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From: "Enrico Weigelt, metux IT consult" <lkml@metux.net>
To: "Limonciello, Mario" <Mario.Limonciello@dell.com>,
	Matthew Garrett <mjg59@srcf.ucam.org>,
	"Yuan, Perry" <Perry.Yuan@dell.com>
Cc: "hdegoede@redhat.com" <hdegoede@redhat.com>,
	"mgross@linux.intel.com" <mgross@linux.intel.com>,
	"pali@kernel.org" <pali@kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"platform-driver-x86@vger.kernel.org" 
	<platform-driver-x86@vger.kernel.org>
Subject: Re: [PATCH] platform/x86: dell-privacy: Add support for new privacy driver
Date: Thu, 12 Nov 2020 16:06:13 +0100	[thread overview]
Message-ID: <e8e06aca-c3f1-d833-c766-01f05dfa0f37@metux.net> (raw)
In-Reply-To: <DM6PR19MB2636956DB58B0E4ECAD43549FAE80@DM6PR19MB2636.namprd19.prod.outlook.com>

On 11.11.20 15:30, Limonciello, Mario wrote:

Hi,

> Pressing the mute key activates a time delayed circuit to physically cut
> off the mute.  The LED is in the same circuit, so it reflects the true
> state of the HW mute.  The reason for the EC "ack" is so that software
> can first invoke a SW mute before the HW circuit is cut off.  Without SW
> cutting this off first does not affect the time delayed muting or status
> of the LED but there is a possibility of a "popping" noise leading to a
> poor user experience.

how long is that timeout ?

> Exposing as an LED device allows the codec drivers notification path to
> EC ACK to work.

Which driver exactly ? Who's gonna access this LED ?


--mtx

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Enrico Weigelt, metux IT consult
Free software and Linux embedded engineering
info@metux.net -- +49-151-27565287

  reply	other threads:[~2020-11-12 15:06 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-03 12:55 Perry Yuan
2020-11-03 16:22 ` kernel test robot
2020-11-03 16:50 ` kernel test robot
2020-11-03 19:14 ` Barnabás Pőcze
2020-11-04  1:49 ` Matthew Garrett
2020-11-11  7:21   ` Yuan, Perry
2020-11-11  7:24     ` Matthew Garrett
2020-11-11 14:30       ` Limonciello, Mario
2020-11-12 15:06         ` Enrico Weigelt, metux IT consult [this message]
2020-11-12 15:31           ` Limonciello, Mario
2020-11-12 15:55             ` Hans de Goede
2020-11-12 15:57               ` Limonciello, Mario
2020-11-04  6:43 ` kernel test robot
2020-11-09 11:16 ` Hans de Goede
2020-11-11  7:24   ` Yuan, Perry

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