T113 tina linux 适配 ili9488 屏幕 i80 16bit

hsinyuwang LV 6

前言

在上一篇文章已经搞定了 T113 tina linux 移植 gpsp 模拟器接下来适配屏幕驱动。
因为 GBA 原生分辨率是 240x160，所以屏幕选用的是 480x320 的 ili9488，正好可以整数倍缩放。

初始化屏幕

先从 tina linux 自带的驱动中 copy 一份 st7789v_cpu 的代码，然后对照 ili9488 屏幕厂商提供的初始化代码做修改

完整代码

/*
 * drivers/video/fbdev/sunxi/disp2/disp/lcd/ili9488_cpu.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.
 *
 *
 */

#include "ili9488_cpu.h"

#define CPU_TRI_MODE

#define DBG_INFO(format, args...) (printk("[ILI9488 LCD INFO] LINE:%04d-->%s:"format, __LINE__, __func__, ##args))
#define DBG_ERR(format, args...) (printk("[ILI9488 LCD ERR] LINE:%04d-->%s:"format, __LINE__, __func__, ##args))
#define panel_reset(val) sunxi_lcd_gpio_set_value(sel, 0, val)
#define lcd_cs(val)  sunxi_lcd_gpio_set_value(sel, 1, val)

static void lcd_panel_ili9488_init(u32 sel, struct disp_panel_para *info);
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)
{
#if 0
	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},
	    },
	    {
		{LCD_CMAP_B3, LCD_CMAP_G2, LCD_CMAP_B1, LCD_CMAP_G0},
		{LCD_CMAP_R3, LCD_CMAP_B2, LCD_CMAP_R1, LCD_CMAP_B0},
		{LCD_CMAP_G3, LCD_CMAP_R2, LCD_CMAP_G1, LCD_CMAP_R0},
	    },
	};

	items = sizeof(lcd_gamma_tbl) / 2;
	for (i = 0; i < items - 1; i++) {
		u32 num = lcd_gamma_tbl[i + 1][0] - lcd_gamma_tbl[i][0];

		for (j = 0; j < num; j++) {
			u32 value = 0;

			value =
			    lcd_gamma_tbl[i][1] +
			    ((lcd_gamma_tbl[i + 1][1] - lcd_gamma_tbl[i][1]) *
			     j) /
				num;
			info->lcd_gamma_tbl[lcd_gamma_tbl[i][0] + j] =
			    (value << 16) + (value << 8) + value;
		}
	}
	info->lcd_gamma_tbl[255] = (lcd_gamma_tbl[items - 1][1] << 16) +
				   (lcd_gamma_tbl[items - 1][1] << 8) +
				   lcd_gamma_tbl[items - 1][1];

	memcpy(info->lcd_cmap_tbl, lcd_cmap_tbl, sizeof(lcd_cmap_tbl));
#endif
}

static s32 LCD_open_flow(u32 sel)
{
	LCD_OPEN_FUNC(sel, LCD_power_on, 120);
#ifdef CPU_TRI_MODE
	LCD_OPEN_FUNC(sel, LCD_panel_init, 100);
	LCD_OPEN_FUNC(sel, sunxi_lcd_tcon_enable, 50);
#else
	LCD_OPEN_FUNC(sel, sunxi_lcd_tcon_enable, 100);
	LCD_OPEN_FUNC(sel, LCD_panel_init, 50);
#endif
	LCD_OPEN_FUNC(sel, LCD_bl_open, 0);

	return 0;
}

static s32 LCD_close_flow(u32 sel)
{
	LCD_CLOSE_FUNC(sel, LCD_bl_close, 20);
#ifdef CPU_TRI_MODE
	LCD_CLOSE_FUNC(sel, sunxi_lcd_tcon_disable, 10);
	LCD_CLOSE_FUNC(sel, LCD_panel_exit, 50);
#else
	LCD_CLOSE_FUNC(sel, LCD_panel_exit, 10);
	LCD_CLOSE_FUNC(sel, sunxi_lcd_tcon_disable, 10);
#endif
	LCD_CLOSE_FUNC(sel, LCD_power_off, 0);

	return 0;
}

static void LCD_power_on(u32 sel)
{
	/*config lcd_power pin to open lcd power0 */
	sunxi_lcd_power_enable(sel, 0);
	sunxi_lcd_pin_cfg(sel, 1);

