TQ335X显示分辨率修改1024*768 15寸lcd

内核阅读工具：source insight

内核版本： linux 3.2.0

必备文件：AM335X芯片手册；AM335X技术参考手册；AM335X产品勘误表

分辨率修改，需要修改kernel和boot文件，kernel需要修改如下

1、335X的引脚分配定义文件在 board-am335xevm.c中，我的默认是24色，可根据自己的需要定义，此处需要用到 技术手册和数据手册。该部分内容网上可以查到。

/* Module pin mux for LCDC */
static struct pinmux_config lcdc_pin_mux[] = {
{"lcd_data0.lcd_data0", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT
      | AM33XX_PULL_DOWN | AM33XX_PULL_ENBL},
{"lcd_data1.lcd_data1", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT
      | AM33XX_PULL_DOWN | AM33XX_PULL_ENBL},
{"lcd_data2.lcd_data2", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT
      | AM33XX_PULL_DOWN | AM33XX_PULL_ENBL},
{"lcd_data3.lcd_data3", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT
      | AM33XX_PULL_DOWN | AM33XX_PULL_ENBL},
{"lcd_data4.lcd_data4", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT
      | AM33XX_PULL_DOWN | AM33XX_PULL_ENBL},
{"lcd_data5.lcd_data5", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT
      | AM33XX_PULL_DOWN | AM33XX_PULL_ENBL},
{"lcd_data6.lcd_data6", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT
      | AM33XX_PULL_DOWN | AM33XX_PULL_ENBL},
{"lcd_data7.lcd_data7", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT
      | AM33XX_PULL_DOWN | AM33XX_PULL_ENBL},
{"lcd_data8.lcd_data8", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT
      | AM33XX_PULL_DOWN | AM33XX_PULL_ENBL},
{"lcd_data9.lcd_data9", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT
      | AM33XX_PULL_DOWN | AM33XX_PULL_ENBL},
{"lcd_data10.lcd_data10", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT
      | AM33XX_PULL_DOWN | AM33XX_PULL_ENBL},
{"lcd_data11.lcd_data11", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT
      | AM33XX_PULL_DOWN | AM33XX_PULL_ENBL},
{"lcd_data12.lcd_data12", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT
      | AM33XX_PULL_DOWN | AM33XX_PULL_ENBL},
{"lcd_data13.lcd_data13", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT
      | AM33XX_PULL_DOWN | AM33XX_PULL_ENBL},
{"lcd_data14.lcd_data14", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT
      | AM33XX_PULL_DOWN | AM33XX_PULL_ENBL},
{"lcd_data15.lcd_data15", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT
      | AM33XX_PULL_DOWN | AM33XX_PULL_ENBL},
{"gpmc_ad8.lcd_data16", OMAP_MUX_MODE1 | AM33XX_PIN_OUTPUT
      | AM33XX_PULL_DOWN | AM33XX_PULL_ENBL},
{"gpmc_ad9.lcd_data17", OMAP_MUX_MODE1 | AM33XX_PIN_OUTPUT
      | AM33XX_PULL_DOWN | AM33XX_PULL_ENBL},
{"gpmc_ad10.lcd_data18", OMAP_MUX_MODE1 | AM33XX_PIN_OUTPUT
      | AM33XX_PULL_DOWN | AM33XX_PULL_ENBL},
{"gpmc_ad11.lcd_data19", OMAP_MUX_MODE1 | AM33XX_PIN_OUTPUT
      | AM33XX_PULL_DOWN | AM33XX_PULL_ENBL},
{"gpmc_ad12.lcd_data20", OMAP_MUX_MODE1 | AM33XX_PIN_OUTPUT
      | AM33XX_PULL_DOWN | AM33XX_PULL_ENBL},
{"gpmc_ad13.lcd_data21", OMAP_MUX_MODE1 | AM33XX_PIN_OUTPUT
      | AM33XX_PULL_DOWN | AM33XX_PULL_ENBL},
{"gpmc_ad14.lcd_data22", OMAP_MUX_MODE1 | AM33XX_PIN_OUTPUT
      | AM33XX_PULL_DOWN | AM33XX_PULL_ENBL},
{"gpmc_ad15.lcd_data23", OMAP_MUX_MODE1 | AM33XX_PIN_OUTPUT
      | AM33XX_PULL_DOWN | AM33XX_PULL_ENBL},
{"lcd_vsync.lcd_vsync", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT},
{"lcd_hsync.lcd_hsync", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT},
{"lcd_pclk.lcd_pclk", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT},
{"lcd_ac_bias_en.lcd_ac_bias_en", OMAP_MUX_MODE0 | AM33XX_PIN_OUTPUT},
{NULL, 0},
};

更加自己底板设计和屏的参数，选择性修改

2、显示驱动文件 Da8xx-fb.c

我直接注释掉了该部分内容，并添加红线部分。

3、boot的修改embedsky_lcd_parameters.c文件，我也是注释掉我不需要的部分，添加我的屏幕参数

补充：过程中发现，如果显示565和888在硬件上是有区别的 在勘误表中有描述