Genio500 Android13 Camera移植經驗分享

Camera現在是使用比較廣泛的外設，現在基於：MT8385，Android版本：Android12，內核版本：kernel-4.19來實現移植ov13855。

1. MiPi 硬體引腳配置,配置路徑：

vendor\mediatek\proprietary\custom\tb8788p1_64_wifi_k419\hal\imgsensor_src\cfg_setting_imgsensor.cpp

static CUSTOM_CFG gCustomCfg[] = {
    {
        .sensorIdx     = IMGSENSOR_SENSOR_IDX_MAIN,
        .mclk          = CUSTOM_CFG_MCLK_2,
        .port          = CUSTOM_CFG_CSI_PORT_1,
        .dir           = CUSTOM_CFG_DIR_REAR,
        .bitOrder      = CUSTOM_CFG_BITORDER_9_2,
        .orientation   = 90,
        .horizontalFov = 67,
        .verticalFov   = 49
    },
    {
        .sensorIdx     = IMGSENSOR_SENSOR_IDX_SUB,
        .mclk          = CUSTOM_CFG_MCLK_3,
        .port          = CUSTOM_CFG_CSI_PORT_2,
        .dir           = CUSTOM_CFG_DIR_FRONT,
        .bitOrder      = CUSTOM_CFG_BITORDER_9_2,
        .orientation   = 270,
        .horizontalFov = 63,
        .verticalFov   = 40
    },

2.配置mclk上電時序

kernel-4.19/drivers/misc/mediatek/imgsensor/src/mt6771/camera_project/tb8788p1_64_wifi_k419/camera_hw/imgsensor_cfg_table.c

struct IMGSENSOR_HW_CFG imgsensor_custom_config[] = {
	{
		IMGSENSOR_SENSOR_IDX_MAIN,
		IMGSENSOR_I2C_DEV_0,
		{
			{IMGSENSOR_HW_PIN_MCLK,  IMGSENSOR_HW_ID_MCLK},
			{IMGSENSOR_HW_PIN_AVDD,  IMGSENSOR_HW_ID_REGULATOR},

{IMGSENSOR_HW_PIN_DOVDD, IMGSENSOR_HW_ID_REGULATOR},
{IMGSENSOR_HW_PIN_DVDD, IMGSENSOR_HW_ID_REGULATOR},
{IMGSENSOR_HW_PIN_PDN, IMGSENSOR_HW_ID_GPIO},
{IMGSENSOR_HW_PIN_RST, IMGSENSOR_HW_ID_GPIO},
{IMGSENSOR_HW_PIN_NONE, IMGSENSOR_HW_ID_NONE},
},
},
{
IMGSENSOR_SENSOR_IDX_SUB,
IMGSENSOR_I2C_DEV_1,
{
{IMGSENSOR_HW_PIN_MCLK, IMGSENSOR_HW_ID_MCLK},
{IMGSENSOR_HW_PIN_AVDD, IMGSENSOR_HW_ID_REGULATOR},
{IMGSENSOR_HW_PIN_DOVDD, IMGSENSOR_HW_ID_REGULATOR},
{IMGSENSOR_HW_PIN_DVDD, IMGSENSOR_HW_ID_REGULATOR},
{IMGSENSOR_HW_PIN_PDN, IMGSENSOR_HW_ID_GPIO},
{IMGSENSOR_HW_PIN_RST, IMGSENSOR_HW_ID_GPIO},
{IMGSENSOR_HW_PIN_NONE, IMGSENSOR_HW_ID_NONE},
},
},



#if defined(OV13855_MIPI_RAW)
{
SENSOR_DRVNAME_OV13855_MIPI_RAW,
{
{SensorMCLK, Vol_High, 0},
{PDN, Vol_Low, 0},
{RST, Vol_Low, 0},
{DOVDD, Vol_1800, 1},
{AVDD, Vol_2800, 1},
{DVDD, Vol_1200, 5},
{AFVDD, Vol_2800, 1},
{PDN, Vol_High, 1},
{RST, Vol_High, 2}
},
},
#endif

3.driver放置路徑：drivers/misc/mediatek/imgsensor/src/common/v1_1/imgsensor_sensor_list.c

#if defined(OV13855_MIPI_RAW)
{OV13855_SENSOR_ID, SENSOR_DRVNAME_OV13855_MIPI_RAW,OV13855_MIPI_RAW_SensorInit},
#endif

drivers/misc/mediatek/imgsensor/src/common/v1_1/imgsensor_sensor_list.h

UINT32 OV13855_MIPI_RAW_SensorInit(struct SENSOR_FUNCTION_STRUCT **pfFunc);

drivers/misc/mediatek/imgsensor/inc/kd_imgsensor.h

#define OV13855_SENSOR_ID                       0xD855

alps/device/mediateksample/tb8788p1_64_wifi_k419/ProjectConfig.mk

CUSTOM_HAL_IMGSENSOR = ov13855_mipi_raw

kernel-4.19\arch\arm64\configs\tb8788p1_64_wifi_k419_debug_defconfig

CONFIG_CUSTOM_KERNEL_IMGSENSOR="ov13855_mipi_raw"

以上就是Camera在kernel4.19上的移植步驟，具體的可以參考MTK_MT8385_Legacy_Camera_Sensor_Driver_Porting_User_Guide_v1.4。