Messages in this thread | | | Subject | Re: [PATCH 1/3] ALSA: hda/tegra: Skip reset on BPMP devices | From | Sameer Pujar <> | Date | Tue, 7 Dec 2021 23:07:51 +0530 |
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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.
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