Lines Matching +full:fixed +full:- +full:links
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
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 :-
119 1. Define the FE and BE DAI links.
126 FE and BE DAI links
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
146 For the example above we have to define 4 FE DAI links and 6 BE DAI links. The
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",
161 .....< other FE and BE DAI links here >
174 The BE DAIs are configured as follows :-
178 .....< FE DAI links here >
181 .cpu_dai_name = "ssp-dai.0",
182 .platform_name = "snd-soc-dummy",
184 .codec_name = "rt5640.0-001c",
185 .codec_dai_name = "rt5640-aif1",
191 .....< other BE DAI links here >
199 like a BT phone call :-
203 PCM0 <------------> * * <----DAI0-----> Codec Headset
205 PCM1 <------------> * * <----DAI1-----> Codec Speakers
207 PCM2 <------------> * * <====DAI2=====> MODEM
209 PCM3 <------------> * * <====DAI3=====> BT
211 * * <----DAI4-----> DMIC
213 * * <----DAI5-----> FM
227 --------------------
233 e.g. DSP converts all FE hw params to run at fixed rate of 48k, 16bit, stereo for
234 DAI0. This means all FE hw_params have to be fixed in the machine driver for
248 rate->min = rate->max = 48000;
249 channels->min = channels->max = 2;
256 The other PCM operation are the same as for regular DAI links. Use as necessary.
260 ------------------------
262 The BE DAI links will normally be connected to the graph at initialisation time
264 has to be set explicitly in the driver :-
267 /* BE for codec Headset - DAI0 is dummy and managed by DSP FW */
277 implement :-
279 1. Front End PCM DAIs - i.e. struct snd_soc_dai_driver.
293 have :-
311 PCM0 <------------> * * <----DAI0-----> Codec Headset
313 PCM1 <------------> * * <====DAI1=====> Codec Speakers/Mic
315 PCM2 <------------> * * <====DAI2=====> MODEM
317 PCM3 <------------> * * <----DAI3-----> BT
319 * * <----DAI4-----> DMIC
321 * * <----DAI5-----> FM
327 The host can control the hostless link either by :-
329 1. Configuring the link as a CODEC <-> CODEC style link. In this case the link
334 2. Hostless FE. This FE has a virtual connection to the BE DAI links on the DAPM
336 This method gives more control over the DAI links, but requires much more
337 userspace code to control the link. Its recommended to use CODEC<->CODEC
341 CODEC <-> CODEC link
342 --------------------
357 < ... more DAI links above ... >
362 .codec_dai_name = "modem-aif1",
369 < ... more DAI links here ... >
378 -----------
382 DAI links. The DAI links will be started when the FE PCM is started and stopped