}

static void LCD_power_off(u32 sel)
{
	/*lcd_cs, active low */
	lcd_cs(1);
	sunxi_lcd_delay_ms(10);
	/*lcd_rst, active hight */
	panel_reset(1);
	sunxi_lcd_delay_ms(10);

	sunxi_lcd_pin_cfg(sel, 0);
	/*config lcd_power pin to close lcd power0 */
	sunxi_lcd_power_disable(sel, 0);
}

static void LCD_bl_open(u32 sel)
{
	sunxi_lcd_pwm_enable(sel);
	/*config lcd_bl_en pin to open lcd backlight */
	sunxi_lcd_backlight_enable(sel);
}

static void LCD_bl_close(u32 sel)
{
	/*config lcd_bl_en pin to close lcd backlight */
	sunxi_lcd_backlight_disable(sel);
	sunxi_lcd_pwm_disable(sel);
}

/*static int bootup_flag = 0;*/
static void LCD_panel_init(u32 sel)
{
	struct disp_panel_para *info =
	    kmalloc(sizeof(struct disp_panel_para), GFP_KERNEL);

	DBG_INFO("\n");
	bsp_disp_get_panel_info(sel, info);
	lcd_panel_ili9488_init(sel, info);

	kfree(info);
	return;
}

static void LCD_panel_exit(u32 sel)
{
	sunxi_lcd_cpu_write_index(0, 0x28);
    sunxi_lcd_delay_ms(10);
	sunxi_lcd_cpu_write_index(0, 0x10);
    sunxi_lcd_delay_ms(120);
}


static void lcd_panel_ili9488_init(u32 sel, struct disp_panel_para *info)
{
	DBG_INFO("\n");
	/*lcd_cs, active low */
	lcd_cs(0);
	sunxi_lcd_delay_ms(10);
	panel_reset(1);
	sunxi_lcd_delay_ms(20);
	panel_reset(0);
	sunxi_lcd_delay_ms(20);
	panel_reset(1);
	sunxi_lcd_delay_ms(120);

	sunxi_lcd_cpu_write_index(0, 0xF7);
	sunxi_lcd_cpu_write_data(0, 0xA9);
	sunxi_lcd_cpu_write_data(0, 0x51);
	sunxi_lcd_cpu_write_data(0, 0x2C);
	sunxi_lcd_cpu_write_data(0, 0x82);

	sunxi_lcd_cpu_write_index(0, 0xC0);
	sunxi_lcd_cpu_write_data(0, 0x11);
	sunxi_lcd_cpu_write_data(0, 0x09);

	sunxi_lcd_cpu_write_index(0, 0xC1);
	sunxi_lcd_cpu_write_data(0, 0x41);

	sunxi_lcd_cpu_write_index(0, 0xC5);
	sunxi_lcd_cpu_write_data(0, 0x00);
	sunxi_lcd_cpu_write_data(0, 0x2A);
	sunxi_lcd_cpu_write_data(0, 0x80);

	sunxi_lcd_cpu_write_index(0, 0xB1);
	sunxi_lcd_cpu_write_data(0, 0xB0);
	sunxi_lcd_cpu_write_data(0, 0x11);

	sunxi_lcd_cpu_write_index(0, 0xB4);
	sunxi_lcd_cpu_write_data(0, 0x02);

	sunxi_lcd_cpu_write_index(0, 0xB6);
	sunxi_lcd_cpu_write_data(0, 0x02);
	sunxi_lcd_cpu_write_data(0, 0x22);

	sunxi_lcd_cpu_write_index(0, 0xB7);
	sunxi_lcd_cpu_write_data(0, 0xC6);

	sunxi_lcd_cpu_write_index(0, 0xBE);
	sunxi_lcd_cpu_write_data(0, 0x00);
	sunxi_lcd_cpu_write_data(0, 0x04);

	sunxi_lcd_cpu_write_index(0, 0xE9);
	sunxi_lcd_cpu_write_data(0, 0x00);

	sunxi_lcd_cpu_write_index(0, 0x3A);
	sunxi_lcd_cpu_write_data(0, 0x55);

	sunxi_lcd_cpu_write_index(0, 0xE0);
	sunxi_lcd_cpu_write_data(0, 0x00);
	sunxi_lcd_cpu_write_data(0, 0x07);
	sunxi_lcd_cpu_write_data(0, 0x12);
	sunxi_lcd_cpu_write_data(0, 0x0B);
	sunxi_lcd_cpu_write_data(0, 0x18);
	sunxi_lcd_cpu_write_data(0, 0x0B);
	sunxi_lcd_cpu_write_data(0, 0x3F);
	sunxi_lcd_cpu_write_data(0, 0x9B);
	sunxi_lcd_cpu_write_data(0, 0x4B);
	sunxi_lcd_cpu_write_data(0, 0x0B);
	sunxi_lcd_cpu_write_data(0, 0x0F);
	sunxi_lcd_cpu_write_data(0, 0x0B);
	sunxi_lcd_cpu_write_data(0, 0x15);
	sunxi_lcd_cpu_write_data(0, 0x17);
	sunxi_lcd_cpu_write_data(0, 0x0F);

