From 956a9f6a9cf0e51c9155738baa566b192897648f Mon Sep 17 00:00:00 2001 From: Mario Scheithauer Date: Wed, 29 Mar 2017 17:09:37 +0200 Subject: siemens/mc_apl1: Activate PTN3460 eDP to LVDS bridge IC This mainboard uses a LVDS connection for LCD panels. Apollo Lake SoC provides a display controller with three independent pipes (1x eDP and 2x DP/HDMI). PTN3460 is an embedded DisplayPort to LVDS bridge device that enables connectivity between an eDP source and LVDS display panel (http://www.nxp.com/documents/data_sheet/PTN3460.pdf). The bridge contains an On-chip Extended Display Identification Data (EDIT) emulation for EDIT data structures. This patch sets up PTN3460 to be used with the appropriate LCD panel. Change-Id: Ib8fa79bb608f1842f26c1af3d7bf4bb0513fa94d Signed-off-by: Mario Scheithauer Reviewed-on: https://review.coreboot.org/19043 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin --- src/mainboard/siemens/mc_apl1/ptn3460.h | 91 +++++++++++++++++++++++++++++++++ 1 file changed, 91 insertions(+) create mode 100644 src/mainboard/siemens/mc_apl1/ptn3460.h (limited to 'src/mainboard/siemens/mc_apl1/ptn3460.h') diff --git a/src/mainboard/siemens/mc_apl1/ptn3460.h b/src/mainboard/siemens/mc_apl1/ptn3460.h new file mode 100644 index 0000000000..db6310bcd2 --- /dev/null +++ b/src/mainboard/siemens/mc_apl1/ptn3460.h @@ -0,0 +1,91 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2014-2017 Siemens AG + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef PTN3460_H_ +#define PTN3460_H_ + +#include + +#define PTN_SLAVE_ADR 0x20 +#define PTN_I2C_CONTROLLER 0 + +#define PTN_EDID_OFF 0x00 +#define PTN_EDID_LEN 0x80 +#define PTN_CONFIG_OFF 0x80 +#define PTN_FLASH_CFG_OFF 0xE8 +#define PTN_FLASH_CFG_LEN 0x04 +#define PTN_MAX_EDID_NUM 6 + +/* Define some error codes that can be used. */ +#define PTN_NO_ERROR 0x00000000 +#define PTN_BUS_ERROR 0x10000000 +#define PTN_INVALID_EDID 0x20000000 + +struct ptn_3460_config { + /* DiplayPort interface control. */ + uint8_t dp_interface_ctrl; + /* LVDS interface control register 1. */ + uint8_t lvds_interface_ctrl1; + /* LVDS interface control register 2. */ + uint8_t lvds_interface_ctrl2; + /* LVDS interface control register 3. */ + uint8_t lvds_interface_ctrl3; + /* Select which EDID-block is emulated. */ + uint8_t edid_rom_emulation; + /* Select which EDID block to map to 0..0x7F. */ + uint8_t edid_rom_access_ctrl; + /* Smallest PWM frequency for back light. */ + uint8_t pwm_min[3]; + /* Biggest PWM frequency for back light. */ + uint8_t pwm_max[3]; + /* Fast link training control register. */ + uint8_t fast_link_ctrl; + /* Pin configuration control register 1. */ + uint8_t pin_cfg_ctrl1; + /* Pin configuration control register 2. */ + uint8_t pin_cfg_ctrl2; + /* Default PWM bit count in DPCD register. */ + uint8_t pwm_default; + /* Current PWM bit count in DPCD register. */ + uint16_t pwm_value; + /* Default PWM frequency in DPCD register. */ + uint8_t pwm_default_freq; + /* Panel T3 timing value. */ + uint8_t t3_timing; + /* Panel T12 timing value. */ + uint8_t t12_timing; + /* Back light control register. */ + uint8_t backlight_ctrl; + /* Panel T2 delay. */ + uint8_t t2_delay; + /* Panel T4 timing value. */ + uint8_t t4_timing; + /* Panel T5 delay. */ + uint8_t t5_delay; +} __attribute__((packed)); + +struct ptn_3460_flash { + /* Flash command (erase or erase and flash). */ + uint8_t cmd; + /* Magic number needed by the flash algorithm. */ + uint16_t magic; + /* Trigger for starting flash operation. */ + uint8_t trigger; +} __attribute__((packed)); + +int ptn3460_init(const char *hwi_block); +int ptn3460_write_edid(uint8_t edid_num, const uint8_t data[PTN_EDID_LEN]); +int ptn_select_edid(uint8_t edid_num); +#endif /* PTN3460_H_ */ -- cgit v1.2.3