高通Camera移植文檔
此文檔以在高通8916平臺移植OV5648爲例，藍色字體爲註釋，紅色字體爲重要點。
一、Kernel 部分
1.1 添加Device Tree代碼：
代碼路徑：srcLINUXandroidkernelarcharmbootdtsqcom
文件名：msm8916-camera-sensor-qrd-skui.dtsi
需添加的代碼：
qcom,camera@6a {
——這需要與1.3節中添加的Clock地址向對應。
compatible = "ovti,ov5648";
——這要與1.5節中添加的驅動代碼中的名字相對應，即：static const struct of_device_id ov5648_dt_match[] = {
{
.compatible = "ovti,ov5648",
.data = &ov5648_s_ctrl
},
reg = <0x6a 0x0>;
——這需要與1.3節中添加的Clock地址向對應。
qcom,slave-id = <0x6c 0x300a 0x5648>;
——0x6c爲攝像頭的I2C地址，0x300a爲攝像頭存放ID的寄存器地址，0x5648爲攝像頭的ID，這都需要查看datasheet或直接問模組廠。
qcom,csiphy-sd-index = <1>;
qcom,csid-sd-index = <1>;
——以上兩個設置需要查看主板原理圖，看主板上攝像頭是接在CSI0還是CSI1上的，一般後攝像頭都會接到CSI0上，前攝像頭會接在CSI1上。
qcom,mount-angle = <270>;
——該參數爲攝像頭預覽界面的方向，如果預覽方向有被旋轉，可以通過修改這個參數進行修正。
qcom,sensor-name = "ov5648_oty5f03";
——這個對應vendor中lib文件夾的文件名，具體可參看2.2節。
cam_vdig-supply = <&pm8916_l2>;
cam_vana-supply = <&pm8916_l17>;
cam_vio-supply = <&pm8916_l6>;
——以上三個參數分別對應DVDD（vdig）、AVDD（vana）、DOVDD（vio）三個電壓，具體所接的是哪路電壓，需要參看主板原理圖。
qcom,cam-vreg-name = "cam_vdig", "cam_vio", "cam_vana";
qcom,cam-vreg-type = <0 1 0>;
qcom,cam-vreg-min-voltage = <1200000 0 2850000>;
qcom,cam-vreg-max-voltage = <1200000 0 2850000>;
qcom,cam-vreg-op-mode = <200000 0 80000>;
——這五個配置要分別與上面的三個電壓一一對應（按照從上到下的順序），如果有對焦馬達的還要在後面填一路AF的電壓，如下所示：
cam_vaf-supply = <&pm8916_l10>;
qcom,cam-vreg-name = "cam_vdig", "cam_vio", "cam_vana",
"cam_vaf";
qcom,cam-vreg-type = <0 1 0 0>;
qcom,cam-vreg-min-voltage = <1200000 0 2850000 2800000>;
qcom,cam-vreg-max-voltage = <1200000 0 2850000 2800000>;
qcom,cam-vreg-op-mode = <200000 0 80000 100000>;
pinctrl-names = "cam_default", "cam_suspend";
pinctrl-0 = <&cam_sensor_mclk1_default
&cam_sensor_front_default>;
pinctrl-1 = <&cam_sensor_mclk1_sleep &cam_sensor_front_sleep>;
——以上這兩個需要區分的就是前後攝像頭的配置不一樣，上面這種配置是前攝像頭的配置，後攝像頭的配置如下所示：
pinctrl-names = "cam_default", "cam_suspend";
pinctrl-0 = <&cam_sensor_mclk0_default
&cam_sensor_rear_default>;
pinctrl-1 = <&cam_sensor_mclk0_sleep &cam_sensor_rear_sleep>;
gpios = <&msm_gpio 27 0>,
<&msm_gpio 28 0>,
<&msm_gpio 33 0>,
<&msm_gpio 119 0>;
qcom,gpio-reset = <1>;
qcom,gpio-standby = <2>;
qcom,gpio-vana = <3>;
qcom,gpio-req-tbl-num = <0 1 2 3>;
qcom,gpio-req-tbl-flags = <1 0 0 0>;
qcom,gpio-req-tbl-label = "CAMIF_MCLK",
"CAM_RESET",
"CAM_STANDBY",
"CAM_VANA";
——上面這部分主要是配置GPIO口，這裏需要注意的是gpios的數組要與gpio-req-tbl-label的名字一一對應，即gpio 27對應CAMIF_MCLK，而reset 、standby 、vana 分別對應gpios數組中的第1、2、3參數，gpio-req-tbl-num也對應於gpios中數組的標號。
qcom,gpio-set-tbl-num = <1 1>;
qcom,gpio-set-tbl-flags = <0 2>;
qcom,gpio-set-tbl-delay = <1000 4000>;
——這三個參數是前攝像頭的固定模式，後攝像頭不需要這個設置，在配置後攝像頭時直接去掉即可。
qcom,csi-lane-assign = <0x4320>;
——該參數爲主芯片mipi Lane個數配置寄存器。
