src/soc/qualcomm/sc7280/display/edp_phy_7nm.c

/* SPDX-License-Identifier: GPL-2.0-only */

#include <console/console.h>
#include <device/mmio.h>
#include <edid.h>
#include <soc/clock.h>
#include <soc/display/edp_reg.h>
#include <soc/display/edp_phy.h>
#include <string.h>
#include <timer.h>

static void edp_phy_ssc_en(bool en)
{
	if (en) {
		write32(&edp_phy_pll->qserdes_com_ssc_en_center, 0x01);
		write32(&edp_phy_pll->qserdes_com_ssc_adj_per1, 0x00);
		write32(&edp_phy_pll->qserdes_com_ssc_per1, 0x36);
		write32(&edp_phy_pll->qserdes_com_ssc_per2, 0x01);
		write32(&edp_phy_pll->qserdes_com_ssc_step_size1_mode0, 0x5c);
		write32(&edp_phy_pll->qserdes_com_ssc_step_size2_mode0, 0x08);
	} else {
		write32(&edp_phy_pll->qserdes_com_ssc_en_center, 0x00);
	}
}

int edp_phy_enable(void)
{
	write32(&edp_phy->pd_ctl, 0x7D);
	write32(&edp_phy_pll->qserdes_com_bias_en_clkbuflr_en, 0x17);
	write32(&edp_phy->aux_cfg[1], 0x13);
	write32(&edp_phy->aux_cfg[2], 0x24);
	write32(&edp_phy->aux_cfg[3], 0x00);
	write32(&edp_phy->aux_cfg[4], 0x0a);
	write32(&edp_phy->aux_cfg[5], 0x26);
	write32(&edp_phy->aux_cfg[6], 0x0a);
	write32(&edp_phy->aux_cfg[7], 0x03);
	write32(&edp_phy->aux_cfg[8], 0x37);
	write32(&edp_phy->aux_cfg[9], 0x03);
	write32(&edp_phy->aux_interrupt_mask, 0x1f);
	write32(&edp_phy->mode, 0xFC);

	if (!wait_us(1000, read32(&edp_phy_pll->qserdes_com_cmn_status) & BIT(7)))
		printk(BIOS_ERR, "%s: refgen not ready : 0x%x\n", __func__,
		       read32(&edp_phy_pll->qserdes_com_cmn_status));

	write32(&edp_phy_lane_tx0->tx_ldo_config, 0x01);
	write32(&edp_phy_lane_tx1->tx_ldo_config, 0x01);
	write32(&edp_phy_lane_tx0->tx_lane_mode1, 0x00);
	write32(&edp_phy_lane_tx1->tx_lane_mode1, 0x00);

	return 0;
}

static const u8 edp_hbr2_pre_emphasis[4][4] = {
	{0x0c, 0x15, 0x19, 0x1e},	/* pe0, 0 db */
	{0x08, 0x15, 0x19, 0xFF},	/* pe1, 3.5 db */
	{0x0e, 0x14, 0xFF, 0xFF},	/* pe2, 6.0 db */
	{0x0d, 0xFF, 0xFF, 0xFF}	/* pe3, 9.5 db */
};

static const u8 edp_hbr2_voltage_swing[4][4] = {
	{0xb, 0x11, 0x17, 0x1c}, /* sw0, 0.4v  */
	{0x10, 0x19, 0x1f, 0xFF}, /* sw1, 0.6 v */
	{0x19, 0x1F, 0xFF, 0xFF}, /* sw1, 0.8 v */
	{0x1f, 0xFF, 0xFF, 0xFF}  /* sw1, 1.2 v, optional */
};

void edp_phy_vm_pe_init(void)
{
	write32(&edp_phy_lane_tx0->tx_drv_lvl, edp_hbr2_voltage_swing[0][0]);
	write32(&edp_phy_lane_tx0->tx_emp_post1_lvl,
		edp_hbr2_pre_emphasis[0][0]);
	write32(&edp_phy_lane_tx1->tx_drv_lvl, edp_hbr2_voltage_swing[0][0]);
	write32(&edp_phy_lane_tx1->tx_emp_post1_lvl,
		edp_hbr2_pre_emphasis[0][0]);

	write32(&edp_phy_lane_tx0->tx_highz_drvr_en, 4);
	write32(&edp_phy_lane_tx0->tx_transceiver_bias_en, 3);
	write32(&edp_phy_lane_tx1->tx_highz_drvr_en, 7);
	write32(&edp_phy_lane_tx1->tx_transceiver_bias_en, 0);
	write32(&edp_phy->cfg1, 3);
}

