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rv1126bp之mipi sensor驱动

news 2025/9/11 8:27:47

硬件框图

在这里插入图片描述

设备树配置

&i2c1 {status = "okay";pinctrl-0 = <&i2c1m3_pins>;imx415: imx415@1a {compatible = "sony,imx415";reg = <0x1a>;clocks = <&cru CLK_MIPI0_OUT2IO>;clock-names = "xvclk";power-gpios = <&gpio4 RK_PA6 GPIO_ACTIVE_HIGH>;  /*1v2 2v8*/reset-gpios = <&gpio4 RK_PA3 GPIO_ACTIVE_HIGH>;pinctrl-names = "default";pinctrl-0 = <&cam_clk0_pins>;rockchip,camera-module-index = <0>;rockchip,camera-module-facing = "back";rockchip,camera-module-name = "default";rockchip,camera-module-lens-name = "default";rockchip,camera-hdr-mode = <0>; /*NO_HDR:0*/  port {imx415_out: endpoint {remote-endpoint = <&csi_dphy_input>;data-lanes = <1 2 3 4>;};};};
};&csi2_dphy0 {status = "okay";ports {#address-cells = <1>;#size-cells = <0>;port@0 {reg = <0>;#address-cells = <1>;#size-cells = <0>;csi_dphy_input: endpoint@2 {reg = <2>;remote-endpoint = <&imx415_out>;data-lanes = <1 2 3 4>;};};port@1 {reg = <1>;#address-cells = <1>;#size-cells = <0>;csidphy0_out: endpoint@0 {reg = <0>;remote-endpoint = <&mipi0_csi2_input>;};};};
};&mipi0_csi2 {status = "okay";ports {#address-cells = <1>;#size-cells = <0>;port@0 {reg = <0>;#address-cells = <1>;#size-cells = <0>;mipi0_csi2_input: endpoint@1 {reg = <1>;remote-endpoint = <&csidphy0_out>;};};port@1 {reg = <1>;#address-cells = <1>;#size-cells = <0>;mipi0_csi2_output: endpoint@0 {reg = <0>;remote-endpoint = <&cif_mipi_in0>;};};};
};&rkcif {status = "okay";
};&rkcif_mipi_lvds {status = "okay";port {cif_mipi_in0: endpoint {remote-endpoint = <&mipi0_csi2_output>;};};
};&rkcif_mipi_lvds_sditf {status = "okay";port {mipi_lvds_sditf: endpoint {remote-endpoint = <&isp_vir0>;};};
};&rkcif_mmu {status = "okay";
};&rkisp {status = "okay";
};&rkisp_mmu {status = "okay";
};&rkisp_vir0 {status = "okay";port {#address-cells = <1>;#size-cells = <0>;isp_vir0: endpoint@0 {reg = <0>;remote-endpoint = <&mipi_lvds_sditf>;};};
};&rkisp_vir0_sditf {status = "okay";
};&rkvpss {status = "okay";dvbm = <&rkdvbm>;
};&rkvpss_mmu {status = "okay";
};&rkvpss_vir0 {status = "okay";
};

驱动配置

1）rv1126bp kernel为6.1，drivers/media/i2c默认支持imx415的驱动
2）驱动中只需要配置上电与复位控制。
3）supported_modes配置列表是选择imx415输出的配置参数。

