展讯驱动入门

展讯驱动入门

fastboot download cmd:

   fastboot flash uboot u-boot.bin

   fastboot flash boot boot.img

LCM

基础知识：http://blog.chinaunix.net/uid-28454895-id-4216124.html

code path: kernel/drivers/video/sprdfb/lcd

kernel/drivers/video/backlight

u-boot64/drivers/video/sprdfb/lcd

porting：

U-boot:

u-boot64/include/configs/sp7731ceb.h +#define CONFIG_FB_LCD_ILI9806E_MIPI   u已在sprocomm中添加 

 

u-boot64/drivers/video/sprdfb/lcd/Makefile

+obj-$(CONFIG_FB_LCD_ILI9806E_MIPI)  += lcd_ili9806e_mipi.o  u本来就有

 

u-boot64/drivers/video/sprdfb/sprdfb_panel.c u本来就有

加extern struct panel_spec lcd_ili9806e_mipi_spec;

panel_cfg里面加

#ifdef CONFIG_FB_LCD_ILI9806E_MIPI

{

    .lcd_id = 0x4,

    .panel = &lcd_ili9806e_mipi_spec,

},

#endif

panel_info   =================没加

u-boot64/drivers/video/sprdfb/lcd

+lcd_ili9806e_mipi.c     u在sprocomm中添加

 

根据id脚兼容模组：

u-boot64/drivers/video/sprdfb/sprdfb_main.c

+static uint32_t lcd_id_vol_to_kernel = 0;

 

+int get_lcd_id_value(unsigned int gpio)

+{

+    int lcd_id_value; 

+    sprd_gpio_request(NULL,gpio); 

+    sprd_gpio_direction_input(NULL,gpio); 

+    lcd_id_value = sprd_gpio_get(NULL,gpio); 

+

+    return lcd_id_value?1:0; 

+}

+void save_lcd_id_vol_to_kernel(uint32_t id_vol)

+{ 

+    lcd_id_vol_to_kernel = id_vol;

+}

+

+uint32_t load_lcd_id_vol_to_kernel(void)

+{

+    return lcd_id_vol_to_kernel;

+}