linux 驱动调试笔记二----LCD驱动01

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编写安卓下的LCD驱动参考了一些网上的资料。

在 /kernel/drivers/video/msm

static int msm_fb_probe(struct platform_device *pdev){..........}

static int msm_fb_remove(struct platform_device *pdev){............}

static struct fb_ops msm_fb_ops = {.owner = THIS_MODULE,.fb_open = msm_fb_open,.fb_release = msm_fb_release,.fb_read = NULL,.fb_write = NULL,.fb_cursor = NULL,.fb_check_var = msm_fb_check_var,/* vinfo check */.fb_set_par = msm_fb_set_par,/* set the video mode according to info->var */.fb_setcolreg = NULL,/* set color register */.fb_blank = msm_fb_blank,/* blank display */.fb_pan_display = msm_fb_pan_display,/* pan display */.fb_fillrect = msm_fb_fillrect,/* Draws a rectangle */.fb_copyarea = msm_fb_copyarea,/* Copy data from area to another */.fb_imageblit = msm_fb_imageblit,/* Draws a image to the display */.fb_rotate = NULL,.fb_sync = NULL,/* wait for blit idle, optional */.fb_ioctl = msm_fb_ioctl,/* perform fb specific ioctl (optional) */.fb_mmap = msm_fb_mmap,};

..................

static struct platform_driver msm_fb_driver = {.probe = msm_fb_probe,.remove = msm_fb_remove,#ifndef CONFIG_HAS_EARLYSUSPEND.suspend = msm_fb_suspend,.resume = msm_fb_resume,#endif.shutdown = NULL,.driver = {   /* Driver name must match the device name added in platform.c. */   .name = "msm_fb",   .pm = &msm_fb_dev_pm_ops,   },};

static int msm_fb_ioctl(struct fb_info *info, unsigned int cmd,unsigned long arg)  {..............}

struct platform_device *msm_fb_add_device(struct platform_device *pdev){.....}

int __init msm_fb_init(void){int rc = -ENODEV;if (msm_fb_register_driver())return rc;#ifdef MSM_FB_ENABLE_DBGFS{struct dentry *root;if ((root = msm_fb_get_debugfs_root()) != NULL) {msm_fb_debugfs_file_create(root,   "msm_fb_msg_printing_level",   (u32 *) &msm_fb_msg_level);msm_fb_debugfs_file_create(root,   "mddi_msg_printing_level",   (u32 *) &mddi_msg_level);msm_fb_debugfs_file_create(root, "msm_fb_debug_enabled",   (u32 *) &msm_fb_debug_enabled);}}#endifreturn 0;}

2014年1月23日

拿到8x12的板子，用QPST下载好，进入shell模式：
上面是adb remount ,提示没有权限时的操作。
之后在linux虚拟机上执行以下操作：
#source build/envsetup.sh

#lunch
选择要编译的项目

#make bootimage j4 **************发现增加线程编译这个选项不可用啊
编译开始

2014年1月24日

1.建立好branch分支，开始编译，编译通过，生成boot.img
生成的boot.img下载到板子上，屏好像没有点亮起来

2014年2月11日

linux主机登陆共享文件：

添加的屏编译没有通过，通过后来的分析，命令值设置的过大，而且格式有问题：

将修改的驱动文件包含进去：

在下载boot.img 的时候，导致板子死机，然后不得不用QPST重新下载系统文件，下载之前需要将COM口禁掉，才能下载成功：

下面这种现象是下载过bootimage，fastboot reboot 之后机子居然找不到端口，提示进入emmc下载,没办法之后重新下载一遍，具体的原因还不清楚：

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