灭屏取消过温减流功能

01> thermal温度检测处理函数：kernel-3.18/drivers/misc/mediatek/thermal/common/coolers/mtk_cooler_bcct.c

static void mtk_cl_bcct_set_bcct_limit(void)
{
    /* TODO: optimize */
    int i = 0;
    int min_limit = 65535;

    for (; i < MAX_NUM_INSTANCE_MTK_COOLER_BCCT; i++) {
        unsigned long curr_state;

        MTK_CL_BCCT_GET_CURR_STATE(curr_state, cl_bcct_state[i]);
        if (1 == curr_state) {

            int limit;

            MTK_CL_BCCT_GET_LIMIT(limit, cl_bcct_state[i]); //计算温度对应电流函数A；
            if ((min_limit > limit) && (limit > 0))
                min_limit = limit;
        }
    }

    if (min_limit != cl_bcct_cur_limit) {
        cl_bcct_cur_limit = min_limit;

        if (65535 <= cl_bcct_cur_limit) {    //mtk默认65000，也就是函数A值小于该值走else；
            set_bat_charging_current_limit(-1);   //line_charging中减流实际动作函数；
            mtk_cooler_bcct_dprintk_always("mtk_cl_bcct_set_bcct_limit() limit=-1\n");
        } else {
                set_bat_charging_current_limit(cl_bcct_cur_limit); //走此
            mtk_cooler_bcct_dprintk_always("mtk_cl_bcct_set_bcct_limit() limit=%d\n",
                               cl_bcct_cur_limit);
        }

        mtk_cooler_bcct_dprintk_always("mtk_cl_bcct_set_bcct_limit() real limit=%d\n",
                           get_bat_charging_current_level() / 100);

    }
}

 ---

在 thermal.conf表中打开过温检测后，该程序10s扫描2次，周一5秒；

在：

static int mtk_cl_bcct_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state)
{
    mtk_cooler_bcct_dprintk("mtk_cl_bcct_set_cur_state() %s %lu\n", cdev->type, state);
    printk("mtk_cl_bcct_set_cur_state() %s %lu\n", cdev->type, state);  //state为软件部分判断温度后识别值，传入kernel；（值为0,1）
    MTK_CL_BCCT_SET_CURR_STATE(state, *((unsigned long *)cdev->devdata));
    mtk_cl_bcct_set_bcct_limit();                                                                                                    
    mtk_cooler_bcct_dprintk("mtk_cl_bcct_set_cur_state() %s limit=%d\n", cdev->type,
                get_bat_charging_current_level() / 100);

    return 0;
}

 

02>line_charging中:

①引入lcm亮度检测函数：

extern unsigned int mt_get_bl_brightness(void);

 

 

②对set_bat_charging_current_limit（）函数处理：

unsigned int set_bat_charging_current_limit(int current_limit)
{
    battery_log(BAT_LOG_CRTI, "[BATTERY] set_bat_charging_current_limit (%d)\r\n",
            current_limit);

    if (current_limit != -1) {
        g_bcct_flag = 1;

        if (current_limit < 70)
            g_temp_CC_value = CHARGE_CURRENT_0_00_MA;
        else if (current_limit < 200)
            g_temp_CC_value = CHARGE_CURRENT_70_00_MA;

 

改为：

unsigned int set_bat_charging_current_limit(int current_limit)
{
    battery_log(BAT_LOG_CRTI, "[BATTERY] set_bat_charging_current_limit (%d)\r\n",
            current_limit);

    if ( (current_limit != -1) && (mt_get_bl_brightness() != 0) )
    {
        g_bcct_flag = 1;

        if (current_limit < 70)
            g_temp_CC_value = CHARGE_CURRENT_0_00_MA;
        else if (current_limit < 200)
            g_temp_CC_value = CHARGE_CURRENT_70_00_MA;
        else if (current_limit < 300)

 

 log：

<3>[  730.985645]  (0)[181:bat_thread_kthr]AvgVbat=(3761,3896),AvgI=(688,1029),VChr=5213,AvgT=(25,25),SOC=(3,3),UI_SOC=3,ZCV=3777 bcct:0:0 I:120000

 

---

<3>[  812.105116]  (0)[181:bat_thread_kthr]AvgVbat=(3783,3790),AvgI=(688,573),VChr=5166,AvgT=(25,25),SOC=(4,4),UI_SOC=4,ZCV=3738 bcct:1:0 I:65000

 

---

 

<7>[ 1201.987442]  (0)[4115:kworker/0:0][name:mtk_cooler_bcct&][thermal/cooler/bcct]mtk_cl_bcct_set_bcct_limit() limit=650
<7>[ 1201.987461]  (0)[4115:kworker/0:0][name:mtk_cooler_bcct&][thermal/cooler/bcct]mtk_cl_bcct_set_bcct_limit() real limit=1200

 

 --

 -

adb shell system/vendor/bin/thermal_manager vendor/etc/.tp/.ht120.mtc

2)关闭之后验证，获取配置的cmd:
adb shell cat data/.tp/.settings
如果是120则是：vendor/etc/.tp/.ht120.mtc

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