Android pow键唤醒慢调试记录

9820e在Android4.4按power键唤醒用时过长，需要1s多左右，首先抓kernel日志

01-11 20:18:06.822 <6>[ 1159.282626] c0 [KEY] Key:Power Key ScanCode:116 Value:1  // power键按下
01-11 20:18:06.832 <6>[ 1159.286398] c1 [SPRD_KPLED_INFO]sprd_kpled_set!
01-11 20:18:06.832 <6>[ 1159.286411] c1 [SPRD_KPLED_INFO]led->chip_version=3
01-11 20:18:06.832 <6>[ 1159.286416] c1 [SPRD_KPLED_INFO]led->brightness_max=128
01-11 20:18:06.832 <6>[ 1159.286420] c1 [SPRD_KPLED_INFO]led->run_mode=0
01-11 20:18:06.832 <6>[ 1159.286425] c1 [SPRD_KPLED_INFO]led->reg_kpled_ctrl0=0x2ac
01-11 20:18:06.832 <6>[ 1159.286430] c1 [SPRD_KPLED_INFO]led->reg_kpled_ctrl1=0x2b0
01-11 20:18:06.832 <6>[ 1159.286468] c1 [SPRD_KPLED_INFO]sprd_kpled_ldo_switch power=1
01-11 20:18:06.832 <6>[ 1159.286474] c1 [SPRD_KPLED_INFO]reg:0x00000EB0 ldo_pd_mask:0x00007F8A  ldo_pd_value:0x00007F8A
01-11 20:18:06.832 <6>[ 1159.286506] c1 [SPRD_KPLED_INFO]sprd_kpled_enable
01-11 20:18:06.832 <6>[ 1159.286515] c1 [SPRD_KPLED_INFO]sprd_kpled_set_brightness:led->run_mode = 0
01-11 20:18:06.832 <6>[ 1159.286545] c1 [SPRD_KPLED_INFO]reg:0x00000EB0 set_val:0x00007F80 brightness:255
01-11 20:18:06.842 <6>[ 1159.303355] c1 wlan sprd-wlan wlan0: sprdwl_set_power_save: set suspend mode,value : 1
01-11 20:18:06.842 <6>[ 1159.303378] c1 ieee80211 phy0: [1159280]mode 1 send[WIFI_CMD_POWER_SAVE]
01-11 20:18:06.844 <6>[ 1159.304502] c0 ieee80211 phy0: mode 1 recv rsp[WIFI_CMD_POWER_SAVE]
01-11 20:18:06.863 <6>[ 1159.324147] c0 [sprd-adf][       panel_suspend] panel suspend OK
01-11 20:18:06.863 <6>[ 1159.324166] c0 [sprd-adf][      swdispc_uninit] swdispc uninit
01-11 20:18:06.863 <6>[ 1159.324172] c0 [sprd-adf][  sprd_dispc_suspend] dispc suspend OK
01-11 20:18:06.863 <6>[ 1159.324178] c0 [sprd-adf][    sprd_adf_suspend] adf suspend end
01-11 20:18:06.872 <3>[ 1159.325903] c1 [sprd-adf][     sprd_dispc_flip] dispc is not initialized!
01-11 20:18:06.872 <6>[ 1159.327113] c0 [sprd-adf][     sprd_adf_resume] adf resume