Rockchip PX30/RK3326 Android开机时间优化

RK的kernel是一个通用版本的kernel，为了兼容各个芯片会把每个芯片的配置和产品上面的需要的外设都配置编译，这样就会导致kernel的加载的驱动模块很多，拖慢开机速度，而这些驱动中有一些是具体产品上没有用到的，可以进行删减的。按这个思路我们可以针对每个具体的产品对kernel进行瘦身裁剪，下面以PX30和RK3326芯片平台为例进行裁剪。
具体的kernel模块加载时间和模块信息可以通过下面的文章获取
kernel打印模块驱动加载时间

裁剪前后的固件和开机时间对比

项目	kernel裁剪前	kernel裁剪后
kernel.img固件大小	31M	25M
uboot启动耗时	871.766 ms	826.115 ms
kernel启动完到init	1.273138s	1.200982s
android启动完成	29.871925s	23.537320s

启动时间可以根据如下log判断：

• uboot启动时间

Adding bank: 0x00200000 - 0x08400000 (size: 0x08200000)
Adding bank: 0x08c00000 - 0x80000000 (size: 0x77400000)
Total: 826.115 ms

• kernel阶段

[    1.215979] Run /init as init process
[    1.226837] init: init first stage started!

• android阶段

[   23.537320] init: Service 'bootanim' (pid 151) exited with status 0 oneshot service took 19.760000 seconds in background
[   23.537402] init: Sending signal 9 to service 'bootanim' (pid 151) process group...

