Linux驱动之mipi接口的LCD设备添加过程

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记录供以后参考用

void __init msm_fb_add_devices(void)

{

int rc = 0;

msm7x27a_set_display_params(prim_panel_name);

if (machine_is_msm8225_xxx()){

if (cpu_is_msm8625q())

mipi_dsi_pdata.dlane_swap = 0;

platform_add_devices(xxx_fb_devices,

ARRAY_SIZE(xxx_fb_devices));

}
****************************************
****************************************
msm_fb_register_device("mdp", &mdp_pdata);
***************************************
***************************************
#ifdef CONFIG_FB_MSM_MIPI_DSI
msm_fb_register_device("mipi_dsi", &mipi_dsi_pdata);
#endif
***************************************
***************************************

}

（一）platform_add_devices(xxx_fb_devices,ARRAY_SIZE(xxx_fb_devices));

  ----->
     static struct platform_device *xxx_fb_devices[] __initdata = {
              &msm_fb_device,
     };

------>
   /*该设备在sysfs中显示为msm_fb.0*/
   static struct platform_device msm_fb_device = {
.name   = "msm_fb",
.id     = 0,
.num_resources  = ARRAY_SIZE(msm_fb_resources),
.resource       = msm_fb_resources,
.dev    = {
.platform_data = &msm_fb_pdata,
}
};

    ----->
      static struct msm_fb_platform_data msm_fb_pdata = {
      .detect_client = msm_fb_detect_panel,
      };

       ----->
         static int msm_fb_detect_panel(const char *name)
{
int ret = -ENODEV;
printk("%s: %s\n", __func__, name);
if (machine_is_msm8225_xxx()) {
ret = xxx_auto_match_lcd_panel(name);
}
else if  {
    **************************************
    **************************************
    }
return ret;
}

----->
static int xxx_auto_match_lcd_panel(const char *name)
{
int ret = -ENODEV;
#if defined(CONFIG_xxx)
     ******************************
     ******************************
#elif defined(CONFIG_xxxxxx)
if(lcd_id1 == 1 ){
if (!strcmp(name, "mipi_video_xxxx_qhd"))
                // id1=1, id2=0,id3=1
ret = 0;
}else{
if (!strcmp(name, "mipi_video_xxxxxxx_qhd"))
                // id1=0, id2=0,id3=1
ret = 0;
}
#endif
return ret;
}

（二）msm_fb_register_device("mdp", &mdp_pdata);

----->
static struct msm_panel_common_pdata mdp_pdata = {
.gpio = 97,
.mdp_rev = MDP_REV_303,
.cont_splash_enabled = 0x1,
};

void __init msm_fb_register_device(char *name, void *data)
{
if (!strncmp(name, "mdp", 3)) {
if (cpu_is_msm8625() || cpu_is_msm8625q())
      msm_register_device(&msm8625_mdp_device, data);
else
     msm_register_device(&msm_mdp_device, data);
} else if (!strncmp(name, "mipi_dsi", 8)) {
       if (cpu_is_msm8625() || cpu_is_msm8625q()) {
       msm_register_device(&msm8625_mipi_dsi_device, data);
       mipi_dsi_device = msm8625_mipi_dsi_device;
        }
    else *****************
    }
}

--------->
  static struct resource msm8625_mdp_resources[] = {
{
.name   = "mdp",
.start  = MDP_BASE,
.end    = MDP_BASE + 0x000F1008 - 1,
.flags  = IORESOURCE_MEM,
},
{
.start  = MSM8625_INT_MDP,
.end    = MSM8625_INT_MDP,
.flags  = IORESOURCE_IRQ,
},
};

/*platform device : mdp.0 in sysfs*/
static struct platform_device msm8625_mdp_device = {
.name   = "mdp",
.id     = 0,
.num_resources  = ARRAY_SIZE(msm8625_mdp_resources),
.resource       = msm8625_mdp_resources,
};
static void __init msm_register_device(struct platform_device *pdev, void *data)
{
int ret;
pdev->dev.platform_data = data;
ret = platform_device_register(pdev);
if (ret)
dev_err(&pdev->dev,
"%s: platform_device_register() failed = %d\n",
__func__, ret);
}

(三)msm_fb_register_device("mipi_dsi", &mipi_dsi_pdata);

------->
  static struct mipi_dsi_platform_data mipi_dsi_pdata = {
.vsync_gpio = MDP_303_VSYNC_GPIO,
.dsi_power_save= mipi_dsi_panel_power,
                        /*configure the lcd_reset pin*/
.dsi_client_reset       = msm_fb_dsi_client_reset,
                  /*getting lcd id and enabling backlight*/
.get_lane_config= msm_fb_get_lane_config,
.splash_is_enabled= mipi_dsi_splash_is_enabled,
.dlane_swap = 0x1,
};

至于msm_fb_register_device（）参照（二）的实现