>-----Original Message-----
>From: Wajdeczko, Michal
>Sent: Monday, September 10, 2018 3:42 AM
>To: intel-gfx@xxxxxxxxxxxxxxxxxxxxx
>Cc: Wajdeczko, Michal <Michal.Wajdeczko@xxxxxxxxx>; Spotswood, John A
><john.a.spotswood@xxxxxxxxx>; Srivatsa, Anusha <anusha.srivatsa@xxxxxxxxx>;
>Lis, Tomasz <tomasz.lis@xxxxxxxxx>; Ceraolo Spurio, Daniele
><daniele.ceraolospurio@xxxxxxxxx>
>Subject: [CI v2 1/2] drm/i915/guc: Update GuC power domain states
>
>We should update GuC power domain states also when GuC submission is
>disabled, otherwise GuC might complain or ignore our requests.
>This seems to be required for all currently released GuC firmwares.
>
>v2: it is only needed by pre-Gen11 firmwares
>
>Signed-off-by: Michal Wajdeczko <michal.wajdeczko@xxxxxxxxx>
>Cc: John Spotswood <john.a.spotswood@xxxxxxxxx>
>Cc: Anusha Srivatsa <anusha.srivatsa@xxxxxxxxx>
>Cc: Tomasz Lis <tomasz.lis@xxxxxxxxx>
>Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@xxxxxxxxx>
Reviewed-by: Anusha Srivatsa <anusha.srivatsa@xxxxxxxxx>
>---
> drivers/gpu/drm/i915/intel_uc.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
>diff --git a/drivers/gpu/drm/i915/intel_uc.c b/drivers/gpu/drm/i915/intel_uc.c
>index 7c95697..b1b3e81 100644
>--- a/drivers/gpu/drm/i915/intel_uc.c
>+++ b/drivers/gpu/drm/i915/intel_uc.c
>@@ -401,6 +401,10 @@ int intel_uc_init_hw(struct drm_i915_private *i915)
> ret = intel_guc_submission_enable(guc);
> if (ret)
> goto err_communication;
>+ } else if (INTEL_GEN(i915) < 11) {
>+ ret = intel_guc_sample_forcewake(guc);
>+ if (ret)
>+ goto err_communication;
> }
>
> dev_info(i915->drm.dev, "GuC firmware version %u.%u\n",
>--
>1.9.1
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