裁剪内容

裁剪主要是对rockchip_defconfig的配置内容进行裁剪，具体如下：

diff --git a/arch/arm64/configs/rockchip_defconfig b/arch/arm64/configs/rockchip_defconfig
old mode 100644
new mode 100755
index b0f9a348a881..6be9a9d1a48b
--- a/arch/arm64/configs/rockchip_defconfig
+++ b/arch/arm64/configs/rockchip_defconfig
@@ -10,9 +10,9 @@ CONFIG_TASK_DELAY_ACCT=yCONFIG_TASK_XACCT=yCONFIG_TASK_IO_ACCOUNTING=yCONFIG_PSI=y# 把内核的配置信息编译进内核中,以后可以通过scripts/extract-ikconfig脚本从内核镜像中提取这些信息， 可以去掉
-CONFIG_IKCONFIG=y
-CONFIG_IKCONFIG_PROC=y
-CONFIG_IKHEADERS=m
+# CONFIG_IKCONFIG is not set
+# CONFIG_IKCONFIG_PROC is not set
+# CONFIG_IKHEADERS is not setCONFIG_LOG_BUF_SHIFT=19CONFIG_CGROUPS=yCONFIG_MEMCG=y
@@ -44,10 +44,10 @@ CONFIG_EMBEDDED=y# CONFIG_COMPAT_BRK is not setCONFIG_PROFILING=yCONFIG_ARCH_ROCKCHIP=y#PCIE的配置，可以根据产品需要进行配置，因为PX30开发板上面没有PCIE，所以这里就删掉PCIE配置
-CONFIG_PCI=y
-CONFIG_PCIEPORTBUS=y
-CONFIG_PCIE_ROCKCHIP_HOST=y
-CONFIG_PCIE_DW_ROCKCHIP=y
+# CONFIG_PCI is not set
+# CONFIG_PCIEPORTBUS is not set
+# CONFIG_PCIE_ROCKCHIP_HOST is not set
+# CONFIG_PCIE_DW_ROCKCHIP is not set# CONFIG_ARM64_ERRATUM_826319 is not set# CONFIG_ARM64_ERRATUM_827319 is not set# CONFIG_ARM64_ERRATUM_824069 is not set@@ -78,8 +78,8 @@ CONFIG_COMPAT=yCONFIG_PM_WAKELOCKS=yCONFIG_PM_WAKELOCKS_LIMIT=0# CONFIG_PM_WAKELOCKS_GC is not set
-CONFIG_PM_DEBUG=y
-CONFIG_PM_ADVANCED_DEBUG=y
+#CONFIG_PM_DEBUG=y
+#CONFIG_PM_ADVANCED_DEBUG=yCONFIG_ENERGY_MODEL=yCONFIG_CPU_IDLE=yCONFIG_ARM_CPUIDLE=y
@@ -288,7 +288,7 @@ CONFIG_DM_DEFAULT_KEY=yCONFIG_DM_SNAPSHOT=yCONFIG_DM_UEVENT=yCONFIG_DM_VERITY=y#AVB功能，根据Android上层是否开启AVB来确定是否配置
-CONFIG_DM_VERITY_AVB=y
+#CONFIG_DM_VERITY_AVB=yCONFIG_DM_VERITY_FEC=yCONFIG_DM_BOW=yCONFIG_DM_ANDROID_VERITY_AT_MOST_ONCE_DEFAULT_ENABLED=y
@@ -357,7 +357,7 @@ CONFIG_STMMAC_ETH=y# CONFIG_NET_VENDOR_VIA is not set# CONFIG_NET_VENDOR_WIZNET is not setCONFIG_ROCKCHIP_PHY=y# RK630根据产品需要进行配置，PX30开发板上面没有所以去掉
-CONFIG_RK630_PHY=y
+# CONFIG_RK630_PHY is not setCONFIG_PPP=yCONFIG_PPP_BSDCOMP=yCONFIG_PPP_DEFLATE=y
@@ -375,27 +375,27 @@ CONFIG_SLIP_MODE_SLIP6=yCONFIG_USB_CATC=yCONFIG_USB_KAWETH=yCONFIG_USB_PEGASUS=y#USB转以太网模块，根据产品需要进行配置，PX30开发板上面没有所以去掉
-CONFIG_USB_RTL8150=y
-CONFIG_USB_RTL8152=y
+# CONFIG_USB_RTL8150 is not set
+# CONFIG_USB_RTL8152 is not setCONFIG_USB_USBNET=yCONFIG_USB_NET_CDC_EEM=yCONFIG_USB_NET_CDC_MBIM=y#USB网卡，根据产品需要进行配置，PX30开发板上面没有所以去掉
-CONFIG_USB_NET_DM9601=y
-CONFIG_USB_NET_SMSC75XX=y
-CONFIG_USB_NET_SMSC95XX=y
-CONFIG_USB_NET_GL620A=y
+# CONFIG_USB_NET_DM9601 is not set
+# CONFIG_USB_NET_SMSC75XX is not set
+# CONFIG_USB_NET_SMSC95XX is not set
