目录

一、读取显示屏id

二、区分不同屏幕id

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一、读取显示屏id

相关函数	int mdss_dsi_panel_initialize（）
文件路径	/home/scooper/workspace/ljh/sdm450/bootable/bootloader/lk/platform/msm_shared/mipi_dsi.c

int mdss_dsi_panel_initialize(struct mipi_panel_info *mipi, uint32_t
		broadcast)
{    ……mdss_dsi_cmds_tx(mipi, &read_da_start_cmd, 1, 0);//下发读取id的指令mdss_dsi_cmds_rx(mipi, &lcm, 1, 1);//读取显示屏返回的id地址
	data1 = ntohl(*lcm);        //数据处理
	lk_lcd_id = data1 >> 8;    //去除低八位，保留高八位dprintf(CRITICAL, "lk_lcd_id =0x%x\n",lk_lcd_id )
    ……
}   

二、区分不同屏幕id

相关函数	int oem_panel_select（）
文件路径	/home/scooper/workspace/ljh/sdm450/bootable/bootloader/lk/target/P326/oem_panel.c

int oem_panel_select(const char *panel_name, struct panel_struct *panelstruct,struct msm_panel_info *pinfo,	struct dss_dsi_phy_ctrl *phy_db)
{
……
switch (hw_id) {case HW_PLATFORM_MTP:case HW_PLATFORM_SURF:case HW_PLATFORM_RCM:
        panel_id = TRULY_1080P_VIDEO_PANEL;break;case HW_PLATFORM_QRD:if(lk_lcd_id == 0x213000)   
        panel_id = ST7701S_WVGA_VIDEO_PANEL;else
        panel_id = ST7701S_3_WVGA_VIDEO_PANEL;break;default:dprintf(CRITICAL, "Display not enabled for %d HW type\n",
            hw_id);return PANEL_TYPE_UNKNOWN;}
……}