_buffer_lines = 12,
	.writeback_luma_buffer_size_kbytes = 12,  // writeback_line_buffer_buffer_size = 656640
	.writeback_chroma_buffer_size_kbytes = 8,
	.writeback_chroma_line_buffer_width_pixels = 4,
	.writeback_max_hscl_ratio = 1,
	.writeback_max_vscl_ratio = 1,
	.writeback_min_hscl_ratio = 1,
	.writeback_min_vscl_ratio = 1,
	.writeback_max_hscl_taps = 1,
	.writeback_max_vscl_taps = 1,
	.writeback_line_buffer_luma_buffer_size = 0,
	.writeback_line_buffer_chroma_buffer_size = 14643,
	.cursor_buffer_size = 8,
	.cursor_chunk_size = 2,
	.max_num_otg = 4,
	.max_num_dpp = 4,
	.max_num_wb = 1,
	.max_dchub_pscl_bw_pix_per_clk = 4,
	.max_pscl_lb_bw_pix_per_clk = 2,
	.max_lb_vscl_bw_pix_per_clk = 4,
	.max_vscl_hscl_bw_pix_per_clk = 4,
	.max_hscl_ratio = 6,
	.max_vscl_ratio = 6,
	.hscl_mults = 4,
	.vscl_mults = 4,
	.max_hscl_taps = 8,
	.max_vscl_taps = 8,
	.dispclk_ramp_margin_percent = 1,
	.underscan_factor = 1.11,
	.min_vblank_lines = 32,
	.dppclk_delay_subtotal = 46,
	.dynamic_metadata_vm_enabled = true,
	.dppclk_delay_scl_lb_only = 16,
	.dppclk_delay_scl = 50,
	.dppclk_delay_cnvc_formatter = 27,
	.dppclk_delay_cnvc_cursor = 6,
	.dispclk_delay_subtotal = 119,
	.dcfclk_cstate_latency = 5.2, // SRExitTime
	.max_inter_dcn_tile_repeaters = 8,
	.max_num_hdmi_frl_outputs = 0,
	.odm_combine_4to1_supported = true,

	.xfc_supported = false,
	.xfc_fill_bw_overhead_percent = 10.0,
	.xfc_fill_constant_bytes = 0,
	.gfx7_compat_tiling_supported = 0,
	.number_of_cursors = 1,
};

struct _vcs_dpi_soc_bounding_box_st dcn3_01_soc = {
	.clock_limits = {
		{
			.state = 0,
			.dram_speed_mts = 2400.0,
			.fabricclk_mhz = 600,
			.socclk_mhz = 278.0,
			.dcfclk_mhz = 400.0,
			.dscclk_mhz = 206.0,
			.dppclk_mhz = 1015.0,
			.dispclk_mhz = 1015.0,
			.phyclk_mhz = 600.0,
		},

		{
			.state = 1,
			.dram_speed_mts = 2400.0,
			.fabricclk_mhz = 688,
			.socclk_mhz = 278.0,
			.dcfclk_mhz = 400.0,
			.dscclk_mhz = 206.0,
			.dppclk_mhz = 1015.0,
			.dispclk_mhz = 1015.0,
			.phyclk_mhz = 600.0,
		},

		{
			.state = 2,
			.dram_speed_mts = 4267.0,
			.fabricclk_mhz = 1067,
			.socclk_mhz = 278.0,
			.dcfclk_mhz = 608.0,
			.dscclk_mhz = 296.0,
			.dppclk_mhz = 1015.0,
			.dispclk_mhz = 1015.0,
			.phyclk_mhz = 810.0,
		},

		{
			.state = 3,
			.dram_speed_mts = 4267.0,
			.fabricclk_mhz = 1067,
			.socclk_mhz = 715.0,
			.dcfclk_mhz = 676.0,
			.dscclk_mhz = 338.0,
			.dppclk_mhz = 1015.0,
			.dispclk_mhz = 1015.0,
			.phyclk_mhz = 810.0,
		},

		{
			.state = 4,
			.dram_speed_mts = 4267.0,
			.fabricclk_mhz = 1067,
			.socclk_mhz = 953.0,
			.dcfclk_mhz = 810.0,
			.dscclk_mhz = 338.0,
			.dppclk_mhz = 1015.0,
			.dispclk_mhz = 1015.0,
			.phyclk_mhz = 810.0,
		},
	},