+# CONFIG_USB_NET_GL620A is not setCONFIG_USB_NET_PLUSB=y
-CONFIG_USB_NET_MCS7830=y
-CONFIG_USB_NET_RNDIS_HOST=y
-CONFIG_USB_ALI_M5632=y
-CONFIG_USB_AN2720=y
-CONFIG_USB_EPSON2888=y
-CONFIG_USB_KC2190=y
-CONFIG_USB_NET_CX82310_ETH=y
+# CONFIG_USB_NET_MCS7830 is not set
+# CONFIG_USB_NET_RNDIS_HOST=y
+# CONFIG_USB_ALI_M5632 is not set
+# CONFIG_USB_AN2720 is not set
+# CONFIG_USB_EPSON2888 is not set
+# CONFIG_USB_KC2190 is not set
+# CONFIG_USB_NET_CX82310_ETH is not setCONFIG_USB_NET_KALMIA=yCONFIG_USB_NET_QMI_WWAN=yCONFIG_USB_HSO=y
-CONFIG_USB_NET_INT51X1=y
+# CONFIG_USB_NET_INT51X1 is not setCONFIG_USB_IPHETH=yCONFIG_USB_SIERRA_NET=y# CONFIG_WLAN_VENDOR_ADMTEK is not set
@@ -417,80 +417,80 @@ CONFIG_USB_SIERRA_NET=yCONFIG_WL_ROCKCHIP=yCONFIG_WIFI_BUILD_MODULE=y#WIFI模块，根据产品需要进行配置，PX30开发板上面用的是AP6XXX，其他的几个配置去掉CONFIG_AP6XXX=m
-CONFIG_RTL8723CS=m
-CONFIG_RTL8821CS=m
-CONFIG_RTL8822BS=m
-CONFIG_LTE=y
-CONFIG_LTE_RM310=y
+# CONFIG_RTL8723CS is not set
+# CONFIG_RTL8821CS is not set
+# CONFIG_RTL8822BS is not set
+# CONFIG_LTE is not set
+# CONFIG_LTE_RM310 is not setCONFIG_INPUT_EVDEV=yCONFIG_KEYBOARD_ADC=y# CONFIG_KEYBOARD_ATKBD is not set#通过GPIO来做按键，PX30EVB板子是通过ADC，所以这里去掉GPIO的配置项
-CONFIG_KEYBOARD_GPIO=y
+# CONFIG_KEYBOARD_GPIO is not set# CONFIG_INPUT_MOUSE is not setCONFIG_INPUT_JOYSTICK=yCONFIG_JOYSTICK_XPAD=yCONFIG_JOYSTICK_XPAD_FF=yCONFIG_JOYSTICK_XPAD_LEDS=y#USB触摸板，根据需要配置，PX30开发板上面没有所以去掉
-CONFIG_INPUT_TABLET=y
-CONFIG_TABLET_USB_ACECAD=y
-CONFIG_TABLET_USB_AIPTEK=y
-CONFIG_TABLET_USB_GTCO=y
-CONFIG_TABLET_USB_HANWANG=y
-CONFIG_TABLET_USB_KBTAB=y
+#CONFIG_INPUT_TABLET is not set
+#CONFIG_TABLET_USB_ACECAD is not set
+#CONFIG_TABLET_USB_AIPTEK is not set
+#CONFIG_TABLET_USB_GTCO is not set
+#CONFIG_TABLET_USB_HANWANG is not set
+#CONFIG_TABLET_USB_KBTAB= is not setCONFIG_INPUT_TOUCHSCREEN=y#触摸屏，根据需要配置，PX30开发板用的是GT1X，其他的没用所以去掉，只留下需要的CONFIG_INPUT_TOUCHSCREEN=y
-CONFIG_TOUCHSCREEN_GSLX6801=y
-CONFIG_TOUCHSCREEN_GSLX680_PAD=y
-CONFIG_TOUCHSCREEN_GSLX680_VR=y
-CONFIG_TOUCHSCREEN_GSL3673=y
-CONFIG_TOUCHSCREEN_GSL3673_800X1280=y
-CONFIG_TOUCHSCREEN_GSL3676=y
-CONFIG_TOUCHSCREEN_GT9XX=y
-CONFIG_TOUCHSCREEN_HYN_CST2XX=y
-CONFIG_TOUCHSCREEN_WACOM_W9013=y
+#CONFIG_TOUCHSCREEN_GSLX6801=y
+#CONFIG_TOUCHSCREEN_GSLX680_PAD=y
+#CONFIG_TOUCHSCREEN_GSLX680_VR=y
+#CONFIG_TOUCHSCREEN_GSL3673=y
+#CONFIG_TOUCHSCREEN_GSL3673_800X1280=y
+#CONFIG_TOUCHSCREEN_GSL3676=y
+#CONFIG_TOUCHSCREEN_GT9XX=y
+#CONFIG_TOUCHSCREEN_HYN_CST2XX=y
+#CONFIG_TOUCHSCREEN_WACOM_W9013=yCONFIG_TOUCHSCREEN_GT1X=y
-CONFIG_TOUCHSCREEN_FTS=y
-CONFIG_TOUCHSCREEN_CYPRESS_CYTTSP5=y
