Patrick Georgi (pgeorgi@google.com) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/13981
-gerrit
commit e78fbb5cda71c338ccc8212035d094d588c8b73d Author: Jitao Shi jitao.shi@mediatek.com Date: Fri Jan 8 15:59:46 2016 +0800
Add a driver for the parade ps8640
BRANCH=none BUG=none TEST=none
Change-Id: Icf397ce2ffdaed5048367daf2086c067984fea0a Signed-off-by: Patrick Georgi pgeorgi@chromium.org Original-Commit-Id: b5a88793ccfc46af196300791a300be67b70f5b1 Original-Change-Id: I75adf2688c9c8b9a2338f7dee5d0ac10e7181529 Original-Signed-off-by: Jitao Shi jitao.shi@mediatek.com Original-Reviewed-on: https://chromium-review.googlesource.com/321056 Original-Commit-Ready: Yidi Lin yidi.lin@mediatek.com Original-Tested-by: Yidi Lin yidi.lin@mediatek.com Original-Reviewed-by: Julius Werner jwerner@chromium.org --- src/drivers/parade/Kconfig | 1 + src/drivers/parade/Makefile.inc | 1 + src/drivers/parade/ps8640/Kconfig | 20 +++++++++ src/drivers/parade/ps8640/Makefile.inc | 16 +++++++ src/drivers/parade/ps8640/ps8640.c | 79 ++++++++++++++++++++++++++++++++++ src/drivers/parade/ps8640/ps8640.h | 45 +++++++++++++++++++ 6 files changed, 162 insertions(+)
diff --git a/src/drivers/parade/Kconfig b/src/drivers/parade/Kconfig index be80bb8..7fe74df 100644 --- a/src/drivers/parade/Kconfig +++ b/src/drivers/parade/Kconfig @@ -14,3 +14,4 @@ ##
source src/drivers/parade/ps8625/Kconfig +source src/drivers/parade/ps8640/Kconfig diff --git a/src/drivers/parade/Makefile.inc b/src/drivers/parade/Makefile.inc index 0470763..06367c1 100644 --- a/src/drivers/parade/Makefile.inc +++ b/src/drivers/parade/Makefile.inc @@ -14,3 +14,4 @@ ##
subdirs-$(CONFIG_DRIVER_PARADE_PS8625) += ps8625/ +subdirs-$(CONFIG_DRIVER_PARADE_PS8640) += ps8640/ diff --git a/src/drivers/parade/ps8640/Kconfig b/src/drivers/parade/ps8640/Kconfig new file mode 100644 index 0000000..f0d71bb --- /dev/null +++ b/src/drivers/parade/ps8640/Kconfig @@ -0,0 +1,20 @@ +## +## This file is part of the coreboot project. +## +## Copyright 2015 MediaTek Inc. +## +## 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. +## + +config DRIVER_PARADE_PS8640 + bool + default n + help + Parade PS8640 MIPI DSI to eDP Converter diff --git a/src/drivers/parade/ps8640/Makefile.inc b/src/drivers/parade/ps8640/Makefile.inc new file mode 100644 index 0000000..9bfe1e7 --- /dev/null +++ b/src/drivers/parade/ps8640/Makefile.inc @@ -0,0 +1,16 @@ +## +## This file is part of the coreboot project. +## +## Copyright 2015 MediaTek Inc. +## +## 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. +## + +ramstage-$(CONFIG_DRIVER_PARADE_PS8640) += ps8640.c diff --git a/src/drivers/parade/ps8640/ps8640.c b/src/drivers/parade/ps8640/ps8640.c new file mode 100644 index 0000000..08de2ee --- /dev/null +++ b/src/drivers/parade/ps8640/ps8640.c @@ -0,0 +1,79 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2015 MediaTek Inc. + * + * 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 <delay.h> +#include <device/i2c.h> +#include <edid.h> +#include <console/console.h> +#include <timer.h> + +#include "ps8640.h" + +int ps8640_get_edid(uint8_t bus, uint8_t chip, struct edid *out) +{ + int ret; + u8 edid[EDID_LENGTH * 2]; + u32 edid_size; + + i2c_writeb(bus, chip + 2, PAGE2_I2C_BYPASS, + EDID_I2C_ADDR | I2C_BYPASS_EN); + ret = i2c_read_bytes(bus, EDID_I2C_ADDR, 0, edid, EDID_LENGTH); + + if (ret != 0) { + printk(BIOS_INFO, "Failed to read EDID.\n"); + return -1; + } + + /* check if edid have extension flag, and read additional EDID data */ + if (edid[EDID_EXTENSION_FLAG]) { + edid_size += EDID_LENGTH; + ret = i2c_read_bytes(bus, EDID_I2C_ADDR, EDID_LENGTH, + &edid[EDID_LENGTH], EDID_LENGTH); + if (ret != 0) { + printk(BIOS_INFO, "Failed to read EDID ext block.\n"); + return -1; + } + } + + if (decode_edid(edid, edid_size, out)) { + printk(BIOS_INFO, "Failed to decode EDID.\n"); + return -1; + } + + return 0; +} + +int ps8640_init(uint8_t bus, uint8_t chip) +{ + u8 set_vdo_done; + struct stopwatch sw; + + stopwatch_init_msecs_expire(&sw, 350); + + do { + i2c_readb(bus, chip + 2, PAGE2_GPIO_H, &set_vdo_done); + if (stopwatch_expired(&sw)) { + printk(BIOS_INFO, "Failed to init ps8640.\n"); + return -1; + } + } while ((set_vdo_done & PS_GPIO9) != PS_GPIO9); + + i2c_writeb(bus, chip + 3, PAGE3_SET_ADD, VDO_CTL_ADD); + i2c_writeb(bus, chip + 3, PAGE3_SET_VAL, VDO_DIS); + i2c_writeb(bus, chip + 3, PAGE3_SET_ADD, VDO_CTL_ADD); + i2c_writeb(bus, chip + 3, PAGE3_SET_VAL, VDO_EN); + + return 0; +} diff --git a/src/drivers/parade/ps8640/ps8640.h b/src/drivers/parade/ps8640/ps8640.h new file mode 100644 index 0000000..9e483b6 --- /dev/null +++ b/src/drivers/parade/ps8640/ps8640.h @@ -0,0 +1,45 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2015 MediaTek Inc. + * + * 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 <edid.h> +#include <types.h> + +#ifndef _PS8640_H_ +#define _PS8640_H_ + +enum { + PAGE2_GPIO_L = 0xa6, + PAGE2_GPIO_H = 0xa7, + PAGE2_I2C_BYPASS = 0xea, + PS_GPIO9 = BIT(1), + I2C_BYPASS_EN = BIT(7), + + PAGE3_SET_ADD = 0xfe, + PAGE3_SET_VAL = 0xff, + VDO_CTL_ADD = 0x13, + VDO_DIS = 0x18, + VDO_EN = 0x1c, +}; + +enum { + EDID_LENGTH = 128, + EDID_I2C_ADDR = 0x50, + EDID_EXTENSION_FLAG = 0x7e, +}; + +int ps8640_init(uint8_t bus, uint8_t chip); +int ps8640_get_edid(uint8_t bus, uint8_t chip, struct edid *out); +#endif +