[Intel-gfx] [PATCH 2/2] drm/i915/tgl: Add Wa_1408615072

[Ville Syrjälä]

On Wed, Nov 13, 2019 at 11:18:40AM -0800, Radhakrishna Sripada wrote:
> Disable VS Unit Clockgating.
> 
> BSpec: 52857
> Cc: Mika Kuoppala <mika.kuoppala at linux.intel.com>
> Signed-off-by: Radhakrishna Sripada <radhakrishna.sripada at intel.com>
> ---
>  drivers/gpu/drm/i915/i915_reg.h | 1 +
>  drivers/gpu/drm/i915/intel_pm.c | 4 ++++
>  2 files changed, 5 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 2ffcc21670b7..3714eb641124 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -4172,6 +4172,7 @@ enum {
>  
>  #define UNSLICE_UNIT_LEVEL_CLKGATE	_MMIO(0x9434)
>  #define  VFUNIT_CLKGATE_DIS		(1 << 20)
> +#define  VSUNIT_CLKGATE_DIS		(1 << 3)
>  
>  #define INF_UNIT_LEVEL_CLKGATE		_MMIO(0x9560)
>  #define   CGPSF_CLKGATE_DIS		(1 << 3)
> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index 2d389e437e87..fe32c0433971 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -6572,6 +6572,10 @@ static void tgl_init_clock_gating(struct drm_i915_private *dev_priv)
>  
>  	I915_WRITE(POWERGATE_ENABLE,
>  		   I915_READ(POWERGATE_ENABLE) | vd_pg_enable);
> +
> +	/* Wa_1408615072:tgl */
> +	I915_WRITE(UNSLICE_UNIT_LEVEL_CLKGATE,
> +		   I915_READ(UNSLICE_UNIT_LEVEL_CLKGATE) | VFUNIT_CLKGATE_DIS);

VF vs. VS

>  }
>  
>  static void cnp_init_clock_gating(struct drm_i915_private *dev_priv)
> -- 
> 2.20.1
> 
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx

-- 
Ville Syrjälä
Intel