Lines Matching +full:i2s +full:- +full:tx +full:- +full:route
8 Dynamic PCM allows an ALSA PCM device to digitally route its PCM audio to
9 various digital endpoints during the PCM stream runtime. e.g. PCM0 can route
10 digital audio to I2S DAI0, I2S DAI1 or PDM DAI2. This is useful for on SoC DSP
11 drivers that expose several ALSA PCMs and can route to multiple DAIs.
18 DPCM re-uses all the existing component codec, platform and DAI drivers without
23 -------------------------------------
26 document for all examples :-
32 PCM0 <------------> * * <----DAI0-----> Codec Headset
34 PCM1 <------------> * * <----DAI1-----> Codec Speakers
36 PCM2 <------------> * * <----DAI2-----> MODEM
38 PCM3 <------------> * * <----DAI3-----> BT
40 * * <----DAI4-----> DMIC
42 * * <----DAI5-----> FM
48 supports 6 back end (BE) DAIs. Each FE PCM can digitally route audio data to any
49 of the BE DAIs. The FE PCM devices can also route audio to more than 1 BE DAI.
53 Example - DPCM Switching playback from DAI0 to DAI1
54 ---------------------------------------------------
59 Playback on PCM0 to Headset would look like :-
65 PCM1 <------------> * * <----DAI1-----> Codec Speakers
67 PCM2 <------------> * * <----DAI2-----> MODEM
69 PCM3 <------------> * * <----DAI3-----> BT
71 * * <----DAI4-----> DMIC
73 * * <----DAI5-----> FM
76 The headset is removed from the jack by user so the speakers must now be used :-
80 PCM0 <============> * * <----DAI0-----> Codec Headset
82 PCM1 <------------> * * <====DAI1=====> Codec Speakers
84 PCM2 <------------> * * <----DAI2-----> MODEM
86 PCM3 <------------> * * <----DAI3-----> BT
88 * * <----DAI4-----> DMIC
90 * * <----DAI5-----> FM
93 The audio driver processes this as follows :-
117 except that we also have to :-
127 -------------------
133 PCM0 <------------> * * <----DAI0-----> Codec Headset
135 PCM1 <------------> * * <----DAI1-----> Codec Speakers
137 PCM2 <------------> * * <----DAI2-----> MODEM
139 PCM3 <------------> * * <----DAI3-----> BT
141 * * <----DAI4-----> DMIC
143 * * <----DAI5-----> FM
147 FE DAI links are defined as follows :-
155 .platform_name = "dsp-audio",
156 .codec_name = "snd-soc-dummy",
157 .codec_dai_name = "snd-soc-dummy-dai",
176 The BE DAIs are configured as follows :-
183 .cpu_dai_name = "ssp-dai.0",
184 .platform_name = "snd-soc-dummy",
186 .codec_name = "rt5640.0-001c",
187 .codec_dai_name = "rt5640-aif1",
204 like a BT phone call :-
208 PCM0 <------------> * * <----DAI0-----> Codec Headset
210 PCM1 <------------> * * <----DAI1-----> Codec Speakers
212 PCM2 <------------> * * <====DAI2=====> MODEM
214 PCM3 <------------> * * <====DAI3=====> BT
216 * * <----DAI4-----> DMIC
218 * * <----DAI5-----> FM
232 --------------------
253 rate->min = rate->max = 48000;
254 channels->min = channels->max = 2;
265 ------------------------
269 has to be set explicitly in the driver :-
272 /* BE for codec Headset - DAI0 is dummy and managed by DSP FW */
282 implement :-
284 1. Front End PCM DAIs - i.e. struct snd_soc_dai_driver.
298 have :-
302 SND_SOC_DAPM_AIF_OUT("DAI0 TX", NULL, 0, SND_SOC_NOPM, 0, 0),
316 PCM0 <------------> * * <----DAI0-----> Codec Headset
318 PCM1 <------------> * * <====DAI1=====> Codec Speakers/Mic
320 PCM2 <------------> * * <====DAI2=====> MODEM
322 PCM3 <------------> * * <----DAI3-----> BT
324 * * <----DAI4-----> DMIC
326 * * <----DAI5-----> FM
332 The host can control the hostless link either by :-
334 1. Configuring the link as a CODEC <-> CODEC style link. In this case the link
342 userspace code to control the link. Its recommended to use CODEC<->CODEC
346 CODEC <-> CODEC link
347 --------------------
367 .codec_dai_name = "modem-aif1",
382 -----------