-CONFIG_TOUCHSCREEN_CYPRESS_CYTTSP5_DEVICETREE_SUPPORT=y
-CONFIG_TOUCHSCREEN_CYPRESS_CYTTSP5_I2C=y
-CONFIG_TOUCHSCREEN_CYPRESS_CYTTSP5_DEVICE_ACCESS=y
-CONFIG_TOUCHSCREEN_CYPRESS_CYTTSP5_LOADER=y
-CONFIG_ROCKCHIP_REMOTECTL=y
-CONFIG_ROCKCHIP_REMOTECTL_PWM=y
# SENSOR相关的配置，根据需要配置，PX30 EVB没有sensor所以都去掉
-CONFIG_SENSOR_DEVICE=y
-CONFIG_GSENSOR_DEVICE=y
-CONFIG_GS_MMA8452=y
-CONFIG_MPU6880_ACC=y
-CONFIG_MPU6500_ACC=y
-CONFIG_GS_KXTJ9=y
-CONFIG_GS_LIS3DH=y
-CONFIG_GS_MMA7660=y
-CONFIG_GS_MC3230=y
-CONFIG_GS_SC7660=y
-CONFIG_GS_SC7A20=y
-CONFIG_GS_SC7A30=y
-CONFIG_GS_MXC6655XA=y
-CONFIG_GS_LSM303D=y
-CONFIG_LSM330_ACC=y
-CONFIG_BMA2XX_ACC=y
-CONFIG_GS_DA223=y
-CONFIG_COMPASS_DEVICE=y
-CONFIG_COMPASS_AK8975=y
-CONFIG_COMPASS_AK8963=y
-CONFIG_GYROSCOPE_DEVICE=y
-CONFIG_GYRO_L3G4200D=y
-CONFIG_GYRO_L3G20D=y
-CONFIG_GYRO_EWTSA=y
-CONFIG_GYRO_MPU6500=y
-CONFIG_GYRO_MPU6880=y
-CONFIG_GYRO_LSM330=y
-CONFIG_LIGHT_DEVICE=y
-CONFIG_LS_CM3217=y
-CONFIG_LS_CM3218=y
-CONFIG_LS_STK3410=y
-CONFIG_PROXIMITY_DEVICE=y
-CONFIG_PS_STK3410=y
-CONFIG_HALL_DEVICE=y
-CONFIG_HS_MH248=y
+#CONFIG_TOUCHSCREEN_FTS is not set
+#CONFIG_TOUCHSCREEN_CYPRESS_CYTTSP5 is not set
+#CONFIG_TOUCHSCREEN_CYPRESS_CYTTSP5_DEVICETREE_SUPPORT is not set
+#CONFIG_TOUCHSCREEN_CYPRESS_CYTTSP5_I2C is not set
+#CONFIG_TOUCHSCREEN_CYPRESS_CYTTSP5_DEVICE_ACCESS is not set
+#CONFIG_TOUCHSCREEN_CYPRESS_CYTTSP5_LOADER is not set
+#CONFIG_ROCKCHIP_REMOTECTL is not set
+#CONFIG_ROCKCHIP_REMOTECTL_PWM is not set
+#CONFIG_SENSOR_DEVICE is not set
+#CONFIG_GSENSOR_DEVICE is not set
+#CONFIG_GS_MMA8452 is not set
+#CONFIG_MPU6880_ACC is not set
+#CONFIG_MPU6500_ACC is not set
+#CONFIG_GS_KXTJ9 is not set
+#CONFIG_GS_LIS3DH is not set
+#CONFIG_GS_MMA7660 is not set
+#CONFIG_GS_MC3230 is not set
+#CONFIG_GS_SC7660 is not set
+#CONFIG_GS_SC7A20 is not set
+#CONFIG_GS_SC7A30 is not set
+#CONFIG_GS_MXC6655XA is not set
+#CONFIG_GS_LSM303D is not set
+#CONFIG_LSM330_ACC is not set
+#CONFIG_BMA2XX_ACC is not set
+#CONFIG_GS_DA223 is not set
+#CONFIG_COMPASS_DEVICE is not set
+#CONFIG_COMPASS_AK8975 is not set
+#CONFIG_COMPASS_AK8963 is not set
+#CONFIG_GYROSCOPE_DEVICE is not set
+#CONFIG_GYRO_L3G4200D is not set
+#CONFIG_GYRO_L3G20D is not set
+#CONFIG_GYRO_EWTSA is not set
+#CONFIG_GYRO_MPU6500 is not set
+#CONFIG_GYRO_MPU6880 is not set
+#CONFIG_GYRO_LSM330 is not set
+#CONFIG_LIGHT_DEVICE is not set
+#CONFIG_LS_CM3217 is not set
+#CONFIG_LS_CM3218 is not set
+#CONFIG_LS_STK3410 is not set
+#CONFIG_PROXIMITY_DEVICE is not set
+#CONFIG_PS_STK3410 is not set
+#CONFIG_HALL_DEVICE is not set
