From 18c1923e13dc17219b0d3bd58a68f54eba566ecb Mon Sep 17 00:00:00 2001 From: Uwe Poeche Date: Wed, 12 Dec 2018 13:40:31 +0100 Subject: siemens/mc_apl4: Enable LVDS Display on mc_apl4 Enable PTN3460 chip initialization to get LVDS attached LCD working on mc_apl4. Change-Id: I3ccf5398f16831db321eba846d6b041daadf31dd Signed-off-by: Uwe Poeche Signed-off-by: Werner Zeh Reviewed-on: https://review.coreboot.org/c/30204 Tested-by: build bot (Jenkins) Reviewed-by: Mario Scheithauer --- .../siemens/mc_apl1/variants/mc_apl4/Makefile.inc | 2 + .../variants/mc_apl4/include/variant/ptn3460.h | 91 +++++++++++ .../siemens/mc_apl1/variants/mc_apl4/mainboard.c | 35 +++++ .../siemens/mc_apl1/variants/mc_apl4/ptn3460.c | 171 +++++++++++++++++++++ 4 files changed, 299 insertions(+) create mode 100644 src/mainboard/siemens/mc_apl1/variants/mc_apl4/include/variant/ptn3460.h create mode 100644 src/mainboard/siemens/mc_apl1/variants/mc_apl4/mainboard.c create mode 100644 src/mainboard/siemens/mc_apl1/variants/mc_apl4/ptn3460.c (limited to 'src/mainboard/siemens') diff --git a/src/mainboard/siemens/mc_apl1/variants/mc_apl4/Makefile.inc b/src/mainboard/siemens/mc_apl1/variants/mc_apl4/Makefile.inc index 0a124ceffb..482abf83dc 100644 --- a/src/mainboard/siemens/mc_apl1/variants/mc_apl4/Makefile.inc +++ b/src/mainboard/siemens/mc_apl1/variants/mc_apl4/Makefile.inc @@ -2,3 +2,5 @@ romstage-y += memory.c romstage-y += gpio.c ramstage-y += gpio.c +ramstage-y += mainboard.c +ramstage-y += ptn3460.c diff --git a/src/mainboard/siemens/mc_apl1/variants/mc_apl4/include/variant/ptn3460.h b/src/mainboard/siemens/mc_apl1/variants/mc_apl4/include/variant/ptn3460.h new file mode 100644 index 0000000000..bdcbf0e888 --- /dev/null +++ b/src/mainboard/siemens/mc_apl1/variants/mc_apl4/include/variant/ptn3460.h @@ -0,0 +1,91 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2014-2018 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 0x60 +#define PTN_I2C_CONTROLLER 7 + +#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; +} __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; +} __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_ */ diff --git a/src/mainboard/siemens/mc_apl1/variants/mc_apl4/mainboard.c b/src/mainboard/siemens/mc_apl1/variants/mc_apl4/mainboard.c new file mode 100644 index 0000000000..65e78bb378 --- /dev/null +++ b/src/mainboard/siemens/mc_apl1/variants/mc_apl4/mainboard.c @@ -0,0 +1,35 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2018 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. + */ + +#include +#include +#include +#include +#include + +void variant_mainboard_final(void) +{ + int status; + + /* + * Set up the DP2LVDS converter. + * ptn3460_init() may only be executed after i2c bus init. + */ + status = ptn3460_init("hwinfo.hex"); + if (status) + printk(BIOS_ERR, "LCD: Set up PTN with status 0x%x\n", status); + else + printk(BIOS_INFO, "LCD: Set up PTN was successful.\n"); +} diff --git a/src/mainboard/siemens/mc_apl1/variants/mc_apl4/ptn3460.c b/src/mainboard/siemens/mc_apl1/variants/mc_apl4/ptn3460.c new file mode 100644 index 0000000000..73d901935a --- /dev/null +++ b/src/mainboard/siemens/mc_apl1/variants/mc_apl4/ptn3460.c @@ -0,0 +1,171 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2014-2018 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. + */ + +#include +#include +#include +#include + +/* + * This function sets up the DP2LVDS-converter to be used with the appropriate + * lcd panel. + * + * @param *hwi_block Filename in CBFS of the block to use as HW-Info. + * @return 0 on success or HWI-Data/PTN error code. + */ +int ptn3460_init(const char *hwi_block) +{ + struct ptn_3460_config cfg; + int status; + uint8_t disp_con = 0, color_depth = 0; + uint8_t edid_data[PTN_EDID_LEN]; + int i; + + if (!hwi_block || hwilib_find_blocks(hwi_block) != CB_SUCCESS) { + printk(BIOS_ERR, "LCD: Info block \"%s\" not found!