根據需求 要HDMI codec 不同同時輸出。1、 hdmi_analog_sound: hdmi-analog-sound {status = "disabled";

2、rt5640 改成你實際對應的codec，如es8316，

sound: sound {status = "okay";compatible = "simple-audio-card";simple-audio-card,format = "i2s";simple-audio-card,name = "rockchip,rt5640-codec";simple-audio-card,mclk-fs = <512>;simple-audio-card,widgets ="Microphone", "Microphone Jack","Headphone", "Headphone Jack";simple-audio-card,routing ="MIC1", "Microphone Jack","MIC2", "Microphone Jack","Microphone Jack", "micbias1","Headphone Jack", "HPOL","Headphone Jack", "HPOR";simple-audio-card,dai-link@0 {format = "i2s";cpu {sound-dai = <&i2s>;};codec {sound-dai = <&rt5640>;};};simple-audio-card,dai-link@1 {format = "i2s";cpu {sound-dai = <&i2s>;};codec {sound-dai = <&hdmi>;};}; };

3、 注冊后 ls /dev/snd/ -al

rk3288:/ $ ls /dev/snd -al pcmC0D1p 是HDMI 聲卡。 ls /dev/snd -al total 0 drwxr-xr-x 2 root root 140 2013-01-18 08:50 . drwxr-xr-x 17 root root 1540 2013-01-18 08:50 .. crw-rw---- 1 system audio 116, 2 2013-01-18 08:50 controlC0 crw-rw---- 1 system audio 116, 4 2013-01-18 08:50 pcmC0D0c crw-rw---- 1 system audio 116, 3 2013-01-18 08:50 pcmC0D0p crw-rw---- 1 system audio 116, 5 2013-01-18 08:50 pcmC0D1p crw-rw---- 1 system audio 116, 33 2013-01-18 08:50 timer rk3288:/ $

4打patch

/hardware/rockchip/audio/tinyalsa_hal$ git diff ./ diff --git a/tinyalsa_hal/audio_hw.c b/tinyalsa_hal/audio_hw.c index d1e6e41..a924eba 100755 --- a/tinyalsa_hal/audio_hw.c +++ b/tinyalsa_hal/audio_hw.c @@ -645,6 +645,7 @@ static int start_output_stream(struct stream_out *out)} #endif #endif + out->pcm_device = 1;out->pcm[PCM_CARD_HDMI] = pcm_open(PCM_CARD_HDMI, out->pcm_device,PCM_OUT | PCM_MONOTONIC, &out->config);if (out->pcm[PCM_CARD_HDMI] && @@ -664,7 +665,20 @@ static int start_output_stream(struct stream_out *out)AUDIO_DEVICE_OUT_WIRED_HEADSET |AUDIO_DEVICE_OUT_WIRED_HEADPHONE |AUDIO_DEVICE_OUT_ALL_SCO)) { - + /* open & close hdmi card to mute hdmi audio */ + out->pcm_device = 1; + out->pcm[PCM_CARD_HDMI] = pcm_open(PCM_CARD_HDMI, out->pcm_device, + PCM_OUT | PCM_MONOTONIC, &out->config); + if (out->pcm[PCM_CARD_HDMI] && + !pcm_is_ready(out->pcm[PCM_CARD_HDMI])) { + ALOGE("pcm_open(PCM_CARD_HDMI) failed: %s", + pcm_get_error(out->pcm[PCM_CARD_HDMI])); + pcm_close(out->pcm[PCM_CARD_HDMI]); + return -ENOMEM; + } + if (out->pcm[PCM_CARD_HDMI]) + pcm_close(out->pcm[PCM_CARD_HDMI]); + out->pcm_device = 0;out->pcm[PCM_CARD] = pcm_open(PCM_CARD, out->pcm_device,PCM_OUT | PCM_MONOTONIC, &out->config);if (out->pcm[PCM_CARD] && !pcm_is_ready(out->pcm[PCM_CARD])) { @@ -677,7 +691,8 @@ static int start_output_stream(struct stream_out *out)}if (out->device & AUDIO_DEVICE_OUT_SPDIF) { - out->pcm[PCM_CARD_SPDIF] = pcm_open(PCM_CARD_SPDIF, out->pcm_device, + out->pcm_device = 0; + out->pcm[PCM_CARD_SPDIF] = pcm_open(PCM_CARD_SPDIF, out->pcm_device,PCM_OUT | PCM_MONOTONIC, &out->config);if (out->pcm[PCM_CARD_SPDIF] &&

5、

hardware/rockchip/audio/tinyalsa_hal$ 目錄下面所有的PCM_CARD_HDMI 改為 PCM_CARD_HDMI = 0；

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