[Intel-gfx] [PATCH 1/4] drm/i915/skl: add turbo support

[Mika Kuoppala]

Damien Lespiau <damien.lespiau at intel.com> writes:

> From: Jesse Barnes <jbarnes at virtuousgeek.org>
>
> Per latest PM programming guide.
>
> v2: the wrong flavour of the function updating the ring frequency was
>     called, leading to dead locks (Tvrtko)
>
> v3: Add GEN6_RP_MEDIA_IS_GFX to RP_CONTROL (Imre, done by Damien)
>
> Signed-off-by: Jesse Barnes <jbarnes at virtuousgeek.org>
> Signed-off-by: Damien Lespiau <damien.lespiau at intel.com>

Reviewed-by: Mika Kuoppala <mika.kuoppala at intel.com>

> ---
>  drivers/gpu/drm/i915/intel_pm.c | 30 ++++++++++++++++++++++++++++++
>  1 file changed, 30 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index 03fc7f2..3a0aec0 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -4025,9 +4025,37 @@ static void gen6_init_rps_frequencies(struct drm_device *dev)
>  	}
>  }
>  
> +/* See the Gen9_GT_PM_Programming_Guide doc for the below */
>  static void gen9_enable_rps(struct drm_device *dev)
>  {
>  	struct drm_i915_private *dev_priv = dev->dev_private;
> +
> +	gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
> +
> +	I915_WRITE(GEN6_RPNSWREQ, 0xc800000);
> +	I915_WRITE(GEN6_RC_VIDEO_FREQ, 0xc800000);
> +
> +	I915_WRITE(GEN6_RP_DOWN_TIMEOUT, 0xf4240);
> +	I915_WRITE(GEN6_RP_INTERRUPT_LIMITS, 0x12060000);
> +	I915_WRITE(GEN6_RP_UP_THRESHOLD, 0xe808);
> +	I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 0x3bd08);
> +	I915_WRITE(GEN6_RP_UP_EI, 0x101d0);
> +	I915_WRITE(GEN6_RP_DOWN_EI, 0x55730);
> +	I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 0xa);
> +	I915_WRITE(GEN6_PMINTRMSK, 0x6);
> +	I915_WRITE(GEN6_RP_CONTROL, GEN6_RP_MEDIA_TURBO |
> +		   GEN6_RP_MEDIA_HW_MODE | GEN6_RP_MEDIA_IS_GFX |
> +		   GEN6_RP_ENABLE | GEN6_RP_UP_BUSY_AVG |
> +		   GEN6_RP_DOWN_IDLE_AVG);
> +
> +	gen6_enable_rps_interrupts(dev);
> +
> +	gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
> +}
> +
> +static void gen9_enable_rc6(struct drm_device *dev)
> +{
> +	struct drm_i915_private *dev_priv = dev->dev_private;
>  	struct intel_engine_cs *ring;
>  	uint32_t rc6_mask = 0;
>  	int unused;
> @@ -5527,7 +5555,9 @@ static void intel_gen6_powersave_work(struct work_struct *work)
>  	} else if (IS_VALLEYVIEW(dev)) {
>  		valleyview_enable_rps(dev);
>  	} else if (INTEL_INFO(dev)->gen >= 9) {
> +		gen9_enable_rc6(dev);
>  		gen9_enable_rps(dev);
> +		__gen6_update_ring_freq(dev);
>  	} else if (IS_BROADWELL(dev)) {
>  		gen8_enable_rps(dev);
>  		__gen6_update_ring_freq(dev);
> -- 
> 1.8.3.1
>
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