RK3399三屏显示及声音调试

这个文档主要讲述怎么调试三屏显示及三个声卡配置及调试过程

声卡调试

最近在调试RK3399平板，调试到HDMI和cdn_dp过程中出现一些问题，我的目标是三屏分别是HDMI、edp、cdn_dp，分别对的声卡为HDMI_sound,rt5640_codec,rockchip-cdndp-sound,三屏同显，声音自动切换输出。
在调试过程中，cdn_dp的声音一直无法输出，发现参考官方提供的
/{
hdmi_dp_sound: hdmi-dp-sound {
status = “disabled”;
compatible = “rockchip,rk3399-hdmi-dp”;
rockchip,cpu = <&i2s2>;
rockchip,codec = <&hdmi>, <&cdn_dp>;
};
};
&hdmi_dp_sound{
status = “okay”;
}；
这样设置只能出现一个声卡就是rt5640，其他的声卡都无法注册成功。
经过rockchip工程师指导，将kernel-4.19\sound\soc\rockchip\rockchip_cdndp.c和kernel-4.19\sound\soc\rockchip\rockchip_hdmi_dp.c加入编译，并修改设备树为
/{
dp_sound: dp-sound {
status = “disabled”;
compatible = “rockchip,cdndp-sound”;
rockchip,cpu = <&spdif>;
rockchip,codec = <&cdn_dp 1>;
};
}；
&cdn_dp {
status = “okay”;
extcon = <&fusb0>;
phys = <&tcphy0_dp>;
};
&dp_sound {
status = “okay”;
};
&spdif{
status = “okay”;
};
这个时候发现dp_sound 还是注册不上，最后通过查看代码发现是rockchip_cdndp.c中固定了.codec_dai_name = “spdif-hifi”,
static struct snd_soc_dai_link cdndp_dailink = {
.name = “DP”,
.stream_name = “DP PCM”,
.codec_dai_name = “spdif-hifi”,
.ops = &rockchip_sound_cdndp_ops,
.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS,
};
从而将设备树修改下，最终可以注册成功，使用tinyplay播放音频正常。

/{
dp_sound: dp-sound {
status = “disabled”;
compatible = “rockchip,cdndp-sound”;
rockchip,cpu = <&spdif>;
rockchip,codec = <&cdn_dp>;
};
}；

至此声卡调试OK

同显调试

最后在测试的过程中发现把HDMI和扩展坞的HDMI都插上之后，扩展坞插着的HDMI显示器，显示的图像颜色不对，偏粉。

查看HDMI的显示模式，得到的是YUV444，由于cdn_dp和HDMI是在一个VOP上，从而导致扩展坞上的HDMI显示不正确。通过帖子https://blog.csdn.net/qq_37858386/article/details/114267928中的修改方法修改。最终得到正确的颜色
至此三屏同显调试完成。

最终的设备树及修改的详情

/{
dp_sound: dp-sound {
status = “disabled”;
compatible = “rockchip,cdndp-sound”;
rockchip,cpu = <&spdif>;
rockchip,codec = <&cdn_dp>;
};
hdmi_sound: hdmi-sound {
status = “okay”;
compatible = “simple-audio-card”;
simple-audio-card,format = “i2s”;
simple-audio-card,mclk-fs = <256>;
simple-audio-card,name = “rockchip,hdmi”;