+#CONFIG_HS_MH248 is not setCONFIG_INPUT_MISC=yCONFIG_INPUT_UINPUT=yCONFIG_INPUT_RK805_PWRKEY=y
@@ -511,9 +511,9 @@ CONFIG_HW_RANDOM_ROCKCHIP=yCONFIG_I2C_CHARDEV=yCONFIG_I2C_GPIO=yCONFIG_I2C_RK3X=y# SPI PX30 EVB板没有使用，所以去掉
-CONFIG_SPI=y
-CONFIG_SPI_ROCKCHIP=y
-CONFIG_SPI_SPIDEV=y
+# CONFIG_SPI is not set
+# CONFIG_SPI_ROCKCHIP is not set
+# CONFIG_SPI_SPIDEV is not setCONFIG_PINCTRL_RK805=yCONFIG_GPIO_SYSFS=yCONFIG_POWER_AVS=y
@@ -521,12 +521,12 @@ CONFIG_ROCKCHIP_IODOMAIN=yCONFIG_POWER_RESET_GPIO=yCONFIG_SYSCON_REBOOT_MODE=yCONFIG_TEST_POWER=y# 充电部分，因为PX30没有带电池，所以去掉
-CONFIG_CHARGER_BQ25700=y
-CONFIG_BATTERY_CW2015=y
-CONFIG_BATTERY_RK817=y
-CONFIG_CHARGER_RK817=y
-CONFIG_BATTERY_RK818=y
-CONFIG_CHARGER_RK818=y
+#CONFIG_CHARGER_BQ25700 is not set
+#CONFIG_BATTERY_CW2015 is not set
+#CONFIG_BATTERY_RK817 is not set
+#CONFIG_CHARGER_RK817 is not set
+#CONFIG_BATTERY_RK818 is not set
+#CONFIG_CHARGER_RK818 is not setCONFIG_THERMAL=yCONFIG_THERMAL_WRITABLE_TRIPS=yCONFIG_THERMAL_DEFAULT_GOV_POWER_ALLOCATOR=y
@@ -536,26 +536,26 @@ CONFIG_THERMAL_GOV_USER_SPACE=yCONFIG_CPU_THERMAL=yCONFIG_DEVFREQ_THERMAL=yCONFIG_ROCKCHIP_THERMAL=y# 根据实际芯片进行配置，这里只要配置PX30/RK3326
-CONFIG_RK3368_THERMAL=y
+#CONFIG_RK3368_THERMAL is not setCONFIG_WATCHDOG=yCONFIG_DW_WATCHDOG=y
-CONFIG_MFD_RK618=y
-CONFIG_MFD_RK628=y
-CONFIG_MFD_RK630_I2C=y
+#CONFIG_MFD_RK618 is not set
+#CONFIG_MFD_RK628 is not set
+#CONFIG_MFD_RK630_I2C is not setCONFIG_MFD_RK808=y# fusb根据实际需要配置，PX30开发板上面没有所以去掉
-CONFIG_FUSB_30X=y
+#CONFIG_FUSB_30X is not setCONFIG_REGULATOR=yCONFIG_REGULATOR_FIXED_VOLTAGE=y# REGULATOR配置，根据实际需要配置，PX30开发板使用的是RK809，去掉其他不需要的
-CONFIG_REGULATOR_ACT8865=y
-CONFIG_REGULATOR_FAN53555=y
+#CONFIG_REGULATOR_ACT8865=y
+#CONFIG_REGULATOR_FAN53555=yCONFIG_REGULATOR_GPIO=y
-CONFIG_REGULATOR_LP8752=y
-CONFIG_REGULATOR_MP8865=y
+#CONFIG_REGULATOR_LP8752=y
+#CONFIG_REGULATOR_MP8865=yCONFIG_REGULATOR_PWM=yCONFIG_REGULATOR_RK808=y
-CONFIG_REGULATOR_TPS65132=y
-CONFIG_REGULATOR_XZ3216=y
-CONFIG_REGULATOR_DIO5632=y
+#CONFIG_REGULATOR_TPS65132=y
+#CONFIG_REGULATOR_XZ3216=y
+#CONFIG_REGULATOR_DIO5632=yCONFIG_MEDIA_SUPPORT=yCONFIG_MEDIA_CAMERA_SUPPORT=yCONFIG_MEDIA_CEC_SUPPORT=y
@@ -566,65 +566,65 @@ CONFIG_USB_VIDEO_CLASS=yCONFIG_V4L_PLATFORM_DRIVERS=yCONFIG_VIDEO_ROCKCHIP_CIF=yCONFIG_VIDEO_ROCKCHIP_ISP1=y
-CONFIG_VIDEO_ROCKCHIP_ISP=y
+#CONFIG_VIDEO_ROCKCHIP_ISP=y# CONFIG_MEDIA_SUBDRV_AUTOSELECT is not set# camera的sensor型号，根据实际需要进行配置，删掉不需要的配置
-CONFIG_VIDEO_DW9714=y
-CONFIG_VIDEO_VM149C=y
-CONFIG_VIDEO_TC35874X=y
-CONFIG_VIDEO_RK628_CSI=y
-CONFIG_VIDEO_LT6911UXC=y
-CONFIG_VIDEO_LT8619C=y
-CONFIG_VIDEO_OV2680=y
-CONFIG_VIDEO_OV5648=y
