[PATCH 37/47] drm/i915/guc: Enable the timer expired interrupt for GuC

[John Harrison]

On 6/24/2021 00:05, Matthew Brost wrote:
> The GuC can implement execution qunatums, detect hung contexts and
> other such things but it requires the timer expired interrupt to do so.
>
> Signed-off-by: Matthew Brost <matthew.brost at intel.com>
> CC: John Harrison <John.C.Harrison at Intel.com>
Reviewed-by: John Harrison <John.C.Harrison at Intel.com>

> ---
>   drivers/gpu/drm/i915/gt/intel_rps.c | 4 ++++
>   1 file changed, 4 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_rps.c b/drivers/gpu/drm/i915/gt/intel_rps.c
> index 06e9a8ed4e03..0c8e7f2b06f0 100644
> --- a/drivers/gpu/drm/i915/gt/intel_rps.c
> +++ b/drivers/gpu/drm/i915/gt/intel_rps.c
> @@ -1877,6 +1877,10 @@ void intel_rps_init(struct intel_rps *rps)
>   
>   	if (GRAPHICS_VER(i915) >= 8 && GRAPHICS_VER(i915) < 11)
>   		rps->pm_intrmsk_mbz |= GEN8_PMINTR_DISABLE_REDIRECT_TO_GUC;
> +
> +	/* GuC needs ARAT expired interrupt unmasked */
> +	if (intel_uc_uses_guc_submission(&rps_to_gt(rps)->uc))
> +		rps->pm_intrmsk_mbz |= ARAT_EXPIRED_INTRMSK;
>   }
>   
>   void intel_rps_sanitize(struct intel_rps *rps)