qcom,csi-lane-mask = <0x3>;
——該參數爲配置mipi Lane個數，0x3爲1組數據線加1組時鐘線，0x07爲2組數據線加1組時鐘線，0x1f爲4組數據線加1主時鐘線。
qcom,sensor-position = <1>;
——該參數，如果添加的是前攝像頭需要配置成1，如果是後攝像頭需要配置成0
qcom,sensor-mode = <1>;
qcom,cci-master = <0>;
status = "ok";
clocks = <&clock_gcc clk_mclk1_clk_src>,
<&clock_gcc clk_gcc_camss_mclk1_clk>;
clock-names = "cam_src_clk", "cam_clk";
——上面兩個Clocks和Clock-names是前攝像頭的配置，後攝像頭的配置如下：
clocks = <&clock_gcc clk_mclk0_clk_src>,
<&clock_gcc clk_gcc_camss_mclk0_clk>;
clock-names = "cam_src_clk", "cam_clk";
};
另外如果有對焦馬達還需要修改對焦馬達的地址，如下所示：
actuator0: qcom,actuator@6e {
cell-index = <3>;
reg = <0x18>;
compatible = "qcom,actuator";
qcom,cci-master = <0>;
};
1.2 添加宏開關：
代碼路徑：srcLINUXandroidkernelarcharmconfigs
文件名：msm8916_defconfig 和msm8916-perf_defconfig
需添加的代碼：
CONFIG_OV5648=y
1.3 添加Clock：
代碼路徑：srcLINUXandroidkernelarcharmmach-msm
文件名：clock-8226.c
需添加的代碼：
/* MM sensor clocks */
CLK_LOOKUP("cam_src_clk", mclk0_clk_src.c, "6f.qcom,camera"),
CLK_LOOKUP("cam_src_clk", mclk1_clk_src.c, "90.qcom,camera"),
CLK_LOOKUP("cam_src_clk", mclk0_clk_src.c, "6d.qcom,camera"),
CLK_LOOKUP("cam_src_clk", mclk0_clk_src.c, "6a.qcom,camera"),
CLK_LOOKUP("cam_src_clk", mclk0_clk_src.c, "6c.qcom,camera"),
CLK_LOOKUP("cam_src_clk", mclk0_clk_src.c, "20.qcom,camera"),
CLK_LOOKUP("cam_src_clk", mclk0_clk_src.c, "78.qcom,camera"),
CLK_LOOKUP("cam_clk", camss_mclk0_clk.c, "6f.qcom,camera"),
CLK_LOOKUP("cam_clk", camss_mclk1_clk.c, "90.qcom,camera"),
CLK_LOOKUP("cam_clk", camss_mclk0_clk.c, "6d.qcom,camera"),
CLK_LOOKUP("cam_clk", camss_mclk0_clk.c, "6a.qcom,camera"),
CLK_LOOKUP("cam_clk", camss_mclk0_clk.c, "6c.qcom,camera"),
CLK_LOOKUP("cam_clk", camss_mclk0_clk.c, "78.qcom,camera"),
CLK_LOOKUP("cam_clk", camss_mclk0_clk.c, "20.qcom,camera"),
CLK_LOOKUP("cam_src_clk", mclk0_clk_src.c, "62.qcom,camera"),
CLK_LOOKUP("cam_clk", camss_mclk0_clk.c, "62.qcom,camera"),
CLK_LOOKUP("cam_src_clk", mclk0_clk_src.c, "0.qcom,camera"),
CLK_LOOKUP("cam_src_clk", mclk0_clk_src.c, "1.qcom,camera"),
CLK_LOOKUP("cam_clk", camss_mclk0_clk.c, "0.qcom,camera"),
CLK_LOOKUP("cam_clk", camss_mclk0_clk.c, "1.qcom,camera"),
需要注意的是這裏的標示（如：6a）不能重複，並且添加的時候需要同時添加一組代碼，即上面紅色標示的地方。
1.4 Kconfig和Makefile文件中添加對應IC代碼：
代碼路徑：srcLINUXandroidkerneldriversmediaplatformmsmcamera_v2（Kconfig路徑），srcLINUXandroidkerneldriversmediaplatformmsmcamera_v2sensor（Makefile路徑）
文件名：Kconfig和Makefile
需添加的代碼：
添加Kconfig：
config OV5648
bool "Sensor OV5648 (BAYER 5M)"
depends on MSMB_CAMERA
---help---
OmniVision 5 MP Bayer Sensor, only use 1 mipi lane,
preview set to 1296*972 at 30 fps,
snapshot set to 2592*1944 at 12 fps,
This sensor driver does not support auto focus.