\n", + hwi_block); + return 1; + } + /* Get all needed information from hwinfo block. */ + if (hwilib_get_field(Edid, edid_data, sizeof(edid_data)) != + sizeof(edid_data)) { + printk(BIOS_ERR, "LCD: No EDID data available in %s\n", + hwi_block); + return 1; + } + if ((hwilib_get_field(PF_DisplCon, &disp_con, sizeof(disp_con)) != + sizeof(disp_con))) { + printk(BIOS_ERR, "LCD: Missing panel features from %s\n", + hwi_block); + return 1; + } + if (hwilib_get_field(PF_Color_Depth, &color_depth, sizeof(color_depth)) + != sizeof(color_depth)) { + printk(BIOS_ERR, "LCD: Missing panel features from %s\n", + hwi_block); + return 1; + } + /* + * Here, all the desired information for setting up DP2LVDS converter + * is present. Inside the converter, table 6 will be used for the + * timings. + */ + status = ptn3460_write_edid(6, edid_data); + if (status) + return status; + /* Select this table to be emulated. */ + ptn_select_edid(6); + /* Read PTN configuration data. */ + status = i2c_read_bytes(PTN_I2C_CONTROLLER, PTN_SLAVE_ADR, + PTN_CONFIG_OFF, (uint8_t *)&cfg, + sizeof(cfg)); + if (status) + return (PTN_BUS_ERROR | status); + /* Set up configuration data according to the hwinfo block we get. */ + cfg.dp_interface_ctrl = 0; + /* Use odd-bus for clock distribution only. */ + cfg.lvds_interface_ctrl1 = 0x01; + if (disp_con == PF_DISPLCON_LVDS_DUAL) + /* Turn on dual LVDS lane and clock. */ + cfg.lvds_interface_ctrl1 |= 0x0b; + if (color_depth == PF_COLOR_DEPTH_6BIT) + /* Use 18 bits per pixel. */ + cfg.lvds_interface_ctrl1 |= 0x20; + + /* No clock spreading, 300 mV LVDS swing. */ + cfg.lvds_interface_ctrl2 = 0x03; + /* Swap LVDS signal (N vs. P). */ + cfg.lvds_interface_ctrl3 = 0x04; + /* Delay T2 (VDD to LVDS active) by 16 ms. */ + cfg.t2_delay = 1; + /* 250 ms from LVDS to backlight active. */ + cfg.t3_timing = 10; + /* 1 second re-power delay. */ + cfg.t12_timing = 20; + /* 150 ms backlight off to LVDS inactive. */ + cfg.t4_timing = 3; + /* Delay T5 (LVDS to VDD inactive) by 16 ms. */ + cfg.t5_delay = 1; + /* Enable backlight control. */ + cfg.backlight_ctrl = 0; + + /* Write back configuration data to PTN3460. */ + for (i = 0; i < sizeof(struct ptn_3460_config); i++) { + status = i2c_writeb(PTN_I2C_CONTROLLER, PTN_SLAVE_ADR, + PTN_CONFIG_OFF+i, + *(((uint8_t *)&cfg)+i)); + if (status) + return (PTN_BUS_ERROR | status); + } + + return PTN_NO_ERROR; +} + +/* + * This function writes one Extended Display Identification Data (EDID) + * structure to PTN3460. + * + * @param edid_num Number of EDID that must be written (0..6). + * @param *data Pointer to a buffer where data to write is stored in. + * @return 0 on success or error code. + */ +int ptn3460_write_edid(uint8_t edid_num, const uint8_t data[PTN_EDID_LEN]) +{ + int status; + int i; + + if (edid_num > PTN_MAX_EDID_NUM) + return PTN_INVALID_EDID; + + /* First enable access to the desired EDID table. */ + status = i2c_writeb(PTN_I2C_CONTROLLER, PTN_SLAVE_ADR, + PTN_CONFIG_OFF + 5, edid_num); + if (status) + return (PTN_BUS_ERROR | status); + + /* Now we can simply write EDID-data to ptn3460. */ + for (i = 0; i < PTN_EDID_LEN; i++) { + status = i2c_writeb(PTN_I2C_CONTROLLER, PTN_SLAVE_ADR, + PTN_EDID_OFF + i, data[i]); + if (status) + return (PTN_BUS_ERROR | status); + } + + return PTN_NO_ERROR; +} + +/* + * This function selects one of 7 EDID-tables inside PTN3460 which should be + * emulated on DisplayPort and turn emulation ON. + * + * @param edid_num Number of EDID to emulate (0..6). + * @return 0 on success or error code. + */ +int ptn_select_edid(uint8_t edid_num) +{ + int status; + uint8_t val; + + if (edid_num > PTN_MAX_EDID_NUM) + return PTN_INVALID_EDID; + /* Enable emulation of the desired EDID table. */ + val = (edid_num << 1) | 1; + status = i2c_writeb(PTN_I2C_CONTROLLER, PTN_SLAVE_ADR, + PTN_CONFIG_OFF + 4, val); + if (status) + return (PTN_BUS_ERROR | status); + else + return PTN_NO_ERROR; +} -- cgit v1.2.3