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【jí】移动产【chǎn】业处理器接口(Mobile Industry Processor Interface 简称MIPI)联盟。MIPI(移动产业处理器【qì】接口)是MIPI联盟发【fā】起的为【wéi】移动应用处理器制定【dìng】的开【kāi】放标准和一个规范。
目的是把手机内部的接口如摄像头、显示屏接口、射频/基带接口等标【biāo】准化,从而减少手机设【shè】计的复杂程度和增【zēng】加设计灵活性【xìng】。
CSI & DSI
• CSI ( Camera Serial Interface ):摄像头【tóu】接口
• DSI ( Display Serial Interface ):显示接【jiē】口
下图是RK3588 camera连接链路示意【yì】图,可【kě】以支持【chí】7路camera。
图中:mipi camera2---> csi2_dphy1 ---> mipi2_csi2 ---> rkcif_mipi_lvds2--->rkcif_mipi_lvds2_sditf --->rkisp0_vir2
对【duì】应【yīng】节点:imx415 ---> csi2_dphy0 ---> mipi2_csi2 ---> rkcif_mipi_lvds2--->rkcif_mipi_lvds2_sditf --->rkisp0_vir2
链接关系:sensor---> csi2 dphy---->mipi csi host--->vicap
实线链路解析: Camera sensor ---> dphy ---> 通【tōng】过mipi_csi2模块解析mipi协议---> vicap ( rkcif节【jiē】点【diǎn】代【dài】表vicap )
虚线链【liàn】路解析【xī】:vicap ---> rkcif_mipi_lvds2_sditf ---> isp
每个vicap节点【diǎn】与isp的链【liàn】接关【guān】系,通过对应虚拟【nǐ】出的【de】XXX_sditf来指明链接关系。
当使用dphy0_hw:
full mode:节点名称使用csi2_dphy0,最多支持4 lane。当dphy0_hw使用【yòng】full mode时【shí】,链路需要按照【zhào】csi2_dphy1这条链路来配置,但是节点名称csi2_dphy1需【xū】要修改【gǎi】为csi2_dphy0,软件【jiàn】上是通过【guò】phy的【de】序号来区分phy使用的模式。split mode:拆分成2个phy使【shǐ】用,分【fèn】别【bié】为csi2_dphy1(使用【yòng】0/1 lane)、csi2_dphy2(使【shǐ】用2/3 lane),每个【gè】phy最多支持2 lane。当使用dphy1_hw:
full mode:节【jiē】点名称使【shǐ】用csi2_dphy3,最【zuì】多支持4 lane。当dphy1_hw使用full mode时,链路需要【yào】按【àn】照csi2_dphy4这条链路来【lái】配置,但是节【jiē】点名称csi2_dphy4需【xū】要修改【gǎi】为csi2_dphy3,软件上是通过phy的序号来区分phy使用的【de】模式。split mode:拆分成2个phy使用,分别为csi2_dphy4(使用0/1 lane)、csi2_dphy5(使用【yòng】2/3 lane),每个phy最【zuì】多支持2 lane。dcphy:rk3588支【zhī】持两个dcphy,节【jiē】点【diǎn】名称【chēng】分别为csi2_dcphy0/csi2_dcphy1。每个【gè】dcphy硬件支持RX/TX同时【shí】使【shǐ】用【yòng】,对于camera输入使用的是RX。支持DPHY/CPHY协议复用;需要注意【yì】的是同一【yī】个dcphy的TX/RX只能【néng】同时使用DPHY或同时使用CPHY。其他dcphy参数请查【chá】阅rk3588数据手【shǒu】册【cè】。
使用上【shàng】述mipi phy节【jiē】点,需要把对应的【de】物理节点配置上。(csi2_dcphy0_hw/csi2_dcphy1_hw/csi2_dphy0_hw/csi2_dphy1_hw)
每个mipi phy都【dōu】需要一个csi2模块来【lái】解析mipi协议,节【jiē】点名【míng】称分别为mipi0_csi2~mipi5_csi2。
rk3588所【suǒ】有【yǒu】camera数据都需要通过vicap,再链接到isp。rk3588仅支持一【yī】个vicap硬件,这个vicap支【zhī】持同【tóng】时【shí】输【shū】入6路mipi phy,及一路dvp数据【jù】,所以【yǐ】我们将vicap分化成rkcif_mipi_lvds~rkcif_mipi_lvds5、rkcif_dvp等7个节【jiē】点,各个【gè】节点的绑定【dìng】关系需要严格按照框图的【de】节点序号配置。
每个vicap节点与isp的【de】链接关系,通过对【duì】应虚拟出的XXX_sditf来指【zhǐ】明链接关系【xì】。
rk3588支持2个isp硬【yìng】件,每【měi】个isp设备可【kě】虚拟出多个虚拟节点,软【ruǎn】件上通过回读的方式,依次从ddr读取每【měi】一路的【de】图【tú】像数据进isp处【chù】理。对【duì】于多摄【shè】方案,建议将数据【jù】流平均分配到【dào】两个isp上。
直通与回读模【mó】式【shì】:•直通【tōng】:指数据经过vicap采集,直接发送给isp处理,不存储到ddr。需要注【zhù】意的是hdr直通【tōng】时,只有短帧是真正的【de】直通【tōng】,长帧【zhēn】需要存在ddr,isp再【zài】从ddr读取【qǔ】。
•回读:指数【shù】据经过vicap采集到ddr,应用获取到数据后,将【jiāng】buffer地址推送给isp,isp再从【cóng】ddr获取图【tú】像数据。
•在dts配置时,一个isp硬【yìng】件,如【rú】果只配置一【yī】个【gè】虚拟节点,默认使用直通模【mó】式,如【rú】果配置【zhì】了多个虚拟节点【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【tǒng】自【zì】带相机【jī】APP。点击【jī】APP,看摄像画面是否正常【cháng】显示。
dmesg | grep imx415
media-ctl -d /dev/media0 -p
审核编辑:汤梓红