	.sr_exit_time_us = 9.0,
	.sr_enter_plus_exit_time_us = 11.0,
	.urgent_latency_us = 4.0,
	.urgent_latency_pixel_data_only_us = 4.0,
	.urgent_latency_pixel_mixed_with_vm_data_us = 4.0,
	.urgent_latency_vm_data_only_us = 4.0,
	.urgent_out_of_order_return_per_channel_pixel_only_bytes = 4096,
	.urgent_out_of_order_return_per_channel_pixel_and_vm_bytes = 4096,
	.urgent_out_of_order_return_per_channel_vm_only_bytes = 4096,
	.pct_ideal_dram_sdp_bw_after_urgent_pixel_only = 80.0,
	.pct_ideal_dram_sdp_bw_after_urgent_pixel_and_vm = 75.0,
	.pct_ideal_dram_sdp_bw_after_urgent_vm_only = 40.0,
	.max_avg_sdp_bw_use_normal_percent = 60.0,
	.max_avg_dram_bw_use_normal_percent = 60.0,
	.writeback_latency_us = 12.0,
	.max_request_size_bytes = 256,
	.dram_channel_width_bytes = 4,
	.fabric_datapath_to_dcn_data_return_bytes = 32,
	.dcn_downspread_percent = 0.5,
	.downspread_percent = 0.38,
	.dram_page_open_time_ns = 50.0,
	.dram_rw_turnaround_time_ns = 17.5,
	.dram_return_buffer_per_channel_bytes = 8192,
	.round_trip_ping_latency_dcfclk_cycles = 191,
	.urgent_out_of_order_return_per_channel_bytes = 4096,
	.channel_interleave_bytes = 256,
	.num_banks = 8,
	.num_chans = 4,
	.gpuvm_min_page_size_bytes = 4096,
	.hostvm_min_page_size_bytes = 4096,
	.dram_clock_change_latency_us = 23.84,
	.writeback_dram_clock_change_latency_us = 23.0,
	.return_bus_width_bytes = 64,
	.dispclk_dppclk_vco_speed_mhz = 3550,
	.xfc_bus_transport_time_us = 20,      // ?
	.xfc_xbuf_latency_tolerance_us = 4,  // ?
	.use_urgent_burst_bw = 1,            // ?
	.num_states = 5,
	.do_urgent_latency_adjustment = false,
	.urgent_latency_adjustment_fabric_clock_component_us = 0,
	.urgent_latency_adjustment_fabric_clock_reference_mhz = 0,
};

struct wm_table ddr4_wm_table = {
	.entries = {
		{
			.wm_inst = WM_A,
			.wm_type = WM_TYPE_PSTATE_CHG,
			.pstate_latency_us = 11.72,
			.sr_exit_time_us = 6.09,
			.sr_enter_plus_exit_time_us = 7.14,
			.valid = true,
		},
		{
			.wm_inst = WM_B,
			.wm_type = WM_TYPE_PSTATE_CHG,
			.pstate_latency_us = 11.72,
			.sr_exit_time_us = 10.12,
			.sr_enter_plus_exit_time_us = 11.48,
			.valid = true,
		},
		{
			.wm_inst = WM_C,
			.wm_type = WM_TYPE_PSTATE_CHG,
			.pstate_latency_us = 11.72,
			.sr_exit_time_us = 10.12,
			.sr_enter_plus_exit_time_us = 11.48,
			.valid = true,
		},
		{
			.wm_inst = WM_D,
			.wm_type = WM_TYPE_PSTATE_CHG,
			.pstate_latency_us = 11.72,
			.sr_exit_time_us = 10.12,
			.sr_enter_plus_exit_time_us = 11.48,
			.valid = true,
		},
	}
};

