[Intel-gfx] [PATCH v8 7/7] drm/i915/mtl: Add support for PM DEMAND

[Govindapillai, Vinod]

Hi

I think so far with my trials port clock changes in sync with phys. As pmdemand atomic check is called many times, I don't think optimizing is bad.

Br
Vinod

________________________________
From: Sousa, Gustavo <gustavo.sousa at intel.com>
Sent: Thursday, 25 May 2023, 17:58
To: Govindapillai, Vinod <vinod.govindapillai at intel.com>; intel-gfx at lists.freedesktop.org <intel-gfx at lists.freedesktop.org>
Cc: Syrjala, Ville <ville.syrjala at intel.com>; Lisovskiy, Stanislav <stanislav.lisovskiy at intel.com>; Kahola, Mika <mika.kahola at intel.com>; Saarinen, Jani <jani.saarinen at intel.com>
Subject: Re: [PATCH v8 7/7] drm/i915/mtl: Add support for PM DEMAND

Quoting Govindapillai, Vinod (2023-05-25 11:31:05-03:00)
>   Hi
>
> (...)
>
>   Can only the phys change without impacting other parameters here?

Not sure to be honest, but, if so, I think we would covering cases like
that with the proposed change. IMO, if we depend on PHYs being
active/non-active, we should track that to in pmdemand_needs_update() be
safe.

One scenario I could think of is an update to switch connectors while
keeping current pipe configuration.

--
Gustavo Sousa

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