专栏总目录
本文介绍RK3588平台的Camera:MIPI-CSI调试之通路解析
【资料图】
MIPI联【lián】盟,即移动产【chǎn】业处理【lǐ】器接口(Mobile Industry Processor Interface 简称MIPI)联盟。MIPI(移【yí】动产【chǎn】业【yè】处理【lǐ】器接口【kǒu】)是MIPI联盟发起的为移动应用处理器制定的开放标准和一个规【guī】范【fàn】。
目的是把手机内部的接口如摄像头、显示屏接口、射频/基【jī】带接口等标准化【huà】,从而【ér】减少手机设【shè】计的复杂程度和增【zēng】加【jiā】设计灵活性。
CSI & DSI
• CSI ( Camera Serial Interface ):摄【shè】像头【tóu】接口
• DSI ( Display Serial Interface ):显示接口
下【xià】图是RK3588 camera连接链路【lù】示意【yì】图,可以支持7路camera。
图中:mipi camera2---> csi2_dphy1 ---> mipi2_csi2 ---> rkcif_mipi_lvds2--->rkcif_mipi_lvds2_sditf --->rkisp0_vir2
对【duì】应节【jiē】点:imx415 ---> csi2_dphy0 ---> mipi2_csi2 ---> rkcif_mipi_lvds2--->rkcif_mipi_lvds2_sditf --->rkisp0_vir2
链接【jiē】关系:sensor---> csi2 dphy---->mipi csi host--->vicap
实线链路【lù】解析: Camera sensor ---> dphy ---> 通过【guò】mipi_csi2模【mó】块解析mipi协议---> vicap ( rkcif节点代【dài】表vicap )
虚【xū】线链路解【jiě】析:vicap ---> rkcif_mipi_lvds2_sditf ---> isp
每个vicap节点【diǎn】与isp的链接关系,通过对应【yīng】虚【xū】拟出的XXX_sditf来指【zhǐ】明链接【jiē】关系。
当使用dphy0_hw:
full mode:节【jiē】点名称使用csi2_dphy0,最多支持4 lane。当dphy0_hw使用full mode时【shí】,链路需要按【àn】照【zhào】csi2_dphy1这条链路来【lái】配置,但是节点名称csi2_dphy1需【xū】要修改为【wéi】csi2_dphy0,软件上是通过phy的序【xù】号来区分phy使【shǐ】用【yòng】的模式。split mode:拆分成2个phy使用,分别【bié】为csi2_dphy1(使用0/1 lane)、csi2_dphy2(使【shǐ】用2/3 lane),每个phy最【zuì】多【duō】支持2 lane。当使用dphy1_hw:
full mode:节点名称【chēng】使用csi2_dphy3,最多支持【chí】4 lane。当【dāng】dphy1_hw使用full mode时,链路需要按【àn】照csi2_dphy4这条链路来配置,但【dàn】是节点名【míng】称csi2_dphy4需【xū】要修改为csi2_dphy3,软件上是【shì】通过phy的序【xù】号来区分phy使用【yòng】的模【mó】式。split mode:拆分成2个【gè】phy使用,分别为csi2_dphy4(使用0/1 lane)、csi2_dphy5(使【shǐ】用2/3 lane),每个phy最多支持【chí】2 lane。dcphy:rk3588支持两个【gè】dcphy,节【jiē】点名称分别【bié】为csi2_dcphy0/csi2_dcphy1。每【měi】个dcphy硬【yìng】件支【zhī】持RX/TX同时使【shǐ】用,对于camera输入【rù】使用的【de】是RX。支持【chí】DPHY/CPHY协议复用;需【xū】要【yào】注意【yì】的是同【tóng】一个dcphy的TX/RX只【zhī】能同时使用DPHY或同时使用CPHY。其他dcphy参数请查阅rk3588数据手册。
使用上述mipi phy节点,需要把对【duì】应的【de】物理节【jiē】点配置【zhì】上。(csi2_dcphy0_hw/csi2_dcphy1_hw/csi2_dphy0_hw/csi2_dphy1_hw)
每个【gè】mipi phy都需要一个csi2模【mó】块来解析mipi协议,节点【diǎn】名【míng】称分【fèn】别为mipi0_csi2~mipi5_csi2。
rk3588所有camera数据都需【xū】要通【tōng】过vicap,再链接到isp。rk3588仅支持一个vicap硬【yìng】件,这个【gè】vicap支持同时输【shū】入6路mipi phy,及一路【lù】dvp数据,所以我们将vicap分【fèn】化【huà】成rkcif_mipi_lvds~rkcif_mipi_lvds5、rkcif_dvp等7个节点,各个节【jiē】点的绑定关系需要严格按【àn】照框图的节【jiē】点序号【hào】配置【zhì】。
每【měi】个vicap节点【diǎn】与isp的链接【jiē】关系,通过对应虚拟出的XXX_sditf来指【zhǐ】明链接【jiē】关系。
rk3588支持2个isp硬件,每个isp设备可虚拟出多个虚拟【nǐ】节点,软件上通过【guò】回读的方式【shì】,依次从ddr读取每一路的图像数据进【jìn】isp处理。对【duì】于多【duō】摄方案,建议将【jiāng】数【shù】据流平均【jun1】分配【pèi】到两个【gè】isp上【shàng】。
直通【tōng】与回读模式【shì】:•直【zhí】通:指数据经过vicap采集,直接发【fā】送给isp处【chù】理,不【bú】存储到ddr。需【xū】要注意的是hdr直通时【shí】,只有【yǒu】短帧是真正的直通,长帧需要存【cún】在ddr,isp再从ddr读取。
•回读:指数据经【jīng】过vicap采【cǎi】集到ddr,应用获取到数据后,将buffer地【dì】址【zhǐ】推【tuī】送【sòng】给isp,isp再从ddr获取图像数据。
•在dts配【pèi】置【zhì】时,一个isp硬【yìng】件,如果只【zhī】配置一个虚拟节点,默认使用直【zhí】通模式,如果配【pèi】置了多个虚拟节【jiē】点【diǎn】默认使用回读模【mó】式。