struct wm_table lpddr5_wm_table = {
	.entries = {
		{
			.wm_inst = WM_A,
			.wm_type = WM_TYPE_PSTATE_CHG,
			.pstate_latency_us = 11.65333,
			.sr_exit_time_us = 13.5,
			.sr_enter_plus_exit_time_us = 16.5,
			.valid = true,
		},
		{
			.wm_inst = WM_B,
			.wm_type = WM_TYPE_PSTATE_CHG,
			.pstate_latency_us = 11.65333,
			.sr_exit_time_us = 13.5,
			.sr_enter_plus_exit_time_us = 16.5,
			.valid = true,
		},
		{
			.wm_inst = WM_C,
			.wm_type = WM_TYPE_PSTATE_CHG,
			.pstate_latency_us = 11.65333,
			.sr_exit_time_us = 13.5,
			.sr_enter_plus_exit_time_us = 16.5,
			.valid = true,
		},
		{
			.wm_inst = WM_D,
			.wm_type = WM_TYPE_PSTATE_CHG,
			.pstate_latency_us = 11.65333,
			.sr_exit_time_us = 13.5,
			.sr_enter_plus_exit_time_us = 16.5,
			.valid = true,
		},
	}
};

static void calculate_wm_set_for_vlevel(int vlevel,
		struct wm_range_table_entry *table_entry,
		struct dcn_watermarks *wm_set,
		struct display_mode_lib *dml,
		display_e2e_pipe_params_st *pipes,
		int pipe_cnt)
{
	double dram_clock_change_latency_cached = dml->soc.dram_clock_change_latency_us;

	ASSERT(vlevel < dml->soc.num_states);
	/* only pipe 0 is read for voltage and dcf/soc clocks */
	pipes[0].clks_cfg.voltage = vlevel;
	pipes[0].clks_cfg.dcfclk_mhz = dml->soc.clock_limits[vlevel].dcfclk_mhz;
	pipes[0].clks_cfg.socclk_mhz = dml->soc.clock_limits[vlevel].socclk_mhz;

	dml->soc.dram_clock_change_latency_us = table_entry->pstate_latency_us;
	dml->soc.sr_exit_time_us = table_entry->sr_exit_time_us;
	dml->soc.sr_enter_plus_exit_time_us = table_entry->sr_enter_plus_exit_time_us;

	wm_set->urgent_ns = get_wm_urgent(dml, pipes, pipe_cnt) * 1000;
	wm_set->cstate_pstate.cstate_enter_plus_exit_ns = get_wm_stutter_enter_exit(dml, pipes, pipe_cnt) * 1000;
	wm_set->cstate_pstate.cstate_exit_ns = get_wm_stutter_exit(dml, pipes, pipe_cnt) * 1000;
	wm_set->cstate_pstate.pstate_change_ns = get_wm_dram_clock_change(dml, pipes, pipe_cnt) * 1000;
	wm_set->pte_meta_urgent_ns = get_wm_memory_trip(dml, pipes, pipe_cnt) * 1000;
	wm_set->frac_urg_bw_nom = get_fraction_of_urgent_bandwidth(dml, pipes, pipe_cnt) * 1000;
	wm_set->frac_urg_bw_flip = get_fraction_of_urgent_bandwidth_imm_flip(dml, pipes, pipe_cnt) * 1000;
	wm_set->urgent_latency_ns = get_urgent_latency(dml, pipes, pipe_cnt) * 1000;
	dml->soc.dram_clock_change_latency_us = dram_clock_change_latency_cached;

}

void dcn301_fpu_update_bw_bounding_box(struct dc *dc, struct clk_bw_params *bw_params)
{
	struct _vcs_dpi_voltage_scaling_st *s = dc->scratch.update_bw_bounding_box.clock_limits;
	struct dcn301_resource_pool *pool = TO_DCN301_RES_POOL(dc->res_pool);
	struct clk_limit_table *clk_table = &bw_params->clk_table;
	unsigned int i, closest_clk_lvl;
	int j = 0, max_dispclk_mhz = 0, max_dppclk_mhz = 0;

	dc_assert_fp_enabled();

	memcpy(s, dcn3_01_soc.clock_limits, sizeof(dcn3_01_soc.clock_limits));

	/* Default clock levels are used for diags, which may lead to overclocking. */
	dcn3_01_ip.max_num_otg = pool->base.res_cap->num_timing_generator;
	dcn3_01_ip.max_num_dpp = pool->base.pipe_count;
	dcn3_01_soc.num_chans = bw_params->num_channels;

	ASSERT(clk_table->num_entries);

