[全志T113]：ST7701 86屏幕驱动

[全志T113]：ST7701 86屏幕驱动

添加屏幕驱动流程

1.添加驱动源码

如果要添加lcd驱动，添加位置如下：

/home/ubuntu/Tina-Linux/lichee/linux-5.4/drivers/video/fbdev/sunxi/disp2

2.配置kconfig和Makefile

同时配置目录下的Kconfig与Makefile，文件路径分别如下：

/home/ubuntu/Tina-Linux/lichee/linux-5.4/drivers/video/fbdev/sunxi/disp2/disp/lcd/Kconfig
/home/ubuntu/Tina-Linux/lichee/linux-5.4/drivers/video/fbdev/sunxi/disp2/disp/Makefile

2.1 kconfig

config LCD_SUPPORT_ST7701_86
        bool "LCD support ST7701_86 panel"
        default y
        ---help---
                If you want to support ST7701_86 panel for display driver, select it.

2.2 Makefile

disp-$(CONFIG_LCD_SUPPORT_ST7701_86) += lcd/st7701_86.o

2.3 built-in.a

这个文件需要添加我们刚才编译完的.o文件

lcd/st7701_86.o/

3.修改panels.c和panels.h

/home/ubuntu/Tina-Linux/lichee/linux-5.4/drivers/video/fbdev/sunxi/disp2/disp/lcd/panels.c
/home/ubuntu/Tina-Linux/lichee/linux-5.4/drivers/video/fbdev/sunxi/disp2/disp/lcd/panels.h

#ifdef CONFIG_LCD_SUPPORT_ST7701_86
extern struct __lcd_panel st7701_86_panel;
#endif

4.修改dts

&lcd0 {
/* part 1 */
	lcd_used            = <1>;
	lcd_driver_name     = "st7701_86";
	lcd_backlight	    = <255>;

	/* part 2 */
	lcd_if = <0>;
	lcd_hv_if = <0>;
	
	/* part 3 */
	lcd_x               = <480>;
	lcd_y               = <480>;
	lcd_width           = <71>;
	lcd_height          = <71>;
	lcd_dclk_freq       = <16>;

	lcd_hbp             = <20>;
	lcd_ht              = <526>;
	lcd_hspw            = <6>;

	lcd_vbp             = <10>;
	lcd_vt              = <510>;
	lcd_vspw            = <4>;
		
	lcd_pwm_used        = <1>;
	lcd_pwm_ch          = <7>;
	lcd_pwm_freq        = <5000>;
	lcd_pwm_pol         = <0>;

	/* part 5 */
	lcd_frm = <1>;
	lcd_io_phase = <0x0000>;
	lcd_gamma_en = <0>;
	lcd_cmap_en = <0>;
	lcd_hv_clk_phase = <0>;
	lcd_hv_sync_polarity= <0>;

	// reset
	lcd_gpio_0 = <&pio PB 4 GPIO_ACTIVE_HIGH>;
	// cs
	lcd_gpio_1 = <&pio PB 7 GPIO_ACTIVE_HIGH>;
	// sda
	lcd_gpio_2 = <&pio PB 5 GPIO_ACTIVE_HIGH>;
	// sck
	lcd_gpio_3 = <&pio PB 6 GPIO_ACTIVE_HIGH>;

	//bl
	lcd_bl_en = <&pio PD 22 GPIO_ACTIVE_HIGH>;

	/* part 6 */
	lcd_power = "vcc-lcd";
	lcd_pin_power = "vcc-pd";
	pinctrl-0 = <&rgb18_pins_a>;
	pinctrl-1 = <&rgb18_pins_b>;
};

&disp {
	disp_init_enable         = <1>;
	disp_mode                = <0>;

	screen0_output_type      = <1>;
	screen0_output_mode      = <4>;

	screen1_output_type      = <3>;
	screen1_output_mode      = <10>;

	screen1_output_format    = <0>;
	screen1_output_bits      = <0>;
	screen1_output_eotf      = <4>;
	screen1_output_cs        = <257>;
	screen1_output_dvi_hdmi  = <2>;
	screen1_output_range     = <2>;
	screen1_output_scan      = <0>;
	screen1_output_aspect_ratio = <8>;

	dev0_output_type         = <1>;
	dev0_output_mode         = <4>;
	dev0_screen_id           = <0>;
	dev0_do_hpd              = <0>;

	dev1_output_type         = <4>;
	dev1_output_mode         = <10>;
	dev1_screen_id           = <1>;
	dev1_do_hpd              = <1>;

	def_output_dev           = <0>;
	hdmi_mode_check          = <1>;

	fb0_format               = <0>;
	fb0_width                = <0>;
	fb0_height               = <0>;

	fb1_format               = <0>;
	fb1_width                = <0>;
	fb1_height               = <0>;
	chn_cfg_mode             = <1>;

	disp_para_zone           = <1>;
	/*VCC-LCD*/
/*	dc1sw-supply = <&reg_pio3_3>;*/
	/*VCC-DSI*/
/*	eldo3-supply = <&reg_eldo3>;*/
	/*VCC-PD*/
/*	dcdc1-supply = <&reg_pio3_3>;*/
};

5.测试

root@TinaLinux:/# cat /dev/urandom > /dev/fb0
root@TinaLinux:/# echo 8 > /sys/class/disp/disp/attr/colorbar

