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From: Tony Lindgren <tony@atomide.com>
To: Sebastian Reichel <sebastian.reichel@collabora.com>
Cc: alsa-devel@alsa-project.org, linux-omap@vger.kernel.org,
	Aaro Koskinen <aaro.koskinen@iki.fi>,
	linux-kernel@vger.kernel.org, Merlijn Wajer <merlijn@wizzup.org>,
	Takashi Iwai <tiwai@suse.com>,
	Liam Girdwood <lgirdwood@gmail.com>,
	Peter Ujfalusi <peter.ujfalusi@ti.com>,
	Mark Brown <broonie@kernel.org>, Pavel Machek <pavel@ucw.cz>,
	"Arthur D ." <spinal.by@gmail.com>,
	Jarkko Nikula <jarkko.nikula@bitmer.com>
Subject: Re: [PATCH] ASoC: ti: Allocate dais dynamically for TDM and audio graph card
Date: Tue, 18 Feb 2020 06:19:05 -0800
Message-ID: <20200218141905.GG35972@atomide.com> (raw)
In-Reply-To: <20200218140431.emrxgvckrpltmg2s@earth.universe>

* Sebastian Reichel <sebastian.reichel@collabora.com> [200218 06:05]:
> Hi,
> 
> On Fri, Feb 14, 2020 at 09:09:46AM -0800, Tony Lindgren wrote:
> > * Sebastian Reichel <sre@kernel.org> [200214 13:05]:
> > > On Thu, Feb 13, 2020 at 05:34:54PM -0800, Tony Lindgren wrote:
> > > > And bluetooth would be similar to cpcap_audio and mot_mdm6600_audio
> > > > above.
> > > 
> > > My understanding is, that CPU is not involved for calls (except for
> > > setting up cpcap registers correctly). Basically McBSP3 should
> > > remain idle for a call and data goes directly from modem to cpcap.
> > > The same should work for modem <-> BT, except that CPCAP seems to
> > > always provide the clock. That would imply a direct link between
> > > modem and codec / BT?
> > 
> > Yes the direct link is i2s. I'm ot sure if mcbsp can be idle during
> > voice call though, I guess it should be doable since mcbsp is not
> > the clock master :)
> > 
> > > > My guess is that only cpcap registers and clock rate needs to be
> > > > changed for bluetooth audio BTW, so if somebody havs a bluetooth
> > > > headset just do the following in Android:
> > > > 
> > > > # cpcaprw --all > /tmp/before
> > > > configure bluetooth headset for audio in android and start
> > > > playing some music or make a phone call
> > > > ...
> > > > # cpcaprw --all > /tmp/after
> > > > stop playing music or phone call
> > > > ...
> > > > diff -u /tmp/before /tmp/after
> > > > 
> > > > The registers will be different for a bluetooth phone call and
> > > > playing music.
> > > 
> > > I can provider register values once I find some time.
> 
> [NI] Normal idle (no BT headset connected)
> [BI] Bluetooth idle (with BT headset connected)
> [BC] Bluetooth call in progress
> [NC] Normal call in progress (BT headset disabled)
> 
>                      [NI]  =>  [BI]  =>  [BC]  =>  [NC]
> CPCAP_REG_VAUDIOC   0x0065 => 0x0065 => 0x0065 => 0x0025
> CPCAP_REG_CC        0x0000 => 0x0000 => 0x6000 => 0x60df
> CPCAP_REG_CDI       0x0040 => 0x0000 => 0xaa40 => 0xae0a
> CPCAP_REG_SDAC      -------------- 0x0000 --------------
> CPCAP_REG_SDACDI    -------------- 0x0004 --------------
> CPCAP_REG_TXI       0x0804 => 0x0004 => 0x0000 => 0x0cc6
> CPCAP_REG_TXMP      0x079c => 0x079c => 0x0400 => 0x0673
> CPCAP_REG_RXOA      0x0000 => 0x0000 => 0x0001 => 0x0001
> CPCAP_REG_RXVC      0x0d34 => 0x0d34 => 0x0000 => 0x0b2c
> CPCAP_REG_RXCOA     0x0000 => 0x0000 => 0x0000 => 0x0601
> CPCAP_REG_RXSDOA    0x0000 => 0x0000 => 0x0600 => 0x0600
> CPCAP_REG_RXEPOA    -------------- 0x0400 --------------
> CPCAP_REG_RXLL      -------------- 0x0000 --------------
> CPCAP_REG_A2LA      -------------- 0x0030 --------------
> CPCAP_REG_MIPIS1    -------------- 0x0000 --------------
> CPCAP_REG_MIPIS2    -------------- 0x0000 --------------
> CPCAP_REG_MIPIS3    -------------- 0x0000 --------------
> CPCAP_REG_LVAB      -------------- 0x0000 --------------

Great thanks! Care to do also a dump just playing music to on
bluetooth headset at some point?

Regards,

Tony



  reply index

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-11 17:16 [alsa-devel] " Tony Lindgren
2020-02-12  8:02 ` Peter Ujfalusi
2020-02-12 14:35   ` Tony Lindgren
2020-02-14  0:34     ` Sebastian Reichel
2020-02-14  1:34       ` Tony Lindgren
2020-02-14 13:04         ` Sebastian Reichel
2020-02-14 17:09           ` Tony Lindgren
2020-02-18 14:04             ` Sebastian Reichel
2020-02-18 14:19               ` Tony Lindgren [this message]
2020-02-18 16:35                 ` Sebastian Reichel
2020-02-14 12:41     ` [alsa-devel] " Peter Ujfalusi
2020-02-14 12:49       ` Mark Brown
2020-02-14 17:05         ` Tony Lindgren
2020-02-14 20:05           ` Mark Brown
2020-02-14 17:03       ` Tony Lindgren
2020-02-17  1:38         ` Kuninori Morimoto
2020-02-17  5:25           ` Kuninori Morimoto
2020-02-17 12:09         ` Peter Ujfalusi
2020-02-17 23:10           ` Tony Lindgren
2020-02-17 23:36             ` Tony Lindgren
2020-02-18 15:26               ` Peter Ujfalusi
2020-02-18 15:34                 ` Tony Lindgren
2020-02-18 12:43             ` Peter Ujfalusi
2020-02-18 15:28               ` Tony Lindgren
2020-02-20 14:07                 ` Peter Ujfalusi
2020-02-20 20:13                   ` Tony Lindgren
2020-02-21 14:07                     ` Peter Ujfalusi
2020-02-18 21:16               ` Sebastian Reichel
2020-02-20 14:15                 ` Peter Ujfalusi
2020-02-20 20:15                   ` Tony Lindgren
2020-02-21 13:20                     ` Peter Ujfalusi
2020-02-21 18:08                       ` Tony Lindgren
2020-02-20 20:47                   ` Sebastian Reichel

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