-CONFIG_VIDEO_OV5695=y
-CONFIG_VIDEO_OV8858=y
-CONFIG_VIDEO_OV13850=y
-CONFIG_VIDEO_GC0312=y
-CONFIG_VIDEO_GC032A=y
-CONFIG_VIDEO_GC2145=y
-CONFIG_VIDEO_GC2355=y
-CONFIG_VIDEO_GC2385=y
-CONFIG_VIDEO_GC4C33=y
-CONFIG_VIDEO_GC8034=y
-CONFIG_VIDEO_SGM3784=y
+#CONFIG_VIDEO_DW9714=y
+#CONFIG_VIDEO_VM149C=y
+#CONFIG_VIDEO_TC35874X=y
+#CONFIG_VIDEO_RK628_CSI=y
+#CONFIG_VIDEO_LT6911UXC=y
+#CONFIG_VIDEO_LT8619C=y
+#CONFIG_VIDEO_OV2680=y
+#CONFIG_VIDEO_OV5648=y
+#CONFIG_VIDEO_OV5695=y
+#CONFIG_VIDEO_OV8858=y
+#CONFIG_VIDEO_OV13850=y
+#CONFIG_VIDEO_GC0312=y
+#CONFIG_VIDEO_GC032A=y
+#CONFIG_VIDEO_GC2145=y
+#CONFIG_VIDEO_GC2355=y
+#CONFIG_VIDEO_GC2385=y
+#CONFIG_VIDEO_GC4C33=y
+#CONFIG_VIDEO_GC8034=y
+#CONFIG_VIDEO_SGM3784=y# CONFIG_VGA_ARB is not setCONFIG_DRM=yCONFIG_DRM_IGNORE_IOTCL_PERMIT=y# PX30/RK3326不支持DP和HDMI，所以去掉DP和HDMI相关的配置
-CONFIG_ROCKCHIP_ANALOGIX_DP=y
-CONFIG_ROCKCHIP_CDN_DP=y
-CONFIG_ROCKCHIP_DW_HDMI=y
+#CONFIG_ROCKCHIP_ANALOGIX_DP=y
+#CONFIG_ROCKCHIP_CDN_DP=y
+#CONFIG_ROCKCHIP_DW_HDMI=yCONFIG_ROCKCHIP_DW_MIPI_DSI=y
-CONFIG_ROCKCHIP_INNO_HDMI=y
+#CONFIG_ROCKCHIP_INNO_HDMI=yCONFIG_ROCKCHIP_LVDS=yCONFIG_ROCKCHIP_DRM_TVE=yCONFIG_ROCKCHIP_RGB=y
-CONFIG_DRM_ROCKCHIP_RK618=y
-CONFIG_DRM_ROCKCHIP_RK628=y
+#CONFIG_DRM_ROCKCHIP_RK618=y
+#CONFIG_DRM_ROCKCHIP_RK628=yCONFIG_DRM_PANEL_SIMPLE=y
-CONFIG_DRM_RK630_TVE=y
-CONFIG_DRM_RK1000_TVE=y
-CONFIG_DRM_SII902X=y
-CONFIG_DRM_DW_HDMI_I2S_AUDIO=y
-CONFIG_DRM_DW_HDMI_CEC=y
-CONFIG_MALI400=y
-CONFIG_MALI450=y
+#CONFIG_DRM_RK630_TVE=y
+#CONFIG_DRM_RK1000_TVE=y
+#CONFIG_DRM_SII902X=y
+#CONFIG_DRM_DW_HDMI_I2S_AUDIO=y
+#CONFIG_DRM_DW_HDMI_CEC=y# MALI配置，PX30/RK3326使用的是BIFROST的驱动，所以删掉其他的配置，MALI_MIDGARD是RK3399上面使用
-CONFIG_MALI400=y
-CONFIG_MALI450=y
+# CONFIG_MALI400 is not set
+# CONFIG_MALI450 is not set# CONFIG_MALI400_PROFILING is not setCONFIG_MALI_SHARED_INTERRUPTS=yCONFIG_MALI_DT=yCONFIG_MALI_DEVFREQ=y
-CONFIG_MALI_MIDGARD=y
+# CONFIG_MALI_MIDGARD is not setCONFIG_MALI_EXPERT=yCONFIG_MALI_PLATFORM_THIRDPARTY=yCONFIG_MALI_PLATFORM_THIRDPARTY_NAME="rk"
-CONFIG_MALI_DEBUG=y
+# CONFIG_MALI_DEBUG is not setCONFIG_MALI_PWRSOFT_765=yCONFIG_MALI_BIFROST=yCONFIG_MALI_BIFROST_DEVFREQ=yCONFIG_MALI_PLATFORM_NAME="rk"CONFIG_MALI_BIFROST_EXPERT=y
-CONFIG_MALI_BIFROST_DEBUG=y
+# CONFIG_MALI_BIFROST_DEBUG is not setCONFIG_BACKLIGHT_LCD_SUPPORT=y# CONFIG_LCD_CLASS_DEVICE is not setCONFIG_BACKLIGHT_CLASS_DEVICE=y
@@ -633,11 +633,11 @@ CONFIG_BACKLIGHT_PWM=yCONFIG_ROCKCHIP_MULTI_RGA=yCONFIG_IEP=yCONFIG_ROCKCHIP_MPP_SERVICE=y#PX30/RK3326上面没有VDPU1 RKVDEC  VEPU1，所以删掉
-CONFIG_ROCKCHIP_MPP_RKVDEC=y
