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From: Charles Keepax <ckeepax@opensource.cirrus.com>
To: Mark Brown <broonie@kernel.org>
Cc: Hans de Goede <hdegoede@redhat.com>,
	Lee Jones <lee.jones@linaro.org>,
	MyungJoo Ham <myungjoo.ham@samsung.com>,
	Chanwoo Choi <cw00.choi@samsung.com>,
	Cezary Rojewski <cezary.rojewski@intel.com>,
	Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
	Liam Girdwood <liam.r.girdwood@linux.intel.com>,
	Jie Yang <yang.jie@linux.intel.com>,
	<patches@opensource.cirrus.com>, <linux-kernel@vger.kernel.org>,
	<alsa-devel@alsa-project.org>
Subject: Re: [PATCH 01/14] mfd: arizona: Add jack pointer to struct arizona
Date: Tue, 29 Dec 2020 13:06:57 +0000	[thread overview]
Message-ID: <20201229130657.GN9673@ediswmail.ad.cirrus.com> (raw)
In-Reply-To: <20201228162807.GE5352@sirena.org.uk>

On Mon, Dec 28, 2020 at 04:28:07PM +0000, Mark Brown wrote:
> On Mon, Dec 28, 2020 at 02:16:04PM +0100, Hans de Goede wrote:
> 
> > And more in general AFAIK extcon is sort of deprecated and it is
> > not advised to use it for new code. I would esp. not expect it to
> > be used for new jack-detection code since we already have standard
> > uAPI support for that through sound/core/jack.c .
> 
> Has Android been fixed to use the ALSA/input layer interfaces?  That's
> why that code is there, long term the goal was to have ALSA generate
> extcon events too so userspace could fall over to using that.  The basic
> thing at the time was that nobody liked any of the existing interfaces
> (the input layer thing is a total bodge stemming from it having been
> easy to hack in a key for GPIO detection and using ALSA controls means
> having to link against alsa-lib which is an awful faff for system level
> UI stuff) and there were three separate userspace interfaces used by
> different software stacks which needed to be joined together, extcon was
> felt to be a bit more designed and is a superset so that was the
> direction we were heading in.

Android has been updated to have the option to catch input events
for jack detection now.

I have always been slightly confused between extcon and the ALSA
jack reporting and have been unsure as to what is the longer term
plan here. I vaguely thought there was a gentle plan to move to
extcon, it is interesting to see Hans basically saying the
opposite that extcon is intended to be paritially deprecated. I
assume you just mean with respect to audio jacks, not other
connector types?

I would agree with Mark though that if extcon exists for external
connectors it seems odd that audio jacks would have their own
special way rather than just using the connector stuff.

Thanks,
Charles

WARNING: multiple messages have this Message-ID (diff)
From: Charles Keepax <ckeepax@opensource.cirrus.com>
To: Mark Brown <broonie@kernel.org>
Cc: Cezary Rojewski <cezary.rojewski@intel.com>,
	alsa-devel@alsa-project.org, Chanwoo Choi <cw00.choi@samsung.com>,
	patches@opensource.cirrus.com,
	Jie Yang <yang.jie@linux.intel.com>,
	Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
	linux-kernel@vger.kernel.org,
	Liam Girdwood <liam.r.girdwood@linux.intel.com>,
	Hans de Goede <hdegoede@redhat.com>,
	MyungJoo Ham <myungjoo.ham@samsung.com>,
	Lee Jones <lee.jones@linaro.org>
Subject: Re: [PATCH 01/14] mfd: arizona: Add jack pointer to struct arizona
Date: Tue, 29 Dec 2020 13:06:57 +0000	[thread overview]
Message-ID: <20201229130657.GN9673@ediswmail.ad.cirrus.com> (raw)
In-Reply-To: <20201228162807.GE5352@sirena.org.uk>

On Mon, Dec 28, 2020 at 04:28:07PM +0000, Mark Brown wrote:
> On Mon, Dec 28, 2020 at 02:16:04PM +0100, Hans de Goede wrote:
> 
> > And more in general AFAIK extcon is sort of deprecated and it is
> > not advised to use it for new code. I would esp. not expect it to
> > be used for new jack-detection code since we already have standard
> > uAPI support for that through sound/core/jack.c .
> 
> Has Android been fixed to use the ALSA/input layer interfaces?  That's
> why that code is there, long term the goal was to have ALSA generate
> extcon events too so userspace could fall over to using that.  The basic
> thing at the time was that nobody liked any of the existing interfaces
> (the input layer thing is a total bodge stemming from it having been
> easy to hack in a key for GPIO detection and using ALSA controls means
> having to link against alsa-lib which is an awful faff for system level
> UI stuff) and there were three separate userspace interfaces used by
> different software stacks which needed to be joined together, extcon was
> felt to be a bit more designed and is a superset so that was the
> direction we were heading in.