6.驱动文件

驱动文件参考繁花cloud提供的sdk

st7701_86.c

/*
 * drivers/video/fbdev/sunxi/disp2/disp/lcd/st7701_86/st7701_86.c
 *
 * Copyright (c) 2007-2018 Allwinnertech Co., Ltd.
 * Author: zhengxiaobin <zhengxiaobin@allwinnertech.com>
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * 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.
 *
[lcd0]
lcd_used            = 1
lcd_driver_name     = "st7701_86"
lcd_x               = 480
lcd_y               = 480
lcd_width           = 71
lcd_height          = 71
lcd_dclk_freq       = 30
lcd_pwm_used        = 1
lcd_pwm_ch          = 8
lcd_pwm_freq        = 50000
lcd_pwm_pol         = 0
lcd_pwm_max_limit   = 255
lcd_hbp             = 120
;10 + 20 + 10 + 240*3 = 760  real set 1000
lcd_ht              = 850
lcd_hspw            = 2
lcd_vbp             = 13
lcd_vt              = 373
lcd_vspw            = 2
lcd_frm             = 1
lcd_if              = 0
lcd_hv_if			= 8
lcd_hv_clk_phase    = 0
lcd_hv_sync_polarity   = 0
lcd_hv_srgb_seq		= 0
lcd_io_phase        = 0x0000
lcd_gamma_en        = 0
lcd_bright_curve_en = 1
lcd_cmap_en         = 0
lcd_rb_swap	= 0
deu_mode            = 0
lcdgamma4iep        = 22
smart_color         = 90
;lcd_bl_en           = port:PB03<1><0><default><1>
lcd_power           = "vcc-lcd"
lcd_pin_power           = "vcc-pd"
;reset
lcd_gpio_0          = port:PD09<1><0><default><1>
;cs
lcd_gpio_1          = port:PD10<1><0><default><0>
;sda
lcd_gpio_2          = port:PD13<1><0><default><0>
;sck
lcd_gpio_3          = port:PD12<1><0><default><0>
lcdd5                = port:PD03<2><0><2><default>
lcdd6                = port:PD04<2><0><2><default>
lcdd7                = port:PD05<2><0><2><default>
lcdd10               = port:PD06<2><0><2><default>
lcdd11               = port:PD07<2><0><2><default>
lcdd12               = port:PD08<2><0><2><default>
lcdclk              = port:PD18<2><0><3><default>
lcdde               = port:PD19<2><0><3><default>
lcdhsync            = port:PD20<2><0><3><default>
lcdvsync            = port:PD21<2><0><3><default>
[lcd0_suspend]
lcdd5                = port:PD03<7><0><2><default>
lcdd6                = port:PD04<7><0><2><default>
lcdd7                = port:PD05<7><0><2><default>
lcdd10               = port:PD06<7><0><2><default>
lcdd11               = port:PD07<7><0><2><default>
lcdd12               = port:PD08<7><0><2><default>
lcdclk              = port:PD18<7><0><3><default>
lcdde               = port:PD19<7><0><3><default>
lcdhsync            = port:PD20<7><0><3><default>
lcdvsync            = port:PD21<7><0><3><default>
 */
#include "st7701_86.h"

#define spi_scl_1 sunxi_lcd_gpio_set_value(0, 3, 1)
#define spi_scl_0 sunxi_lcd_gpio_set_value(0, 3, 0)
#define spi_sdi_1 sunxi_lcd_gpio_set_value(0, 2, 1)
#define spi_sdi_0 sunxi_lcd_gpio_set_value(0, 2, 0)
#define spi_cs_1 sunxi_lcd_gpio_set_value(0, 1, 1)
#define spi_cs_0 sunxi_lcd_gpio_set_value(0, 1, 0)

static void lcd_panel_st7701_86_init(void);
static void LCD_power_on(u32 sel);
static void LCD_power_off(u32 sel);
static void LCD_bl_open(u32 sel);
static void LCD_bl_close(u32 sel);

static void LCD_panel_init(u32 sel);
static void LCD_panel_exit(u32 sel);

static void LCD_cfg_panel_info(struct panel_extend_para *info)
{
   
   
	u32 i = 0, j = 0;
	u32 items;
	u8 lcd_gamma_tbl[][2] = {
   
   
	    /* {input value, corrected value} */
	    {
   
   0, 0},     {
   
   15, 15},   {
   
   30, 30},   {
   
   45, 45},   {
   
   60, 60},
	    {
   
   75, 75},   {
   
   90, 90},   {
   
   105, 105}, {
   
   120, 120}, {
   
   135, 135},
	    {
   
   150, 150}, {
   
   165, 165}, {
   
   180, 180}, {
   
   195, 195}, {
   
   210, 210},
	    {
   
   225, 225}, {
   
   240, 240}, {
   
   255, 255},
	};

	u32 lcd_cmap_tbl[2][3][4] = {
   
   
	    {
   
   
		{
   
   LCD_CMAP_G0, LCD_CMAP_B1, LCD_CMAP_G2, LCD_CMAP_B3},
		{
   
   LCD_CMAP_B0, LCD_CMAP_R1, LCD_CMAP_B2, LCD_CMAP_R3},
		{
   
   LCD_CMAP_R0, LCD_CMAP_G1, LCD_CMAP_R2, LCD_CMAP_G3},
	    },
	    {
   
   
		{