	/* Prepass to find max clocks independent of voltage level. */
	for (i = 0; i < clk_table->num_entries; ++i) {
		if (clk_table->entries[i].dispclk_mhz > max_dispclk_mhz)
			max_dispclk_mhz = clk_table->entries[i].dispclk_mhz;
		if (clk_table->entries[i].dppclk_mhz > max_dppclk_mhz)
			max_dppclk_mhz = clk_table->entries[i].dppclk_mhz;
	}

	for (i = 0; i < clk_table->num_entries; i++) {
		/* loop backwards*/
		for (closest_clk_lvl = 0, j = dcn3_01_soc.num_states - 1; j >= 0; j--) {
			if ((unsigned int) dcn3_01_soc.clock_limits[j].dcfclk_mhz <= clk_table->entries[i].dcfclk_mhz) {
				closest_clk_lvl = j;
				break;
			}
		}

		s[i].state = i;
		s[i].dcfclk_mhz = clk_table->entries[i].dcfclk_mhz;
		s[i].fabricclk_mhz = clk_table->entries[i].fclk_mhz;
		s[i].socclk_mhz = clk_table->entries[i].socclk_mhz;
		s[i].dram_speed_mts = clk_table->entries[i].memclk_mhz * 2;

		/* Clocks independent of voltage level. */
		s[i].dispclk_mhz = max_dispclk_mhz ? max_dispclk_mhz :
			dcn3_01_soc.clock_limits[closest_clk_lvl].dispclk_mhz;

		s[i].dppclk_mhz = max_dppclk_mhz ? max_dppclk_mhz :
			dcn3_01_soc.clock_limits[closest_clk_lvl].dppclk_mhz;

		s[i].dram_bw_per_chan_gbps =
			dcn3_01_soc.clock_limits[closest_clk_lvl].dram_bw_per_chan_gbps;
		s[i].dscclk_mhz = dcn3_01_soc.clock_limits[closest_clk_lvl].dscclk_mhz;
		s[i].dtbclk_mhz = dcn3_01_soc.clock_limits[closest_clk_lvl].dtbclk_mhz;
		s[i].phyclk_d18_mhz =
			dcn3_01_soc.clock_limits[closest_clk_lvl].phyclk_d18_mhz;
		s[i].phyclk_mhz = dcn3_01_soc.clock_limits[closest_clk_lvl].phyclk_mhz;
	}

	if (clk_table->num_entries) {
		dcn3_01_soc.num_states = clk_table->num_entries;
		/* duplicate last level */
		s[dcn3_01_soc.num_states] =
			dcn3_01_soc.clock_limits[dcn3_01_soc.num_states - 1];
		s[dcn3_01_soc.num_states].state = dcn3_01_soc.num_states;
	}

	memcpy(dcn3_01_soc.clock_limits, s, sizeof(dcn3_01_soc.clock_limits));

	dcn3_01_soc.dispclk_dppclk_vco_speed_mhz = dc->clk_mgr->dentist_vco_freq_khz / 1000.0;
	dc->dml.soc.dispclk_dppclk_vco_speed_mhz = dc->clk_mgr->dentist_vco_freq_khz / 1000.0;

	if ((int)(dcn3_01_soc.dram_clock_change_latency_us * 1000)
				!= dc->debug.dram_clock_change_latency_ns
			&& dc->debug.dram_clock_change_latency_ns) {
		dcn3_01_soc.dram_clock_change_latency_us = dc->debug.dram_clock_change_latency_ns / 1000.0;
	}
	dml_init_instance(&dc->dml, &dcn3_01_soc, &dcn3_01_ip, DML_PROJECT_DCN30);
}

void dcn301_fpu_set_wm_ranges(int i,
	struct pp_smu_wm_range_sets *ranges,
	struct _vcs_dpi_soc_bounding_box_st *loaded_bb)
{
	dc_assert_fp_enabled();

	ranges->reader_wm_sets[i].min_fill_clk_mhz = (i > 0) ? (loaded_bb->clock_limits[i - 1].dram_speed_mts / 16) + 1 : 0;
	ranges->reader_wm_sets[i].max_fill_clk_mhz = loaded_bb->clock_limits[i].dram_speed_mts / 16;
}

void dcn301_fpu_init_soc_bounding_box(struct bp_soc_bb_info bb_info)
{
	dc_assert_fp_enabled();

