7760a47892
On one particular TV the TV was holding SDA low when it came up. It would release the SDA when the SCL went low the first time. Unfortunately the HDMI i2c port wouldn't transmit until the SDA was released. Let's detect this case and insert a bogus clock pulse to try to get the other side to release SDA. It's unclear why the kernel doesn't have this problem. BRANCH=none BUG=chrome-os-partner:46256 TEST=Insignia TV works now Change-Id: Ic9d27eb69bdc9c5fb11a68258e0c755cdc8b79d7 Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Original-Commit-Id: 356ee7503f04e741a41be37ad573b588067b7114 Original-Change-Id: I4b6361877e0576cc4ea2f643f073f1aab660e434 Original-Signed-off-by: Douglas Anderson <dianders@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/309258 Original-Reviewed-by: Agnes Cheng <agnescheng@google.com> Original-Commit-Queue: Agnes Cheng <agnescheng@google.com> Original-Trybot-Ready: Agnes Cheng <agnescheng@google.com> Original-Tested-by: Agnes Cheng <agnescheng@google.com> Original-Reviewed-on: https://chromium-review.googlesource.com/309546 Original-Commit-Ready: David Hendricks <dhendrix@chromium.org> Original-Tested-by: David Hendricks <dhendrix@chromium.org> Original-Reviewed-by: David Hendricks <dhendrix@chromium.org> Reviewed-on: http://review.coreboot.org/12451 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth <martinroth@google.com>
119 lines
2.7 KiB
C
119 lines
2.7 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright 2014 Rockchip Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <arch/cache.h>
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#include <arch/io.h>
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#include <boot/coreboot_tables.h>
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#include <console/console.h>
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#include <delay.h>
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#include <device/device.h>
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#include <device/i2c.h>
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#include <edid.h>
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#include <elog.h>
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#include <gpio.h>
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#include <soc/display.h>
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#include <soc/grf.h>
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#include <soc/soc.h>
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#include <soc/pmu.h>
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#include <soc/clock.h>
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#include <soc/rk808.h>
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#include <soc/spi.h>
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#include <soc/i2c.h>
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#include <symbols.h>
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#include <vbe.h>
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#include <vendorcode/google/chromeos/chromeos.h>
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#include "board.h"
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static void configure_usb(void)
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{
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gpio_output(GPIO(0, B, 4), 1); /* USB2_PWR_EN */
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}
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static void configure_emmc(void)
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{
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write32(&rk3288_grf->iomux_emmcdata, IOMUX_EMMCDATA);
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write32(&rk3288_grf->iomux_emmcpwren, IOMUX_EMMCPWREN);
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write32(&rk3288_grf->iomux_emmccmd, IOMUX_EMMCCMD);
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gpio_output(GPIO(2, B, 1), 1); /* EMMC_RST_L */
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}
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static void configure_i2s(void)
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{
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write32(&rk3288_grf->iomux_i2s, IOMUX_I2S);
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write32(&rk3288_grf->iomux_i2sclk, IOMUX_I2SCLK);
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/* AUDIO IO domain 1.8V voltage selection */
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write32(&rk3288_grf->io_vsel, RK_SETBITS(1 << 6));
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rkclk_configure_i2s(12288000);
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}
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static void configure_vop(void)
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{
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write32(&rk3288_grf->iomux_lcdc, IOMUX_LCDC);
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/* lcdc(vop) iodomain select 1.8V */
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write32(&rk3288_grf->io_vsel, RK_SETBITS(1 << 0));
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rk808_configure_ldo(8, 1800); /* VCC18_LCD (HDMI_AVDD_1V8) */
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rk808_configure_ldo(7, 1000); /* VDD10_LCD (HDMI_AVDD_1V0) */
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rk808_configure_switch(1, 1); /* VCC33_LCD */
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}
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static void configure_hdmi(void)
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{
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gpio_output(GPIO(7, B, 3), 1); /* POWER_HDMI_ON */
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}
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static void mainboard_init(device_t dev)
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{
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gpio_output(GPIO_RESET, 0);
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configure_usb();
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configure_emmc();
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configure_i2s();
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configure_vop();
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configure_hdmi();
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elog_init();
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elog_add_watchdog_reset();
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elog_add_boot_reason();
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}
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static void mainboard_enable(device_t dev)
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{
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dev->ops->init = &mainboard_init;
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}
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struct chip_operations mainboard_ops = {
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.enable_dev = mainboard_enable,
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};
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void lb_board(struct lb_header *header)
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{
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struct lb_range *dma;
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dma = (struct lb_range *)lb_new_record(header);
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dma->tag = LB_TAB_DMA;
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dma->size = sizeof(*dma);
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dma->range_start = (uintptr_t)_dma_coherent;
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dma->range_size = _dma_coherent_size;
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}
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void mainboard_power_on_backlight(void)
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{
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return;
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}
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