diff options
Diffstat (limited to 'src/mainboard/siemens/mc_apl1/variants/mc_apl4/lcd_panel.c')
-rw-r--r-- | src/mainboard/siemens/mc_apl1/variants/mc_apl4/lcd_panel.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/src/mainboard/siemens/mc_apl1/variants/mc_apl4/lcd_panel.c b/src/mainboard/siemens/mc_apl1/variants/mc_apl4/lcd_panel.c new file mode 100644 index 0000000000..abfcfe37a8 --- /dev/null +++ b/src/mainboard/siemens/mc_apl1/variants/mc_apl4/lcd_panel.c @@ -0,0 +1,103 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2014-2019 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 <console/console.h> +#include <device/device.h> +#include <drivers/i2c/ptn3460/ptn3460.h> +#include <hwilib.h> +#include <types.h> + +/** \brief This function provides EDID data to the driver for DP2LVDS Bridge (PTN3460) + * @param edid_data pointer to EDID data in driver +*/ +enum cb_err mb_get_edid(uint8_t edid_data[0x80]) +{ + const char *hwi_block = "hwinfo.hex"; + + if (hwilib_find_blocks(hwi_block) != CB_SUCCESS) { + printk(BIOS_ERR, "LCD: Info block \"%s\" not found!\n", hwi_block); + return CB_ERR; + } + + /* Get EDID data from hwinfo block */ + if (hwilib_get_field(Edid, edid_data, PTN_EDID_LEN) != PTN_EDID_LEN) { + printk(BIOS_ERR, "LCD: No EDID data available in %s\n", hwi_block); + return CB_ERR; + } + return CB_SUCCESS; +} + +/** \brief This function provides EDID block [0..6] to the driver for DP2LVDS Bridge (PTN3460) + * which has to be used. +*/ +uint8_t mb_select_edid_table(void) +{ + return 6; /* With this mainboard we use EDID block 6 for emulation in PTN3460. */ +} + +/** \brief Function to enable mainboard to adjust the config data of PTN3460. + * @param *cfg_ptr Pointer to the PTN config structure to modify. + * @return -1 on error; PTN_CFG_MODIFIED if data was modified and needs to be updated. +*/ +int mb_adjust_cfg(struct ptn_3460_config *cfg) +{ + const char *hwi_block = "hwinfo.hex"; + uint8_t disp_con = 0, color_depth = 0; + + if (hwilib_find_blocks(hwi_block) != CB_SUCCESS) { + printk(BIOS_ERR, "LCD: Info block \"%s\" not found!\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; + } + /* Set up configuration data according to the hwinfo block we got. */ + cfg->dp_interface_ctrl = 0x00; + /* 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 lanes (N vs. P). */ + cfg->lvds_interface_ctrl3 = 0x04; + /* Delay T2 (VDD to LVDS active) by 16 ms. */ + cfg->t2_delay = 1; + /* 500 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; + + return PTN_CFG_MODIFIED; +} |