276 lines
6.1 KiB
C
276 lines
6.1 KiB
C
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/*
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* panel-n-wqxga-6-0.c: Panel driver for n-wqxga-6-0 panel.
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*
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* Copyright (c) 2015-2018, NVIDIA CORPORATION. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*/
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#include <linux/gpio.h>
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#include <linux/regulator/consumer.h>
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#include <linux/pwm_backlight.h>
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#include <linux/i2c.h>
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#include <linux/device.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include "../dc.h"
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#include "../dc_priv.h"
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#include "board-panel.h"
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#define DSI_PANEL_RESET 1
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static struct regulator *dvdd_lcd_1v8;
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static struct regulator *avdd_lcd_1v2;
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static bool reg_requested;
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static u16 en_panel_rst;
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static u16 en_panel;
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static struct device *dc_dev;
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static struct i2c_client *dsc_i2c_client;
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static u8 i2c_bus_num = 0;
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static u8 i2c_bus_num_nvdisplay = 1;
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enum i2c_transfer_type {
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I2C_WRITE,
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I2C_READ,
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};
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static u8 dsc_panel_volt_en[][3] = {
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{0x9E, 0x02},
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{0xA1, 0xBF},
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{0xA9, 0x80},
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};
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static int dsi_i2c_panel_volt_en(struct i2c_client *client)
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{
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struct i2c_msg *i2c_msg_transfer;
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u8 num_of_xfers = ARRAY_SIZE(dsc_panel_volt_en);
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u32 cnt;
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int err;
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i2c_msg_transfer = kcalloc(num_of_xfers, sizeof(struct i2c_msg),
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GFP_KERNEL);
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if (!i2c_msg_transfer)
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return -ENOMEM;
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for (cnt = 0; cnt < num_of_xfers; cnt++) {
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i2c_msg_transfer[cnt].addr = client->addr;
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i2c_msg_transfer[cnt].flags = I2C_WRITE;
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i2c_msg_transfer[cnt].len = 2;
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i2c_msg_transfer[cnt].buf = dsc_panel_volt_en[cnt];
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}
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for (cnt = 0; cnt < num_of_xfers; cnt++) {
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err = i2c_transfer(client->adapter, &i2c_msg_transfer[cnt], 1);
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if (err < 0)
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break;
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msleep(10);
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}
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kfree(i2c_msg_transfer);
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return err;
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}
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static struct i2c_driver tegra_e2256_dsc_adaptor_i2c_slave_driver = {
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.driver = {
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.name = "e2256-dsc-adaptor",
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},
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};
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static struct i2c_client *init_e2256_i2c_slave(struct device *dev)
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{
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struct i2c_adapter *adapter;
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struct i2c_client *client;
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struct i2c_board_info p_data = {
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.type = "e2256-dsc-adaptor",
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.addr = 0x2C,
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};
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int bus = 0;
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int err = 0;
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if (tegra_dc_is_nvdisplay())
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bus = i2c_bus_num_nvdisplay;
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else
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bus = i2c_bus_num;
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adapter = i2c_get_adapter(bus);
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if (!adapter) {
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dev_err(dev, "e2256-dsc-panel: can't get adpater for bus %d\n", bus);
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err = -EBUSY;
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goto err;
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}
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client = i2c_new_device(adapter, &p_data);
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i2c_put_adapter(adapter);
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if (!client) {
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dev_err(dev, "e2256-dsc-panel: can't add i2c slave device\n");
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err = -EBUSY;
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goto err;
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}
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err = i2c_add_driver(&tegra_e2256_dsc_adaptor_i2c_slave_driver);
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if (err) {
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dev_err(dev, "e2256-dsc-panel: can't add i2c slave driver\n");
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goto err_free;
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}
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return client;
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err:
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return ERR_PTR(err);
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err_free:
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i2c_unregister_device(client);
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return ERR_PTR(err);
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}
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static int dsi_n_wqxga_6_0_regulator_get(struct device *dev)
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{
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int err;
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if (reg_requested)
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return 0;
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dvdd_lcd_1v8 = regulator_get(dev, "dvdd_lcd");
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if (IS_ERR_OR_NULL(dvdd_lcd_1v8)) {
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pr_err("dvdd_lcd regulator not found\n");
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err = PTR_ERR(dvdd_lcd_1v8);
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dvdd_lcd_1v8 = NULL;
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goto fail;
