On 12/4/17 10:44 AM, Ughreja, Rakesh A wrote:
-----Original Message-----
From: Pierre-Louis Bossart [mailto:pierre-louis.bossart@xxxxxxxxxxxxxxx]
Sent: Monday, December 4, 2017 10:11 PM
To: Ughreja, Rakesh A <rakesh.a.ughreja@xxxxxxxxx>; alsa-devel@alsa-
project.org; broonie@xxxxxxxxxx; tiwai@xxxxxxx; liam.r.girdwood@xxxxxxxxxxxxxxx
Cc: Koul, Vinod <vinod.koul@xxxxxxxxx>; Patches Audio
<patches.audio@xxxxxxxxx>
Subject: Re: [RFC 03/10] ASoC: Intel: Skylake: add HDA BE DAIs
On 12/4/17 10:14 AM, Ughreja, Rakesh A wrote:
-----Original Message-----
From: Pierre-Louis Bossart [mailto:pierre-louis.bossart@xxxxxxxxxxxxxxx]
Sent: Friday, December 1, 2017 11:50 PM
To: Ughreja, Rakesh A <rakesh.a.ughreja@xxxxxxxxx>; alsa-devel@alsa-
project.org; broonie@xxxxxxxxxx; tiwai@xxxxxxx;
liam.r.girdwood@xxxxxxxxxxxxxxx
Cc: Koul, Vinod <vinod.koul@xxxxxxxxx>; Patches Audio
<patches.audio@xxxxxxxxx>
Subject: Re: [RFC 03/10] ASoC: Intel: Skylake: add HDA BE DAIs
On 12/1/17 3:14 AM, Rakesh Ughreja wrote:
Add support for HDA BE DAIs in SKL platform driver.
Signed-off-by: Rakesh Ughreja <rakesh.a.ughreja@xxxxxxxxx>
---
sound/soc/intel/skylake/skl-pcm.c | 32 +++++++++++++++++++++++++--
----
-
1 file changed, 25 insertions(+), 7 deletions(-)
diff --git a/sound/soc/intel/skylake/skl-pcm.c b/sound/soc/intel/skylake/skl-
pcm.c
index e6fee7a..3dcb241 100644
--- a/sound/soc/intel/skylake/skl-pcm.c
+++ b/sound/soc/intel/skylake/skl-pcm.c
@@ -956,21 +956,39 @@ static struct snd_soc_dai_driver skl_platform_dai[]
= {
},
},
{
- .name = "HD-Codec Pin",
+ .name = "Analog CPU DAI",
.ops = &skl_link_dai_ops,
.playback = {
- .stream_name = "HD-Codec Tx",
- .channels_min = HDA_STEREO,
+ .stream_name = "Analog CPU Playback",
+ .channels_min = HDA_MONO,
.channels_max = HDA_STEREO,
.rates = SNDRV_PCM_RATE_48000,
- .formats = SNDRV_PCM_FMTBIT_S16_LE,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S24_LE,
},
.capture = {
- .stream_name = "HD-Codec Rx",
- .channels_min = HDA_STEREO,
+ .stream_name = "Analog CPU Capture",
+ .channels_min = HDA_MONO,
.channels_max = HDA_STEREO,
.rates = SNDRV_PCM_RATE_48000,
- .formats = SNDRV_PCM_FMTBIT_S16_LE,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S24_LE,
+ },
+},
+{
+ .name = "Digital CPU DAI",
I am not sure I get the meaning of analog/digital.
Did you mean external codec vs. iDisp codec?
Or did you really mean analog? I don't think you can control this front
the CPU side, e.g. if the codec has an S/PDIF output it remains digital.
I was trying to map the BE CPU DAIs to hda_pcm_stream.
The way it is defined here.
https://elixir.free-electrons.com/linux/v4.15-
rc2/source/sound/pci/hda/hda_generic.c#L5374
ok, but I still don't know what those BEs are supposed to refer to or mean.
In the ASoC HDA codec driver it maps the hda_pcm_stream to codc DAI.
In the machine driver we map/bind the codec DAI to CPU BE DAI.
I meant the difference between pcm_analog_playback,
pcm_analog_alt_playback and pcm_digital_playback in the hda_generic.c
file you mentioned.
_______________________________________________
Alsa-devel mailing list
Alsa-devel@xxxxxxxxxxxxxxxx
http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
_______________________________________________
Alsa-devel mailing list
Alsa-devel@xxxxxxxxxxxxxxxx
http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
