311 lines
7.0 KiB
C
311 lines
7.0 KiB
C
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/*
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* panel-s-wuxga-8-0.c: Panel driver for s-wuxga-8-0 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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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/delay.h>
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#include <linux/gpio.h>
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#include <linux/regulator/consumer.h>
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#include "../dc.h"
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#include "../dc_priv.h"
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#include "board.h"
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#include "board-panel.h"
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#define DSI_PANEL_RESET 1
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static bool reg_requested;
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static struct regulator *avdd_lcd_3v0;
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static struct regulator *dvdd_lcd_1v8;
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static struct regulator *vpp_lcd;
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static struct regulator *vmm_lcd;
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static struct device *dc_dev;
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static u16 en_panel_rst;
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static u16 en_backlight;
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static u16 en_panel;
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static bool vmm_vpp_fixed_regulators;
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static int dsi_s_wuxga_8_0_regulator_get(struct device *dev)
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{
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int err = 0;
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if (reg_requested)
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return 0;
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avdd_lcd_3v0 = regulator_get(dev, "avdd_lcd");
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if (IS_ERR_OR_NULL(avdd_lcd_3v0)) {
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pr_err("avdd_lcd regulator get failed\n");
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err = PTR_ERR(avdd_lcd_3v0);
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avdd_lcd_3v0 = NULL;
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goto fail;
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}
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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_1v8 regulator get failed\n");
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err = PTR_ERR(dvdd_lcd_1v8);
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dvdd_lcd_1v8 = NULL;
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goto dvdd_lcd_fail;
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}
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vpp_lcd = regulator_get(dev, "outp");
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if (IS_ERR_OR_NULL(vpp_lcd)) {
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pr_err("vpp_lcd regulator get failed\n");
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err = PTR_ERR(vpp_lcd);
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vpp_lcd = NULL;
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goto vpp_lcd_fail;
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}
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vmm_lcd = regulator_get(dev, "outn");
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if (IS_ERR_OR_NULL(vmm_lcd)) {
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pr_err("vmm_lcd regulator get failed\n");
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err = PTR_ERR(vmm_lcd);
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vmm_lcd = NULL;
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goto vmm_lcd_fail;
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}
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reg_requested = true;
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return 0;
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vmm_lcd_fail:
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if (vpp_lcd) {
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regulator_put(vpp_lcd);
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vpp_lcd = NULL;
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}
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vpp_lcd_fail:
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if (dvdd_lcd_1v8) {
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regulator_put(dvdd_lcd_1v8);
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dvdd_lcd_1v8 = NULL;
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}
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dvdd_lcd_fail:
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if (avdd_lcd_3v0) {
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regulator_put(avdd_lcd_3v0);
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avdd_lcd_3v0 = NULL;
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}
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fail:
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return err;
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}
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static int dsi_s_wuxga_8_0_enable(struct device *dev)
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{
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int err = 0;
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err = tegra_panel_check_regulator_dt_support("s,wuxga-8-0",
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&panel_of);
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if (err < 0) {
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pr_err("display regulator dt check failed\n");
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goto fail;
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} else {
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vmm_vpp_fixed_regulators = panel_of.en_vmm_vpp_i2c_config;
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}
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err = dsi_s_wuxga_8_0_regulator_get(dev);
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if (err < 0) {
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pr_err("dsi regulator get failed\n");
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goto fail;
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}
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err = tegra_panel_gpio_get_dt("s,wuxga-8-0", &panel_of);
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if (err < 0) {
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pr_err("display 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 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_BL_ENABLE]))
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en_backlight = panel_of.panel_gpio[TEGRA_GPIO_BL_ENABLE];
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else
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pr_err("display backlight enable gpio invalid\n");
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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 backlight enable gpio invalid\n");
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if (dvdd_lcd_1v8) {
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err = regulator_enable(dvdd_lcd_1v8);
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if (err < 0) {
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pr_err("dvdd_lcd regulator enable failed\n");
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goto fail;
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}
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}
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usleep_range(1000, 1500);
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if (avdd_lcd_3v0) {
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err = regulator_enable(avdd_lcd_3v0);
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if (err < 0) {
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pr_err("avdd_lcd regulator enable failed\n");
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goto fail;
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}
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}
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usleep_range(3000, 3500);
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if (gpio_is_valid(en_backlight))
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gpio_direction_output(en_backlight, 1);
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if (en_panel)