添加Makefile：
obj-$(CONFIG_OV5648) += ov5648.o
1.5 添加Camera驅動代碼：
代碼路徑：srcLINUXandroidkerneldriversmediaplatformmsmcamera_v2sensor
文件名：ov5648.c
需添加的代碼：
該部分主要要注意電源的設置，它包括傳感器電源信息，IO控制和Mclk。通常情況下，無需修改該部分內容，因爲大部分配置已在設備樹文件中完成；但可以修改.delay = 0 字段來和時間匹配。
static struct msm_sensor_power_setting ov5648_power_setting[] = {
{
.seq_type = SENSOR_VREG,
.seq_val = CAM_VIO,
.config_val = 0,
.delay = 0,
},
{
.seq_type = SENSOR_VREG,
.seq_val = CAM_VAF,
.config_val = 0,
.delay = 5,
},
{
.seq_type = SENSOR_GPIO,
.seq_val = SENSOR_GPIO_VDIG,
.config_val = GPIO_OUT_LOW,
.delay = 5,
},
{
.seq_type = SENSOR_GPIO,
.seq_val = SENSOR_GPIO_VDIG,
.config_val = GPIO_OUT_HIGH,
.delay = 5,
},
{
.seq_type = SENSOR_GPIO,
.seq_val = SENSOR_GPIO_VANA,
.config_val = GPIO_OUT_HIGH,
.delay = 5,
},
{
.seq_type = SENSOR_GPIO,
.seq_val = SENSOR_GPIO_STANDBY,
.config_val = GPIO_OUT_LOW,
.delay = 5,
},
{
.seq_type = SENSOR_GPIO,
.seq_val = SENSOR_GPIO_STANDBY,
.config_val = GPIO_OUT_HIGH,
.delay = 10,
},
{
.seq_type = SENSOR_GPIO,
.seq_val = SENSOR_GPIO_RESET,
.config_val = GPIO_OUT_LOW,
.delay = 5,
},
{
.seq_type = SENSOR_GPIO,
.seq_val = SENSOR_GPIO_RESET,
.config_val = GPIO_OUT_HIGH,
.delay = 10,
},
{
.seq_type = SENSOR_CLK,
.seq_val = SENSOR_CAM_MCLK,
.config_val = 23880000,
.delay = 10,
},
{
.seq_type = SENSOR_I2C_MUX,
.seq_val = 0,
.config_val = 0,
.delay = 0,
},
};
static struct msm_sensor_power_setting ov5648_power_down_setting[] = {
{
.seq_type = SENSOR_VREG,
.seq_val = CAM_VIO,
.config_val = 0,
.delay = 0,
},
{
.seq_type = SENSOR_VREG,
.seq_val = CAM_VAF,
.config_val = 0,
.delay = 5,
},
{
.seq_type = SENSOR_GPIO,
.seq_val = SENSOR_GPIO_VANA,
.config_val = GPIO_OUT_LOW,
.delay = 5,
},
{
.seq_type = SENSOR_GPIO,
.seq_val = SENSOR_GPIO_STANDBY,
.config_val = GPIO_OUT_LOW,
.delay = 5,
},
{
.seq_type = SENSOR_GPIO,
.seq_val = SENSOR_GPIO_RESET,
.config_val = GPIO_OUT_LOW,
.delay = 10,
},
{
.seq_type = SENSOR_CLK,
.seq_val = SENSOR_CAM_MCLK,
.config_val = 23880000,
.delay = 10,
},
{
.seq_type = SENSOR_I2C_MUX,
.seq_val = 0,
.config_val = 0,
.delay = 0,
},
};
二、Vendor部分
2.1 在Makefile文件中添加IC代碼：
代碼路徑：srcLINUXandroidvendorqcomproprietarycommonconfig
文件名：device-vendor.mk
需添加的代碼：
MM_CAMERA += libchromatix_ov5648_oty5f03_common
MM_CAMERA += libchromatix_ov5648_oty5f03_default_video