	if (bb_info.dram_clock_change_latency_100ns > 0)
		dcn3_01_soc.dram_clock_change_latency_us = bb_info.dram_clock_change_latency_100ns * 10;

	if (bb_info.dram_sr_enter_exit_latency_100ns > 0)
		dcn3_01_soc.sr_enter_plus_exit_time_us = bb_info.dram_sr_enter_exit_latency_100ns * 10;

	if (bb_info.dram_sr_exit_latency_100ns > 0)
		dcn3_01_soc.sr_exit_time_us = bb_info.dram_sr_exit_latency_100ns * 10;
}

void dcn301_fpu_calculate_wm_and_dlg(struct dc *dc,
		struct dc_state *context,
		display_e2e_pipe_params_st *pipes,
		int pipe_cnt,
		int vlevel_req)
{
	int i, pipe_idx;
	int vlevel, vlevel_max;
	struct wm_range_table_entry *table_entry;
	struct clk_bw_params *bw_params = dc->clk_mgr->bw_params;

	ASSERT(bw_params);
	dc_assert_fp_enabled();

	vlevel_max = bw_params->clk_table.num_entries - 1;

	/* WM Set D */
	table_entry = &bw_params->wm_table.entries[WM_D];
	if (table_entry->wm_type == WM_TYPE_RETRAINING)
		vlevel = 0;
	else
		vlevel = vlevel_max;
	calculate_wm_set_for_vlevel(vlevel, table_entry, &context->bw_ctx.bw.dcn.watermarks.d,
						&context->bw_ctx.dml, pipes, pipe_cnt);
	/* WM Set C */
	table_entry = &bw_params->wm_table.entries[WM_C];
	vlevel = min(max(vlevel_req, 2), vlevel_max);
	calculate_wm_set_for_vlevel(vlevel, table_entry, &context->bw_ctx.bw.dcn.watermarks.c,
						&context->bw_ctx.dml, pipes, pipe_cnt);
	/* WM Set B */
	table_entry = &bw_params->wm_table.entries[WM_B];
	vlevel = min(max(vlevel_req, 1), vlevel_max);
	calculate_wm_set_for_vlevel(vlevel, table_entry, &context->bw_ctx.bw.dcn.watermarks.b,
						&context->bw_ctx.dml, pipes, pipe_cnt);

	/* WM Set A */
	table_entry = &bw_params->wm_table.entries[WM_A];
	vlevel = min(vlevel_req, vlevel_max);
	calculate_wm_set_for_vlevel(vlevel, table_entry, &context->bw_ctx.bw.dcn.watermarks.a,
						&context->bw_ctx.dml, pipes, pipe_cnt);

	for (i = 0, pipe_idx = 0; i < dc->res_pool->pipe_count; i++) {
		if (!context->res_ctx.pipe_ctx[i].stream)
			continue;

		pipes[pipe_idx].clks_cfg.dispclk_mhz = get_dispclk_calculated(&context->bw_ctx.dml, pipes, pipe_cnt);
		pipes[pipe_idx].clks_cfg.dppclk_mhz = get_dppclk_calculated(&context->bw_ctx.dml, pipes, pipe_cnt, pipe_idx);

		if (dc->config.forced_clocks) {
			pipes[pipe_idx].clks_cfg.dispclk_mhz = context->bw_ctx.dml.soc.clock_limits[0].dispclk_mhz;
			pipes[pipe_idx].clks_cfg.dppclk_mhz = context->bw_ctx.dml.soc.clock_limits[0].dppclk_mhz;
		}
		if (dc->debug.min_disp_clk_khz > pipes[pipe_idx].clks_cfg.dispclk_mhz * 1000)
			pipes[pipe_idx].clks_cfg.dispclk_mhz = dc->debug.min_disp_clk_khz / 1000.0;
		if (dc->debug.min_dpp_clk_khz > pipes[pipe_idx].clks_cfg.dppclk_mhz * 1000)
			pipes[pipe_idx].clks_cfg.dppclk_mhz = dc->debug.min_dpp_clk_khz / 1000.0;
		pipe_idx++;
	}

	dcn20_calculate_dlg_params(dc, context, pipes, pipe_cnt, vlevel);
}