void edp_phy_config(u8 v_level, u8 p_level)
{
	write32(&edp_phy_lane_tx0->tx_drv_lvl,
		edp_hbr2_voltage_swing[v_level][p_level]);
	write32(&edp_phy_lane_tx0->tx_emp_post1_lvl,
		edp_hbr2_pre_emphasis[v_level][p_level]);
	write32(&edp_phy_lane_tx1->tx_drv_lvl,
		edp_hbr2_voltage_swing[v_level][p_level]);
	write32(&edp_phy_lane_tx1->tx_emp_post1_lvl,
		edp_hbr2_pre_emphasis[v_level][p_level]);
}

static void edp_phy_pll_vco_init(uint32_t link_rate)
{
	edp_phy_ssc_en(true);
	write32(&edp_phy_pll->qserdes_com_svs_mode_clk_sel, 0x01);
	write32(&edp_phy_pll->qserdes_com_sysclk_en_sel, 0x0b);
	write32(&edp_phy_pll->qserdes_com_sys_clk_ctrl, 0x02);
	write32(&edp_phy_pll->qserdes_com_clk_enable1, 0x0c);
	write32(&edp_phy_pll->qserdes_com_sysclk_buf_enable, 0x06);
	write32(&edp_phy_pll->qserdes_com_clk_sel, 0x30);
	write32(&edp_phy_pll->qserdes_com_pll_ivco, 0x07);
	write32(&edp_phy_pll->qserdes_com_lock_cmp_en, 0x04);
	write32(&edp_phy_pll->qserdes_com_pll_cctrl_mode0, 0x36);
	write32(&edp_phy_pll->qserdes_com_pll_rctrl_mode0, 0x16);
	write32(&edp_phy_pll->qserdes_com_cp_ctrl_mode0, 0x06);
	write32(&edp_phy_pll->qserdes_com_div_frac_start1_mode0, 0x00);
	write32(&edp_phy_pll->qserdes_com_cmn_config, 0x02);
	write32(&edp_phy_pll->qserdes_com_integloop_gain0_mode0, 0x3f);
	write32(&edp_phy_pll->qserdes_com_integloop_gain1_mode0, 0x00);
	write32(&edp_phy_pll->qserdes_com_vco_tune_map, 0x00);
	write32(&edp_phy_pll->qserdes_com_bg_timer, 0x0a);
	write32(&edp_phy_pll->qserdes_com_coreclk_div_mode0, 0x14);
	write32(&edp_phy_pll->qserdes_com_vco_tune_ctrl, 0x00);
	write32(&edp_phy_pll->qserdes_com_bias_en_clkbuflr_en, 0x17);
	write32(&edp_phy_pll->qserdes_com_core_clk_en, 0x0f);

