audio_policy_rk30board.conf
# devices AUDIO_DEVICE_OUT_EARPIECE|AUDIO_DEVICE_OUT_SPEAKER|AUDIO_DEVICE_OUT_WIRED_HEADSET|AUDIO_DEVICE_OUT_WIRED_HEADPHONE|AUDIO_DEVICE_OUT_ALL_SCO|AUDIO_DEVICE_OUT_AUX_DIGITAL|AUDIO_DEVICE_OUT_SP
devices AUDIO_DEVICE_OUT_EARPIECE|AUDIO_DEVICE_OUT_SPEAKER|AUDIO_DEVICE_OUT_WIRED_HEADSET|AUDIO_DEVICE_OUT_WIRED_HEADPHONE|AUDIO_DEVICE_OUT_ALL_SCO|AUDIO_DEVICE_OUT_SPDIFdts修改
&hdmi_sound {
status: "disabled"
}如果tinyalsa_hal/audio_hw.h中有对应的宏，将其注释
如PCM_CARD_HDMI
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| ## RK3288 HDMI配置和调试 |
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| * | RK3288 最大输出分辨率为 3840x2160 |-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | HDMI 驱动代码位于 kernel/drivers/video/rockchip/hdmi/rockchip-hdmiv2目录 1 、设置默认输出分辨率 网上的资源是修改 kernel/drivers/video/rockchip/hdmi/rockchip-hdmiv2中的 rockchip-hdmi.h 文件， /* HDMI defaultvide mode */ #define HDMI_VIDEO_DEFAULT_MODE HDMI_1280X720P_60HZ 官方文档中是修改板级 dts 文件，路径为kernel\arch\arm\boot\dts\xxx.dts 在 hdmi 节点中添加 rockchip,defaultmode = <value>，<value>值可以在 rockchip-hdmi.h的 hdmi_video_infomation_code 中查到相应值。 hdmi_video_infomation_code是一个枚举数组，从 1 开始，想设置哪个分辨率，value 值就填此分辨率的序号。 设置前首先得支持此分辨率。查看支持的分辨率：cat/sys/class/display/HDMI/modes 例如，设置默认分辨率为1280x720P60Hz输出： //路径：kernel\arch\arm\boot\dts\xxx.dts &hdmi { status = "okay"; rockchip,hdmi_video_source = <DISPLAY_SOURCE_LCDC1>; rockchip,defaultmode = <4>; }; //路径：kernel\drivers\video\rockchip\hdmi\rockchip-hdmi.h /* HDMI videoinformation code according CEA-861-F */ enum hdmi_video_infomation_code { HDMI_640X480P_60HZ = 1, HDMI_720X480P_60HZ_4_3, HDMI_720X480P_60HZ_16_9, HDMI_1280X720P_60HZ, ... } 2 、调试方法 ##### 本帖隐藏的内容 查看sink设备的EDID信息，含原始数据和解析后信息。 cat /sys/class/display/HDMI/debug shell@xxx:/ cat/sys/class/display/HDMI/debug //EDID状态 EDID status:Okay //原始数据 Raw Data: 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x05, 0xe3, 0x80, 0x22, 0xfd, 0x05, 0x00, 0x00, 0x0e, 0x1a, 0x01, 0x03, 0xa0, 0x30, 0x1b, 0x78, 0xba, 0x5a, 0x65, 0xa7, 0x56, 0x52, 0x9c, 0x27, 0x0f, 0x50, 0x54, 0xbf, 0xef, 0x00, 0xd1, 0xc0, 0xb3, 0x00, 0x95, 0x00, 0x81, 0x80, 0x81, 0x40, 0x81, 0xc0, 0x01, 0x01, 0x01, 0x01, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c, 0x45, 0x00, 0xdd, 0x0c, 0x11, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x32, 0x4c, 0x1e, 0x53, 0x11, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfc, 0x00, 0x32, 0x32, 0x38, 0x30, 0x57, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xff, 0x00, 0x41, 0x42, 0x38, 0x30, 0x36, 0x31, 0x34, 0x5a, 0x30, 0x31, 0x35, 0x33, 0x33, 0x01, 0xa8, 0x02, 0x03, 0x1b, 0x71, 0x23, 0x09, 0x07, 0x07, 0x83, 0x01, 0x00, 0x00, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00, 0x80, 0x21, 0x43, 0x01, 0x10, 0x84, 0xe2, 0x00, 0x0f, 0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00, 0x81, 0x49, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xbf, \*\*\*\*\*\*\*\* Show SinkInfo \*\*\*\*\*\*\*\* //最大\*\*\*s通道时钟频率 Max \*\*\*s clk is 0 //支持的分辨率 Support videomode: 1920x1080p@60Hz 1280x720p@60Hz //支持的视频颜色模式 Support videocolor mode: RGB YCbCr422 YCbCr444 //支持的视频颜色位深 Support videocolor depth: 24bit //支持的音频类型 Support audiotype: LPCM //支持的最大音频通道 Support max audiochannel is 2 //支持的音频采样速率 Support audiosample rate: 32000 44100 48000 //支持的音频字长 Support audio wordlenght: 16bit 20bit 24bit 查看支持的分辨率 cat/sys/class/display/HDMI/modes 查看当前分辨率 cat/sys/class/display/HDMI/mode 切换分辨率 echo1920x1080p-60 > /sys/class/display/HDMI/mode 查看HDMI是否连接 cat/sys/class/display/HDMI/connect 查看HDMI使能状态 cat/sys/class/display/HDMI/enable 设置HDMI使能，<value> 可取0或1，0表示关闭，1表示开启。 echo\
| * |