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gpio_direction_output(en_panel, 1);
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if (vpp_lcd) {
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err = regulator_enable(vpp_lcd);
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if (err < 0) {
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pr_err("vpp_lcd regulator enable failed\n");
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goto fail;
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}
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if (!vmm_vpp_fixed_regulators) {
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err = regulator_set_voltage(vpp_lcd, 5500000, 5500000);
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if (err < 0) {
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pr_err("vpp_lcd regulator failed changing voltage\n");
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goto fail;
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}
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}
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}
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usleep_range(2000, 2500);
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if (vmm_lcd) {
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err = regulator_enable(vmm_lcd);
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if (err < 0) {
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pr_err("vmm_lcd regulator enable failed\n");
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goto fail;
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}
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if (!vmm_vpp_fixed_regulators) {
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err = regulator_set_voltage(vmm_lcd, 5500000, 5500000);
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if (err < 0) {
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pr_err("vmm_lcd regulator failed changing voltage\n");
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goto fail;
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}
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}
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}
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usleep_range(15000, 15500);
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#if DSI_PANEL_RESET
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if (!tegra_dc_initialized(dev)) {
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err = gpio_direction_output(en_panel_rst, 1);
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if (err < 0) {
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pr_err("setting display reset gpio value failed\n");
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goto fail;
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}
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err = gpio_direction_output(en_panel_rst, 0);
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if (err < 0) {
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pr_err("setting display reset gpio value 0 failed\n");
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goto fail;
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}
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err = gpio_direction_output(en_panel_rst, 1);
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if (err < 0) {
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pr_err("setting display reset gpio value 1 failed\n");
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goto fail;
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}
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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_s_wuxga_8_0_disable(struct device *dev)
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{
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if (gpio_is_valid(en_panel_rst)) {
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/* Wait for 50ms before triggering panel reset */
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msleep(50);
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gpio_set_value(en_panel_rst, 0);
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usleep_range(500, 1000);
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} else
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pr_err("ERROR! display reset gpio invalid\n");
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if (vmm_lcd)
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regulator_disable(vmm_lcd);
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usleep_range(2000, 2500);
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if (vpp_lcd)
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regulator_disable(vpp_lcd);
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msleep(125);
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if (en_panel)
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gpio_direction_output(en_panel, 0);
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if (avdd_lcd_3v0)
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regulator_disable(avdd_lcd_3v0);
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msleep(780);
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if (dvdd_lcd_1v8)
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regulator_disable(dvdd_lcd_1v8);
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/* Min delay of 140ms required to avoid turning
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* the panel on too soon after power off */
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msleep(140);
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dc_dev = NULL;
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return 0;
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}
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static int dsi_s_wuxga_8_0_postsuspend(void)
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{
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return 0;
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}
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static int dsi_s_wuxga_8_0_bl_notify(struct device *dev, int brightness)
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{
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struct backlight_device *bl = NULL;
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struct pwm_bl_data *pb = NULL;
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bl = (struct backlight_device *)dev_get_drvdata(dev);
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pb = (struct pwm_bl_data *)dev_get_drvdata(&bl->dev);
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/* Apply any backlight response curve */
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if (brightness > 255)
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pr_info("Error: Brightness > 255!\n");
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else if (pb->bl_measured)
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brightness = pb->bl_measured[brightness];
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return brightness;
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}
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static int dsi_s_wuxga_8_0_check_fb(struct device *dev,
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struct fb_info *info)
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{
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struct platform_device *pdev = NULL;
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pdev = to_platform_device(bus_find_device_by_name(
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&platform_bus_type, NULL, "tegradc.0"));
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return info->device == &pdev->dev;
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}
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static struct pwm_bl_data_dt_ops dsi_s_wuxga_8_0_pwm_bl_ops = {
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.notify = dsi_s_wuxga_8_0_bl_notify,
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.check_fb = dsi_s_wuxga_8_0_check_fb,
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.blnode_compatible = "s,wuxga-8-0-bl",
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};
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struct tegra_panel_ops dsi_s_wuxga_8_0_ops = {
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.enable = dsi_s_wuxga_8_0_enable,
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.disable = dsi_s_wuxga_8_0_disable,
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.postsuspend = dsi_s_wuxga_8_0_postsuspend,
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.pwm_bl_ops = &dsi_s_wuxga_8_0_pwm_bl_ops,
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};
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