驱动测试

1）判断camera驱动是否加载成功

dmesg | grep Async
[ 0.682982] RKISP: Async subdev notifier completed

2）RKISP注册的video节点

grep "" /sys/class/video4linux/*/name
/sys/class/video4linux/v4l-subdev0/name:rkisp-vir0-sditf
/sys/class/video4linux/v4l-subdev1/name:rockchip-mipi-csi2
/sys/class/video4linux/v4l-subdev2/name:rockchip-csi2-dphy0
/sys/class/video4linux/v4l-subdev3/name:m00_b_imx415 1-001a
/sys/class/video4linux/v4l-subdev4/name:rkisp-isp-subdev
/sys/class/video4linux/v4l-subdev5/name:rkcif-mipi-lvds
/sys/class/video4linux/video0/name:stream_cif_mipi_id0
/sys/class/video4linux/video1/name:stream_cif_mipi_id1
/sys/class/video4linux/video10/name:rkcif_tools_id2
/sys/class/video4linux/video11/name:rkisp_mainpath
/sys/class/video4linux/video12/name:rkisp_selfpath
/sys/class/video4linux/video13/name:rkisp_iqtool
/sys/class/video4linux/video14/name:rkisp_rawrd0_m
/sys/class/video4linux/video15/name:rkisp_rawrd2_s
/sys/class/video4linux/video16/name:rkisp-statistics
/sys/class/video4linux/video17/name:rkisp-input-params
/sys/class/video4linux/video18/name:rkisp-pdaf
/sys/class/video4linux/video19/name:rkvpss-offline
/sys/class/video4linux/video2/name:stream_cif_mipi_id2
/sys/class/video4linux/video20/name:rkvpss_scale0
/sys/class/video4linux/video21/name:rkvpss_scale1
/sys/class/video4linux/video22/name:rkvpss_scale2
/sys/class/video4linux/video23/name:rkvpss_scale3
/sys/class/video4linux/video24/name:rkvpss_scale4
/sys/class/video4linux/video25/name:rkvpss_scale5
/sys/class/video4linux/video3/name:stream_cif_mipi_id3
/sys/class/video4linux/video4/name:rkcif_scale_ch0
/sys/class/video4linux/video5/name:rkcif_scale_ch1
/sys/class/video4linux/video6/name:rkcif_scale_ch2
/sys/class/video4linux/video7/name:rkcif_scale_ch3
/sys/class/video4linux/video8/name:rkcif_tools_id0
/sys/class/video4linux/video9/name:rkcif_tools_id1

3）查看/dev/video20支持的格式

v4l2-ctl --list-formats-ext --device /dev/video20

4）v4l2-ctl抓取nv12图

v4l2-ctl --verbose -d /dev/video20 \
--set-fmt-video=width=3840,height=2160,pixelformat='NV12' \
--stream-mmap=4 \
--set-selection=target=crop,flags=0,top=0,left=0,width=3840,height=2160 \
--stream-count=10 \
--stream-to=/tmp/out.yuv

测试用例

应用测试代码请参考external/samples/simple_test/simple_vi_get_frame_rkaiq.c进行编写。

测试时序

帧率测量

1）帧率
在这里插入图片描述
2）vblank

3）总结：帧率：30Hz, 33.3ms, vblank大致为300us, 数据实际传输时间为33.3ms - 0.3ms = 33ms

测量场高

现在已知一帧有效传输时间，我们如果能把一行的时间量出来，那么就知道一帧时间传了多少行。
一般情况下用10us，根据实际情况前后调整。能看到周期，这个是行周期，为15us。
算一下行是多少：33000us/15us = 2200 行

测量行宽

在这里插入图片描述

以上是测量到一行内的有效传输时间，为11us
在已知一行有效传输时间，如果能把一个像素的传输时间知道，那么就知道一行传输了多少个点了。
但是一个像素的时间从波形不能直观的看出来。
imx415传输raw10，所以一个点占用10个bit，每个像素分平均到了不同lane传输。
可以这样认为:
- 一行传输时间=一行总数据量/传输速率/lane数
- 一行总数据量=宽xbit数
- 宽=一行传输时间xlane数x传输速率/bit数
- 宽=11usx4x892mbps/10= 3924

代码配置

static const s64 link_freq_items[] = {MIPI_FREQ_297M,MIPI_FREQ_446M,MIPI_FREQ_743M,MIPI_FREQ_891M,MIPI_FREQ_1188M,
};static const struct imx415_mode supported_modes[] = {/** frame rate = 1 / (Vtt * 1H) = 1 / (VMAX * 1H)* VMAX >= (PIX_VWIDTH / 2) + 46 = height + 46*/{.bus_fmt = MEDIA_BUS_FMT_SGBRG10_1X10,.width = 3864,.height = 2192,.max_fps = {.numerator = 10000,.denominator = 300000,},.exp_def = 0x08ca - 0x08,.hts_def = 0x044c * IMX415_4LANES * 2,.vts_def = 0x08ca,.global_reg_list = imx415_global_10bit_3864x2192_regs,.reg_list = imx415_linear_10bit_3864x2192_891M_regs,.hdr_mode = NO_HDR,.mipi_freq_idx = 1,.bpp = 10,/*.vc[PAD0] = 0,*/.xvclk = IMX415_XVCLK_FREQ_37M,},
};