	sunxi_lcd_cpu_write_index(0, 0xE1);
	sunxi_lcd_cpu_write_data(0, 0x00);
	sunxi_lcd_cpu_write_data(0, 0x16);
	sunxi_lcd_cpu_write_data(0, 0x1B);
	sunxi_lcd_cpu_write_data(0, 0x02);
	sunxi_lcd_cpu_write_data(0, 0x0F);
	sunxi_lcd_cpu_write_data(0, 0x06);
	sunxi_lcd_cpu_write_data(0, 0x34);
	sunxi_lcd_cpu_write_data(0, 0x46);
	sunxi_lcd_cpu_write_data(0, 0x48);
	sunxi_lcd_cpu_write_data(0, 0x04);
	sunxi_lcd_cpu_write_data(0, 0x0D);
	sunxi_lcd_cpu_write_data(0, 0x0D);
	sunxi_lcd_cpu_write_data(0, 0x35);
	sunxi_lcd_cpu_write_data(0, 0x36);
	sunxi_lcd_cpu_write_data(0, 0x0F);

	sunxi_lcd_cpu_write_index(0, 0x2A);
	sunxi_lcd_cpu_write_data(0, 0x00);
	sunxi_lcd_cpu_write_data(0, 0x00);
	sunxi_lcd_cpu_write_data(0, 0x01);
	sunxi_lcd_cpu_write_data(0, 0xDF);

	sunxi_lcd_cpu_write_index(0, 0x2B);
	sunxi_lcd_cpu_write_data(0, 0x00);
	sunxi_lcd_cpu_write_data(0, 0x00);
	sunxi_lcd_cpu_write_data(0, 0x01);
	sunxi_lcd_cpu_write_data(0, 0x3F);

	sunxi_lcd_cpu_write_index(0, 0x36);
	sunxi_lcd_cpu_write_data(0, 0x68);


#if defined(CPU_TRI_MODE)
	/* enable te, mode 0 */

	sunxi_lcd_cpu_write_index(0, 0x35);
	sunxi_lcd_cpu_write_data(0, 0x00);

#endif
	sunxi_lcd_cpu_write_index(0, 0x11);
	sunxi_lcd_delay_ms(120);
	sunxi_lcd_cpu_write_index(0, 0x29);
	sunxi_lcd_cpu_write_index(0, 0x2c);
}


/* panel driver name, must mach the name of lcd_drv_name in sys_config.fex */
struct __lcd_panel ili9488_cpu_panel = {
	.name = "ili9488_cpu",
	.func = {
		.cfg_panel_info = LCD_cfg_panel_info,
		.cfg_open_flow = LCD_open_flow,
		.cfg_close_flow = LCD_close_flow,
	},
};

Kconfig 添加

config LCD_SUPPORT_ILI9488_CPU
	bool "LCD support ili9488_cpu panel"
	default n
	---help---
		If you want to support ili9488_cpu panel for display driver, select it.

Makefile 添加

disp-$(CONFIG_LCD_SUPPORT_ILI9488_CPU) += lcd/ili9488_cpu.o

panels.c 添加

#ifdef CONFIG_LCD_SUPPORT_ILI9488_CPU
	&ili9488_cpu_panel,
#endif

panels.h 添加

#ifdef CONFIG_LCD_SUPPORT_ILI9488_CPU
extern struct __lcd_panel ili9488_cpu_panel;
#endif

再打开 m kernel_menuconfig

Device Drivers  --->
	Graphics support  ---> 
		Frame buffer Devices  --->
			Video support for sunxi  --->
				LCD panels select  --->
					 [*] LCD support ili9488_cpu panel

修改 board.dts

disp

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

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

	screen1_output_type      = <3>;
	screen1_output_mode      = <4>;
	