+# CONFIG_ROCKCHIP_MPP_RKVDEC is not setCONFIG_ROCKCHIP_MPP_RKVDEC2=yCONFIG_ROCKCHIP_MPP_RKVENC=y
-CONFIG_ROCKCHIP_MPP_VDPU1=y
-CONFIG_ROCKCHIP_MPP_VEPU1=y
+# CONFIG_ROCKCHIP_MPP_VDPU1 is not set
+# CONFIG_ROCKCHIP_MPP_VEPU1 is not setCONFIG_ROCKCHIP_MPP_VDPU2=yCONFIG_ROCKCHIP_MPP_VEPU2=yCONFIG_ROCKCHIP_MPP_IEP2=y
@@ -657,21 +657,21 @@ CONFIG_SND_SOC_ROCKCHIP_I2S_TDM=yCONFIG_SND_SOC_ROCKCHIP_PDM=yCONFIG_SND_SOC_ROCKCHIP_SPDIF=yCONFIG_SND_SOC_ROCKCHIP_MULTICODECS=y# 声卡的配置，根据需要进行配置，删除多余的配置
-CONFIG_SND_SOC_ROCKCHIP_RT5651=y
+#CONFIG_SND_SOC_ROCKCHIP_RT5651 is not setCONFIG_SND_SOC_ROCKCHIP_HDMI=yCONFIG_SND_SOC_BT_SCO=y
-CONFIG_SND_SOC_CX2072X=y
+#CONFIG_SND_SOC_CX2072X is not setCONFIG_SND_SOC_DUMMY_CODEC=y
-CONFIG_SND_SOC_ES7202=y
-CONFIG_SND_SOC_ES7210=y
-CONFIG_SND_SOC_ES7243E=y
-CONFIG_SND_SOC_ES8311=y
-CONFIG_SND_SOC_ES8316=y
-CONFIG_SND_SOC_ES8396=y
-CONFIG_SND_SOC_RK3328=y
+#CONFIG_SND_SOC_ES7202 is not set
+#CONFIG_SND_SOC_ES7210 is not set
+#CONFIG_SND_SOC_ES7243E is not set
+#CONFIG_SND_SOC_ES8311 is not set
+#CONFIG_SND_SOC_ES8316 is not set
+#CONFIG_SND_SOC_ES8396 is not set
+#CONFIG_SND_SOC_RK3328 is not setCONFIG_SND_SOC_RK817=yCONFIG_SND_SOC_RK_CODEC_DIGITAL=y
-CONFIG_SND_SOC_RT5640=y
+#CONFIG_SND_SOC_RT5640 is not setCONFIG_SND_SOC_SPDIF=yCONFIG_SND_SIMPLE_CARD=yCONFIG_HIDRAW=y
#PX30/RK3326不支持USB3.0，所以可以删掉USB3.0相关配置CONFIG_USB_MON=y
-CONFIG_USB_XHCI_HCD=y
+#CONFIG_USB_XHCI_HCD=yCONFIG_USB_EHCI_HCD=yCONFIG_USB_EHCI_HCD_PLATFORM=yCONFIG_USB_OHCI_HCD=y# CONFIG_USB_OHCI_HCD_PCI is not setCONFIG_USB_OHCI_HCD_PLATFORM=yCONFIG_USB_PRINTER=yCONFIG_USB_STORAGE=yCONFIG_USB_STORAGE_DATAFAB=y
@@ -767,7 +767,7 @@ CONFIG_USB_STORAGE_KARMA=yCONFIG_USB_STORAGE_CYPRESS_ATACB=yCONFIG_USB_STORAGE_ENE_UB6250=yCONFIG_USB_UAS=y
-CONFIG_USB_DWC3=y
+#CONFIG_USB_DWC3=yCONFIG_USB_DWC2=yCONFIG_USB_SERIAL=yCONFIG_USB_SERIAL_GENERIC=y
@@ -778,9 +778,9 @@ CONFIG_USB_GADGET_DEBUG_FILES=yCONFIG_USB_GADGET_VBUS_DRAW=500CONFIG_USB_CONFIGFS=yCONFIG_USB_CONFIGFS_UEVENT=yCONFIG_USB_CONFIGFS_F_FS=yCONFIG_USB_CONFIGFS_F_ACC=yCONFIG_USB_CONFIGFS_F_AUDIO_SRC=y
# PX30 EVB板子没有使用LED灯，所以去掉相关配置
@@ -796,13 +796,13 @@ CONFIG_MMC_SDHCI_OF_ARASAN=yCONFIG_MMC_SDHCI_OF_DWCMSHC=yCONFIG_MMC_DW=yCONFIG_MMC_DW_ROCKCHIP=y
-CONFIG_LEDS_CLASS_FLASH=y
-CONFIG_LEDS_GPIO=y
-CONFIG_LEDS_RGB13H=y
-CONFIG_LEDS_TRIGGER_TIMER=y
-CONFIG_LEDS_TRIGGER_HEARTBEAT=y
-CONFIG_LEDS_TRIGGER_BACKLIGHT=y
-CONFIG_LEDS_TRIGGER_DEFAULT_ON=y
+#CONFIG_LEDS_CLASS_FLASH=y
+#CONFIG_LEDS_GPIO=y
+#CONFIG_LEDS_RGB13H=y
+#CONFIG_LEDS_TRIGGER_TIMER=y
+#CONFIG_LEDS_TRIGGER_HEARTBEAT=y
+#CONFIG_LEDS_TRIGGER_BACKLIGHT=y