MM_CAMERA += libchromatix_ov5648_oty5f03_preview
MM_CAMERA += libchromatix_ov5648_oty5f03_snapshot
MM_CAMERA += libchromatix_ov5648_oty5f03_zsl
MM_CAMERA += libmmcamera_ov5648_oty5f03
注意：如果這裏沒有添加以上代碼，在編譯的時候就不會生成相應的so文件。這so文件可以在srcLINUXandroidouttargetproductmsm8916_32systemvendorlib目錄下找到，如下所示:
libchromatix_ov5648_oty5f03_common.so
libchromatix_ov5648_oty5f03_default_video.so
libchromatix_ov5648_oty5f03_preview.so
libchromatix_ov5648_oty5f03_snapshot.so
libchromatix_ov5648_oty5f03_zsl.so
libmmcamera_ov5648_oty5f03.so
2.2 添加Lib驅動代碼：
代碼路徑：
srcLINUXandroidvendorqcomproprietarymm-cameramm-camera2media-controllermodulessensorssensor_libs
文件夾名：ov5648_oty5f03
需添加的代碼：
2.2.1 移植相機接口配置
這部分內容定義了傳感器接口配置，包括 I2C和 MIPI。請確認設置不會和 dtsi文件中的類似內容衝突。
static struct msm_camera_sensor_slave_info sensor_slave_info = {
/* Camera slot where this camera is mounted */
.camera_id = CAMERA_0,
/* sensor slave address */
.slave_addr = 0x6c,
/* sensor address type */
.addr_type = MSM_CAMERA_I2C_WORD_ADDR,
/* sensor id info*/
.sensor_id_info = {
/* sensor id register address */
.sensor_id_reg_addr = 0x300a,
/* sensor id */
.sensor_id = 0x5648,
},
/* power up / down setting */
.power_setting_array = {
.power_setting = ov5648_oty5f03_power_setting,
.size = ARRAY_SIZE(ov5648_oty5f03_power_setting),
.power_down_setting = ov5648_oty5f03_power_down_setting,
.size_down = ARRAY_SIZE(ov5648_oty5f03_power_down_setting),
},
};
static sensor_output_t sensor_output = {
.output_format = SENSOR_BAYER,
.connection_mode = SENSOR_MIPI_CSI,
.raw_output = SENSOR_10_BIT_DIRECT,
};
#ifndef VFE_40
static struct csi_lane_params_t csi_lane_params = {
.csi_lane_assign = 0xE4,
.csi_lane_mask = 0x3,
.csi_if = 1,
.csid_core = {0},
.csi_phy_sel = 0,
};
#else
static struct csi_lane_params_t csi_lane_params = {
.csi_lane_assign = 0x4320,
.csi_lane_mask = 0x3,
.csi_if = 1,
.csid_core = {0},
.csi_phy_sel = 1,
};
#endif
2.2.2 移植傳感器輸出配置
這部分內容介紹了傳感器不同模式的配置和設置，包含各模式的 I2C 寄存器設備、CSI參數、crop參數、傳感器輸出信息和chormatix數組。這些配置的數組大小應和傳感器支持的模式種類相同。
static struct msm_camera_i2c_reg_setting res_settings[] = {
{
.reg_setting = res0_reg_array,
.size = ARRAY_SIZE(res0_reg_array),
.addr_type = MSM_CAMERA_I2C_WORD_ADDR,
.data_type = MSM_CAMERA_I2C_BYTE_DATA,
.delay = 0,
},
{
.reg_setting = res1_reg_array,
.size = ARRAY_SIZE(res1_reg_array),