	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           = <1>;
	hdmi_mode_check          = <3>;
	disp_rotation_used		 = <1>;
	degree0					 = <0>;
	fb0_format               = <10>;
	fb0_buffer_num           = <1>;	
	/*fb0_width                = <800>;*/
	/*fb0_height               = <480>;*/  /*read from lcd*/
	fb1_format               = <0>;
	fb1_width                = <0>;
	fb1_height               = <0>;
	chn_cfg_mode             = <1>;

	disp_para_zone           = <1>;
	/*VCC-LCD*/
/*	dc1sw-supply = <&reg_dc1sw>;*/
	/*VCC-DSI*/
/*	eldo3-supply = <&reg_eldo3>;*/
	/*VCC-PD*/
/*	dcdc1-supply = <&reg_dcdc1>;*/
};

lcd0

&lcd0 {

	/* part 1 */
	lcd_used            = <1>;
	lcd_driver_name     = "ili9488_cpu";

	/* part 2 */
	lcd_if              = <1>;
	lcd_cpu_if	        = <8>;

	/* part 3 */
	lcd_x               = <480>;
	lcd_y               = <320>;
	lcd_width           = <72>;
	lcd_height          = <48>;
	lcd_dclk_freq       = <10>;
	lcd_hbp             = <2>;
	lcd_ht              = <486>;
	lcd_hspw            = <2>;
	lcd_vbp             = <20>;
	lcd_vt              = <342>;
	lcd_vspw            = <2>;

	/* part 4 */
	lcd_pwm_used        = <1>;
	lcd_pwm_ch          = <8>;
	lcd_pwm_freq        = <50000>;
	lcd_pwm_pol         = <1>;
	lcd_pwm_max_limit   = <255>;
	lcd_bright_curve_en = <0>;

	/* part 5 */
	lcd_cpu_mode        = <1>;
	lcd_cpu_te          = <1>;

	/* part 6 */
	lcd_frm             = <2>;
	lcd_gamma_en        = <0>;
	lcd_cmap_en         = <0>;
	lcd_rb_swap			= <0>;

	/* part 7 */
	// reset pin
	lcd_gpio_0 = <&pio PD 0 GPIO_ACTIVE_HIGH>;
	// cs pin
	lcd_gpio_1 = <&pio PD 9 GPIO_ACTIVE_HIGH>;
	pinctrl-0 = <&rgb16_pins_a>;
	pinctrl-1 = <&rgb16_pins_b>;
};

然后在pio中添加

rgb16_pins_a: rgb16@0 {
		pins = "PD1", "PD2","PD3","PD4","PD5","PD6", "PD7", "PD8", \
				"PD10", "PD11", "PD12", "PD13", "PD14", "PD15", "PD16", "PD17", \
				"PD18", "PD19", "PD20", "PD21";
		function = "lcd0";
		drive-strength = <30>;
		bias-disable;
	};

	rgb16_pins_b: rgb16@1 {
		pins = "PD1", "PD2","PD3","PD4","PD5","PD6", "PD7", "PD8", \
				"PD10", "PD11", "PD12", "PD13", "PD14", "PD15", "PD16", "PD17", \
				"PD18", "PD19", "PD20", "PD21";
		function = "io_disabled";
		bias-disable;
	};

测试 gpsp 显示

ca5d44c6-e1ee-4864-94d7-e6c97e85998f-19DB19AA9558848CC4814892EA6EF828.png

hsinyuwang LV 6

尚未解决问题

fb0_format 修改为10 后启动 log 是绿色

fb0_format = <10>;

屏幕实时帧率与期望帧率相差较大

	lcd_x               = <480>;
	lcd_y               = <320>;
	lcd_width           = <72>;
	lcd_height          = <48>;
	lcd_dclk_freq       = <10>;
	lcd_hbp             = <2>;
	lcd_ht              = <486>;
	lcd_hspw            = <2>;
	lcd_vbp             = <20>;
	lcd_vt              = <342>;
	lcd_vspw            = <2>;

        lcd_cpu_mode        = <1>;
	lcd_cpu_te          = <1>;

QQ截图20230624193313.png

whycanservice2 LV 7

@hsinyuwang 12M的频率应该不会误差很大，你要修改 ht vt。。

soso90 LV 7

@hsinyuwang 终于看到有点i80接口的帖子，此处缺少一个原理图~~ 有机会复刻的话，到时传一个，哈哈哈

wj8331585 LV 5

请问你开启了SDL双缓冲SDL_DOUBLEBUF了吗？

我测试提示段错误。是还要配置什么环境的吗？
screen = SDL_SetVideoMode(480, 32, 16, SDL_SWSURFACE | SDL_DOUBLEBUF);

hsinyuwang LV 6

@wj8331585 DOUBLEBUF 只要驱动支持就可以

wj8331585 LV 5

@hsinyuwang 我用的是芒果派的tina linux,它支持SDL_DOUBLEBUF吗？

dyufeimen LV 2

麻烦提供一份接线图吗？我按照你的配置，屏幕没反应