+#CONFIG_LEDS_TRIGGER_DEFAULT_ON=yCONFIG_RTC_CLASS=yCONFIG_RTC_DRV_RK808=yCONFIG_DMADEVICES=y# 芯片相关配置，根据实际芯片进行配置，这里只配置PX30，PX30和RK3326同一个配置
@@ -826,14 +826,14 @@ CONFIG_COMMON_CLK_SCMI=y# CONFIG_COMMON_CLK_XGENE is not setCONFIG_COMMON_CLK_PWM=yCONFIG_MAILBOX=y
-CONFIG_RK3368_MBOX=y
-CONFIG_RK3368_SCPI_PROTOCOL=y
+#CONFIG_RK3368_MBOX=y
+#CONFIG_RK3368_SCPI_PROTOCOL=yCONFIG_ROCKCHIP_IOMMU=yCONFIG_CPU_PX30=y
-CONFIG_CPU_RK3328=y
-CONFIG_CPU_RK3368=y
-CONFIG_CPU_RK3399=y
-CONFIG_CPU_RK3568=y
+#CONFIG_CPU_RK3328=y
+#CONFIG_CPU_RK3368=y
+#CONFIG_CPU_RK3399=y
+#CONFIG_CPU_RK3568=yCONFIG_ANDROID_VERSION=0x08000000CONFIG_ROCKCHIP_PM_DOMAINS=yCONFIG_ROCKCHIP_PVTM=y#删除PX30和RK3326没有使用的到USB3.0和HDMI及PCIE的配置
@@ -857,16 +857,16 @@ CONFIG_PWM=yCONFIG_PWM_ROCKCHIP=yCONFIG_PHY_ROCKCHIP_CSI2_DPHY=yCONFIG_PHY_ROCKCHIP_EMMC=y
-CONFIG_PHY_ROCKCHIP_INNO_HDMI_PHY=y
+#CONFIG_PHY_ROCKCHIP_INNO_HDMI_PHY=yCONFIG_PHY_ROCKCHIP_INNO_MIPI_DPHY=yCONFIG_PHY_ROCKCHIP_INNO_USB2=y
-CONFIG_PHY_ROCKCHIP_INNO_USB3=y
+#CONFIG_PHY_ROCKCHIP_INNO_USB3=yCONFIG_PHY_ROCKCHIP_INNO_VIDEO_COMBO_PHY=yCONFIG_PHY_ROCKCHIP_NANENG_COMBO_PHY=yCONFIG_PHY_ROCKCHIP_NANENG_EDP=y
-CONFIG_PHY_ROCKCHIP_PCIE=y
+#CONFIG_PHY_ROCKCHIP_PCIE=yCONFIG_PHY_ROCKCHIP_SNPS_PCIE3=y
-CONFIG_PHY_ROCKCHIP_TYPEC=y
+#CONFIG_PHY_ROCKCHIP_TYPEC=yCONFIG_PHY_ROCKCHIP_USB=yCONFIG_ANDROID=yCONFIG_ANDROID_BINDER_IPC=y@@ -874,7 +874,7 @@ CONFIG_ROCKCHIP_EFUSE=yCONFIG_ROCKCHIP_OTP=yCONFIG_TEE=yCONFIG_OPTEE=y# NAND FLASH配置，根据需要进行配置，RK3566 EVB是用eMMC，所以删掉nand配置
-CONFIG_RK_NAND=y
+# CONFIG_RK_NAND is not setCONFIG_RK_HEADSET=yCONFIG_ROCKCHIP_RKNPU=yCONFIG_EXT4_FS=y
#去掉debug相关配置，在量产的时候可以去掉，开发的时候建议保留
@@ -930,8 +930,8 @@ CONFIG_CRYPTO_ANSI_CPRNG=yCONFIG_CRYPTO_DEV_ROCKCHIP=yCONFIG_CRYPTO_DEV_ROCKCHIP_DEV=yCONFIG_PRINTK_TIME=y
-CONFIG_DEBUG_INFO=y
-CONFIG_DEBUG_FS=y
+# CONFIG_DEBUG_INFO is not set
+# CONFIG_DEBUG_FS is not setCONFIG_MAGIC_SYSRQ=yCONFIG_SOFTLOCKUP_DETECTOR=yCONFIG_DEFAULT_HUNG_TASK_TIMEOUT=10
@@ -939,5 +939,5 @@ CONFIG_PANIC_TIMEOUT=5CONFIG_SCHEDSTATS=yCONFIG_SCHED_STACK_END_CHECK=y# CONFIG_DEBUG_PREEMPT is not set
-CONFIG_ENABLE_DEFAULT_TRACERS=y
-CONFIG_BUG_ON_DATA_CORRUPTION=y
+# CONFIG_ENABLE_DEFAULT_TRACERS is not set
+# CONFIG_BUG_ON_DATA_CORRUPTION=y is not set

关掉串口log打印

关掉串口log打印可以再优化1-2s的开机时间，具体操作方法可以操作下面链接
如何关掉串口log打印

Rockchip 平台APK的裁剪

Android11的代码中可以在vendor/rockchip/common/apps/apps.mk中去掉不需要的apk，可以根据需求进行删减，这里面的apk都是可以删减的。
Android12对应的mk文件在device/rockchip/common/modules/rockchip_apps.mk中指定RK的app。

Rockchip其他新芯片平台的优化

Rockchip RK356X Android平台内存优化及系统裁剪

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