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From: "Srivatsa, Anusha" <anusha.srivatsa@intel.com>
To: "Vivi, Rodrigo" <rodrigo.vivi@intel.com>, "igt-dev@lists.freedesktop.org"
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Date: Wed, 20 Apr 2022 19:07:18 +0000
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Subject: Re: [igt-dev] [PATCH i-g-t] tests/i915/i915_pm_dc.c: Remove PC8+
 dependency from DC9.
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> -----Original Message-----
> From: Vivi, Rodrigo <rodrigo.vivi@intel.com>
> Sent: Wednesday, April 20, 2022 11:46 AM
> To: igt-dev@lists.freedesktop.org
> Cc: Vivi, Rodrigo <rodrigo.vivi@intel.com>; Deak, Imre
> <imre.deak@intel.com>; Gupta, Anshuman <anshuman.gupta@intel.com>;
> Srivatsa, Anusha <anusha.srivatsa@intel.com>
> Subject: [PATCH i-g-t] tests/i915/i915_pm_dc.c: Remove PC8+ dependency
> from DC9.
>=20
> Different from DC6, DC9 does not depend on the BIOS/PCU to execute save
> and restore or any other sequence when going to PC9/PC10.
>=20
> DC9 actually depends on D3 and PCODE simply remove power if SW allowed.

Is this the case for both igfx and dgfx?

Anusha

> Cc: Imre Deak <imre.deak@intel.com>
> Cc: Anshuman Gupta <anshuman.gupta@intel.com>
> Cc: Anusha Srivatsa <anusha.srivatsa@intel.com>
> Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
> ---
>  tests/i915/i915_pm_dc.c | 2 --
>  1 file changed, 2 deletions(-)
>=20
> diff --git a/tests/i915/i915_pm_dc.c b/tests/i915/i915_pm_dc.c index
> 2c2c5086..9a22246c 100644
> --- a/tests/i915/i915_pm_dc.c
> +++ b/tests/i915/i915_pm_dc.c
> @@ -531,8 +531,6 @@ int main(int argc, char *argv[])
>=20
>  	igt_describe("This test validates display engine entry to DC9 state");
>  	igt_subtest("dc9-dpms") {
> -
> 	igt_require_f(igt_pm_pc8_plus_residencies_enabled(data.msr_fd),
> -				"PC8+ residencies not supported\n");
>  		test_dc9_dpms(&data);
>  	}
>=20
> --
> 2.34.1