	switch (link_rate) {
	case 162000:
		write32(&edp_phy_pll->qserdes_com_hsclk_sel, 0x05);
		write32(&edp_phy_pll->qserdes_com_dec_start_mode0, 0x69);
		write32(&edp_phy_pll->qserdes_com_div_frac_start2_mode0, 0x80);
		write32(&edp_phy_pll->qserdes_com_div_frac_start3_mode0, 0x07);
		write32(&edp_phy_pll->qserdes_com_lock_cmp1_mode0, 0x6f);
		write32(&edp_phy_pll->qserdes_com_lock_cmp2_mode0, 0x08);
		write32(&edp_phy_pll->qserdes_com_vco_tune1_mode0, 0xa0);
		write32(&edp_phy_pll->qserdes_com_vco_tune2_mode0, 0x03);
		break;
	case 216000:
		write32(&edp_phy_pll->qserdes_com_hsclk_sel, 0x04);
		write32(&edp_phy_pll->qserdes_com_dec_start_mode0, 0x70);
		write32(&edp_phy_pll->qserdes_com_div_frac_start2_mode0, 0x00);
		write32(&edp_phy_pll->qserdes_com_div_frac_start3_mode0, 0x08);
		write32(&edp_phy_pll->qserdes_com_lock_cmp1_mode0, 0x3f);
		write32(&edp_phy_pll->qserdes_com_lock_cmp2_mode0, 0x0b);
		write32(&edp_phy_pll->qserdes_com_vco_tune1_mode0, 0x34);
		write32(&edp_phy_pll->qserdes_com_vco_tune2_mode0, 0x03);
		break;
	case 243000:
		write32(&edp_phy_pll->qserdes_com_hsclk_sel, 0x04);
		write32(&edp_phy_pll->qserdes_com_dec_start_mode0, 0x7e);
		write32(&edp_phy_pll->qserdes_com_div_frac_start2_mode0, 0x00);
		write32(&edp_phy_pll->qserdes_com_div_frac_start3_mode0, 0x09);
		write32(&edp_phy_pll->qserdes_com_lock_cmp1_mode0, 0xa7);
		write32(&edp_phy_pll->qserdes_com_lock_cmp2_mode0, 0x0c);
		write32(&edp_phy_pll->qserdes_com_vco_tune1_mode0, 0x5c);
		write32(&edp_phy_pll->qserdes_com_vco_tune2_mode0, 0x02);
		break;
	case 270000:
		write32(&edp_phy_pll->qserdes_com_hsclk_sel, 0x03);
		write32(&edp_phy_pll->qserdes_com_dec_start_mode0, 0x69);
		write32(&edp_phy_pll->qserdes_com_div_frac_start2_mode0, 0x80);
		write32(&edp_phy_pll->qserdes_com_div_frac_start3_mode0, 0x07);
		write32(&edp_phy_pll->qserdes_com_lock_cmp1_mode0, 0x0f);
		write32(&edp_phy_pll->qserdes_com_lock_cmp2_mode0, 0x0e);
		write32(&edp_phy_pll->qserdes_com_vco_tune1_mode0, 0xa0);
		write32(&edp_phy_pll->qserdes_com_vco_tune2_mode0, 0x03);
		break;
	case 324000:
		write32(&edp_phy_pll->qserdes_com_hsclk_sel, 0x03);
		write32(&edp_phy_pll->qserdes_com_dec_start_mode0, 0x7e);
		write32(&edp_phy_pll->qserdes_com_div_frac_start2_mode0, 0x00);
		write32(&edp_phy_pll->qserdes_com_div_frac_start3_mode0, 0x09);
		write32(&edp_phy_pll->qserdes_com_lock_cmp1_mode0, 0xdf);
		write32(&edp_phy_pll->qserdes_com_lock_cmp2_mode0, 0x10);
		write32(&edp_phy_pll->qserdes_com_vco_tune1_mode0, 0x5c);
		write32(&edp_phy_pll->qserdes_com_vco_tune2_mode0, 0x02);
		break;
	case 432000:
		write32(&edp_phy_pll->qserdes_com_hsclk_sel, 0x01);
		write32(&edp_phy_pll->qserdes_com_dec_start_mode0, 0x70);
		write32(&edp_phy_pll->qserdes_com_div_frac_start2_mode0, 0x00);
		write32(&edp_phy_pll->qserdes_com_div_frac_start3_mode0, 0x08);
		write32(&edp_phy_pll->qserdes_com_lock_cmp1_mode0, 0x7f);
		write32(&edp_phy_pll->qserdes_com_lock_cmp2_mode0, 0x16);
		write32(&edp_phy_pll->qserdes_com_vco_tune1_mode0, 0x34);
		write32(&edp_phy_pll->qserdes_com_vco_tune2_mode0, 0x03);
		break;
	case 540000:
		write32(&edp_phy_pll->qserdes_com_hsclk_sel, 0x01);
		write32(&edp_phy_pll->qserdes_com_dec_start_mode0, 0x8c);
		write32(&edp_phy_pll->qserdes_com_div_frac_start2_mode0, 0x00);
		write32(&edp_phy_pll->qserdes_com_div_frac_start3_mode0, 0x0a);
		write32(&edp_phy_pll->qserdes_com_lock_cmp1_mode0, 0x1f);
		write32(&edp_phy_pll->qserdes_com_lock_cmp2_mode0, 0x1c);
		write32(&edp_phy_pll->qserdes_com_vco_tune1_mode0, 0x84);
		write32(&edp_phy_pll->qserdes_com_vco_tune2_mode0, 0x01);
		break;
	case 594000:
		write32(&edp_phy_pll->qserdes_com_hsclk_sel, 0x01);
		write32(&edp_phy_pll->qserdes_com_dec_start_mode0, 0x9a);
		write32(&edp_phy_pll->qserdes_com_div_frac_start2_mode0, 0x00);
		write32(&edp_phy_pll->qserdes_com_div_frac_start3_mode0, 0x0b);
		write32(&edp_phy_pll->qserdes_com_lock_cmp1_mode0, 0xef);
		write32(&edp_phy_pll->qserdes_com_lock_cmp2_mode0, 0x1e);
		write32(&edp_phy_pll->qserdes_com_vco_tune1_mode0, 0xac);
		write32(&edp_phy_pll->qserdes_com_vco_tune2_mode0, 0x00);
		break;
	case 810000:
		write32(&edp_phy_pll->qserdes_com_hsclk_sel, 0x00);
		write32(&edp_phy_pll->qserdes_com_dec_start_mode0, 0x69);
		write32(&edp_phy_pll->qserdes_com_div_frac_start2_mode0, 0x80);
		write32(&edp_phy_pll->qserdes_com_div_frac_start3_mode0, 0x07);
		write32(&edp_phy_pll->qserdes_com_lock_cmp1_mode0, 0x2f);
		write32(&edp_phy_pll->qserdes_com_lock_cmp2_mode0, 0x2a);
		write32(&edp_phy_pll->qserdes_com_vco_tune1_mode0, 0xa0);
		write32(&edp_phy_pll->qserdes_com_vco_tune2_mode0, 0x03);
		break;
	default:
		printk(BIOS_ERR, "%s: Invalid link rate. rate = %u\n", __func__,
		       link_rate);
		break;
	}
}

