| 平台 | 内核版本 | 安卓版本 |
|---|---|---|
| PX3 | Linux3.1 | Android7.1 |
GM7150BN_BC是一款9位视频解码芯片，该芯片采用CMOS工艺，通过I2C总线与PC或DSP相连构成应用系统。芯片内部只包含一路模拟处理通道，能实现CVBS、S-Video视频信号源选择、A/D转换、自动钳位、自动增益控制（AGC）、时钟发生（CGC）、多制式解码、亮度/对比度/饱和度控制（BCS）。
改的目录：
内核目录下改动文件如下：
arch/arm/mach-rk30/board-rk3168-tb-camera.c
arch/arm/plat-rk/include/plat/rk_camera.h
drivers/media/video/Kconfig
drivers/media/video/Makefile
drivers/media/video/gm7150.c
drivers/media/video/gm7150.h
drivers/video/rockchip/vehicle/Makefile
drivers/video/rockchip/vehicle/vehicle_ad_gm7150.c
drivers/video/rockchip/vehicle/vehicle_ad_gm7150.h
.../rockchip/vehicle/vehicle_generic_sensor.c
include/media/v4l2-chip-ident.h
其中新增文件如下：
create mode 100644 drivers/media/video/gm7150.c
create mode 100644 drivers/media/video/gm7150.h
create mode 100644 drivers/video/rockchip/vehicle/vehicle_ad_gm7150.c
create mode 100644 drivers/video/rockchip/vehicle/vehicle_ad_gm7150.h
部分修改内容如下：
目录：arch/arm/mach-rk30/board-rk3168-tb-camera.c
注册一个 Camera Sensor 设备只需要在 board 文件static struct rkcamera_platform_data 类型的new_camera[] 中定义一个 Camera 设备即可。
static struct rkcamera_platform_data new_camera[] = {
...
+#ifdef CONFIG_SOC_CAMERA_GM7150
+ new_camera_device(RK29_CAM_SENSOR_GM7150,
+ back,
+ RK30_PIN0_PA6,
+ 0,
+ 3,//bit0:0 1 bit1:0 1 default:0
+ 3,
+ 0),
+#endif
new_camera_device(RK29_CAM_SENSOR_TVP5150,
back,
RK30_PIN0_PA6,
该函数原型如下：
new_camera_device(sensor_name,
face,
pwdn_io,
flash_attach,
mir,
i2c_chl,
cif_chl)
其中：
| face | Sensor 设备作为前置还是作为后置的配置；前置直接填写 front，后置直接填写 back |
| pwdn_io | Sensor 设 备 powerdown （ standby ） 连 接 GPIO 的 配 置 |
| flash_attach | 该 Sensor 设备是否连接 flash 闪光灯的配置 |
| Mir | 该 Sensor 设备的镜像配置 |
| i2c_chl | 该 Sensor 设备连接的 i2c 通道号配置 |
| cif_chl | cif的通道 |
其中mirde详细配置:
| bit0 | 0: mirror off | 1: mirror on |
| bit1 | 0: flip off | 1: flip on |
设备名字添加
Sensor设 备 名 字 ， 采 用arch/arm/plat-rk/include/plat/rk_camera.h
#define RK29_CAM_SENSOR_DM5150 dm5150
+#define RK29_CAM_SENSOR_GM7150 gm7150
#define dm5150_SENSOR_ORIENTATION 90
+#define gm7150_SENSOR_ORIENTATION 90
#define dm5150_FULL_RESOLUTION 0x30000 // 0.3 megapixel
+#define gm7150_FULL_RESOLUTION 0x30000 // 0.3 megapixel
#define dm5150_I2C_ADDR 0xba
+#define gm7150_I2C_ADDR 0xba
#define dm5150_PWRDN_ACTIVE 0x00
+#define gm7150_PWRDN_ACTIVE 0x00
#define dm5150_PWRSEQ sensor_PWRSEQ_DEFAULT
+#define gm7150_PWRSEQ sensor_PWRSEQ_DEFAULT
make kconfig 相关修改
接下来就是移植工作了：
目录：drivers/media/video/Kconfig
+
+config SOC_CAMERA_GM7150
+ tristate "gm7150 camera support for rockchip"
+ depends on SOC_CAMERA && I2C
+ help
+ This is a gm7150 camera driver for rockchip
目录：drivers/media/video/Makefile
`+obj-$(CONFIG_SOC_CAMERA_GM7150) += gm7150.o`
drivers/video/rockchip/vehicle/Makefile
`+obj-$(CONFIG_VIDEO_REVERSE_IMAGE) += vehicle_ad_gm7150.o`
文件目录：drivers/video/rockchip/vehicle/vehicle_generic_sensor.c
+#include "vehicle_ad_gm7150.h"
static struct vehicle_sensor_ops sensor_cb_series[] = {
+#ifdef CONFIG_SOC_CAMERA_GM7150
+ {
+ .name = STR(RK29_CAM_SENSOR_GM7150),
+ .sensor_init = gm7150_ad_init,
+ .sensor_deinit = gm7150_ad_deinit,
+ .sensor_get_cfg = gm7150_ad_get_cfg,
+ .sensor_check_cif_error = gm7150_ad_check_cif_error,
+ .sensor_check_id_cb = gm7150_check_id
+ },
+#endif
目录：include/media/v4l2-chip-ident.h
+ V4L2_IDENT_GM7150 = 274,
剩下这个四个文件
drivers/media/video/gm7150.c
drivers/media/video/gm7150.h
drivers/video/rockchip/vehicle/vehicle_ad_gm7150.c
drivers/video/rockchip/vehicle/vehicle_ad_gm7150.h
可以从我的github仓库下载。