From: Dmitry Osipenko <digetx@gmail.com>
To: Sameer Pujar <spujar@nvidia.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 18:35:21 +0300 [thread overview]
Message-ID: <95cc7efa-251c-690b-9afa-53ee9e052c34@gmail.com> (raw)
In-Reply-To: <f32cde65-63dc-67f8-ded8-b58ea5e89f4e@nvidia.com>
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+.
HDA will be reset while is display is inactive on T186+.
HDA will be reset regardless of display state on pre-T186.
This is a pure inconsistency of the reset behaviour. Please don't do it.
next prev parent reply other threads:[~2021-12-07 15:35 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 [this message]
2021-12-07 17:37 ` Sameer Pujar
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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