Android has been updated to have the option to catch input events
for jack detection now.

I have always been slightly confused between extcon and the ALSA
jack reporting and have been unsure as to what is the longer term
plan here. I vaguely thought there was a gentle plan to move to
extcon, it is interesting to see Hans basically saying the
opposite that extcon is intended to be paritially deprecated. I
assume you just mean with respect to audio jacks, not other
connector types?

I would agree with Mark though that if extcon exists for external
connectors it seems odd that audio jacks would have their own
special way rather than just using the connector stuff.

Thanks,
Charles

  reply	other threads:[~2020-12-29 13:08 UTC|newest]

Thread overview: 106+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-27 21:12 [PATCH 00/14] MFD/extcon/ASoC: Add support for Intel Bay Trail boards with WM5102 codec Hans de Goede
2020-12-27 21:12 ` Hans de Goede
2020-12-27 21:12 ` [PATCH 01/14] mfd: arizona: Add jack pointer to struct arizona Hans de Goede
2020-12-27 21:12   ` Hans de Goede
2020-12-28 12:21   ` Mark Brown
2020-12-28 12:21     ` Mark Brown
2020-12-28 13:16     ` Hans de Goede
2020-12-28 13:16       ` Hans de Goede
2020-12-28 16:28       ` Mark Brown
2020-12-28 16:28         ` Mark Brown
2020-12-29 13:06         ` Charles Keepax [this message]
2020-12-29 13:06           ` Charles Keepax
2020-12-29 13:57           ` Hans de Goede
2020-12-29 13:57             ` Hans de Goede
2020-12-29 15:06             ` Charles Keepax
2020-12-29 15:06               ` Charles Keepax
2020-12-29 15:15               ` Mark Brown
2020-12-29 15:15                 ` Mark Brown
2020-12-29 15:40                 ` Hans de Goede
2020-12-29 15:40                   ` Hans de Goede
2020-12-29 16:51                   ` Richard Fitzgerald
2020-12-29 16:51                     ` Richard Fitzgerald
2020-12-30 11:04                     ` Hans de Goede
2020-12-30 11:04                       ` Hans de Goede
2020-12-30 11:23                       ` Richard Fitzgerald
2020-12-30 11:23                         ` Richard Fitzgerald
2020-12-30 12:01                         ` Hans de Goede
2020-12-30 12:01                           ` Hans de Goede
2020-12-30 13:16                     ` Mark Brown
2020-12-30 13:16                       ` Mark Brown
2020-12-29 16:43               ` Richard Fitzgerald
2020-12-29 16:43                 ` Richard Fitzgerald
2020-12-29 15:08             ` Mark Brown
2020-12-29 15:08               ` Mark Brown
2020-12-29 15:33               ` Hans de Goede
2020-12-29 15:33                 ` Hans de Goede
2020-12-30 13:38                 ` Mark Brown
2020-12-30 13:38                   ` Mark Brown
2021-01-01 13:24                   ` Hans de Goede
2021-01-01 13:24                     ` Hans de Goede
2020-12-27 21:12 ` [PATCH 02/14] mfd: arizona: Add MODULE_SOFTDEP("pre: arizona_ldo1") Hans de Goede
2020-12-27 21:12   ` Hans de Goede
2020-12-29 11:40   ` Charles Keepax
2020-12-29 11:40     ` Charles Keepax
2020-12-27 21:12 ` [PATCH 03/14] mfd: arizona: Add support for ACPI enumeration of WM5102 connected over SPI Hans de Goede
2020-12-27 21:12   ` Hans de Goede
2020-12-28  1:21   ` kernel test robot
2020-12-28  1:21     ` kernel test robot
2020-12-28  1:21   ` [RFC PATCH] mfd: arizona: ldoena_gpios can be static kernel test robot