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}
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avdd_lcd_1v2 = regulator_get(dev, "avdd_lcd");
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if (IS_ERR_OR_NULL(avdd_lcd_1v2)) {
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pr_err("avdd_lcd_1v2 regulator not found\n");
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err = PTR_ERR(avdd_lcd_1v2);
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avdd_lcd_1v2 = NULL;
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goto fail;
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}
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reg_requested = true;
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return 0;
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fail:
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return err;
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}
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static int dsi_n_wqxga_6_0_enable(struct device *dev)
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{
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unsigned flags = tegra_dc_out_flags_from_dev(dev);
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int err;
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err = dsi_n_wqxga_6_0_regulator_get(dev);
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if (err) {
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pr_err("Display panel regulator get failed\n");
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goto fail;
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}
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err = tegra_panel_gpio_get_dt("n,wqxga-6-0", &panel_of);
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if (err < 0) {
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pr_err("display panel gpio get failed\n");
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goto fail;
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}
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if (gpio_is_valid(panel_of.panel_gpio[TEGRA_GPIO_RESET])) {
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en_panel_rst = panel_of.panel_gpio[TEGRA_GPIO_RESET];
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} else {
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pr_err("Display panel reset gpio invalid\n");
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goto fail;
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}
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if (gpio_is_valid(panel_of.panel_gpio[TEGRA_GPIO_PANEL_EN])) {
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en_panel = panel_of.panel_gpio[TEGRA_GPIO_PANEL_EN];
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} else {
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pr_err("Display panel enable gpio invalid\n");
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goto fail;
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}
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/* Enable regulators */
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if (avdd_lcd_1v2) {
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err = regulator_enable(avdd_lcd_1v2);
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if (err) {
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pr_err("Failed to enable avdd_lcd regulator\n");
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goto fail;
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}
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}
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if (dvdd_lcd_1v8) {
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err = regulator_enable(dvdd_lcd_1v8);
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if (err) {
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pr_err("Failed to enable dvdd_lcd regulator\n");
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goto fail;
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}
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}
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/* I2C programming to enable e2256 display adaptor */
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dsc_i2c_client = init_e2256_i2c_slave(dev);
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if (IS_ERR_OR_NULL(dsc_i2c_client)) {
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pr_err("Failed to get e2256 adaptor i2c client\n");
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dsc_i2c_client = NULL;
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err = -EINVAL;
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goto fail;
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}
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err = dsi_i2c_panel_volt_en(dsc_i2c_client);
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if (err < 0) {
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pr_err("DSC panel volt en i2c xfer failed %d\n", err);
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goto fail;
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}
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/* Enable panel */
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gpio_direction_output(en_panel, 1);
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/* Reset the panel */
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#if DSI_PANEL_RESET
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if (!(flags & TEGRA_DC_OUT_INITIALIZED_MODE)) {
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/* De-assert the LCD reset */
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gpio_set_value(en_panel_rst, 1);
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mdelay(100);
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/* Assert the LCD reset */
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gpio_set_value(en_panel_rst, 0);
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mdelay(100);
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/* De-assert the LCD reset */
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gpio_set_value(en_panel_rst, 1);
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mdelay(1000);
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}
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#endif
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dc_dev = dev;
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return 0;
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fail:
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return err;
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}
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static int dsi_n_wqxga_6_0_disable(struct device *dev)
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{
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if (gpio_is_valid(en_panel))
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gpio_set_value(en_panel, 0);
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if (gpio_is_valid(en_panel_rst))
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gpio_set_value(en_panel_rst, 0);
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if (dvdd_lcd_1v8)
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regulator_disable(dvdd_lcd_1v8);
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if (avdd_lcd_1v2)
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regulator_disable(avdd_lcd_1v2);
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if (dsc_i2c_client) {
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i2c_del_driver(&tegra_e2256_dsc_adaptor_i2c_slave_driver);
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i2c_unregister_device(dsc_i2c_client);
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}
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return 0;
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}
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static int dsi_n_wqxga_6_0_postsuspend(void)
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{
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return 0;
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}
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struct tegra_panel_ops dsi_n_wqxga_6_0_ops = {
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.enable = dsi_n_wqxga_6_0_enable,
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.disable = dsi_n_wqxga_6_0_disable,
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.postsuspend = dsi_n_wqxga_6_0_postsuspend,
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};
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