 simple-audio-card,cpu {sound-dai = <&i2s2>;};simple-audio-card,codec {sound-dai = <&hdmi>;};
};
rt5640-sound {compatible = "simple-audio-card";simple-audio-card,format = "i2s";simple-audio-card,name = "rockchip,rt5640-codec";simple-audio-card,mclk-fs = <256>;simple-audio-card,widgets ="Microphone", "Mic Jack","Line", "Mic Headset","Headphone", "Headphone Jack";simple-audio-card,routing ="Mic Jack", "MICBIAS1","IN2P", "Mic Jack","DMIC1", "Mic Headset","DMIC2", "Mic Headset","Headphone Jack", "HPOL","Headphone Jack", "HPOR";simple-audio-card,cpu {sound-dai = <&i2s0>;};simple-audio-card,codec {sound-dai = <&rt5640>;};
};panel {compatible = "simple-panel";backlight = <&backlight>;status = "okay";//power-supply = <&vcc3v3_lcd_edp>;enable-gpios = <&gpio3 RK_PA3 GPIO_ACTIVE_HIGH>;bus-format = <MEDIA_BUS_FMT_RGB888_1X24>;bpc = <8>;prepare-delay-ms = <210>;enable-delay-ms = <210>;display-timings {native-mode = <&timing0>;timing0: timing0 {clock-frequency = <148500000>;    //1080P50Hz    117800000hactive = <1920>;vactive = <1080>;hfront-porch = <192>;hsync-len = <44>;hback-porch = <44>;vfront-porch = <36>;vsync-len = <5>;vback-porch = <4>;hsync-active = <0>;vsync-active = <0>;de-active = <0>;pixelclk-active = <0>;};};ports {panel_in: endpoint {remote-endpoint = <&edp_out>;};};
};

};
&pwm3{
pinctrl-0 = <&pwm3a_pin>;
status = “okay”;
};
//EDP、HDMI、DP
&cdn_dp {
status = “okay”;
extcon = <&fusb0>;
phys = <&tcphy0_dp>;
};
&dp_sound {
status = “okay”;
};
&spdif{
status = “okay”;
};
&hdmi_sound{
status = “okay”;
};
&display_subsystem {
status = “okay”;
};
&vopb {
status = “okay”;
assigned-clocks = <&cru DCLK_VOP0_DIV>;
assigned-clock-parents = <&cru PLL_VPLL>;
};
&vopl {
status = “okay”;
assigned-clocks = <&cru DCLK_VOP1_DIV>;
assigned-clock-parents = <&cru PLL_CPLL>;
};
&vopb_mmu {
status = “okay”;
};
&vopl_mmu {
status = “okay”;
};
&edp {
status = “okay”;
force-hpd;
//enable-delay-ms = <200>;
ports {
port@1 {
reg = <1>;
#address-cells = <1>;
#size-cells = <0>;
edp_out: endpoint {
remote-endpoint = <&panel_in>;
};
};
};
};

&edp_in_vopb {
status = “disabled”;
};

&edp_in_vopl {
status = “okay”;
};

&route_edp{
status = “okay”;
logo,uboot = “logo.bmp”; // 指定U-Boot logo显示的图片
logo,kernel = “logo_kernel.bmp”; // 指定kernel logo显示的图片
logo,mode = “center”; // center：居中显示，fullscreen：全屏显示
charge_logo,mode = “center”; // center：居中显示，fullscreen：全屏显示
connect = <&vopl_out_edp>;
};

&hdmi {
pinctrl-names = “default”;
pinctrl-0 = <&hdmi_i2c_xfer>, <&hdmi_cec>;
// #address-cells = <1>;
// #size-cells = <0>;
#sound-dai-cells = <0>;
// rockchip,defaultmode = <4>;
status = “okay”;
};

&hdmi_in_vopl {
status = “disabled”;
};
&hdmi_in_vopb {
status = “okay”;
};

&hdmi {
status = “okay”;
};
&dp_in_vopb {
status = “okay”;
};
&dp_in_vopl {
status = “disabled”;
};
&i2s2 {
#sound-dai-cells = <0>;
status = “okay”;
};
&tcphy0 {
extcon = <&fusb0>;
status = “okay”;
};
&u2phy0 {
status = “okay”;
extcon = <&fusb0>;

u2phy0_otg: otg-port {status = "okay";
};u2phy0_host: host-port {phy-supply = <&vcc5v0_host>;status = "okay";
};

};
&usbdrd3_0 {
status = “okay”;
};

&usbdrd_dwc3_0 {
status = “okay”;
extcon = <&fusb0>;
};

引用：
[1]: https://blog.csdn.net/qq_37858386/article/details/114267928

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RK3399在android12中三屏显示及声音调试

这个文档主要讲述怎么调试三屏显示及三个声卡配置及调试过程

声卡调试

同显调试

最终的设备树及修改的详情

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