static void edp_phy_lanes_init(void)
{
	write32(&edp_phy_lane_tx0->tx_transceiver_bias_en, 0x03);
	write32(&edp_phy_lane_tx0->tx_clk_buf_enable, 0x0f);
	write32(&edp_phy_lane_tx0->tx_reset_tsync_en, 0x03);
	write32(&edp_phy_lane_tx0->tx_tran_drvr_emp_en, 0x01);
	write32(&edp_phy_lane_tx0->tx_tx_band, 0x4);

	write32(&edp_phy_lane_tx1->tx_transceiver_bias_en, 0x03);
	write32(&edp_phy_lane_tx1->tx_clk_buf_enable, 0x0f);
	write32(&edp_phy_lane_tx1->tx_reset_tsync_en, 0x03);
	write32(&edp_phy_lane_tx1->tx_tran_drvr_emp_en, 0x01);
	write32(&edp_phy_lane_tx1->tx_tx_band, 0x4);
}

static void edp_lanes_configure(void)
{
	write32(&edp_phy_lane_tx0->tx_highz_drvr_en, 0x1f);
	write32(&edp_phy_lane_tx0->tx_highz_drvr_en, 0x04);
	write32(&edp_phy_lane_tx0->tx_tx_pol_inv, 0x00);

	write32(&edp_phy_lane_tx1->tx_highz_drvr_en, 0x1f);
	write32(&edp_phy_lane_tx1->tx_highz_drvr_en, 0x04);
	write32(&edp_phy_lane_tx1->tx_tx_pol_inv, 0x00);

	write32(&edp_phy_lane_tx1->tx_highz_drvr_en, 0x04);
	write32(&edp_phy_lane_tx1->tx_tx_pol_inv, 0x00);

	write32(&edp_phy_lane_tx0->tx_drv_lvl_offset, 0x10);
	write32(&edp_phy_lane_tx1->tx_drv_lvl_offset, 0x10);

	write32(&edp_phy_lane_tx0->tx_rescode_lane_offset_tx0, 0x11);
	write32(&edp_phy_lane_tx0->tx_rescode_lane_offset_tx1, 0x11);

	write32(&edp_phy_lane_tx1->tx_rescode_lane_offset_tx0, 0x11);
	write32(&edp_phy_lane_tx1->tx_rescode_lane_offset_tx1, 0x11);
}

static int edp_phy_pll_vco_configure(uint32_t link_rate)
{
	u32 phy_vco_div = 0;

	switch (link_rate) {
	case 162000:
		phy_vco_div = 2;
	break;
	case 216000:
	case 243000:
	case 270000:
		phy_vco_div = 1;
	break;
	case 324000:
	case 432000:
	case 540000:
		phy_vco_div = 2;
	break;
	case 594000:
	case 810000:
		phy_vco_div = 0;
	break;
	default:
		printk(BIOS_ERR, "%s: Invalid link rate. rate = %u\n", __func__,
		       link_rate);
	break;
	}

	write32(&edp_phy->vco_div, phy_vco_div);
	write32(&edp_phy->cfg, 0x01);
	write32(&edp_phy->cfg, 0x05);
	write32(&edp_phy->cfg, 0x01);
	write32(&edp_phy->cfg, 0x09);
	write32(&edp_phy_pll->qserdes_com_resetsm_cntrl, 0x20);
	if (!wait_us(10000, read32(&edp_phy_pll->qserdes_com_c_ready_status) & BIT(0))) {
		printk(BIOS_ERR, "%s: PLL not locked. Status\n", __func__);
		return -1;
	}

	write32(&edp_phy->cfg, 0x19);
	edp_lanes_configure();
	edp_phy_vm_pe_init();
	if (!wait_us(10000, read32(&edp_phy->status) & BIT(1))) {
		printk(BIOS_ERR, "%s: PHY not ready. Status\n", __func__);
		return -1;
	}

	write32(&edp_phy->cfg, 0x18);
	write32(&edp_phy->cfg, 0x19);
	if (!wait_us(10000, read32(&edp_phy_pll->qserdes_com_c_ready_status) & BIT(0))) {
		printk(BIOS_ERR, "%s: PLL not locked. Status\n", __func__);
		return -1;
	}

	return 0;
}

int edp_phy_power_on(uint32_t link_rate)
{
	int ret = 0;
	edp_phy_pll_vco_init(link_rate);

	write32(&edp_phy->tx0_tx1_lane_ctl, 0x5);
	write32(&edp_phy->tx2_tx3_lane_ctl, 0x5);
	edp_phy_lanes_init();
	ret = edp_phy_pll_vco_configure(link_rate);

	return ret;
}