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From: Sameer Pujar <spujar@nvidia.com>
To: Dmitry Osipenko <digetx@gmail.com>,
	tiwai@suse.com, broonie@kernel.org, lgirdwood@gmail.com,
	thierry.reding@gmail.com, perex@perex.cz
Cc: jonathanh@nvidia.com, alsa-devel@alsa-project.org,
	devicetree@vger.kernel.org, linux-tegra@vger.kernel.org,
	linux-kernel@vger.kernel.org, stable@vger.kernel.org,
	Mohan Kumar <mkumard@nvidia.com>,
	robh+dt@kernel.org
Subject: Re: [PATCH 1/3] ALSA: hda/tegra: Skip reset on BPMP devices
Date: Tue, 7 Dec 2021 23:07:51 +0530	[thread overview]
Message-ID: <148fba18-5d14-d342-0eb9-4ff224cc58ad@nvidia.com> (raw)
In-Reply-To: <95cc7efa-251c-690b-9afa-53ee9e052c34@gmail.com>



On 12/7/2021 9:05 PM, Dmitry Osipenko wrote:
> External email: Use caution opening links or attachments
>
>
> 07.12.2021 17:49, Sameer Pujar пишет:
> ...
>>>> How the reload case would be different? Can you please specify more
>>>> details if you are referring to a particular scenario?
>>> You have a shared power domain. Since power domain can be turned off
>>> only when nobody keeps domain turned on, you now making reset of HDA
>>> controller dependent on the state of display driver.
>> I don't think that the state of display driver would affect. The HDA
>> driver itself can issue unpowergate calls which in turn ensures h/w
>> reset. If display driver is already runtime active, HDA driver runtime
>> resume after this would be still fine since h/w reset is already applied
>> during display runtime resume. Note that both HDA and display resets are
>> connected to this power-domain and BPMP applies these resets during
>> unpowergate.
> HDA won't be reset while display is active on T186+.

No. HDA reset is applied whenever power-domain is ungated. It can happen 
when either HDA or display device becomes active. So I don't think that 
it is inconsistent.

  reply	other threads:[~2021-12-07 17:38 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-07  6:32 [PATCH 0/3] Fix Tegra194 HDA regression Sameer Pujar
2021-12-07  6:32 ` [PATCH 1/3] ALSA: hda/tegra: Skip reset on BPMP devices Sameer Pujar
2021-12-07  8:16   ` Thierry Reding
2021-12-07  8:36     ` Takashi Iwai
2021-12-07  9:09       ` Sameer Pujar
2021-12-07 10:22   ` Dmitry Osipenko
2021-12-07 10:44     ` Dmitry Osipenko
2021-12-07 10:58       ` Dmitry Osipenko
2021-12-07 11:02         ` Jon Hunter
2021-12-07 11:57           ` Dmitry Osipenko
2021-12-07 15:07             ` Jon Hunter
2021-12-07 12:00     ` Sameer Pujar
2021-12-07 12:05       ` Dmitry Osipenko
2021-12-07 12:40         ` Sameer Pujar
2021-12-07 14:07           ` Dmitry Osipenko
2021-12-07 14:49             ` Sameer Pujar
2021-12-07 15:35               ` Dmitry Osipenko
2021-12-07 17:37                 ` Sameer Pujar [this message]
2021-12-07 18:02                   ` Dmitry Osipenko
2021-12-08  5:22                     ` Sameer Pujar
2021-12-08 12:05                       ` Dmitry Osipenko
2021-12-14  6:02                         ` Sameer Pujar
2021-12-14  6:09                           ` Dmitry Osipenko
2021-12-14  6:15                             ` Dmitry Osipenko
2021-12-14  7:22                             ` Sameer Pujar
2021-12-14 13:56                               ` Dmitry Osipenko
2021-12-14 14:29                                 ` Takashi Iwai
2021-12-14 15:34                                   ` Dmitry Osipenko
2021-12-20 10:32                                 ` Sameer Pujar
2021-12-07  6:32 ` [PATCH 2/3] dt-bindings: sound: tegra: Update HDA resets Sameer Pujar
2021-12-07  8:18   ` Thierry Reding
2021-12-07  9:27     ` Sameer Pujar
2021-12-07 10:14   ` Dmitry Osipenko
2021-12-07 11:04     ` Sameer Pujar
2021-12-07 12:02       ` Dmitry Osipenko
2021-12-07 12:22         ` Sameer Pujar
2021-12-07  6:32 ` [PATCH 3/3] arm64: tegra: Remove non existent Tegra194 reset Sameer Pujar
2021-12-07  8:04 ` [PATCH 0/3] Fix Tegra194 HDA regression Takashi Iwai
2021-12-07  8:21   ` Thierry Reding

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