.addr_type = MSM_CAMERA_I2C_WORD_ADDR,
.data_type = MSM_CAMERA_I2C_BYTE_DATA,
.delay = 0,
},
};
……
static struct msm_camera_csi2_params *csi_params[] = {
&ov5648_oty5f03_csi_params, /* RES 0*/
&ov5648_oty5f03_csi_params, /* RES 1*/
};
……
static struct sensor_crop_parms_t crop_params[] = {
{0, 0, 0, 0}, /* RES 0 */
{0, 0, 0, 0}, /* RES 1 */
};
……
static struct sensor_lib_out_info_t sensor_out_info[] = {
{
.x_output = 2592,
.y_output = 1944,
.line_length_pclk = 2816,
.frame_length_lines = 2380,
.vt_pixel_clk = 84000000,
.op_pixel_clk = 84000000,
.binning_factor = 1,
.max_fps = 12.5,
.min_fps = 7.5,
.mode = SENSOR_DEFAULT_MODE,
},
{
.x_output = 1296,
.y_output = 972,
.line_length_pclk = 1408,
.frame_length_lines = 992,
.vt_pixel_clk = 42000000,
.op_pixel_clk = 42000000,
.binning_factor = 1,
.max_fps = 30.0,
.min_fps = 7.5,
.mode = SENSOR_DEFAULT_MODE,
},
};
……
static struct sensor_lib_chromatix_t ov5648_oty5f03_chromatix[] = {
{
.common_chromatix = OV5648_OTY5F03_LOAD_CHROMATIX(common),
.camera_preview_chromatix = OV5648_OTY5F03_LOAD_CHROMATIX(snapshot), /* RES0 */
.camera_snapshot_chromatix = OV5648_OTY5F03_LOAD_CHROMATIX(snapshot), /* RES0 */
.camcorder_chromatix = OV5648_OTY5F03_LOAD_CHROMATIX(default_video), /* RES0 */
},
{
.common_chromatix = OV5648_OTY5F03_LOAD_CHROMATIX(common),
.camera_preview_chromatix = OV5648_OTY5F03_LOAD_CHROMATIX(preview), /* RES2 */
.camera_snapshot_chromatix = OV5648_OTY5F03_LOAD_CHROMATIX(preview), /* RES2 */
.camcorder_chromatix = OV5648_OTY5F03_LOAD_CHROMATIX(default_video), /* RES2 */
},
};
2.2.3 鏡頭信息移植
相機處理流程(比如曝光計算)需要鏡頭信息。因此，以下結構需添加正確的鏡頭信息。
static sensor_lens_info_t default_lens_info = {
.focal_length = 2.37,
.pix_size = 1.4,
.f_number = 2.4,
.total_f_dist = 1.97,
.hor_view_angle = 70.24,
.ver_view_angle = 52.68,
};
2.2.4 曝光配置移植
通常情況下，不同傳感器有不同的曝光控制方式。所以，當傳感器打開後，需移植曝光配置以成功調試傳感器的曝光控制。
包括以下函數：
n ov5648_real_to_register_gain – 將實際邏輯增益轉換爲寄存器值。
n ov5648_register_to_real_gain – 將寄存器值轉換成真實的邏輯增益。
n ov5648_calculate_exposure – 獲取曝光時間和增益的另一個曝光配置.
n ov5648_fill_exposure_array – 準備另一個曝光配置數組。
2.3 添加Chromatix文件：
代碼路徑：
srcLINUXandroidvendorqcomproprietarymm-cameramm-camera2media-controllermodulessensorschromatix0301libchromatix
文件夾名：chromatix_ov5648_oty5f03
需添加的代碼：
該部分主要是針對raw格式是攝像頭，而yuv格式的攝像頭不需要做該步驟，而這添加的內容主要是raw攝像頭效果參數的.h文件，這需要向模組或IC廠索要該部分的文件。