src/mainboard/siemens: Use PTN3460 chip driver

This patch replaces and cleans up the redundant PTN3460 driver files in
/mainboard/siemens directories by using the now available driver in
src/drivers/i2c/ptn3460 and providing mainboard specific functions to
the driver.

TEST=Display is working on Siemens mainboards (e.g. mc_tcu3, mc_apl1, ...).

Change-Id: I976a502e7176a356bab772758250db3cdff529b9
Signed-off-by: Uwe Poeche <uwe.poeche@siemens.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36643
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

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;
+}