&i2c3 {status = "okay";imx415: imx415@1a {status = "okay";compatible = "sony,imx415";reg = < 0x1a >;clocks = < &cru CLK_MIPI_CAMARAOUT_M3 >;clock-names = "xvclk";pinctrl-names = "default";pinctrl-0 = < &mipim0_camera3_clk >;power-domains = < &power RK3588_PD_VI >;pwdn-gpios = < &gpio1 RK_PB0 GPIO_ACTIVE_HIGH >;reset-gpios = < &gpio4 RK_PA0 GPIO_ACTIVE_LOW >;rockchip,camera-module-index = < 0 >;rockchip,camera-module-facing = "back";rockchip,camera-module-name = "CMK-OT2022-PX1";rockchip,camera-module-lens-name = "IR0147-50IRC-8M-F20";port {imx415_out0: endpoint {remote-endpoint = < &mipidphy0_in_ucam0 >;data-lanes = < 1 2 3 4 >;};};};camera_imx219: camera-imx219@10 {status = "disabled";compatible = "sony,imx219";reg = < 0x10 >;clocks = < &clk_cam_24m >;clock-names = "xvclk";rockchip,camera-module-index = < 0 >;rockchip,camera-module-facing = "back";rockchip,camera-module-name = "rpi-camera-v2";rockchip,camera-module-lens-name = "default";port {imx219_out0: endpoint {remote-endpoint = < &mipidphy0_in_ucam1 >;data-lanes = < 1 2 >;};};};};&csi2_dphy0_hw {status = "okay";};&csi2_dphy0 {status = "okay";ports {#address-cells = < 1 >;#size-cells = < 0 >;port@0 {reg = < 0 >;#address-cells = < 1 >;#size-cells = < 0 >;mipidphy0_in_ucam0: endpoint@1 {reg = < 1 >;remote-endpoint = < &imx415_out0 >;data-lanes = < 1 2 3 4 >;};mipidphy0_in_ucam1: endpoint@2 {reg = < 2 >;remote-endpoint = < &imx219_out0 >;data-lanes = < 1 2 >;};};port@1 {reg = < 1 >;#address-cells = < 1 >;#size-cells = < 0 >;csidphy0_out: endpoint@0 {reg = < 0 >;remote-endpoint = < &mipi2_csi2_input >;};};};};&mipi2_csi2 {status = "okay";ports {#address-cells = < 1 >;#size-cells = < 0 >;port@0 {reg = < 0 >;#address-cells = < 1 >;#size-cells = < 0 >;mipi2_csi2_input: endpoint@1 {reg = < 1 >;remote-endpoint = < &csidphy0_out >;};};port@1 {reg = < 1 >;#address-cells = < 1 >;#size-cells = < 0 >;mipi2_csi2_output: endpoint@0 {reg = < 0 >;remote-endpoint = < &cif_mipi2_in0 >;};};};};&rkcif {status = "okay";};&rkcif_mipi_lvds2 {status = "okay";port {cif_mipi2_in0: endpoint {remote-endpoint = < &mipi2_csi2_output >;};};};&rkcif_mipi_lvds2_sditf {status = "okay";port {mipi_lvds2_sditf: endpoint {remote-endpoint = < &isp0_vir0 >;};};};&rkcif_mmu {status = "okay";};&rkisp0 {status = "okay";};&isp0_mmu {status = "okay";};&rkisp0_vir0 {status = "okay";port {#address-cells = < 1 >;#size-cells = < 0 >;isp0_vir0: endpoint@0 {reg = < 0 >;remote-endpoint = < &mipi_lvds2_sditf >;};};};&pinctrl {camera {cam_pwdn_gpio: cam-pwdn-gpio {rockchip,pins = < 1 RK_PB0 RK_FUNC_GPIO &pcfg_pull_up >;};};};
i2cdetect -y 3
gst-launch-1.0 v4l2src device=/dev/video11 ! video/x-raw,format=NV12,width=3840,height=2160, framerate=30/1 ! xvimagesink
Android系统:
Android系统自【zì】带【dài】相机APP。点击APP,看摄像【xiàng】画面是否正常显示。
dmesg | grep imx415
media-ctl -d /dev/media0 -p
审核编辑:汤梓红