2020-12-28  1:21     ` kernel test robot
2020-12-28 14:14   ` [PATCH 03/14] mfd: arizona: Add support for ACPI enumeration of WM5102 connected over SPI Andy Shevchenko
2020-12-28 14:14     ` Andy Shevchenko
2021-01-16 14:46     ` Hans de Goede
2021-01-16 14:46       ` Hans de Goede
2020-12-28 22:11   ` kernel test robot
2020-12-28 22:11     ` kernel test robot
2020-12-28 22:29   ` kernel test robot
2020-12-28 22:29     ` kernel test robot
2020-12-27 21:12 ` [PATCH 04/14] mfd: arizona: Allow building arizona MFD-core as module Hans de Goede
2020-12-27 21:12   ` Hans de Goede
2020-12-29 12:00   ` Charles Keepax
2020-12-29 12:00     ` Charles Keepax
2021-01-11 19:12     ` Hans de Goede
2021-01-11 19:12       ` Hans de Goede
2020-12-27 21:12 ` [PATCH 05/14] extcon: arizona: Fix some issues when HPDET IRQ fires after the jack has been unplugged Hans de Goede
2020-12-27 21:12   ` Hans de Goede
2020-12-27 21:12 ` [PATCH 06/14] extcon: arizona: Fix various races on driver unbind Hans de Goede
2020-12-27 21:12   ` Hans de Goede
2020-12-29 12:10   ` Charles Keepax
2020-12-29 12:10     ` Charles Keepax
2020-12-27 21:12 ` [PATCH 07/14] extcon: arizona: Fix modalias Hans de Goede
2020-12-27 21:12   ` Hans de Goede
2020-12-29 12:10   ` Charles Keepax
2020-12-29 12:10     ` Charles Keepax
2020-12-27 21:12 ` [PATCH 08/14] extcon: arizona: Fix flags parameter to the gpiod_get("wlf,micd-pol") call Hans de Goede
2020-12-27 21:12   ` [PATCH 08/14] extcon: arizona: Fix flags parameter to the gpiod_get("wlf, micd-pol") call Hans de Goede
2020-12-29 12:12   ` [PATCH 08/14] extcon: arizona: Fix flags parameter to the gpiod_get("wlf,micd-pol") call Charles Keepax
2020-12-29 12:12     ` Charles Keepax
2020-12-27 21:12 ` [PATCH 09/14] extcon: arizona: Add arizona_set_extcon_state() helper Hans de Goede
2020-12-27 21:12   ` Hans de Goede
2020-12-29 12:57   ` Charles Keepax
2020-12-29 12:57     ` Charles Keepax
2020-12-27 21:12 ` [PATCH 10/14] extcon: arizona: Also report jack state through snd_soc_jack_report() Hans de Goede
2020-12-27 21:12   ` Hans de Goede
2020-12-28 14:16   ` Andy Shevchenko
2020-12-28 14:16     ` Andy Shevchenko
2020-12-27 21:12 ` [PATCH 11/14] extcon: arizona: Use ASoC jack input-device when available Hans de Goede
2020-12-27 21:12   ` Hans de Goede
2020-12-27 21:12 ` [PATCH 12/14] ASoC: Intel: Add DMI quirk table to soc_intel_is_byt_cr() Hans de Goede
2020-12-27 21:12   ` Hans de Goede
2021-01-11 17:52   ` Pierre-Louis Bossart
2021-01-11 17:52     ` Pierre-Louis Bossart
2020-12-27 21:12 ` [PATCH 13/14] ASoC: Intel: bytcr_wm5102: Add machine driver for BYT/WM5102 Hans de Goede
2020-12-27 21:12   ` Hans de Goede
2020-12-29 13:58   ` Charles Keepax
2020-12-29 13:58     ` Charles Keepax
2021-01-11 17:54     ` Pierre-Louis Bossart
2021-01-11 17:54       ` Pierre-Louis Bossart
2021-01-16 16:49     ` Hans de Goede
2021-01-16 16:49       ` Hans de Goede
2020-12-27 21:12 ` [PATCH 14/14] ASoC: Intel: bytcr_wm5102: Add jack detect support Hans de Goede
2020-12-27 21:12   ` Hans de Goede
2020-12-28 14:19 ` [PATCH 00/14] MFD/extcon/ASoC: Add support for Intel Bay Trail boards with WM5102 codec Andy Shevchenko
2020-12-28 14:19   ` Andy Shevchenko
2021-01-11 18:54   ` Hans de Goede
2021-01-11 18:54     ` Hans de Goede

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