[Intel-gfx] [PATCH 11/11] drm/i915/icl: Wa_1406463099

[Mika Kuoppala]

Oscar Mateo <oscar.mateo at intel.com> writes:

> Prevents an error in the GAM unit. Also known as WaGamTlbPendError
>
> References: HSDES#1406463099
> References: HSDES#1406465643
> Signed-off-by: Oscar Mateo <oscar.mateo at intel.com>

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

> ---
>  drivers/gpu/drm/i915/i915_reg.h          | 5 +++--
>  drivers/gpu/drm/i915/intel_workarounds.c | 7 +++++++
>  2 files changed, 10 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 42835d79..8a18447 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -2306,8 +2306,9 @@ enum i915_power_well_id {
>  #define   GAMW_ECO_ENABLE_64K_IPS_FIELD 0xF
>  
>  #define GAMT_CHKN_BIT_REG	_MMIO(0x4ab8)
> -#define   GAMT_CHKN_DISABLE_DYNAMIC_CREDIT_SHARING	(1<<28)
> -#define   GAMT_CHKN_DISABLE_I2M_CYCLE_ON_WR_PORT	(1<<24)
> +#define   GAMT_CHKN_DISABLE_L3_COH_PIPE			(1 << 31)
> +#define   GAMT_CHKN_DISABLE_DYNAMIC_CREDIT_SHARING	(1 << 28)
> +#define   GAMT_CHKN_DISABLE_I2M_CYCLE_ON_WR_PORT	(1 << 24)
>  
>  #if 0
>  #define PRB0_TAIL	_MMIO(0x2030)
> diff --git a/drivers/gpu/drm/i915/intel_workarounds.c b/drivers/gpu/drm/i915/intel_workarounds.c
> index 474e498..77929df 100644
> --- a/drivers/gpu/drm/i915/intel_workarounds.c
> +++ b/drivers/gpu/drm/i915/intel_workarounds.c
> @@ -859,6 +859,13 @@ static void icl_gt_workarounds_apply(struct drm_i915_private *dev_priv)
>  		   PMFLUSHDONE_LNICRSDROP |
>  		   PMFLUSH_GAPL3UNBLOCK |
>  		   PMFLUSHDONE_LNEBLK);
> +
> +	/* Wa_1406463099:icl
> +	 * Formerly known as WaGamTlbPendError
> +	 */
> +	I915_WRITE(GAMT_CHKN_BIT_REG,
> +		   I915_READ(GAMT_CHKN_BIT_REG) |
> +		   GAMT_CHKN_DISABLE_L3_COH_PIPE);
>  }
>  
>  void intel_gt_workarounds_apply(struct drm_i915_private *dev_priv)
> -- 
> 1.9.1
>
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